KR101604367B1

KR101604367B1 - Bypass/blocking apparatus for replaceing of control valve

Info

Publication number: KR101604367B1
Application number: KR1020150154789A
Authority: KR
Inventors: 이철우; 최기훈
Original assignee: 주식회사 제이에스티앤랩
Priority date: 2015-11-04
Filing date: 2015-11-04
Publication date: 2016-03-17

Abstract

The present invention relates to a bypass / blocking device for replacement of a control valve. In the apparatus of the present invention, a main body 10 for mounting to a facility is provided. In the main body 10, the first flow paths 20 and the second flow paths 24 are formed at different heights. A flow setting unit 40 is installed in the main body 10 and a flow setting block 42 of the flow setting unit 40 is formed with a spool space 44 in which a spool 60 is installed, The pressure fluid delivered through the second supply flow path 24P of the second flow path 24 is delivered to the control valve 80 through the first supply flow path 20P of the first flow path 20 And the second flow path 24A of the second flow path 24, as shown in FIG. The control valve 80 can be disengaged if the pressure fluid is not transmitted to the first flow path 20 and the pressure fluid is transmitted to the equipment side through the second flow path 24A of the second flow path 20 The entire facility can be operated without stopping even when the control valve 80 is replaced. According to the present invention as described above, there is an advantage that the entire facility is not required to be stopped for replacement of the control valve (80).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bypass /

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bypass / blocking device for replacing a control valve, and more particularly, to a bypass / blocking device for replacing a control valve used for controlling equipment during operation of a facility .

For example, a large-scale facility such as a power generation facility has a problem in that it is time-consuming and costly to stop and restart the operation. Therefore, when various components constituting the power generation facilities are broken down, it takes a lot of time and cost to replace them.

Therefore, it is necessary to be able to replace the equipment without stopping even if a specific part fails. For example, in the case of a control valve for supplying hydraulic pressure, if the control valve is disconnected from the facility, the fluid leaks from the supply port, the entire facility must be stopped and the failed control valve replaced. However, in this case, there arises a problem that the entire facility must be shut down for replacement of one control valve.

In addition, since a high-pressure fluid is used in the case of a control valve, a large friction is generated in the handle for controlling the flow, so that the handle becomes very difficult to operate. In addition, And the handle connected to the spool is rotated arbitrarily.

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 to enable replacement of a failed control valve for controlling the hydraulic pressure while continuously operating the equipment.

Another object of the present invention is to smoothly operate the handle of the bypass / blocking device for replacing the failed control valve for controlling the hydraulic pressure.

Another object of the present invention is to prevent the handle of the bypass / blocking device for replacing a failed control valve for controlling the hydraulic pressure from being arbitrarily rotated.

According to an aspect of the present invention for achieving the above object, the present invention is characterized in that the present invention is mounted at a position where a control valve for performing control for the operation of an actuator or a cylinder is mounted, And a control valve for supplying pressure fluid directly to the actuator and the cylinder during the replacement of the control valve, the bypass / blocking device being mounted on the actuator or the cylinder, A flow setting block is mounted on the block seat portion of the main body, a spool is installed in the spool space in the flow setting block, and the spool is mounted on a handle And the control fluid is supplied to the control valve And a flow setting section for directly delivering the pressure fluid to the actuator or the cylinder side, and a first supply flow path being a first flow path for transferring the pressure fluid between the control valve and the flow setting block, A second supply passage which is a second flow passage for transferring the pressure fluid between the outside of the main body and the flow setting block at a height different from the first flow passage among the inside of the main body, The first flow paths and the second flow paths communicate with the spool space of the flow setting block so that the first flow path and the second flow path communicate with each other by the spool, Or the second supply passage and the second passage are communicated with each other.

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The spool installed in the spool space inside the flow setting block protrudes through the cover mounted on the spool space inlet of the flow setting block and the spool arm on which the handle is installed projects between the cover and the spool, So that the pressure of the pressure fluid is made to rotate with respect to the cover even if it acts on the spool.

Wherein a stop pin is provided on a front surface of the cover to limit an angle at which the handle rotates, and the handle is provided with a stop pin for hooking the stop pin, .

Wherein the spool includes a spool body positioned in the spool space and a spool arm extending outwardly of the spool space, wherein the spool body normally has communication paths for communication between the first flow path and the second flow path, A first bypass flow path for bypassing the pressure fluid from the second supply flow path to the second direction flow path is formed during replacement of the valve.

And a second bypass flow path communicating with the first bypass flow path through the first and second through holes and formed opposite to the rotation center axis of the spool and being supplied through the second supply flow path Thereby canceling the moment generation due to the pressure fluid.

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

In the present invention, even if a control valve using a pressurized fluid fails to control the operation of a component in a predetermined facility, the pressure fluid can be flowed through the bypass flow path to perform the original function of the control valve, This can be done without stopping the facility. Therefore, since it is not necessary to stop the facility at the time of replacing the control valve, the maintenance cost of the facility can be minimized.

In addition, in the bypass / blocking apparatus of the present invention, the thrust needle bearing is provided to the cover even if the spool is in close contact with the cover due to the pressure of the pressure fluid during the operation of controlling the flow path for the pressure fluid. Therefore, So that the convenience of the operator can be improved.

In the present invention, in order to prevent the spool from rotating due to the force applied to the spool by the pressure fluid in the process of bypassing the pressure fluid by using the spool, the force applied to the spool by the pressure fluid is canceled Placed on both sides. Therefore, the spool is prevented from rotating by the pressure fluid at the time of bypassing, and the operation of the entire apparatus is accurately performed.

1 is a perspective view showing a configuration of a preferred embodiment of a bypass / blocking device for replacing a control valve according to the present invention.
2 is an exploded perspective view showing the configuration of the embodiment shown in Fig.
3 is a perspective view showing a configuration of a main body constituting the embodiment shown in Fig.
4 is a bottom perspective view showing a bottom surface structure of a main body constituting the embodiment shown in Fig.
5 is a perspective view showing a configuration of a flow setting block constituting the embodiment shown in FIG.
FIG. 6 is a perspective view showing a spool constituting the embodiment shown in FIG. 1; FIG.
Fig. 7 is a perspective view showing a rear end of a spool constituting the embodiment shown in Fig. 1; Fig.
FIG. 8 is a usage state showing a state in which a control valve is mounted in the embodiment shown in FIG. 1; FIG.
FIG. 9 is a cross-sectional perspective view showing first and second return flow paths in the embodiment shown in FIG. 1; FIG.
FIG. 10 is a cross-sectional perspective view showing first and second directional flow paths in the embodiment shown in FIG. 1; FIG.
FIG. 11 is a cross-sectional perspective view showing first and second return flow paths in the embodiment shown in FIG. 1; FIG.
12 is a perspective view showing a configuration of another embodiment of the present invention.
13 is an exploded perspective view showing the configuration of the embodiment shown in Fig.
FIG. 14 is a perspective exploded view of the flow setting block and the spool constituting the embodiment shown in FIG. 12; FIG.
15 is a cross-sectional view of a spool constituting the embodiment shown in Fig.

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 numerals even though 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;

As shown in the drawings, the apparatus of the present invention is provided with a main body 10. In this embodiment, the main body 10 has a substantially flat hexahedral shape. Of course, the shape of the main body 10 does not necessarily have to be a hexahedron. At one side of the outer surface of the main body 10, there is a control valve seat portion 12 to which a control valve 80 to be described below is mounted. A control valve fastening hole 13 for fastening the control valve 80 to the main body 10 is formed in the control valve seating portion 12. In this embodiment, four control valve fastening holes 13 are arranged to form a quadrangle. The control valve fastening hole 13 does not penetrate through the main body 10.

A block seat (14) is provided on the other side of the outer surface of the main body (10) where the control valve seat (12) is formed. The block seating part 14 is a part where a flow setting block 42 forming a skeleton of the flow setting part 40 to be described below is seated. The block mounting portion 14 is formed with a block fastening hole 15 so as to have a rectangular shape. The block fastening hole 15 does not penetrate the main body 10.

On the outer surface of the opposite side where the control valve seat portion 12 and the block seat portion 14 are formed, there is a device seating portion 16. The facility seating portion 16 is a portion to which the main body 10 is attached to an actuator or the like for controlling components constituting a facility (not shown) such as a turbine or a boiler. That is, the portion of the apparatus adhered to one side of the equipment is the equipment seating portion 16. A facility fastening hole 17 for fastening the main body 10 to the facility is formed in the facility seating part 16. [ The facility fastening hole 17 is formed through the main body 10.

First passages (20) are formed along the longitudinal direction of the main body (10). The first flow paths 20 start at one end of the main body 10 and are connected to a second valve supply port 28P, a second valve direction port 28A, And extends to the position of the return port 28T. The first flow path 20 includes a first supply flow path 20P, a first direction flow path 20A, and a first return flow path 20T. The first supply passage 20P communicates with a first valve supply port 26P communicating with the control valve 80 to be described below and a second valve supply port 28P communicating with the flow setting block 42 It plays a role. The first directional flow passage 20A communicates with a first valve directional port 26A communicating with the control valve 80 to be described below and a second valve directional port 28A communicating with the flow setting block 42 It plays a role. The first return passage 20T communicates with the first valve return port 26T communicating with the control valve 80 to be described below and the second valve return port 28T communicated with the flow setting block 42 It plays a role.

Reference numeral 22 denotes a first closing plug for blocking one end of the first flow paths 20. Since the first flow paths 20 are opened to the outer surface of the main body 10 because the tool must enter from one side of the main body 10 in order to form the first flow paths 20, 1 Closing plug 22 is used.

Next, the second flow paths 24 are formed in the longitudinal direction of the main body 10. The second flow paths 24 are located at relatively lower positions in the main body 10 than the first flow paths 20. The second flow paths 24 start from the other end of the main body 10 and are connected to the first facility supply port 36P, the first facility direction port 36A, Extends to the position of the return port 36T. The second flow path 24 includes a second supply flow path 24P, a second direction flow path 24B, and a second return flow path 24T. The second supply passage 24P serves to communicate a first facility supply port 36P communicating with the facility side and a second facility supply port 30P communicating with the flow setting block 42. [ The second directional flow path 24A serves to communicate a first facility direction port 36A communicating with the facility side and a second facility direction port 30A communicating with the flow setting block 42. [ The second return passage 24T serves to communicate the first facility return port 36T communicated with the facility side and the second facility return port 30T communicated with the flow setting block 42. [ Reference numeral 25 denotes a second finishing plug for blocking one end of the second flow paths 24. The second closing plug 25 serves the same function as the first closing plug 22.

A first valve supply port 26P for communicating with the control valve 80 is formed in the control valve seat portion 12 of the main body 10. [ The first valve supply port 26P communicates with the first supply passage 20P and opens to the outer surface of the main body 10. [ And communicates with the port of the control valve (80) at a portion opened to the outer surface of the main body (10).

The first valve direction port 26A and the first valve return port 26T are formed in the control valve seat 12 to be opened to the outer surface of the main body 10. The first valve direction port 26A, Is communicated with the first directional flow passage (20A) and the first valve return port (26T) is communicated with the first return flow passage (20T).

A second valve supply port 28P, a second valve direction port 28A and a second valve return port 28T for communicating with the flow setting block 42 are connected to the block seat 14 by the main body 10, As shown in FIG. The second valve supply port 28P is connected to the first supply passage 20P and the second valve direction port 28A is connected to the first directional flow passage 20A and the second valve- And the valve return port 28T communicates with the first return passage 20T. Reference numeral 29 denotes a guide hole into which a guide pin 43 in the flow setting block 42 is inserted.

The second facility supply port 30P, the second facility direction port 30A, the second valve supply port 30P, and the second valve supply port 30P are provided correspondingly to the second valve supply port 28P, the second valve direction port 28A, A facility return port 30T is formed in the block seating portion 14. [ The second equipment supply port 30P, the second equipment direction port 30A, and the second equipment return port 30T communicate with the second flow paths 24, respectively. That is, the second equipment supply port 30P is connected to the second supply flow path 24P, the second equipment direction port 30A is connected to the second direction flow path 24A, and the second equipment return port 30T And communicates with the second return passage 24T.

A sensing port 32 is formed on an outer surface of the body 10 where the second flow path 24 is open. The sensing port 32 communicates with the second facility direction port 30A, as can be seen in FIG. A pressure sensor 34 is mounted on the sensing port 32 to sense the pressure of the pressure fluid flowing through the second facility direction port 30A.

Next, the first equipment supply port 36P, the first equipment direction port 36A, and the first equipment return port 36T are opened in the equipment installation portion 16. The first equipment supply port 36P communicates with the second supply path 24P of the second flow path 24 and the first equipment direction port 36A communicates with the second direction And the first facility return port 36T is communicated with the second return passage 24T. The first equipment supply port 36T, the first equipment direction port 36A, and the first equipment return port 36T communicate with the equipment side to form a path for the pressure fluid.

A flow setting part (40) is mounted on the block mounting part (14) of the main body (10). The flow setting block 42 forms the skeleton of the flow setting portion 40. A guide pin (43) is provided on one side of the outer surface of the flow setting block (42). The guide pin 43 is inserted into the guide hole 29 to guide a position where the block seat 14 is seated on the main body 10.

A spool space (44) is formed in the flow setting block (42). The spool space (44) opens to one surface of the flow setting block (42). The spool space 44 is a cylindrical space and communicates with the first supply passage 20 and the second supply passage 24.

To this end, the flow setting block 42 is provided with a first supply communication port 46P, a first direction communication port 46A, a first return communication port 46T, a second supply communication port 48P, The communication port 48A and the second return communication port 48T are formed correspondingly. The first supply communicating port 46P is communicated with the second supply passage 24P (see FIG. 11), and the first direction communicating port 46A is communicated with the second directional passage 24A , The first return communication port 46T is communicated with the second return flow path 24T (see FIG. 9). The second supply communicating port 48P communicates with the first supply passage 20P (see FIG. 11), and the second direction communicating port 48A communicates with the first directional passage 20A , The second return communication port 48T is communicated with the first return passage 20T (see FIG. 9).

A block through hole (49) is formed to mount the flow setting block (42) to the main body (10). The block through holes 49 are formed through four corners of the upper surface of the flow setting block 42. A cover fastening hole 49 'is formed at four corners of the front surface of the flow setting block 42 where the spool space 44 is opened. A fastener (not shown) for fastening the cover 50 to be described below is fastened to the cover fastening hole 49 '.

A cover (50) is mounted on the front surface of the flow setting block (42). The cover (50) has a spool through hole (52) formed at the center thereof. The spool opening 64 of the spool 60, which will be described below, penetrates the spool through hole 52 and protrudes out of the spool space 44. At the four corners of the cover 50, a cover hole 54 is formed at a position corresponding to the cover engaging hole 49 'of the flow setting block 42.

A stop end 56 is formed at a position corresponding to the edge of the spool through hole 52 in the outer surface of the cover 50. The stop end 56 is formed in a ring shape except for an area of about 90 degrees. The 90 degree region where the stop end 56 is not formed is an area for the operation of the handle 76 to be described below. An opening slit (57) is formed at one side of the stop end (56). The opening slit 57 is a space for installing the stop pin 78 to be described below on the spool arm 64.

In the inner surface of the cover 50, a ring-shaped groove is formed at a position corresponding to the edge of the spool through hole 52, and a bearing 58 is provided. The bearing 58 is a thrust needle bearing. By using the bearing 58, the rotation of the spool 60 described below can be smoothly performed.

A spool (60) is installed in the spool space (44). The configuration of the spool 60 is well shown in Figs. 6 and 7. Fig. The spool 60 is largely composed of a spool body 62 and a spool arm 64. The spool body 62 is located in the spool space 44 and the spool arm 64 is fixed to the cover 50 And protrudes outward.

The spool body 62 has a cylindrical shape, and its outer surface is in close contact with the inner surface of the spool space 44. A seal groove 65 is formed in the spool body 62 at a position adjacent to the spool arm 64. A seal is provided in the seal groove 65 to closely contact the inner surface of the spool space 44 to prevent the pressure fluid from leaking.

A supply communication path 66P, a communication directional communication path 66A, and a return communication path 66T are formed along one side of the outer surface of the spool body 62. The supply communication path 66P serves to communicate the first supply communication port 46P and the second supply communication port 48P. The directional communication path 66A serves to communicate the first directional communication port 46A and the second directional communication port 48A and the return communication path 66T serves to communicate with the first return communication port 46T, And serves to communicate the second return communication port 48T.

The first bypass flow path 68 is formed in a groove shape at a position about 90 degrees from the supply communication path 66P and the direction communication path 66A. The first bypass passage 68 connects the first supply communication port 46P and the first direction communication port 46A to prevent the pressure fluid from being transmitted to the control valve 80 in an emergency. That is, the pressure fluid delivered through the second supply passage 24P is not transmitted to the control valve 80 through the first supply passage 20P, and the first supply communicating port 46P, And is transferred to the equipment side through the second directional flow path 24A.

On the other hand, a second bypass passage 68 'is formed in a groove shape on the opposite side of the first bypass passage 68 from the spool body 62. The second bypass flow path 68 'and the first bypass flow path 68 communicate with each other through the first through hole 70 and the second through hole 70', respectively. When the pressure fluid is supplied to the first bypass flow path 68, the pressure fluid is supplied to the second bypass flow path 68 'through the first through hole 70 or the second through hole 70' . This is to cancel the moment generated when the pressure fluid is introduced since the first bypass flow path 68 is at a position spaced apart from the rotation center axis of the spool body 62. That is, since the first bypass flow path 68 and the second bypass flow path 68 'are formed at positions that can generate moments opposite to each other with respect to the rotation center axis of the spool body 62, The pressure fluid is supplied to the path flow path 68 and the second bypass flow path 68 'at substantially the same time, thereby canceling the moment generated by the pressure fluid.

Reference numeral 72 denotes an exhaust hole for allowing the air in the spool space 44 to pass through when the spool 60 is installed in the spool space 44 so that the spool 60 can be easily inserted into the spool space 44 .

A handle hole (72) is formed through the spool arm (64) in a transverse direction. The handle hole 72 is provided with a handle 76 to be described later. A pin hole 74 is formed adjacent to the handle hole 72. The pin hole 74 is provided with a stop pin 78.

A handle 76 is provided in the handle hole 72, and the handle 76 is in the shape of a bar. The handle 76 is rod-shaped so that it can provide a force for the operator to rotate without a separate tool. A fastening hole 77 is formed at one side of the handle 76. A fastener (77 ') is inserted into the fastening hole (77) through the spool arm (64) from the front end thereof.

The pin hole 74 is provided with a stop pin 78. The stop pin 78 serves to regulate the rotation of the handle 76. The stop pin 78 penetrates through the pin hole 74 and protrudes outward to be supported by the stop end 56 so that the rotation range of the handle 76 is limited to 90 degrees. The stop pin 78 is inserted and fixed to the pin hole 74 through the opening slit 57. A screw portion is provided at the rear end of the stop pin 78, and the screw portion is fastened to the screw portion inside the pin hole 74 and fixed.

A control valve (80) is mounted on the control valve seat (13) of the main body (10). The control valve 80 serves to control the flow of the pressure fluid to an actuator or the like of the facility. As an example of the control valve 80, there is a solenoid valve.

On the other hand, Fig. 12 to Fig. 15 show another embodiment of the present invention. This embodiment can be used, for example, in a boiler of a power generation facility, and the above embodiment can be installed and used in a turbine. The present embodiment is also the same as the above embodiment, and therefore, the description of this embodiment will only describe the important parts.

In this embodiment, the main body 110 has a hexahedral shape. Channels are formed in the body 110, and a plurality of ports are opened to the outer surface.

First, a plurality of control valve seating portions 112 are formed on the outer surface of one side of the main body 110. A plurality of control valves (not shown) may be mounted on the main body 110 of the present embodiment. That is, a total of three control valves may be mounted on the main body 110. For reference, a control valve seat 112 'is also formed on one side surface of the flow setting block 142, which will be described below. A control valve (not shown) is also mounted here. The control valve seating portion 112 of the main body 110 is formed with only the return port and the directional port and the control valve seating portion 112 'formed in the flow setting block 142 is provided with the input port, Port are all formed.

A block seat 114 is mounted on the outer surface of the main body 110 and is mounted on the outer surface adjacent to the outer surface of the control valve seat 112 on which the flow setting block 142 is mounted. A first valve supply port 126P, a first valve return port 126T, and a first valve direction port 126A are formed in the block seat 114.

A second valve direction port 128A and a second facility direction port 130A are formed on the other side of the block seating part 114. [ The second valve direction port 128A and the second facility direction port 130A communicate with each other in the spool space 144 described below to form a flow path that is connected to each other in the normal state.

The first supply port 136P, the first return port 136T, and the first direction port 136A of the main body 110 are opened to the outside. Each of them is connected to a hose (not shown) to allow the pressure fluid to flow. For example, pressure fluid from an external source is delivered to the first supply port 136P through the hose. The pressure fluid is supplied through the first valve supply port 126P to the spool space 144, which will be described below. Reference numeral 139 denotes a flow control valve for regulating the flow rate flowing through the actuator to be controlled.

The flow setting unit 140 is installed in the block seat 114 of the main body 110. The flow setting unit 140 is different from the flow setting unit 40 of the embodiment described above, . That is, when the maintenance of the control valve is required, the pressure setting unit 140 causes the pressure fluid to flow from the pressure path to the directional path That is, the pressure fluid entering the first supply port 136P, is transmitted to the facility side through the hose connected to the first direction port 136A. Therefore, it is possible to remove and replace the control valves mounted on the control valve seating portions 112 and 112 '.

The flow setting block 142 forms the skeleton of the flow setting unit 140. A spool space 144 is formed in the flow setting block 142. The spool space 144 is opened to one side of the flow setting block 142. And a first supply passage 146P is connected to communicate with the spool space 144. [ The first supply passage 146P is a path through which the pressure fluid flowing through the first supply port 136P and the first valve supply port 126P of the main body 110 flows toward the spool space 144. [

14, a valve supply passage 148P is formed to communicate with the spool space 144. As shown in FIG. The valve supply passage 148P communicates with a valve supply port 148'P (see FIG. 13) opened to the control valve mounting portion 112 ', and normally supplies pressure fluid to the control valve.

A first direction communication path 146A is formed so as to face the spool space 144 when the valve supply path 148P is opened. The first directional communication path 146A communicates with the first directional port 136A through the second valve directional port 128A.

A second directional communication passage 148A is formed so as to open to the spool space 144 and the flow setting block 142 side by side with the first direction communication passage 146A. The second directional communication passage 148A communicates with the second valve directional port 128A of the main body 110. [

A spool body 162 of the valve spool 160 is located in the spool space 144 of the flow setting block 142. The spool arm 164 of the valve spool 160 protrudes out of the spool space 144. Only the spool arm 164 protrudes out of the spool space 144 and the spool arm 164 is rotated smoothly is the same as the configuration of the above embodiment.

A seal groove 165 is formed in the spool body 162 to prevent the pressure fluid from leaking. And a supply port 166P is formed so as to extend in the longitudinal direction inside the spool body 162. [ The supply port 166P communicates with the first supply passage 146P. A valve supply port 166'P is formed in the lateral direction of the spool body 162 to communicate with the supply port 166P. The valve supply port 166'P is normally communicated with the valve supply passage 148P communicated with the spool space 144 to allow the pressure fluid to be transmitted to the control valve.

A first direction communication path 146A opened to the spool space 144 and a second direction communication path 148A are connected to one side of the spool body 162 so that the fluid is normally communicated with the first direction communication path 146A, And the second directional communication passage 148A.

Meanwhile, a bypass flow path 168 is formed in the spool body 162 so as to communicate with the supply port 166P. The bypass passage 168 is in communication with the supply port 166P and communicates with the first directional communication passage 146A when the apparatus of the present invention is used for replacement of the control valve, And is supplied to the first direction port 136A through the flow path 146P.

A handle 176 is mounted on the spool arm 164 of the spool 160. Other arrangements other than the handle 176 are the same as those of the above embodiment. For example, the handle 176 may be operated only within a certain section, or a thrust needle bearing may be used to smooth the operation of the spool 160.

Hereinafter, a bypass / blocking device for replacing a control valve according to the present invention having the above-described configuration will be described.

First, the operation of the device according to the present invention will be described based on the embodiment shown in FIG. 1 to FIG. 8 shows a state in which the control valve 80 is mounted on the control valve seat portion 12. As shown in Fig. 8, the main body 10 is mounted at a position where the control valve 80 is originally mounted. That is, the first equipment supply port 36P, the first equipment direction port 36A, and the first equipment return port 36T of the main body 10 are mounted in the equipment so as to communicate with corresponding ports of the equipment.

8, the supply communication path 66P, the direction communication path 66A, and the return communication path 66T of the spool 60 are connected to each other, As shown in Fig. 9, the first return flow path 20T and the second return flow path 24T, the first direction flow path 20A and the second direction flow path 24A, as shown in Fig. 10, The first supply passage 20P and the second supply passage 24P communicate with each other, as shown in Fig.

11, the pressure fluid delivered from the pressure fluid supply source connected to the facility through the first supply passage 20P passes through the spool space 44 and goes to the second supply passage 24P . The pressure fluid passes through the second supply passage 24P and is supplied to the control valve 80 through the first valve supply port 26P. By the control of the control valve 80, (26T) and the first valve direction port (26A).

The pressure fluid delivered to the first valve return port 26T flows through the first return path 20T, the spool space 44, and the second return path 24T, To the pressure fluid supply source.

The pressure fluid delivered to the first valve direction port 26A flows through the first directional flow path 20A, the spool space 44, and the second directional flow path 24A, as shown in Fig. 10, And is supplied for control of the facility through a directional flow path.

On the other hand, when the control valve 80 fails, the pressure fluid should not be supplied to the control valve 80 side. To this end, the first supply passage 20P and the second supply passage 24P should be disconnected from the spool space 44 through the supply communication passage 66P. In addition, the pressure fluid supplied through the second supply passage 24P must be transferred to the second directional flow passage 24A and supplied to the apparatus without passing through the control valve 80. [

To this end, the handle 76 is rotated 90 degrees clockwise in the state of FIG. The rotation of the handle 76 causes the first bypass flow path 68 to communicate the second supply flow path 24P and the second direction flow path 24A with each other. Therefore, the pressure fluid supplied through the second supply passage 24P can be bypassed directly to the second directional flow passage 24A. In this case, the pressure fluid is not transmitted to the side where the control valve 80 is mounted, that is, to the first supply passage 20P. Therefore, even if the control valve 80 is removed, the pressure fluid does not leak, and the equipment can be normally operated.

When the operator rotates the handle 76, the spool body 62 is brought into close contact with the inner surface of the cover 50 by the pressure inside the spool space 44, and the bearing, which is the thrust needle bearing, (58) is provided to rotate the handle (76), i.e., the spool (60), in spite of the pressure of the pressure fluid.

The spool 60 needs to be rotated only by a predetermined angle. For this purpose, the stop pin 78 is hooked on the other side of the stop end 56. That is, even if an operator tries to rotate the spool 60 further by applying a force to the handle 76, the stop pin 78 is hooked on the stop end 56 and is no longer rotated.

In this state, the first bypass flow passage 68 communicates the first supply communication port 46P and the first direction communication port 46A. Therefore, the pressure fluid delivered through the first supply communication port 46P can be directly transferred from the first bypass flow path 68 to the first direction communication port 46A.

On the other hand, the first bypass flow path 68 is offset from the rotational center axis of the spool 60. When the pressure fluid is supplied to the first bypass flow path 68 through the first supply communication port 46P, a moment for rotating the spool body 62 is generated. However, since the second bypass flow path 68 'is formed on the opposite side of the first bypass flow path 68 through the first through hole 70 and the second through hole 70', the spool body 62, Can be canceled. Therefore, even if the pressure fluid is continuously supplied to the first bypass flow path 68, the spool 60 is rotated to block the original state shown in FIG.

The handle 76 is rotated clockwise by 90 degrees so that the second supply passage 24P and the second directional passage 24A are communicated with each other to prevent the pressure fluid from being supplied to the control valve 80, Since the pressure fluid is directly supplied to the facility through the second directional flow passage 24A, the replacement of the control valve 80 can be performed without stopping the operation of the facility for a predetermined period of time You can proceed. When the control valve 80 is replaced, the handle 76 is rotated 90 degrees counterclockwise again so that the stop pin 78 is hooked to one side of the stop end 56, 80 so that the pressurized fluid is transferred through the path as described above, so that the facility can be operated under the control of the control valve 80.

Next, operation of the embodiment shown in Fig. 12 through Fig. 15 will be described. In this embodiment, three control valves are mounted on the main body 110, and at least one control valve may be mounted on the flow setting part 140. [ A hose may be connected to the first supply port 136P, the first return port 136T, the first directional port 136A, and the like to allow the flow of the pressure fluid.

In this embodiment, pressure fluid is normally supplied through the first supply port 136P, and the third supply port 146'P, the first supply flow path 146P, the spool space 144, the spool The control valve seated on the control valve seat portion 112 'of the flow setting portion 140 through the supply port 166P of the valve body 160, the valve supply port 166'P, and the valve supply passage 148P, .

However, when the control valve needs to be replaced, the handle 176 is rotated to rotate the spool 160 as shown in FIG. The valve supply port 166'P is blocked by the inner surface of the spool space 144 by the rotation of the spool 160 by 90 degrees, And communicates with the first direction communication path 146A. Therefore, the pressure fluid flowing through the supply port 166P does not flow to the valve supply port 166'P and flows through the bypass flow path 168 to the first direction communication path 146A, The directional port 130A, and the first directional port 136A.

Since the pressure fluid is not supplied to the side of the control valve mounted on the control valve mounting portion 112 ', the mounted control valve can be removed and replaced. Since the pressure fluid is not supplied to the control valve seat 112 of the body 110, the control valve can be removed and replaced.

After the failed control valve is replaced, the handle 176 is rotated counterclockwise by 90 degrees in the counterclockwise direction to return the handle 176 to its original state so that the pressure fluid is supplied to the control valve mounted on the control valve mounting portion 112 ' So that normal operation is performed.

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.

10: main body 12: control valve seat portion
13: Control valve fastening hole 14: Block seat part
15: block fastening hole 16:
17: Equipment fastening hole 20: First flow path
20P: first supply passage 20A:
20T: first return passage 22: first finishing plug
24: second flow path 24P: second supply flow path
24A: second direction flow path 24T: second return flow path
25: second closing plug 26P: first valve supply port
26A: first valve direction port 26T: first valve return port
28P: second valve supply port 28A: second valve direction port
28T: Second valve return port 29: Guide ball
30P: second facility supply port 30A: second facility direction port
30T: second facility return port 32: detection port
34: pressure sensor 36P: first facility supply port
36A: first facility direction port 36T: first facility return port
40: Flow setting part 42: Flow setting block
44: spool space 46P: first supply communication port
46A: first direction communicating port 46T: first return communicating port
48P: second supply communication port 48A: second direction communication port
48T: second return communication port 49: block through hole
50: cover 52: spool opening
54: cover ball 56: stop stage
57: opening slit 58: bearing
60: spool 62: spool body
64: spool arm 65: seal groove
66P: Supply communication path 66A: Direction communication path
66T: return communication path 68: first bypass passage
68 ': second bypass passage 70: first through hole
70 ': Second through hole 72: Exhaust hole
74: pin hole 76: handle
77: fastening hole 78: stop pin
80: control valve 110:
112: Control valve seat part 112 ': Control valve seat part
114: a block seat part 126P: a first valve supply port
126A: first valve direction port 126T: first valve return port
128A: second valve direction port 130A: second facility direction port
136P: first supply port 136A: first direction port
136T: first return port 140: flow setting section
142: Flow setting block 144: Spool space
146P: first supply flow path 146A: first direction communication path
146'P: Third supply port 148P: Valve supply passage
148A: second direction communication passage 160: valve spool
162: spool body 164: spool arm
165: seal groove 166P: supply port
166'P: valve supply port 166A: direction port communicating path
168: Bypass flow path 176: Handle

Claims

A pressure fluid is normally supplied to operate the control valve and a pressure fluid is supplied to the actuator or the cylinder for the operation of the cylinder during the exchange of the control valve. 1. A bypass / blocking device for a control valve replacement which directly supplies,
A main body having a control valve seat and a block seat formed on an outer surface of the actuator and the cylinder,
A flow setting block is mounted on the block seat portion of the main body, a spool is installed in the spool space in the flow setting block, and the spool is rotated at a predetermined angle with the handle to transmit the pressure fluid, which is transmitted through the flow path of the main body, Or a flow setting section for directly transmitting the pressure fluid to the actuator or the cylinder side
Wherein a first supply passage, a first direction passage, and a first return passage, which are a first passage for transferring a pressure fluid between the control valve and the flow setting block, are formed in the main body, A second supply passage, a second direction passage, and a second return passage, which are a second passage for transferring the pressure fluid between the outside of the main body and the flow setting block at different heights from the passage, The second flow paths are respectively communicated with the spool space of the flow setting block so that the first flow path and the second flow path are communicated by the spool so as to correspond to each other or the second supply flow path is communicated with the second flow path, Bypass / blocking device.

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2. The spool according to claim 1, wherein a spool installed in the spool space inside the flow setting block protrudes through a cover mounted at a spool space entrance of the flow setting block to protrude a spool arm on which the handle is installed, Wherein a thrust needle bearing is provided to allow the pressure fluid to rotate relative to the cover even if the pressure of the pressure fluid acts on the spool.

The handle of claim 3, wherein a front end of the cover is provided with a stop end for limiting the angle at which the handle is rotated, and the handle is provided with a stop pin for hooking the stop end, For limiting the rotation angle of the handle by the control valve.

The spool according to any one of claims 1, 3 and 4, wherein the spool includes a spool body located in the spool space and a spool arm extending outwardly of the spool space, A communication path for communication between the first flow path and the second flow path and a first bypass flow path for bypassing the pressure fluid from the second supply flow path to the second direction flow path during replacement of the control valve are formed Bypass / blocking device.

6. The spool according to claim 5, further comprising a second bypass flow path communicating with the first bypass flow path through the first and second through holes and formed opposite to the rotation center axis of the spool, A bypass / blocking device for the replacement of a control valve that compensates for the moment generated by the pressure fluid supplied through the supply passage.