Spray head for washing flat plate filter

Abstract

The present invention relates to the technical field of filter equipment, and provides a flat plate filter washing nozzle, which comprises: a spray pipe for introducing a washing liquid; the nozzle is movably arranged at the lower end of the spraying pipe, is provided with a plurality of spraying holes with different spraying directions, and is used for spraying a washing solution to wash the filtering medium so as to regenerate the filtering medium; wherein the nozzle can rotate around the axis of the spray pipe under the hydraulic push of the washing liquid, and is used for changing the drop point of the washing liquid sprayed by the spray hole so as to completely cover the filter medium. According to the invention, the nozzle rotates around the axis of the spray pipe, so that the drop points of a plurality of washing liquid flows sprayed from the plurality of spray holes can be changed, and the sprayed washing liquid generates centrifugal force; therefore, the washing liquid can be sprayed farther under the action of centrifugal force, the washing area can be enlarged, so that the washing liquid completely covers the filter medium, and the influence on regeneration of the filter medium is effectively eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of filter equipment, in particular to a nozzle for washing 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 devices use multiple groups of nozzles to wash and regenerate the filter medium. The nozzles of these nozzles have a single spray hole and the spray direction is fixed, so that the landing point of the washing liquid is always limited to a certain range and cannot fully cover the filter medium, which affects the regeneration of the filter medium. 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 nozzle for washing a flat disc filter to solve the problem that the nozzle of the existing nozzle has a single spray hole and a fixed spray direction, so that the landing point of the washing liquid is always limited to a certain range and cannot fully cover the filter medium, which affects the regeneration of the filter medium. In addition, the washing liquid is easily left inside the nozzle, which may cause the nozzle to be blocked if not handled in time.

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

[0006] A nozzle for washing a flat disc filter, comprising:

[0007] a spray pipe for introducing the cleaning liquid; and

[0008] A nozzle, movably disposed at the lower end of the nozzle pipe, having a plurality of spray holes with different spray directions, for spraying a washing liquid to wash the filter medium to regenerate it;

[0009] The nozzle can rotate around the axis of the nozzle under the hydraulic force of the cleaning liquid, so as to change the landing point of the cleaning liquid sprayed out of the spray hole to fully cover the filter medium.

[0010] Optionally, the nozzle comprises a convex ring, a cylindrical tube and a hemispherical head which are arranged in sequence;

[0011] The convex ring is rotatably connected to the inwardly concave step at the lower end of the nozzle in an embedded manner, and a plurality of guide plates evenly distributed around the circumference are connected to the side of the convex ring away from the cylindrical barrel, each of the guide plates extends into the interior of the nozzle and is provided with blades, and the blades extend along the radial direction of the nozzle and are inclined toward the lower end of the nozzle;

[0012] A plurality of spray holes are provided on the hemispherical sealing head.

[0013] Optionally, the plurality of spray holes are divided into three groups from bottom to top;

[0014] The first group of nozzle holes sprays along the axial direction of the nozzle;

[0015] The spray direction of the second group of spray holes forms an angle of 25° with the axial direction of the nozzle;

[0016] The spraying direction of the third group of spray holes forms an angle of 50° with the axial direction of the spray pipe.

[0017] Optionally, the spray holes are provided with 10 in total;

[0018] The number of the first group of nozzles is 1;

[0019] The second group of spray holes has three nozzles evenly distributed around the axial circumference of the spray pipe;

[0020] The third group of spray holes has six nozzles evenly distributed around the axial circumference of the spray pipe and are staggered with the second group of spray holes.

[0021] Optionally, the blades are arranged on the inner side of the guide plate;

[0022] One end of the guide plate away from the convex ring is in a wedge-shaped structure.

[0023] Optionally, the outer side surface of the guide plate is arc-shaped and extends axially along the nozzle to be close to the inner circumferential wall of the nozzle, so as to scrape the washing liquid remaining on the inner circumferential wall of the nozzle.

[0024] Optionally, one end of the guide plate away from the convex ring extends to the outside of the nozzle.

[0025] Optionally, three guide plates are evenly distributed around the circumference of the nozzle axis.

[0026] Optionally, a blocking cover is detachably connected to the lower end of the nozzle;

[0027] The blocking cover is provided with a blocking ring;

[0028] The upper side surface of the retaining ring is slidably matched with the side of the convex ring facing the cylindrical barrel;

[0029] The outer circumferential wall of the cylindrical barrel is slidably matched with the inner circumferential wall of the retaining ring.

[0030] Optionally, it further comprises a transmission gear fixedly sleeved outside the cylindrical barrel, wherein the transmission gear is in transmission connection with a motor and is used to assist the rotation of the nozzle by electric power;

[0031] The transmission gear comprises an inner ring and an outer gear ring which are arranged inside and outside and connected by a plurality of support blocks evenly distributed around the circumference;

[0032] The inner ring is fixedly sleeved outside the cylindrical tube by a plurality of screws evenly distributed around the circumference and threadedly connected thereto, the outer gear ring is meshed with a driving gear, and the driving gear is connected to the working end of the motor through a clutch.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. By rotating the nozzle around the axis of the nozzle, the landing points of multiple washing liquid flows sprayed through multiple spray holes will change, and the sprayed washing liquid will generate centrifugal force; in this way, the washing liquid will be sprayed farther under the action of centrifugal force, which can expand the washing area so that the washing liquid can fully cover the filter medium, effectively eliminating the impact on the regeneration of the filter medium.

[0035] 2. The guide plate with a wedge-shaped structure at the end can effectively reduce the resistance of the washing liquid flow and facilitate the washing liquid to be guided to the blades on the inner side of the guide plate.

[0036] 3. When the nozzle rotates around the axis of the nozzle, the rotating guide plate can scrape the inner wall of the nozzle circumference; at the same time, in conjunction with the blades, the cleaning liquid inside the nozzle can be stirred to reduce its residue in the nozzle; in addition, the hemispherical head is vertically downward, which is conducive to the outflow of the cleaning liquid from the spray hole and can also reduce the residual cleaning liquid, which can effectively solve the problem of nozzle blockage from the root.

[0037] 4. By using the retaining ring to press against the convex ring to block the axial movement of the nozzle, the stability of the nozzle during rotation can be improved, thereby ensuring the uniformity of the cleaning liquid when it is sprayed out; in addition, the retaining cover can be detachably connected to the lower end of the nozzle, which is more convenient for disassembly and assembly, and is conducive to cleaning and replacement of the inside of the nozzle.

[0038] 5. The transmission gear is driven by a motor, which can electrically assist the nozzle to rotate, thereby stabilizing its rotation speed so that the cleaning liquid can fully cover the filter medium after being sprayed out, and can also further ensure the uniformity of the cleaning liquid during spraying; in addition, the nozzle speed is stable, which can also drive the guide plate to continuously scrape the inner wall of the nozzle circumference and the blades to continuously stir the cleaning liquid inside the nozzle, thereby effectively reducing the residual cleaning liquid in the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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.

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0041] Figure 2 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0042] Figure 3 It is a schematic diagram of the top view of the structure of the present invention;

[0043] Figure 4 Schematic diagram of the three-dimensional structure of the nozzle;

[0044] Figure 5 Schematic diagram of the three-dimensional structure of the nozzle Figure 1 ;

[0045] Figure 6 Schematic diagram of the three-dimensional structure of the nozzle Figure 2 ;

[0046] Figure 7 It is a schematic diagram of the three-dimensional structure of the blocking cover;

[0047] Figure 8 It is a schematic diagram of the three-dimensional structure of the transmission gear. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0055] See also Figures 1 to 8 As shown, the present invention provides a nozzle for washing a flat disc filter, comprising:

[0056] A spray pipe 100 for introducing washing liquid; and

[0057] The nozzle 200 is movably disposed at the lower end of the nozzle 100 and has a plurality of spray holes 231 with different spray directions, and is used to spray washing liquid to wash the filter medium (such as filter cloth or filter screen) to regenerate it;

[0058] The nozzle 200 can rotate around the axis of the nozzle 100 under the hydraulic force of the cleaning liquid, so as to change the landing point of the cleaning liquid sprayed out of the spray hole 231 to fully cover the filter medium.

[0059] Specifically, the upper end of the nozzle 100 is connected to a washing liquid supply source (not shown in the figure). When working, the washing liquid from the washing liquid supply source enters the nozzle 200 through the nozzle 100; under the hydraulic driving action of the washing liquid, the nozzle 200 rotates around the axis of the nozzle 100, thereby changing the landing point of the washing liquid sprayed from the spray hole 231 and causing the sprayed washing liquid to generate centrifugal force; in this way, the washing liquid will be sprayed farther under the action of centrifugal force, thereby expanding the washing area so that the washing liquid fully covers the filter medium, effectively eliminating the impact on the regeneration of the filter medium.

[0060] See also Figure 5 and Figure 6 As shown, the nozzle 200 includes a convex ring 210, a cylindrical tube 220 and a hemispherical head 230 which are arranged in sequence; the convex ring 210 is rotatably connected to the inwardly recessed step at the lower end of the nozzle 100 in an embedded manner, and a plurality of circumferentially evenly distributed guide plates 240 are connected to the side of the convex ring 210 away from the cylindrical tube 220, each guide plate 240 extends into the interior of the nozzle 100 and is provided with a blade 241 thereon, and the blade 241 extends radially along the nozzle 100 and is inclined toward the lower end of the nozzle 100; a plurality of spray holes 231 are opened on the hemispherical head 230. The washing liquid flowing in the nozzle 100 impacts the blade 241 from the front under the action of the guide plate 240, causing the blade 241 to deflect, thereby rotating the convex ring 210, and further pushing the nozzle 200 to rotate around the axis of the nozzle 100, and the washing liquid flowing through the blade 241 enters the hemispherical head 230 and is sprayed out from the multiple spray holes 231; under the influence of the rotation of the nozzle 200 around the axis of the nozzle 100, the landing points of the multiple washing liquid flows sprayed through the multiple spray holes 231 will change, and the sprayed washing liquid will generate centrifugal force.

[0061] The plurality of spray holes 231 are divided into three groups from bottom to top. The first group of spray holes sprays along the axial direction (i.e., vertical direction) of the nozzle 100 , the second group of spray holes sprays in a 25° angle with the axial direction of the nozzle 100 , and the third group of spray holes sprays in a 50° angle with the axial direction of the nozzle 100 .

[0062] In this embodiment, there are 10 spray holes 231 in total, the first group of spray holes has 1 spray hole, the second group of spray holes has 3 spray holes evenly distributed around the axial circumference of the nozzle pipe 100, and the third group of spray holes has 6 spray holes evenly distributed around the axial circumference of the nozzle pipe 100 and are staggered with the second group of spray holes (specifically, two spray holes in the third group correspond to one spray hole in the second group).

[0063] In order to better guide the washing liquid to impact the blade 241, the blade 241 is arranged on the inner side of the guide plate 240; the end of the guide plate 240 away from the convex ring 210 is wedge-shaped. The guide plate 240 with a wedge-shaped end can effectively reduce the resistance of the washing liquid flow and facilitate the washing liquid to be directed to the blade 241 inside the guide plate 240.

[0064] The outer side of the guide plate 240 is arc-shaped, and it extends along the axial direction of the nozzle 100 to be close to the inner side wall of the nozzle 100, and is used to scrape the residual cleaning liquid on the inner side wall of the nozzle 100. When the nozzle 200 rotates around the axis of the nozzle 100, the rotating guide plate 240 can scrape the inner side wall of the nozzle 100; at the same time, in conjunction with the blades 241, the cleaning liquid inside the nozzle 100 can be stirred to reduce its residue in the nozzle 100; in addition, the hemispherical head 230 is vertically downward, which is conducive to the cleaning liquid flowing out of the spray hole 231, that is, it can also reduce the residual cleaning liquid, and can effectively solve the problem of nozzle blockage from the root.

[0065] In order to further reduce the residual washing liquid on the inner side wall of the nozzle 100, the end of the guide plate 240 away from the convex ring 210 extends to the outside of the nozzle 100 (that is, the upper end of the guide plate 240 is higher than the top surface of the nozzle 100). In this way, the guide plate 240 can scrape the inner side wall of the nozzle 100 in all directions.

[0066] In this embodiment, three guide plates 240 (blades 241 ) are evenly distributed around the circumference of the axis of the nozzle 100 .

[0067] In order to prevent the nozzle 200 from axially moving when rotating around the axis of the nozzle 100, the lower end of the nozzle 100 is detachably connected to a stopper 300 in an external threaded connection (see Figure 7 As shown in FIG. 1 , the stopper 300 is provided with a retaining ring 310, the upper side of the retaining ring 310 is slidably matched with the side of the convex ring 210 facing the cylindrical barrel 220, and the outer circumferential wall of the cylindrical barrel 220 is slidably matched with the inner circumferential wall of the retaining ring 310. The retaining ring 310 is pressed against the convex ring 210 to block the axial movement of the nozzle 200, which can improve the stability of the nozzle 200 during rotation, thereby ensuring the uniformity of the washing liquid when spraying; in addition, the stopper 300 can be detachably connected to the lower end of the nozzle 100, which is more convenient to disassemble and assemble, and is conducive to cleaning and replacement of the inside of the nozzle 200.

[0068] The above-mentioned flat plate filter washing nozzle also includes a transmission gear 400 fixedly mounted on the outside of the cylindrical barrel 220, and the transmission gear 400 is connected to a motor (not shown in the figure) for driving the nozzle 200 to rotate by electric power. Specifically, the transmission gear 400 includes an inner ring 410 and an outer gear ring 420 (see FIG. 1 for details) arranged inside and outside and connected by a plurality of circumferentially evenly distributed support blocks. Figure 8As shown); the inner ring 410 is fixedly sleeved on the outside of the cylindrical barrel 220 by a plurality of screws (not shown in the figure) uniformly distributed on the circumference and threadedly connected thereto, and the outer gear ring 420 is meshed with a driving gear (not shown in the figure), and the driving gear is connected to the working end of the motor through a clutch (not shown in the figure). When the pressure of the washing liquid is sufficient to drive the nozzle 200 to rotate with its hydraulic force or the speed of the nozzle 200 is not lower than a predetermined value (such as 30r / min), the motor does not work, the clutch loses power and separates, and the driving gear passively follows the transmission gear 400 to rotate; when the pressure of the washing liquid is insufficient to drive the nozzle 200 to rotate or the speed of the nozzle 200 is lower than a predetermined value (such as 30r / min), the motor is started, the clutch is electrically attracted, and an external force is actively applied through the driving gear to drive the transmission gear 400, which is now used as a driven gear, to rotate, and then the nozzle 200 is driven to rotate through the cylindrical barrel 220. That is to say, the transmission gear 400 is driven by a motor, which can electrically assist the nozzle 200 to rotate, thereby stabilizing its rotation speed so that the cleaning liquid can fully cover the filter medium after being sprayed out, and can also further ensure the uniformity of the cleaning liquid during spraying; in addition, the nozzle 200 has a stable rotation speed, which can also drive the guide plate 240 to continuously scrape the inner wall of the circumference of the nozzle 100 and the blade 241 to continuously stir the cleaning liquid inside the nozzle 100, thereby effectively reducing the residual cleaning liquid in the nozzle 100.

[0069] 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 nozzle for washing a flat disc filter, characterized in that: include: a spray pipe for introducing the cleaning liquid; and A nozzle, movably disposed at the lower end of the nozzle pipe, having a plurality of spray holes with different spray directions, for spraying a washing liquid to wash the filter medium to regenerate it; The nozzle can rotate around the axis of the nozzle under the hydraulic force of the cleaning liquid, so as to change the landing point of the cleaning liquid sprayed out of the spray hole to fully cover the filter medium.

2. The flat plate filter washing nozzle according to claim 1, characterized in that: The nozzle comprises a convex ring, a cylindrical tube and a hemispherical head arranged in sequence; The convex ring is rotatably connected to the inwardly concave step at the lower end of the nozzle in an embedded manner, and a plurality of guide plates evenly distributed around the circumference are connected to the side of the convex ring away from the cylindrical barrel, each of the guide plates extends into the interior of the nozzle and is provided with blades, and the blades extend along the radial direction of the nozzle and are inclined toward the lower end of the nozzle; A plurality of spray holes are provided on the hemispherical sealing head.

3. The flat plate filter washing nozzle according to claim 1 or 2, characterized in that: The plurality of spray holes are divided into three groups from bottom to top; The first group of nozzle holes sprays along the axial direction of the nozzle; The spray direction of the second group of spray holes forms an angle of 25° with the axial direction of the nozzle; The spraying direction of the third group of spray holes forms an angle of 50° with the axial direction of the spray pipe.

4. The flat plate filter washing nozzle according to claim 3, characterized in that: There are 10 spray holes in total; The number of the first group of nozzles is 1; The second group of spray holes has three nozzles evenly distributed around the axial circumference of the spray pipe; The third group of spray holes has six nozzles evenly distributed around the axial circumference of the spray pipe and are staggered with the second group of spray holes.

5. The flat plate filter washing nozzle according to claim 2 or 4, characterized in that: The blades are arranged on the inner side of the guide plate; One end of the guide plate away from the convex ring is in a wedge-shaped structure.

6. The flat plate filter washing nozzle according to claim 5, characterized in that: The outer side surface of the guide plate is arc-shaped and extends 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.

7. The flat plate filter washing nozzle according to claim 5, characterized in that: One end of the guide plate away from the convex ring extends to the outside of the nozzle.

8. The flat plate filter washing nozzle according to claim 6 or 7, characterized in that: The guide plates are evenly distributed in three pieces around the circumference of the nozzle axis.

9. The flat plate filter washing nozzle 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 the side of the convex ring facing the cylindrical barrel; The outer circumferential wall of the cylindrical barrel is slidably matched with the inner circumferential wall of the retaining ring.

10. The flat plate filter washing nozzle according to claim 2 or 9, characterized in that: It also includes a transmission gear fixedly sleeved outside the cylindrical barrel, the transmission gear is in transmission connection with a motor, and is used to assist the rotation of the nozzle through electricity; The transmission gear comprises an inner ring and an outer gear ring which are arranged inside and outside and connected by a plurality of support blocks evenly distributed around the circumference; The inner ring is fixedly sleeved outside the cylindrical tube by a plurality of screws evenly distributed around the circumference and threadedly connected thereto, the outer gear ring is meshed with a driving gear, and the driving gear is connected to the working end of the motor through a clutch.

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