A variable cross-section flow guide device based on saddle surface

Abstract

The present invention provides a variable cross-section flow guide device based on a saddle surface, comprising an upper support ring, a lower support ring and a plurality of connecting rods arranged in a vertical direction, wherein the upper support ring and the lower support ring are both annular structures with a through middle portion, the upper support ring and the lower support ring are arranged concentrically and in parallel, the connecting rod comprises an upper end portion and a lower end portion, each of the connecting rods is arranged along the circumference of the upper support ring and the lower support ring, and the upper end portion is hinged to the upper support ring, and the lower end portion is hinged to the lower support ring, and the upper support ring and the lower support ring rotate relative to each other so that the upper end portion and the lower end portion move relative to each other, and then the connecting rod tilts. The variable cross-section flow guide device of the present invention is not only highly efficient and energy-saving, but also has a simple structure and low manufacturing cost.

Description

Technical Field

[0001] The invention relates to auxiliary smoke exhaust equipment, in particular to a variable-section flow guide device based on a saddle surface. Background Art

[0002] Nowadays, the concept of environmental protection is becoming more and more popular, and the whole country is working together to achieve the goal of "Beautiful China". Taking flue gas treatment as an example, the most commonly used and relatively effective method by enterprises is the sintering flue gas circulation technology, but this method also has its drawbacks. In the actual operation of the boiler or sintering machine, its load will change according to external conditions. When operating at full load, the flow rate at the bottom of the dry desulfurization absorption tower can meet the requirement of no ash falling, and there is no need to make up flue gas. When operating at low load, the flow rate at the bottom of the absorption tower is low, and the circulating flue needs to make up the flue gas back to the bottom of the absorption tower to ensure that the flow rate at the bottom of the tower is high and no ash falling occurs, but the flue gas in the circulating flue increases the energy loss to a certain extent.

[0003] In view of the shortcomings of the current technology, the inventor conducted in-depth research on how to increase the flow rate of flue gas in the circulating flue, which led to the present case. Summary of the invention

[0004] The object of the present invention is to provide a variable cross-section flow guide device based on a saddle surface, which is not only highly efficient and energy-saving, but also has a simple structure and low manufacturing cost.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A variable cross-section flow guide device based on a saddle surface, comprising an upper supporting ring, a lower supporting ring and a plurality of connecting rods arranged in the upper and lower parts, wherein the upper supporting ring and the lower supporting ring are both annular structures with a through middle part, the upper supporting ring and the lower supporting ring are arranged concentrically and in parallel, the connecting rod comprises an upper end portion and a lower end portion, each of the connecting rods is arranged along the circumference of the upper supporting ring and the lower supporting ring, and the upper end portion is hinged to the upper supporting ring, and the lower end portion is hinged to the lower supporting ring, the upper supporting ring and the lower supporting ring are rotated relative to each other so that the upper end portion and the lower end portion move relative to each other, and then the connecting rod is tilted.

[0007] Furthermore, limiting devices are provided on the upper supporting ring and the lower supporting ring, and the limiting devices can limit the axial distance between the upper supporting ring and the lower supporting ring, and the connecting rod is a hydraulic telescopic rod whose length can be changed.

[0008] Furthermore, the limiting device includes a circular ring group for limiting the axial movement of the lower supporting ring and no less than two cylindrical brackets, and the circular ring group and the upper supporting ring are fixedly connected through the cylindrical brackets.

[0009] Furthermore, the ring group includes an upper ring and a lower ring respectively arranged above and below the lower support ring, the upper ring and the lower ring are both annular structures with a through middle portion, the cylindrical bracket includes a connecting end and a fixed end, the connecting end is fixedly connected to the upper ring and the lower ring, the connecting end is provided with a limiting roller between the upper ring and the lower ring, the outer side surface of the limiting roller is in contact with the outer side surface of the lower support ring, and the fixed end is fixedly connected to the outer side wall of the upper support ring.

[0010] Furthermore, the connecting end passes through the lower circular ring, and a base is fixedly provided at the bottom of the connecting end. The outer wall of the upper supporting ring has a limiting block extending outward corresponding to each of the cylindrical supports, and the fixed end is fixedly connected to the corresponding limiting block.

[0011] Furthermore, a handle is protruding outwardly from the outer side wall of the lower supporting ring, and one of the handles is arranged between the two cylindrical brackets.

[0012] Furthermore, three cylindrical supports are arranged at intervals along the circumference of the upper support ring and the circular ring group, and the interval between every two cylindrical supports is 120°.

[0013] Furthermore, the upper supporting ring and the lower supporting ring are connected by 12 connecting rods, the upper end portion is hinged to the upper supporting ring through a ball hinge, and the lower end portion is hinged to the lower supporting ring through a ball hinge.

[0014] Compared with the existing technology, the present invention has the following beneficial effects: the present invention is based on a variable cross-section flow guide device of a saddle surface, and by rotating the lower support ring, the rotation of the lower support ring correspondingly drives the inclination, extension and rotation of the connecting rod connected to the lower support ring, so that the connecting rod squeezes the outer wall of the elastic pipe, and then the elastic pipe forms a continuously changing flow guide cross-section, so that the boiler or sintering machine can still ensure the flow rate of flue gas under different loads without causing ash falling, and ultimately reduce the loss of power and energy, greatly improving the efficiency of the desulfurization device; and the present flow guide device also has the advantages of simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a partial structural schematic diagram of the present invention;

[0017] Figure 3 It is a schematic diagram of the connecting rod structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the working state of an embodiment of the present invention;

[0019] Figure 5A top view of an embodiment of the present invention;

[0020] Figure 6 A bottom view of an embodiment of the present invention;

[0021] Figure 7 This is a diagram of an elastic pipeline according to an embodiment of the present invention.

[0022] Description of labels:

[0023] Upper supporting ring 1, limiting block 11, lower supporting ring 2, outer side surface 21 of lower supporting ring, connecting rod 3, upper end 31, lower end 32, elastic pipe 4, limiting device 5, circular ring group 51, upper circular ring 511, lower circular ring 512, cylindrical bracket 52, connecting end 521, fixed end 522, limiting roller 53, outer side surface 531 of limiting roller, base 54, handle 6, ball hinge 7 DETAILED DESCRIPTION

[0024] In order to further explain the technical solution of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In order to make the implementation purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the terms "corresponding", "between", "parallel", "upper", "lower", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 invention.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection 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.

[0028] The present invention provides a variable cross-section flow guide device based on a saddle surface. The flow guide device is fixed on the path of an elastic pipe 4 when in use. Figure 1-7 As shown, it includes an upper supporting ring 1, a lower supporting ring 2 and a plurality of connecting rods 3 which are arranged in an upper and a lower manner. The upper supporting ring 1 and the lower supporting ring 2 are both annular structures with a through middle portion. The elastic pipe 4 passes through the middle portions of the upper supporting ring 1 and the lower supporting ring 2, and the inner side walls of the upper supporting ring 1 and the lower supporting ring 2 fit the outer side walls of the elastic pipe 4.

[0029] The upper support ring 1 and the lower support ring 2 are arranged concentrically and in parallel, the connecting rod 3 includes an upper end 31 and a lower end 32, each connecting rod 3 is arranged along the circumference of the upper support ring 1 and the lower support ring 2, the side wall of each connecting rod 3 fits the outer wall of the elastic pipe 4, and the upper end 31 is hinged to the upper support ring 1, specifically through a ball hinge, and the lower end 32 is hinged to the lower support ring 2, specifically through a ball hinge.

[0030] When the upper support ring 1 and the lower support ring 2 rotate relative to each other, the upper end portions 31 and the lower end portions 32 will move relative to each other, thereby causing the connecting rods 3 to tilt at a certain angle. As the connecting rods 3 tilt, the side walls of the connecting rods 3 squeeze the outer side walls of the elastic pipe 4, so that the cross section of the elastic pipe 4 forms a continuously changing flow guide cross section.

[0031] The length of the connecting rod 3 is fixed. When the upper supporting ring 1 and the lower supporting ring 2 rotate relatively, the upper supporting ring 1 and the lower supporting ring 2 will move relative to each other in the axial direction, which will affect the stability of the guide device.

[0032] As a preferred embodiment of the present invention:

[0033] The upper supporting ring 1 and the lower supporting ring 2 are provided with limiting devices 5, which can limit the axial distance between the upper supporting ring 1 and the lower supporting ring 2. The connecting rod 3 is a conventional hydraulic telescopic rod that can change its length.

[0034] The axial distance between the upper supporting ring 1 and the lower supporting ring 2 is limited by the limiting device 5, so that the lower supporting ring 2 can rotate smoothly on a fixed horizontal plane, thereby steadily driving the connecting rod 3 to extend and tilt at a certain angle, making the guide device more stable when the cross-section changes.

[0035] The limiting device 5 includes a ring group 51 for limiting the axial movement of the lower support ring 2 and at least two cylindrical brackets 52, and the ring group 51 is fixedly connected to the upper support ring 1 through the cylindrical brackets 52. There are at least two cylindrical brackets 52, which can ensure that the upper support ring 1 and the ring group 51 are stably connected.

[0036] The ring group 51 includes an upper ring 511 and a lower ring 512 respectively arranged above and below the lower support ring 2. The upper ring 511 and the lower ring 512 are both annular structures with a through middle. The cylindrical bracket 52 includes a connecting end 521 and a fixed end 522. The connecting end 521 is fixedly connected to the upper ring 511 and the lower ring 512. The fixed end 522 is fixedly connected to the outer wall of the upper support ring 1. The connecting end 521 is sleeved with a limiting roller 53 between the upper ring 511 and the lower ring 512. The outer side surface 531 of the limiting roller is in contact with the outer side surface 21 of the lower support ring.

[0037] The limiting roller 53 not only prevents the lower support ring 2 from horizontally sliding, but also rotates with the rotation of the lower support ring 2, thereby supporting the lower support ring 2. The inner ring of the bearing of the limiting roller 53 is sleeved on the side wall of the cylindrical bracket 52, and the outer ring of the limiting roller 53 can rotate relative to the cylindrical bracket 52.

[0038] The upper ring 511 and the lower ring 512 are at a certain distance and do not overlap. The limiting roller 53 is placed between the upper ring 511 and the lower ring 512 and does not contact the upper ring 511 and the lower ring 512. Therefore, the upper ring 511 and the lower ring 512 will not affect the rotation of the limiting roller 53.

[0039] The connecting end 521 passes through the lower circular ring 512 , and a base 54 is fixedly provided at the bottom of the connecting end 521 for fixing the entire flow guide device on the path of the elastic pipe 4 . The outer wall of the upper support ring 1 extends outwardly with a limiting block 11 corresponding to each cylindrical bracket 52 , and the fixed end 522 is fixedly connected to the corresponding limiting block 11 .

[0040] The fixed end 522 is preferably fixedly connected to the limit block 11 by welding, so that the structure of the guide device is stable and the upper support ring 1 remains fixed when the lower support ring 2 rotates.

[0041] A handle 6 is protruding outward from the outer side wall of the lower support ring 2, and a handle 6 is arranged between the two cylindrical brackets 52. Preferably, the handle 6 is fixed to the outer side wall of the lower support ring 2 by welding. The top surface of the handle 6 fits the bottom surface of the upper circular ring 511, and the bottom surface of the handle 6 fits the top surface of the lower circular ring 512. The upper circular ring 511 and the lower circular ring 512 clamp the handle 6, and the lower support ring 2 is maintained on the horizontal plane between the upper circular ring 511 and the lower circular ring 512, thereby limiting the displacement of the lower support ring 2 in the circumferential direction, and further limiting the axial distance between the upper support ring 1 and the lower support ring 2.

[0042] As a preferred embodiment of the present invention:

[0043] Three cylindrical brackets 52 are arranged at intervals along the circumference of the upper support ring 1 and the circular ring group 51, and the interval between every two cylindrical brackets 52 is 120 degrees.

[0044] Three cylindrical brackets 52 are fixedly connected to the upper support ring 1 and the circular ring group 51, maintaining the upper support ring 1 on a fixed horizontal plane, and the degrees of freedom of the upper support ring 1 are completely restricted, thereby forming a supporting and fixing system, providing a stable platform for the rotation, extension and tilt of the connecting rod 3.

[0045] The upper supporting ring 1 and the lower supporting ring 2 are connected by 12 connecting rods 3. The connecting rods 3 are connecting rods with a thicker diameter in the upper part and a thinner diameter in the lower part. The upper end 31 is hinged to the upper supporting ring 1 through a ball hinge 7, and the lower end 32 is hinged to the lower supporting ring 2 through a ball hinge 7.

[0046] The upper end 31 is connected to the upper support ring 1 by a larger ball hinge 7, and the lower end 32 is connected to the lower support ring 2 by a smaller ball hinge 7. When not in operation, the connecting rod 3 is in a vertical state. The positions of the ball hinges 7 on the upper end 31 and the lower end 32 correspond one to one.

[0047] Three completely equal handles 6 are welded at equal intervals on the outer wall of the lower supporting ring 2. The handles 6 are restricted from moving up and down by the upper ring 511 and the lower ring 512. Rotating the handles 6 drives the lower supporting ring 2 to rotate, thereby driving the connecting rod 3 to tilt at a certain angle.

[0048] When the flow guide device is in working state, the connecting rod 3 applies external force to the elastic pipe 4, so that the elastic pipe 4 forms a curved surface similar to a saddle shape. At this time, the cross-sectional area of ​​the through holes in the upper and lower parts of the elastic pipe 4 remains unchanged, and the cross-sectional area of ​​the through holes in the middle part is significantly reduced, thereby achieving the purpose of changing the flue gas flow velocity in the elastic channel under low load conditions to prevent ash falling.

[0049] The specific use of the embodiment of the present invention includes the following four steps:

[0050] Step 1: First, fix the guide device of the invention on the flue layout path to ensure that the upper support ring 1 and the lower support ring 2 will not move up and down, and then pass the flexible and highly isolating elastic pipe 4 through the upper support ring 1 and the lower support ring 2, while ensuring that the outer surface of the elastic pipe 4 is in close contact with the connecting rod in the vertical state.

[0051] Step 2: Use external force to rotate any handle 6 counterclockwise (or clockwise). Once the handle 6 is rotated counterclockwise (or clockwise), the rotation direction of the handle 6 must not be changed during the entire process. The handle 6 drives the lower support ring 2 to rotate on the horizontal plane, and then the rotating lower support ring 2 drives the connecting rod 3 to tilt, stretch and rotate.

[0052] Step three, as the rotation angle of the handle 6 increases, the connecting rod 3 gradually squeezes the outer wall of the elastic pipe 4. In the process of the connecting rod 3 squeezing the elastic pipe 4, the elastic pipe 4 undergoes elastic deformation, which is specifically manifested in that the diversion cross-sectional area in the middle of the elastic pipe 4 decreases, while the diversion cross-sectional areas at the positions of the upper support ring 1 and the lower support ring 2 remain unchanged.

[0053] Step 4: When the flow rate meets the working requirements, use external force to fix the handle 6 so that it will not rotate horizontally. For example, use a rope or chain to tie any handle to the two adjacent cylindrical brackets 52, so that the distance between the handle and the two adjacent cylindrical brackets 52 is fixed. If the actual working situation changes suddenly, it is necessary to determine the rotation direction of the handle 6 again according to the actual situation, and then rotate the handle 6 to change the cross-sectional area of ​​the elastic pipe 4, so that the flow rate meets the working requirements, and finally the boiler or sintering machine can ensure the flow rate of flue gas under different loads, so that the flue does not produce ash falling, and the efficiency of the desulfurization device is greatly improved.

[0054] In summary, the variable cross-section flow guide device provided by the embodiment of the present invention can change the cross-section size and thus the airflow velocity by simply turning the handle 6 to drive the connecting rod 3 to stretch, rotate and tilt. The cost is relatively low and the processing difficulty is simple to assemble.

[0055] Based on the saddle surface principle: it is a curved surface, also called a hyperbolic paraboloid, which is similar in shape to a saddle. Figure 7 As shown in the figure, there is a straight line in a horizontal plane that is at a certain angle to the vertical plane. The straight line rotates around the vertical central axis for one circle, and the part swept by the straight line is similar to the shape of a saddle. In actual practice, in order to form such a saddle-like curved surface, the inclined straight line is replaced by twelve symmetrically distributed connecting rods 3, and the external handle 6 is turned to make the lower support ring 2 drive the connecting rod 3 to tilt, stretch and rotate, and the connecting rod 3 squeezes the elastic pipe 4 to form a similar curved surface. Figure 7 The saddle surface shape shown in the figure achieves the desired goal.

[0056] The variable cross-section flow guide device of the present invention is based on the saddle surface. By rotating the handle 6 on the lower support ring 2, the lower support ring 2 is driven to rotate. The rotation of the lower support ring 2 correspondingly drives the connecting rod 3 connected to the lower support ring 2 to tilt, extend and rotate. The connecting rod 3 squeezes the outer wall of the elastic pipe 4, thereby forming a continuously changing flow guide cross-section, so that the boiler or sintering machine can still ensure the flow rate of flue gas under different loads without causing ash falling. Ultimately, the power and energy loss is reduced, and the efficiency of the desulfurization device is greatly improved. In addition, the present flow guide device also has the advantages of simple structure and low manufacturing cost.

[0057] The present invention is not limited to the above-mentioned best implementation mode. Anyone can derive other various forms of variable cross-section flow guide devices based on saddle surfaces under the enlightenment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims

1. A variable cross-section flow guide device based on a saddle surface, characterized in that: It comprises an upper supporting ring, a lower supporting ring and a plurality of connecting rods arranged in a vertical direction, wherein the upper supporting ring and the lower supporting ring are both annular structures with a through middle portion, the upper supporting ring and the lower supporting ring are arranged concentrically and in parallel, the connecting rod comprises an upper end portion and a lower end portion, each of the connecting rods is arranged along the circumference of the upper supporting ring and the lower supporting ring, and the upper end portion is hinged to the upper supporting ring, and the lower end portion is hinged to the lower supporting ring, and the upper supporting ring and the lower supporting ring rotate relative to each other so that the upper end portion and the lower end portion move relative to each other, and then the connecting rod tilts; The upper supporting ring and the lower supporting ring are provided with limiting devices, and the limiting devices can limit the axial distance between the upper supporting ring and the lower supporting ring, and the connecting rod is a hydraulic telescopic rod capable of changing the length; The upper supporting ring and the lower supporting ring are connected by 12 connecting rods, the upper end portion is hinged to the upper supporting ring through a ball hinge, and the lower end portion is hinged to the lower supporting ring through a ball hinge.

2. A variable cross-section flow guide device based on a saddle surface according to claim 1, characterized in that: The limiting device comprises a circular ring group for limiting the axial movement of the lower supporting ring and no less than two cylindrical brackets, and the circular ring group is fixedly connected to the upper supporting ring through the cylindrical brackets.

3. A saddle-surface-based variable cross-section flow guide device according to claim 2, characterized in that: The ring group includes an upper ring and a lower ring respectively arranged above and below the lower support ring, and the upper ring and the lower ring are both annular structures with a through middle portion. The cylindrical bracket includes a connecting end and a fixed end, and the connecting end is fixedly connected to the upper ring and the lower ring. The connecting end is provided with a limiting roller between the upper ring and the lower ring, and the outer side surface of the limiting roller is in contact with the outer side surface of the lower support ring, and the fixed end is fixedly connected to the outer side wall of the upper support ring.

4. The variable cross-section flow guide device based on a saddle surface according to claim 3, characterized in that: The connecting end passes through the lower circular ring, and a base is fixedly provided at the bottom of the connecting end. The outer wall of the upper supporting ring extends outwardly with a limiting block corresponding to each of the cylindrical supports, and the fixed end is fixedly connected to the corresponding limiting block.

5. The variable cross-section flow guide device based on a saddle surface according to claim 2, characterized in that: A handle is protruding outwardly from the outer side wall of the lower supporting ring, and one of the handles is arranged between the two cylindrical brackets.

6. The variable cross-section flow guide device based on a saddle surface according to claim 2, characterized in that: Three cylindrical supports are arranged at intervals along the circumference of the upper support ring and the circular ring group, and the interval between every two cylindrical supports is 120 degrees.

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