Efficient self-suction centrifugal pump

Abstract

The utility model discloses an efficient self-suction centrifugal pump, which relates to the technical field of centrifugal pumps and comprises a pump body and a motor used for driving the pump body to operate, a water suction port used for water feeding and a water drainage port used for water drainage are integrally formed on the pump body, and a water suction pipe is fixedly connected to the front port of the water suction port; an exhaust pipe communicated with the interior of the pump body is fixedly installed on the outer wall of the pump body, an electromagnetic valve used for closing the exhaust pipe is arranged on the exhaust pipe, a vacuum pump is fixedly installed at the end, away from the pump body, of the exhaust pipe, and the exhaust end of the vacuum pump is communicated with the exhaust pipe. The self-priming centrifugal pump solves the problem that before the self-priming centrifugal pump is started, air in the pump body and the water suction pipe needs to be pumped out to form vacuum by means of mechanical energy of the self-priming centrifugal pump, and the working efficiency of the self-priming centrifugal pump is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal pumps, and in particular relates to a high-efficiency self-priming centrifugal pump. Background Art

[0002] A centrifugal pump is a pump that transports liquids by the centrifugal force generated by the rotation of the impeller. It is mainly composed of an impeller, a pump body, a pump shaft, bearings, sealing rings and a stuffing box. Its main features include: compact structure, wide flow and head range, uniform flow, stable operation, low vibration, and low equipment installation, maintenance and repair costs.

[0003] The existing centrifugal pump technology has the following problems: the traditional centrifugal pump has insufficient filtering performance. During use, sand and gravel and other debris can easily enter the water pressure chamber and damage the internal impeller or cause blockage of the outlet pipe, affecting the working process and increasing maintenance costs.

[0004] The existing patent (application number: CN202021430884.1) proposes a high-efficiency anti-clogging centrifugal pump, including a fixed base and a stuffing box body, the stuffing box body is installed on the outer wall of the upper end of the right side of the fixed base, the right end of the stuffing box body is connected with a volute casing, and an outlet pipe is arranged on the circumferential outer wall of the upper end of the volute casing. The fixed outer frame ring and the fixed inner frame ring are used as the supporting outer frame structure of the anti-clogging filter cartridge. During the installation process, the fixed outer frame ring is pushed and pressed so that the fixed outer frame ring and the fixed inner frame ring are brought close to each other, and the sliding push rod at the left end of the fixed outer frame ring squeezes the telescopic spring in the telescopic sleeve, so that the telescopic spring has a certain elastic potential energy, and when the fixed outer frame ring is loosened, the fixed outer frame ring is opened outward under the elastic force of the telescopic spring and stuck in the placement groove, so that the filter screen is fixedly installed in the wall of the water inlet pipe, thereby preventing sand and gravel and other debris from entering the water pressure chamber to damage the internal impeller or cause blockage.

[0005] However, before the self-priming centrifugal pump works, the pump body and the water inlet pipe must be filled with water to form a vacuum state. When the impeller rotates rapidly, the blades cause the water to rotate quickly, and the rotating water flies out of the impeller under the action of centrifugal force;

[0006] Since the pump body and suction pipe of the self-priming centrifugal pump need to use the mechanical energy of the self-priming centrifugal pump to extract the air in the pump body and suction pipe to form a vacuum before starting, this method will increase the workload of the self-priming centrifugal pump and also reduce the working efficiency of the self-priming centrifugal pump.

[0007] In view of this, this application is hereby filed. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-efficiency self-priming centrifugal pump to achieve the desired purpose.

[0009] In order to solve the above technical problems, the utility model provides a high-efficiency self-priming centrifugal pump, including a pump body and a motor for driving the pump body, wherein a water inlet for water intake and a water outlet for water discharge are integrally formed on the pump body, and a water suction pipe is fixedly connected to the front end of the water inlet;

[0010] An exhaust pipe connected to the interior of the pump body is fixedly installed on the outer wall of the pump body, and an electromagnetic valve for closing the exhaust pipe is provided on the exhaust pipe. A vacuum pump is fixedly installed on one end of the exhaust pipe away from the pump body, and the exhaust end of the vacuum pump is connected to the exhaust pipe.

[0011] Furthermore, a control component for controlling the closing of the electromagnetic valve and the vacuum pump is provided on the outer wall of the water suction pipe, and the control component includes a sleeve fixedly installed on the outer wall of the water suction pipe, a sliding rod is slidably installed inside the sleeve, the bottom end of the sliding rod extends to the inside of the water suction pipe and is fixedly connected to a floating plate, a piston plate is slidably connected inside the sleeve, and the piston plate is fixedly connected to the outer wall of the sliding rod, and a first contact switch and a second contact switch are fixedly installed on the inner top wall of the sleeve, the first contact switch is electrically connected to the electromagnetic valve, and the second contact switch is electrically connected to the vacuum pump.

[0012] Furthermore, a through hole is provided on the top wall of the sleeve for the sleeve to pass through, the outer diameter of the sliding rod is matched with the inner diameter of the through hole, the top end of the sliding rod extends through the through hole to the top of the sleeve and is fixedly connected to a limiting plate, and the outer diameter of the limiting plate is larger than the inside of the through hole.

[0013] Furthermore, the piston plate is a disc structure, the outer circumferential wall of the piston plate is in contact with the inner wall of the sleeve, an annular groove is recessed on the outer circumferential wall of the piston plate, a sealing ring is embedded in the annular groove, and the outer wall of the sealing ring is in contact with the inner wall of the sleeve.

[0014] Furthermore, it also includes an anti-backflow component arranged inside the water suction pipe, the anti-backflow component includes a mounting column fixedly installed at the front port of the water suction pipe, a sealing plate is symmetrically installed on the outer wall of the mounting column, the outer wall of the sealing plate is fitted with the inner wall of the water suction pipe, and a limit block for limiting the rotation direction of the sealing plate is also provided on the inner wall of the water suction pipe, and the side wall of the limit block is fitted with the outer wall of the sealing plate.

[0015] Furthermore, the backflow prevention component also includes a support rod fixedly installed inside the water suction pipe, the support rod is provided with an arc-shaped slide groove, the inside of the arc-shaped slide groove is slidably connected with a bent rod, one end of the bent rod is fixedly connected to the rear side wall of the sealing plate, and a return spring is sleeved on the bent rod, one end of the return spring is abutted against the rear side wall of the sealing plate, and the other end of the return spring is abutted against the outer wall of the support rod.

[0016] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.

[0017] 1. In the utility model, by opening the electromagnetic valve and the vacuum pump, the vacuum pump can extract the air inside the pump body from the suction pipe, so that the interior of the pump body is in a vacuum state, forming a pressure difference with the external atmospheric pressure. Under the action of the atmospheric pressure, water enters the pump body through the water suction port, thereby realizing automatic and rapid start-up, thereby improving the efficiency of the self-priming centrifugal pump. As the vacuum pump continues to work, the interior of the water suction pipe will be filled with water. As the water level in the water suction pipe increases, the float plate will float upward, and the float plate can drive the sliding rod to move synchronously. The sliding rod drives the piston plate to slide upward along the inner wall of the sleeve. When the piston plate contacts the first contact switch and the second contact switch, the electromagnetic valve and the vacuum pump are powered off, and the electromagnetic valve and the vacuum pump can be automatically closed.

[0018] 2. In the utility model, the water suction pipe can be blocked by the cooperation of the arranged installation column and the sealing plate. When water needs to enter the water suction pipe during the startup of the vacuum pump, the flow of water can push the sealing plate to rotate with the installation column as the axis. After the sealing plate rotates, the water suction pipe is in an open state, and water can smoothly enter the interior of the water suction pipe. When the vacuum pump is turned off, the sealing plate is pushed to reset by the elastic force of the reset spring, and the two sealing plates close the water suction pipe, preventing the water flow inside the pump body from being in a state of no pressure, and the water flow will flow back by inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0020] Figure 1 This is a front view structural schematic diagram of the utility model;

[0021] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the backflow prevention component in the utility model;

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the water suction pipe in the utility model.

[0024] Numbers in the figure: 1. Motor; 2. Pump body; 3. Water suction port; 4. Discharge port; 5. Water suction pipe; 6. Air exhaust pipe; 7. Solenoid valve; 8. Vacuum pump; 9. Sleeve; 10. Sliding rod; 11. Limit plate; 12. First contact switch; 13. Second contact switch; 14. Piston plate; 15. Floating plate; 16. Mounting column; 17. Closing plate; 18. Limit block; 19. Support rod; 20. Bending rod; 21. Return spring.

[0025] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0029] like Figures 1 to 4 As shown, the utility model provides a high-efficiency self-priming centrifugal pump.

[0030] Specifically, by Figure 1-Figure 4 The pump body 2 includes a pump body 2 and a motor 1 for driving the pump body 2. A water inlet 3 for water inlet and a water outlet 4 for water outlet are integrally formed on the pump body 2. A water inlet pipe 5 is fixedly connected to the front end of the water inlet 3.

[0031] An exhaust pipe 6 connected to the interior of the pump body 2 is fixedly installed on the outer wall of the pump body 2, and an electromagnetic valve 7 for closing the exhaust pipe 6 is provided on the exhaust pipe 6. A vacuum pump 8 is fixedly installed on the end of the exhaust pipe 6 away from the pump body 2, and the exhaust end of the vacuum pump 8 is connected to the exhaust pipe 6. A control component for controlling the closing of the electromagnetic valve 7 and the vacuum pump 8 is provided on the outer wall of the water suction pipe 5. The control component includes a sleeve 9 fixedly installed on the outer wall of the water suction pipe 5, a sliding rod 10 is slidably installed inside the sleeve 9, the bottom end of the sliding rod 10 extends to the interior of the water suction pipe 5 and is fixedly connected to a floating plate 15, a piston plate 14 is slidably connected inside the sleeve 9, and the piston plate 14 is fixedly connected to the outer wall of the sliding rod 10, and a first contact switch 12 and a second contact switch 13 are fixedly installed on the inner top wall of the sleeve 9, the first contact switch 12 is electrically connected to the electromagnetic valve 7, and the second contact switch 13 is electrically connected to the vacuum pump 8.

[0032] Before using the centrifugal pump, by opening the electromagnetic valve 7 and the vacuum pump 8, the vacuum pump 8 can extract the air inside the pump body 2 from the exhaust pipe 6, so that the inside of the pump body 2 is in a vacuum state, forming a pressure difference with the external atmospheric pressure. Under the action of the atmospheric pressure, water enters the pump body 2 through the water suction port 3, thereby realizing automatic and rapid starting, thereby improving the efficiency of the self-priming centrifugal pump. As the vacuum pump 8 continues to work, the inside of the water suction pipe 5 will be filled with water. As the water level in the water suction pipe 5 increases, the floating plate 15 will float upward, and the floating plate 15 can drive the sliding rod 10 to move synchronously. The sliding rod 10 drives the piston plate 14 to slide upward along the inner wall of the sleeve 9. When the piston plate 14 contacts the first contact switch 12 and the second contact switch 13, the electromagnetic valve 7 and the vacuum pump 8 are powered off, and the electromagnetic valve 7 and the vacuum pump 8 can be automatically closed.

[0033] Then the motor 1 can drive the impeller inside the pump body 2 to rotate. When the impeller rotates rapidly, water can enter the pump body 2 from the water suction port 3. The blades cause the water entering the pump body 2 to rotate quickly. The rotating water flies out of the impeller under the action of centrifugal force, and the water in the pump body 2 will be thrown out from the discharge port 4.

[0034] Further:

[0035] like Figure 4 It is given that a through hole is opened on the top wall of the sleeve 9 for the sleeve 9 to pass through, the outer diameter of the sliding rod 10 is matched with the inner diameter of the through hole, the top end of the sliding rod 10 extends through the through hole to the top of the sleeve 9 and is fixedly connected with a limiting plate 11, and the outer diameter of the limiting plate 11 is larger than the inside of the through hole.

[0036] In the utility model, the through hole is set so that the slide rod 10 can slide vertically along the sleeve 9, thereby preventing the slide rod 10 from positionally shifting during the sliding process and improving the sliding stability of the slide rod 10. The limiting plate 11 is set to limit the sliding of the slide rod 10 and prevent the slide rod 10 from completely sliding into the sleeve 9.

[0037] Further:

[0038] like Figure 4 It is shown that the piston plate 14 is a disc structure, and the outer peripheral wall of the piston plate 14 fits with the inner wall of the sleeve 9. An annular groove is recessed on the outer peripheral wall of the piston plate 14, and a sealing ring is embedded in the annular groove. The outer wall of the sealing ring fits with the inner wall of the sleeve 9.

[0039] In the utility model, the piston plate 14 is provided to prevent the water entering the water suction pipe 5 from leaking from the sleeve 9, thereby ensuring the overall sealing of the water suction pipe 5. Example

[0040] As a specific implementation of the utility model, the utility model provides a high-efficiency self-priming centrifugal pump.

[0041] Specifically, Figure 1-Figure 3 The invention also includes an anti-backflow component arranged inside the water suction pipe 5, and the anti-backflow component includes a mounting column 16 fixedly mounted at the front end of the water suction pipe 5, and a sealing plate 17 is symmetrically mounted on the outer wall of the mounting column 16 for rotation, and the outer wall of the sealing plate 17 is fitted with the inner wall of the water suction pipe 5. A limit block 18 for limiting the rotation direction of the sealing plate 17 is also arranged on the inner wall of the water suction pipe 5, and the side wall of the limit block 18 is fitted with the outer wall of the sealing plate 17. The anti-backflow component also includes a support rod 19 fixedly mounted inside the water suction pipe 5, and an arc-shaped slide groove is provided on the support rod 19, and a curved rod 20 is slidably connected inside the arc-shaped slide groove, and one end of the curved rod 20 is fixedly connected to the rear side wall of the sealing plate 17, and a reset spring 21 is sleeved on the curved rod 20, and one end of the reset spring 21 abuts against the rear side wall of the sealing plate 17, and the other end of the reset spring 21 abuts against the outer wall of the support rod 19.

[0042] In the utility model, the water suction pipe 5 can be blocked by cooperating with the installation column 16 and the sealing plate 17. When water needs to enter the water suction pipe 5 during the startup of the vacuum pump 8, the flow of water can push the sealing plate 17 to rotate with the installation column 16 as the axis. After the sealing plate 17 rotates, the water suction pipe 5 is in an open state, and water can smoothly enter the water suction pipe 5. When the vacuum pump 8 is turned off, the sealing plate 17 is pushed to reset by the elastic force of the reset spring 21. The two sealing plates 17 close the water suction pipe 5, preventing the water flow inside the pump body 2 from being in a state without pressure, and the water flow will flow back by inertia.

[0043] Working principle: Before using the centrifugal pump, by opening the electromagnetic valve 7 and the vacuum pump 8, the vacuum pump 8 can extract the air inside the pump body 2 from the suction pipe 6, so that the inside of the pump body 2 is in a vacuum state, forming a pressure difference with the external atmospheric pressure. Under the action of the atmospheric pressure, the water source enters the pump body 2 through the water suction port 3, thereby realizing automatic and rapid start-up, thereby improving the efficiency of the self-priming centrifugal pump. As the vacuum pump 8 continues to work, the inside of the water suction pipe 5 will be filled with water. As the water level in the water suction pipe 5 increases, the floating plate 15 will float upward, and the floating plate 15 can drive the slide bar 1 0 synchronous displacement, the slide rod 10 drives the piston plate 14 to slide upward along the inner wall of the sleeve 9, when the piston plate 14 contacts the first contact switch 12 and the second contact switch 13, the electromagnetic valve 7 and the vacuum pump 8 are powered off, and the electromagnetic valve 7 and the vacuum pump 8 can be automatically closed; then the motor 1 can drive the impeller inside the pump body 2 to rotate, when the impeller rotates rapidly, water can enter the pump body 2 from the water suction port 3, the blades cause the water entering the pump body 2 to rotate quickly, the rotating water flies out of the impeller under the action of centrifugal force, and the water in the pump body 2 will be thrown out from the drain port 4.

[0044] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A high-efficiency self-priming centrifugal pump, comprising a pump body (2) and a motor (1) for driving the pump body, wherein a water inlet (3) for water intake and a water outlet (4) for water discharge are integrally formed on the pump body (2), and a water suction pipe (5) is fixedly connected to the front end of the water inlet (3); It is characterized in that An exhaust pipe (6) connected to the interior of the pump body (2) is fixedly mounted on the outer wall of the pump body (2); an electromagnetic valve (7) for closing the exhaust pipe (6) is provided on the exhaust pipe (6); a vacuum pump (8) is fixedly mounted on one end of the exhaust pipe (6) away from the pump body (2); an exhaust end of the vacuum pump (8) is connected to the exhaust pipe (6).

2. A high-efficiency self-priming centrifugal pump according to claim 1, characterized in that: A control assembly for controlling the closing of the electromagnetic valve (7) and the vacuum pump (8) is arranged on the outer wall of the water suction pipe (5), and the control assembly comprises a sleeve (9) fixedly mounted on the outer wall of the water suction pipe (5); a slide rod (10) is slidably mounted inside the sleeve (9); the bottom end of the slide rod (10) extends into the interior of the water suction pipe (5) and is fixedly connected to a floating plate (15); a piston plate (14) is slidably connected inside the sleeve (9); the piston plate (14) is fixedly connected to the outer wall of the slide rod (10); a first contact switch (12) and a second contact switch (13) are fixedly mounted on the inner top wall of the sleeve (9); the first contact switch (12) is electrically connected to the electromagnetic valve (7); and the second contact switch (13) is electrically connected to the vacuum pump (8).

3. A high-efficiency self-priming centrifugal pump according to claim 2, characterized in that: A through hole is provided on the top wall of the sleeve (9) for the sleeve (9) to pass through, the outer diameter of the slide rod (10) is matched with the inner diameter of the through hole, the top end of the slide rod (10) passes through the through hole and extends to the top of the sleeve (9) and is fixedly connected to a limit plate (11), and the outer diameter of the limit plate (11) is larger than the inside of the through hole.

4. A high-efficiency self-priming centrifugal pump according to claim 2, characterized in that: The piston plate (14) is a disc structure, the outer peripheral wall of the piston plate (14) is in contact with the inner wall of the sleeve (9), an annular groove is recessed on the outer peripheral wall of the piston plate (14), a sealing ring is embedded in the inner part of the annular groove, and the outer wall of the sealing ring is in contact with the inner wall of the sleeve (9).

5. A high-efficiency self-priming centrifugal pump according to claim 1, characterized in that: It also includes an anti-backflow component arranged inside the water suction pipe (5), the anti-backflow component comprising a mounting column (16) fixedly mounted at the front end of the water suction pipe (5), a sealing plate (17) being symmetrically mounted on the outer wall of the mounting column (16), the outer wall of the sealing plate (17) being in contact with the inner wall of the water suction pipe (5), a limiting block (18) for limiting the rotation direction of the sealing plate (17) being also arranged on the inner wall of the water suction pipe (5), the side wall of the limiting block (18) being in contact with the outer wall of the sealing plate (17).

6. A high-efficiency self-priming centrifugal pump according to claim 5, characterized in that: The backflow prevention assembly further comprises a support rod (19) fixedly mounted inside the water suction pipe (5), the support rod (19) being provided with an arc-shaped slide groove, a curved rod (20) being slidably connected inside the arc-shaped slide groove, one end of the curved rod (20) being fixedly connected to the rear side wall of the sealing plate (17), a return spring (21) being sleeved on the curved rod (20), one end of the return spring (21) being in contact with the rear side wall of the sealing plate (17), and the other end of the return spring (21) being in contact with the outer wall of the support rod (19).

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