A bionic special-shaped diversion pier device and its use method

Abstract

The present invention relates to a special-shaped guide pier device and a method for using the same, comprising a special-shaped guide pier, assuming R is 50-100 cm; the front portion of the special-shaped guide pier is a semicircle with a radius of R, the front portion of the special-shaped guide pier is an arc shape that gradually decreases from the middle to the upper and lower parts, and the rear portion is a gradually decreasing streamlined ellipse; the height of the special-shaped guide pier is 6.5R, and the horizontal median length of the special-shaped guide pier is 4.5R; the upper and lower end sections of the special-shaped guide pier are both teardrop-shaped, and the semicircular diameter of the front portion of the upper end section of the special-shaped guide pier is 0.2R; a plurality of guide holes are provided in front of the vertical median axis of the special-shaped guide pier, and the water inlet of the guide hole is located on the vertical median axis at the front of the special-shaped guide pier; the present invention optimizes the shape of the traditional guide pier, and the front portion of the guide pier is an arc shape that gradually decreases from the middle to the upper and lower parts, so as to facilitate vortex elimination and rectification in the middle part of the flow channel, while reducing the impact on the relatively stable flow state of the surrounding parts, so as to reduce hydraulic loss.

Description

Technical Field

[0001] The invention relates to a bionic special-shaped diversion pier device and a use method thereof, belonging to the technical field of water conservancy engineering and municipal engineering. Background Art

[0002] The inlet and outlet flow channels of a bulb-type tubular pump are straight, and the overall flow channel efficiency is high. However, the presence of the bulb body makes the flow pattern within the outlet flow channel of the bulb-type tubular pump device complex. First, due to the influence of the guide vane outlet circulation and the bulb body, the influence of the guide vane outlet circulation is the most significant, resulting in a large range of flow separation and vortices within the outlet flow channel of the bulb-type tubular pump device. Second, the bulb body occupies the water flow channel within the outlet flow channel, and the water flow velocity in the bulb body section of the outlet flow channel varies dramatically. Vortices and deviations exist in the tail area of ​​the bulb body, and this section is where the hydraulic losses are most severe. To further improve the efficiency of the bulb-type tubular pump device, it is urgent to improve the flow pattern within the outlet flow channel of the bulb-type tubular pump device. Summary of the Invention

[0003] The purpose of the present invention is to provide a bionic special-shaped guide pier device and a method of using the same in order to address the deficiencies of the prior art.

[0004] The object of the present invention is achieved by providing a bionic special-shaped guide pier device, characterized in that: it includes a special-shaped guide pier, assuming R is 50-100 cm; the front portion of the special-shaped guide pier is a semicircle with a radius of R, the front portion of the special-shaped guide pier is an arc shape that gradually decreases from the middle to the upper and lower sides, and the rear portion is a streamlined ellipse shape that gradually decreases; the horizontal center axis length of the special-shaped guide pier is 4.5R;

[0005] The upper and lower cross sections of the special-shaped guide pier are both teardrop-shaped, and the diameter of the front semicircle of the upper cross section of the special-shaped guide pier is 0.2R;

[0006] A plurality of diversion holes are provided on the front of the vertical central axis of the special-shaped diversion pier. The water inlet of the diversion hole is located on the vertical central axis at the front of the special-shaped diversion pier. The water outlet of the diversion hole is located on both sides of the special-shaped diversion pier. Each diversion hole has one water inlet and two water outlets. The plurality of diversion holes are arranged in sequence from the center of the vertical central axis to the upper and lower ends. The interval between two adjacent diversion holes is 0.6R. The water inlet radius of the diversion hole is 0.2R, and the water outlet radius is 0.1R.

[0007] Each diversion hole has two diversion hole flow channels. Each diversion hole flow channel consists of a circular arc with a front radius of 1.2R where the water inlet is set and a circular arc with a rear radius of 1.4R where the water outlet is set. The middle connection is a smooth curve.

[0008] The overall appearance of the special-shaped guide pier is similar to a pomfret.

[0009] The number of the guide holes is 7.

[0010] A method for using a special-shaped diversion pier device comprises the following steps:

[0011] S1. Install the bulb tubular pump; install and secure the bulb body in the bulb tubular pump. The bulb body includes a central cylindrical body and a tail frustum. The bulb tubular pump has a water inlet and a water outlet at both ends. An impeller is installed at the water inlet of the bulb tubular pump. Front and rear fixed guide vanes are installed on the inner wall of the bulb tubular pump.

[0012] The rear fixed guide vane faces the impeller at the water inlet of the bulb tubular pump, and the impeller is located between the front fixed guide vane and the rear fixed guide vane. The rear fixed guide vane faces the central cylindrical body of the bulb body, and the tail frustum of the bulb body faces the water outlet of the bulb tubular pump. The bulb tubular pump is obtained.

[0013] S2. Install the bulb tubular pump in the water flow pipe, with the water inlet of the bulb tubular pump facing the water inlet channel of the water flow pipe and the water outlet of the bulb tubular pump facing the water outlet channel of the water flow pipe;

[0014] During the construction of the outlet channel, a special-shaped guide pier is cast in the outlet channel simultaneously, with the front of the special-shaped guide pier facing the tail cone and the rear of the special-shaped guide pier facing the outlet of the outlet channel; the height of the special-shaped guide pier is L, where L is the height of the outlet channel;

[0015] S3. Start the bulb tubular pump, the impeller rotates, and water flows from the water inlet channel, passes through the front fixed guide vanes, the impeller, and the rear fixed guide vanes, and then flows through the middle cylinder, the tail frustum, and the special-shaped guide pier in sequence before being discharged from the water outlet channel; part of the water flows in from the water inlet on the guide hole in the front direction of the special-shaped guide pier, and flows out from the water outlet on the guide holes on both sides of the special-shaped guide pier;

[0016] Since the front part of the special-shaped guide pier is an arc shape that gradually decreases from the middle to the top and bottom, it is convenient to eliminate vortex and rectify the middle part of the outlet flow channel, and at the same time reduce the impact on the relatively stable flow parts around it, so as to reduce hydraulic loss. The rear part of the special-shaped guide pier is an ellipse that gradually decreases. The horizontal central axis of the special-shaped guide pier is the longest, so as to improve the turbulent water flow in the center of the flow channel, and gradually becomes shorter from the horizontal central axis to the top and bottom, so as to reduce the impact on the relatively stable flow water area; the special-shaped guide pier with a streamlined horizontal section is used to smooth the unfavorable flow state behind the bulb body, reduce hydraulic loss, and at the same time the diversion holes on the vertical section further smooth the water flow, while reducing the impact of the water flow on the special-shaped guide pier, reducing hydraulic loss, and improving the efficiency of the bulb cross-flow pump device.

[0017] This advanced and scientific method addresses the technical problem of widespread flow separation and vortexes within the outlet flow path of bulb tubular pumps. These are primarily influenced by the flow rate at the guide vane outlet and the bulb itself, with the latter having a more pronounced influence. Flow in the bulb section of the outlet flow path is highly uneven, with vortices and biased flow occurring in the tail region of the bulb, where hydraulic losses are most severe.

[0018] The present invention provides a special-shaped guide pier behind the bulb body of a bulb-type tubular pump device. The overall shape of the guide pier is a bionic pomfret-like shape, with a central portion for vortex elimination and rectification, and gradually tapering at the upper and lower ends to reduce the impact on smooth water flow. The horizontal mid-axis surface of the guide pier is teardrop-shaped, with a semicircular front portion to improve the flow pattern and eliminate vortices. The rear portion has a gradually tapering streamlined cross-section to guide the water flow and avoid undesirable flow patterns such as vortices behind the guide pier. A guide hole is provided on the vertical mid-axis surface in front of the guide pier to reduce the impact of the water flow on the guide pier and alleviate the loss of the guide pier. At the same time, the internal flow channel is used to smooth the water flow, further improving the efficiency of the tubular pump.

[0019] Beneficial effects: The present invention optimizes the shape of the traditional diversion pier. The front part of the diversion pier is an arc shape that gradually decreases from the middle to the top and bottom, which is convenient for eliminating vortexes and rectifying the middle part of the flow channel, while reducing the impact on the relatively stable flow parts around it, so as to reduce hydraulic losses. The rear part of the diversion pier is an ellipse with gradually decreasing proportions. The horizontal central axis of the diversion pier is the longest, so as to improve the turbulent water flow in the center of the flow channel, and gradually shortens from the horizontal central axis to the top and bottom, so as to reduce the impact on the relatively stable flow area. The diversion pier with a streamlined horizontal section can smooth the unfavorable flow behind the bulb body and reduce hydraulic losses. At the same time, the diversion holes on the vertical section further smooth the water flow, while reducing the impact of the water flow on the diversion pier, thereby improving the efficiency of the bulb cross-flow pump device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a side view of a bulb tubular pump without the special-shaped guide pier of the present invention installed;

[0021] Figure 2 This is a side view of the special-shaped guide pier of the present invention installed in the bulb tubular pump;

[0022] Figure 3 This is a top view of the special-shaped diversion pier of the present invention;

[0023] Figure 4 This is a front view of the special-shaped diversion pier of the present invention;

[0024] Figure 5 This is a side view of the special-shaped diversion pier of the present invention;

[0025] Figure 6 This is an axial cross-sectional dimension diagram of the special-shaped guide pier of the present invention;

[0026] In the figure: 1 water inlet channel, 2 impeller, 3-1 front guide vane, 3-2 rear guide vane, 4 bulb body, 4-1 middle cylinder, 4-2 tail frustum, 5 water outlet channel, 6 special-shaped guide pier, 7 guide hole, 7-1 water inlet, 7-2 water outlet, 7-3 guide hole channel. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to specific embodiments.

[0028] A bionic special-shaped guide pier device includes a special-shaped guide pier, wherein R is 50-100 cm; the front portion of the special-shaped guide pier is a semicircle with a radius of R, the front portion of the special-shaped guide pier 6 is an arc shape that gradually decreases from the middle to the upper and lower sides, and the rear portion is a streamlined ellipse shape that gradually decreases; the height of the special-shaped guide pier 6 is 6.5R, and the horizontal center axis length of the special-shaped guide pier 6 is 4.5R;

[0029] The upper and lower cross sections of the special-shaped guide pier 6 are both teardrop-shaped, and the diameter of the front semicircle of the upper cross section of the special-shaped guide pier 6 is 0.2R.

[0030] A plurality of diversion holes 7 are provided on the front of the vertical central axis of the special-shaped diversion pier 6. The water inlet 7-1 of the diversion hole 7 is located on the vertical central axis at the front of the special-shaped diversion pier 6. The water outlet 7-2 of the diversion hole 7 is located on both sides of the special-shaped diversion pier 6. Each diversion hole 2 has one water inlet 7-1 and two water outlets 7-2. The plurality of diversion holes 2 are arranged in sequence from the center of the vertical central axis to the upper and lower ends. The interval between two adjacent diversion holes 2 is 0.6R. The radius of the water inlet 7-1 of the diversion hole 2 is 0.2R, and the radius of the water outlet 7-2 is 0.1R.

[0031] Each diversion hole 2 has two diversion hole flow channels 7-3, and each diversion hole flow channel 7-3 is composed of a circular arc with a front radius of 1.2R where the water inlet 7-1 is set and a circular arc with a rear radius of 1.4R where the water outlet 7-2 is set, and the middle connection is a smooth curve.

[0032] The overall appearance of the special-shaped guide pier is similar to a pomfret.

[0033] The number of the guide holes 2 is 7.

[0034] When used, the following steps are included:

[0035] S1. Install the bulb tubular pump; install and secure the bulb body 4 in the bulb tubular pump. The bulb body 4 includes a central cylindrical body 4-1 and a tail frustum body 4-2. The bulb tubular pump has a water inlet and a water outlet at both ends. The water inlet of the bulb tubular pump is equipped with an impeller 2. The inner wall of the bulb tubular pump is equipped with a front fixed guide vane 3-1 and a rear fixed guide vane 3-2.

[0036] The rear fixed guide vane 3-2 faces the impeller 2 at the water inlet of the bulb tubular pump, and the impeller 2 is located between the front fixed guide vane 3-1 and the rear fixed guide vane 3-2. The rear fixed guide vane 3-2 faces the middle cylindrical body 4-1 of the bulb body 4, and the tail frustum 4-2 of the bulb body 4 faces the water outlet of the bulb tubular pump; thus, a bulb tubular pump is obtained.

[0037] S2. Install the bulb tubular pump in the water flow pipeline, with the water inlet of the bulb tubular pump facing the water inlet channel 1 of the water flow pipeline and the water outlet of the bulb tubular pump facing the water outlet channel 5 of the water flow pipeline;

[0038] During the construction of the outlet channel 5, a special-shaped guide pier 6 is cast in the outlet channel 5 simultaneously, with the front of the special-shaped guide pier facing the tail frustum 4-2 and the rear of the special-shaped guide pier facing the outlet of the outlet channel 5; the height of the special-shaped guide pier 6 is L, where L is the height of the outlet channel 5;

[0039] S3. Start the bulb tubular pump, and the impeller 2 rotates. Water flows from the water inlet channel 1, passes through the front fixed guide vane 3-1, the impeller 2, and the rear fixed guide vane 3-2, and then flows through the middle cylinder 4-1, the tail frustum 4-2, and the special-shaped guide pier 6 in sequence before being discharged from the water outlet channel 5. Part of the water flows in from the water inlet 7-1 on the guide hole 2 in the front direction of the special-shaped guide pier 6, and flows out from the water outlet 7-2 on the guide hole 2 on both sides of the special-shaped guide pier 6.

[0040] Since the front part of the special-shaped guide pier 6 is an arc shape that gradually decreases from the middle to the upper and lower parts, it is convenient to eliminate vortexes and rectify the middle part of the outlet flow channel 5, and at the same time reduce the impact on the relatively stable flow parts around it, so as to reduce hydraulic losses. The rear part of the special-shaped guide pier 6 is an ellipse that gradually decreases. The horizontal central axis of the special-shaped guide pier is the longest, so as to improve the turbulent water flow in the center of the flow channel, and gradually becomes shorter from the horizontal central axis to the upper and lower parts, so as to reduce the impact on the relatively stable flow water area; the special-shaped guide pier with a streamlined horizontal section is used to smooth the unfavorable flow state behind the bulb body, reduce hydraulic losses, and at the same time, the diversion hole 2 on the vertical section further smoothes the water flow, while reducing the impact of the water flow on the special-shaped guide pier, reducing hydraulic losses, and improving the efficiency of the bulb cross-flow pump device.

Claims

1. A bionic special-shaped guide pier device, characterized by: The invention comprises a special-shaped guide pier (6), wherein the front portion of the special-shaped guide pier is a semicircle with a radius of R, R being 50-100 cm, the front portion of the special-shaped guide pier (6) is an arc shape that gradually decreases from the middle to the top and bottom, and the rear portion is a streamlined ellipse shape that gradually decreases; the horizontal center axis length of the special-shaped guide pier (6) is 4.5R; The upper and lower cross sections of the special-shaped guide pier (6) are both teardrop-shaped, and the diameter of the front semicircle of the upper cross section of the special-shaped guide pier (6) is 0.2R; A plurality of diversion holes (7) are provided on the front of the vertical center axis of the special-shaped diversion pier (6), the water inlet (7-1) of the diversion hole (7) is located on the vertical center axis at the front of the special-shaped diversion pier (6), and the water outlet (7-2) of the diversion hole (7) is located on both sides of the special-shaped diversion pier (6), and each diversion hole (7) has one water inlet (7-1) and two water outlets (7-2); the plurality of diversion holes (7) are arranged in sequence from the center of the vertical center axis to the upper and lower ends, and the interval between two adjacent diversion holes (7) is 0.6R, the radius of the water inlet (7-1) of the diversion hole (7) is 0.2R, and the radius of the water outlet (7-2) is 0.1R; Each diversion hole (7) has two diversion hole flow channels (7-3), and each diversion hole flow channel (7-3) is composed of a circular arc with a front radius of 1.2R where the water inlet (7-1) is set and a circular arc with a rear radius of 1.4R where the water outlet (7-2) is set, and the middle connection is a smooth curve.

2. The bionic special-shaped guide pier device according to claim 1, characterized in that: The number of the guide holes (7) is 7.

3. A method for using the bionic special-shaped guide pier device according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Install the bulb tubular pump; install and fix the bulb body (4) in the bulb tubular pump, the bulb body (4) comprising a central cylindrical body (4-1) and a tail frustum body (4-2), a water inlet and a water outlet are respectively provided at both ends of the bulb tubular pump, an impeller (2) is installed at the water inlet of the bulb tubular pump, and a front fixed guide vane (3-1) and a rear fixed guide vane (3-2) are installed on the inner wall of the bulb tubular pump; The rear fixed guide vane (3-2) faces the impeller (2) at the water inlet of the bulb tubular pump, and the impeller (2) is located between the front fixed guide vane (3-1) and the rear fixed guide vane (3-2), the rear fixed guide vane (3-2) faces the middle cylindrical body (4-1) of the bulb body (4), and the tail frustum (4-2) of the bulb body (4) faces the water outlet of the bulb tubular pump; thus, a bulb tubular pump is obtained; S2. Install the bulb tubular pump in the water flow pipeline, with the water inlet of the bulb tubular pump facing the water inlet channel (1) of the water flow pipeline, and the water outlet of the bulb tubular pump facing the water outlet channel (5) of the water flow pipeline; During the construction of the outlet flow channel (5), a special-shaped guide pier (6) is simultaneously cast in the outlet flow channel (5), with the front portion of the special-shaped guide pier facing the tail frustum (4-2) and the rear portion of the special-shaped guide pier facing the outlet of the outlet flow channel (5); the height of the special-shaped guide pier (6) is L, which is the height of the outlet flow channel (5); S3. Start the bulb tubular pump, the impeller (2) rotates, and water flows in from the water inlet channel (1). After passing through the front fixed guide vane (3-1), the impeller (2), and the rear fixed guide vane (3-2), the water flows in turn through the middle cylinder (4-1), the tail frustum (4-2), and the special-shaped guide pier (6), and is discharged from the water outlet channel (5); part of the water flows in from the water inlet (7-1) of the guide hole (7) in the front direction of the special-shaped guide pier (6), and flows out from the water outlet (7-2) of the guide hole (7) on both sides of the special-shaped guide pier (6); Since the front part of the special-shaped guide pier (6) is an arc shape that gradually decreases from the middle to the top and bottom, it is convenient to eliminate vortex and rectify the middle part of the outlet flow channel (5), and at the same time reduce the impact on the relatively stable flow parts around it, so as to reduce hydraulic loss. The rear part of the special-shaped guide pier (6) is an ellipse that gradually decreases. The horizontal center axis of the special-shaped guide pier is the longest, so as to improve the turbulent water flow in the center of the flow channel, and gradually becomes shorter from the horizontal center axis to the top and bottom, so as to reduce the impact on the relatively stable flow water area; the special-shaped guide pier with a streamlined horizontal section is used to smooth the bad flow behind the bulb body, reduce hydraulic loss, and at the same time the guide hole (7) on the vertical section further smoothes the water flow, and at the same time reduces the impact of the water flow on the special-shaped guide pier, reduces hydraulic loss, and improves the efficiency of the bulb cross-flow pump device.

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