A mobile mixing device
By controlling the power and orientation of the first and second propeller-type agitators, combined with a buoyancy mechanism and an automatic telescopic mechanism, the problem of high cost of fixed agitators in large-volume fermentation broth is solved, and flexible adjustment of the agitation position and expansion of the agitation area are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU UNIV
- Filing Date
- 2023-11-28
- Publication Date
- 2026-07-21
AI Technical Summary
Existing stationary mixing devices are costly and difficult to achieve uniform mixing when processing large volumes of fermentation broth, and cannot meet the needs of large-area mixing.
By employing a first-propulsion type and a second-propulsion type agitator, and by controlling their power and orientation, combined with a buoyancy mechanism and an automatic telescopic mechanism, the agitation position can be controlled to change and the agitation area can be expanded.
It enables flexible adjustment of the stirring position in large-volume fermentation broth, increases the stirring area and applicability, and reduces equipment costs.
Smart Images
Figure CN117427541B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fluid mixing technology, and in particular to a mobile mixing device. Background Technology
[0002] Under certain conditions, organic matter can be converted into biogas by microorganisms. Common plant straw, human and animal excrement, leaves and weeds, urban garbage, factory organic wastewater, and sewage sludge from sewage treatment plants can all be used as raw materials for biogas fermentation. In the process of recycling agricultural waste to obtain biogas and other biomass energy, mechanical stirring is a crucial step in the entire anaerobic fermentation process. It plays a vital role in the recycling of renewable resources, ensuring that the fermentation raw materials and microorganisms are fully mixed and in uniform contact, thereby providing sufficient food for the microorganisms and preventing material crusting and sedimentation to ensure full fermentation and improve the gas production rate.
[0003] Currently, the industry mainly uses fixed mechanical agitators as the common agitation method. When the volume of fermentation liquid is small, fixed mechanical agitators can achieve the purpose of mixing the liquid in the tank evenly. However, when the volume of fermentation liquid is large, the fixed mechanical agitator has a certain range of action, which makes it unable to meet the requirement of mixing large volumes of materials evenly. In this case, multiple fixed mechanical agitators are often required, which is costly.
[0004] Therefore, there is an urgent need for a mobile mixing device that can change the mixing position, has a wide range of applications, and can achieve mixing over a larger area. Summary of the Invention
[0005] The purpose of this invention is to provide a mobile stirring device to solve the problems existing in the prior art. By controlling the power of the first and second propeller stirrers, the stirring position can be changed, thereby achieving the purpose of controllable stirring position replacement, increasing the stirring area, and expanding the applicability of the device.
[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a mobile stirring device, including a first propeller-type stirrer, a second propeller-type stirrer, a connecting member, and a buoyancy mechanism for providing buoyancy. The output shafts of the first propeller-type stirrer and the second propeller-type stirrer are located on the same horizontal plane, and the stirring impellers of the first propeller-type stirrer and the second propeller-type stirrer have different orientations. Both the first propeller-type stirrer and the second propeller-type stirrer are connected to the buoyancy mechanism through the connecting member.
[0007] Preferably, the impellers of the first propeller agitator and the second propeller agitator face opposite directions.
[0008] Preferably, a rotating device that provides rotational motion is provided between the connector and the buoyancy mechanism.
[0009] Preferably, the connecting member is an automatic telescopic mechanism, and both the first propulsion agitator and the second propulsion agitator are connected to the buoyancy mechanism through the automatic telescopic mechanism.
[0010] Preferably, the automatic telescopic mechanism is a multi-section hydraulic telescopic arm.
[0011] Preferably, the first propeller agitator and the second propeller agitator are connected by a sleeve, and the sleeve is connected to the buoyancy mechanism through the connector.
[0012] Preferably, the sleeve, the first propeller agitator, and the second propeller agitator are provided with a lower support for providing protection, and the lower support is fixedly connected to the sleeve via a connecting rod.
[0013] Preferably, the buoyancy mechanism includes an upper support and a float, the upper support is fixedly connected to the float, and the top end of the connector is fixedly connected to the upper support.
[0014] Preferably, both the first propulsion agitator and the second propulsion agitator include a hydraulic motor and an agitator impeller. The agitator impeller is fixedly mounted on the output shaft of the hydraulic motor. The float is equipped with a first hydraulic pump station and a first oil tank that provide power to the first propulsion agitator. The float is also equipped with a second hydraulic pump station and a second oil tank that provide power to the second propulsion agitator. The first hydraulic pump station, the second hydraulic pump station, the first oil tank, and the second oil tank are symmetrically arranged in the inner cavity of the float.
[0015] Preferably, the stirring impeller includes a drive shaft and several axial flow blades. The several axial flow blades are fixedly arranged on the drive shaft in the circumferential direction. One end of the drive shaft is connected to the output shaft of the hydraulic motor through a coupling, and the other end has a conical structure.
[0016] The present invention achieves the following main technical effects compared to the prior art:
[0017] When the included angle between the output shafts of the first and second propeller agitators is not equal to 180°, the entire device moves forward under the propulsion force when the power of the first and second propeller agitators is the same. When the power of the first and second propeller agitators is different, the entire device turns while moving forward under the propulsion force. That is, by controlling the first and second propeller agitators, the overall device can be controlled to change the stirring position. With the dual agitator setup, the stirring area can be increased, making this device suitable for environments with large fermentation liquid volumes.
[0018] Other solutions of the present invention achieve the following technical effects compared with the prior art:
[0019] When the impellers of the first and second propeller mixers face opposite directions, by controlling the power of the first and second propeller mixers to be the same, the propulsive forces generated by the two can be canceled out, achieving in-situ mixing, which is suitable for environments with small fermentation liquid volumes.
[0020] The automatic telescopic mechanism can control the stirring depth of the first and second propeller agitators, enabling the device to stir fermentation broth at different depths, further improving the applicability of the device.
[0021] By placing the first hydraulic pump station, the second hydraulic pump station, the first oil tank, and the second oil tank inside the pontoon, the space utilization rate can be effectively improved, while the pontoon provides protection for each component. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a front view of the mobile stirring device of the present invention;
[0024] Figure 2 This is a left view of the mobile stirring device of the present invention;
[0025] Figure 3 This is a schematic diagram of the structure of the stirring impeller of the present invention;
[0026] Figure 4 This is a axial projection view of the stirring impeller of the present invention;
[0027] Among them, 1. First propeller agitator; 2. Second propeller agitator; 3. Sleeve; 4. Lower support; 5. Upper support; 6. Float; 7. Hydraulic motor; 8. Agitator impeller; 9. First hydraulic pump station; 10. First oil tank; 11. Second hydraulic pump station; 12. Second oil tank; 13. Multi-section hydraulic telescopic boom; 14. Rotating equipment; 15. Drive shaft; 16. Axial flow blades; 17. Coupling; 18. Stop bar. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] The purpose of this invention is to provide a mobile stirring device to solve the problems existing in the prior art. By controlling the power of the first and second propeller stirrers, the stirring position can be changed, thereby achieving controllable stirring position replacement, increasing the stirring area, and expanding the applicability of the device.
[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0031] Please refer to the following: Figures 1-4 As shown, a mobile mixing device is provided, including a first propeller mixer 1, a second propeller mixer 2, a connecting member, and a buoyancy mechanism. The output shafts of the first propeller mixer 1 and the second propeller mixer 2 are located on the same horizontal plane. The impellers 8 of the first propeller mixer 1 and the second propeller mixer 2 are oriented differently. The different orientations are divided into two cases: one is that the included angle between the output shafts of the first propeller mixer 1 and the second propeller mixer 2 is not equal to 180°, and the other is that the included angle between the output shafts of the first propeller mixer 1 and the second propeller mixer 2 is equal to 180°. The first propeller mixer 1 and the second propeller mixer 2 are both connected to the buoyancy mechanism through the connecting member. The buoyancy mechanism mainly provides buoyancy to ensure that the first propeller mixer 1 and the second propeller mixer 2 do not sink.
[0032] When the included angle between the output shafts of the first propeller agitator 1 and the second propeller agitator 2 is not equal to 180°, the entire device moves forward under the action of propulsion force when the power of the first propeller agitator 1 and the second propeller agitator 2 is the same. When the power of the first propeller agitator 1 and the second propeller agitator 2 is different, the entire device turns while moving forward under the action of propulsion force. That is, by controlling the first propeller agitator 1 and the second propeller agitator 2, the overall device can be controlled to change the stirring position. With the setting of dual agitators, the stirring area can be increased, making this device suitable for environments with large fermentation liquid volumes.
[0033] When the included angle between the output shafts of the first propeller agitator 1 and the second propeller agitator 2 is equal to 180°, that is, when the impellers 8 of the first propeller agitator 1 and the second propeller agitator 2 face opposite directions, by controlling the power of the first propeller agitator 1 and the second propeller agitator 2 to be the same, the propulsive forces generated by the two can be canceled out, achieving in-situ mixing, which is suitable for environments with small fermentation liquid volumes; by controlling the power of the first propeller agitator 1 and the second propeller agitator 2 to be different, or by controlling one of them to reverse after switching through a reversing valve, or by controlling one of them to stop rotating, the movement of the entire device along the output shaft axis can be achieved.
[0034] Since the impellers 8 of the first propeller mixer 1 and the second propeller mixer 2 will lose their turning ability when they face opposite directions, a rotating device 14 that provides rotational motion needs to be set between the connector and the buoyancy mechanism. The rotation setting controls the orientation of the output shafts of the first propeller mixer 1 and the second propeller mixer 2, thereby controlling the movement direction of the entire device.
[0035] The connecting part is an automatic telescopic mechanism. Both the first propeller-type agitator 1 and the second propeller-type agitator 2 are connected to the buoyancy mechanism through the automatic telescopic mechanism. The automatic telescopic mechanism can be an electric, pneumatic or hydraulic telescopic device. The automatic telescopic mechanism can control the stirring depth of the first propeller-type agitator 1 and the second propeller-type agitator 2, so that the device can stir fermentation liquid at different depths, further improving the applicability of the device.
[0036] In this embodiment, the first propeller mixer 1 and the second propeller mixer 2 are connected by a sleeve 3. The specific connection method is as follows: the drive ends of the first propeller mixer 1 and the second propeller mixer 2 that are far from the output end are both sleeved in the sleeve 3 and then fixed with bolts. The sleeve 3 is connected to the buoyancy mechanism through a connector. The end of the connector can be welded to the sleeve 3 or bolted.
[0037] The sleeve 3, the first propeller agitator 1 and the second propeller agitator 2 are provided with a lower support 4 for protection. The lower support 4 can be a square frame structure or a cylindrical frame structure, etc. The lower support 4 is used to avoid damage caused by collision between the internal structure and the pool wall of the liquid storage tank. A connecting rod is welded or bolted to the lower support 4. The end of the connecting rod away from the lower support 4 is welded or bolted to the sleeve 3 to fix the position of the lower support 4.
[0038] The specific structure of the buoyancy mechanism includes an upper support 5 and at least one float 6. The upper support 5 and the float 6 are fixedly connected. The fixed connection can be a bolt connection or a binding connection. When bolted, a lug can be provided on the float 6 and fixedly connected to the upper support 5 with bolts using the lug. The top end of the connector is fixedly connected to the upper support 5 with bolts or welded.
[0039] The pontoon 6 selected in this embodiment is cylindrical with spherical end faces on both axial sides, and is made of high-density polyethylene.
[0040] The upper support 5 can be a plate structure or a rectangular frame structure. On the upper surface of the upper support 5, baffles extending along the axial direction of the float 6 are set at the positions corresponding to both sides of the float 6, or baffles 18 are set vertically at the four corners of the upper support 5. The bottom part of the float 6 is embedded between two baffles or four baffles 18 to limit the float 6 radially.
[0041] When the stop bar 18 is set, the upper end surface of the stop bar 18 is an arc-shaped surface that matches the outer wall surface of the float 6.
[0042] Both the first propeller agitator 1 and the second propeller agitator 2 include a hydraulic motor 7 and an agitator impeller 8. The agitator impeller 8 is fixedly mounted on the output shaft of the hydraulic motor 7. The float 6 contains a first hydraulic pump station 9 and a first oil tank 10 that provide power to the first propeller agitator 1. The float 6 also contains a second hydraulic pump station 11 and a second oil tank 12 that provide power to the second propeller agitator 2. The hydraulic pump stations, oil tanks, and hydraulic motor 7 are all connected using flexible hoses. When a rotating device 14 is installed, a longer flexible hose is required to prevent damage when the lower hydraulic motor 7 is adjusted. In the event of a hose breaking due to insufficient length, the first hydraulic pump station 9, the second hydraulic pump station 11, the first oil tank 10, and the second oil tank 12 are symmetrically arranged in the inner cavity of the float 6 to ensure the gravity balance of the float 6. When multiple floats 6 are set, the first hydraulic pump station 9 and the second hydraulic pump station 11 can be set at both ends of each float 6, or the first hydraulic pump station 9 and the second hydraulic pump station 11 can be set at the diagonal of the entire float group, or when the number of floats 6 is odd, the first hydraulic pump station 9 and the second hydraulic pump station 11 can be set at both ends of the inner cavity of the middle float 6.
[0043] After the first hydraulic pump station 9 and the second hydraulic pump station 11 are installed inside the pontoon 6, the automatic telescopic mechanism is selected as a multi-section hydraulic telescopic arm 13 with at least two sections, and the rotating device 14 is selected as a hydraulic rotary transmission device or a hydraulic motor, using the hydraulic pump station as the power source for both.
[0044] The location where the hydraulic pump station's hoses exit the float 6 and the underwater equipment both need to be sealed and waterproofed.
[0045] The stirring impeller 8 includes a drive shaft 15 and 2-4 axial flow blades 16. The axial flow blades 16 are fixedly mounted on the drive shaft 15 in the circumferential direction. The outer surfaces of the drive shaft 15 and the axial flow blades 16 are smoothed to prevent material entanglement. One end of the drive shaft 15 is connected to the output shaft of the hydraulic motor 7 through a coupling 17, and the other end is a conical structure. Preferably, the front end of the conical structure is rounded to reduce hydraulic loss.
[0046] The axial flow blades 16 are made of corrosion-resistant and highly wear-resistant materials to adapt to underwater environments.
[0047] Specifically, the diameter of the drive shaft 15 is d, the maximum diameter of the axial flow blade 16 when rotating is 5d, the axial height of the axial flow blade 16 is 0.75d, the thickness of the axial flow blade 16 is 0.08-0.09d, the outer edge of the axial flow blade 16 adopts a circular arc structure, which makes the shape of the axial flow blade 16 streamlined. The wrap angle of the axial flow blade 16 is 80-120 degrees, the inlet angle is 13-30 degrees, and the outlet angle is 20-25 degrees. When viewed from a direction perpendicular to the shaft, the axial flow blade 16 is elliptical in shape, and the axial height of the tapered structure at the front end of the drive shaft 15 is 0.64d.
[0048] In actual use, the first propeller agitator 1 and the second propeller agitator 2 are started. The impellers 8 of the first propeller agitator 1 and the second propeller agitator 2 generate axial propulsion force. By controlling the power of the first propeller agitator 1 and the second propeller agitator 2, the movement direction of the whole device can be controlled, thereby changing the stirring position. When applied to large-volume fermentation liquid, the stirring position can be continuously changed to achieve stirring of the whole fermentation liquid, without the need for too many fixed agitators.
[0049] Any adaptive changes made according to actual needs are within the scope of protection of this invention.
[0050] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0051] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. A mobile stirring device, characterized in that, It includes a first propeller agitator, a second propeller agitator, a connector, and a buoyancy mechanism for providing buoyancy. The output shafts of the first propeller agitator and the second propeller agitator are located on the same horizontal plane. The agitator impellers of the first propeller agitator and the second propeller agitator have different orientations. Both the first propeller agitator and the second propeller agitator are connected to the buoyancy mechanism through the connector. The included angle between the output shafts of the first and second propeller mixers is not equal to 180°. When the power of the first and second propeller mixers is the same, the whole device moves forward under the action of propulsion force. When the power of the first and second propeller mixers is different, the whole device turns while moving forward under the action of propulsion force. By controlling the first and second propeller mixers, the mixing position of the whole device can be changed. Alternatively, the included angle between the output shafts of the first and second propeller agitators is 180°, and the impellers of the first and second propeller agitators face opposite directions. By controlling the power of the first and second propeller agitators to be the same, the propulsive forces generated by the two agitators can be canceled out, achieving in-situ mixing. By controlling the power of the first and second propeller agitators to be different, or by controlling one of them to reverse after switching through a reversing valve, or by controlling one of them to stop rotating, the movement of the entire device along the output shaft axis can be achieved. A rotating device that provides rotational motion is provided between the connecting member and the buoyancy mechanism. The direction of the output shafts of the first and second propeller agitators is controlled by the rotating device, thereby controlling the movement direction of the entire device.
2. The mobile stirring device according to claim 1, characterized in that, The connecting component is an automatic telescopic mechanism, and both the first propulsion mixer and the second propulsion mixer are connected to the buoyancy mechanism through the automatic telescopic mechanism.
3. The mobile stirring device according to claim 2, characterized in that, The automatic telescopic mechanism is a multi-section hydraulic telescopic arm.
4. The mobile stirring device according to claim 1, characterized in that, The first propeller agitator and the second propeller agitator are connected by a sleeve, and the sleeve is connected to the buoyancy mechanism through the connector.
5. The mobile stirring device according to claim 4, characterized in that, The sleeve, the first propeller mixer, and the second propeller mixer are provided with a lower support for providing protection. The lower support is fixedly connected to the sleeve via a connecting rod.
6. The mobile stirring device according to claim 1, characterized in that, The buoyancy mechanism includes an upper support and a float, the upper support is fixedly connected to the float, and the top end of the connector is fixedly connected to the upper support.
7. The mobile stirring device according to claim 6, characterized in that, Both the first and second propulsion agitators include a hydraulic motor and an agitator impeller. The agitator impeller is fixedly mounted on the output shaft of the hydraulic motor. The float is equipped with a first hydraulic pump station and a first oil tank that provide power to the first propulsion agitator. The float is also equipped with a second hydraulic pump station and a second oil tank that provide power to the second propulsion agitator. The first and second hydraulic pump stations, the first and second oil tanks are symmetrically arranged in the inner cavity of the float.
8. The mobile stirring device according to claim 7, characterized in that, The stirring impeller includes a drive shaft and several axial flow blades. The several axial flow blades are fixedly arranged on the drive shaft in the circumferential direction. One end of the drive shaft is connected to the output shaft of the hydraulic motor through a coupling, and the other end has a conical structure.