In-line pump structure

Abstract

A kind of tube in pump structure, including a set of shell, a pump, an outer exhaust valve and an inner exhaust valve, wherein the set of shell has an upper outlet, the upper outlet interior is provided with an extension pipe, the top surface of the set of shell is provided with an outer exhaust hole, the circumferential surface of the extension pipe is provided with an inner exhaust hole, the pump includes an impeller group and a driving motor, the impeller group is combined with the lower end of the extension pipe, the driving motor is arranged below the impeller group, the outer exhaust valve is arranged on the top surface of the set of shell, the outer exhaust hole can be manually opened or closed, the inner exhaust valve is arranged on the circumferential surface of the extension pipe, the inner exhaust hole can be automatically opened when the water level in the extension pipe is lower than the inner exhaust hole, the inner exhaust hole can be automatically closed when the water level in the extension pipe is higher than the inner exhaust hole;Thus the overall service life can be greatly improved.

Description

Technical Field

[0001] This utility model relates to a technical field concerning the structure of a pipe-in-pump, specifically to a pipe-in-pump structure that can expel air from the pump when restarting pumping, so as to facilitate the pumping of water into the pump and avoid the impeller spinning dry and causing the drive motor to burn out, thereby greatly improving the overall service life of the pipe-in-pump structure. Background Technology

[0002] A typical existing in-pipe pump structure, as shown in Taiwan Patent Application No. 107105027, mainly consists of a pump housed within a casing, with the upper end of the pump connected to the upper outlet of the casing. Another pump structure, as shown in Taiwan Utility Model Patent Application No. 100206810, primarily includes an impeller assembly and a drive motor located below the impeller assembly. The impeller assembly contains multiple impellers, and multiple water inlets are located between the impeller assembly and the drive motor. The drive motor drives the multiple impellers to rotate. Thus, when water enters the casing through the lower outlet, the drive motor drives the multiple impellers to rotate, drawing water from the casing into the impeller assembly through the multiple water inlets. The water is then pushed upwards layer by layer by the impellers until it is delivered from the upper outlet of the casing to a water storage device (such as a water tower, water tank, etc.), thereby achieving the purpose of transporting water to the water storage device.

[0003] However, based on hygiene and safety requirements, the water storage device and its pipelines need to be cleaned or maintained every once in a while. When the water storage device and its pipelines are cleaned or maintained, the water in the water storage device, the in-pipe pump and the connected pipelines must be completely drained. Only after the cleaning or maintenance is completed will water be injected again from the outlet at the lower end of the casing of the in-pipe pump, and then the pump will pump the water into the water storage device. To prevent backflow of water, a check valve is installed in the pipeline between the in-line pump and the water storage device. The pressure in the pipeline causes the check valve to close with considerable pressure. Therefore, when water is injected again from the outlet at the lower end of the casing of the in-line pump and pumped upwards, the air in the impeller assembly will be blocked by the closed check valve in the pipeline, preventing water from entering the impeller assembly from the multiple inlets. As a result, the multiple impellers will run dry due to the lack of water entering the impeller assembly, which can easily cause the drive motor to burn out. This significantly shortens the service life of the in-line pump, and also affects working efficiency and increases maintenance costs.

[0004] In view of this, the inventor has deeply conceived and actively researched and improved the invention to address the aforementioned problems, and has developed this utility model. Utility Model Content

[0005] The main purpose of this utility model is to effectively solve the problem that in the existing in-pipe pump structure, when the pumping is restarted after cleaning or maintenance, the air in the impeller assembly will prevent water from entering, causing the multiple impellers to spin idly, which will lead to the burnout of the drive motor, thus greatly shortening the overall service life, affecting work efficiency and increasing maintenance costs.

[0006] This utility model provides a pipe-in-pump structure, including a casing, a pump, an external vent valve, and an internal vent valve. The casing has an upper outlet and a lower outlet. An extension pipe is connected downwards inside the upper outlet. The top surface of the casing has an external vent hole, and the circumferential surface of the extension pipe has an internal vent hole. The pump includes an impeller assembly and a drive motor. The impeller assembly is connected to the lower end of the extension pipe and contains multiple impellers. The drive motor is located below the impeller assembly and drives the multiple impellers to rotate. Multiple water inlets are provided between the impeller assembly and the drive motor. The external vent valve is located on the top surface of the casing and can be manually opened or closed. The internal vent valve is located on the outer circumferential surface of the extension pipe. When the water level in the extension pipe is lower than the internal vent hole, the internal vent hole automatically opens to allow air from the pump to be discharged into the casing through the extension pipe. When the water level in the extension pipe is higher than the internal vent hole, the internal vent hole automatically closes.

[0007] The in-pipe pump structure disclosed in this utility model allows air in the impeller assembly of the pump to be discharged to the outside through the internal and external exhaust valves when the water storage device and its pipeline are restarted for cleaning or maintenance. As a result, water entering the casing can be easily drawn into the impeller assembly through the multiple inlets, thus preventing the multiple impellers of the impeller assembly from running dry. This avoids the burnout of the drive motor, thereby significantly extending the overall service life, saving maintenance costs and improving work efficiency. Attached Figure Description

[0008] Figure 1 This is a three-dimensional cross-sectional structural diagram of the present invention.

[0009] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0010] Figure 3 This is a schematic diagram of air emission according to the present invention.

[0011] Figure 4 This is a schematic diagram of the upward water pumping of this utility model.

[0012] Figure 5 This is a partially enlarged schematic diagram of another embodiment of the present invention.

[0013] Figure 6This is a schematic diagram of air emission according to another embodiment of the present invention.

[0014] Figure 7 This is a schematic diagram of water pumping upwards according to another embodiment of the present invention.

[0015] Symbol explanation:

[0016] 10: Shell

[0017] 11: Upper Exit

[0018] 12: Lower Exit

[0019] 13: Extension tube

[0020] 14: External exhaust port

[0021] 15: Internal exhaust port

[0022] 20: Pump

[0023] 21: Impeller assembly

[0024] 22: Drive motor

[0025] 23:Water inlet

[0026] 30: External exhaust valve

[0027] 31: Valve seat

[0028] 32: Valve plug

[0029] 33: Polygonal Column

[0030] 40: Internal exhaust valve

[0031] 41: base body

[0032] 42: Connecting sleeve

[0033] 420: Combined with a chamber

[0034] 421: Through hole

[0035] 43: Valve sleeve

[0036] 430: Activity Room

[0037] 431: Perforation

[0038] 44: Valve ball Detailed Implementation

[0039] Please see Figures 1 to 4 The diagram shows the in-pipe pump structure of this utility model, including a housing 10, a pump 20, an external exhaust valve 30, and an internal exhaust valve 40, wherein:

[0040] The casing 10 has an upper outlet 11 and a lower outlet 12. An extension pipe 13 is connected downward inside the upper outlet 11. An external vent 14 is provided on the top surface of the casing 10. An internal vent 15 is provided on the circumferential surface of the extension pipe 13. The upper outlet 11 can be connected to a water storage device and its pipeline. The lower outlet 12 allows water to enter the casing 10.

[0041] The pump 20 includes an impeller assembly 21 and a drive motor 22. The impeller assembly 21 is attached to the lower end of the extension pipe 13 and has multiple impellers (not shown). The drive motor 22 is located below the impeller assembly 21 and can drive the multiple impellers to rotate. Multiple water inlets 23 are provided between the impeller assembly 21 and the drive motor 22.

[0042] The external vent valve 30 is located on the top surface of the housing 10 and can be manually opened or closed for the external vent hole 14. The external vent valve 30 includes a valve seat 31 and a valve plug 32. The valve seat 31 is annular and its lower end is welded to the area around the external vent hole 14 on the top surface of the housing 10. The valve seat 31 has internal threads on its inner circumferential surface. The valve plug 32 has external threads on its outer circumferential surface, allowing it to be screwed into the valve seat 31. The top of the valve plug 32 has a polygonal post 33 for easy clamping and rotation with a tool. When the valve plug 32 is loosened, a gap is created, allowing air in the housing 10 to escape through the external vent hole 14. When the valve plug 32 is tightened, a good sealing effect is achieved, completely closing the external vent hole 14. In this embodiment, the polygonal post 33 is a quadrilateral post.

[0043] The internal vent valve 40 is located on the outer circumferential surface of the extension pipe 13. When the water level in the extension pipe 13 is lower than the internal vent hole 15, the internal vent hole 15 is automatically opened to allow air in the impeller assembly 21 of the pump 20 to be discharged into the housing 10 through the extension pipe 13. When the water level in the extension pipe 13 is higher than the internal vent hole 15, the internal vent hole 15 is automatically closed. The internal vent valve 40 includes a seat 41, a connecting sleeve 42, a valve sleeve 43, and a valve ball 44. The seat 41 is annular and its lower end is welded to the area around the internal vent hole 15 on the outer circumferential surface of the extension pipe 13. The inner circumferential surface of the seat 41 is provided with internal threads. The outer circumferential surface of the inner end of the connecting sleeve 42 is provided with an external thread for screwing into the seat 41. The outer end face has a mating chamber 420, the inner circumferential surface of which is provided with an internal thread. The inner end face of the connecting sleeve 42 has a through hole 421 extending into the mating chamber 420. The outer circumferential surface of the valve sleeve 43 is provided with an external thread for screwing into the mating chamber 420. The inner end face of the valve sleeve 43 has a movable chamber 430, and the outer end face has a through hole 431 extending into the movable chamber 430. The valve bead 44 is movably disposed in the movable chamber 430, and its outer diameter is larger than the diameter of the through hole 421 and the through hole 431. When the water level in the extension pipe 13 is lower than the internal vent hole 15, the valve bead 44 does not block the through hole 431 due to gravity. When the water level in the extension pipe 13 is higher than the internal vent hole 15, the valve bead 44 will be pushed by the water and block the through hole 431.

[0044] exist Figure 3 The text indicates that before restarting the pump 20 after cleaning or maintenance of the water storage device and its pipelines, the valve plug 32 of the external vent valve 30 can be loosened first. Then, when the pump 20 is turned on and the drive motor 22 drives the multiple impellers in the impeller assembly 21 to rotate, the air in the impeller assembly 21 can be discharged from the extension pipe 13 through the internal vent hole 15, the through hole 421, the movable chamber 430 and the perforation 431 into the casing 10. The air in the casing 10 will be discharged to the outside through the gap between the valve seat 31 and the valve plug 32. In this way, the water in the casing 10 can be easily drawn into the impeller assembly 21 from the multiple water inlets 23 and then pumped into the extension pipe 13.

[0045] exist Figure 4 The document states that when the air in the housing 10 is discharged to the outside, the valve plug 32 of the external vent valve 30 can be tightened. When the water level in the extension pipe 13 reaches the internal vent hole 15, water will flow from the internal vent hole 15 through the through hole 421 into the movable chamber 430, and then push the valve ball 44 to block the through hole 431. After that, the water in the extension pipe 13 will be sent out from the upper outlet 11 of the housing 10 to the upper pipeline to open the check valve therein, and then sent to a water storage device.

[0046] Please see Figures 5 to 7 As shown, this is another embodiment of the in-pipe pump structure of the present invention. Its structure is roughly the same as the above embodiment. The difference is that the internal exhaust valve 40 in this embodiment does not include the connecting sleeve 42, and the valve sleeve 43 is directly screwed onto the seat 41. The outer diameter of the valve ball 44 is larger than the diameter of the internal exhaust hole 15 and the through hole 431.

[0047] exist Figure 6 The text indicates that before restarting the pump 20 after cleaning or maintenance of the water storage device and its pipelines, the valve plug 32 of the external vent valve 30 can be loosened first. Then, when the pump 20 is turned on and the drive motor 22 drives the multiple impellers in the impeller assembly 21 to rotate, the air in the impeller assembly 21 can be discharged from the extension pipe 13 through the internal vent hole 15, the movable chamber 430 and the perforation 431 into the casing 10. The air in the casing 10 will be discharged to the outside through the gap between the valve seat 31 and the valve plug 32. In this way, the water in the casing 10 can be easily drawn into the impeller assembly 21 from the multiple water inlets 23 and then pumped into the extension pipe 13.

[0048] exist Figure 7 The document states that when the air in the housing 10 is discharged to the outside, the valve plug 32 of the external vent valve 30 can be tightened. When the water level in the extension pipe 13 reaches the internal vent hole 15, water will flow into the movable chamber 430 through the internal vent hole 15, and then push the valve ball 44 to block the perforation 431. After that, the water in the extension pipe 13 will be sent out from the upper outlet 11 of the housing 10 to the upper pipeline to open the check valve therein, and then sent to a water storage device.

[0049] Thus, when the water storage device and its pipeline are restarted due to cleaning or maintenance, the air in the impeller assembly 21 of the pump 20 can be discharged to the outside through the internal exhaust valve 40 and the external exhaust valve 30. Therefore, the water entering the casing 10 can be easily drawn into the impeller assembly 21 through the multiple water inlets 23, so that the multiple impellers of the impeller assembly 21 will not run dry. This can prevent the drive motor 22 from burning out, thereby greatly extending the overall service life, saving maintenance costs and improving work efficiency.

Claims

1. A pipe-in-pump structure, comprising: A housing with an upper outlet and a lower outlet, an extension tube connected downward inside the upper outlet, an external vent on the top surface of the housing, and an internal vent on the circumferential surface of the extension tube. A pump, comprising an impeller assembly and a drive motor, wherein the impeller assembly is connected to the lower end of the extension tube and has multiple impellers inside, and the drive motor is located below the impeller assembly and can drive the multiple impellers to rotate, and multiple water inlets are provided between the impeller assembly and the drive motor. An external vent valve, located on the top surface of the housing, allows for manual opening or closing of the external vent port; and An internal vent valve is provided on the outer circumferential surface of the extension pipe. When the water level in the extension pipe is lower than the internal vent hole, the internal vent hole can be automatically opened to allow air in the pump to be discharged into the casing through the extension pipe. When the water level in the extension pipe is higher than the internal vent hole, the internal vent hole can be automatically closed.

2. The in-pipe pump structure as described in claim 1, characterized in that, The external vent valve includes a valve seat and a valve plug. The valve seat is annular and its lower end is welded to the periphery of the external vent hole on the top surface of the housing. The inner circumferential surface of the valve seat is provided with internal threads, and the outer circumferential surface of the valve plug is provided with external threads for screwing into the valve seat. The top of the valve plug has a polygonal post for easy clamping and rotation with a tool. When the valve plug is loosened, a gap is created to allow air in the housing to be discharged through the external vent hole. When the valve plug is tightened, it provides a good sealing effect, completely sealing the external vent hole.

3. The in-pipe pump structure as described in claim 1 or 2, characterized in that, The internal vent valve comprises a seat, a connecting sleeve, a valve sleeve, and a valve ball. The seat is annular and its lower end is welded to the periphery of the internal vent hole on the outer circumference of the extension tube. The inner circumferential surface of the seat has an internal thread, and the outer circumferential surface of the inner end of the connecting sleeve has an external thread for screwing into the seat. The outer end face has a mating chamber, the inner circumferential surface of which has an internal thread. The inner end face of the connecting sleeve has a through hole extending into the mating chamber. The outer circumferential surface of the valve sleeve... The valve sleeve has an external thread for screwing into the connecting chamber. The inner end face of the valve sleeve has a movable chamber, and the outer end face has a through hole that extends into the movable chamber. The valve ball is movably disposed in the movable chamber, and its outer diameter is larger than the diameter of the through hole and the through hole. When the water level in the extension pipe is lower than the internal vent hole, the valve ball does not block the through hole due to gravity. When the water level in the extension pipe is higher than the internal vent hole, the valve ball will be pushed by the water and block the through hole.

4. The in-pipe pump structure as described in claim 1 or 2, characterized in that, The internal vent valve includes a seat, a valve sleeve, and a valve ball. The seat is annular and its lower end is welded to the periphery of the internal vent hole on the outer circumference of the extension pipe. The inner circumference of the seat has an internal thread, and the outer circumference of the valve sleeve has an external thread for screwing into the seat. The inner end face of the valve sleeve has a movable chamber, and the outer end face has a through hole that extends into the movable chamber. The valve ball is movably disposed in the movable chamber, and its outer diameter is larger than the diameter of the internal vent hole and the through hole. When the water level in the extension pipe is lower than the internal vent hole, the valve ball does not block the through hole due to gravity. When the water level in the extension pipe is higher than the internal vent hole, the valve ball is pushed by the water and blocks the through hole.

5. The in-pipe pump structure as described in claim 2, characterized in that, The polygonal column is a quadrilateral column.

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