KR101597717B1 - Injector and operating method thereof - Google Patents

Abstract

The present invention relates to a spraying apparatus for spraying a spray liquid, comprising: a supply passage for receiving a spray liquid; a spray passage for spraying the spray liquid; a nozzle having therein a connection passage for connecting the supply passage and the spray passage; A spraying device for spraying a sprayed liquid onto a processed product passing through a facility, the spraying device comprising: a filter member through which the sprayed liquid passes; and a foreign matter discharge portion having a foreign matter discharge passage connected to the supply passage, Detecting a pressure of each of the supply passage through which the injection liquid is supplied and the injection passage through which the mixed fluid is injected by a pressure sensor; selectively opening the foreign matter discharge passage connected to the supply passage in accordance with the detected pressure value; The spraying device can discharge the foreign matter introduced into the spraying device to the outside of the spraying device, And methods for their operation are presented.

Description

Injector and operating method < RTI ID = 0.0 >

The present invention relates to an injection device and an operation method thereof, and more particularly, to an injection device which is capable of filtering a foreign matter introduced into an injection device and injecting it into the device and discharging it to the outside of the device, and an operation method thereof.

The continuous casting facility is a facility that supplies refined molten steel from the steelmaking facility and produces it as a cast steel. For example, the continuous casting facility includes a ladle containing refined molten steel, a tundish to receive molten steel temporarily from the ladle, temporarily store the molten steel, a casting mold that receives molten steel from the tundish at the lower side of the tundish and draws it into the hot cast slab, And a segment for receiving and cooling the hot slab drawn from the mold. The segments are provided with nozzles for injecting cooling water toward the hot strip, and the nozzles are currently implemented in various configurations and schemes. For example, Japanese Patent Application Laid-Open No. 10-0825284 discloses a water spray nozzle for slab cooling continuous casting, and Registration Practical Utility Model No. 20-0203190 discloses a cooling water spray nozzle of a continuous casting facility.

As described in the above-mentioned prior art documents, a filter is provided in the nozzle to filter foreign matters mixed in the cooling water. Meanwhile, when a predetermined amount of foreign matter is accumulated in the filter and it is necessary to remove it, conventionally, the operator disassembles a part of the nozzle, separates the filter from the part, and removes foreign matter accumulated in the filter. Thus, the following problems have been encountered. First, the work of collecting the foreign substances accumulated in the nozzle was performed by the operator, and the worker 's burden was increased due to the operator' s moving to the continuous casting facility and the decomposition of the nozzle. Next, since part of the nozzle must be disassembled at the time of removing the foreign substances accumulated in the filter, the foreign matter accumulated in the filter in the nozzle can not be removed during the continuous casting process. Therefore, when foreign matter accumulates on the filter while the continuous casting process is carried out and the nozzle is clogged, it is difficult to cope with this, which is a cause of thermal damage to the equipment and deterioration of the quality of the produced cast steel.

KR 10-0825284 B1 KR 20-0203190 Y1

The present invention provides a spraying device and a method of operating the same, which are capable of filtering out foreign substances introduced into the spraying device and introduced into the spraying device and discharging the foreign substances to the outside of the device.

The present invention provides an injection device capable of easily discharging foreign matter accumulated in a filter in a state where a filter is mounted in the device, and an operation method thereof.

The present invention provides an injection device and an operation method thereof capable of forcibly discharging foreign matter accumulated in a filter in a device using a spray liquid supplied to the device.

The present invention provides an injection device and an operation method thereof capable of selectively discharging foreign matter accumulated in a filter in the device while the device injects the injection liquid.

An injection apparatus according to an embodiment of the present invention is a spray apparatus for spraying a spray liquid onto a processing object passing through a facility, comprising: a nozzle through which a spray liquid flows and is sprayed; A filter member provided in the nozzle and through which the spray liquid passes; And a foreign matter discharge passage having a foreign matter discharge passage connected to the nozzle.

Wherein the nozzle is formed with a supply passage for receiving the injection liquid, a injection passage through which the injection liquid is injected, and a connection passage for connecting the supply passage and the injection passage, and the filter member is connected to the supply passage, And the foreign matter discharge passage may be connected to the supply passage.

And an orifice member located in the connection passage for receiving the injection liquid from the filter member and injecting the injection liquid into the injection passage, the area of the passage through which the injection liquid passes is reduced in the injection direction.

And a foreign matter discharge controller connected to the nozzle and the foreign matter discharging unit and controlling whether the foreign matter discharging passage is opened or closed by detecting a change in the pressure inside the nozzle.

The nozzle may include a gas injection orifice member having a gas supply passage connected to the injection passage and located in the gas supply passage to inject gas supplied to the gas supply passage into the injection passage.

The connection passage and the injection passage may be formed through the nozzle in a longitudinal direction of the nozzle, and the supply passage and the foreign matter discharge passage may be formed through the nozzle in a direction crossing the longitudinal direction.

Wherein the filter member has an inner space through which the jetting liquid passes and an outer circumferential surface surrounding the inner space, the inner space of the filter member opens in a direction crossing the longitudinal direction, and the outer peripheral surface of the filter member A mesh area capable of filtering foreign matters mixed in the spray liquid may be formed.

Wherein one end of the outer circumferential surface of the filter member is in close contact with an inner wall of an inlet end of the supply passage to which the injection liquid is supplied and at least a part of the outer circumferential surface of the filter member is located on the inlet end of the connection passage on the supply passage side And the other end of the outer circumferential surface of the filter member may be in close contact with the inner wall of the outlet end of the supply passage.

The foreign matter discharge passage may be connected to the outlet end of the supply passage to communicate with the internal space of the filter member. The foreign matter discharge passage may include a discharge valve mounted on the foreign matter discharge passage for selectively opening the foreign matter discharge passage, Wherein the discharge valve includes a valve housing disposed to cross the foreign matter discharge passage and having a sliding space extending in a direction intersecting the foreign matter discharge passage; A sliding member slidably mounted in the sliding space of the valve housing and having a discharge port through which the spray liquid passes; At least a part of which is disposed through the inside of the valve housing, and an end located inside the valve housing is connected to the sliding member; And an elastic member having one end supported by the valve housing and the other end supported by the driving member to provide a restoring force to the driving member.

The foreign matter discharge controller includes: a first pressure sensor connected to the supply passage; A second pressure sensor connected to the injection passage; A signal output unit connected to the first pressure sensor and the second pressure sensor; And a valve driving unit connected to the signal output unit and the discharge valve, wherein the valve driving unit can control the operation of the discharge valve in response to a change in pressure of the supply passage and the injection passage.

The facility may include a continuous casting facility for producing refractory molten steel into a cast steel, and the processed material may include a cast continuously cast in the continuous casting facility.

A method of operating an injection apparatus according to an embodiment of the present invention is a method of operating an injection apparatus that injects a spray liquid onto a processed product passing through a facility, the method comprising: supplying the spray liquid and a gas to a nozzle, Spraying a mixed mixed fluid onto the treated material; Detecting a pressure of each of the supply passages through which the injection liquid is supplied and the injection passages through which the mixed fluid is injected, out of the passages formed in the nozzle; And selectively opening the foreign matter discharge passage connected to the supply passage according to the detected pressure value.

Wherein the step of selectively opening the foreign substance discharge passage comprises the steps of: when a first pressure value detected in the supply passage exceeds a predetermined first reference pressure value, and a second pressure value detected in the injection passage is greater than a predetermined second reference value And temporarily releasing the foreign object discharge passage when the pressure difference is less than the pressure value.

According to the embodiment of the present invention, it is possible to obtain the injection device in which the foreign substances introduced into the injection liquid, the foreign matter introduced into the injection liquid, and the foreign matter discharge passage allowing the filtered foreign matter to be discharged to the outside of the device are formed. The injection device is used to filter the foreign matter introduced into the device by using the filter member to filter the foreign matter introduced into the device, and to instantaneously open the foreign matter discharge passage to easily discharge the filtered foreign matter to the outside of the injection device.

Further, according to the embodiment of the present invention, it is possible to obtain an injection device having a control section for controlling the opening of the foreign matter discharge passage by sensing the pressure change in the injection device. When the foreign substance is accumulated in the filter by a predetermined amount or more by using the control unit, the injection device can immediately open the foreign substance discharge passage and quickly discharge the foreign substance.

For example, when applied to a continuous casting plant, the injector senses a change in pressure in the injector during injecting the injector into the hot run, thereby selectively opening the foreign object exit path and thereby forming a part of the injected liquid flowing in the injector The foreign matter accumulated in the filter member can be discharged to the outside of the injector. That is, in a state in which the filter is mounted in the injection device, the foreign matter discharge line is opened to forcefully discharge the accumulated foreign substances from the injection device together with a part of the injection liquid supplied to the injection device.

From this, the continuous casting process using the continuous casting equipment and the operation of removing the accumulated foreign substances in the filter in the jetting device can be performed independently of each other. Accordingly, it is possible to improve the operating rate of the spraying apparatus more than the conventional one, and in particular, when the nozzle clogging occurs during the continuous casting process, it is possible to promptly cope with the nozzle clogging, It is possible to effectively prevent degradation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a facility to which an injector according to an embodiment of the invention is applied. FIG.
2 is a side view of an injection device according to an embodiment of the invention.
3 is an exploded view of an injection device according to an embodiment of the invention;
4 to 6 are schematic diagrams of an injection device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. The drawings may be exaggerated in size to illustrate the embodiments, and like reference numbers in the drawings indicate like elements.

FIG. 2 is a side view showing an injection device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of an injection device according to an embodiment of the present invention. And an exploded view of each component of the apparatus.

An injection apparatus 1000 according to an embodiment of the present invention is an injection apparatus 1000 for injecting a spray liquid L onto a processing object S passing through a facility 1, And a continuous casting facility for supplying the refined molten steel from the equipment and producing it as a cast steel, and the treated material S may be a cast steel continuously cast in a continuous casting facility.

1, the continuous casting facility includes a ladle 10 containing refined molten steel, a turn-dish 20 for receiving molten steel from the ladle 10 and temporarily storing the molten steel, A mold 30 for supplying molten steel from the tundish 20 at the lower side and drawing the molten steel from the tundish 20 into a hot slab and a segment 40 for receiving a hot slab drawn from the mold 30 at a lower side of the mold 30 to cool the hot slab . The segment 40 is provided with a roller device 41 for guiding the withdrawal hot strip and an injection device 1000 according to an embodiment of the present invention is disposed in the segment 40 and passes through the segment 40 And is used as a device for cooling the hot slab.

In this case, the above-described continuous casting equipment is not limited to a specific configuration in explaining the embodiments of the present invention, and thus a detailed description thereof will be omitted in order not to obscure the gist of the present invention.

Hereinafter, an injection apparatus 1000 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. The injection apparatus 1000 includes a supply passage 110 to which the injection liquid L is supplied, a injection passage 120 to which the injection liquid L is injected, a connection passage 120 to connect the supply passage 110 and the injection passage 120, A nozzle 100 in which a gas supply passage 140 connected to the nozzle passage 130 is formed and a nozzle passage 100 is formed between the supply passage 110 and the connection passage 130, The filter member 200 passing through the filter member 200 is positioned in the connection passage 130 to receive the injection liquid L from the filter member 200 and to inject the injection liquid L into the injection passage 120, A foreign matter discharge portion 400 having a foreign matter discharge passage 410 connected to the supply passage 110 and a gas supply passage 140. The orifice member 300 is divided into a plurality of A gas injection orifice member (500) located in a gas supply passage (140) for injecting a supplied gas (g) such as air into the injection passage (120) The.

The injection apparatus 1000 includes a foreign matter discharge controller (not shown) connected to the nozzle 100 and the foreign matter discharge unit 400 and configured to detect a pressure change inside the nozzle 100 and to control the opening and closing of the foreign matter discharge passage 410 500). When the foreign object is accumulated in the filter member 200 in the process of injecting the spray liquid L into the processed product S, the discharge device 1000 temporarily transfers the foreign substance discharge passage 410 to the foreign substance discharge controller 600 So that the accumulated foreign matter can be quickly discharged to the outside of the nozzle 100.

The nozzle 100 may be formed in various shapes and shapes that satisfy the requirement that the remaining components of the injection device 1000 can be mounted and supported by the main body of the injection device 1000, Size. That is, in the present embodiment, the shape and size of the nozzle 100 are not particularly limited. For example, the nozzle 100 may be a predetermined size block extending in the longitudinal direction. The nozzle 100 has a passage through which the spray liquid L and the gas g are passed. The passage may be divided into a supply passage 110, a spray passage 120, a connection passage 130, and a gas supply passage 140.

The supply passage 110 may be formed to penetrate the upper region of the nozzle 100 in a direction crossing the longitudinal direction. The supply passage 110 may be a cylindrical passage having a passage area of a size such that the injection liquid L at a desired flow rate can be smoothly supplied into the supply passage 110. A spray liquid supply pipe 710 may be connected to one end of both ends of the supply passage 110 and a foreign matter discharge passage 410 of the foreign matter discharge unit 400 may be connected to the other end thereof. One end of the supply passage 110 to which the spray liquid supply pipe 710 is connected is referred to as an inlet end of the supply passage 110 and the other end to which the foreign matter discharge passage 410 is connected is referred to as a supply passage 110 ). On the other hand, an O-ring 150 made of, for example, rubber is provided between the jetting liquid supply pipe 710 and the nozzle 100 to seal them therebetween.

The supply passage 110 is formed such that the area of the passage is gradually reduced in the direction from the inlet end to the outlet end of the supply passage 110 so that a plurality of stages can be formed on the inner peripheral surface of the supply passage 110, The inner circumferential surface of the supply passage 110 can be divided into a plurality of regions. A region formed on the inlet end side of the supply passage 110 is referred to as a first region and a region formed on the outlet end side of the supply passage 110 is referred to as a second region, And a region connecting the first region and the second region is referred to as a third region. The filter member 200 can be inserted into the third region of the inner circumferential surface of the supply passage 110 and the first ring member 160 can be inserted into the first region. The filter member 200 inserted into the supply passage 110 is divided into a third region of the inner circumferential surface of the first ring member 160 and the supply passage 110 inserted in the first region of the inner peripheral surface of the supply passage 110, And can be fixed in the supply passage 110. [0050] As shown in FIG.

The injection passage 120 may be formed to penetrate the lower region of the nozzle 100 in the longitudinal direction. The injection passage 120 may be a cylindrical passage having a passage area smaller than the passage area of the supply passage 110. When the flow velocity of the jetting liquid L passing through the jetting passage 120 due to the difference in the passage area between the supply passage 110 and the jetting passage 120 passes through the supply passage 110, (L). One end of each end of the injection path 120 is located in the nozzle 100 and can be connected to the connection passage 130 and the other end is positioned at the lower end of the nozzle 100 to be opened to the outside of the nozzle 100 . One end of the injection passage 120 connected to the connection passage 130 is referred to as an inlet end of the injection passage 120 and the other end of the nozzle 100 which opens to the lower side is referred to as an injection passage 120, .

Although not shown in the drawing, the injection passage 120 can be gradually reduced in the direction from the inlet end to the outlet end of the injection passage 120, and the injection liquid passing through the injection passage 120 (L) can be smoothly injected to the outside of the nozzle (100).

The connection passage 130 may be formed in the longitudinal direction through an intermediate region between the upper region and the lower region of the nozzle 100. One end of each of the opposite end portions of the connection passage 130 may be located on the inner peripheral surface of the supply passage 110 and open into the interior of the supply passage 110 and the other end thereof may be located on the inlet end of the injection passage 120 And may be opened into the interior of the injection passage 120. Accordingly, the connection passage 130 can connect the inside of the supply passage 110 and the inside of the injection passage 120 with each other. One end of the connection passage 130 connected to the supply passage 110 is referred to as an inlet end of the connection passage 130 and the other end of the connection passage 130 connected to the connection passage 130 is referred to as an inlet end Exit end.

The connection passage 130 may be a cylindrical passage having a passage area of a predetermined size and at this time the passage area of the connection passage 130 satisfies that the orifice member 300 can be disposed in the connection passage 130 Lt; / RTI > The connection passage 130 may have a thread on the inner circumferential surface thereof and the orifice member 300 may be fixedly coupled to the thread of the inner circumferential surface of the connection passage 130.

The gas supply passage 140 may be formed through one side of the lower region of the nozzle 100 in a direction crossing the longitudinal direction. A gas supply pipe 720 may be connected to one end of the gas supply passage 140 located at the outer circumferential surface of the nozzle 100. At this time, an O-ring 150 is provided between the gas supply pipe 720 and the nozzle 100 so that they can be sealed therebetween. The other end of the gas supply passage 140 may be positioned on the inner peripheral surface of the injection passage 120 and open into the interior of the injection passage 120. One end of the gas supply passage 140 that is connected to the gas supply pipe 720 is referred to as an inlet end of the gas supply passage 140 and the other end of the gas supply passage 140 that is connected to the gas supply passage 140 is referred to as a gas supply passage 140).

The gas supply passage 140 may be a cylindrical passage having a passage area of a size such that the gas g at a desired flow rate is supplied to the inside of the gas supply passage 140 and smoothly flows. At this time, the passage area of the gas supply passage 140 may be a size that satisfies that the gas injection orifice member 500 can be disposed in the gas supply passage 140. A gas injection orifice member 500 is coupled and fixed to the thread of the inner circumferential surface of the gas supply passage 140 on the side of the inlet end of the gas supply passage 140 . The gas supplied into the inlet end of the gas supply passage 140 may be injected into the outlet end of the gas injection passage 140 through the gas injection orifice member 500 and stably supplied to the injection passage 120.

An orifice member insertion port and a coupling protrusion may be provided at an upper end of the nozzle 100 to insert the orifice member 300 into the connection passage 130 of the nozzle 100. [ The orifice member insertion port passes through the upper end of the nozzle 100 in the longitudinal direction of the nozzle 100. The upper end of the orifice member insertion port can be opened to the upper side of the nozzle 100 and the lower end of the orifice member insertion port And may be located on the inner circumferential surface of the passage 110 and open into the interior of the supply passage 110. The passage area of the orifice member insertion port can be formed to a size such that the orifice member 300 can pass through. The engaging projection may protrude from the upper end of the nozzle 100 so as to surround the upper end of the orifice member insertion port, and a thread may be formed on the inner circumferential surface of the nozzle. A cylindrical stopper member 170 may be coupled to the thread of the inner circumferential surface of the engaging protrusion, and a thread may be formed on the outer circumferential surface of the lower region of the stopper member 170 for this purpose. The outer circumferential surface of the upper region of the plug member 170 protrudes outward with respect to the outer circumferential surface of the lower region, and a predetermined size is formed between the lower region and the upper region of the plug member 170. An annular second ring member 180 is provided between the stopper member 170 and the engaging protrusion and closely contacts the upper surface of the engaging protrusion and the end between the upper region and the lower region of the stopper member 170, So that the space between the stopper members 170 can be sealed.

The injection liquid L, for example, cooling water is supplied to the nozzle 100, and the supplied cooling water is controlled to have properties suitable for cooling through chemical purification and precipitation, and then supplied to the nozzle 100. At this time, while the cooling water flows in the spray liquid supply pipe 710, the cooling water chemically or physically corrodes the inner wall of the spray liquid supply pipe 710, so that foreign matter is generated in the spray liquid supply pipe 710, As shown in FIG. The passage of the orifice member 300 having a relatively narrow passage area may be clogged by the foreign substances introduced into the nozzle 100 and the filter member 200 is provided in the nozzle 100 in order to prevent the passage.

The filter member 200 is provided in the nozzle 100 so as to allow the spray liquid L to pass therethrough and has an inner space through which the spray liquid L passes and an outer peripheral surface surrounding the inner space, And may be a cylindrical filter member 200 sized to be inserted into the passageway 110. The inner space 210 of the filter member is opened in a direction crossing the longitudinal direction and the outer circumferential surface 220 of the filter member may have a mesh region for filtering foreign matters mixed in the injection liquid. At this time, the size of the eye of the mesh region may be smaller than the size of the passage area of the outlet end of the throttling passage provided in the orifice member 300. Foreign matter having a particle size equal to or larger than the passage area of the outlet end of the throttle passage is filtered by the filter member 200 and remains in the internal space of the filter member 200.

The filter member 200 is disposed in the third region within the supply passage 110 as described above so that one end of the outer circumferential surface 220 of the filter member can be brought into close contact with the inner wall of the inlet end side of the supply passage 110 , And the other end of the outer circumferential surface (220) of the filter member can be brought into close contact with the inner wall at the outlet end side of the supply passage. Thus, the inner space 210 of the filter member can be connected to the supply passage 110. At least a part of the outer circumferential surface 220 of the filter member may be positioned on the inlet end of the connecting passage 130 on the supply passage 110 side. The injection liquid L supplied to the inner space 210 of the filter member may be supplied to the connection passage 130 through the outer circumferential surface 220 of the filter member positioned on the inlet portion of the connection passage 130 .

The orifice member 300 may be a cylindrical orifice member 300 sized to be inserted into the connection passage 130. A thread is formed on the outer peripheral surface of the orifice member 300 and can be fixedly coupled to the thread of the inner circumferential surface of the connection passage 130 by using the thread. The orifice member 300 is provided with a throttling passage through which the spray liquid L passes, and the throat passage can be formed through both longitudinal ends of the orifice member 300. One end of the throttle passage on the side of the supply passage 110 is referred to as an inlet end of the throttle passage and the other end of the throttle passage on the side of the injection passage 120 is referred to as an outlet end of the throttle passage. The passage area of the inlet end of the throttle passage may be formed to a size such that the spray liquid L can smoothly flow into the throttle passage. The area of the passage in the throttling passage is reduced in the direction from the outlet end toward the inlet end so that the passage area at the outlet end of the throttling passage is smaller than the outlet area of the inlet end so that the spray liquid L can be injected at the desired flow rate As shown in FIG. The inner circumferential surface on the inlet end side of the throttle passage may be formed into a shape into which a tool such as a hexagonal wrench can be inserted so that the orifice member 300 can be easily coupled to and separated from the connection passage 130, 300 can be rotated and coupled to and disconnected from the connection passage 130.

Foreign substances may accumulate in the inner space of the filter member 200 while the spraying device 1000 injects the sprayed liquid into the treated product. The injection device 1000 may be provided with a foreign matter discharging part 400 capable of forcibly discharging the foreign matter from the nozzle 100 to prevent the foreign matter from accumulating for a long time and clogging the inlet end of the connecting passage 130 have. The foreign matter discharge part 400 includes a foreign matter discharge path 410 connected to the supply path 110 and a discharge valve 420 installed in the foreign matter discharge path 410 to selectively open the foreign matter discharge path 410 .

The foreign matter discharge passage 410 is connected to the nozzle 100 and passes through one side of the upper region of the nozzle 100 in the direction crossing the longitudinal direction of the nozzle 100, Or the like. The foreign matter discharge passage 410 may be a cylindrical pipe having a passage area corresponding to the passage area of the supply passage 110. On the other hand, an O-ring 150 is provided between the foreign matter discharge passage 410 and the nozzle 100 to seal them therebetween. The foreign matter discharge passage 410 may communicate with the internal space of the filter member 200 through the outlet end of the supply passage 110 to create a foreign matter discharge path extending in one direction, Foreign matter accumulated in the space can be easily discharged. Particularly, since the foreign matter discharge passage 410, the supply passage 110 and the internal space 210 of the filter member are formed in parallel with each other, even if the flow of the spray liquid L is not additionally controlled, The foreign substances accumulated in the internal space 210 of the filter member together with a part of the spray liquid L can be discharged to the outside of the nozzle 100 and removed.

The discharge valve 420 is provided at one side of the foreign matter discharge passage 410 and controls whether the foreign matter discharge passage 410 is opened or closed. In this embodiment, a gate valve type discharge valve 420 is exemplified. However, the structure and operation manner of the discharge valve 420 are not limited to this, and for example, a configuration and an operation method of a ball valve may be applied.

The discharge valve 420 includes a valve housing 421 disposed to intersect with the foreign matter discharge passage 410 and having a sliding space extending in a direction intersecting the foreign matter discharge passage 410, And at least a part of the sliding member 422 is disposed so as to pass through the inside of the valve housing 421. The sliding member 422 is disposed in the valve housing 421, The driving member 423 has one end supported by the valve housing 421 and the other end supported by the driving member 423 so that the driving member 423 has a restoring force And an elastic member 424 for providing an elastic force.

The valve housing 421 may be formed in a block shape having a predetermined size and may be mounted so as to surround the outer circumferential surface of one side of the foreign matter discharge passage 410 so that the inside of the valve housing 421 can communicate with the foreign matter discharge passage 410. The sliding member 422 is disposed in the sliding space of the valve housing 421 and the direction of arrangement thereof may be a direction crossing the foreign matter discharge passage 410. [ The sliding member 422 may be a plate-like member, and may be divided into an upper region where the discharge port is formed and a lower region except for the upper region. The sliding member 422 may have an outlet in the upper region through one side of the upper region of the sliding member 422 in the direction in which the foreign matter discharge passage 410 extends. The passage area of the discharge port may be formed to have a size corresponding to the passage area of the foreign matter discharge passage 410. The sliding member 422 may have a blocking surface capable of blocking the foreign matter discharge passage 410 in the lower region.

The driving member 423 may be a bar-shaped member, and is mounted through the upper portion of the valve housing 421 in the vertical direction. One end of the driving member 423 is connected to the sliding member 422 in the valve housing 421. The other end of the driving member 423 is located on the outer side of the valve housing 421 and the other end of the driving member 423 may be provided with a protrusion of a predetermined size to support the elastic member 424.

The driving member 423 slides the sliding member 422 in the sliding space in the vertical direction and can selectively intersect the upper and lower regions of the sliding member 422 with the foreign matter discharge passage 410. The state in which the lower region of the sliding member 422 intersects the foreign matter discharge passage 410 to block the foreign matter discharge passage 410 is referred to as an initial state of the discharge valve 420, And the position of the driving member 423. The state in which the upper region of the sliding member 422 intersects the foreign matter discharge passage 410 to connect the discharge port of the sliding member 422 to the foreign matter discharge passage 410 is referred to as an operating state of the discharge valve 420, The position of the sliding member 422 and the driving member 423 at this time is referred to as an operating position.

Each end of the elastic member 424 such as an elastic spring can be supported by the valve housing 421 and the driving member 423 and can provide restoring force to the driving member 423 and the sliding member 422 connected thereto . At this time, the action direction of the restoring force may be a direction for projecting the other end of the driving member 423 to the upper side of the valve housing 421. That is, the elastic member 424 can provide the restoring force to the driving member 423 so that the lower region of the sliding member 422 intersects with the foreign matter discharge passage 410 to maintain the state. The foreign matter discharge controller 600 slides the driving member 423 and the sliding member 422 connected thereto to the inside of the valve housing 421 so that the discharge port of the upper region of the sliding member 422 is connected to the foreign matter discharge passage 410 It is possible to provide a restoring force in the upward direction to the driving member 423 so as to restore the driving member 423 and the sliding member 422 connected thereto to the initial position.

The foreign matter discharge part 400 is constructed as described above and temporarily discharges the foreign matter discharge path 410 with the discharge valve 420 to discharge a part of the spray liquid L into the foreign matter discharge path 410, The foreign substances accumulated in the internal space 210 of the filter member may be discharged to the outside of the nozzle 100 together with the spray liquid L by using the spray liquid L as shown in FIG.

The injection device 1000 may further include a gas injection orifice member 600. The gas injection orifice member 600 may be a cylindrical member of a size that can be inserted into the gas supply passage 140. The gas injection orifice member 600 may be coupled to the inner circumferential surface of the gas supply passage 140. The gas injection orifice member 600 may be a screw thread formed on the outer circumferential surface of the gas injection orifice member 600, The gas injection orifice member 600 has a gas injection passage through which the gas g is passed and the gas injection passage can be formed to penetrate both side ends of the gas injection orifice member 600. The passage area of the gas injection passage may be formed to a size such that the gas g can be smoothly injected into the gas supply passage 140. The gas injection orifice member 600 injects the gas g toward the outlet end side of the gas supply passage 140 so that the gas g and the injection liquid L are mixed with each other at the outlet end side of the gas supply passage 140 . By mixing the gas g and the spray liquid L, the droplets of the spray liquid L become atomized and the particle size can be controlled to a desired particle size. As the particle size of the droplets of the spray liquid L is controlled to the desired particle size, the spray liquid L that passes through the outlet end of the spray path and is sprayed to the treated material S collides with the treated material S, It is possible to effectively reduce the impact applied to the object S.

The injection apparatus 1000 according to the present embodiment may include a foreign matter discharge controller 600 for immediately sensing foreign matter accumulated in the nozzle 100 and operating the foreign matter discharge unit 400. The foreign matter discharge controller 600 includes a first pressure sensor 610 connected to the supply passage 110 to measure a pressure value of the supply passage 110, a second pressure sensor 610 connected to the injection passage 120 to measure a pressure value of the second passage, A signal output unit 630 connected to the pressure sensor 620, the first pressure sensor 610 and the second pressure sensor 620, a valve driver 640 connected to the signal output unit 630 and the discharge valve 420, ). The foreign matter discharge controller 600 calculates pressure changes of the supply passage 110 and the injection passage 120 using the respective pressure values measured from the first pressure sensor 610 and the second pressure sensor 620 The operation of the discharge valve 420 can be controlled by operating the valve driving unit 640 in response to the pressure change of the supply passage 110 and the injection passage 120. [

The first pressure sensor 610 may be provided on the inner peripheral surface of the second region of the supply passage 110 and the second pressure sensor 620 may be provided on the inner peripheral surface of the inlet end of the injection passage 120. Various configurations and systems can be applied to the first pressure sensor 610 and the second pressure sensor 620 to satisfy the requirement that the pressure in the supply passage 110 and the injection passage 120 can be converted into an electrical signal and output. , But this is not particularly limited in the present embodiment. For example, an electronic sensor may be applied which includes a diaphragm connected to the inner circumferential surface of each passage as a pressure sensor, and a piezoelectric element connected to the diaphragm to sense a change in the pressure of the diaphragm, and calculates the pressure of each passage from the pressure change of the diaphragm.

The signal output unit 630 may be a module configured by, for example, a circuit that performs data storage, calculation, and control. The signal output unit 630 receives the respective pressure values from the first pressure sensor 610 and the second pressure sensor 620 and receives the first pressure value output from the first pressure sensor 610, When the pressure value is exceeded and the second pressure value output from the second pressure sensor 620 is less than the predetermined second reference pressure value, the nozzle clogging signal can be outputted. Here, the first reference pressure value means a pressure value of the jetting liquid L in the supply passage 110 when there is no foreign substance in the internal space 210 of the filter member, that is, when the nozzle 100 is in a steady state . The second reference pressure value is a value obtained by multiplying the injection liquid L in the injection passage 120 when the foreign matter is accumulated in the internal space 210 of the filter member, that is, when the nozzle 100 is in an abnormal state ). ≪ / RTI >

The valve driving unit 640 is provided at one side of the discharge valve 420 and a part of the valve driving unit 640 is connected to the driving member 423 of the discharge valve 420. When the signal for blocking the nozzle is outputted from the signal output unit 630, And a mechanism for operating the discharge valve 420 of the unit 400, and the construction and the method thereof are not particularly limited. For example, in the present embodiment, the valve-driving unit 423 is composed of a shaft operated in the vertical direction by the rotation of the servomotor and the servomotor, and operated in such a manner that the driving member 423 of the discharge valve 420 is lifted and lowered (640). The valve driving unit 640 receives the clogging signal to lower the shaft toward the driving member 423 of the discharge valve 420 to switch the discharge valve 420 from the initial state to the operating state. Subsequently, the shaft is raised again to switch the discharge valve 420 to the initial state. That is, the valve driving unit 640 serves to temporarily switch the state of the discharge valve 420. Even if the discharge valve 420 is temporarily opened, the foreign matter can be quickly discharged to the foreign matter discharge path 410 by the pressure and flow rate of the spray liquid L flowing in the nozzle 100.

4 to 6 are schematic views of an injection device according to an embodiment of the present invention. FIG. 4 is a schematic view showing a nozzle clogged state of the injection device, FIG. 5 is a schematic diagram showing a foreign matter discharge state of the injection device, and FIG. 6 is a schematic diagram showing a state in which foreign matter is removed from the injection device. Hereinafter, an operation method of the injection device according to the embodiment of the present invention will be described with reference to FIGS. 4 to 6. FIG. At this time, the description of the injection device according to the present embodiment and the overlapping description will be omitted or briefly described.

A method of operating an injection device according to this embodiment is a method of operating an injection device that injects a sprayed liquid into a process product through a facility where the equipment can be a continuous casting facility and the treated product can be a hot run. A method of operating an injection device includes the steps of supplying a spray liquid L and a gas g to a nozzle 100 and injecting a mixed fluid in which a gas g and a spray liquid L are mixed into a treatment object S The first pressure sensor 610 and the second pressure sensor 620 apply the pressures of the supply passage 110 in which the injection liquid is supplied and the injection passage 120 in which the mixed fluid is injected among the passages formed in the nozzle 100, And selectively opening the foreign matter discharge passage 410 connected to the supply passage 110 according to the detected pressure value.

The spray liquid L and the gas g are supplied to the nozzle 100 to spray the mixed fluid in which the gas g and the spray liquid L are mixed to the treated material S. [ The foreign matter is filtered in the filter member 200 while the nozzle 100 injects the jetting liquid L and the foreign matter filtered in the internal space 210 of the filter member is gradually accumulated. This is shown in FIG.

The pressure of each of the supply passage 110 and the injection passage 120 is detected by the first pressure sensor 610 and the second pressure sensor 620 while the nozzle 100 injects the spray liquid L. [ At this time, the pressure can be detected continuously. If foreign matter accumulates in the filter member 200 and the foreign matter is accumulated over a predetermined amount, the supply of the jetting liquid L is obstructed by the foreign substance, the pressure in the supply passage 110 increases, . Accordingly, the first pressure value detected in the supply passage 110 exceeds the predetermined first reference pressure value, and the second pressure value detected in the injection passage falls below the predetermined second reference pressure value . The signal output unit 630 outputs a signal to the valve driving unit when the first pressure value exceeds the predetermined first reference pressure value and the second pressure value becomes less than the preset second reference pressure value, So that the foreign matter discharge passage 410 is temporarily opened. That is, in this embodiment, the foreign matter discharge passage 410 is selectively opened according to the detected pressure value. When the foreign matter discharge passage 410 is opened, the foreign matter in the filter member 200 is discharged to the foreign matter discharge passage 410 together with a part of the spray liquid L, and is removed from the nozzle 100. At this time, the pressure in the supply passage 110 can be reduced by opening the foreign matter discharge passage 410, and a part of the gas g injected into the gas supply passage 140 is injected into the filter passage 120 from the injection passage 120, Passes through the outer circumferential surface (220) of the supply passage (110) and assists the discharging operation of the foreign matter. This is shown in Fig.

The valve driving unit 640 of the foreign matter discharge controller 600 returns to the initial state after the discharge valve 420 is opened and then the valve driving unit 640 of the foreign substance discharge controller 600 applies the driving force to the driving member 423 of the discharge valve 420 The acting force is removed, and only the restoring force is applied to the driving member 423. The state of the discharge valve 420 is switched from the operating state to the initial state, and the foreign matter discharge passage 410 is shut off. This is shown in Fig. The nozzle 100 from which the foreign substance is removed can continuously spray the spray liquid L in a steady state.

As described above, the injection apparatus 1000 according to the embodiment of the present invention senses a change in the pressure in the injection apparatus during injection of the injection liquid into the hot run, thereby selectively opening the foreign matter discharge passage 410, Foreign substances accumulated in the member 200 can be quickly discharged to the outside of the injection device. Such a foreign matter removing operation can be carried out without interruption of continuous casting, that is, the continuous casting process using the equipment and the operation of removing the accumulated foreign substances in the filter in the spraying device can be performed independently of each other. Accordingly, the operating rate of the injecting apparatus can be improved as compared with the conventional one, and in particular, when the nozzle clogging occurs during the continuous casting process, it is possible to cope with the problem quickly.

Although the above embodiment of the present invention is exemplified as a continuous casting facility, the present invention can be applied to various apparatuses for spraying the sprayed liquid on processing products of various facilities. It should be noted, however, that the embodiments of the present invention are for the purpose of explanation and not for the purpose of limitation. It is to be understood that various modifications may be made by those skilled in the art without departing from the scope of the present invention.

100: nozzle 200: filter member
400: Foreign matter discharging unit 600: Foreign matter discharging controller

Claims (13)

delete An injection device for injecting a spray liquid onto a treatment object passing through a facility,
A nozzle through which the spray liquid flows and is sprayed;
A filter member provided in the nozzle and through which the spray liquid passes; And
And a foreign matter discharge portion having a foreign matter discharge passage connected to the nozzle,
Wherein the nozzle is formed with a supply passage for receiving the injection liquid, a injection passage through which the injection liquid is injected, and a connection passage for connecting the supply passage and the injection passage,
Wherein the filter member is located between the supply passage and the connection passage,
And the foreign matter discharge passage is connected to the supply passage.
The method of claim 2,
And an orifice member located in the connection passage for receiving the injection liquid from the filter member and injecting the injection liquid into the injection passage, the area of the passage through which the injection liquid passes is reduced in the injection direction.
The method of claim 2,
And a foreign matter discharge controller connected to the nozzle and the foreign matter discharging unit and detecting whether the foreign matter discharge passage is open or closed by sensing a pressure change inside the nozzle.
The method of claim 2,
Wherein the nozzle is provided with a gas supply passage connected to the injection passage,
And a gas injection orifice member located in the gas supply passage to inject gas supplied to the gas supply passage into the injection passage.
The method according to any one of claims 2 to 5,
Wherein the connection passage and the injection passage are formed through the nozzle in a longitudinal direction of the nozzle,
Wherein the supply passage and the foreign matter discharge passage are formed through the nozzle in a direction crossing the longitudinal direction.
The method of claim 6,
Wherein the filter member has an inner space through which the jetting liquid passes and an outer circumferential surface surrounding the inner space,
The inner space of the filter member is opened in a direction crossing the longitudinal direction,
Wherein a filterable mesh region is formed on the outer circumferential surface of the filter member so as to allow foreign matters mixed in the spray liquid to be filtered.
The method of claim 7,
One end of the outer circumferential surface of the filter member is in close contact with the inner wall of the inlet end of the supply passage to which the spray liquid is supplied,
At least a part of the outer peripheral surface of the filter member is located on the inlet end of the connecting passage on the side of the supply passage,
And the other end of the outer circumferential surface of the filter member is in close contact with the inner wall of the outlet end of the supply passage.
The method according to any one of claims 2 to 5,
Wherein the foreign matter discharge portion includes a discharge valve mounted on the foreign matter discharge passage for selectively opening the foreign matter discharge passage,
And the foreign matter discharge passage is connected to the outlet end of the supply passage to communicate with the internal space of the filter member.
The method of claim 9,
The foreign matter discharge controller includes:
A first pressure sensor connected to the supply passage;
A second pressure sensor connected to the injection passage;
A signal output unit connected to the first pressure sensor and the second pressure sensor;
And a valve driving unit connected to the signal output unit and the discharge valve,
Wherein the valve driving unit controls the operation of the discharge valve in response to a change in pressure of the supply passage and the injection passage.
The method according to any one of claims 2 to 5,
The facility includes a continuous casting facility for producing refined molten steel into a cast steel,
Wherein the treated product comprises a cast continuously cast in the continuous casting facility.
CLAIMS 1. An operating method of an injector for injecting a spray liquid into a treatment object passing through a facility,
Supplying the spray liquid and the gas to a nozzle to spray a mixed fluid containing the gas and the spray liquid onto the object;
Detecting a pressure of each of the supply passages through which the injection liquid is supplied and the injection passages through which the mixed fluid is injected, out of the passages formed in the nozzle; And
And selectively opening a foreign matter discharge passage connected to the supply passage in accordance with the detected pressure value.
The method of claim 12,
The process of selectively opening the foreign matter discharge path includes:
When the first pressure value detected in the supply passage exceeds a predetermined first reference pressure value and the second pressure value detected in the injection passage is less than a predetermined second reference pressure value, And opening the spraying device.

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