Tubular pump with deformable bulb body shell and control method thereof

Abstract

The invention provides a tubular pump with a deformable bulb shell and a control method of the tubular pump, and belongs to the technical field of hydraulic engineering. The outer side of a rigid bulb of the tubular pump is sleeved with a flexible material shell, the flexible material shell is supported by an electric hydraulic push rod structure, and the height of the flexible material shell is controlled by the electric hydraulic push rod structure; when the water flow quantity changes, the probe of the flow measuring instrument detects the flow quantity of the water flow and sends a signal to the receiver of the automatic control device, the receiver receives a signal value and sends a signal to the actuator after the signal value is matched with a preset signal value, and the actuator drives the power supply to output a corresponding voltage value according to the preset signal value. The electric hydraulic push rod structure outputs corresponding pushing force according to the corresponding voltage value and is used for controlling the extending stroke of the push rod, so that the radian of the flexible material shell is correspondingly changed to adapt to different water flow rates, the influence of the bulb body shell on water flow is minimum, abrasion of the bulb body shell is reduced, and the efficiency of the tubular pump is improved.

Description

Technical Field

[0001] The invention relates to a tube flow pump with a deformable bulb shell and a control method thereof, belonging to the technical field of water conservancy engineering. Background Art

[0002] Tubular pumps are widely used in low-lift pumping stations. In tubular pumps, the outlet channel is an important component, which can diffuse the water flow, recover kinetic energy, improve the flow pattern of the water flow, reduce turbulence and eddy currents when the water flows out of the pump, and maintain the smooth flow of the fluid. In current practical projects, the material of the bulb shell is basically rigid material, and there is a lack of effective regulation measures for water flow at different flow rates, which may affect the flow pattern of the water flow and reduce the efficiency of the tubular pump.

[0003] If the flow pattern of water flow under different flow rates can be realized, the influence of the bulb shell on the water flow can be effectively improved. In the prior art, the flow pattern of the outlet water channel is improved by optimizing the guide vane or setting a middle partition pier to avoid backflow and vortex in the outlet water channel, but the effect is not obvious, and the position of the middle partition pier is fixed and cannot be freely adjusted. At present, there is no bulb shell structure that can realize free adjustment of deformation according to the change of water flow pattern. Summary of the invention

[0004] Technical problem to be solved by the present invention: In the prior art, the material of the outer shell of the bulb body in the through-flow pump is basically rigid material, and there is a lack of effective adjustment measures for the water flow at different flow rates, which will affect the flow state of the water flow and reduce the efficiency of the through-flow pump. The method of optimizing the guide vane body or setting a middle partition pier to improve the flow state of the outlet flow channel and avoid backflow and vortex in the outlet flow channel has no obvious effect, and the position of the middle partition pier is fixed and cannot be freely adjusted.

[0005] In order to solve the above technical problems, the present invention provides a flow pump with a deformable bulb body shell, including a rigid bulb body, a plurality of electric hydraulic push rod structures fixedly connected to the middle circumference of the rigid bulb body, a flexible material shell is sleeved on the outer side of the middle circumference of the rigid bulb body, both ends of the flexible material shell are fixedly connected to the rigid bulb body, and the electric hydraulic push rod structure is used to support the flexible material shell.

[0006] The aforementioned through-flow pump with a deformable bulb body shell also includes an impeller and a guide vane. The impeller is coaxially connected and fixed to the main shaft inside the rigid bulb body, and the guide vane is fixedly connected to the outer side of the front section of the rigid bulb body.

[0007] In the aforementioned through-flow pump with a deformable bulb body shell, the flexible section of the flexible material shell is made of high-strength flexible material (such as rubber material).

[0008] The aforementioned through-flow pump with a deformable bulb body shell also includes a casing and a supporting structure. The casing is divided into an inlet flow channel section, an impeller section, a guide vane section, a bulb body section, a support plate section, and an outlet flow channel section. Each section is fixed by a flange connection, and the supporting structure is fixedly connected to the bottom of the casing, so that the through-flow pump can be more stable when in use.

[0009] The aforementioned through-flow pump with a deformable bulb body shell also includes a flow meter, an automatic control device, and a support plate. The flow meter is installed on the inner side of the bulb body segment, and the automatic control device is installed on the lower side of the motor inside the rigid bulb body. The flow meter and the automatic control device are connected via wireless data communication. The flow meter is a prior art and is a common flow meter on the market. The support plate is fixedly connected to the upper and lower sides of the support plate section and is used to support the rigid bulb body.

[0010] The aforementioned through-flow pump with a deformable bulb body shell, the automatic control device includes a protective shell, a receiver, an actuator, and a power supply, wherein the receiver is connected to the actuator through wires, and the actuator is connected to the power supply through wires.

[0011] The aforementioned through-flow pump with a deformable bulb body shell, wherein the plurality of electric hydraulic push rod structures are arranged in a straight line along the central axis of the rigid bulb body, and a plurality of rows of electric hydraulic push rod structures arranged in a straight line are distributed on the circumference of the rigid bulb body, and the electric hydraulic push rod structures are connected to the power supply in the automatic control device through wires; The circumference of the rigid bulb body includes at least two upper and lower rows of electric hydraulic push rod structures arranged in a straight line.

[0012] The aforementioned through-flow pump with a deformable bulb body shell, the electric hydraulic push rod structure includes a motor, a coupling, an oil pump, an oil tank, an oil cylinder, a push rod, and a column, and each part is tightly connected together through a hydraulic system.

[0013] The aforementioned through-flow pump with a deformable bulb body shell has a row of electric hydraulic push rod structures arranged at intervals of 45 degrees along the circumference of the rigid bulb body.

[0014] The control method of the aforementioned through-flow pump with a deformable bulb body shell: By presetting signal values ​​in the receiver (12) and the actuator (13), the flow rate of the water flow is detected by the probe of the flow meter (3), and a signal is sent to the receiver (12). After the receiver (12) receives and matches the preset signal value, it sends a signal to the actuator (13). The actuator (13) drives the power supply (14) to output a corresponding voltage value according to the preset signal value, and the electric hydraulic push rod structure (10) outputs a corresponding pushing force according to the corresponding voltage value, which is used to control the extension stroke of the push rod (27) so that the curvature of the flexible material housing (4) changes accordingly. The relationship between the curvature of the flexible material housing (4) and the flow rate of water detected by the probe of the flow meter (3) is expressed as follows: α =0.14+0.33× Q / Q 0 in, α is the curvature of the flexible material shell (4), rad; Q is the actual water flow rate of the tubular pump, m 3 / s ; Q 0 is the water flow rate corresponding to the optimal operating point of the tubular pump, m 3 / s .

[0015] When the actual water flow rate is 1.5 Q 0 When the curvature of the flexible material shell is about 0.64 rad; when the actual water flow rate is 0.5 Q 0 When , the curvature of the flexible material shell is about 0.31rad.

[0016] The beneficial effects achieved by the present invention are as follows: a flexible material shell is sleeved on the outside of the rigid bulb body of the cross-flow pump, and the flexible material shell is supported by an electric hydraulic push rod structure. The height of the flexible material shell is controlled by the electric hydraulic push rod structure. When the water flow and water volume change, the probe of the flow meter detects the flow rate of the water flow and sends a signal to the receiver of the automatic control device. After the receiver receives and matches the preset signal value, it sends a signal to the actuator. The actuator drives the power supply to output a corresponding voltage value according to the preset signal value. The electric hydraulic push rod structure outputs a corresponding pushing force according to the corresponding voltage value, which is used to control the extension stroke of the push rod, so that the curvature of the flexible material shell changes accordingly to adapt to different water flow rates, so that the influence of the bulb body shell on the water flow is minimized, the wear of the bulb body shell is reduced, and the efficiency of the cross-flow pump is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a wireframe diagram of the internal structure of the tubular pump.

[0018] Attached Figure 2 This is a wireframe diagram of the cross-flow pump.

[0019] Attached Figure 3 This is a cross-sectional view of a through-flow pump.

[0020] Attached Figure 4 This is a wireframe diagram of the guide vane and flexible material structure.

[0021] Attached Figure 5 Wireframe diagram of the internal structure of the automatic control device Attached Figure 6 Wireframe diagram of the electric hydraulic actuator structure arrangement.

[0022] Attached Figure 7 Wireframe diagram of an electric hydraulic actuator.

[0023] Figure numerals: 1. impeller, 2. guide vane, 3. flow meter, 4. flexible material shell, 5. rigid bulb body, 6. flange, 7. support structure, 8. automatic control device, 9. support plate, 10. electric hydraulic push rod structure, 11. protective shell, 12. receiver, 13. actuator, 14. power supply, 15. water inlet channel section, 16. impeller section, 17 guide vane section, 18. bulb body section, 19. support plate section, 20. water outlet channel section, 21. motor, 22. coupling, 23. oil pump, 24. oil tank body, 25. oil cylinder, 26. push rod, 27. column. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described below with reference to the accompanying drawings. Embodiment 1

[0025] like Figure 1 As shown, the present invention provides a through-flow pump with a deformable bulb body shell, comprising an impeller 1, a guide vane 2, a flexible material shell 4, and a rigid bulb body 5; The impeller 1 is coaxially connected and fixed through the main shaft inside the rigid bulb body 5, the guide vane 2 is fixedly connected to the outside of the front section of the rigid bulb body 5, the flexible material shell 4 is sleeved on the circumference of the middle section of the rigid bulb body 5, and the two ends of the flexible material shell 4 are fixedly connected to the rigid bulb body 5; The flexible section of the flexible material shell 4 is made of high-strength flexible material (such as rubber material).

[0026] like Figure 2 As shown, the casing of the tubular pump is divided into a water inlet channel section 15, an impeller section 16, a guide vane section 17, a bulb body section 18, a support plate section 19, and a water outlet channel section 20, and each section is connected and fixed by a flange 6; The casing of the crossflow pump further includes a support structure 7 below, and the support structure 7 is fixedly connected to the bottom of the casing, so that the crossflow pump can be more stable when in use.

[0027] like Figure 3As shown, it also includes a flow meter 3, an automatic control device 8, a support plate 9, and an electric hydraulic push rod structure 10. The flow meter 3 is installed on the inner side of the bulb body section 18, and the automatic control device 8 is installed on the lower side of the motor inside the rigid bulb body 5. The flow meter 3 is connected to the automatic control device 8 through wireless data communication. Among them, the flow meter 3 is a prior art and belongs to the common flow meter on the market.

[0028] The support plate 9 is fixedly connected to the upper and lower sides of the support plate segment 19 to support the rigid bulb body 5; The multiple electric hydraulic push rod structures 10 are fixedly connected to the middle circumference of the rigid bulb body 5 to support the flexible material shell 4; The electric hydraulic push rod structure 10 is electrically connected to the automatic control device 8 through electric wires.

[0029] When the probe of the flow meter 3 measures the flow velocity, the sensor transmits the data signal to the automatic control device 8, and the automatic control device 8 controls the movement of the electric hydraulic push rod structure 10 after receiving the signal.

[0030] like Figure 5 As shown, the automatic control device 8 includes a protective shell 11, a receiver 12, an actuator 13, and a power supply 14, wherein the receiver 12 is connected to the actuator 13 through wires, and the actuator 13 is connected to the power supply 14 through wires.

[0031] like Figure 6 As shown, a plurality of electric hydraulic push rod structures 10 are arranged in a straight line along the central axis of the rigid bulb body 5, and a plurality of rows of electric hydraulic push rod structures 10 are distributed on the circumference of the rigid bulb body 5; The circumference of the rigid bulb body 5 includes at least two upper and lower rows of electric hydraulic push rod structures 10 arranged in a straight line, and the number of the electric hydraulic push rod structures 10 in each row is determined according to the size of the rigid bulb body 5.

[0032] like Figure 7 As shown, the electric hydraulic push rod structure 10 includes a motor 21, a coupling 22, an oil pump 23, an oil tank body 24, an oil cylinder 25, a push rod 26, and a column 27. Each part is tightly connected together through a hydraulic system. When the electric hydraulic push rod structure is working, the motor 21 drives the oil pump 23 to output pressure oil through forward and reverse rotation, and controls the oil flow to the oil cylinder 25 through the oil tank 24, thereby realizing the reciprocating motion of the push rod 26, thereby driving the column 27 to move up and down.

[0033] When the water flow changes, the probe of the flow meter 3 detects the flow rate of the water flow and sends a signal to the receiver 12 of the automatic control device 8. After receiving the analysis signal, the receiver 12 sends a signal to the actuator 13. After receiving the signal, the actuator 13 drives the power supply 14. The power supply 14 drives the motor 21 of the electric hydraulic push rod structure 10. The push rod 26 uses the motor 21 as a power source, outputs pressure oil through the oil pump 23, and is controlled by the oil tank body 24 to the oil cylinder 25, thereby realizing the reciprocating motion of the push rod 26, thereby changing the height of the column 27, so that the shape of the flexible material shell 4 is changed, the influence of the water flow is reduced, the wear of the rigid bulb body 5 is reduced, and the efficiency of the through-flow pump is improved. Embodiment 2

[0034] Different from the first embodiment, a row of electric hydraulic push rod structures 10 are arranged every 45° along the circumference of the rigid bulb body 5. Such an arrangement can optimize the shape change effect of the flexible material shell 4 and better reduce the impact of water flow on the rigid bulb body 5. Embodiment 3

[0035] This embodiment provides a control method for a throughflow pump with a deformable bulb body shell: By presetting signal values ​​in the receiver (12) and the actuator (13), the flow rate of the water flow is detected by the probe of the flow meter (3), and a signal is sent to the receiver (12). After the receiver (12) receives and matches the preset signal value, it sends a signal to the actuator (13). The actuator (13) drives the power supply (14) to output a corresponding voltage value according to the preset signal value, and the electric hydraulic push rod structure (10) outputs a corresponding pushing force according to the corresponding voltage value, which is used to control the extension stroke of the push rod (27) so that the curvature of the flexible material housing (4) changes accordingly. The relationship between the curvature of the flexible material housing (4) and the flow rate of water detected by the probe of the flow meter (3) is expressed as follows: α =0.14+0.33× Q / Q 0 in, α is the curvature of the flexible material shell (4), rad; Q is the actual water flow rate of the tubular pump, m 3 / s ; Q 0 is the water flow rate corresponding to the optimal operating point of the tubular pump, m 3 / s .

[0036] When the actual water flow rate is 1.5 Q 0When the curvature of the flexible material shell is about 0.64 rad; when the actual water flow rate is 0.5 Q 0 When , the curvature of the flexible material shell is about 0.31rad.

[0037] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A through-flow pump with a deformable bulb body shell, comprising a rigid bulb body (5), characterized in that: A plurality of electric hydraulic push rod structures (10) are fixedly connected to the middle circumference of the rigid bulb body (5); a flexible material shell (4) is sleeved on the outer side of the middle circumference of the rigid bulb body (5); two ends of the flexible material shell (4) are fixedly connected to the rigid bulb body (5); and the electric hydraulic push rod structure (10) is used to support the flexible material shell (4).

2. The through-flow pump with a deformable bulb body shell according to claim 1, characterized in that: It also comprises an impeller (1) and a guide vane (2), wherein the impeller (1) is coaxially connected and fixed via a main shaft inside the rigid bulb body (5), and the guide vane (2) is fixedly connected to the outside of the front section of the rigid bulb body (5).

3. The through-flow pump with a deformable bulb body shell according to claim 2, characterized in that: The flexible section of the flexible material shell (4) is made of rubber.

4. The through-flow pump with a deformable bulb body shell according to claim 1, characterized in that: It also includes a casing and a support structure (7), wherein the casing is divided into a water inlet flow channel section (15), an impeller section (16), a guide vane section (17), a bulb body section (18), a support plate section (19), and a water outlet flow channel section (20), each section being connected and fixed using a flange (6), and the support structure (7) is fixedly connected to the bottom of the casing.

5. The through-flow pump with a deformable bulb body shell according to claim 4, characterized in that: It also includes a flow meter (3), an automatic control device (8), and a support plate (9), wherein the flow meter (3) is mounted on the inner side of the bulb body section (18), the automatic control device (8) is mounted on the lower side of the motor inside the rigid bulb body (5), the flow meter (3) and the automatic control device (8) are connected via wireless data communication, and the support plate (9) is fixedly connected to the upper and lower sides of the support plate section (19) and is used to support the rigid bulb body (5).

6. The through-flow pump with a deformable bulb body shell according to claim 5, characterized in that: The automatic control device (8) comprises a protective shell (11), a receiver (12), an actuator (13), and a power supply (14), wherein the receiver (12) and the actuator (13) are connected via wires, and the actuator (13) and the power supply (14) are connected via wires.

7. The through-flow pump with a deformable bulb body shell according to claim 6, characterized in that: The plurality of electric hydraulic push rod structures (10) are arranged in a straight line along the central axis of the rigid light bulb body (5), and a plurality of rows of electric hydraulic push rod structures (10) arranged in a straight line are distributed on the circumference of the rigid light bulb body (5), and the electric hydraulic push rod structures (10) are connected to a power source (14) via electric wires.

8. The through-flow pump with a deformable bulb body shell according to claim 7, characterized in that: The circumference of the rigid bulb body (5) includes at least two upper and lower rows of electric hydraulic push rod structures (10) arranged in a straight line.

9. The through-flow pump with a deformable bulb body shell according to claim 8, characterized in that: A row of electric hydraulic push rod structures (10) is arranged at intervals of 45° on the circumference of the rigid bulb body (5).

10. The control method of the through-flow pump with a deformable bulb body shell according to any one of claims 1 to 9, characterized in that: By presetting signal values ​​in the receiver (12) and the actuator (13), the flow rate of the water flow is detected by the probe of the flow meter (3), and a signal is sent to the receiver (12). After the receiver (12) receives and matches the preset signal value, it sends a signal to the actuator (13). The actuator (13) drives the power supply (14) to output a corresponding voltage value according to the preset signal value. The electric hydraulic push rod structure (10) outputs a corresponding pushing force according to the corresponding voltage value, which is used to control the extension stroke of the push rod (27) so that the curvature of the flexible material housing (4) changes accordingly. The relationship between the curvature of the flexible material housing (4) and the flow rate of water detected by the probe of the flow meter (3) is expressed as follows: α =0.14+0.33× Q / Q 0； in, α is the curvature of the flexible material shell (4), rad; Q is the actual water flow rate of the tubular pump, m 3 / s ; Q 0 is the water flow rate corresponding to the optimal operating point of the tubular pump, m 3 / s。

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