Casting machine secondary cooling water filtering device, system and application

Abstract

The application provides a continuous casting machine secondary cooling water filtering device, system and application, and relates to the technical field of steel production equipment. Two filter screens are used for filtering, which can improve the filtering effect of the secondary cooling water, and a detection assembly can detect the blocking condition inside the shell. If blocking is judged to occur, the two filter screens are controlled to relatively move under the driving of a replacement assembly. Since a plurality of groups of filter holes corresponding to the first filter screen are arranged on the second filter screen, when a group of second filter holes is blocked, the relative positions of the first filter screen and the second filter screen can be changed, so that the first filter holes are aligned with another group of second filter holes, and the filtering of the secondary cooling water is realized again. Since the second filter screen is arranged on the side close to the shell, the filtering process is from the second filter screen to the first filter screen, and the second filter screen with a plurality of groups of second filter holes can reduce the damage to the first filter screen, and the second filter screen outside is easier to clean.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel production equipment, in particular to a continuous casting machine secondary cooling water filtering device, system and application. BACKGROUND

[0002] Continuous casting secondary cooling refers to the forced and uniform cooling of the casting blank in the length interval from the crystallizer outlet to the length interval of the straightening and correcting machine in the continuous casting steelmaking process, which is called the secondary cooling zone. By improving the secondary cooling system and optimizing the secondary cooling water distribution, the uniform cooling of the casting blank can be realized. Therefore, optimizing the secondary cooling is an important measure for efficient continuous casting technology, and efficient continuous casting has become an important technology for promoting the optimization of the structure of the steel industry in China.

[0003] At present, in order to realize efficient continuous casting, the secondary cooling water of the continuous casting machine of the steelmaking plant is used to cool the equipment and the casting blank, and in the production process, it must have sufficient flow and must be continuous and uninterrupted. For the purpose of saving water resources, the secondary cooling water used is circulated in the system, and after multiple cycles, a large amount of particulate impurities are mixed in the cooling water, the water quality becomes poor, and the filtration of the secondary cooling water system of the continuous casting machine brings great difficulty. In the long run, the filtration device of the secondary cooling water system is easy to be blocked, which leads to the reduction of the flow of the secondary cooling water, and it is difficult to achieve the target cooling effect, which affects the quality of the steel, and seriously affects the production rhythm of the continuous casting, and it is difficult to realize the goal of efficient continuous casting.

[0004] In view of this, the present application is proposed. SUMMARY

[0005] The purpose of the present application is to provide a continuous casting machine secondary cooling water filtering device, system and application, which can realize the filtration of the secondary cooling water and prolong the service life of the continuous casting machine secondary cooling water filtering device.

[0006] The embodiments of the present application are implemented as follows:

[0007] In a first aspect, the present application provides a continuous casting machine secondary cooling water filtering device, which comprises a filter and a water inlet unit, a water outlet unit and a sewage discharge unit in communication with the filter.

[0008] The filter comprises a shell, a filter assembly, a replacement assembly and a detection assembly.

[0009] The filter assembly is arranged in the shell and comprises a first filter screen, a second filter screen and a sealing member. The first filter screen and the second filter screen are arranged in overlap, and the second filter screen is closer to the inner wall surface of the shell than the first filter screen. That is, the first filter screen is an inner screen, and the second filter screen is an outer screen. In the process of filtering water, the water passes through the second filter screen and then passes through the first filter screen, so as to intercept the impurities in the water on the filter screen or between the second filter screen and the inner wall surface of the shell, thereby ensuring that the flow of the secondary cooling water of the continuous casting machine meets the continuous casting cooling standard.

[0010] The first filter screen is provided with first filter holes, and the second filter screen is provided with at least two groups of second filter holes corresponding to the first filter holes. Assuming that the first filter holes are five and located at the five vertices of a pentagram, the number of the second filter holes is at least 10 or a multiple of 5 greater than 10. The second filter holes form multiple groups of pentagrams consistent with the first filter holes, for example, multiple pentagrams arranged side by side, or pentagram structures staggered and overlapped in an area, but the spacing between the same vertices is equal. The above is only an example of the possible implementation of the present application. In specific applications, in order to ensure the filtering efficiency and filtering strength, the number of the first filter holes will be more, and the distribution will be more regular, for example, multiple layers and multiple columns of uniform distribution.

[0011] Therefore, it can be understood that the number of the second filter holes is greater than the number of the first filter holes, and is an integer multiple of the number of the first filter holes.

[0012] Preferably, the distance between the second filter holes on each group of the second filter screen and the corresponding first filter holes is equal.

[0013] The non-filtering hole area of the second filter screen is connected with the first filter screen through a sealing member, so as to ensure the sealing contact between the two filter screens and prevent impurities from entering between the two filter screens and being difficult to clean.

[0014] In an optional embodiment, the second filter screen is provided with multiple sealing grooves on the side close to the first filter screen, for installing the sealing member.

[0015] Preferably, the sealing member is a ring-shaped sealing ring.

[0016] The replacement assembly includes a lifting part and a sealing plate. The sealing plate is slidably connected with the shell and extends along the inner surface of the shell to achieve the sliding sealing between the sealing plate and the shell. The lifting part includes a connecting member and a lifting power member. The lifting power member is installed on the side of the sealing plate away from the interior of the shell. One end of the connecting member is connected with the first filter screen, and the opposite end is connected with the sealing plate, for driving the first filter screen to move so that the first filter holes correspond to each group of the second filter holes.

[0017] The replacement assembly is a key unit for assisting in adjusting the relative positions between the first filter screen and the second filter screen, and realizing alignment of the first filter holes with multiple groups of second filter holes to form multiple groups of through water paths. The specific implementation manner is as follows: the lifting power member works to drive the sealing plate to move upward as a whole. Since the sealing plate is a structure extending into the shell, the shell and the sealing plate can still maintain sliding sealing during the upward movement, and the water filtering process in the shell is not affected. The upward movement of the sealing plate drives the connecting member to move upward, and the connecting member drives the first filter screen to move upward to the position where the first filter holes are aligned with another group of second filter holes, and then the lifting power member stops working. In some embodiments, if a group of second filter holes with a clean channel is below the current group of second filter holes, the lifting unit can also drive the lifting power member to move downward to drive the first filter screen to move downward.

[0018] The detection assembly includes at least one of a pressure sensor, a particle sensor, or a flow meter.

[0019] The pressure sensor is arranged on the shell and is used to detect the pressure inside the shell. When the filter screen in the continuous casting secondary cooling water filtering device is blocked, the pressure in the continuous casting secondary cooling water filtering device will rise, and thus the change in the pressure inside the shell can be used as a basis for judging whether the filter screen is blocked, so as to start the replacement assembly to adjust the filtering channel of water between the first filter screen and the second filter screen.

[0020] The particle sensor is arranged on the blowdown unit and is used to detect the particle content in the shell. The blowdown unit can discharge impurities and other pollutants filtered, and the detection of the particle content of the blowdown unit can indirectly reflect the blocking condition of the filter screen. When the particle sensor detects that the particle concentration is too high, it can be considered that the filter screen is at risk of being blocked.

[0021] In addition, the particle sensor can also be used as a backwashing completion detection element. That is, when the continuous casting secondary cooling water filtering device is backwashed, the particles on the filter screen are washed out and discharged through the blowdown pipe. The particle sensor detects the particle content in the blowdown pipe. When the particle content meets the use requirement, the particle sensor feeds back a signal to stop the backwashing of the continuous casting secondary cooling water filtering device.

[0022] Preferably, the particle sensor can be an acoustic wave detector.

[0023] The flow meter is arranged on the water outlet unit and is used to detect the water outlet flow. The water outlet flow is a key indicator of continuous casting cooling. Only when the water outlet flow is sufficient, can the effective operation of the continuous casting process be ensured. When the filter screen is blocked by particles, the filtering performance of the continuous casting secondary cooling water filtering device will decrease, and thus the water flow after filtering will decrease. Therefore, the flow detected by the flow meter can be used as a basis for judging whether the filter screen is blocked, so as to start the replacement assembly to adjust the filtering channel of water between the first filter screen and the second filter screen.

[0024] In an alternative embodiment, the detection unit can simultaneously employ a flow meter and a pressure sensor as elements for detecting whether the filter screen is blocked, and determine the blocking condition of the filter screen through the double feedback results of the flow meter and the pressure sensor. The relative positions of the first filter screen and the second filter screen are first adjusted by using the replacement assembly to obtain a new water passage, and if the second filter screen cannot form a new water passage with the first filter screen or the first filter screen is also blocked, backwashing is started according to the double feedback results of the flow meter and the pressure sensor to clean the filter screen.

[0025] In other embodiments, other methods can also be used as the basis for detecting whether the filter screen is blocked, and corresponding detection assemblies are provided.

[0026] In an alternative embodiment, the side of the second filter screen away from the first filter screen is provided with a plurality of protrusions, each of which is provided in one-to-one correspondence with the second filter hole, and a plurality of water filtering holes are formed in the protrusions.

[0027] Preferably, the protrusions are semispherical protrusions, and the filter area of the second filter screen is increased by the protrusions to improve the filtering efficiency.

[0028] Preferably, the diameters of the water filtering holes decrease in sequence along the direction from the second filter screen to the first filter screen. Since the flow direction of water is from the second filter screen to the first filter screen, the diameters of the water filtering holes decrease along the water flow direction to better filter the impurities in the water, and the particulate matter can be easily discharged from the second filter screen during backwashing.

[0029] Preferably, the plurality of water filtering holes are uniformly and spacedly arranged on the protrusions.

[0030] Preferably, the filter holes of the first filter screen and the second filter screen are uniformly and spacedly arranged.

[0031] Preferably, the diameter of the end of the second filter hole close to the first filter hole is equal to the diameter of the end of the first filter hole close to the second filter hole to ensure that the water filtering process proceeds smoothly and facilitates the alignment of the first filter screen with the second filter screen when the first filter screen moves.

[0032] Preferably, in order to increase the water filtering area, the first filter screen and the second filter screen are both barrel-shaped structures with a plurality of curved arcs on the side walls, for example, cylindrical structures with a wave shape.

[0033] In an optional embodiment, the replacement assembly further comprises a limiting part, the limiting part comprises a limiting member and a contact head, the limiting member is fixed to the outer wall surface of the shell and is arranged in a spaced manner with the shell, and the contact head is fixed to the sealing plate and extends out of the sealing plate along the installation direction of the lifting power member, so that when the lifting power member drives the sealing plate to move, the limiting member and the contact head limit. The distance between the limiting member and the shell is the distance that the lifting power member can move, so when the second filter screen has two groups of second filter holes, the distance between the limiting member and the shell can be adjusted to be equal to the distance between the two groups of second filter holes corresponding to the same first filter hole.

[0034] In an optional embodiment, the replacement assembly further comprises an auxiliary positioning part, the auxiliary positioning part comprises an elastic member and an adjusting screw, a through hole for installing the adjusting screw is formed in the sealing plate, the outer wall surface of the adjusting screw in the through hole holds the elastic member, and the other end of the adjusting screw extends away from the sealing plate and passes through the lifting power member. The adjusting screw can adjust the contraction or stretching of the elastic member. When the elastic member contracts, it can resist the sealing plate and prevent it from moving upward under the pressure in the shell, so that the sealing environment in the shell is affected. In addition, the adjusting screw can also adjust the contraction and downward pressure of the elastic member, drive the first filter screen to move, change the position of the first filter screen, and ensure that the first filter screen is aligned with the filter holes of the second filter screen.

[0035] In an optional embodiment, the pollution discharge unit comprises a pollution discharge pipe and a pollution discharge valve, the pollution discharge valve is installed on the pollution discharge pipe, the pollution discharge pipe is in communication with the inside of the shell, and the particle sensor is installed on the pollution discharge pipe. The pollution discharge pipe is a pipeline for discharging particles washed out during backwashing.

[0036] Preferably, the particle sensor is installed between the pollution discharge valve and the shell, which facilitates timely detection of the concentration of particulate matter.

[0037] Preferably, the pollution discharge pipe is installed at the bottom of the shell, which facilitates the discharge of backwashing water.

[0038] In an optional embodiment, the water inlet unit comprises a first water inlet pipe and a second water inlet pipe, the first water inlet pipe is provided with a first water inlet valve, the second water inlet pipe is provided with a second water inlet valve, and the second water inlet pipe is in communication with the water outlet unit.

[0039] The first water inlet pipe is used to directly supply water to the shell as a source of filtered water, so it can be connected with any position of the shell. Preferably, the first water inlet pipe is connected with the upper half of the shell to prevent the internal water from polluting the connecting pipeline of the first water inlet pipe.

[0040] The second water inlet pipe is a water inlet pipe for backwashing, which is connected with the water outlet unit to supply water from the water outlet unit into the inside of the shell for backwashing of the filter.

[0041] In an optional embodiment, the water outlet unit comprises a water outlet pipe, a water outlet valve and a one-way valve, the water outlet pipe is in communication with the inside of the shell, and the water outlet valve and the one-way valve are both installed on the water outlet pipe, wherein it can be understood that the one-way valve is a valve that only allows water to flow out of the shell along the water outlet pipe in the present application, but since the water outlet pipe is also in communication with the second water inlet pipe, it has the function of backwashing water, therefore, the second water inlet pipe is in communication with the water outlet pipe, and the communication interface is located between the one-way valve and the shell.

[0042] The water outlet pipe can directly discharge the filtered water, and therefore the flow meter arranged thereon can reflect the clogging condition of the filter screen. Preferably, in order to facilitate the discharge of the filtered water, the water outlet pipe is installed at the bottom of the shell.

[0043] Preferably, the water outlet valve is installed on the side of the one-way valve away from the shell.

[0044] Preferably, the flow meter is installed between the one-way valve and the shell.

[0045] In a second aspect, the present application provides a continuous casting machine secondary cooling water filtering system comprising at least two continuous casting machine secondary cooling water filtering devices according to any one of the preceding embodiments, and the plurality of continuous casting machine secondary cooling water filtering devices are connected in parallel.

[0046] The above-mentioned system provided by the present application can make one of the continuous casting machine secondary cooling water filtering devices as a main filter and the rest as backup filters, when all the second filter holes of the main filter are insufficient to meet the water filtering requirement, the backup filters are switched to work and start backwashing the main filter, and when the backwashing is completed, for example, when the particle sensor detects that the particulate matter meets the standard, the backwashing is stopped, the main filter is standby, and when the working backup filter needs backwashing, the main filter is switched back to work.

[0047] Therefore, the above-mentioned system provided by the present application not only can realize the effect of prolonging the filtering working time of the continuous casting machine secondary cooling water filtering device, but also can realize water filtering and cleaning of the continuous casting machine secondary cooling water filtering device without stopping the machine, effectively realizing the goal of continuous casting efficiency.

[0048] In a third aspect, the present application provides an application of the continuous casting machine secondary cooling water filtering device according to any one of the preceding embodiments or the continuous casting machine secondary cooling water filtering system in the field of steel smelting.

[0049] The beneficial effects of the embodiments of the present application are as follows:

[0050] The application provides a continuous casting machine secondary cooling water filtering device, system and application, through improving the structure of the filter, two filter screens are used for filtering, which can improve the filtering effect of the secondary cooling water, meanwhile, the two filter screens can relatively move under the driving of a replacement assembly, since a plurality of groups of filter holes corresponding to the first filter screen are arranged on the second filter screen, when a group of second filter holes is blocked, the relative positions of the first filter screen and the second filter screen can be changed, so that the first filter holes are aligned with another group of second filter holes, and the filtering of the secondary cooling water is realized again. Since the second filter screen is arranged on the side close to the shell, the filtering process is from the second filter screen to the first filter screen, the second filter screen with a plurality of groups of second filter holes is designed, which can reduce the damage to the first filter screen, meanwhile, the second filter screen outside is easier to clean. The detection assembly can detect the blocking condition inside the shell, if it is judged that the blocking occurs, the replacement assembly is controlled to adjust the relative positions of the first filter screen and the second filter screen, so that the first filter screen and the second filter screen form a through water channel again. The structure can improve the service life of the continuous casting machine secondary cooling water filtering device, the continuous casting cooling water flow changes little, and the continuous casting efficiency is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0052] Figure 1 The structure schematic view of the continuous casting machine secondary cooling water filtering device provided by the first embodiment of the application;

[0053] Figure 2 The top view of the first filter screen and the second filter screen provided by the first embodiment of the application;

[0054] Figure 3 The side view and sectional view of the first filter screen and the second filter screen provided by the first embodiment of the application;

[0055] Figure 4 The front view of the protrusions on the second filter screen provided by the first embodiment of the application;

[0056] Figure 5 The side view of the protrusions on the second filter screen provided by the first embodiment of the application;

[0057] Figure 6 The structure schematic view of the continuous casting machine secondary cooling water filtering system provided by the second embodiment of the application.

[0058] Icon:100-continuous casting machine secondary cooling water filtering device;111-housing;121-first filter screen;1211-first filter hole;122-second filter screen;1221-second filter hole;1222-boss;1223-water filtering hole;123-sealing element;131-sealing plate;132-connector;133-lifting power element;134-limiting element;135-contact head;136-elastic element;137-adjusting screw;141-pressure sensor;142-particle sensor;143-flow meter;151-drain pipe;152-drain valve;161-first water inlet pipe;162-second water inlet pipe;163-first water inlet valve;164-second water inlet valve;171-water outlet pipe;172-water outlet valve;173-one-way valve;200-continuous casting machine secondary cooling water filtering system. DETAILED DESCRIPTION

[0059] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0060] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0061] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0062] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0063] In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0064] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0065] First embodiment

[0066] Please refer to Figure 1 The embodiment provides a continuous casting machine secondary cooling water filtering device 100, which comprises a filter and a water inlet unit, a water outlet unit and a sewage unit in communication with the filter.

[0067] The filter comprises a shell 111, a filter assembly, a replacement assembly and a detection assembly.

[0068] The filter assembly is arranged in the shell 111 and comprises a first filter screen 121, a second filter screen 122 and a sealing member 123. The first filter screen 121 and the second filter screen 122 are arranged in overlap, and the second filter screen 122 is closer to the inner wall surface of the shell 111 than the first filter screen 121; that is, the first filter screen 121 is an inner screen, and the second filter screen 122 is an outer screen. In the process of filtering water, the water passes through the second filter screen 122 and then passes through the first filter screen 121, so that impurities in the water are intercepted on the filter screen or between the second filter screen 122 and the inner wall surface of the shell 111, thereby ensuring that the flow of the continuous casting machine secondary cooling water meets the continuous casting cooling standard.

[0069] The first filter screen 121 is provided with first filter holes 1211, and the second filter screen 122 is provided with two groups of second filter holes 1221 corresponding to the positions of the first filter holes 1211. The first filter holes 1211 are distributed on the first filter screen 121 in a multi-layer and multi-column manner, and the two groups of second filter holes 1221 are alternately distributed by layers, that is, there is a layer of second filter holes 1221 of the other group between the adjacent two layers of second filter holes 1221 of the same group. As long as the first filter screen 121 is moved up or down as a whole, it can overlap with the two groups of second filter holes 1221 respectively, forming two through water paths.

[0070] Therefore, it can be understood that the number of the second filter holes 1221 is greater than the number of the first filter holes 1211, and is twice the number of the first filter holes 1211.

[0071] The second filter screen 122 is provided with a plurality of sealing grooves near one side of the first filter screen 121 for mounting an annular sealing ring. It can be understood that the sealing grooves are arranged in the non-filter hole area of the second filter screen 122 to ensure the sealing contact between the two filter screens and prevent impurities from entering between the two filter screens, which is difficult to clean.

[0072] The replacement assembly includes a lifting part and a sealing plate 131, the sealing plate 131 is in sliding connection with the shell 111 and extends along the inner surface of the shell 111 to make the sealing plate 131 in sliding sealing with the shell 111; the lifting part includes a connecting piece 132 and a lifting power piece 133, the lifting power piece 133 is an electromagnet installed on the side of the sealing plate 131 away from the inside of the shell 111, one end of the connecting piece 132 is connected with the first filter screen 121, and the opposite end is connected with the sealing plate 131, for driving the first filter screen 121 to move, so that the first filter holes 1211 are in one-to-one correspondence with each group of second filter holes 1221.

[0073] The replacement assembly is a key unit for assisting in adjusting the relative position between the first filter screen 121 and the second filter screen 122 to realize that the first filter holes 1211 are respectively aligned with multiple groups of second filter holes 1221 to form multiple groups of through water paths. The specific implementation manner is as follows: the lifting power piece 133 works to drive the sealing plate 131 to move upward as a whole. Since the sealing plate 131 is a structure extending into the shell 111, the shell 111 and the sealing plate 131 can still maintain sliding sealing during the upward movement, without affecting the water filtering process in the shell 111. The sealing plate 131 moves upward to drive the connecting piece 132 to move upward, the connecting piece 132 drives the first filter screen 121 to move upward to the position where the first filter holes 1211 are aligned with another group of second filter holes 1221, and then the lifting power piece 133 stops working. In some embodiments, if the group of second filter holes 1221 with a clean channel is below the current group of second filter holes 1221, the lifting unit can also drive the lifting power piece 133 to move downward by the same principle to drive the first filter screen 121 to move downward.

[0074] Further, the detection assembly includes a pressure sensor 141, a particle sensor 142, and a flow meter 143.

[0075] The pressure sensor 141 is arranged on the shell 111 and is used to detect the pressure inside the shell 111. When the filter screen in the continuous casting secondary cooling water filtering device 100 is blocked, the pressure in the continuous casting secondary cooling water filtering device 100 will rise, and thus the pressure change inside the shell 111 can be detected as a basis for judging whether the filter screen is blocked, so as to start the replacement assembly to adjust the filtering passage of the water between the first filter screen 121 and the second filter screen 122.

[0076] The particle sensor 142 is arranged on the blowdown unit and is used to detect the particle content in the shell 111. The blowdown unit can discharge the filtered impurities and other pollutants, and the particle content of the blowdown unit can be detected to indirectly reflect the blocking condition of the filter screen. When the particle sensor 142 detects that the particle concentration is too high, it can be considered that the filter screen is at risk of being blocked.

[0077] In addition, the particle sensor 142 can also be used as a backwashing completion detection element. That is, when the continuous casting secondary cooling water filtering device 100 is backwashed, the particles on the filter screen are washed out and discharged through the blowdown pipe 151. The particle sensor 142 detects the particle content in the blowdown pipe 151, and when the particle content reaches the use requirement, the particle sensor 142 feeds back a signal to stop the backwashing of the continuous casting secondary cooling water filtering device 100.

[0078] Specifically, the particle sensor 142 can be an acoustic wave detector.

[0079] The flow meter 143 is arranged on the water outlet unit and is used to detect the water outlet flow. The water outlet flow is a key indicator of continuous casting cooling. Only when the water outlet flow is sufficient, the continuous casting process can be effectively operated. When the filter screen is blocked by particles, the filtering performance of the continuous casting secondary cooling water filtering device 100 will be reduced, and thus the filtered water flow will be reduced. Therefore, the flow detected by the flow meter 143 can be used as a basis for judging whether the filter screen is blocked, so as to start the replacement assembly to adjust the filtering passage of the water between the first filter screen 121 and the second filter screen 122.

[0080] In an optional embodiment, the flow meter 143 and the pressure sensor 141 are used as elements for detecting whether the filter screen is blocked. The blocking condition of the filter screen is determined according to the double feedback results of the flow meter 143 and the pressure sensor 141. First, the replacement assembly is used to adjust the relative positions of the first filter screen 121 and the second filter screen 122 to obtain a new water passage. If the second filter screen 122 cannot form a new water passage with the first filter screen 121, or if the first filter screen 121 is also blocked, the backwashing is started according to the double feedback results of the flow meter 143 and the pressure sensor 141 to clean the filter screen.

[0081] Please refer to Figure 2In the embodiment, the first filter screen 121 and the second filter screen 122 are both cylindrical structures with wavy side walls, so as to increase the water filtering area.

[0082] Please refer to Figures 3 to 5 In the embodiment, the second filter screen 122 is provided with a plurality of hemispherical protrusions 1222 on the side away from the first filter screen 121, each protrusion 1222 is provided in one-to-one correspondence with a second filter hole 1221, and a plurality of water filtering holes 1223 are formed in each protrusion 1222. The protrusions 1222 increase the filtering area of the second filter screen 122 and improve the filtering efficiency.

[0083] Further, the diameters of the water filtering holes 1223 decrease in sequence from the second filter screen 122 to the first filter screen 121. Since the water flows from the second filter screen 122 to the first filter screen 121, the diameters of the water filtering holes 1223 decrease along the water flow direction, which can better filter the impurities in the water, and the particles can be easily discharged from the second filter screen 122 during backwashing.

[0084] In addition, the plurality of water filtering holes 1223 are uniformly and spacedly arranged on the protrusions 1222, and the filtering holes of the first filter screen 121 and the second filter screen 122 are also uniformly and spacedly arranged.

[0085] The diameter of the end of the second filter hole 1221 close to the first filter hole 1211 is equal to the diameter of the end of the first filter hole 1211 close to the second filter hole 1221, so as to ensure the smooth water filtering process and facilitate the alignment of the first filter screen 121 and the second filter screen 122 during the movement of the first filter screen 121.

[0086] Further, the replacement assembly further comprises a limiting part, the limiting part comprises a limiting piece 134 and a contact head 135, the limiting piece 134 is fixed to the outer wall surface of the shell 111 and is spacedly arranged with the shell 111, and the contact head 135 is fixed to the sealing plate 131 and extends out of the sealing plate 131 along the installation direction of the lifting power piece 133, so that when the lifting power piece 133 drives the sealing plate 131 to move, the limiting piece 134 and the contact head 135 limit the movement. The distance between the limiting piece 134 and the shell 111 is the distance that the lifting power piece 133 can move, therefore, when the second filter screen 122 has two groups of second filter holes 1221, the distance between the limiting piece 134 and the shell 111 can be adjusted to be equal to the distance between the two groups of second filter holes 1221 corresponding to the same first filter hole 1211.

[0087] Further, the replacement assembly further comprises an auxiliary positioning part, which comprises an elastic member 136 and an adjusting screw 137. The sealing plate 131 is provided with a through hole for mounting the adjusting screw 137, and the outer wall surface of the adjusting screw 137 in the through hole is sleeved with the elastic member 136. The other end of the adjusting screw 137 penetrates the lifting power member 133 and extends away from the sealing plate 131. The adjusting screw 137 can adjust the contraction or stretching of the elastic member 136. When the elastic member 136 is contracted, the sealing plate 131 can be resisted, preventing it from moving upward under the pressure in the shell 111, so that the sealed environment in the shell 111 is affected. In addition, the adjusting screw 137 can also adjust the contraction and downward pressing of the elastic member 136, drive the first filter screen 121 to move, change the position of the first filter screen 121, and ensure that the filter holes of the first filter screen 121 and the second filter screen 122 are aligned.

[0088] In the embodiment, the pollution discharge unit comprises a pollution discharge pipe 151 and a pollution discharge valve 152. The pollution discharge valve 152 is installed on the pollution discharge pipe 151. The pollution discharge pipe 151 is in communication with the inside of the shell 111. The particle sensor 142 is installed on the pollution discharge pipe 151. The pollution discharge pipe 151 is a pipeline for discharging particles washed out in the backwashing process.

[0089] The particle sensor 142 is installed between the pollution discharge valve 152 and the shell 111, which facilitates timely detection of the concentration of particulate matter. The pollution discharge pipe 151 is installed at the bottom of the shell 111, which facilitates the discharge of backwashing water.

[0090] In the embodiment, the water inlet unit comprises a first water inlet pipe 161 and a second water inlet pipe 162. The first water inlet pipe 161 is provided with a first water inlet valve 163. The second water inlet pipe 162 is provided with a second water inlet valve 164. The second water inlet pipe 162 is in communication with the water outlet unit.

[0091] The first water inlet pipe 161 is used to directly supply water to the shell 111, serving as the source of filtered water. In the embodiment, the first water inlet pipe 161 is connected with the upper half of the shell 111, preventing the internal water from polluting the connecting pipeline of the first water inlet pipe 161.

[0092] The second water inlet pipe 162 is a backwashing water inlet pipe, which is connected with the water outlet unit. Water from the water outlet unit enters the inside of the shell 111, backwashing the filter.

[0093] In the embodiment, the water outlet unit comprises a water outlet pipe 171, a water outlet valve 172 and a one-way valve 173, the water outlet pipe 171 is in communication with the inside of the shell 111, and the water outlet valve 172 and the one-way valve 173 are both installed on the water outlet pipe 171. It can be understood that the one-way valve 173 is a valve that only allows water to flow out of the shell 111 along the water outlet pipe 171 in the present application, but since the water outlet pipe 171 is also in communication with the second water inlet pipe 162, it has the function of backwashing water, therefore, the second water inlet pipe 162 is in communication with the water outlet pipe 171, and the communication interface is located between the one-way valve 173 and the shell 111.

[0094] The water outlet pipe 171 can directly discharge the filtered water, and therefore the flow meter 143 installed thereon can reflect the clogging condition of the filter screen. In order to facilitate the discharge of the filtered water, the water outlet pipe 171 is installed at the bottom of the shell 111. The water outlet valve 172 is installed on the side of the one-way valve 173 away from the shell 111. The flow meter 143 is installed between the one-way valve 173 and the shell 111.

[0095] The continuous casting machine secondary cooling water filtering device 100 provided in the embodiment has the following working principle:

[0096] Please refer to the left structure in Figure 3 , the arrow indicates the flow direction of water during filtering, and taking the example of the second filter hole 1221 and the first filter hole 1211 being aligned in the lower position, it is cooperated with reference to Figure 1 , the first water inlet valve 163 is opened, the water outlet valve 172 and the blowdown valve 152 are closed, water enters the shell 111 from the first water inlet pipe 161, and the water passes through the second filter hole 1221 and the first filter hole 1211 for filtering, the filtered water flows out along the water outlet pipe 171, and the flow meter 143 timely detects the flow of water in the water outlet pipe 171 to judge the clogging condition of the filter screen.

[0097] When the flow meter 143 shows that the flow of water decreases and the pressure sensor 141 detects that the pressure in the shell 111 increases, it is judged that the current group of second filter holes 1221 of the second filter screen 122 is clogged, the first water inlet valve 163 is closed, and the lifting power member 133 drives the sealing plate 131 to move upward, that is, the electromagnet is powered to drive the sealing plate 131 to move upward, until the contact head 135 contacts the limiting member 134, and the lifting power member 133 stops driving. At this time, since the sealing plate 131 moves upward, the connecting member 132 moves upward, and then drives the first filter screen 121 to move upward, the first filter hole 1211 is aligned with a new group of second filter holes 1221 above the second filter screen 122, that is, the gap between the adjacent first filter hole 1211 and the second filter hole 1221 is the distance between the limiting member 134 and the sealing plate 131. After the first filter hole 1211 is aligned with the new group of second filter holes 1221, a new through water path is formed, which is cooperated with reference to Figure 3The right structure, the arrow also indicates the flow direction of water when filtering, open the first water inlet valve 163 to continue water, at this time, due to the second filter hole 1221 is not blocked, the pressure sensor 141 shows normal, the flow meter 143 detects normal flow, the continuous casting machine two cooling water filtering device 100 continues to run.

[0098] When the flow meter 143 detects that the flow of water is reduced again, and the pressure sensor 141 detects that the pressure in the shell 111 is increased again, it is judged that the current group of second filter holes 1221 of the second filter screen 122 is blocked, that is, both groups of second filter holes 1221 of the second filter screen 122 are blocked, at this time, backwashing operation is needed to clean the continuous casting machine two cooling water filtering device 100, as follows: close the first water inlet valve 163, open the second water inlet valve 164 and the blowdown valve 152, water enters the shell 111 from the second water inlet pipe 162 through the water outlet pipe 171 and the flow meter 143, and backwashing of the filter screen is started, water flows out along the direction from the first filter screen 121 to the second filter screen 122, and carries away the particulate matter and other impurities on the first filter screen 121 and the second filter screen 122, and then flows out along the blowdown pipe 151, when the particulate sensor 142 on the blowdown pipe 151 detects that the content of particulate matter meets the standard, the second water inlet valve 164 is closed to stop water, and after the water in the shell 111 is discharged, the blowdown valve 152 is closed, and the cleaning of the continuous casting machine two cooling water filtering device 100 is completed.

[0099] The continuous casting machine two cooling water filtering device 100 provided in the embodiment has at least the following advantages:

[0100] By improving the structure of the filter, two filter screens are used for filtering, which can not only improve the filtering effect of the secondary cooling water, but also enable the two filter screens to move relatively under the driving of the replacement assembly. Since the second filter screen 122 is provided with two groups of filter holes corresponding to the first filter screen 121, when one group of second filter holes 1221 is blocked, the relative position of the first filter screen 121 and the second filter screen 122 can be changed, so that the first filter holes 1211 are aligned with another group of second filter holes 1221, and the filtering of the secondary cooling water is realized again. Since the second filter screen 122 is arranged on the side close to the shell 111, the filtering process is from the second filter screen 122 to the first filter screen 121, and it will be easier to block the second filter screen 122. Designing multiple groups of second filter holes 1221 in the second filter screen 122 can also reduce the damage to the first filter screen 121, and at the same time, the external second filter screen 122 is also easier to clean. The detection assembly can detect the blocking condition inside the shell 111, and if it is judged that blocking occurs, the replacement assembly adjusts the relative position of the first filter screen 121 and the second filter screen 122, so that the first filter screen 121 and the second filter screen 122 form a through waterway again. This structure can improve the service life of the continuous casting secondary cooling water filtering device 100, reduce the change of the continuous casting cooling water flow, and ensure the high efficiency of continuous casting.

[0101] Second embodiment

[0102] Please refer to Figure 6 The embodiment provides a continuous casting secondary cooling water filtering system 200, which comprises two continuous casting secondary cooling water filtering devices 100 of the first embodiment, and the two continuous casting secondary cooling water filtering devices 100 are connected in parallel.

[0103] The above-mentioned system provided by the embodiment can make one of the two continuous casting secondary cooling water filtering devices 100 as a main filter, for example, Figure 6 The left continuous casting secondary cooling water filtering device 100 in the middle is a main filter, and the right continuous casting secondary cooling water filtering device 100 is a standby filter. When the two groups of second filter holes 1221 of the main filter are insufficient to meet the filtering requirements, the standby filter is switched to work, and backwashing of the main filter is started. When the particulate sensor 142 detects that the particulate matter meets the standard, the backwashing is stopped, the main filter is standby, and when the standby filter in work needs backwashing, the main filter is switched to work again.

[0104] Therefore, the above-mentioned system provided by the embodiment not only can realize the effect of prolonging the filtering working time of the continuous casting secondary cooling water filtering device 100, but also can realize filtering and cleaning of the continuous casting secondary cooling water filtering device 100 without stopping the machine, and effectively realizes the goal of high efficiency of continuous casting.

[0105] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A secondary cooling water filtering device for a continuous casting machine, characterized by, The filter and a water inlet unit, a water outlet unit and a blowdown unit in communication with the filter are included. The filter includes a housing, a filter assembly, a replacement assembly and a detection assembly. The filter assembly is arranged in the housing and includes a first filter screen, a second filter screen and a sealing member. The first filter screen and the second filter screen are arranged in an overlapping manner, and the second filter screen is arranged close to the inner wall of the housing relative to the first filter screen. The first filter screen is provided with first filter holes, and the second filter screen is provided with at least two groups of second filter holes corresponding to the first filter holes.

2. The continuous casting machine secondary cooling water filtering device according to claim 1, characterized by, The replacement assembly includes a lifting part and a sealing plate.

3. The continuous caster secondary cooling water filtering device according to claim 2, characterized by, The sealing plate is slidably connected with the housing and extends along the inner surface of the housing to achieve sliding sealing between the sealing plate and the housing.

4. The continuous caster secondary cooling water filtering device according to claim 2, characterized by, The lifting part includes a connecting member and a lifting power member.

5. The continuous caster secondary cooling water filtering device according to claim 2, characterized by, One end of the connecting member is connected with the first filter screen, and the opposite end is connected with the sealing plate to drive the first filter screen to move so that the first filter holes correspond to each group of second filter holes.

6. The continuous caster secondary cooling water filtering device according to claim 2, wherein The detection assembly includes at least one of a pressure sensor, a particle sensor or a flow meter.

7. The continuous caster secondary cooling water filtering device according to claim 2, wherein The pressure sensor is arranged on the housing to detect the pressure inside the housing.

8. The secondary cooling water filtering device of a continuous caster according to claim 1, wherein The particle sensor is arranged on the blowdown unit to detect the particle content discharged from the housing.

9. The secondary cooling water filtering device of a continuous caster according to claim 1 or 8, characterized by, The flow meter is arranged on the water outlet unit to detect the water outlet flow. The second filter screen is provided with a plurality of protrusions corresponding to the second filter holes. The filter water holes on the protrusions are arranged in a decreasing diameter from the second filter screen to the first filter screen. The filter water holes on the protrusions are evenly spaced. The filter holes of the first filter screen and the second filter screen are evenly spaced. The diameter of one end of the second filter hole close to the first filter hole is equal to the diameter of one end of the first filter hole close to the second filter hole. The first filter screen and the second filter screen are both barrel-shaped structures with a plurality of curved arcs on the side walls. The replacement assembly further includes a limiting part. The limiting part includes a limiting member and a contact head. The limiting member is fixed to the outer wall of the housing and is spaced apart from the housing. The contact head is fixed to the sealing plate and extends out of the sealing plate along the installation direction of the lifting power member. The replacement assembly further includes an auxiliary positioning part. The auxiliary positioning part includes an elastic member and an adjusting screw. The sealing plate is provided with a through hole for installing the adjusting screw, and the outer wall of the adjusting screw in the through hole holds the elastic member. The other end of the adjusting screw passes through the lifting power member and extends away from the sealing plate.

10. The secondary cooling water filtering device of a continuous caster according to claim 1, wherein The blowdown unit comprises a blowdown pipe and a blowdown valve, the blowdown valve is installed on the blowdown pipe, the blowdown pipe is communicated with the inside of the shell, and the particle sensor is installed on the blowdown pipe.

11. The continuous caster secondary cooling water filtering device according to claim 10, characterized by, The particle sensor is installed between the blowdown valve and the shell.

12. The continuous caster secondary cooling water filtering device according to claim 10, wherein The blowdown pipe is installed at the bottom of the shell.

13. The secondary cooling water filtering device of a continuous caster according to claim 1, characterized by, The water inlet unit comprises a first water inlet pipe and a second water inlet pipe, the first water inlet pipe is provided with a first water inlet valve, the second water inlet pipe is provided with a second water inlet valve, and the second water inlet pipe is communicated with the water outlet unit.

14. The continuous caster secondary cooling water filtering device according to claim 13, characterized by, The water outlet unit comprises a water outlet pipe, a water outlet valve and a one-way valve, the water outlet pipe is communicated with the inside of the shell, the water outlet valve and the one-way valve are both installed on the water outlet pipe, the second water inlet pipe is communicated with the water outlet pipe, and the communication interface is located between the one-way valve and the shell.

15. The continuous caster secondary cooling water filtering device according to claim 14, characterized by, The water outlet valve is installed on the side of the one-way valve away from the shell.

16. The continuous caster secondary cooling water filtering device according to claim 14, characterized by, The flow meter is installed between the one-way valve and the shell.

17. The secondary cooling water filtering device of a continuous caster according to claim 1, characterized by, The second filter screen is provided with a plurality of sealing grooves on the side close to the first filter screen, for installing the sealing member.

18. The continuous caster secondary cooling water filtering device according to claim 17, characterized by, The sealing member is a ring-shaped sealing ring.

19. A continuous-casting secondary cooling water filtration system characterized by comprising: The application relates to a continuous casting machine secondary cooling water filtering device.

20. Application of the continuous casting machine secondary cooling water filtering device or the continuous casting machine secondary cooling water filtering system in the field of steel smelting.

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