An internally immersed high-lift stainless steel self-priming pump

Abstract

The utility model discloses an internally immersed high-lift stainless steel self-priming pump, comprising an internally immersed high-lift stainless steel self-priming pump body, a water pool, a suction pipe, a water outlet pipe and a butterfly valve, wherein the input end of the internally immersed high-lift stainless steel self-priming pump body is provided with a suction pipe, and the other end of the suction pipe extends deep into the water pool, the output end of the internally immersed high-lift stainless steel self-priming pump body is provided with a water outlet pipe, and the water outlet pipe is provided with a butterfly valve; the internally immersed high-lift stainless steel self-priming pump body comprises a motor, a pump body, an impeller, a guide assembly, a rear cover body, a mechanical seal and a shaft sleeve assembly, the right side outer wall of the motor shaft of the motor is sleeved with a rear cover body, and a mechanical seal is provided between the rear cover body and the outer wall of the motor shaft of the motor, which is an internally immersed structure, and is configured with a reflux check valve and a multi-stage impeller and a guide assembly, so that the lift of the stainless steel self-priming pump becomes higher, the efficiency of the pump is improved, the self-priming time is shortened, and the manufacturing cost is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field related to stamping stainless steel self-priming pumps, and specifically relates to an internally immersed high-lift stainless steel self-priming pump. Background Art

[0002] For ordinary centrifugal pumps, if the suction liquid level is below the impeller, water should be pre-filled when starting, which is very inconvenient; in order to store water in the pump, the suction pipe inlet needs to have a bottom valve. When the pump is working, the bottom valve causes a large hydraulic loss; the so-called self-priming pump does not need to be filled with water before starting. After a short period of operation, the pump itself can suck up water and put it into normal operation.

[0003] The working process of a self-priming pump: Usually, a certain amount of water is stored in the pump. After the pump is started, due to the rotation of the impeller, the air and water in the suction pipe are fully mixed and discharged to the air-water separation chamber. The gas in the upper part of the air-water separation chamber is discharged, and the liquid in the lower part returns to the impeller and mixes with the gas in the suction pipe until all the gas in the pump and the suction pipe is discharged, completing self-priming and pumping water normally.

[0004] There are two main structures of self-priming pumps on the market:

[0005] One is external immersion type and the other is jet type. Both have single-stage impeller structures. Therefore, during the use of the two pumps, the lift is low, the efficiency is low, the self-priming time is long, and the production cost is high. Utility Model Content

[0006] The utility model aims to provide an internally immersed high-lift stainless steel self-priming pump to solve the problems of low lift, low efficiency, long self-priming time and high manufacturing cost proposed in the above background technology.

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

[0008] An internally immersed high-lift stainless steel self-priming pump, comprising an internally immersed high-lift stainless steel self-priming pump body, a water pool, a suction pipe, a water outlet pipe and a butterfly valve, wherein the input end of the internally immersed high-lift stainless steel self-priming pump body is provided with a suction pipe, and the other end of the suction pipe extends into the water pool, and the output end of the internally immersed high-lift stainless steel self-priming pump body is provided with a water outlet pipe, and the water outlet pipe is provided with a butterfly valve;

[0009] The main body of the internally immersed high-lift stainless steel self-priming pump comprises a motor, a pump body, an impeller, a flow guide assembly, a rear cover body, a mechanical seal and a sleeve assembly. The right outer wall of the motor shaft of the motor is sleeved with a rear cover body, and a mechanical seal is provided between the rear cover body and the outer wall of the motor shaft of the motor. A mechanical seal gasket is sleeved on the right outer wall of the motor shaft of the motor. The outer wall of the motor shaft of the motor is sleeved with a sleeve assembly near the right side of the mechanical seal gasket. A plurality of impellers are provided on the sleeve assembly, and the mechanical seal gasket, the sleeve assembly and the plurality of impellers are fixed to the outer wall of the motor shaft of the motor through impeller fastening nuts and spring washers. A flow guide assembly is provided on the right end face of the rear cover body, and the plurality of impellers are located inside the flow guide assembly. Through the mutual cooperation of the plurality of impellers and the flow guide assembly, the series connection function of the plurality of water pumps is realized, and the head is superimposed and improved. The pump body is installed on the right side of the motor by screws, and the flow guide assembly is located inside the pump body.

[0010] An annular cylindrical cavity is formed between the flow guide component and the pump body, the upper space of the cavity is a gas-liquid separation chamber, and the lower space of the cavity is a liquid storage chamber.

[0011] Preferably, the sleeve assembly includes a first sleeve, a second sleeve, a sliding bearing inner sleeve, a third sleeve, and a fourth sleeve, and the first sleeve, the second sleeve, the sliding bearing inner sleeve, the third sleeve, and the fourth sleeve are sleeved on the outer wall of the motor shaft of the motor in order from right to left.

[0012] Preferably, the flow guide assembly includes a fifth flow guide component, a flow guide tube gland fastener, a fourth flow guide component, a third flow guide component, a second flow guide component, a first flow guide component, a flow guide tube gland body, a flow guide tube inlet pipe bracket, a flow guide tube inlet pipe and a reflux check valve, the fourth flow guide component is provided on the right side of the fifth flow guide component, the third flow guide component is provided on the right side of the fourth flow guide component, the second flow guide component is provided on the right side of the third flow guide component, the first flow guide component is provided on the right side, a plurality of reflux check valves capable of realizing the self-priming function of the multi-stage centrifugal pump and shortening the self-priming time are provided inside the first flow guide component, and the first flow guide component is provided on the right side The guide tube gland body has two guide tube gland fasteners, and the two guide tube gland fasteners are arranged on the upper and lower sides of the right end surface of the rear cover body, and the guide tube gland body is fixed by the two guide tube gland fasteners. The right side of the guide tube gland body is equipped with a guide tube inlet pipe through a guide tube inlet pipe bracket, and an O-ring is provided between the left outer part of the guide tube inlet pipe, the right outer wall of the guide tube gland body and the inner wall of the guide tube inlet pipe bracket. The right outer wall of the guide tube inlet pipe is fixedly connected to the right inner wall of the pump body through the guide tube inlet pipe bracket, and an O-ring is provided between the right outer wall of the guide tube inlet pipe, the right inner wall of the pump body and the inner wall of the guide tube inlet pipe bracket.

[0013] Preferably, the reflux check valve comprises a fastening nut, an upper rubber valve disc, a valve body support seat, a lower rubber valve disc, a valve stem, a spring and a valve body, a valve body support seat being provided on the inner upper side of the valve body, a longitudinal valve stem being slidably connected to the middle inner part of the valve body support seat, an upper rubber valve disc being mounted on the top of the valve stem via two fastening nuts, and the two fastening nuts are located on the upper and lower sides of the upper rubber valve disc, a lower outer wall of the valve stem is provided with a lower rubber valve disc, a fastening nut is threadedly connected to the lower side of the outer wall of the valve stem near the lower side of the lower rubber valve disc, and the fastening nut limits the lower rubber valve disc, a spring is sleeved on the outer wall of the valve stem near the upper side of the lower rubber valve disc, and two ends of the spring are respectively in contact with the lower rubber valve disc and the valve body support seat.

[0014] Preferably, a movable rubber flap door is provided on the right inner wall of the pump body, and the rubber flap door is located on the right end face of the guide tube inlet pipe and is fixed against the pipe mouth. An O-ring is provided between the pump body and the rear cover body. An exhaust bolt is threadedly connected to the upper side of the pump body, and the exhaust bolt is connected to the upper side of the cavity. A drain bolt is threadedly connected to the lower side of the pump body, and the drain bolt is connected to the lower side of the cavity.

[0015] Preferably, the water outlet pipe is installed on the output end of the pump body, and the water outlet pipe is communicated with the output end of the pump body, and the suction pipe is installed on the input end of the pump body, and the suction pipe is communicated with the input end of the pump body.

[0016] Preferably, a water retaining ring is sleeved on the outer wall of the motor shaft of the motor, and the water retaining ring is located inside the umbrella-shaped connecting seat of the motor.

[0017] Compared with the prior art, the utility model provides an internally immersed high-lift stainless steel self-priming pump, which has the following beneficial effects:

[0018] 1. The utility model has an immersion structure, and by configuring a plurality of reflux check valves and multi-stage impellers and guide components, the lift of the stainless steel self-priming pump is increased, the efficiency of the pump is improved, and the self-priming time of the pump is shortened. At the same time, the utility model also reduces the production cost.

[0019] 2. When the water pressure in the cavity of the pump body of the utility model reaches a certain value, the two rubber valve plates in the valve body of the reflux check valve are closed at the same time (the two rubber valve plates are designed to ensure the reliability and durability of the self-priming function of the pump) under the action of the water pressure, blocking the cavity water from flowing back to the first guide component through the reflux check valve. At this time, the output of the self-priming pump has no loss and the output efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a structural schematic diagram of an internally immersed high-lift stainless steel self-priming pump proposed by the utility model;

[0022] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the main body of an internally immersed high-lift stainless steel self-priming pump;

[0023] Figure 3 It is a right view structural diagram of the main body of the internally immersed high-lift stainless steel self-priming pump;

[0024] Figure 4 for Figure 2 A schematic diagram of the enlarged structure of part A;

[0025] In the figure: 1, motor; 2, water retaining ring; 3, mechanical seal; 4, rear cover; 5, O-ring; 6, fifth guide component; 7, guide tube gland fastener; 8, fourth guide component; 9, third guide component; 10, impeller; 11, second guide component; 12, first guide component; 13, guide tube gland body; 14, pump body; 15, guide tube inlet pipe bracket; 16, guide tube inlet pipe; 17, rubber flap door; 18, impeller fastening nut; 19, spring washer; 20, cavity; 21, the first 1. Shaft sleeve; 22. Second shaft sleeve; 23. Sliding bearing inner sleeve; 24. Third shaft sleeve; 25. Fourth shaft sleeve; 26. Mechanical seal gasket; 27. Screw; 28. Drain bolt; 29. ​​Exhaust bolt; 30. Fastening nut; 31. Upper rubber valve disc; 32. Valve body support seat; 33. Lower rubber valve disc; 34. Valve stem; 35. Spring; 36. Valve body; 100. Internally immersed high-lift stainless steel self-priming pump body; 200. Water tank; 300. Suction pipe; 400. Water outlet pipe; 500. Butterfly valve. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-4 The utility model provides an internally immersed high-lift stainless steel self-priming pump, comprising an internally immersed high-lift stainless steel self-priming pump body 100, a water pool 200, a suction pipe 300, a water outlet pipe 400 and a butterfly valve 500. The input end of the internally immersed high-lift stainless steel self-priming pump body 100 is provided with a suction pipe 300, and the other end of the suction pipe 300 extends into the water pool 200. The output end of the internally immersed high-lift stainless steel self-priming pump body 100 is provided with a water outlet pipe 400, and a butterfly valve 500 is provided on the water outlet pipe 400.

[0028] The main body 100 of the internally immersed high-lift stainless steel self-priming pump comprises a motor 1, a pump body 14, an impeller 10, a flow guide assembly, a rear cover body 4, a mechanical seal 3 and a sleeve assembly. The right outer wall of the motor shaft of the motor 1 is sleeved with the rear cover body 4, and a mechanical seal 3 is arranged between the rear cover body 4 and the outer wall of the motor shaft of the motor 1. A mechanical seal gasket 26 is sleeved on the right outer wall of the motor shaft of the motor 1. The outer wall of the motor shaft of the motor 1 is sleeved with a sleeve assembly near the right side of the mechanical seal gasket 26. A plurality of impellers 10 are provided, and a mechanical sealing gasket 26, a sleeve assembly and a plurality of impellers 10 are fixed on the outer wall of the motor shaft of the motor 1 through an impeller fastening nut 18 and a spring washer 19. A flow guide assembly is provided on the right end face of the rear cover body 4, and the plurality of impellers 10 are located inside the flow guide assembly. Through the mutual cooperation of the plurality of impellers 10 and the flow guide assembly, the function of connecting a plurality of water pumps in series is realized, and the head is superimposed and improved. A pump body 14 is installed on the right side of the motor 1 through a screw 27, and the flow guide assembly is located inside the pump body 14.

[0029] An annular cylindrical cavity 20 is formed between the flow guide assembly and the pump body 14 . The upper space of the cavity 20 is a gas-liquid separation chamber, and the lower space of the cavity 20 is a liquid storage chamber.

[0030] To facilitate assembly and disassembly, the sleeve assembly includes a first sleeve 21, a second sleeve 22, a sliding bearing inner sleeve 23, a third sleeve 24, and a fourth sleeve 25. The first sleeve 21, the second sleeve 22, the sliding bearing inner sleeve 23, the third sleeve 24, and the fourth sleeve 25 are arranged on the outer wall of the motor shaft of the motor 1 in order from right to left. The sleeve assembly facilitates the assembly and connection of the guide assembly, and also facilitates the adjustment of the guide assembly.

[0031] In order to make the liquid and gas flow in an orderly manner, the guide component includes a fifth guide component 6, a guide tube gland fastener 7, a fourth guide component 8, a third guide component 9, a second guide component 11, a first guide component 12, a guide tube gland body 13, a guide tube inlet pipe bracket 15, a guide tube inlet pipe 16 and a reflux check valve. The fourth guide component 8 is arranged on the right side of the fifth guide component 6, the third guide component 9 is arranged on the right side of the fourth guide component 8, the second guide component 11 is arranged on the right side of the third guide component 9, the first guide component 12 is arranged on the right side of the second guide component 11, and a plurality of reflux check valves are arranged inside the first guide component 12, which can realize the self-priming function of the multi-stage centrifugal pump and shorten the self-priming time. The right side of the first guide component 12 is provided with a guide The flow tube pressure cover body 13, the number of the flow tube pressure cover fasteners 7 is two, and the two flow tube pressure cover fasteners 7 are arranged on the upper and lower sides of the right end surface of the rear cover body 4, and the flow tube pressure cover body 13 is fixed by the two flow tube pressure cover fasteners 7, the right side of the flow tube pressure cover body 13 is installed with a flow tube inlet pipe 16 through a flow tube inlet pipe bracket 15, and an O-ring 5 is provided between the left outer part of the flow tube inlet pipe 16, the right side outer wall of the flow tube pressure cover body 13 and the inner wall of the flow tube inlet pipe bracket 15, the right side outer wall of the flow tube inlet pipe 16 is fixedly connected to the right side inner wall of the pump body 14 through the flow tube inlet pipe bracket 15, and an O-ring 5 is provided between the right side outer wall of the flow tube inlet pipe 16, the right side inner wall of the pump body 14 and the inner wall of the flow tube inlet pipe bracket 15.

[0032] The reflux check valve comprises a fastening nut 30, an upper rubber valve disc 31, a valve body support seat 32, a lower rubber valve disc 33, a valve stem 34, a spring 35 and a valve body 36. A valve body support seat 32 is provided on the inner upper side of the valve body 36. A longitudinal valve stem 34 is slidably connected to the middle inner part of the valve body support seat 32. An upper rubber valve disc 31 is mounted on the top of the valve stem 34 through two fastening nuts 30. The two fastening nuts 30 are located on the upper and lower sides of the upper rubber valve disc 31. A lower rubber valve disc 33 is provided on the lower outer wall of the valve stem 34. A fastening nut 30 is threadedly connected to the lower side of the outer wall of the valve stem 34 near the lower side of the lower rubber valve disc 33. The fastening nut 30 limits the lower rubber valve disc 33. A spring 35 is sleeved on the outer wall of the valve stem 34 near the upper side of the lower rubber valve disc 33. The two ends of the spring 35 are respectively in contact with the lower rubber valve disc 33 and the valve body support seat 32. Liquid can flow better through the flow guide component.

[0033] In order to facilitate the circulation and discharge of gases and liquids, a movable rubber flap door 17 is provided on the right inner wall of the pump body 14, and the rubber flap door 17 is located on the right end face of the guide tube inlet pipe 16 and is fixed against the pipe mouth. An O-ring 5 is provided between the pump body 14 and the rear cover body 4. An exhaust bolt 29 is threadedly connected to the upper side of the pump body 14, and the exhaust bolt 29 is communicated with the upper side of the cavity 20. A drain bolt 28 is threadedly connected to the lower side of the pump body 14, and the drain bolt 28 is communicated with the lower side of the cavity 20. Through the pump body 14, the flow output can be better, and the circulation and discharge of gases and liquids are also convenient.

[0034] In order to facilitate the output of liquid, the water outlet pipe 400 is installed on the output end of the pump body 14, and the water outlet pipe 400 is connected to the output end of the pump body 14. The suction pipe 300 is installed on the input end of the pump body 14, and the suction pipe 300 is connected to the input end of the pump body 14. The flow of liquid is facilitated by the water outlet pipe 400, the pump body 14 and the suction pipe 300.

[0035] In order to protect the motor 1, a water retaining ring 2 is sleeved on the outer wall of the motor shaft of the motor 1, and the water retaining ring 2 is located inside the umbrella-shaped connecting seat of the motor 1, which can provide good protection when liquid leaks from the pump body.

[0036] The working principle and use process of the utility model are as follows: first, when the self-priming pump is started for the first time, water is filled into the pump body 14 through the exhaust port of the pump body 14 or the water outlet of the water pump.

[0037] The water injected into the pump body 14 enters the cavity of the first guide component 12 through the reflux check valve on the first guide component 12, and then flows into the next-level guide component and the impeller 10 inlet through the impeller 10 inlet until the entire string of guide components (including the impeller 10) is filled with water. At the same time, the cavity 20 of the pump body 14 (the upper part is the gas-liquid separation chamber, and the lower part is the liquid storage chamber) is full of water, and the rubber flap door of the water inlet is closed.

[0038] After the pump is started, the water in the cavity 20 of the pump body 14 flows back to the cavity of the first guide component 12 to the inlet of the impeller 10 through the reflux check valve, and the gas and liquid are mixed in the impeller 10, and then discharged to the water outlet of the cavity 20 of the pump body 14 by the multi-stage impeller 10 and the guide component (at the same time, the rubber flap door of the water inlet of the pump body 14 opens automatically), and the gas and liquid are separated in the gas-water separation chamber, and the gas is discharged upward through the pump outlet, and the liquid flows back to the lower part of the cavity 20 of the pump body 14 (liquid storage chamber), and then flows back to the cavity of the first guide component 12 to the inlet of the impeller 10 through the reflux check valve, and the cycle is repeated until the gas in the pump body 14 and the pipeline is exhausted and the pump works normally.

[0039] During this process, when the water pressure in the cavity 20 of the pump body 14 reaches a certain value, the reflux check valve is acted upon by the water pressure (the first guide component 12 is the negative pressure of the buffer area of ​​the suction port of the impeller 10), and the two rubber valve plates in the valve body are closed at the same time, blocking the cavity water from flowing back to the first guide component 12 (i.e., the suction port of the impeller 10) through the reflux check valve. At this time, there is no output loss of the self-priming pump, and the output efficiency is improved.

[0040] When the pump is shut down, water does not flow at the suction port of the impeller 10, the rubber flap door at the water inlet of the pump body 14 automatically resumes closing, the water in the outlet pipe and the cavity flows back, the reflux check valve automatically opens (the water pressure difference disappears), and the water in the cavity 20 of the pump body 14 flows into the first guide component 12 through the reflux check valve on the first guide component 12, and then flows into the next-level guide component and the impeller 10 inlet through the impeller 10 inlet, until the water in the cavity is balanced with the horizontal plane in the entire string of guide components (including the impeller 10), waiting for the next startup.

[0041] Although the 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. An internally immersed high-lift stainless steel self-priming pump, comprising an internally immersed high-lift stainless steel self-priming pump body (100), a water tank (200), a suction pipe (300), a water outlet pipe (400) and a butterfly valve (500), characterized in that: The input end of the internally immersed high-lift stainless steel self-priming pump body (100) is provided with a suction pipe (300), and the other end of the suction pipe (300) extends deep into the water pool (200); the output end of the internally immersed high-lift stainless steel self-priming pump body (100) is provided with a water outlet pipe (400), and a butterfly valve (500) is provided on the water outlet pipe (400); The main body (100) of an internally immersed high-lift stainless steel self-priming pump comprises a motor (1), a pump body (14), an impeller (10), a flow guide assembly, a rear cover body (4), a mechanical seal (3) and a shaft sleeve assembly. The rear cover body (4) is sleeved on the right outer wall of the motor shaft of the motor (1), and a mechanical seal (3) is arranged between the rear cover body (4) and the outer wall of the motor shaft of the motor (1). A mechanical seal gasket (26) is sleeved on the right outer wall of the motor shaft of the motor (1). The outer wall of the motor shaft of the motor (1) is sleeved on the right side of the mechanical seal gasket (26). The shaft sleeve assembly is sleeved on the right side of the outer wall of the motor shaft of the motor (1) near the mechanical seal gasket (26). A plurality of impellers (10) are provided on the sleeve assembly, and a mechanical sealing gasket (26), a shaft sleeve assembly and the plurality of impellers (10) are fixed to the outer wall of the motor shaft of the motor (1) through an impeller fastening nut (18) and a spring washer (19); a flow guide assembly is provided on the right end face of the rear cover body (4), and the plurality of impellers (10) are located inside the flow guide assembly, and the plurality of impellers (10) and the flow guide assembly cooperate with each other to realize the function of connecting a plurality of water pumps in series, and the head is increased by superposition; a pump body (14) is installed on the right side of the motor (1) through a screw (27), and the flow guide assembly is located inside the pump body (14); An annular cylindrical cavity (20) is formed between the flow guide component and the pump body (14); the upper space of the cavity (20) is a gas-liquid separation chamber, and the lower space of the cavity (20) is a liquid storage chamber.

2. The internally immersed high-lift stainless steel self-priming pump according to claim 1 is characterized in that: The shaft sleeve assembly comprises a first shaft sleeve (21), a second shaft sleeve (22), a sliding bearing inner sleeve (23), a third shaft sleeve (24), and a fourth shaft sleeve (25); the first shaft sleeve (21), the second shaft sleeve (22), the sliding bearing inner sleeve (23), the third shaft sleeve (24), and the fourth shaft sleeve (25) are sleeved on the outer wall of the motor shaft of the electric motor (1) in order from right to left.

3. The internally immersed high-lift stainless steel self-priming pump according to claim 2 is characterized in that: The flow guide assembly comprises a fifth flow guide component (6), a flow guide tube gland fastener (7), a fourth flow guide component (8), a third flow guide component (9), a second flow guide component (11), a first flow guide component (12), a flow guide tube gland body (13), a flow guide tube inlet pipe bracket (15), a flow guide tube inlet pipe (16) and a reflow check valve. The fourth flow guide component (8) is arranged on the right side of the fifth flow guide component (6), the third flow guide component (9) is arranged on the right side of the fourth flow guide component (8), the second flow guide component (11) is arranged on the right side of the third flow guide component (9), the first flow guide component (12) is arranged on the right side of the second flow guide component (11), a plurality of reflow check valves are arranged inside the first flow guide component (12) and can realize the self-priming function of the multi-stage centrifugal pump and shorten the self-priming time, and the flow guide tube gland is arranged on the right side of the first flow guide component (12). The guide tube gland fasteners (7) are two in number, and the two guide tube gland fasteners (7) are arranged on the upper and lower sides of the right end surface of the rear cover body (4), and the guide tube gland body (13) is fixed by the two guide tube gland fasteners (7), the right side of the guide tube gland body (13) is equipped with a guide tube inlet pipe (16) through a guide tube inlet pipe bracket (15), and the left side of the guide tube inlet pipe (16) is provided with a guide tube inlet pipe bracket (15). An O-ring (5) is provided between the right side outer wall of the guide tube gland body (13) and the inner wall of the guide tube inlet pipe bracket (15); the right side outer wall of the guide tube inlet pipe (16) is fixedly connected to the right side inner wall of the pump body (14) through the guide tube inlet pipe bracket (15); and an O-ring (5) is provided between the right side outer wall of the guide tube inlet pipe (16), the right side inner wall of the pump body (14) and the inner wall of the guide tube inlet pipe bracket (15).

4. The internally immersed high-lift stainless steel self-priming pump according to claim 3 is characterized in that: The reflux check valve comprises a fastening nut (30), an upper rubber valve disc (31), a valve body support seat (32), a lower rubber valve disc (33), a valve stem (34), a spring (35) and a valve body (36). The valve body support seat (32) is provided on the upper inner side of the valve body (36). A longitudinal valve stem (34) is slidably connected to the middle inner part of the valve body support seat (32). The upper rubber valve disc (31) is mounted on the top of the valve stem (34) via two fastening nuts (30). The two fastening nuts (30) are connected to the valve body support seat (32). ) are located at the upper and lower sides of the upper rubber valve disc (31); a lower rubber valve disc (33) is provided on the lower outer wall of the valve stem (34); a fastening nut (30) is threadedly connected to the lower side of the outer wall of the valve stem (34) near the lower side of the lower rubber valve disc (33); and the fastening nut (30) limits the lower rubber valve disc (33); a spring (35) is sleeved on the upper side of the outer wall of the valve stem (34) near the lower rubber valve disc (33); and two ends of the spring (35) are respectively in contact with the lower rubber valve disc (33) and the valve body support seat (32).

5. The internally immersed high-lift stainless steel self-priming pump according to claim 3 is characterized in that: The right inner wall of the pump body (14) is provided with a movable rubber flap door (17), and the rubber flap door (17) is located on the right end surface of the guide tube inlet pipe (16) and is fixed against the pipe mouth. An O-ring (5) is provided between the pump body (14) and the rear cover body (4). The upper side of the pump body (14) is threadedly connected with an exhaust bolt (29), and the exhaust bolt (29) is communicated with the upper side of the cavity (20). The lower side of the pump body (14) is threadedly connected with a drain bolt (28), and the drain bolt (28) is communicated with the lower side of the cavity (20).

6. The internally immersed high-lift stainless steel self-priming pump according to claim 1 is characterized in that: The water outlet pipe (400) is installed on the output end of the pump body (14), and the water outlet pipe (400) is communicated with the output end of the pump body (14); the suction pipe (300) is installed on the input end of the pump body (14), and the suction pipe (300) is communicated with the input end of the pump body (14).

7. The internally immersed high-lift stainless steel self-priming pump according to claim 1 is characterized in that: A water retaining ring (2) is sleeved on the outer wall of the motor shaft of the motor (1), and the water retaining ring (2) is located inside the umbrella-shaped connecting seat of the motor (1).

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