Flow stabilizer with reverse structure

Abstract

The flow stabilizing device comprises a feeding pipe, a vertical discharging pipe, a reverse feeding barrel and a guide plate, the upper end and the lower end of the discharging pipe are each of an opening structure, and the barrel wall of the reverse feeding barrel is arranged on the outer side of the discharging pipe; the lower end of the barrel wall is connected with the pipe wall of the discharging pipe in a watertight mode through the barrel bottom, the upper end of the barrel wall is higher than the upper end of the discharging pipe, and a feeding port communicated with the feeding pipe is formed in the lower portion of the barrel wall. And the guide plate is wound between the pipe wall of the blanking pipe and the barrel wall of the reverse feeding barrel in a spiral ascending manner. The flow stabilizing device provided by the utility model can effectively stabilize the flow of the ore pulp before the ore pulp enters the concentration tank of the concentration system, so that the ore pulp can be sufficiently flocculated, and the concentration effect is remarkably improved.

Description

Technical Field

[0001] The present application belongs to the technical field of concentrators, and specifically provides a flow stabilizing device with a reverse structure. Background Art

[0002] A concentrator is a solid-liquid separation equipment that can work continuously. It is mainly used for clarification of slurry in the field of wet mineral processing. When the concentrator is working, the slurry enters the concentrator through a central steady flow barrel or a similar steady flow feeding device, and concentrated sedimentation is achieved inside the concentrator.

[0003] There are many known steady flow feeding devices, most of which change the flow direction of the slurry by adjusting the structure. This structural design directly converts the kinetic energy through the mechanical structure. During the conversion process, a strong shear force will be generated, which will easily break up the flocculation particles for the second time and reduce the flocculation effect. At the same time, if the sedimentation layer of the concentrator cannot be fully precipitated, its sewage will impact the sedimentation layer from the central feed barrel, affecting the sedimentation effect of the slurry particles in the lower part of the concentrator.

[0004] Chinese patent CN103301659A provides a concentrator stabilizing device, which drives the slurry to rise by means of spiral blades arranged in the middle cylinder, and achieves mineralization by falling and colliding with the rising slurry during the rising process, thereby enhancing the flocculation effect. However, the above structure will cause mutual interference between the rising and descending fluids in the same space, and the turbulence generated will inevitably affect the flocculation effect of the flocculant. Utility Model Content

[0005] The purpose of the present application is to solve the problems existing in the above-mentioned prior art and provide a flow stabilizing device with a reverse structure, the flow stabilizing device comprising a feed pipe and a vertical feed pipe, the upper end and the lower end of the feed pipe are both open structures;

[0006] The reverse-type flow stabilizing device also includes a reverse feeding barrel and a guide plate;

[0007] The barrel wall of the reverse feeding barrel is arranged on the outer side of the feeding tube, the lower end of the barrel wall is watertightly connected to the tube wall of the feeding tube through the barrel bottom, the upper end of the barrel wall is higher than the upper end of the feeding tube, and the lower part of the barrel wall is provided with a feeding port connected to the feeding tube;

[0008] The guide plate spirally rises and surrounds between the tube wall of the feed tube and the barrel wall of the reverse feed barrel.

[0009] Preferably, the feed pipe is connected to the feed port along the tangent direction of the barrel wall.

[0010] Preferably, the lower portion of the barrel wall bulges outward to form a feed channel whose radial distance from the central axis of the feed tube gradually increases, and the feed port is located at the end of the feed channel.

[0011] Preferably, the highest point of the guide plate is not lower than the upper end of the discharge pipe.

[0012] Preferably, the lowest point of the guide plate is not lower than the upper end of the feed inlet.

[0013] Preferably, the ratio of the diameter of the feed pipe to the radial width of the guide plate is 4:1 to 8:1.

[0014] Preferably, the ratio of the diameter of the feed pipe to the pitch of the guide plate is 4:1 to 8:1.

[0015] Preferably, the ratio of the diameter of the feed port to the pitch of the guide plate is 3:1 to 6:1.

[0016] Preferably, the flow stabilizing device of the reverse structure further comprises a dispersion disk, which is disposed at the lower portion of the feed tube and comprises a plurality of blades arranged at intervals around the central axis of the feed tube.

[0017] Preferably, the angle of attack of the blade is 25° to 35°.

[0018] Preferably, the ratio of the angle between two opposite blade edges of adjacent blades to the angle between adjacent blades is 1 / 3 to 1 / 2.

[0019] Preferably, the flow stabilizing device of the reverse structure further comprises a material guide cone, which is coaxially arranged at the lower part of the discharge pipe, and the bottom surface of the material guide cone is lower than the lower end of the discharge pipe.

[0020] Preferably, the bottom diameter of the material guide cone is greater than or equal to the diameter of the discharge pipe.

[0021] Preferably, the distance between the bottom surface of the material guide cone and the lower end of the discharge pipe is 15 cm to 25 cm.

[0022] Preferably, the cone angle of the material guide cone is 15 cm to 25 cm.

[0023] Preferably, at least one dosing point is provided on the reverse feeding barrel.

[0024] Preferably, the minimum distance between at least one of the dosing points and the feed inlet is less than 10 cm.

[0025] Preferably, at least one of the dosing points is arranged above the lowest point of the guide plate;

[0026] Preferably, at least one of the dosing points is arranged above the highest point of the guide plate.

[0027] Preferably, an opening penetrating through the reverse feeding barrel is provided at the dosing point.

[0028] The reverse-type flow stabilizing device provided in the embodiment of the present application realizes the reverse upward movement of the slurry through the reverse feeding barrel arranged outside the feeding pipe, so that its kinetic energy is gradually reduced before sedimentation. At the same time, the spiral guide plate arranged between the reverse flow guide barrel and the feeding pipe is used to construct a reverse upward channel that can guide the flow of the slurry, effectively avoiding the falling and secondary separation of the flocs that have been flocculated due to their own weight during the slurry ascent process, as well as the turbulence caused thereby. The slurry passes through the reverse-type flow stabilizing device, which can ensure the stability of the subsequent sedimentation process and significantly improve the sedimentation and concentration effects of the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a flow stabilizing device with a reverse structure according to some embodiments of the present application;

[0030] Figure 2 A schematic diagram of the principle of using a flow stabilizing device with a reverse structure according to some embodiments of the present application for pulp concentration;

[0031] Figure 3 A side view of a flow stabilizing device with a reverse structure according to some embodiments of the present application;

[0032] Figure 4 A top view of a flow stabilizing device with a reverse structure provided according to some embodiments of the present application;

[0033] Figure 5 A schematic half-section diagram of a flow stabilizing device with a reverse structure according to some embodiments of the present application;

[0034] Figure 6 Schematic diagram of the cooperation between the feed tube and the guide plate in some embodiments of the present application;

[0035] Figure 7 Schematic diagram of the structure of the dispersion disk and the material guide cone in some embodiments of the present application;

[0036] Figure 8 A top view of a dispersion disk and a material guide cone in some embodiments of the present application;

[0037] Fig. 9 A top view of a flow stabilizing device with a reverse structure provided according to some embodiments of the present application;

[0038] Fig.10A half-section top view of a flow stabilizing device of a reverse structure provided according to some embodiments of the present application;

[0039] Fig.11 A half-section top view of a flow stabilizing device of a reverse structure provided according to some embodiments of the present application;

[0040] Fig.12 A cross-sectional schematic diagram of a flow stabilizing device of a reverse structure provided according to some embodiments of the present application;

[0041] Fig.13 A schematic diagram of the three-dimensional structure of a flow stabilizing device with a reverse structure according to some embodiments of the present application;

[0042] Fig.14 A top view of a flow stabilizing device with a reverse structure provided according to some embodiments of the present application.

[0043] Numbers in the figure

[0044] Feed pipe 10, curved pipe 11, discharge pipe 20, dispersion disk 30, blades 31, connecting shaft 32, guide cone 40, reverse feed barrel 5, barrel wall 51, barrel bottom 52, feed port 53, feed channel 54, barrel cover 55, guide plate 60, starting end 601 of the guide plate, end 602 of the guide plate, reverse ascending channel 61, first opening 621, second opening 622, third opening 623, first dosing pipe 710, second dosing pipe 720, third dosing pipe 730, bottom plate 81, vertical plate 82, reverse structure flow stabilizing device 910, concentration tank 920. DETAILED DESCRIPTION

[0045] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0046] In addition, various components in the drawings are enlarged or reduced in size for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0047] Words importing the singular also include the plural and vice versa.

[0048] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of the embodiments of the present application are usually placed when in use, it is only for the convenience of describing the present application and simplifying the description, and does 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 cannot be understood as a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, the words first, second, etc. are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance, and their names may be different in the detailed description and claims of the present application.

[0049] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" 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, a direct connection, an indirect connection through an intermediate medium, or a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0050] As analyzed in the background technology, the equipment used to concentrate the slurry, such as the concentrator, needs to make the slurry that has settled in a fully flocculated state as much as possible. For this reason, a flow stabilizing device is generally required to be installed before the slurry enters the sedimentation. The ideal flow stabilizing device not only needs to reduce the kinetic energy of the slurry at the inlet and reduce the turbulence phenomenon to provide a good environment for the flocculant to act, but also needs to keep the flow direction and flow rate as stable as possible during the movement of the slurry to avoid mutual interference between components of different weights and volumes before settling through the down pipe.

[0051] To achieve the above objectives, the present application provides a flow stabilizing device with a reverse structure. Figure 1 The three-dimensional structure diagram of the reverse-type flow stabilizing device in some preferred embodiments is shown. Figure 2 The schematic diagram of the principle of the reverse-type flow stabilizing device being applied to a concentrator or other concentrating system to achieve the concentration of the slurry is shown in FIG. Figure 3 , 4 Further shown are a side view (the internal structure of which is indicated by dotted lines) and a top view of the reverse-type flow stabilizing device.

[0052] like Figures 1 to 4As shown, the reverse-type flow stabilizing device includes a feed pipe 10, a discharge pipe 20, a reverse feed barrel 5 and a guide plate 60, wherein the discharge pipe 20 is a circular tube with a certain thickness, arranged vertically, and its upper and lower ends are both open structures; the barrel wall 51 of the reverse feed barrel 5 is arranged on the outside of the discharge pipe 20, and the lower end of the barrel wall 51 is watertightly connected to the tube wall of the discharge pipe 20 through the barrel bottom 52, and the upper end of the barrel wall 51 is higher than the upper end of the discharge pipe 20, so that a space that accommodates and guides the flow of slurry is formed by the vertical tube wall of the discharge pipe 20, the barrel wall 51 of the reverse feed barrel 5 and the barrel bottom 52. In some embodiments, the upper part of the barrel wall 51 of the reverse feed barrel 5 has a circular tube structure similar to the discharge pipe 20, and is coaxially arranged with the discharge pipe 20. As shown in FIG. Figure 3 and Figure 4 As shown, the diameter of the upper part of the reverse feeding barrel 5 is D1, and the diameter of the discharge pipe 20 is D2 (generally, the wall thickness of the reverse feeding barrel 5 and the discharge pipe 20 is much smaller than their diameter or pipe diameter, so it can be considered that their respective inner diameter and outer diameter are basically the same), then the radial distance between the upper part of the barrel wall 51 of the reverse feeding barrel 5 and the discharge pipe 20 is L1 = (D2-D1) / 2.

[0053] Furthermore, a feed port 53 connected to the feed pipe 10 is opened at the lower part of the reverse feed barrel 5. The feed port 53 can be connected to the feed pipe 10 through a flange. The feed pipe 10 receives the slurry pumped in from the slurry pump directly or through an extended pipeline such as a bend pipe 11, and then introduces it into the reverse feed barrel 5 through the feed port 53. The slurry gradually rises to the upper end of the discharge pipe 20. During the rising process, the kinetic energy of the slurry is continuously weakened under the action of its own gravity and the water flow resistance below the liquid surface, thereby ensuring sufficient reaction between the slurry and the added flocculant to form as large flocs as possible, thereby effectively improving the flocculation effect; after reaching the upper end of the discharge pipe 20, the slurry enters the discharge pipe 20, settles from the upper end to the lower end of the discharge pipe 20 under the action of gravity, and continues to settle from the lower end of the discharge pipe 20 to the sedimentation layer of the concentration system.

[0054] In order to make the slurry rise in reverse between the downpipe 20 and the barrel wall 51 of the reverse feeding barrel 5, it is generally necessary to ensure the pressure of the slurry when it enters the feeding port 53. However, increasing the pressure there will intensify the turbulence of the slurry in the lower part of the reverse feeding barrel 5. If the pressure at the feeding port 53 is weakened, it will not only reduce the processing efficiency, but may also cause the condensed larger flocs to fall vertically when the slurry rises to the upper part of the reverse feeding barrel 5, thereby causing turbulence in the upper part of the reverse feeding barrel 5. The above-mentioned turbulence occurring in the lower and upper parts of the reverse feeding barrel 5 is caused by different reasons. Obviously, it is difficult to solve the above problems at the same time by only adjusting the pressure of the feeding port 53.

[0055] To this end, in the embodiments of the present application, Figure 3 , Figure 4As shown, a spirally ascending guide plate 60 is provided between the tube wall of the feed tube 20 and the barrel wall 51 of the reverse feed barrel 5. The guide plate 60 can be made of wear-resistant metal or other materials, and its two sides are continuously fixedly connected to the outer side of the tube wall of the feed tube 20 and the inner side of the barrel wall 51 of the reverse feed barrel 5 by welding, riveting or the like.

[0056] Figure 5 The schematic diagram of the half section of the flow stabilizing device of the reverse structure (the section line is Figure 4 CC line in the Figure 6 FIG. 2 is a schematic diagram of the cooperation between the feed pipe 20 and the guide plate 60, and the rotating arrow in the figure indicates the flow direction of the slurry. Figure 5 As shown, through the above-mentioned guide plate 60 structure, a spiral reverse rising channel 61 is formed between the tube wall of the discharge pipe 20 and the barrel wall 51 of the reverse feeding barrel 5. The reverse rising channel 61 can not only effectively rectify the flow direction of the slurry, thereby reducing the turbulence caused by the excessive flow velocity in the lower part of the reverse feeding barrel 5, but also because the upper and lower layers of the reverse rising channel 61 are isolated from each other by the guide plate 60, the slurry and the flocs generated by the flocculation of the slurry can only rise in the reverse direction under the push of the slurry pump, thereby effectively avoiding the turbulence caused by the direct fall of large-volume flocs on the upper part of the reverse feeding barrel 5, and avoiding the occurrence of secondary dispersion of the flocs due to falling during the reverse rising process.

[0057] In some preferred embodiments, Figure 1 , Figure 4 , Figure 5 As shown in the figure, the lower part of the barrel wall 51 is formed by convexity to form a feed channel 54 with a gradually increasing radial distance from the central axis of the feed tube 20. The increasing trend can be constructed in the form of an involute or a spiral line. The feed port 53 is located at the end of the feed channel 54, and the feed tube 10 is connected to the feed port 53 along the tangent direction of the barrel wall 51. Figure 5 As shown, by utilizing the feed channel 54 formed by the above-mentioned convexity, the flow cross-section of the slurry near the feed port 53 is larger than the flow cross-section of the reverse rising channel 61. Therefore, after entering the reverse feed barrel 5, the slurry can first rotate slowly in a larger bottom space, and then enter the spiral reverse rising channel 61 under the push of the internal slurry pressure and the guidance of the guide plate 60. The above-mentioned structure can effectively rectify the slurry entering the reverse feed barrel 5, thereby further reducing the turbulence phenomenon in the lower part of the reverse feed barrel 5.

[0058] like Figure 5 As shown, the starting end 601 of the guide plate is the lowest point of the guide plate 60, and the end 602 of the guide plate is the highest point of the guide plate 60. In some preferred embodiments, as shown in FIG. Figure 5As shown, the height of the starting end 601 of the guide plate is not lower than the top of the feed channel 54, that is, the lowest point of the guide plate 60 is not lower than the upper end of the feed port 53, so that after entering the reverse feed barrel 5, the slurry is first rectified by rotating along the outer surface of the discharge pipe 20, and then enters the reverse ascending channel 61 along the guide plate 60.

[0059] In order to optimize the flow stabilizing effect of the guide plate 60 and the reverse rising channel 61, it is necessary to optimize the width, slope and slurry flow rate at each position of the guide plate 60. To this end, in some preferred embodiments, the ratio of the diameter D2 of the feed pipe 20 to the radial width of the guide plate 60 (obviously, the radial width is L1) is 4:1 to 8:1. In other preferred embodiments, the ratio of the diameter of the feed pipe 20 to the pitch L2 of the guide plate 60 is 4:1 to 8:1. In other preferred embodiments, the ratio of the diameter of the feed port 53 to the pitch of the guide plate 60 is 3:1 to 6:1. Through the above settings, the smooth reverse flow of the slurry can be achieved while ensuring the slurry flow rate per unit time, taking into account the slurry processing speed and effect.

[0060] After the slurry rises along the reverse rising channel 61 and enters the discharge pipe 20, it will settle under the action of its own weight. At this time, the flocculated flocs in the slurry are of different sizes. The descending speed of some flocs with too large volume is significantly greater than that of other flocs with smaller volume. If they are not treated, they may cause impact on the sedimentation layer below the discharge pipe 20, affecting the stable sedimentation effect. Therefore, it is necessary to try to ensure that the volume, weight and falling speed of the slurry flocs are consistent when they settle from the lower end of the discharge pipe 20. For this reason, in some preferred embodiments of the present application, Figure 5 As shown in the figures, the reverse-type flow stabilizing device further includes a dispersion disk 30 and a material guide cone 40 .

[0061] Figure 7 and Figure 8 1 and 2 show the structural schematic diagram and top view of the dispersion plate 30 and the guide cone 40 in some preferred embodiments. The dispersion plate 30 is generally arranged at the lower part of the feed pipe 20, such as Figure 7 As shown, it is composed of a plurality of blades 31 arranged at intervals around the central axis of the feed tube 20. Each blade 31 can be fixedly connected by a connecting shaft 32 that is coaxial with the central axis of the feed tube 20 and extends radially toward the wall of the feed tube 20. Preferably, the outer side of the blade 31 is fixedly connected to the wall of the feed tube 20.

[0062] Furthermore, each blade 31 is inclined relative to the horizontal direction, and the angle of attack of the blade 31 is 25° to 35°. Figure 8As shown, the ratio of the angle θ2 between two opposite blade edges of adjacent blades to the angle θ1 of adjacent blades is 1 / 3 to 1 / 2. The plurality of blades 31 arranged obliquely and having gaps above allow the slurry containing flocs to fall downward in a fan-shaped and diffuse manner from each gap, and the oversized flocs are dispersed through the gaps, further ensuring the uniformity and consistency of the sedimentation components.

[0063] Furthermore, if Figure 7 As shown, in some preferred embodiments of the present application, a guide cone 40 is further provided below the dispersion disk 30, and the guide cone 40 is also coaxial with the feed pipe 20, and its bottom surface is lower than the lower end of the feed pipe 20. In some preferred embodiments, the distance between the bottom surface of the guide cone 40 and the lower end of the feed pipe 20 is greater than or equal to 15 cm and less than or equal to 20 cm; in other preferred embodiments, the bottom surface diameter of the guide cone 40 is greater than or equal to the inner diameter of the tube wall of the feed pipe 20, and its cone angle φ ranges from 120° to 150°. The guide cone 40 can further disperse the slurry settled at the outlet of the feed pipe 20, and prevent the vertical fluid from directly impacting the sedimentation layer at the bottom of the concentration tank.

[0064] In some optional embodiments, such as Figure 7 As shown, the upper end of the guide cone 40 can be fixed to the connecting shaft 32. In other optional embodiments, in order to enhance the firmness of the connection, it can also be as shown in FIG. Figure 1 , Figure 5 As shown in the figures, a bottom plate 81 for supporting the material guiding cone 40 is provided below the bottom surface of the material guiding cone 40 and is connected to the lower end of the material discharge pipe 20 through a plurality of circumferentially distributed vertical plates 82 .

[0065] During the flow of the slurry from the feed pipe 10 to the reverse feed barrel 5 to the discharge pipe 20, the slurry rises and falls horizontally and rotationally in sequence. During the above process, the flow rate, flow state, etc. of the slurry are constantly changing. In order to make the slurry reach an ideal flocculation state when it settles to the concentration tank 920 at the bottom of the discharge pipe 20, in some preferred embodiments, a plurality of dosing points are provided on the reverse feed barrel 5 for adding flocculants at different positions.

[0066] A variety of optional implementations can be used to add flocculants at the dosing points. For example, a pipe for adding flocculants can be pre-buried in the barrel wall of the reverse feed barrel 5, and openings can be set at each dosing point. In addition, a through opening can be set on the feed pipe 10 and / or the reverse feed barrel 5, and a pipe with a one-way valve or the like can be extended into the opening to add flocculants.

[0067] Fig. 9 , Fig.10In some preferred embodiments, the first opening 621 , the second opening 622 and the third opening 623 which are respectively arranged at the feeding channel 54 , the lower part and the upper part of the reverse feeding barrel 5 are respectively shown. Fig.11 , Fig.12 (The cutting line is Fig. 9 FF line in the Fig.13 , a first dosing tube 710 , a second dosing tube 720 , and a third dosing tube 730 are respectively provided at three openings.

[0068] Preferably, the first opening 621 is close to the edge of the feed inlet 53 and the distance from the feed inlet 53 is less than 10 cm, the second opening 622 is arranged above the starting end 601 of the guide plate, and the third opening 623 is arranged above the end 602 of the guide plate. Fig.12 As shown, the height of the end 602 of the guide plate exceeds the upper end of the discharge pipe 20, or is flush with the upper end of the discharge pipe 20, that is, the highest point of the guide plate 60 is not lower than the upper end of the discharge pipe 20, so that the slurry rising to the top of the discharge pipe 20 can smoothly enter the discharge pipe 20.

[0069] The locations of the above three dosing points correspond to the flow speed and flow state of the slurry at different locations. Among them, the dosing point corresponding to the first opening 621 is closest to the slurry pump, where the flow speed of the slurry is the fastest and the flow state is the most unstable. Adding flocculant here can make the flocculant fully and evenly mixed with the slurry and cause the particles in the slurry to begin to flocculate; the dosing point corresponding to the second opening 622 is located at the lower part of the reverse feed barrel 5 and above the reverse ascending channel 61. After the slurry enters the reverse feed barrel 5, it first rotates at its lower part to make the flow state gradually become regular, and at the same time, under the action of pressure, the slurry is rotated at its lower part. The slurry is lifted up and enters the reverse ascending channel 61 in a spiral manner. After the flocculant is added there, as the speed of the added slurry gradually slows down during the rotating ascending process, the turbulence phenomenon gradually weakens, the flocculation effect gradually strengthens, and the flocs can be increased more evenly. The dosing point corresponding to the third opening 623 is set at the end of the reverse ascending channel 61. The slurry flows circumferentially here into the feed pipe 20 and enters the sedimentation process. Under ideal conditions, the slurry should flow smoothly and slowly in the horizontal direction here, and the particles contained therein are fully flocculated, and the floc size distribution is relatively uniform, so that the regularity and consistency of sedimentation can be achieved under the action of gravity. By adding flocculant here, the amount of flocculant added can be adjusted according to the flow state of the slurry and the size and distribution of the flocs during the process of the slurry turning from reverse ascending to gravity sedimentation, so that the slurry can reach an ideal flocculation state.

[0070] Fig.13 Another optional embodiment of the flow stabilizing device of the reverse structure is also shown, such as Fig.13As shown, in this embodiment, the top of the reverse feeding barrel 5 is an open structure, which can conveniently monitor the flow condition of the slurry at the upper end of the feeding pipe 20.

[0071] Fig.14 A top view of another optional embodiment of the flow stabilizing device of the reverse structure is shown. Fig.14 As shown, in this embodiment, the upper and lower parts of the barrel wall 51 of the reverse feeding barrel 5 maintain the same size, and no protrusion is formed at the lower part. This structure is suitable for situations where there are certain restrictions on the installation size of the equipment.

[0072] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications may be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A flow stabilizing device of reverse structure, comprising a feed pipe and a vertical feed pipe, wherein the upper and lower ends of the feed pipe are both open structures, characterized in that: It also includes a reverse feeding barrel and a guide plate; The barrel wall of the reverse feeding barrel is arranged on the outer side of the feeding tube, the lower end of the barrel wall is watertightly connected to the tube wall of the feeding tube through the barrel bottom, the upper end of the barrel wall is higher than the upper end of the feeding tube, and the lower part of the barrel wall is provided with a feeding port connected to the feeding tube; The guide plate spirally rises and surrounds between the tube wall of the feed tube and the barrel wall of the reverse feed barrel.

2. The reverse-type flow stabilizing device according to claim 1, characterized in that: The feed pipe is connected with the feed port along the tangent direction of the barrel wall.

3. The reverse-type flow stabilizing device according to claim 1, characterized in that: The lower part of the barrel wall bulges outward to form a feeding channel with a gradually increasing radial distance from the central axis of the feeding pipe, and the feeding port is located at the end of the feeding channel.

4. The reverse-type flow stabilizing device according to claim 1, characterized in that: The highest point of the guide plate is not lower than the upper end of the feed tube.

5. The reverse-type flow stabilizing device according to claim 1, characterized in that: The lowest point of the guide plate is not lower than the upper end of the feed inlet.

6. The reverse-type flow stabilizing device according to claim 1, characterized in that: The ratio of the diameter of the feed pipe to the radial width of the guide plate is 4:1 to 8:

1.

7. The reverse-type flow stabilizing device according to claim 1, characterized in that: The ratio of the diameter of the feed pipe to the pitch of the guide plate is 4:1 to 8:

1.

8. The reverse-type flow stabilizing device according to claim 1, characterized in that: The ratio of the diameter of the feed port to the pitch of the guide plate is 3:1 to 6:

1.

9. The reverse-type flow stabilizing device according to claim 1, characterized in that: The invention also comprises a dispersion plate, which is arranged at the lower part of the feeding tube and comprises a plurality of blades arranged at intervals around the central axis of the feeding tube.

10. The reverse-type flow stabilizing device according to claim 1, characterized in that: It also includes a material guide cone, which is coaxially arranged at the lower part of the material discharge pipe, and the bottom surface of the material guide cone is lower than the lower end of the material discharge pipe.

11. The reverse-type flow stabilizing device according to claim 1, characterized in that: At least one dosing point is arranged on the reverse feeding barrel.

12. The reverse-type flow stabilizing device according to claim 11, characterized in that: The minimum distance between at least one of the dosing points and the feed inlet is less than 10 cm.

13. The reverse-type flow stabilizing device according to claim 11, characterized in that: At least one of the dosing points is arranged above the lowest point of the guide plate.

14. The reverse-type flow stabilizing device according to claim 11, characterized in that: At least one of the dosing points is arranged above the highest point of the guide plate.

15. The reverse-type flow stabilizing device according to any one of claims 11 to 14, characterized in that: An opening penetrating the feed pipe and / or the reverse feed barrel is provided at the dosing point.

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