Novel self-suction device for centrifugal pump

Abstract

The utility model discloses a novel self-suction device for a centrifugal pump, which comprises a self-suction tank, the side wall of the self-suction tank is fixedly connected with a water inlet pipe, and a filter component for filtering water is arranged in the self-suction tank; the water inlet hopper is arranged, water in the self-suction tank passes through the water inlet hopper, enters the water outlet pipe through the connecting pipe and is discharged out of the water outlet pipe, when water flows through the connecting pipe, the filtering plate in the connecting pipe filters the water flow, impurities in the water flow are prevented from entering the centrifugal pump, and when the water flows through the first impeller, the first impeller is driven to rotate; the first impeller drives the rotating rod to rotate, the rotating rod drives the cleaning rod to rotate, the cleaning rod cleans the surface of the filter plate, and the situation that impurities block the surface of the filter plate and affect passing of water flow is avoided. When the rotating rod rotates, the second impeller is driven to rotate, and the second impeller stirs water at the bottom of the self-suction tank; impurities at the bottom in the self-suction tank can be rolled up conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of self-priming devices, in particular to a novel self-priming device for a centrifugal pump. Background Art

[0002] It is a common design for new centrifugal pumps to use self-priming devices. The self-priming device can help the pump body quickly establish the necessary vacuum during the startup process, thereby automatically sucking in liquid and avoiding the trouble of manual filling or using external auxiliary devices. A common self-priming device is to set a return pipe at the inlet of the centrifugal pump, which returns the liquid from the outlet of the pump to the inlet to form a closed system. Before starting the pump, a certain negative pressure is formed by filling the pump body with liquid or introducing external liquid into the pump body, so that the liquid can be automatically sucked into the pump.

[0003] A self-priming device for a centrifugal pump is provided in the prior art (Announcement No.: CN212563664U), which comprises a self-priming device and a centrifugal pump. The self-priming device comprises an inlet section, an outlet section, a return pipe and a nozzle. The inlet section is in an S-tube shape, the upper end of the inlet section is connected to the water inlet pipeline, and the lower end is connected to the inlet of the centrifugal pump. A nozzle is arranged inside the inlet section, and the outlet of the nozzle points to the inlet of the centrifugal pump. An interface for connecting the return pipe is arranged outside the inlet section. The outlet section is in a straight tube shape, the outlet section is located above the centrifugal pump, the upper end of the outlet section is connected to the water outlet pipeline, and the lower end is connected to the outlet of the centrifugal pump. An interface for connecting the return pipe is arranged outside the outlet section, and the inlet section and the outlet section are connected through the return pipe. The utility model enables an ordinary centrifugal pump to have a self-priming function by adding a self-priming device to the ordinary centrifugal pump. The pump only needs to be filled before the first start-up, and the installation is easy. It can be used immediately after opening. After normal operation, the reflux valve is closed. Since the main pump is a centrifugal pump, the operation efficiency is high and the structure is simple.

[0004] However, the device still has the following defects:

[0005] When the device is in use, the water flow is not filtered, and the water flow directly enters the centrifugal pump. When the water flow contains impurities, the impurities will be blocked inside the centrifugal pump, causing damage to the centrifugal pump and affecting the normal use of the centrifugal pump. Therefore, we need to propose a new self-priming device for centrifugal pumps. Utility Model Content

[0006] The purpose of the utility model is to provide a novel self-priming device for a centrifugal pump. A filter assembly is arranged inside the self-priming tank to filter the water flow. The filtered water flow enters the interior of the centrifugal pump through a water outlet pipe to avoid impurities in the water flow that affect the use of the centrifugal pump, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A novel self-priming device for a centrifugal pump comprises a self-priming tank, a water inlet pipe is fixedly connected to the side wall of the self-priming tank, and a filter assembly for filtering water is arranged inside the self-priming tank;

[0009] The filter assembly includes a water inlet bucket fixedly installed on the bottom of the self-priming tank, the interior of the water inlet bucket is fixedly connected to a guide ring, the interior of the water inlet bucket is fixedly connected to a connecting pipe, the interior of the connecting pipe is fixedly connected to a filter plate, the interior of the filter plate is rotatably connected to a rotating rod, the rotating rod is rotatably connected to the water inlet bucket, the outer side of the rotating rod is fixedly connected to a plurality of first impellers distributed in an annular manner, the outer side of the rotating rod is fixedly connected to a cleaning rod, the cleaning rod is rotatably connected to the filter plate, and the outer side of the rotating rod is fixedly connected to a plurality of second impellers distributed in an annular manner.

[0010] Preferably, a water outlet pipe is fixedly connected to the side wall of the self-priming tank, and one end of the water outlet pipe is externally connected to a centrifugal pump.

[0011] Preferably, a water irrigation pipe is fixedly connected to the top of the self-priming tank, and a water injection pipe is externally connected to the upper end of the water irrigation pipe.

[0012] Preferably, the top of the self-priming tank is provided with an exhaust assembly for facilitating automatic exhaust;

[0013] The exhaust assembly includes an exhaust pipe fixedly installed on the top of the self-priming tank, a fixing plate fixedly connected to the inside of the exhaust pipe, a fixing frame fixedly connected to the lower end of the fixing plate, a spring sleeved on the outer side of the fixing frame, a first sealing plate slidably connected to the outer side of the fixing frame, a sealing ring abutting the outer side of the first sealing plate, the sealing ring fixedly installed in the inside of the exhaust pipe, and a sealing assembly for preventing water overflow is provided at the lower end of the fixing frame.

[0014] Preferably, the fixing frame is composed of two upper and lower fixing plates and a straight rod in the middle.

[0015] Preferably, the sealing assembly comprises a floating plate slidably connected to the outer side of the fixing frame, the upper end of the floating plate is fixedly connected to a second sealing plate, and the second sealing plate is slidably connected to the fixing frame.

[0016] Preferably, a drain pipe is fixedly connected to the bottom of the self-priming tank, and a sealing plug is provided at the lower end of the drain pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model is provided with a water inlet bucket, and the water inside the self-priming tank passes through the water inlet bucket, enters the water outlet pipe through the connecting pipe, and is discharged from the water outlet pipe. When the water flows through the connecting pipe, the filter plate inside the connecting pipe filters the water flow to prevent impurities in the water flow from entering the centrifugal pump. When the water flows through the first impeller, the first impeller is driven to rotate, and the first impeller drives the rotating rod to rotate, and the rotating rod drives the cleaning rod to rotate, and the cleaning rod cleans the surface of the filter plate to prevent impurities from being blocked on the surface of the filter plate and affecting the passage of the water flow. When the rotating rod rotates, it drives the second impeller to rotate, and the second impeller stirs the water at the bottom of the self-priming tank, so as to roll up the impurities at the bottom of the self-priming tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the filter assembly of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the exhaust assembly of the utility model.

[0023] In the figure: 1. self-priming tank; 2. water inlet pipe; 3. filter assembly; 31. water inlet bucket; 32. guide ring; 33. connecting pipe; 34. filter plate; 35. rotating rod; 36. first impeller; 37. cleaning rod; 38. second impeller; 4. water outlet pipe; 5. water filling pipe; 6. exhaust assembly; 61. exhaust pipe; 62. fixing plate; 63. fixing frame; 64. spring; 65. first sealing plate; 66. sealing ring; 67. floating plate; 68. second sealing plate; 7. drain pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 , the utility model provides a technical solution:

[0026] A novel self-priming device for a centrifugal pump comprises a self-priming tank 1, a water inlet pipe 2 is fixedly connected to the side wall of the self-priming tank 1, and a filter assembly 3 for filtering water is arranged inside the self-priming tank 1;

[0027] The filter assembly 3 includes a water inlet bucket 31 fixedly installed on the bottom of the self-priming tank 1, a guide ring 32 is fixedly connected to the inside of the water inlet bucket 31, a connecting pipe 33 is fixedly connected to the inside of the water inlet bucket 31, a filter plate 34 is fixedly connected to the inside of the connecting pipe 33, a rotating rod 35 is rotatably connected to the inside of the filter plate 34, the rotating rod 35 is rotatably connected to the water inlet bucket 31, a plurality of first impellers 36 distributed in an annular manner are fixedly connected to the outside of the rotating rod 35, a cleaning rod 37 is fixedly connected to the outside of the rotating rod 35, the cleaning rod 37 is rotatably connected to the filter plate 34, and a plurality of second impellers 38 distributed in an annular manner are fixedly connected to the outside of the rotating rod 35.

[0028] Exemplarily, one end of the water inlet pipe 2 is externally connected with a one-way valve to prevent the water inside the self-priming tank 1 from flowing out through the water inlet pipe 2 .

[0029] A water outlet pipe 4 is fixedly connected to the side wall of the self-priming tank 1, and one end of the water outlet pipe 4 is externally connected to a centrifugal pump.

[0030] Exemplarily, the water outlet pipe 4 discharges the filtered water, and the centrifugal pump pumps out the water inside the water outlet pipe 4 .

[0031] A water filling pipe 5 is fixedly connected to the top of the self-priming tank 1, and the upper end of the water filling pipe 5 is externally connected to a water injection pipe.

[0032] Exemplarily, before the self-priming tank 1 is used, the water injection pipe is opened, and water is injected into the interior of the self-priming tank 1 through the water injection pipe 5. When the water fills the self-priming tank 1, the water injection pipe is closed.

[0033] The top of the self-priming tank 1 is provided with an exhaust assembly 6 for facilitating automatic exhaust;

[0034] The exhaust assembly 6 includes an exhaust pipe 61 fixedly installed on the top of the self-priming tank 1, a fixing plate 62 is fixedly connected to the inside of the exhaust pipe 61, a fixing frame 63 is fixedly connected to the lower end of the fixing plate 62, a spring 64 is sleeved on the outer side of the fixing frame 63, a first sealing plate 65 is slidably connected to the outer side of the fixing frame 63, a sealing ring 66 is abutted on the outer side of the first sealing plate 65, the sealing ring 66 is fixedly installed in the inside of the exhaust pipe 61, and a sealing assembly for preventing water overflow is provided at the lower end of the fixing frame 63.

[0035] Illustratively, when the interior of the self-priming tank 1 contains air, when the air pressure reaches a certain level, the air pressure pushes the first sealing plate 65 to move upward, the spring 64 is compressed, the first sealing plate 65 moves out of the sealing ring 66, and the gas overflows from the sealing ring 66, thereby discharging the gas inside the self-priming tank 1. When the air pressure decreases, the spring 64 uses elastic force to clamp the first sealing plate 65 inside the sealing ring 66, and the exhaust pipe 61 is sealed by the first sealing plate 65 and the sealing ring 66.

[0036] The fixing frame 63 is composed of two upper and lower fixing plates and a straight rod in the middle.

[0037] Exemplarily, the fixing bracket 63 facilitates the installation of components such as the spring 64 .

[0038] The sealing assembly includes a floating plate 67 slidably connected to the outer side of the fixing frame 63 , and a second sealing plate 68 is fixedly connected to the upper end of the floating plate 67 , and the second sealing plate 68 is slidably connected to the fixing frame 63 .

[0039] Exemplarily, when there is more water inside the self-priming tank 1 , the floating plate 67 floats upward, driving the second sealing plate 68 to be stuck at the bottom of the exhaust pipe 61 , and the second sealing plate 68 seals the lower end of the exhaust pipe 61 .

[0040] A drain pipe 7 is fixedly connected to the bottom of the self-priming tank 1 , and a sealing plug is provided at the lower end of the drain pipe 7 .

[0041] Exemplarily, the drain pipe 7 facilitates the discharge of impurities inside the water inlet hopper 31 , and the sealing plug seals the lower end of the drain pipe 7 .

[0042] Working principle: before the self-priming tank 1 is used, the water injection pipe is opened, and water is injected into the interior of the self-priming tank 1 through the water injection pipe 5. When the water fills the self-priming tank 1, the water injection pipe is closed. When in use, water is injected into the interior of the self-priming tank 1 through the water inlet pipe 2. The water inside the self-priming tank 1 passes through the water inlet bucket 31, enters the water outlet pipe 4 through the connecting pipe 33, and is discharged from the water outlet pipe 4. When the water flows through the connecting pipe 33, the filter plate 34 inside the connecting pipe 33 filters the water flow to prevent impurities in the water flow from entering the centrifugal pump. When the water flows through the first impeller 36, the first impeller 36 is driven to rotate, and the first impeller 36 drives the rotating rod 35 to rotate. The rotating rod 35 drives the cleaning rod 37 to rotate, and the cleaning rod 37 cleans the surface of the filter plate 34 to prevent impurities from clogging the surface of the filter plate 34 and affecting the passage of the water flow. When the rotating rod 35 rotates, it drives the second impeller 38 to rotate, and the second impeller 38 stirs the water at the bottom of the self-priming tank 1, so as to roll up the impurities at the bottom of the self-priming tank 1.

[0043] When water flows into the self-priming tank 1, the liquid is subjected to external force, and the dissolved gas in the liquid can be released from the solution to form bubbles, which will generate gas inside the self-priming tank 1, the water level will drop, and the floating plate 67 and the second sealing plate 68 will be separated from the exhaust pipe 61. When the air pressure reaches one atmosphere, the self-priming tank 1 stops self-priming. Therefore, after a period of use, water is injected into the self-priming tank 1 through the water injection pipe. The water flow will compress the gas inside the self-priming tank 1, the air pressure increases, and the gas pushes the first sealing plate 65 to move upward, and the spring 64 is compressed. The first sealing plate 65 moves out of the sealing ring 66, and the gas overflows from the sealing ring 66 to discharge the gas inside the self-priming tank 1. When the air pressure decreases, the spring 64 uses elastic force to clamp the first sealing plate 65 inside the sealing ring 66, and the exhaust pipe 61 is sealed by the first sealing plate 65 and the sealing ring 66. When there is more water inside the self-priming tank 1, the floating plate 67 floats upward, driving the second sealing plate 68 to be clamped on the bottom of the exhaust pipe 61. The second sealing plate 68 seals the lower end of the exhaust pipe 61, and the self-priming effect of the self-priming tank 1 is restored.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel self-priming device for a centrifugal pump, comprising a self-priming tank (1), characterized in that: A water inlet pipe (2) is fixedly connected to the side wall of the self-priming tank (1), and a filtering component (3) for filtering water is arranged inside the self-priming tank (1); The filter assembly (3) comprises a water inlet bucket (31) fixedly mounted on the bottom of the self-priming tank (1); a guide ring (32) is fixedly connected to the inside of the water inlet bucket (31); a connecting pipe (33) is fixedly connected to the inside of the water inlet bucket (31); a filter plate (34) is fixedly connected to the inside of the connecting pipe (33); a rotating rod (35) is rotatably connected to the inside of the filter plate (34); the rotating rod (35) is rotatably connected to the water inlet bucket (31); a plurality of first impellers (36) distributed in an annular manner are fixedly connected to the outside of the rotating rod (35); a cleaning rod (37) is fixedly connected to the outside of the rotating rod (35); the cleaning rod (37) is rotatably connected to the filter plate (34); and a plurality of second impellers (38) distributed in an annular manner are fixedly connected to the outside of the rotating rod (35).

2. A novel self-priming device for a centrifugal pump according to claim 1, characterized in that: A water outlet pipe (4) is fixedly connected to the side wall of the self-priming tank (1), and one end of the water outlet pipe (4) is externally connected to a centrifugal pump.

3. A novel self-priming device for a centrifugal pump according to claim 2, characterized in that: The top of the self-priming tank (1) is fixedly connected with a water irrigation pipe (5), and the upper end of the water irrigation pipe (5) is externally connected with a water injection pipe.

4. A novel self-priming device for a centrifugal pump according to claim 3, characterized in that: The top of the self-priming tank (1) is provided with an exhaust assembly (6) for facilitating automatic exhaust; The exhaust assembly (6) comprises an exhaust pipe (61) fixedly mounted on the top of the self-priming tank (1); a fixing plate (62) is fixedly connected to the inside of the exhaust pipe (61); a fixing frame (63) is fixedly connected to the lower end of the fixing plate (62); a spring (64) is sleeved on the outer side of the fixing frame (63); a first sealing plate (65) is slidably connected to the outer side of the fixing frame (63); a sealing ring (66) is abutted on the outer side of the first sealing plate (65); the sealing ring (66) is fixedly mounted on the inside of the exhaust pipe (61); and a sealing assembly for preventing water overflow is provided at the lower end of the fixing frame (63).

5. A novel self-priming device for a centrifugal pump according to claim 4, characterized in that: The fixing frame (63) is composed of two upper and lower fixing plates and a straight rod in the middle.

6. A novel self-priming device for a centrifugal pump according to claim 4, characterized in that: The sealing assembly comprises a floating plate (67) slidably connected to the outer side of the fixing frame (63); the upper end of the floating plate (67) is fixedly connected to a second sealing plate (68); and the second sealing plate (68) is slidably connected to the fixing frame (63).

7. A novel self-priming device for a centrifugal pump according to claim 4, characterized in that: The bottom of the self-priming tank (1) is fixedly connected to a drainage pipe (7), and a sealing plug is provided at the lower end of the drainage pipe (7).

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