A micro drainage pumping station with a vortex elimination and vibration reduction structure

Abstract

A micro drainage pumping station with a vortex elimination and vibration reduction structure according to the present invention has a double-inlet pipe structure for the inlet pipe, which includes a main flow channel pipe and an auxiliary flow channel pipe. The inner diameter of the main flow channel pipe is D1, and the inner diameter of the auxiliary flow channel pipe is D2, where D1 > D2. The main flow channel pipe and the auxiliary flow channel pipe form an inlet guide frustum structure at the bottom connection. The inlet guide frustum structure includes a main flow channel side frustum arc surface and an auxiliary flow channel side frustum arc surface. The contour line of the main flow channel side frustum arc surface is an arc, and its arc radius is the main flow channel guide radius R1. The contour line of the auxiliary flow channel side frustum arc surface is an arc, and its arc radius is the auxiliary flow channel guide radius R2, where R1 < R2. A main flow channel guide structure at the front end and a main flow channel vortex elimination structure at the rear end are provided in the main flow channel pipe. Due to the improvement of the pumping station structure, the flow characteristics are improved, the guide efficiency is enhanced, the vibration and noise are reduced, and the eddy current is reduced and then eliminated.

Description

Technical Field

[0001] The present invention relates to a micro drainage pumping station with a vortex elimination and vibration reduction structure, and in particular to a drainage pumping station that can eliminate vortices and reduce vibrations to ensure the normal, efficient, and safe operation of the water pump. Background Art

[0002] Pumping station projects are hydraulic engineering projects that use pump units and flow-through facilities to transfer and convert energy and achieve water body transportation for the purpose of promoting benefits and avoiding disasters. Pumping station projects are one of the effective engineering measures to solve the three major water resource problems of drought and water shortage, flood disasters, and water environment deterioration. The structure of a pumping station can generally be divided into mechanical and electrical equipment and building facilities. Mechanical and electrical equipment is divided into main equipment and auxiliary facilities. The main equipment is mainly pumps and prime movers (usually motors and diesel engines); auxiliary facilities include equipment for water filling, water supply, drainage, ventilation, compressed air, oil supply, lifting, lighting, and fire protection. Building facilities include intake structures, pump houses, outlet structures, substations, and management houses. At present, the structure and performance of pumps in pumping station projects are still the main research directions of researchers. However, existing pumps generally have low diversion efficiency, large vibrations, high noise, cavitation, and vortices. Therefore, it is particularly important to carry out design and research on improving the characteristics of pumps in pumping stations.

[0003] The prior art CN105508308A discloses a new type of anti-vortex device and method for the pump beam of a pumping station. By setting a new type of pump beam in the intake sump, the flow pattern in the intake sump can be significantly improved. The new type of pump beam will effectively improve the flow pattern in the intake sump, reduce the occurrence of backflow on the back wall of the intake sump, and play a rectifying role. At the same time, it will also reduce the occurrence of vortices around the pump beam and avoid the formation of vortex bands. The present invention is applied to the construction and transformation of pumping stations, which can effectively improve the operation efficiency of pumping stations and improve the cavitation performance of pump devices.

[0004] However, the above-mentioned pumping stations all have limitations in design, poor adaptability, high power consumption, unstable water output, low efficiency, large vibrations, and high noise. Therefore, in view of these problems, the applicant proposes a micro drainage pumping station with a vortex elimination and vibration reduction structure to solve the above-mentioned problems to improve the flow characteristics, enhance the diversion efficiency, reduce vibration and noise, and reduce and eliminate vortices. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art and propose a micro drainage pumping station with a vortex elimination and vibration reduction structure.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A micro drainage pumping station with a vortex elimination and vibration reduction structure, including a pump house. The motor and the drain pipe are installed in the pump house through a support structure and a pipe base. The motor is connected to the pump shaft through a coupling. The bottoms of the support structure and the pipe base are both fixed on one side of a horizontal bottom plate, and a fixed plate is fixed on the other side of the horizontal bottom plate. The fixed plate is successively connected with a hydraulic cylinder and a support plate to form an adjustment in the longitudinal direction of the drain pipe. It also includes a water inlet pipe. It is characterized in that: the water inlet pipe is a double water inlet pipe structure, which includes a main flow channel pipe and an auxiliary flow channel pipe. The inner diameter of the main flow channel pipe is D1, and the inner diameter of the auxiliary flow channel pipe is D2, where D1 > D2. The main flow channel pipe and the auxiliary flow channel pipe form an inlet guide cone structure at the bottom connection. The inlet guide cone structure includes a main flow channel side cone arc surface and an auxiliary flow channel side cone arc surface. The contour line of the main flow channel side cone arc surface is an arc, and its arc radius is the main flow channel guide radius R1. The contour line of the auxiliary flow channel side cone arc surface is an arc, and its arc radius is the auxiliary flow channel guide radius R2, where R1 < R2. A main flow channel guide structure at the front end and a main flow channel vortex elimination structure at the rear end are arranged in the main flow channel pipe. The main flow channel guide structure includes a main flow channel inlet groove and a main flow channel inlet guide vane on the inner wall side of the main flow channel pipe. The contour line of the main flow channel inlet guide vane is triangular, and its bottom end is fixedly installed in the main flow channel inlet groove. The main flow channel vortex elimination structure at the rear end includes a triangular vortex elimination structure and a rectangular vortex elimination structure arranged at intervals along the inner wall of the main flow channel pipe. An inlet drainage pipe connected to the inlet side and an outlet drainage pipe connected to the impeller outlet side are internally connected to the triangular vortex elimination structure and the rectangular vortex elimination structure through a vortex elimination distribution pipe. Triangular jet holes and rectangular jet holes are respectively arranged at the top ends of the inner sides of the flow channels of the triangular vortex elimination structure and the rectangular vortex elimination structure. An auxiliary flow channel pressurization structure is arranged in the auxiliary flow channel pipe. The auxiliary flow channel pressurization structure includes a pressurization motor. The two ends of the pressurization motor are equipped with a first pressurization impeller and a second pressurization impeller. The pressurization motor is installed inside the auxiliary flow channel pipe through a support guide plate. A wire groove is arranged in the support guide plate. A guide vane group is arranged on one side of the support guide plate. The guide vane group includes an annular arm guide vane on the inner wall side of the auxiliary flow channel pipe and a motor guide vane outside the pressurization motor. Both the annular arm guide vane and the motor guide vane are twisted guide vanes and have the same structure.

[0008] Further, the inlet radius of the impeller is R, and R1 = (1.1 - 1.2)R.

[0009] Further, the inlet radius of the impeller is R, and R2 = (1.3 - 1.5)R.

[0010] Further, the inlet radius of the impeller is R, and the top surface circle radius of the inlet guide cone structure is R3, where R3 = (0.2 - 0.3)R.

[0011] Further, the jet directions of the triangular jet holes and the rectangular jet holes are not along the flow channel center direction.

[0012] Further, D1 = (1.5 - 1.8)D2.

[0013] Further, the impeller radii of the first supercharging impeller and the second supercharging impeller are not equal.

[0014] Further, the hydraulic cylinder 8 adopts a swing hydraulic cylinder.

[0015] Further, it further includes a pump outlet guide vane, and the pump outlet guide vane is composed of an arc-shaped outlet guide vane and a conical outlet guide vane.

[0016] Further, the arc-shaped outlet guide vane and the conical outlet guide vane are uniformly distributed along the circumference on the inner wall of the drain pipe. The arc-shaped outlet guide vane and the conical outlet guide vane are axisymmetric structures. The flow-through side surface of the arc-shaped outlet guide vane is an arc surface, and the flow-through side surface of the conical outlet guide vane is a conical surface.

[0017] A micro drainage pumping station with a vortex elimination and vibration reduction structure according to the present invention, the inlet pipe is a double-inlet pipe structure, which includes a main flow channel pipe and an auxiliary flow channel pipe. The inner diameter of the main flow channel pipe is D1, and the inner diameter of the auxiliary flow channel pipe is D2, D1 > D2; the main flow channel pipe and the auxiliary flow channel pipe form an inlet guide cone structure at the bottom connection. The inlet guide cone structure includes a main flow channel side cone arc surface and an auxiliary flow channel side cone arc surface. The contour line of the main flow channel side cone arc surface is an arc, and its arc radius is the main flow channel guide radius R1. The contour line of the auxiliary flow channel side cone arc surface is an arc, and its arc radius is the auxiliary flow channel guide radius R2, where R1 < R2; a front-end main flow channel guiding structure and a rear-end main flow channel vortex elimination structure are arranged in the main flow channel pipe. The main flow channel guiding structure includes a main flow channel inlet groove and a main flow channel inlet guide vane located on the inner wall side of the main flow channel pipe. The contour line of the main flow channel inlet guide vane is triangular, and its bottom end is fixedly installed in the main flow channel inlet groove; the rear-end main flow channel vortex elimination structure includes a triangular vortex elimination structure and a rectangular vortex elimination structure arranged at intervals along the inner wall of the main flow channel pipe. The inlet drainage pipe connected to the inlet side and the outlet drainage pipe connected to the impeller outlet side are internally connected to the triangular vortex elimination structure and the rectangular vortex elimination structure through a vortex elimination distribution pipe. Triangular jet holes and rectangular jet holes are respectively arranged at the top ends of the inner sides of the flow channels of the triangular vortex elimination structure and the rectangular vortex elimination structure; an auxiliary flow channel supercharging structure is arranged in the auxiliary flow channel pipe. The auxiliary flow channel supercharging structure includes a supercharging motor. The first supercharging impeller and the second supercharging impeller are installed at both ends of the supercharging motor. The supercharging motor is installed on the inner side of the auxiliary flow channel pipe through a support guide plate. A wire groove is arranged in the support guide plate. A guide vane group is arranged on one side of the support guide plate. The guide vane group includes an annular arm guide vane located on the inner wall side of the auxiliary flow channel pipe and a motor guide vane located outside the supercharging motor. Both the annular arm guide vane and the motor guide vane are twisted guide vanes and have the same structure. Due to the improvement of the pumping station structure, the flow characteristics are improved, the guiding efficiency is enhanced, the vibration and noise are reduced, and the eddy current is reduced and then eliminated. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of a micro drainage pumping station;

[0019] Figure 2 It is a structural schematic diagram of the inlet pipe;

[0020] Figure 3 It is a cross-sectional schematic diagram of the vortex elimination structure of the main flow channel;

[0021] Figure 4 It is a cross-sectional schematic diagram of the pressure boosting structure of the auxiliary flow channel;

[0022] Figure 5 It is a structural schematic diagram of the guide vane at the pump outlet.

[0023] In the figure: pump house 1, motor 2, coupling 3, pump shaft 4, inlet pipe 5, inlet groove 51 of the main flow channel, inlet guide vane 52 of the main flow channel, main flow channel pipe 53, auxiliary flow channel pipe 54, drain pipe 6, support plate 7, hydraulic cylinder 8, fixing plate 9, horizontal bottom plate 10, support structure 11, pipe base 12, vortex elimination structure 13 of the main flow channel, triangular vortex elimination structure 131, rectangular vortex elimination structure 132, inlet drainage pipe 133, outlet drainage pipe 134, vortex elimination distribution pipe 135, triangular jet hole 136, rectangular jet hole 137, pressure boosting structure 14 of the auxiliary flow channel, boosting motor 141, first boosting impeller 142, second boosting impeller 143, support guide plate 144, guide vane group 145, ring arm guide vane 146, motor guide vane 147, wire groove 148, pump outlet guide vane 15, arc-shaped outlet guide vane 151, conical outlet guide vane 152, inlet guide cone structure 16, arc surface of the main flow channel side round platform 17, arc surface of the auxiliary flow channel side round platform 18, inner diameter D1 of the main flow channel pipe 53, inner diameter D2 of the auxiliary flow channel pipe 54, inlet radius R of the impeller, main flow channel diversion radius R1, auxiliary flow channel diversion radius R2, top surface round radius R3 of the inlet guide cone structure 16. Specific embodiments

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] As Figures 1-5As shown in the figure, a micro drainage pumping station with a vortex elimination and vibration reduction structure includes a pump house 1. The motor 2 and the drain pipe 6 are installed in the pump house 1 through a support structure 11 and a pipe base 12. The motor 2 is connected to the pump shaft 4 through a coupling 3. The bottom ends of the support structure 11 and the pipe base 12 are both fixed on one side of a horizontal bottom plate 10. On the other side of the horizontal bottom plate 10, a fixed plate 9 is fixed. The fixed plate 9 is sequentially connected with a hydraulic cylinder 8 and a support plate 7 to form an adjustment in the longitudinal direction of the drain pipe 6. It also includes a water inlet pipe 5. It is characterized in that: the water inlet pipe 5 is a double water inlet pipe structure. The use of a double water inlet pipe structure can better stabilize the flow pattern of the inlet water flow. It includes a main flow channel pipe 53 and an auxiliary flow channel pipe 54. The inner diameter of the main flow channel pipe 53 is D1, and the inner diameter of the auxiliary flow channel pipe 54 is D2, where D1 > D2. The smaller inner diameter of the auxiliary flow channel pipe 54 mainly plays the role of supplementing the flow rate and increasing the pressure. At the bottom connection of the main flow channel pipe 53 and the auxiliary flow channel pipe 54, an inlet diversion frustum structure 16 is formed. Compared with the existing diversion cone structure, etc., the inlet diversion frustum structure 16 can make the two-side flow paths premix in advance and produce a pressure stabilizing effect. The inlet diversion frustum structure 16 includes a main flow channel side frustum arc surface 17 and an auxiliary flow channel side frustum arc surface 18. The contour line of the main flow channel side frustum arc surface 17 is an arc, and its arc radius is the main flow channel diversion radius R1. The contour line of the auxiliary flow channel side frustum arc surface 18 is an arc, and its arc radius is the auxiliary flow channel diversion radius R2, where R1 < R2. A larger radius of the auxiliary flow channel diversion radius R2 is beneficial to the generation of the pressure increasing effect. In the main flow channel pipe 53, a front main flow channel diversion structure and a rear main flow channel vortex elimination structure 13 are provided. The main flow channel diversion structure includes a main flow channel inlet groove 51 and a main flow channel inlet guide vane 52 on the inner wall side of the main flow channel pipe 53. The contour line of the main flow channel inlet guide vane 52 is triangular, and its bottom end is fixedly installed in the main flow channel inlet groove 51. The main flow channel inlet groove 51 is beneficial to buffering the inlet water flow, and the main flow channel inlet guide vane 52 can better rectify the inlet water flow and reduce the generation of eddy currents. The rear main flow channel vortex elimination structure 13 includes a triangular vortex elimination structure 131 and a rectangular vortex elimination structure 132 that are sequentially arranged at intervals along the inner wall of the main flow channel pipe 53. An inlet drainage pipe 133 connected to the inlet side and an outlet drainage pipe 134 connected to the impeller outlet side are internally connected to the triangular vortex elimination structure 131 and the rectangular vortex elimination structure 132 through a vortex elimination distribution pipe 135. Triangular jet holes 136 and rectangular jet holes 137 are respectively arranged at the inner top ends of the flow channels of the triangular vortex elimination structure 131 and the rectangular vortex elimination structure 132. By means of the water inlet and outlet structures, the vortex elimination, noise reduction, and vibration reduction of the inlet water flow path are realized, which is beneficial to improving the water conveyance efficiency.There is an auxiliary runner pressure boosting structure 14 arranged in the auxiliary runner pipeline 54. The auxiliary runner pressure boosting structure 14 includes a boosting motor 141. A first boosting impeller 142 and a second boosting impeller 143 are installed at both ends of the boosting motor 141. The boosting motor 141 is installed on the inner side of the auxiliary runner pipeline 54 through a support guide plate 144. A wire groove 148 is arranged in the support guide plate 144. A guide vane group 145 is arranged on one side of the support guide plate 144. The guide vane group 145 includes an annular arm guide vane 146 located on the inner wall side of the auxiliary runner pipeline 54 and a motor guide vane 147 located outside the boosting motor 141. Both the annular arm guide vane 146 and the motor guide vane 147 are twisted guide vanes and have the same structure. The auxiliary flow channel adopts an impeller boosting structure, further realizing the vortex elimination, noise reduction, and vibration reduction of the incoming water flow path, which is beneficial to improving the water conveyance efficiency.

[0027] Further, the inlet radius of the impeller is R, and R1 = (1.1 - 1.2)R.

[0028] Further, the inlet radius of the impeller is R, and R2 = (1.3 - 1.5)R.

[0029] Further, the inlet radius of the impeller is R, the top surface circle radius of the inlet guide conical frustum structure 16 is R3, and R3 = (0.2 - 0.3)R.

[0030] Further, the jet directions of the triangular jet holes 136 and the rectangular jet holes 137 are not along the flow channel center direction. Oblique jet can increase the premixing range and reduce eddy currents more effectively.

[0031] Further, D1 = (1.5 - 1.8)D2.

[0032] Further, the impeller radii of the first boosting impeller 142 and the second boosting impeller 143 are not equal. The non-equal diameter design effectively increases the mixed flow range and pressure.

[0033] Further, the hydraulic cylinder 8 adopts a swing type hydraulic cylinder.

[0034] Further, it further includes a pump outlet guide vane 15. The pump outlet guide vane 15 is composed of an arc surface outlet guide vane 151 and a conical surface outlet guide vane 152.

[0035] Further, the arc surface outlet guide vane 151 and the conical surface outlet guide vane 152 are evenly distributed along the circumference on the inner wall of the drain pipe 6. The arc surface outlet guide vane 151 and the conical surface outlet guide vane 152 are axisymmetric structures. The flow-through side surface of the arc surface outlet guide vane 151 is an arc surface, and the flow-through side surface of the conical surface outlet guide vane 152 is a conical surface. The combined use of the arc surface and the conical surface is more beneficial to the pressure boosting of the water flow and improves the conveying efficiency.

[0036] A micro drainage pumping station with a vortex elimination and vibration reduction structure according to the present invention has a double-inlet pipe structure for the inlet pipe, which includes a main flow channel pipe and an auxiliary flow channel pipe. The inner diameter of the main flow channel pipe is D1, and the inner diameter of the auxiliary flow channel pipe is D2, where D1 > D2. The main flow channel pipe and the auxiliary flow channel pipe form an inlet guide frustum structure at the bottom connection. The inlet guide frustum structure includes a main flow channel side frustum arc surface and an auxiliary flow channel side frustum arc surface. The contour line of the main flow channel side frustum arc surface is an arc, and its arc radius is the main flow channel guide radius R1. The contour line of the auxiliary flow channel side frustum arc surface is an arc, and its arc radius is the auxiliary flow channel guide radius R2, where R1

Claims

1. A micro-drainage pump station with a vortex elimination and vibration reduction structure, comprising a pump room (1), a motor (2) and a drainage pipe (6) installed in the pump room (1) through a support structure (11) and a pipe base (12), the motor (2) being connected to a pump shaft (4) through a coupling (3), the bottom ends of the support structure (11) and the pipe base (12) being fixed to one side of a horizontal bottom plate (10), a fixing plate (9) being fixed to the other side of the horizontal bottom plate (10), the fixing plate (9) being connected in sequence to a hydraulic cylinder (8) and a support plate (7) to form a longitudinal direction adjustment for the drainage pipe (6); and also comprising a water inlet pipe (5); characterized in that: The water inlet pipe (5) has a double water inlet pipe structure, which includes a main flow channel pipe (53) and an auxiliary flow channel pipe (54). The inner diameter of the main flow channel pipe (53) is D1, and the inner diameter of the auxiliary flow channel pipe (54) is D2, where D1 > D2. The main flow channel pipe (53) and the auxiliary flow channel pipe (54) form an inlet diversion frustum structure (16) at the bottom connection. The inlet diversion frustum structure (16) includes a main flow channel side frustum arc surface (17) and an auxiliary flow channel side frustum arc surface (18). The contour line of the main flow channel side frustum arc surface (17) is an arc, and its arc radius is the main flow channel diversion radius R1. The contour line of the auxiliary flow channel side frustum arc surface (18) is an arc, and its arc radius is the auxiliary flow channel diversion radius R2, where R1 < R2. A main flow channel diversion structure at the front end and a main flow channel vortex elimination structure (13) at the rear end are arranged in the main flow channel pipe (53). The main flow channel diversion structure includes a main flow channel inlet groove (51) and a main flow channel inlet guide vane (52) located on the inner wall side of the main flow channel pipe (53). The contour line of the main flow channel inlet guide vane (52) is triangular, and its bottom end is fixedly installed in the main flow channel inlet groove (51). The main flow channel vortex elimination structure (13) at the rear end includes a triangular vortex elimination structure (131) and a rectangular vortex elimination structure (132) arranged at intervals along the inner wall of the main flow channel pipe (53). An inlet drainage pipe (133) connected to the inlet side and an outlet drainage pipe (134) connected to the impeller outlet side are internally connected to the triangular vortex elimination structure (131) and the rectangular vortex elimination structure (132) through a vortex elimination distribution pipe (135). Triangular jet holes (136) and rectangular jet holes (137) are respectively arranged at the top ends of the inner sides of the flow channels of the triangular vortex elimination structure (131) and the rectangular vortex elimination structure (132). An auxiliary flow channel pressurization structure (14) is arranged in the auxiliary flow channel pipe (54). The auxiliary flow channel pressurization structure (14) includes a pressurization motor (141). A first pressurization impeller (142) and a second pressurization impeller (143) are installed at both ends of the pressurization motor (141). The pressurization motor (141) is installed on the inner side of the auxiliary flow channel pipe (54) through a support guide plate (144). A wire groove (148) is arranged in the support guide plate (144). A guide vane group (145) is arranged on one side of the support guide plate (144). The guide vane group (145) includes an annular arm guide vane (146) located on the inner wall side of the auxiliary flow channel pipe (54) and a motor guide vane (147) located outside the pressurization motor (141). Both the annular arm guide vane (146) and the motor guide vane (147) are twisted guide vanes and have the same structure. It also includes a pump outlet guide vane (15), and the pump outlet guide vane (15) is composed of an arc surface outlet guide vane (151) and a conical surface outlet guide vane (152). The arc surface outlet guide vane (151) and the conical surface outlet guide vane (152) are evenly distributed along the circumference on the inner wall of the drain pipe (6). The arc surface outlet guide vane (151) and the conical surface outlet guide vane (152) are axisymmetric structures. The flow-through side surface of the arc surface outlet guide vane (151) is an arc surface, and the flow-through side surface of the conical surface outlet guide vane (152) is a conical surface.

2. A micro-drainage pump station with a vortex elimination and vibration reduction structure as claimed in claim 1, characterized in that: The inlet radius of the impeller is R, R1 = (1.1~1.2)R.

3. A micro-drainage pump station with a vortex elimination and vibration reduction structure as claimed in claim 1, characterized in that: The inlet radius of the impeller is R, R2 = (1.3~1.5)R.

4. A micro-drainage pump station with a vortex elimination and vibration reduction structure as claimed in claim 1, characterized in that: The inlet radius of the impeller is R, and the top surface radius of the inlet guide cone structure (16) is R3, where R3 = (0.2-0.3)R.

5. The micro-drainage pump station with vortex elimination and vibration reduction structure according to claim 1, characterized in that: The jet directions of the triangular jet hole (136) and the rectangular jet hole (137) are not along the central direction of the flow channel.

6. The micro-drainage pump station with vortex elimination and vibration reduction structure according to claim 1, characterized in that: D1 = (1.5 ~ 1.8) D2.

7. The micro-drainage pump station with vortex elimination and vibration reduction structure according to claim 1, characterized in that: The impeller radii of the first boost impeller (142) and the second boost impeller (143) are not equal.

8. The micro-drainage pump station with vortex elimination and vibration reduction structure according to claim 1, characterized in that: The hydraulic cylinder (8) is a swing type hydraulic cylinder.

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