Filter and filtering system in front of steelmaking continuous casting machine

Abstract

The invention relates to the technical field of filtering, and provides a steel-making continuous casting machine front filter and a filtering system. The steel-making continuous casting machine front filter comprises a shell assembly and a shell assembly, a first cavity and a second cavity are formed in the shell assembly, the shell assembly is provided with a first connector and a second connector, the first connector is communicated with the second cavity, and the second connector is communicated with the first cavity; a third cavity is formed in the filter element, one side of the third cavity is communicated with the first connector through the filter tank, and the other side of the third cavity is communicated with the second connector; in the stretching state, the contact area of the filter tank and the first cavity is a first area; in the compaction state, the contact area of the filter tank and the first cavity is a second area; the first area is larger than the second area. The filter in front of the steelmaking continuous casting machine and the filtering system overcome the defects that a filter in front of the steelmaking continuous casting machine in the prior art is prone to blockage and difficult to clean in the using process, and the filter in front of the steelmaking continuous casting machine and the filtering system can conveniently clean blockages.

Description

Technical Field

[0001] The invention relates to the technical field of filtering, and in particular to a pre-filter and filtering system for a steelmaking continuous casting machine. Background Art

[0002] The main function of the filter system before the steelmaking continuous casting machine is to filter the secondary cooling water before it enters the nozzle of the continuous casting machine to prevent the nozzle from being blocked, which will affect the cooling mechanism of the continuous casting machine and the quality of the ingot. The filter before the steelmaking continuous casting machine is the main body of its filter system. The existing filter before the steelmaking continuous casting machine is prone to blockage and difficult to clean during use, thus affecting the normal production and product quality of the steelmaking continuous casting machine. Summary of the invention

[0003] The present invention provides a pre-filter and a filtering system for a steel-making continuous casting machine, which are used to solve the defects in the prior art that the pre-filter of a steel-making continuous casting machine is easily clogged and difficult to clean during use, and realize a pre-filter and a filtering system for a steel-making continuous casting machine that can easily clean the clogged objects.

[0004] The present invention provides a pre-filter for a steelmaking continuous casting machine, comprising: A shell assembly having a first cavity and a second cavity inside, wherein the shell assembly is provided with a first interface and a second interface, wherein the first interface is communicated with the second cavity, and the second interface is communicated with the first cavity; A filter element having a third cavity inside, the filter element is arranged inside the first cavity, a plurality of filter slots are arranged on the side wall of the filter element, one side of the third cavity is connected to the first interface through the filter slots, and the other side of the third cavity is connected to the second interface; Wherein, the filter element is used to switch between an extended state and a compacted state. In the extended state, the contact area between the filter trough and the first cavity is a first area; in the compacted state, the contact area between the filter trough and the first cavity is a second area; the first area is larger than the second area.

[0005] According to a steelmaking continuous casting machine pre-filter provided by the present invention, the filter element comprises a spiral structure, and the spiral structure has a plurality of coil layers connected end to end in sequence; In the stretched state, there is a gap between two adjacent ring layers, and in the compacted state, two adjacent ring layers are in contact with each other; At least part of the surface of the ring layer has a plurality of filter grooves.

[0006] A pre-filter for a steelmaking continuous casting machine provided by the present invention further comprises: A limiting assembly is arranged inside the first cavity, the limiting assembly has a limiting space inside, the filter element is located in the limiting space, and an opening is arranged at the bottom of the limiting assembly; A barrier seat, which is arranged inside the first cavity and connected to the bottom of the limit assembly, the barrier seat is used to fix the limit assembly, and the second cavity is located inside the barrier seat; A reset component is arranged in the limit space, and one end of the reset component abuts against the top of the limit component, and the other end abuts against the top of the filter element, and the reset component is used to maintain the filter element in the compacted state; a valve seat, disposed at the opening, the valve seat having a first flow channel and a second flow channel, the second flow channel being disposed outside the first flow channel, and both ends of the first flow channel and the second flow channel being respectively connected to the third cavity and the second cavity; A backwash valve, wherein the first end of the backwash valve is connected to the reset assembly, the second end of the backwash valve is arranged in the first flow channel, and the backwash valve is used to switch between a first position and a second position; in the first position, the filter element is in the stretched state, and the second end of the backwash valve is blocked in the first flow channel; in the second position, the filter element is maintained in the compacted state, and the second end of the backwash valve cancels the blockage of the first flow channel.

[0007] According to a steelmaking continuous casting machine pre-filter provided by the present invention, the limiting assembly comprises: A gland, detachably disposed on the top of the housing assembly, for sealing the top of the housing assembly; A plurality of limiting rods penetrate the pressure cover and the top of the shell assembly, the plurality of limiting rods are arranged at intervals in a closed shape, the middle of the plurality of limiting rods constitutes the limiting space, and the bottoms of the plurality of limiting rods are detachably connected to the barrier seat.

[0008] According to a steelmaking continuous casting machine pre-filter provided by the present invention, the baffle seat comprises: A fixing ring, to which the bottom end of the limiting rod is connected; A barrier cylinder is arranged at the bottom of the fixing ring, the bottom of the barrier cylinder is sealedly connected to the bottom of the shell assembly, and the interior of the barrier cylinder constitutes the second cavity; A plurality of connecting members are arranged at intervals on the outer circumference of the fixing ring, and a side of the connecting member away from the fixing ring is connected to the inner wall of the shell assembly.

[0009] According to a steelmaking continuous casting machine pre-filter provided by the present invention, the reset component comprises: An upper cover, arranged on the top of the limiting assembly; An elastic member, movably arranged inside the upper cover; The lower cover has one end abutting against the filter element and the other end abutting against the elastic member, and the backwash valve is connected to the lower cover.

[0010] According to a pre-filter of a steelmaking continuous casting machine provided by the present invention, the valve seat comprises: a valve sleeve, wherein the first flow channel is located inside the valve sleeve; A valve outer sleeve, which is arranged on the outer periphery of the valve sleeve and has a gap between the valve outer sleeve and the valve sleeve; A plurality of blades are arranged in a spiral shape and spaced apart between the valve sleeve and the valve outer sleeve, and the second flow channel is formed between two adjacent blades.

[0011] According to a steelmaking continuous casting machine pre-filter provided by the present invention, the backwash valve comprises: A valve body, movably disposed inside the valve sleeve and located above the first interface; A limiting portion is arranged in the middle of the valve body and is spaced apart from the valve body; A plurality of rib plates are arranged between the valve body and the limiting portion, and a water-passing gap is arranged between the plurality of rib plates; A blind plate is provided at the bottom of the valve body, and in the first position, the blind plate is sealed at the bottom of the valve sleeve; A plurality of water holes are arranged at intervals on the side wall of the valve body; An adjusting rod, wherein a first end of the adjusting rod is connected to the limiting portion, and a second end of the adjusting rod is connected to the lower cover.

[0012] A pre-filter of a steelmaking continuous casting machine provided according to the present invention also includes a backblowing assembly, wherein the backblowing assembly is provided with a plurality of nozzles, wherein the plurality of nozzles are connected in series through an air supply ring, wherein the air supply ring is connected to an air intake pipe, and wherein the air intake pipe is connected to an air blowing system; the plurality of nozzles are used to form a vortex at the top of the baffle cylinder.

[0013] The present invention also provides a filtering system, comprising: The water inlet pipe is provided with a first water valve; The main drainage pipe is equipped with a second water valve; The jellyfish production pipeline is provided with a third water valve, and the water inlet jellyfish pipeline, the water discharge jellyfish pipeline and the jellyfish production pipeline are arranged in parallel with each other; A plurality of pre-filters for steel-making continuous casting machines as described in any one of the above embodiments, wherein the plurality of pre-filters for steel-making continuous casting machines are arranged in parallel, wherein the pre-filters for steel-making continuous casting machines are connected to the water inlet main pipe and the water discharge main pipe through the second interface, and the pre-filters for steel-making continuous casting machines are connected to the water producing main pipe through the first interface.

[0014] The pre-filter of the steelmaking continuous casting machine provided by the present invention can adjust the filter element to a compacted state when filtering is required, so that the area of ​​the filter tank and the first cavity becomes smaller, which can increase the density of filtering, thereby better filtering. When the filter element needs to be cleaned, the filter element can be adjusted to a stretched state, so that the filter tank can be better exposed to the inside of the first cavity, so that the filtered material retained on the filter tank can be better cleaned. With such an arrangement, when the filter element needs to be cleaned, it is not necessary to disassemble the filter element for separate cleaning. It only needs to adjust the state of the filter element to clean it inside the housing assembly, which greatly improves the convenience of cleaning the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a cross-sectional view of a pre-filter of a steel-making continuous casting machine provided by the present invention.

[0017] Figure 2 The present invention is a top view of a filter element of a front filter of a steelmaking continuous casting machine.

[0018] Figure 3 The present invention is a cross-sectional view of a baffle seat of a front filter of a steel-making continuous casting machine.

[0019] Figure 4 The utility model is a top view of the baffle seat of the front filter of the steel-making continuous casting machine provided by the present invention.

[0020] Figure 5 The present invention is a schematic structural diagram of a reset assembly for a pre-filter of a steelmaking continuous casting machine.

[0021] Figure 6 This is one of the partial structural schematic diagrams of the pre-filter of the steel-making continuous casting machine provided by the present invention.

[0022] Figure 7 This is the second partial structural schematic diagram of the pre-filter of the steelmaking continuous casting machine provided by the present invention.

[0023] Figure 8 It is a cross-sectional view of a valve seat of a pre-filter of a steelmaking continuous casting machine provided by the present invention.

[0024] Fig. 9 The present invention is a top view of a valve seat of a front filter of a steelmaking continuous casting machine.

[0025] Fig.10 The invention discloses a cross-sectional view of a backwash valve of a front filter of a steel-making continuous casting machine.

[0026] Fig.11 The utility model is a top view of the backwash valve of the front filter of the steel-making continuous casting machine provided by the present invention.

[0027] Fig.12 It is a cross-sectional view of the cover body of the pre-filter of the steel-making continuous casting machine provided by the present invention.

[0028] Fig.13 The present invention is a top view of the cover body of the front filter of the steel-making continuous casting machine.

[0029] Fig.14 It is a structural schematic diagram of the filtering system provided by the present invention from a first perspective.

[0030] Fig.15 It is a structural schematic diagram of the filtering system provided by the present invention from a second viewing angle.

[0031] Reference numerals: 100: housing assembly; 110: first cavity; 120: filter housing; 130: second cavity; 140: first interface; 150: second interface; 160: interface seat; 161: cover body; 162: raised portion; 163: sealing ring; 164: limiting hole; 165: fixing hole; 170: water inlet pipe; 171: first water valve; 180: water outlet pipe; 181: second water valve; 190: water production pipe; 191: third water valve; 200: filter element; 210: third cavity; 220: filter tank; 300: reset assembly; 310: upper cover; 320: elastic member; 330: lower cover; 340: snap spring; 400: driving assembly; 410: cylinder bracket; 420: cylinder; 430: control system; 431: forming controller; 432: air guide pipe; 433: five-position three-way solenoid valve; 434: air source triplex; 435: first air valve; 436: second air valve; 437: differential pressure transmitter; 500: valve seat; 510: valve sleeve; 520: valve outer sleeve; 530: fan blade; 600: backwash valve; 610: valve body; 620: limiter; 630: rib plate; 640: blind plate; 650: water hole; 660: adjustment rod; 700: barrier seat; 710: barrier cylinder; 720: fixing ring; 730: connecting piece; 800: backflush assembly; 810: air inlet pipe; 820: air delivery ring; 830: nozzle; 900: limit assembly; 910: pressure cover; 920: limit rod. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] Combine the following Figure 1-Figure 15 The structure and working principle of the present invention are described.

[0038] Reference Figure 1 The steelmaking continuous casting machine pre-filter provided by the present invention comprises a housing assembly 100 and a filter element 200. The housing assembly 100 has a first cavity 110 and a second cavity 130 inside. The housing assembly 100 is provided with a first interface 140 and a second interface 150. The first interface 140 is communicated with the second cavity 130, and the second interface 150 is communicated with the first cavity 110. The filter element 200 has a third cavity 210 inside. The filter element 200 is arranged inside the first cavity 110. The filter element 200 A plurality of filter slots 220 are provided on the side wall, one side of the third cavity 210 is connected with the first interface 140 through the filter slot 220, and the other side of the third cavity 210 is connected with the second interface 150; wherein, the filter element 200 is used to switch between an expanded state and a compacted state, in which, in the expanded state, the contact area between the filter slot 220 and the first cavity 110 is a first area; in the compacted state, the contact area between the filter slot 220 and the first cavity 110 is a second area; the first area is greater than the second area.

[0039] In the above structure, when filtering is required, the filter element 200 can be adjusted to a compacted state, so that the area of ​​the filter tank 220 and the first cavity 110 becomes smaller, which can increase the density of filtering and thus perform better filtering. When the filter element 200 needs to be cleaned, the filter element 200 can be adjusted to a stretched state, so that the filter tank 220 can be better exposed to the inside of the first cavity 110, so that the filtered material retained on the filter tank 220 can be better cleaned. With such an arrangement, when the filter element 200 needs to be cleaned, it is not necessary to disassemble the filter element 200 for separate cleaning. It is only necessary to adjust the state of the filter element 200 to clean it inside the housing assembly 100, which greatly improves the convenience of cleaning the filter element 200.

[0040] Specifically, when filtering is required, the filter element 200 is first adjusted to a compacted state. After the water to be filtered enters the first cavity 110 through the second interface 150, it is filtered through the filter slot 220 on the side wall of the filter element 200 and then enters the third cavity 210 inside the filter element 200. When passing through the filter slot 220, since the gap of the filter slot 220 is small, the water to be filtered can be filtered. The filtered clean water then enters the first interface 140 through the second cavity 130 and is then discharged through the first interface 140. When the filter element 200 needs to be cleaned, the valve of the water to be filtered is first closed to stop the supply of the water to be filtered. Then adjust the filter element 200 to the stretched state, and then flush clean water into the second cavity 130 through the first interface 140. The clean water flows from the second cavity 130 to the third cavity 210 in the filter element 200. Since the filter element 200 is in the stretched state at this time, the contact area between the filter tank 220 and the first cavity 110 increases, that is, the flushing area with the clean water increases, and the filtered material remaining on the filter tank 220 is effectively flushed away, and the flushed filtered material is discharged from the second interface 150 along with the clean water.

[0041] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the filter element 200 adopts a spiral structure design, which is composed of multiple coils connected end to end. When the filter element 200 is in a stretched state, there is a certain gap between two adjacent coils; when the filter element 200 is compressed to a compacted state, these coils will be in close contact with each other. At least some of the coils are provided with multiple filter grooves 220 on the surface for filtering impurities in the fluid.

[0042] The design of the filter element 200 is similar to that of a spring, but unlike an ordinary spring, the upper and lower surfaces of each coil layer are flat. In addition, the filter element 200 is made of an elastic material. This design allows adjacent coil layers to fit together flatly when pressure is applied to the filter element, thereby achieving a compact compaction state. When the external pressure is released, the filter element 200 can rely on its own elasticity to return to its original stretched state, so that the filter slots 220 between the coil layers are fully exposed in the first cavity 110. This not only helps to improve the filtration efficiency, but also facilitates the removal of filter residues blocked in the filter slots 220.

[0043] Reference Figure 1In some embodiments of the present invention, the pre-filter of the steelmaking continuous casting machine further includes a reset assembly 300, a valve seat 500, a backwash valve 600, a stopper seat 700 and a limit assembly 900. Among them, the limit assembly 900 is detachably arranged inside the first cavity 110, and the interior of the limit assembly 900 has a limit space, and the filter element 200 is located in the limit space. The limit space is mainly used to limit the filter element 200 in the horizontal direction to prevent the filter element 200 from moving in the horizontal direction, and the limit space also limits the movement of the filter element 200 in the vertical direction. The bottom of the limit assembly 900 is provided with an opening, so as to facilitate the communication between the filter element 200 and the second cavity 130. The stopper seat 700 is detachably or fixedly arranged inside the first cavity 110, and is detachably connected to the bottom of the stopper assembly 900, so as to achieve the fixation of the bottom of the stopper assembly 900, and the second cavity 130 is located inside the stopper seat 700.

[0044] In some possible embodiments, the housing assembly 100 includes a filter housing 120 and an interface seat 160. The filter housing 120 is a cylindrical structure with openings at the top and bottom. Since the top of the reset assembly 300 is located at the opening at the top of the first cavity 110, it can be closed. The interface seat 160 is detachably arranged at the opening at the bottom of the filter housing 120 by bolts to achieve the closure of the bottom opening of the filter housing 120. At the same time, the first interface 140 is arranged at the bottom of the interface seat 160, and the second interface 150 is arranged on the side of the interface seat 160.

[0045] The reset assembly 300 is arranged in the limit space, and one end of the reset assembly 300 abuts against the top of the limit assembly 900, and the other end abuts against the top of the filter element 200. The reset assembly 300 is used to maintain the filter element 200 in a compacted state; the valve seat 500 is arranged at the opening, and the valve seat 500 has a first flow channel and a second flow channel, the second flow channel is arranged outside the first flow channel, and the respective ends of the first flow channel and the second flow channel are respectively connected to the third cavity 210 and the second cavity 130; the first end of the backwash valve 600 is connected to the The reset assembly 300 is connected, and the second end of the backwash valve 600 is arranged in the first flow channel, and the backwash valve 600 is used to switch between the first position and the second position; in the first position, the first end of the backwash valve 600 drives the reset assembly 300 away from the filter element 200, so that the filter element 200 is adjusted from a compacted state to a stretched state, and the second end of the backwash valve 600 is blocked in the first flow channel; in the second position, the filter element 200 is maintained in a compacted state, and the second end of the backwash valve 600 cancels the blockage of the first flow channel.

[0046] In the above structure, when the filter element 200 needs to be cleaned, clean water enters from the first interface 140. Under the action of water pressure, the backwash valve 600 moves upward, that is, moves from the first position to the second position. At this time, the backwash valve 600 drives the reset assembly 300 away from the filter element 200, thereby providing space for the expansion of the filter element 200. In this process, the filter element 200 is gradually adjusted from a compacted state to an expanded state. When the backwash valve 600 moves to the second position, the filter element 200 is in the best expanded state. And the backwash valve 600 blocks the first flow channel, and at this time, clean water can only enter the interior of the third cavity 210 from the second flow channel.

[0047] Reference Figure 1 In some embodiments of the present invention, the limiting assembly 900 includes a pressure cover 910 and a plurality of limiting rods 920. The pressure cover 910 is detachably disposed on the top of the shell assembly 100 and is used to seal the top of the shell assembly 100. The plurality of limiting rods 920 penetrate the pressure cover 910 and the top of the shell assembly 100. The plurality of limiting rods 920 are arranged at intervals in a closed shape. The middle of the plurality of limiting rods 920 constitutes a limiting space. The bottoms of the plurality of limiting rods 920 are detachably connected to the barrier seat 700.

[0048] Specifically, the pressure cover 910 is a plate-like structure, and is adapted to the shape of the bottom opening of the filter housing 120, so that it can be sealed. The pressure cover 910 is detachably arranged at the bottom of the filter housing 120 by bolts. The limiting rod 920 extends downward through the pressure cover 910, thereby connecting with the barrier seat 700. The limiting space surrounded by multiple limiting rods 920 is adapted to the shape of the filter element 200. When the filter element 200 is a cylindrical structure, multiple limiting rods 920 are arranged in a circular array. And the diameter of the limiting space is adapted to the outer diameter of the filter element 200, so as to prevent the filter element 200 from shaking left and right in the limiting space. The bottom of the limiting rod 920 is inserted into the barrier seat 700, or is threadedly connected to the barrier seat 700, thereby achieving Reference Figure 3 and Figure 4 In some embodiments of the present invention, the barrier seat 700 includes a barrier cylinder 710, a fixing ring 720 and a plurality of connecting members 730. The bottom end of the limiting rod 920 is connected to the fixing ring 720; the barrier cylinder 710 is arranged at the bottom of the fixing ring 720, the bottom of the barrier cylinder 710 is sealed and connected to the bottom of the shell assembly 100, and the interior of the barrier cylinder 710 constitutes a second cavity 130; a plurality of connecting members 730 are arranged at intervals on the outer periphery of the fixing ring 720, and the side of the connecting member 730 away from the fixing ring 720 is connected to the inner wall of the shell assembly 100.

[0049] Specifically, the barrier cylinder 710 is a cylindrical structure, and the fixing ring 720 is a circular ring structure, and the fixing ring 720 is fixedly installed on the top of the barrier cylinder 710. The bottom of the fixing ring 720 is provided with a plurality of limiting holes for connecting with the bottom of the limiting rod 920, thereby fixing the bottom of the limiting rod 920. The connecting piece 730 is a plate-like structure, and its outer side is conveniently arc-shaped, and the arc is adapted to the arc of the inner wall of the first cavity 110, so that the connecting piece 730 can be more tightly connected to the inner wall of the first cavity 110.

[0050] Reference Figures 5 to 7 In some embodiments of the present invention, the reset assembly 300 includes an upper cover 310, an elastic member 320 and a lower cover 330. The upper cover 310 is disposed on the top of the stop assembly 900; the elastic member 320 is movably disposed inside the upper cover 310; one end of the lower cover 330 abuts against the filter element 200, and the other end abuts against the elastic member 320. The backwash valve 600 passes through the lower cover 330 and is detachably connected to the lower cover 330 via a retaining spring 340.

[0051] Specifically, the upper cover 310 is an inverted U-shaped structure. The elastic member 320 can be set as a structure of two semi-cylinders, or set as a cylindrical structure with a through hole in the middle. The size of the elastic member 320 needs to enable it to be located inside the groove of the upper cover 310. The lower cover 330 is also a cylindrical structure, and a convex portion is provided at the bottom, and the diameter of the convex portion is greater than the diameter of the bottom opening of the upper cover 310, so that the lower cover 330 can be prevented from entering the interior of the upper cover 310, and the elastic member 320 can be limited to the interior of the upper cover 310. When the filter element 200 needs to be cleaned, under the impact of clean water, the backwash valve 600 moves upward, thereby driving the lower cover 330 to move upward, thereby squeezing the elastic member 320, and then providing space for the expansion of the filter element 200. The filter element 200 is adjusted to a stretched state under the action of its own elasticity. When filtering, since the liquid moves from top to bottom, it will drive the backwash valve 600 to move downward. As a result, the backwash valve 600 cancels the force exerted on the lower cover 330 , and under the action of the elastic member 320 , the lower cover 330 is pressed downward, and then the filter element 200 is pressed, so that the filter element 200 is adjusted to a compacted state.

[0052] It should be noted that, in the above structure, the elasticity of the elastic member 320 is greater than the elasticity of the filter element 200. In other embodiments, the present invention is further provided with a drive assembly 400, which includes a cylinder bracket 410, which is detachably arranged at the bottom of the gland 910, and the cylinder 420 is arranged on the cylinder bracket 410. The cylinder bracket 410 can make linear motion, and the output shaft of the cylinder bracket 410 is connected to the backwash valve 600, which can drive the backwash valve 600 to move up and down, that is, drive the backwash valve 600 to switch between the first position and the second position.

[0053] With such arrangement, the backwash valve 600 can be adjusted at any time. In addition, the drive assembly 400 is also provided with a control system 430, and the control system 430 includes a controller 431, and the controller 431 is connected to the drive shaft of the cylinder 420, so that the stroke of the cylinder 420 can be recorded. The control system 430 also includes an air guide pipe 432, which is connected to the cylinder 420 and is used to control the movement of the cylinder 420. A five-position three-way solenoid valve 433 and an air source triplet 434 are provided on the air guide pipe 432, wherein the five-position three-way solenoid valve 433 is used to control the flow direction of the air flow in the air guide pipe 432, and the air source triplet 434 is used for gas pressure, thereby driving the operation of the cylinder 420. The control system 430 also includes a differential pressure transmitter 437, and the differential pressure transmitter 437 is used to detect the pressure difference between the first interface 140 and the second interface 150. The differential pressure transmitter 437 is connected to the inside of the first interface 140 and the second interface 150 through two channels, and the two channels are provided with a first gas valve 435. A second gas valve 436 is also provided between the two channels. The differential pressure transmitter 437 is connected to the signal of the five-position three-way solenoid valve 433, and can control the operation of the cylinder 420 according to the pressure difference.

[0054] Reference Figure 8 and Fig. 9 In some embodiments of the present invention, the valve seat 500 includes a valve sleeve 510, a valve outer sleeve 520 and a plurality of blades 530, and the first flow channel is located inside the valve sleeve 510; the valve outer sleeve 520 is arranged on the outer periphery of the valve sleeve 510, and a gap is provided between the valve sleeve 510; the plurality of blades 530 are arranged in a spiral shape between the valve sleeve 510 and the valve outer sleeve 520, and a second flow channel is formed between two adjacent blades 530.

[0055] When the filter element 200 needs to be cleaned, the first flow channel is closed, and clean water can only enter from the second flow channel. The second flow channel is formed between the plurality of blades 530, and the plurality of blades 530 are arranged in a vortex shape between the valve sleeve 510 and the valve outer sleeve 520. Therefore, when clean water passes through the second flow channel, a vortex is formed inside the third cavity 210, thereby generating a greater flushing force, and thus the filter element 200 can be cleaned more thoroughly.

[0056] Reference Fig.10 and Fig.11In some embodiments of the present invention, the backwash valve 600 includes a valve body 610, a position limiting portion 620, a plurality of ribs 630, a blind plate 640, a plurality of water holes 650 and an adjusting rod 660. The valve body 610 is movably arranged inside the valve sleeve 510 and is located above the first interface 140; the position limiting portion 620 is arranged in the middle of the valve body 610 and is spaced apart from the valve body 610; a plurality of ribs 630 are arranged between the valve body 610 and the position limiting portion 620, and a water gap is arranged between the plurality of ribs 630; the blind plate 640 is arranged at the bottom of the valve body 610, and in the first position, the blind plate 640 is blocked at the bottom of the valve sleeve 510; a plurality of water holes 650 are spaced apart on the side wall of the valve body 610; the first end of the adjusting rod 660 is connected to the position limiting portion 620, and the second end of the adjusting rod 660 is connected to the lower cover 330.

[0057] Specifically, the valve body 610 is a cylindrical structure, and the size of the valve body 610 is adapted to the size of the valve sleeve 510, so that the valve body 610 can slide inside the valve sleeve 510 and can also achieve the blocking of the valve body 610. The limiter 620 is fixedly arranged at the top of the valve body 610, and the inside of the limiter 620 is provided with an internal thread, and the bottom of the adjusting rod 660 is provided with an external thread, and the two are threadedly connected. In this way, the relative position of the valve body 610 inside the valve sleeve 510 can be adjusted so that the formation of the valve body 610 meets the requirements. When the filter element 200 is cleaned, the blind plate 640 blocks the valve sleeve 510. When filtering, the blind plate 640 is located below the valve sleeve 510, and the liquid can pass through the rib plate 630 and then flow out from the water hole 650. The advantage of such a setting is that the present invention ensures the flow rate during filtering while meeting the backwash filter element 200.

[0058] Reference Figure 3 In some embodiments of the present invention, the present invention further includes a backflush assembly 800, which is provided with a plurality of nozzles 830, which are connected in series through an air supply ring 820, the air supply ring 820 is connected with an air inlet pipe 810, and the air inlet pipe 810 is connected with an air blowing system; the plurality of nozzles 830 are used to form a vortex at the top of the barrier cylinder 710. Specifically, the circumferential angle between the nozzle 830 and the barrier cylinder 710 is 45 degrees, and the radial angle between the nozzle 830 and the barrier cylinder 710 is 30 degrees. With such a configuration, a vortex can be better formed, and the flushing force can be increased when the filter element 200 is cleaned.

[0059] Reference Fig.12 and Fig.13In some embodiments of the present invention, a raised portion 162 is provided in the middle of the cover body 161, a sealing ring 163 is provided inside the raised portion 162, and the cover body 161 also has a plurality of limiting holes 164 and fixing holes 165. A through hole is provided in the middle of the raised portion 162 to facilitate the passage of the adjustment rod 660, and the sealing ring 163 is used to increase the sealing between the adjustment rod 660 and the raised portion 162. The limiting hole 164 is for the penetration of the limiting rod 920, and the fixing hole 165 is a threaded hole for the penetration of the bolt, so as to fix it on the top of the filter housing 120.

[0060] Reference Fig.14 and Fig.15 The present invention also provides a filtering system, including a water inlet pipe 170, a drainage pipe 180 and a water production pipe 190, the water inlet pipe 170, the drainage pipe 180 and the water production pipe 190 are arranged in parallel with each other; a first water valve 171 is provided on the water inlet pipe 170; a second water valve 181 is provided on the drainage pipe 180; a third water valve 191 is provided on the water production pipe 190, a plurality of steel-making continuous casting machine pre-filters as in any one of the above embodiments, a plurality of steel-making continuous casting machine pre-filters are arranged in parallel, the steel-making continuous casting machine pre-filters are connected to the water inlet pipe 170 and the drainage pipe 180 through the second interface 150, and the steel-making continuous casting machine pre-filters are connected to the water production pipe 190 through the first interface 140.

[0061] When filtering is required, close the first water valve 171 and the third water valve 191, and close the first water valve 171. The water to be filtered enters the second interface 150 from the water inlet pipe 170, and then enters the third cavity 210. After filtration, the filtered water is discharged from the first interface 140 to the inside of the water-producing pipe 190 for collection. When the filter element 200 needs to be cleaned, the first water valve 171 can be closed and the second water valve 181 can be opened. At this time, clean water enters the first interface 140 from the water-producing pipe 190, and then cleans. After cleaning, the cleaning water is discharged from the drainage pipe 180. In the present invention, the purpose of setting up multiple steelmaking continuous casting machine pre-filters is that one or several can be cleaned separately in rotation, while the remaining steelmaking continuous casting machine pre-filters can continue to work. In this way, there will be no production stoppage, which greatly improves work efficiency.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pre-filter for a steelmaking continuous casting machine, characterized in that: include: A housing assembly (100) having a first cavity (110) and a second cavity (130) therein; the housing assembly (100) is provided with a first interface (140) and a second interface (150); the first interface (140) is in communication with the second cavity (130), and the second interface (150) is in communication with the first cavity (110); A filter element (200) having a third cavity (210) therein; the filter element (200) is arranged inside the first cavity (110); a plurality of filter slots (220) are arranged on the side wall of the filter element (200); one side of the third cavity (210) is in communication with the first interface (140) through the filter slots (220); and the other side of the third cavity (210) is in communication with the second interface (150); The filter element (200) is used to switch between an extended state and a compacted state; in the extended state, the contact area between the filter slot (220) and the first cavity (110) is a first area; in the compacted state, the contact area between the filter slot (220) and the first cavity (110) is a second area; and the first area is greater than the second area.

2. The pre-filter of the steelmaking continuous casting machine according to claim 1, characterized in that: The filter element (200) comprises a spiral structure, wherein the spiral structure has a plurality of coil layers connected end to end in sequence; In the stretched state, there is a gap between two adjacent ring layers, and in the compacted state, two adjacent ring layers are in contact with each other; At least part of the surface of the ring layer has a plurality of filter grooves (220).

3. The pre-filter of the steelmaking continuous casting machine according to claim 1, characterized in that: Also includes: A limiting component (900) is arranged inside the first cavity (110), the limiting component (900) has a limiting space inside, the filter element (200) is located in the limiting space, and an opening is provided at the bottom of the limiting component (900); A barrier seat (700) is disposed inside the first cavity (110) and connected to the bottom of the limiting assembly (900); the barrier seat (700) is used to fix the limiting assembly (900); and the second cavity (130) is located inside the barrier seat (700); a reset component (300) disposed in the limiting space, with one end of the reset component (300) abutting against the top end of the limiting component (900) and the other end abutting against the top end of the filter element (200), and the reset component (300) being used to maintain the filter element (200) in the compacted state; a valve seat (500) disposed at the opening, the valve seat (500) having a first flow channel and a second flow channel, the second flow channel being disposed outside the first flow channel, and both ends of the first flow channel and the second flow channel being respectively connected to the third cavity (210) and the second cavity (130); A backwash valve (600), wherein a first end of the backwash valve (600) is connected to the reset assembly (300), and a second end of the backwash valve (600) is arranged in the first flow channel, and the backwash valve (600) is used to switch between a first position and a second position; in the first position, the filter element (200) is in the extended state, and the second end of the backwash valve (600) blocks the first flow channel; in the second position, the filter element (200) is maintained in the compacted state, and the second end of the backwash valve (600) cancels the blockage of the first flow channel.

4. The pre-filter of the steelmaking continuous casting machine according to claim 3, characterized in that: The limiting assembly (900) comprises: A gland (910) is detachably disposed on the top of the housing assembly (100) and is used to seal the top of the housing assembly (100); A plurality of limiting rods (920) penetrate the pressure cover (910) and the top of the shell assembly (100); the plurality of limiting rods (920) are arranged at intervals in a closed shape; the middle of the plurality of limiting rods (920) constitutes the limiting space; and the bottoms of the plurality of limiting rods (920) are detachably connected to the barrier seat (700).

5. The pre-filter of the steel-making continuous casting machine according to claim 4, characterized in that: The barrier seat (700) comprises: A fixing ring (720), the bottom end of the limiting rod (920) being connected to the fixing ring (720); A barrier cylinder (710) is disposed at the bottom of the fixing ring (720); the bottom of the barrier cylinder (710) is sealedly connected to the bottom of the housing assembly (100); the interior of the barrier cylinder (710) forms the second cavity (130); A plurality of connecting members (730) are arranged at intervals on the outer circumference of the fixing ring (720), and a side of the connecting members (730) away from the fixing ring (720) is connected to the inner wall of the housing assembly (100).

6. The pre-filter of the steelmaking continuous casting machine according to claim 3, characterized in that: The reset component (300) comprises: An upper cover (310) is arranged on the top of the limiting assembly (900); An elastic member (320) movably disposed inside the upper cover (310); The lower cover (330) has one end abutting against the filter element (200) and the other end abutting against the elastic member (320), and the backwash valve (600) is connected to the lower cover (330).

7. The pre-filter of the steelmaking continuous casting machine according to claim 6, characterized in that: The valve seat (500) comprises: A valve sleeve (510), wherein the first flow channel is located inside the valve sleeve (510); A valve outer sleeve (520) is arranged on the outer periphery of the valve sleeve (510) and a gap is provided between the valve outer sleeve and the valve sleeve (510); A plurality of blades (530) are arranged in a spiral shape at intervals between the valve sleeve (510) and the valve outer sleeve (520), and the second flow channel is formed between two adjacent blades (530).

8. The pre-filter of the steel-making continuous casting machine according to claim 7, characterized in that: The backwash valve (600) comprises: A valve body (610) movably disposed inside the valve sleeve (510) and located above the first interface (140); A limiting portion (620) is disposed in the middle of the valve body (610) and is spaced apart from the valve body (610); A plurality of rib plates (630) are arranged between the valve body (610) and the limiting portion (620), and water-passing gaps are arranged between the plurality of rib plates (630); A blind plate (640) is provided at the bottom of the valve body (610); in the first position, the blind plate (640) blocks the bottom of the valve sleeve (510); A plurality of water holes (650) are arranged at intervals on the side wall of the valve body (610); An adjusting rod (660), wherein a first end of the adjusting rod (660) is connected to the limiting portion (620), and a second end of the adjusting rod (660) is connected to the lower cover (330).

9. The pre-filter of the steel-making continuous casting machine according to claim 5, characterized in that: It also includes a backflush assembly (800), the backflush assembly (800) being provided with a plurality of nozzles (830), the plurality of nozzles (830) being connected in series via an air supply ring (820), the air supply ring (820) being connected to an air intake pipe (810), and the air intake pipe (810) being connected to an air blowing system; the plurality of nozzles (830) being used to form a vortex at the top of the barrier cylinder (710).

10. A filtering system, characterized in that: include: The water inlet pipe (170) is provided with a first water valve (171); The drainage main pipeline (180) is provided with a second water valve (181); The water-producing jellyfish pipeline (190) is provided with a third water valve (191), and the water-inlet jellyfish pipeline (170), the water-discharging jellyfish pipeline (180) and the water-producing jellyfish pipeline (190) are arranged in parallel with each other; A plurality of pre-filters for a steel-making continuous casting machine as claimed in any one of claims 1 to 9, wherein the plurality of pre-filters for a steel-making continuous casting machine are arranged in parallel, wherein the pre-filters for a steel-making continuous casting machine are connected to the water inlet main pipe (170) and the water discharge main pipe (180) via a second interface (150), and wherein the pre-filters for a steel-making continuous casting machine are connected to the water production main pipe (190) via the first interface (140).

Images