KR101237075B1

KR101237075B1 - Opening and closing valve for descaler

Info

Publication number: KR101237075B1
Application number: KR1020100094391A
Authority: KR
Inventors: 안병준; 이순현
Original assignee: 현대제철 주식회사
Priority date: 2010-09-29
Filing date: 2010-09-29
Publication date: 2013-02-25
Also published as: KR20120032849A

Abstract

The present invention relates to a descaler opening / closing valve, and more particularly, to a descaler opening / closing valve that reduces an impact generated in a flow path of a working fluid when a descaling process is started or terminated.
According to the present invention, there is provided a vacuum cleaner comprising: a body having a first hole portion and a second hole portion through which a working fluid passes; A plunger movably installed in the main body and opening / closing a flow path between the first hole portion and the second hole portion; And a flow regulator for regulating an amount of the working fluid discharged from the main body.

Description

[0001] OPENING AND CLOSING VALVE FOR DESCALER [0002]

The present invention relates to a descaler opening / closing valve, and more particularly, to a descaler opening / closing valve that reduces an impact generated in a flow path of a working fluid when a descaling process is started or terminated.

Typical steelmaking consists of a steelmaking process to produce molten iron, a steelmaking process to remove impurities from molten iron, a casting process to solidify the liquid iron, and a rolling process to make iron steel or wire.

The process of making pig iron, which is the previous step in the process of making steel by iron ore, is called zeolite and the process of making steel by pig iron is called steelmaking.

The casting process is a process of injecting liquid molten steel into a mold and then cooling and solidifying it while passing through a continuous casting machine to continuously produce an intermediate material such as a slab or a bloom.

In this process, the bloom is transformed into a billet through a steel billet mill and processed into a wire billet through a wire mill.

Further, the slab is produced as a heavy plate through a plate rolling mill or as a hot rolled coil or a hot rolled steel plate while passing through a hot rolling mill.

During the rolling process, a high-pressure working fluid sprayed from the descaler is sprayed onto the surfaces of the billets or slabs to remove scales generated on the billet or slab surface.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

An object of the present invention is to provide a descaler opening / closing valve that reduces the impact generated in the flow path of the working fluid when the descaling process is started or terminated.

According to an aspect of the present invention, there is provided a vacuum cleaner comprising: a main body having a first hole portion and a second hole portion through which a working fluid passes; A plunger movably installed in the main body and opening / closing a flow path between the first hole portion and the second hole portion; And a flow regulator for regulating an amount of the working fluid discharged from the main body.

In addition, the flow rate regulator may include: a regulating tube provided in the second hole and having an inlet and an outlet; And an adjusting member movably installed in the adjusting pipe and opening / closing a flow path between the inlet and the outlet.

The control tube may be formed in a pipe shape, and the discharge port may be formed on the circumference of the discharge tube, and a projection may be formed between the discharge port and the discharge port.

In addition, a thread is formed on the circumferential surface of the control member and is coupled to the control tube.

In addition, an inner surface of the adjusting member is formed with an inclined surface that is in close contact with the protruding portion, and a rotation groove is formed at an outer end of the adjusting member, into which the jig is inserted to rotate the adjusting member.

Since the descaler opening / closing valve according to the present invention reduces the moving speed of the plunger for determining whether or not the working fluid is supplied, it is possible to prevent the opening operation and the closing operation of the flow passage through which the working fluid passes, There is an advantage that the impact caused by the difference can be reduced.

1 is a cross-sectional view illustrating a descaler opening / closing valve provided with a pressure regulating device according to a first embodiment of the present invention.
2 is a cross-sectional view illustrating a descaler opening / closing valve according to a first embodiment of the present invention.
3 is an exploded perspective view showing a gap adjusting portion of the descaler opening / closing valve according to the first embodiment of the present invention.
4 is a cross-sectional view illustrating a descaler opening / closing valve according to a second embodiment of the present invention.
5 is an exploded perspective view showing a gap adjusting portion of the descaler opening / closing valve according to the second embodiment of the present invention.
6 is a cross-sectional view illustrating a descaler opening / closing valve according to a third embodiment of the present invention.
FIG. 7 is an operational state diagram showing a gap adjusting portion of the descaler opening / closing valve according to the third embodiment of the present invention.
8 is a cross-sectional view illustrating a descaler opening / closing valve according to a fourth embodiment of the present invention.
Fig. 9 is an operational state diagram showing a gap adjusting portion of the descaler opening / closing valve according to the fourth embodiment of the present invention.

Hereinafter, an embodiment of a descaler opening / closing valve according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a cross-sectional view of a descaler opening / closing valve provided with a pressure regulating device according to a first embodiment of the present invention, FIG. 2 is a sectional view of a descaler opening / closing valve according to a first embodiment of the present invention, 3 is an exploded perspective view showing a gap adjusting portion of the descaler opening / closing valve according to the first embodiment of the present invention.

1 to 3, a descaler opening / closing valve according to an embodiment of the present invention includes a valve body 110 through which a working fluid for descaling operation is formed in which a suction port 112 and a discharge port 114 are formed, An opening and closing member 130 that is movably installed in the valve body 110 and opens and closes a flow path between the suction port 112 and the discharge port 114 and a determination unit that determines whether or not the drive fluid for moving the opening and closing member 130 is supplied And a switch unit 170 for switching the display unit.

When the driving fluid is supplied into the valve body 110 and the opening and closing member 130 is pressed by the operation of the switch unit 170, the opening and closing member 130 closes the flow path between the inlet 112 and the outlet 114 The supply of the working fluid for descaling operation is stopped.

In contrast, when the driving fluid is discharged to the outside of the valve body 110 by the operation of the switch unit 170, the pressure for pressing the opening / closing member 130 is released, Is opened.

The working fluid flowing into the valve body 110 through the inlet port 112 is discharged through the discharge port 114 through the gap between the valve body 110 and the opening and closing member 130, And the descaling process is performed.

A suction port 112 is formed at one side of the valve body 110 and a discharge port 114 is formed at the other side of the valve body 110. Since the suction port 112 and the discharge port 114 are spaced apart from each other, And the discharge port 114 are formed in a vertical direction.

When the opening and closing member 130 is slidably installed in the flow path between the inlet 112 and the outlet 114 and the lower end of the opening and closing member 130 is inserted into the opening and closing hole 116 formed in the valve body 110 The euro is closed.

A space forming the pressing portion 118 is formed between the upper end of the opening and closing member 130 and the valve body 110 and an opening and closing flow path 119 extending from the pressing portion 118 to the outside of the valve body 110 is formed .

A switch block 150 is provided on the outer wall of the valve body 110 opposite to the switching valve 119 to form an extended flow passage 156 communicating with the switching valve 119. The switch block 150 is provided with a supply passage 152 and a discharge passage 154 are formed.

The switch unit 170 includes a switch body 172 in which a switch channel 174 for communicating the extension channel 156 with the supply channel 152 and the discharge channel 154 is formed, A guide member 176 installed to selectively close the supply passage 152 or the discharge passage 154 and a lever portion 178 for moving the guide member 176.

When the guide member 176 is moved toward the discharge passage 154 by the operation of the lever portion 178, the supply passage 152 is communicated with the extension passage 156 and the opening and closing passage 119, and the discharge passage 154 is closed do.

Conversely, when the guide member 176 is moved toward the supply passage 152 by the operation of the lever portion 178, the discharge passage 154, the extension passage 156 and the opening / closing passage 119 are communicated with each other, Is closed.

Since the pressure regulating device 100 for regulating the flow rate of the driving fluid is provided in the supply passage 152 and the discharge passage 154, the flow rate of the driving fluid supplied to the pressing portion 118 along the supply passage 152 is adjusted The flow rate of the driving fluid discharged from the pressurizing portion 118 along the discharge passage 154 is adjusted.

Therefore, when the supply of the driving fluid to the pressing portion 118 is started by the operation of the lever portion 178 or the driving fluid is discharged from the pressing portion 118, the flow rate of the driving fluid is adjusted by the pressure regulating device 100 It is possible to prevent the opening and closing member 130 from moving faster than necessary.

Particularly, when the descaling process is started, since the pressure difference between the suction port 112 side and the discharge port side 114 is large around the opening / closing member 130, And a large impact may be generated in the flow path, which can be reduced by the pressure regulating device 100.

The pressure regulating device 100 includes a main body 10 having a first hole 12 and a second hole 14 through which a working fluid is passed and a first hole 12 movably installed in the main body 10, A plunger 20 for opening and closing the flow path 16 between the first hole 14 and the second hole 14 and a gap adjusting part 30 for adjusting the distance between the flow path 16 and the plunger 20.

When the descaler opening / closing valve is opened, the guide member 176 is lifted along the switch channel 174 so that the opening / closing flow path 119, the extension flow path 156 and the discharge flow path 154 are communicated with each other and the plunger 20 is moved The flow path 16 between the first hole portion 12 and the second hole portion 14 is opened.

The driving fluid that has been filled in the pressurizing portion 118 to maintain the closed state of the opening and closing member 130 is discharged to the outside through the opening and closing passage 119, the extending passage 156, the discharge passage 154, the first hole portion 12, 2 hole portion 14 and is discharged.

Closing member 130 is lifted so that the lower end of the opening and closing member 130 is separated from the opening and closing hole portion 116 and the opening and closing hole portion 116 and the opening and closing member 130 are separated from each other as the driving fluid is discharged and the pressure of the pressing portion 118 is lowered. A working fluid supplied through the suction port 112 is injected through the discharge port 114 and the scaling process proceeds.

At this time, since the gap between the plunger 20 and the first hole 12 is not increased more than necessary by the gap adjusting part 30, the flow rate of the driving fluid discharged through the pressure adjusting device 100 is small It does not increase beyond politics.

Accordingly, since the driving fluid discharged from the pressurizing portion 118 is discharged at a predetermined speed or lower, the opening and closing member 130 is rapidly raised, and the impact applied to the valve body 110 and the flow path is reduced.

Since the gap adjusting part 30 includes the ring member 32 installed in the first hole 12, when the ring member 32 is inserted into the inner surface of the first hole 12, the first hole 12 and the plunger 20 Is narrowed.

Therefore, the moving speed of the driving fluid flowing into the main body 10 through the first hole 12 is maintained at a predetermined speed or less.

The ring member 32 is formed with a thread 34 coupled to the first hole 12 and coupled to the thread formed inside the first hole 12 so that the ring member 32 The operator can vary the position of the ring member 32 while rotating the ring member 32. [

The distance between the ring member 32 and the plunger 20 becomes narrow and the ring member 32 is disposed outside the first hole portion 12 by disposing the ring member 32 deep inside the first hole portion 12 The distance between the ring member 32 and the plunger 20 becomes wider.

Accordingly, the operator can adjust the amount of the driving fluid flowing through the first hole portion 12 while rotating the ring member 32.

An operation groove 36 is formed in the outer wall of the ring member 32 to allow the ring member 32 to be rotated so that a tool such as a jig or a wrench can be inserted into the operation groove 36 So that the ring member 32 can be easily rotated.

A step 38 is formed on the rim of the ring member 32 and a step is formed in the first hole 12 opposed to the step 38. [

When the jaw portion 38 is brought into close contact with the step 12a when the ring member 32 is rotated and the ring member 32 is inserted into the first hole portion 12, the ring member 32 is no longer in contact with the first hole portion 12 So that the ring member 32 and the plunger 20 can be prevented from interfering with each other.

The operation of the descaler opening / closing valve according to an embodiment of the present invention will be described below.

First, when the descaling process is started, the external force that presses the guide member 176 by the operation of the lever portion 178 is eliminated, so that the guide member 176 is moved upward by the restoring force of the elastic portion 179, (119) and the discharge passage (154) are communicated with each other.

The driving fluid filled in the pressurizing portion 118 is discharged through the opening / closing flow path 119, the extension flow path 156, the switch flow path 174 and the discharge flow path 154, so that the pressure of the pressurizing portion 118 is lowered .

When the pressure of the pressing portion 118 is lowered, the external force that presses the opening and closing member 130 downward is weakened, so that the opening and closing member 130 rises and a gap is formed between the opening and closing hole portion 116 and the opening and closing member 130 .

Accordingly, the working fluid flowing through the suction port 112 is moved through the discharge opening 114 through the opening / closing hole 116, and then is sprayed onto the workpiece to perform the descaling process.

The driving fluid discharged along the discharge flow passage 154 passes through the first hole portion 12 and passes through the gap between the main body 10 and the plunger 20 and is discharged through the second hole portion 14. The ring member 32 It is possible to prevent an abrupt increase in the inflow speed of the drive fluid flowing through the first hole portion 12. [

Therefore, the effect of lowering the speed of the driving fluid discharged from the pressing portion 118 is generated, thereby preventing the opening / closing member 130 from rising more rapidly than necessary.

The opening / closing member 130 is moved slowly below the predetermined speed to perform the opening operation of the opening / closing valve 130, so that the impact caused by the pressure difference between the front and rear sides of the opening and closing member 130 can be reduced.

FIG. 4 is a cross-sectional view illustrating a descaler opening / closing valve according to a second embodiment of the present invention, and FIG. 5 is an exploded perspective view illustrating a gap adjusting portion of a descaler opening / closing valve according to a second embodiment of the present invention.

Referring to FIGS. 1, 4 and 5, a descaler opening / closing valve according to a second embodiment of the present invention includes a main body 10 (see FIG. 1) in which a first hole 12 and a second hole 14, A plunger 20 movably installed in the main body 10 for opening and closing the flow path 16 between the first hole 12 and the second hole 14 and a plunger 20 for moving the flow path 16 and the plunger 20, And a pressure difference between the front flow path 16a of the plunger 20 and the rear flow path 16b of the plunger 20 to adjust the position of the gap adjusting part 30 And a variable portion 50 for varying the frequency.

The variable portion 50 is actuated by the pressure of the high driving fluid at the initial stage when the driving fluid flows into the main body 10 through the first hole portion 12 so that the gap adjusting portion 30 is located inside the first hole portion 12 The gap adjusting part 30 is moved to the outside of the first hole part 12 by the operation of the variable part 50 when the pressure is lowered while the inflow of the driving fluid continues.

The variable portion 50 moves the gap adjusting portion 30 according to the pressure change of the driving fluid flowing into the main body 10 through the first hole portion 12. When the pressure of the driving fluid is high, The gap adjusting unit 30 is moved such that the gap between the plunger 20 and the gap adjusting unit 30 is narrowed.

When the pressure of the driving fluid is low, the gap adjusting part 30 is moved outside the first hole part 12 so that the gap between the plunger 20 and the gap adjusting part 30 is widened by the operation of the variable part 50 .

The gap adjusting portion 30 includes a ring member 32 provided in the first hole portion 12 and is provided so as to be movable inward or outward of the first hole portion 12 unlike the first embodiment.

The variable portion 50 includes a fixing member 52 which is press-fitted into the first hole portion 12 and prevents the ring member 32 from being separated outwardly of the first hole portion 12, And an elastic member (54) interposed between the first and second elastic members (32).

The ring member 32 is inserted so that the elastic member 54 is inserted into the first hole portion 12 and the elastic member 54 is interposed between the first hole portion 12 and the ring member 32, The fixing member 52 is press-fitted into the first hole 12 so as not to be detached from the first hole 12.

A step portion 12a is formed in the first hole portion 12 opposed to the step portion 38 and an elastic portion is formed between the step portion 38 and the step portion 12a. Member 54 is interposed.

The fixing member 52, which is shaped like a pipe and press-fitted into the first hole 12, is constrained to the jaw portion 38 of the ring member 32 because the outer end is bent inward.

The jaw portion 38 is formed with a fixing groove portion 38a into which the elastic member 54 is inserted and a seat groove portion 12b into which the elastic member 54 is inserted is formed in the stepped portion 12a.

When the plunger 20 is lifted and the flow path 16 between the first and second hole portions 12 and 14 is opened, a high-pressure driving fluid flows into the main body 10 through the first hole portion 12 At this time, since the elastic member 54 is compressed by the pressure of the driving fluid, the ring member 32 is moved into the first hole 12.

When the ring member 32 is moved to the inside of the first hole 12, the distance between the plunger 20 and the first hole 12 becomes narrow, The amount of the fluid becomes small.

Accordingly, since the discharging speed of the driving fluid discharged from the pressurizing portion 118 through the discharge passage 154 is slowed down, the opening speed of the descaler opening / closing valve is reduced to reduce the impact generated in the valve body 110 and the flow passage.

The pressure difference between the first hole portion 12 and the second hole portion 14 is reduced so that the pressure of the driving fluid flowing into the main body 10 through the first hole portion 12 is lowered do.

The ring member 32 is moved to the outside of the first hole 12 by the restoring force of the elastic member 54 so that the distance between the plunger 20 and the first hole 12 gradually widens, .

While the operation of opening the flow path 16 between the first hole portion 12 and the second hole portion 14 as described above is performed in accordance with the pressure change of the drive fluid flowing through the first hole portion 12, 32 are moved to the inside or outside of the first hole 12 to adjust the distance between the plunger 20 and the first hole 12.

FIG. 6 is a cross-sectional view illustrating a descaler opening / closing valve according to a third embodiment of the present invention, and FIG. 7 is an operational state diagram illustrating a gap adjusting portion of the descaler opening / closing valve according to the third embodiment of the present invention.

Referring to FIGS. 1, 6 and 7, a descaler opening / closing valve according to a third embodiment of the present invention includes a main body 10 having a first hole 12 and a second hole 14 through which a working fluid passes, A plunger 20 movably installed in the main body 10 for opening and closing a flow path 16 between the first hole 12 and the second hole 14, And a flow control unit 70 for controlling the flow rate of the fluid.

When the plunger 20 is moved and the flow path 16 between the first and second holes 12 and 14 is opened, the driving fluid flows into the main body 10 through the first hole 12, Is discharged to the outside of the main body (10) through the hole (14), and the flow rate of the driving fluid discharged by the flow rate regulator (70) is regulated.

Accordingly, the moving speed of the driving fluid moving along the discharge flow path 154 is maintained at a predetermined speed or lower, so that the opening / closing member 130 is slowly raised.

The flow rate regulator 70 includes an adjusting tube 72 installed in the second hole 14 and having an inlet port 72a and an outlet port 72b formed therein and an inlet port 72a movably installed in the adjusting tube 72, And an adjusting member 74 for opening and closing a flow path between the discharge port 72b and the discharge port 72b.

When the worker moves the adjusting member 74 to reduce the cross-sectional area of the flow path between the inlet port 72a and the outlet port 72b, the amount of the driving fluid discharged through the second hole portion 14 is reduced, The moving speed of the driving fluid discharged from the pressing portion 118 is reduced.

The control tube 72 is formed in a pipe shape and a discharge port 72b is formed on the peripheral surface and a protrusion 72c is formed between the discharge port 72a and the discharge port 72b.

The flow path between the inlet port 72a and the outlet port 72b becomes narrower when the adjusting member 74 is inserted into the adjusting pipe 72 and the distance between the adjusting member 74 and the protruding portion 72c becomes narrow, 74 is moved to the outside of the control tube 72, the distance between the control member 74 and the protrusion 72c is widened, and the flow path between the inlet port 72a and the outlet port 72b is widened.

A screw portion 78a is formed on the circumferential surface of the adjusting member 74 so as to be coupled to a thread formed on the inner wall of the adjusting tube 72. When the adjusting member 74 is rotated in one direction, 72, and the adjustment member 74 is moved to the outside of the adjustment tube 72 by rotating the adjustment member 74 in the other direction.

The adjusting member 74 is formed with an inclined surface 76 which is in close contact with the protrusion 72c at an inner end of the adjusting member 74 and a rotary groove portion 78 are formed.

When the operator inserts a tool such as a jig or a wrench into the rotary groove portion 78 to rotate the adjustment member 74 in one direction, the adjustment member 74 is inserted into the adjustment tube 72 to form the inclined surface 76 and the protrusions 72c are in close contact with each other to close the flow path between the inlet port 72a and the outlet port 72b.

Conversely, when the operator rotates the adjusting member 74 in the other direction, the adjusting member 74 is moved to the outside of the adjusting pipe 72, and the driving fluid passes through the gap between the inclined surface 76 and the protruding portion 72c. Thereby performing an opening operation or a closing operation of the valve.

FIG. 8 is a cross-sectional view showing a descaler opening / closing valve according to a fourth embodiment of the present invention, and FIG. 9 is an operational state view showing a gap adjusting portion of a descaler opening / closing valve according to a fourth embodiment of the present invention.

Referring to FIGS. 1, 8 and 9, a descaler opening / closing valve according to a fourth embodiment of the present invention includes a main body 10 having a first hole 12 and a second hole 14 through which a working fluid passes, A plunger 20 movably installed in the main body 10 for opening and closing a flow path 16 between the first hole 12 and the second hole 14, The degree of opening and closing of the flow rate regulator 70 is varied according to the pressure difference between the front flow path of the flow rate regulator 70 and the rear flow path of the flow rate regulator 70, And a flow rate varying section (80).

When the descaler opening / closing valve is opened, the plunger 20 is lifted and the driving fluid flowing into the main body 10 through the first hole portion 12 is discharged to the outside of the main body 10 through the second hole portion 14, The amount of the driving fluid discharged through the second hole portion 14 by the flow rate control portion 70 and the flow rate variable portion 80 is maintained to be within a certain range.

When the adjusting member 74 is inserted into the adjusting pipe 72, the flow path between the inlet 72a and the discharging port 72b becomes narrower and the speed of the driving fluid discharged is increased. When the adjusting member 74 is inserted into the adjusting pipe 72, As the flow path is expanded, the speed of the discharged driving fluid is slowed down.

At the beginning of the opening operation, since the pressure of the driving fluid is high, the adjusting member 74 is moved to the outside of the adjusting pipe 72 by the flow rate varying unit 80 so that the flow rate of the driving fluid discharged increases, The moving speed of the driving fluid becomes slow.

When the discharge of the driving fluid is continued, the pressure difference is reduced and the pressure of the driving fluid discharged along the second hole portion 14 is lowered. Therefore, the operation of the flow rate regulator 70 causes the regulating member 74 to regulate 72, the flow path is narrowed.

When the flow path is narrowed due to the movement of the regulating member 74, the moving speed of the driving fluid discharged through the discharging port 72b is increased, so that the amount of the driving fluid discharged through the discharging port 72b They are within a certain range and maintain similar amounts.

The flow rate variable portion 80 includes a finishing panel 82 installed at an outer end of the control tube 72 and an elastic body 84 interposed between the finishing panel 82 and the regulating member 74.

When the pressure of the driving fluid flowing into the adjusting pipe 72 through the inlet port 72a is high, the elastic member 84 is compressed and the adjusting member 74 is moved to the outside of the adjusting pipe 72, The adjusting member 74 is inserted into the adjusting tube 72 by the restoring force of the elastic body 84. [

The adjusting member 74 has an inclined surface 76 which is in close contact with the protrusion 72c and an insertion groove 79 is formed at the outer end of the adjusting member 74 to which the elastic body 84 is fixed.

The elastic body 84 is compressed or expanded according to the pressure change of the driving fluid supplied through the inlet port 72a so that the adjusting member 74 and the protrusion 72c are adjusted.

This makes it possible to provide a descaler opening / closing valve that reduces the impact generated in the flow path of the working fluid when the descaling process is started or terminated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

Although a descaler opening / closing valve has been described as an example, this is merely an example, and the pressure regulating device of the present invention may be used in products other than the descaler opening / closing valve.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: main body 12: first hollow portion
12a: step 12b: seat groove
14: second hole portion 16:
20: plunger 30:
32: ring member 34:
36: operation groove portion 38:
38a: Fixing groove portion 50:
52: fixing member 54 elastic member
70: flow rate regulator 72: regulating tube
72a: Inlet port 72b: Outlet port
74: regulating member 76: inclined surface
78: rotation groove portion 78a:
79: insertion groove portion 80: flow rate variable portion
82: Finishing panel 84: Elastic body
110: valve body 112: inlet
114: discharge port 116: opening /
118: pressurizing portion 119: opening /
130: opening / closing member 150: switch block
152: supply passage 154: discharge passage
156: extension channel 170: switch section
172: switch main body 174:
176: guide member 178:
179:

Claims

A valve body having a suction port and a discharge port, through which a working fluid for descaling operation passes;
An opening / closing member movably installed in the valve body for opening / closing a flow path between the inlet port and the outlet port;
And a switch portion for determining whether or not a drive fluid for moving the opening / closing member is supplied;
A space forming a pressing portion is formed between the upper end of the opening and closing member and the valve body, and an opening / closing passage extending from the pressing portion to the outside of the valve body is formed;
A switch block is provided on an outer wall of the valve body opposite to the switching valve, the extension block being in communication with the switching valve, and a supply passage and a discharge passage are formed in the switch block;
Wherein the supply passage and the discharge passage are provided with a pressure regulating device for regulating the flow rate of the driving fluid;
The pressure regulating device includes:
A body having a first hole portion and a second hole portion through which the working fluid passes;
A plunger movably installed in the main body and opening / closing a flow path between the first hole portion and the second hole portion; And
And a flow regulator for regulating an amount of the working fluid discharged from the main body.

The apparatus according to claim 1,
A control tube installed in the second hole and having an inlet and an outlet; And
And an adjusting member movably installed in the control tube and opening / closing a flow path between the inlet and the outlet.

3. The method of claim 2,
Wherein the control tube is formed in a pipe shape, and the discharge port is formed on a circumferential surface thereof, and a projection is formed between the inlet port and the discharge port.

The method of claim 3,
Wherein a screw thread is formed on the circumferential surface of the adjusting member and is coupled to the adjusting tube.

5. The method of claim 4,
Wherein the adjusting member has an inclined surface which is in close contact with the protrusion and an outer end of the adjusting member is formed with a rotation groove into which the jig is inserted to rotate the adjusting member.