Washing device of flat plate filter

Abstract

The invention relates to the technical field of filters, and provides a washing device of a flat-plate filter, which is arranged in a washing area of the flat-plate filter, is used for washing a filter medium to regenerate the filter medium, and comprises a support plate on which a plurality of equidistantly arranged shunt pipes are arranged in a penetrating manner; the first sprayers are in threaded connection with the lower ends of part of the flow dividing pipes and are provided with first nozzles; the second spray heads are in threaded connection with the lower ends of the other part of the shunt pipes, are arranged at intervals with the first spray heads and are provided with second nozzles; wherein the first nozzle and the second nozzle are in transmission connection, and the first nozzle and the second nozzle can rotate forwards and reversely around the axis of the flow dividing pipe under hydraulic pushing of the washing liquid and are used for changing the spraying angle of the washing liquid so as to move the washing point position and enlarge the washing area. The first nozzle and the second nozzle which are in transmission connection are driven to rotate through the fluid power of the washing liquid, the spraying angle of the washing liquid can be changed, the sprayed washing liquid can generate centrifugal force, and therefore the washing point position is effectively moved, and the washing area is effectively enlarged.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and in particular to a washing device for a flat disc filter. Background Art

[0002] The flat plate filter is a vacuum solid-liquid separation equipment commonly used in hydrometallurgical production. It mainly uses filter cloth or filter screen as the filter medium, and arranges the slurry in a fan shape on the filter medium, making full use of the slurry gravity and vacuum suction. During the rotation process, the slurry passes through the back-blowing area, cloth area, washing area, and spiral unloading area in sequence through the flat plate surface to achieve the purpose of solid-liquid separation. The performance of the washing device installed in the washing area is crucial to the uniformity of washing and the technical indicators of the filtered product.

[0003] At present, the existing washing device uses multiple groups of nozzles to wash and regenerate the filter medium. The angles at which these nozzles spray washing liquid remain unchanged, resulting in the washing method having disadvantages such as fixed washing points and small washing area, which affects the working efficiency of the flat disc filter. In addition, washing liquid is easily left inside the nozzle. If not handled in time, it may cause nozzle clogging. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a washing device for a flat disc filter to solve the problems of the existing washing devices having fixed washing points, small washing area, etc., which affect the work efficiency, and washing liquid easily remaining inside the nozzle and causing blockage.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A washing device for a flat disc filter is provided in a washing area of ​​the flat disc filter and is used for washing a filter medium to regenerate the filter medium. The washing device comprises:

[0007] A support plate, through which a plurality of equally spaced flow divider pipes are provided;

[0008] A plurality of first spray heads, threadedly connected to the lower end of a portion of the diverter pipes, and having a first nozzle for spraying washing liquid; and

[0009] A plurality of second spray heads, threadedly connected to the lower end of the diverter pipe of another part and arranged spaced apart from the first spray heads, and having second nozzles for spraying washing liquid;

[0010] The first nozzle is connected to the second nozzle in a transmission manner, and they can rotate forward and reverse around the axis of the diversion pipe respectively under the hydraulic force of the washing liquid, so as to change the spray angle of the washing liquid to move the washing point and expand the washing area.

[0011] Optionally, the first nozzle and the second nozzle both include a nozzle threadedly connected to the lower end of the diverter pipe;

[0012] The first nozzle comprises a first convex ring, a first cylindrical tube and a first hemispherical head which are arranged in sequence;

[0013] The first convex ring is rotatably connected to the inwardly concave step at the lower end of the corresponding nozzle in an embedded manner, and a plurality of first guide plates evenly distributed around the circumference are connected to the side of the first convex ring away from the first cylindrical tube, each of the first guide plates extends into the interior of the nozzle and is connected to a first blade, and the first blade extends radially along the nozzle and is inclined toward the lower end of the nozzle;

[0014] The first hemispherical end cap is provided with a plurality of first spray holes, and the spray directions of the plurality of first spray holes are different;

[0015] The second nozzle comprises a second convex ring, a second cylindrical tube and a second hemispherical head which are arranged in sequence;

[0016] The second convex ring is rotatably connected to the inwardly concave step at the lower end of the corresponding nozzle in an embedded manner, and a plurality of second guide plates evenly distributed around the circumference are connected to the side of the second convex ring away from the second cylindrical tube, each of the second guide plates extends into the interior of the nozzle and is connected to a second blade with a twisting direction opposite to that of the first blade, and the second blade extends radially along the nozzle and is inclined toward the lower end of the nozzle;

[0017] The second hemispherical end cover is provided with a plurality of second spray holes, and the spray directions of the plurality of second spray holes are different.

[0018] Optionally, the first blade is connected to the inner side of the first guide plate, and the second blade is connected to the inner side of the second guide plate;

[0019] One end of the first guide plate and the second guide plate away from the first convex ring and the second convex ring is a wedge-shaped structure.

[0020] Optionally, the outer side surfaces of the first guide plate and the second guide plate are both arc-shaped, and extend axially along the nozzle to be close to the inner circumferential wall of the nozzle, so as to scrape the residual washing liquid on the inner circumferential wall of the nozzle.

[0021] Optionally, the first nozzle and the second nozzle are connected via a gear transmission pair consisting of a first gear and a second gear;

[0022] The first gear has the same structure as the second gear, and comprises an inner ring and an outer gear ring which are arranged inside and outside and connected by a plurality of circumferentially evenly distributed support blocks;

[0023] The inner ring of the first gear is fixedly sleeved outside the first cylindrical tube by a plurality of first screws evenly distributed around the circumference and threadedly connected thereto, and the inner ring of the second gear is fixedly sleeved outside the second cylindrical tube by a plurality of second screws evenly distributed around the circumference and threadedly connected thereto, and the outer gear ring of the first gear is meshed with the outer gear ring of the second gear.

[0024] Optionally, a blocking cover is detachably connected to the lower end of the nozzle;

[0025] The blocking cover is provided with a blocking ring;

[0026] The upper side surface of the retaining ring is slidably matched with a side of the first convex ring facing the first cylindrical barrel and a side of the second convex ring facing the second cylindrical barrel respectively;

[0027] The circumferential outer side walls of the first cylindrical tube and the second cylindrical tube are respectively slidably matched with the circumferential inner side wall of the retaining ring.

[0028] Optionally, a waterproof servo motor is also included;

[0029] The waterproof servo motor is hoisted below the support plate and is transmission-connected with the first nozzle or the second nozzle adjacent to the support plate.

[0030] Optionally, the working end of the waterproof servo motor is connected to a driving gear via a clutch;

[0031] The driving gear is meshed with the adjacent first gear or second gear.

[0032] Optionally, a speed sensor electrically connected to the clutch is mounted on the waterproof servo motor to monitor the speed of the driving gear.

[0033] Optionally, the transmission ratio between the driving gear and the first gear or the second gear is greater than 1.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The first nozzle and the second nozzle connected to each other are driven to rotate by the hydraulic force of the washing liquid, which can change the spray angle of the washing liquid and make the sprayed washing liquid generate centrifugal force, thereby effectively moving the washing point and expanding the washing area.

[0036] 2. Through the forward and reverse rotation of the first nozzle and the second nozzle around the axis of the diverter pipe (or nozzle), the multiple washing liquid flows sprayed through the multiple first spray holes and the multiple washing liquid flows sprayed through the multiple second spray holes intersect, complementing each other, and can further expand the washing area so that the washing liquid fully covers the filter medium.

[0037] 3. The first guide plate and the second guide plate with wedge-shaped ends can effectively reduce the resistance to the flow of the washing liquid and facilitate the washing liquid to be directed to the first blade and the second blade inside the first guide plate and the second guide plate.

[0038] 4. When the first nozzle and the second nozzle rotate forward and reversely around the axis of the diverter pipe (or nozzle) respectively, the rotating first guide plate and the second guide plate can scrape the inner wall of the nozzle circumference; at the same time, in conjunction with the first blade and the second blade, the washing liquid inside the nozzle can be stirred to reduce its residue in the nozzle; in addition, the first hemispherical head and the second hemispherical head are vertically downward, which is conducive to the washing liquid flowing out from their respective corresponding spray holes, that is, it can also reduce the washing liquid residue, and can effectively solve the problem of blockage of the first nozzle and the second nozzle from the root.

[0039] 5. Through the mutual meshing transmission between the outer gear ring of the first gear and the outer gear ring of the second gear, the rotation of the first nozzle can drive the rotation of the second nozzle, and vice versa, the rotation of the second nozzle can also drive the rotation of the first nozzle, thereby increasing the speed to increase the centrifugal force generated when the washing liquid is sprayed from the corresponding spray hole.

[0040] 6. The retaining ring is pressed against the first convex ring and the second convex ring to block the axial movement of the first nozzle and the second nozzle, which can improve the stability of the first nozzle and the second nozzle during rotation, thereby ensuring the uniformity of the washing liquid when spraying; in addition, the retaining cover is detachably connected to the lower end of the nozzle, which is more convenient for disassembly and assembly, and is beneficial to the cleaning and replacement of the inside of the first nozzle and the second nozzle.

[0041] 7. The waterproof servo motor, clutch and driving gear can be provided to electrically assist the rotation of the first nozzle and the second nozzle, thereby stabilizing their rotation speeds so that the washing liquid can fully cover the filter medium after being sprayed out, and can also further ensure the uniformity of the washing liquid during spraying; in addition, the first nozzle and the second nozzle have stable rotation speeds, which can also drive the first guide plate and the second guide plate to continuously scrape the inner wall of the nozzle circumference and the first blade and the second blade to continuously stir the washing liquid inside the nozzle, thereby effectively reducing the residual washing liquid in the nozzle.

[0042] 8. The electric-assisted rotation of the first nozzle and the second nozzle is a deceleration motion, which can limit the rotation speed of the first nozzle and the second nozzle from being too high, and can avoid the washing liquid from being scattered and wasted. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0045] Figure 2 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0046] Figure 3 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0047] Figure 4 is a schematic diagram of the three-dimensional structure of the first nozzle;

[0048] Figure 5 is a schematic diagram of the main cross-sectional structure of the first nozzle;

[0049] Figure 6 is a schematic diagram of the top view of the structure of the first nozzle;

[0050] Figure 7 is a schematic diagram of the three-dimensional structure of the first nozzle;

[0051] Figure 8 is a schematic diagram of the three-dimensional structure of the second nozzle;

[0052] Fig. 9 is a schematic diagram of the main cross-sectional structure of the second nozzle;

[0053] Fig.10 is a schematic diagram of the top view of the structure of the second nozzle;

[0054] Fig.11 is a schematic diagram of the three-dimensional structure of the second nozzle;

[0055] Fig.12 Schematic diagram of the three-dimensional structure of the nozzle;

[0056] Fig.13 It is a schematic diagram of the three-dimensional structure of the blocking cover;

[0057] Fig.14 is a schematic diagram of the three-dimensional structure of the first gear / the second gear;

[0058] Fig.15 It is a schematic diagram of the three-dimensional structure of the driving gear. DETAILED DESCRIPTION

[0059] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0064] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention.

[0065] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0066] See also Figure 1 to Figure 15 As shown, the present invention provides a washing device for a flat plate filter, which is arranged in a washing area (not shown) of the flat plate filter and is used to wash a filter medium (such as a filter cloth or a filter screen) to regenerate it. The washing device comprises:

[0067] A support plate 100 having a plurality of equally spaced flow dividers 110 extending therethrough;

[0068] A plurality of first spray heads 200, threadedly connected to a lower end of a portion of the shunt pipe 110, having a first nozzle 210 for spraying a cleaning liquid; and

[0069] A plurality of second spray heads 300, which are threadedly connected to the lower end of another portion of the shunt pipe 110 and are spaced apart from the first spray heads 200, and have second nozzles 310 for spraying washing liquid;

[0070] The first nozzle 210 and the second nozzle 310 are connected in a transmission manner, and they can rotate forward and reverse around the axis of the diversion pipe 110 respectively under the hydraulic force of the washing liquid, so as to change the spray angle of the washing liquid to move the washing point and expand the washing area.

[0071] Specifically, the upper ends of the plurality of branch pipes 110 are connected to a main pipe with a booster pump (not shown in the figure), and the main pipe is connected to a source of washing liquid (not shown in the figure). During operation, the washing liquid from the source of washing liquid flows to each branch pipe 110 after being pressurized by the booster pump on the main pipe, and then enters the first nozzle 200 and the second nozzle 300; under the hydraulic driving force of the washing liquid, the first nozzle 210 rotates around the axis of the branch pipe 110 in the positive direction (counterclockwise from the upper end of the branch pipe 110 to the lower end), and the second nozzle 310 rotates around the axis of the branch pipe 110 in the reverse direction (clockwise from the upper end of the branch pipe 110 to the lower end), thereby changing the spray angle of the washing liquid and making it The sprayed washing liquid generates centrifugal force; through the transmission connection between the first nozzle 210 and the second nozzle 310, the rotation of the first nozzle 210 can drive the second nozzle 310 to rotate to accelerate its rotation speed, and vice versa, the rotation of the second nozzle 310 can also drive the first nozzle 210 to rotate to accelerate its rotation speed. They transmit to each other and can increase the centrifugal force generated by the washing liquid; in this way, the washing liquid will be sprayed farther under the action of centrifugal force, thereby moving the washing point of the filter medium and expanding the washing area of ​​the filter medium.

[0072] See also Figures 4 to 12 As shown, the first nozzle 200 and the second nozzle 300 both include a nozzle 220 threadedly connected to the lower end of the diverter pipe 110; the first nozzle 210 includes a first convex ring 211, a first cylindrical barrel 212 and a first hemispherical head 213 arranged in sequence; the first convex ring 211 is rotatably connected to the inwardly recessed step at the lower end of the corresponding nozzle 220 in an embedded manner, and a plurality of first guide plates 214 uniformly distributed around the circumference are connected to the side of the first convex ring 211 away from the first cylindrical barrel 212, each first guide plate 214 extends into the interior of the nozzle 220 and is connected to a first blade 215, which extends radially along the nozzle 220 and is inclined toward the lower end of the nozzle 220; a plurality of first spray holes 216 are opened on the first hemispherical head 213, and the plurality of first spray holes 216 are arranged on the first hemispherical head 213. 216 have different spraying directions; the second nozzle 310 includes a second convex ring 311, a second cylindrical tube 312 and a second hemispherical head 313 which are arranged in sequence; the second convex ring 311 is rotatably connected to the inwardly recessed step at the lower end of the corresponding nozzle 220 in an embedded manner, and a plurality of second guide plates 314 are connected to the side of the second convex ring 311 away from the second cylindrical tube 312, each second guide plate 314 extends into the interior of the nozzle 220 and is connected to a second blade 315 having a twisting direction opposite to that of the first blade 215, and the second blade 315 extends radially along the nozzle 220 and is inclined toward the lower end of the nozzle 220; the second hemispherical head 313 is provided with a plurality of second spray holes 316, and the spraying directions of the plurality of second spray holes 316 are different. The pressurized washing liquid flows into the nozzle 220 through the diverter pipe 110, and impacts the first blade 215 and the second blade 315 from the front under the action of the first guide plate 214 and the second guide plate 314, respectively, so that the first blade 215 and the second blade 315 are deflected, thereby rotating the first convex ring 211 and the second convex ring 311, and then driving the first nozzle 210 and the second nozzle 310 to rotate forward and reverse around the axis of the diverter pipe 110 (or the nozzle 220), and the washing liquid flowing through the first blade 215 and the second blade 315 The washing liquid enters the first hemispherical head 213 and the second hemispherical head 313 respectively and is sprayed out from the multiple first spray holes 216 and the multiple second spray holes 316; under the influence of the first nozzle 210 and the second nozzle 310 rotating forward and reversely around the axis of the diverter pipe 110 (or the nozzle 220), the multiple washing liquid flows sprayed through the multiple first spray holes 216 and the multiple washing liquid flows sprayed through the multiple second spray holes 316 intersect with each other to complement each other, which can further expand the washing area so that the washing liquid fully covers the filter medium.

[0073] In order to better guide the washing liquid to impact the first blade 215 and the second blade 315, the first blade 215 is connected to the inner side of the first guide plate 214, and the second blade 315 is connected to the inner side of the second guide plate 314; the first guide plate 214 and the second guide plate 314 are respectively wedge-shaped at one end away from the first convex ring 211 and the second convex ring 311. The first guide plate 214 and the second guide plate 314 with wedge-shaped ends can effectively reduce the resistance of the washing liquid flow and facilitate the washing liquid to be directed to the first blade 215 and the second blade 315 inside the first guide plate 214 and the second guide plate 314.

[0074] The outer side surfaces of the first guide plate 214 and the second guide plate 314 are both arc-shaped, and they extend along the axial direction of the nozzle 220 to be close to the inner side wall of the nozzle 220, and are used to scrape the residual washing liquid on the inner side wall of the nozzle 220. When the first nozzle 210 and the second nozzle 310 rotate forward and reverse respectively around the axis of the diverter pipe 110 (or the nozzle 220), the rotating first guide plate 214 and the second guide plate 314 can scrape the inner side wall of the nozzle 220; at the same time, in conjunction with the first blade 215 and the second blade 315, the washing liquid inside the nozzle 220 can be stirred to reduce its residue in the nozzle 220; in addition, the first hemispherical head 213 and the second hemispherical head 313 are vertically downward, which is conducive to the washing liquid flowing out from the corresponding spray holes, that is, it can also reduce the residual washing liquid, and can effectively solve the problem of clogging of the first nozzle 200 and the second nozzle 300 from the root.

[0075] The first nozzle 210 and the second nozzle 310 are connected by a gear transmission pair consisting of a first gear 230 and a second gear 320. Specifically, the first gear 230 and the second gear 320 have the same structure, and include an inner ring 231 and an outer ring gear 232 that are arranged inside and outside and connected by a plurality of circumferentially evenly distributed support blocks (see Fig.14 The inner ring 231 of the first gear 230 is fixedly sleeved on the outside of the first cylindrical barrel 212 by a plurality of first screws (not shown in the figure) evenly distributed and threadedly connected thereto, and the inner ring 231 of the second gear 320 is fixedly sleeved on the outside of the second cylindrical barrel 312 by a plurality of second screws (not shown in the figure) evenly distributed and threadedly connected thereto, and the outer ring gear 232 of the first gear 230 is meshed with the outer ring gear 232 of the second gear 320. Through the mutual meshing transmission between the outer ring gear of the first gear 230 and the outer ring gear of the second gear 320, the rotation of the first nozzle 210 can drive the rotation of the second nozzle 310, and vice versa, the rotation of the second nozzle 310 can also drive the rotation of the first nozzle 210, thereby achieving a speed increase to increase the centrifugal force generated when the washing liquid is sprayed from the corresponding spray hole.

[0076] In order to prevent the first nozzle 210 and the second nozzle 310 from axially moving when they rotate forward and reverse respectively around the axis of the diverter pipe 110 (or the nozzle 220), the lower end of the nozzle 220 is detachably connected to a stopper 240 (see Fig.13 As shown in the figure, the blocking cover 240 is provided with a retaining ring 241, and the upper side surface of the retaining ring 241 is respectively slidably matched with the side of the first convex ring 211 facing the first cylindrical barrel 212 and the side of the second convex ring 311 facing the second cylindrical barrel 312, and the outer circumferential walls of the first cylindrical barrel 212 and the second cylindrical barrel 312 are respectively slidably matched with the inner circumferential wall of the retaining ring 241. The retaining ring 241 is pressed against the first convex ring 211 and the second convex ring 311 to block the axial movement of the first nozzle 210 and the second nozzle 310, so as to improve the stability of the first nozzle 210 and the second nozzle 310 during the rotation process, thereby ensuring the uniformity of the washing liquid when spraying; in addition, the blocking cover 240 is detachably connected to the lower end of the nozzle 220, which is more convenient to disassemble and assemble, and is conducive to the cleaning and replacement of the inside of the first nozzle 210 and the second nozzle 310.

[0077] See also Figure 1 to Figure 3 As shown, the washing device of the above-mentioned flat plate filter also includes a waterproof servo motor 400, which is hoisted below the support plate 100 and is transmission-connected to the first nozzle 210 or the second nozzle 310 adjacent thereto. Specifically, the working end of the waterproof servo motor 400 is connected to a driving gear 420 (see Fig.15As shown, its structure is similar to the first gear 230 or the second gear 320), and the driving gear 420 is meshed with the first gear 230 or the second gear 320 adjacent thereto. When the pressure of the washing liquid is sufficient to drive the first nozzle 210 and the second nozzle 310 to rotate with its liquid force or the rotation speed of the first nozzle 210 and the second nozzle 310 is not lower than a predetermined value (for example, 30 r / min), the waterproof servo motor 400 does not work, the clutch 410 loses power and separates, and the driving gear 420 passively follows the first gear 230 or the second gear 320 to rotate; when the pressure of the washing liquid is insufficient to drive the first nozzle 210 and the second nozzle 310 to rotate or the rotation speed of the first nozzle 210 and the second nozzle 310 is lower than a predetermined value (for example, 30 r / min), the waterproof servo motor 400 is started, the clutch 410 is electrically attracted, and an external force is actively applied through the driving gear 420 to rotate the first gear 230 or the second gear 320 used as a driven gear at this time, and then the first gear 230 and the second gear 320 are driven to rotate through the meshing transmission between the first gear 230 and the second gear 320. That is to say, by means of the waterproof servo motor 400, the clutch 410 and the driving gear 420, the first nozzle 210 and the second nozzle 310 can be electrically assisted to rotate, thereby stabilizing their rotation speeds so that the washing liquid can fully cover the filter medium after being sprayed out, and at the same time, the uniformity of the washing liquid during spraying can be further ensured; in addition, the first nozzle 210 and the second nozzle 310 have a stable rotation speed, which can also drive the first guide plate 214 and the second guide plate 314 to continuously scrape the inner side wall of the circumference of the nozzle 220 and the first blade 215 and the second blade 315 to continuously stir the washing liquid inside the nozzle 220, thereby effectively reducing the residual washing liquid in the nozzle 220.

[0078] In order to accurately control the start and stop of the waterproof servo motor 400 according to the rotation speed of the first nozzle 210 and the second nozzle 310, a rotation speed sensor (not shown in the figure) electrically connected to the clutch 410 is installed on the waterproof servo motor 400 to monitor the rotation speed of the driving gear 420. When the rotation speed of the first nozzle 210 and the second nozzle 310 is calculated to be lower than the above-mentioned predetermined value by measuring the rotation speed of the driving gear 420, the waterproof servo motor 400 is started, the clutch 410 is electrically attracted, and the driving gear 420 is driven to rotate with the first gear 230 or the second gear 320, thereby realizing automatic control.

[0079] The transmission ratio between the driving gear 420 and the first gear 230 or the second gear 320 is greater than 1. Specifically, the number of teeth of the driving gear 420 is 13, and the number of teeth of the first gear 230 and the second gear 320 are both 25. In this way, the movement of the first nozzle 210 and the second nozzle 310 rotating with the assistance of electricity is a deceleration movement, which can limit the rotation speed of the first nozzle 210 and the second nozzle 310 from being too high, and can prevent the washing liquid from being scattered and wasted.

[0080] In this embodiment, six shunt pipes 110 are arranged at equal intervals and in a row, and three first nozzles 200 and three second nozzles 300 are provided respectively; the second nozzle 300 (second nozzle 310) is close to the waterproof servo motor 400, that is, the driving gear 420 and the second gear 320 are meshed with each other.

[0081] The above embodiments are only preferred embodiments of the present invention and are not limitations of the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. A washing device for a flat disc filter, arranged in a washing area of ​​the flat disc filter, for washing the filter medium to regenerate it, characterized in that: The washing device comprises: A support plate, through which a plurality of equally spaced flow divider pipes are provided; A plurality of first spray heads, threadedly connected to the lower end of a portion of the diverter pipes, and having a first nozzle for spraying washing liquid; and A plurality of second spray heads, threadedly connected to the lower end of the diverter pipe of another part and arranged spaced apart from the first spray heads, and having second nozzles for spraying washing liquid; The first nozzle is connected to the second nozzle in a transmission manner, and they can rotate forward and reverse around the axis of the diversion pipe respectively under the hydraulic force of the washing liquid, so as to change the spray angle of the washing liquid to move the washing point and expand the washing area.

2. The washing device for the flat disc filter according to claim 1, characterized in that: The first nozzle and the second nozzle both include a nozzle threadedly connected to the lower end of the diverter pipe; The first nozzle comprises a first convex ring, a first cylindrical tube and a first hemispherical head which are arranged in sequence; The first convex ring is rotatably connected to the inwardly concave step at the lower end of the corresponding nozzle in an embedded manner, and a plurality of first guide plates evenly distributed around the circumference are connected to the side of the first convex ring away from the first cylindrical tube, each of the first guide plates extends into the interior of the nozzle and is connected to a first blade, and the first blade extends radially along the nozzle and is inclined toward the lower end of the nozzle; The first hemispherical end cap is provided with a plurality of first spray holes, and the spray directions of the plurality of first spray holes are different; The second nozzle comprises a second convex ring, a second cylindrical tube and a second hemispherical head which are arranged in sequence; The second convex ring is rotatably connected to the inwardly concave step at the lower end of the corresponding nozzle in an embedded manner, and a plurality of second guide plates evenly distributed around the circumference are connected to the side of the second convex ring away from the second cylindrical tube, each of the second guide plates extends into the interior of the nozzle and is connected to a second blade with a twisting direction opposite to that of the first blade, and the second blade extends radially along the nozzle and is inclined toward the lower end of the nozzle; The second hemispherical end cover is provided with a plurality of second spray holes, and the spray directions of the plurality of second spray holes are different.

3. The washing device for the flat disc filter according to claim 2, characterized in that: The first blade is connected to the inner side of the first guide plate, and the second blade is connected to the inner side of the second guide plate; One end of the first guide plate and the second guide plate away from the first convex ring and the second convex ring is a wedge-shaped structure.

4. The washing device for the flat disc filter according to claim 3, characterized in that: The outer side surfaces of the first guide plate and the second guide plate are both arc-shaped and extend along the axial direction of the nozzle to be close to the inner circumferential wall of the nozzle, so as to scrape the residual washing liquid on the inner circumferential wall of the nozzle.

5. The washing device for a flat disc filter according to any one of claims 2 to 4, characterized in that: The first nozzle and the second nozzle are connected via a gear transmission pair consisting of a first gear and a second gear; The first gear has the same structure as the second gear, and comprises an inner ring and an outer gear ring which are arranged inside and outside and connected by a plurality of circumferentially evenly distributed support blocks; The inner ring of the first gear is fixedly sleeved outside the first cylindrical tube by a plurality of first screws evenly distributed around the circumference and threadedly connected thereto, and the inner ring of the second gear is fixedly sleeved outside the second cylindrical tube by a plurality of second screws evenly distributed around the circumference and threadedly connected thereto, and the outer gear ring of the first gear is meshed with the outer gear ring of the second gear.

6. The washing device for the flat disc filter according to claim 2, characterized in that: The lower end of the nozzle is detachably connected with a blocking cover; The blocking cover is provided with a blocking ring; The upper side surface of the retaining ring is slidably matched with a side of the first convex ring facing the first cylindrical barrel and a side of the second convex ring facing the second cylindrical barrel respectively; The circumferential outer side walls of the first cylindrical tube and the second cylindrical tube are respectively slidably matched with the circumferential inner side wall of the retaining ring.

7. The washing device for the flat disc filter according to claim 5, characterized in that: Also included is a waterproof servo motor; The waterproof servo motor is hoisted below the support plate and is transmission-connected with the first nozzle or the second nozzle adjacent to the support plate.

8. The washing device for the flat disc filter according to claim 7, characterized in that: The working end of the waterproof servo motor is connected to a driving gear via a clutch; The driving gear is meshed with the adjacent first gear or second gear.

9. The washing device for a flat disc filter according to claim 8, characterized in that: The waterproof servo motor is provided with a rotation speed sensor electrically connected to the clutch for monitoring the rotation speed of the driving gear.

10. The washing device for a flat disc filter according to claim 8 or 9, characterized in that: The transmission ratio between the driving gear and the first gear or the second gear is greater than 1.

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