CN213979258U - External small-size domestic sewage of motor promotes pump station - Google Patents
External small-size domestic sewage of motor promotes pump station Download PDFInfo
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- CN213979258U CN213979258U CN202022967045.XU CN202022967045U CN213979258U CN 213979258 U CN213979258 U CN 213979258U CN 202022967045 U CN202022967045 U CN 202022967045U CN 213979258 U CN213979258 U CN 213979258U
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Abstract
The utility model provides an external small-size domestic sewage of motor promotes pump station, including controller, level gauge, header tank and water pump assembly, the header tank sets up water inlet, delivery port and blow vent, water pump assembly includes the motor and the pump body, the embedded installation of the pump body is on the delivery port of header tank, the motor is located the header tank outside and with pump body connection, the sunction inlet of the pump body is in the header tank, the discharge port of the pump body is located the header tank outside and is connected with the check valve, the pump body is being close to the discharge port side and is being located the part of header tank and is equipped with the flushing hole, the controller is connected with level gauge and motor respectively, the level gauge extends to in the header tank. Can be with the water behind the partial pump body lifting pressure by the washing hole blowout, wash in the header tank, can greatly reduced impurity adhere to, improve pump station efficiency, prevent to block up and cause sewage to spill over.
Description
Technical Field
The utility model relates to a sewage discharge equipment technical field, in particular to small-size domestic sewage lifting pump station of motor external type.
Background
In some occasions, sewage can not flow into the municipal sewage pipe by gravity, such as underground space areas of villas, clubs, markets and the like. Taking a villa as an example, as the living quality of people is improved, more and more people choose to live in the villa; people can carry out daily activities such as lavatory, bathing, laundry in the basement of villa to produce domestic sewage, because municipal sewage pipes are higher than the basement, so these sewage can't flow in municipal sewage pipes naturally, so need set up special equipment and be used for promoting sewage and make its flow in municipal sewage pipes, and this equipment must keep stable efficient work for a long time, still need avoid the production of peculiar smell and leakage as far as at the in-process of sewage collection and emission.
Patent document CN 205444429U discloses a single-pump sewage lifting pump station, which comprises a tank and a pump arranged on the tank, wherein the tank is provided with a water inlet, a water outlet and an exhaust port, and the single-pump sewage lifting pump station further comprises a pressure sensing liquid level control device for controlling the pump to discharge water from the water outlet through the air pressure change in the tank. The air outlet is arranged to avoid that water cannot enter due to the fact that a closed space is formed in the box body, and the air outlet is preferably arranged to be relatively small, so that the air outlet is opened and closed without influencing the detection and judgment of the air pressure change in the box body by the air pressure sensing liquid level control device.
However, since the sewage contains more impurities and part of the impurities are sticky, the impurities are often attached to the surface of the tank body, the efficiency of a pump station is affected, blockage can be formed, and the overflow of the sewage is easily caused. The utility model discloses an external small-size domestic sewage of motor promotes pump station can solve this problem perfectly.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an external small-size domestic sewage of motor promotes pump station, including controller, level gauge, header tank and water pump assembly, the header tank sets up water inlet, delivery port and blow vent, water pump assembly includes the motor and the pump body, the pump body is embedded to be installed on the delivery port of header tank, the motor is located the header tank outside and with pump body connection, the sunction inlet of the pump body is in the header tank, the discharge port of the pump body is located the header tank outside and is connected with the check valve, the pump body is being close to the discharge port side and is being located the part of header tank and is equipped with the flushing hole, the controller is connected with level gauge and motor respectively, the level gauge extends to in the header tank.
Optionally, the liquid level meter adopts a pneumatic liquid level meter, the liquid level meter comprises a liquid level pipe and a pneumatic pipe, one end of the liquid level pipe extends into the water collection tank, the liquid level pipe is connected with the tank body of the water collection tank through threads, and the liquid level pipe and the tank body of the water collection tank are sealed through a sealing ring; one end of the liquid level pipe is positioned outside the water collecting tank and is in sealing connection with one end of the air pressure pipe, and the other end of the air pressure pipe is in sealing connection with the controller.
Optionally, the pump body is connected with the tank body of the water collecting tank through bolts, and a sealing gasket is arranged between the pump body and the tank body for sealing.
Optionally, the check valve includes check valve clack and check valve body, check valve clack installs in the check valve body, the discharge port adoption flange joint of check valve and the pump body.
Optionally, the controller is connected with a high-level float, and the high-level float is mounted at the top of the water collecting tank.
Optionally, the bottom surface of the water collecting tank is an inclined surface, and the lower end of the inclined surface is located on the suction port side of the pump body.
Optionally, the formula impeller is swept after the pump body is built-in half-open, sweep the formula impeller after half-open and include that the rim plate sweeps the formula blade after and a plurality of, the rim plate is circular and the center is equipped with the shaft hole, sweep the formula blade after and fix the same side of rim plate and evenly arrange around shaft hole circumference, sweep the end that the formula blade kept away from the shaft hole after and be equipped with the release recess.
Optionally, a flushing pipe is arranged outside the water collecting tank, one end of the flushing pipe extends into the water collecting tank and is in sealed connection with the tank body of the water collecting tank, and the other end of the flushing pipe is connected with the discharge port side of the pump body.
Optionally, the one end that the flushing pipe stretched into in the header tank is equipped with rotatory nozzle, rotatory nozzle includes fixed disk, rotary disk, first nozzle and second nozzle, the fixed disk is equipped with the tube hole with flushing pipe fixed connection, the rotary disk is connected with the fixed disk and can rotates around the fixed disk, first nozzle is the tangential with the rotary disk and is connected, the second nozzle is located the tangential inboard of first nozzle and is the right angle with first nozzle and be connected, rotary disk, first nozzle and second nozzle are in the plane with tube hole axis vertically.
Optionally, the water collection tank is made of polyethylene material, and the plurality of water inlets are arranged on the top surface and/or the side surface of the water collection tank; the air vent is arranged on the top surface of the water collecting tank.
The utility model discloses a pump station can help the customer to solve basement drainage problem. The water pump assembly, the water collecting tank and the check valve are integrated together, the structure is compact, and the occupied area is small. The whole set of pump station is totally sealed, has no leakage and no peculiar smell. The motor is exposed outside, the service life is long, and the maintenance is convenient. The liquid level meter measures the liquid level height in the water collecting tank in real time. The controller intelligently controls the water pump to start and stop, and the safe operation of the pump station is ensured. The part of the pump body close to the discharge port side and located in the water collecting tank is provided with a flushing hole, water after pressure of part of the pump body is lifted is sprayed out of the flushing hole to flush the interior of the water collecting tank, impurities can be greatly reduced to be attached, pump station efficiency is improved, and sewage overflow caused by blocking is prevented.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic perspective view of a small household sewage lifting pump station with an external motor according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of the small household sewage lifting pump station with an external motor according to the present invention, with the water pump assembly removed;
FIG. 3 is a schematic perspective view of a water pump assembly used in an embodiment of the small household sewage lifting pump station with an external motor of the present invention;
FIG. 4 is a schematic perspective view of a half-open back-sweeping impeller built in a pump body of a water pump assembly in an embodiment of the small household sewage lifting pump station with an external motor of the present invention;
FIG. 5 is a schematic plan view of a rotary sprayer installed at the inner end of a header tank for a washing pipe in an embodiment of a small-sized domestic sewage lifting pump station with an external motor.
In the figure: 1. a controller; 2. a liquid level meter; 3. a water collection tank; 4. a water pump assembly; 5. a water inlet; 6. a water outlet; 7. a vent; 8. a motor; 9. a pump body; 10. a check valve; 11. a liquid level tube; 12. a ventilated rubber connecting pipe; 13. a water inlet rubber connecting pipe; 14. a seal ring; 15. clamping a hoop; 16. anchor bolts; 17. a bolt; 18. a cable; 19. a pneumatic tube; 20. a gas pipe joint; 21. a high-level float; 22. a flush tube; 23. a flange; 24. a gasket; 25. a check valve flap; 26. a check valve body; 27. a half-open back-swept impeller; 28. a wheel disc; 29. a back swept blade; 30. a shaft hole; 31. releasing the groove; 32. rotating the spray head; 33. fixing the disc; 34. rotating the disc; 35. a first nozzle; 36. a second nozzle; 37. the tube hole.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in figure 1, the embodiment of the utility model provides a small household sewage lifting pump station with an external motor, which comprises a controller 1, a liquid level meter 2, a water collecting tank 3 and a water pump assembly 4, the water collecting tank 3 is provided with a water inlet 5, a water outlet 6 and a vent 7, the water pump assembly 4 comprises a motor 8 and a pump body 9, the pump body 9 is embedded on the water outlet 6 of the water collecting tank 3, the motor 8 is positioned outside the water collecting tank 3 and is connected with the pump body 9, the suction inlet of the pump body 9 is arranged in the water collecting tank 3, the discharge outlet of the pump body 9 is arranged outside the water collecting tank 3 and is connected with a check valve 10, the pump body 9 is provided with a flushing hole at the part which is close to the discharge port and is positioned in the water collecting tank 3, the controller 1 is respectively connected with the liquid level meter 2 and the motor 8, the controller 1 and the motor 8 are connected by a cable 18, and the liquid level meter 2 extends into the water collecting tank 3.
The working principle and the beneficial effects of the technical scheme are as follows: the water collecting tank is used for collecting sewage, the water pump assembly can be detached independently, the maintenance is convenient, and the check valve is used for preventing sewage of the municipal sewage discharge pipe from flowing back to the pump station; the controller is the brain of pump station, and the start-up and the stopping of intelligent control water pump, the pump body are equipped with the flushing hole, and the water pump during operation can wash the header tank inner wall, prevents that impurity from attaching to the lateral wall, also prevents that impurity from deposiing in the header tank. The utility model discloses a pump station is in the same place water pump assembly, header tank, check valve are integrated, compact structure, and area is little. The whole set of pump station is totally sealed, has no leakage and no peculiar smell. The motor is exposed outside, the service life is long, and the maintenance is convenient. The liquid level meter measures the liquid level height in the water collecting tank in real time. The controller intelligently controls the water pump to start and stop, and the safe operation of the pump station is ensured. The part of the pump body close to the discharge port side and located in the water collecting tank is provided with a flushing hole, water after pressure of part of the pump body is lifted is sprayed out of the flushing hole to flush the interior of the water collecting tank, impurities can be greatly reduced to be attached, pump station efficiency is improved, and sewage overflow caused by blocking is prevented.
In one embodiment, the liquid level meter 2 is a pneumatic liquid level meter, the liquid level meter 2 comprises a liquid level pipe 11 and a pneumatic pipe 19, one end of the liquid level pipe 11 extends into the water collection tank 3, the liquid level pipe 11 is connected with the tank body of the water collection tank 3 through threads, and the liquid level pipe 11 and the tank body of the water collection tank 3 are sealed through a sealing ring 14; one end of the liquid level pipe 11 is positioned outside the water collecting tank 3 and is hermetically connected with one end of an air pressure pipe 19 by adopting an air pipe joint 20, and the other end of the air pressure pipe 19 is hermetically connected with the controller 1; the pump body 9 is connected with the box body of the water collecting tank 3 by bolts 17, and the pump body 9 and the box body are sealed by a sealing gasket 24; the water inlet 5 is connected with a building drain pipe by adopting a water inlet rubber connecting pipe 13 and is fixed by a hoop 15, and the vent 7 is connected with a ventilation rubber connecting pipe 12; the check valve 10 comprises a check valve flap 25 and a check valve body 26, the check valve flap 25 is installed in the check valve body 26, and the check valve 10 is connected with the discharge port 6 of the pump body 9 by a flange 23.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, the liquid level meter adopts the air pressure type liquid level meter, when the lower end opening of the liquid level pipe is immersed into sewage, the gas pressure in the liquid level pipe and the gas pressure pipe can be changed due to the water level change of the sewage in the box body, and the controller receives the gas pressure change and converts the gas pressure change into the liquid level of the sewage, so that a motor in the water pump assembly is controlled according to the liquid level; the pump body is connected with the box body of the water collecting tank through bolts, so that the water pump assembly can be conveniently and independently disassembled and installed, and the maintenance of the water pump assembly is facilitated; the vent hole can be connected with a building exhaust pipe through a ventilation rubber connecting pipe and led out of the room, so that the smell of sewage in the box body is prevented from being emitted indoors; the water inlet is connected with the building drain pipe by adopting a water inlet rubber connecting pipe, so that the installation requirement of center alignment can be reduced, and the connection operation is convenient in a clamp fixing mode; the check valve is connected with the discharge port of the pump body by a flange, so that the check valve can be conveniently replaced.
In one embodiment, a high-level float 21 is connected to the controller 1, and the high-level float 21 is installed at the top of the water collecting tank 3; the bottom surface of the water collecting tank 3 is an inclined surface, and the lower end of the inclined surface is positioned at the suction inlet side of the pump body 9; the bottom of the water collecting tank 3 is fixed on the ground by adopting foundation bolts 16.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, the high-level floater and the liquid level meter form a redundant liquid level system, and when the liquid level meter is in failure, the high-level floater monitors the liquid level to prevent overflow; the bottom surface of the water collecting tank is designed into an inclined surface so as to send the sewage into the suction inlet of the pump body.
In one embodiment, as shown in fig. 4, the pump body 9 is provided with a half-open back-sweeping impeller 27, the half-open back-sweeping impeller 27 comprises a wheel disc 28 and a plurality of back-sweeping blades 29, the wheel disc 28 is circular and provided with a shaft hole 30 at the center, the back-sweeping blades 29 are fixed on the same side surface of the wheel disc 28 and are circumferentially and uniformly arranged around the shaft hole 30, and the ends of the back-sweeping blades 29 far away from the shaft hole 30 are provided with release grooves 31.
The working principle and the beneficial effects of the technical scheme are as follows: this scheme normal water pump package spare has adopted and has prevented blockking up the technique, adopts the formula impeller of sweeping after half-opening in the pump body, sweeps formula blade and release recess work of cooperating jointly afterwards, sweeps formula blade after to and cleans pump body inner wall, and the impurity that cleans down passes through from the release recess, lets the water pump have self-cleaning function, greatly reduced the possibility that takes place to block up and also guaranteed the high-efficient operation of water pump simultaneously.
In one embodiment, a flushing pipe 22 is arranged outside the water collecting tank, one end of the flushing pipe 22 extends into the water collecting tank 3 and is hermetically connected with the tank body of the water collecting tank 3, and the other end of the flushing pipe 22 is connected with the discharge port side of the pump body 9; as shown in fig. 5, a rotary nozzle 32 is arranged at one end of the flushing pipe 22 extending into the water collecting tank, the rotary nozzle 32 comprises a fixed disc 33, a rotary disc 34, a first nozzle 35 and a second nozzle 36, the fixed disc 33 is provided with a pipe hole 37 fixedly connected with the flushing pipe 22, the rotary disc 34 is connected with the fixed disc 33 and can rotate around the fixed disc 33, the first nozzle 35 is tangentially connected with the rotary disc 34, the second nozzle 36 is positioned at the tangential inner side of the first nozzle 35 and is connected with the first nozzle 35 at a right angle, and the rotary disc 34, the first nozzle 35 and the second nozzle 36 are in a plane perpendicular to the axis of the pipe hole 37.
The working principle and the beneficial effects of the technical scheme are as follows: according to the scheme, the flushing pipe is arranged outside the water collecting tank, one end of the flushing pipe is arranged on the water collecting tank, and the other end of the flushing pipe is arranged on the pump body, so that on one hand, high-pressure water in the pump body can be guided to flush the inner wall of the water collecting tank, and attachments are reduced; on the other hand, the external flushing pipe can also discharge gas in the pump body, so that the water pump is prevented from idling and cannot discharge water; a rotary spray head is arranged at one end of the flushing pipe extending into the water collecting tank, and the rotary disk, the first nozzle and the second nozzle rotate together through torque generated by water flow injection to flush the inner wall of the water collecting tank in all directions; the first and second nozzles may be provided in plurality, arranged in a circumferentially diverging manner around the rotating disc, keeping the torque generated by the jets in the same direction.
In one embodiment, the water collecting tank 3 is made of polyethylene material, and the water inlets 5 are multiple and are arranged on the top surface and/or the side surface of the water collecting tank 3; the air vent 7 is provided on the top surface of the water collecting tank 3.
The working principle and the beneficial effects of the technical scheme are as follows: the water collecting tank is made of polyethylene materials, so that the weight is light, and the transportation and the carrying are convenient; the volume of the water collecting tank of the utility model can be set selectively, for example, 50L volume is set; a plurality of water inlets can distribute at the top surface, the left side, the right side and/or the back of header tank, and the same face can set up a water inlet, also can set up a plurality of water inlets at the same face interval, and the size of water inlet and blow vent can set up as required, for example sets up the water inlet of different bores such as DN100 and DN50 respectively, and the blow vent size is DN50 to satisfy the drainage requirement of different directions, different pipe diameters.
The utility model discloses a pump station mounting means does:
The controller 1 is connected to an on-site power supply. The pump station is connected with the field pipeline in the same mode, one end of the rubber connecting pipe is sleeved into a connector of the pump station, the other end of the rubber connecting pipe is sleeved into a pipeline in a field building, the rubber connecting pipe is tightly tied on the pipeline through a hoop 15, sewage leakage is prevented, and the operation is simple.
The utility model discloses a running mode of pump station does:
when people perform daily activities such as toileting, bathing, washing clothes and the like in the basement, the generated domestic sewage flows into the water collecting tank 3 along the drainage pipe/the sewage discharge pipe. As the liquid level in the header tank 3 rises, the air in the liquid level pipe 11 is compressed, and the gas pressure gradually increases. The air pressure pipe 19 transmits the air pressure to the controller 1, and the controller 1 calculates the liquid level height in the water collecting tank 3. When the liquid level reaches a certain height (first set height), the controller 1 will start the motor. The water pump assembly 4 conveys the sewage in the water collecting tank 3 from the outlet to the check valve 10, and the check valve clack 25 is jacked open by the water flow, so that the sewage is introduced into the municipal sewage pipe. When the water pump assembly is running, part of the high-pressure water is sprayed out from the washing holes on the pump body 9 to wash the inside of the water collecting tank 3.
As the water pump assembly 4 operates, the liquid level in the water collection tank 3 gradually decreases, and the air pressure in the liquid level pipe 11 gradually decreases. The pneumatic tube 19 transmits the air pressure to the controller 1, the controller 1 calculates the liquid level height in the water collecting tank 3, and when the liquid level is lower than a certain value (a second set height), the controller 1 stops the operation of the motor and stops the water flow. Under the effect of gravity, the check valve clack 25 is closed, and the sewage of municipal sewage pipes is prevented from flowing back to the pump station.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides an external small-size domestic sewage of motor promotes pump station, a serial communication port, including controller, level gauge, header tank and water pump assembly, the header tank sets up water inlet, delivery port and blow vent, water pump assembly includes the motor and the pump body, the pump body is embedded to be installed on the delivery port of header tank, the motor be located the header tank outside and with pump body coupling, the sunction inlet of the pump body is in the header tank, the discharge port of the pump body is located the header tank outside and is connected with the check valve, the pump body is being close to the discharge port side and is being located the part of header tank and is equipped with the flushing hole, the controller is connected with level gauge and motor respectively, the level gauge extends to in the header tank.
2. The small-sized domestic sewage lifting pump station with the external motor according to claim 1, wherein the liquid level meter is a pneumatic liquid level meter, the liquid level meter comprises a liquid level pipe and a pneumatic pipe, one end of the liquid level pipe extends into the water collection tank, the liquid level pipe is in threaded connection with a tank body of the water collection tank, and the liquid level pipe and the tank body of the water collection tank are sealed by a sealing ring; one end of the liquid level pipe is positioned outside the water collecting tank and is in sealing connection with one end of the air pressure pipe, and the other end of the air pressure pipe is in sealing connection with the controller.
3. The small-sized domestic sewage lifting pump station with the external motor according to claim 1, wherein the pump body is connected with the tank body of the water collecting tank by bolts, and the pump body and the tank body are sealed by a sealing gasket.
4. The small household sewage lifting pump station with the external motor according to claim 1, wherein the check valve comprises a check valve flap and a check valve body, the check valve flap is installed in the check valve body, and the check valve is connected with the discharge port of the pump body through a flange.
5. The small-sized domestic sewage lifting pump station with the external motor according to claim 1, wherein the controller is connected with a high-level float, and the high-level float is mounted at the top of the water collecting tank.
6. The small household sewage lifting pump station with the external motor according to claim 1, wherein the bottom surface of the water collecting tank is an inclined surface, and the lower end of the inclined surface is positioned on the suction inlet side of the pump body.
7. The small-sized domestic sewage lifting pump station with the external motor according to claim 1, wherein the pump body is internally provided with a semi-open back-sweeping impeller, the semi-open back-sweeping impeller comprises a wheel disc and a plurality of back-sweeping blades, the wheel disc is circular and is provided with a shaft hole at the center, the back-sweeping blades are fixed on the same side surface of the wheel disc and are uniformly arranged around the circumference of the shaft hole, and the end of the back-sweeping blades far away from the shaft hole is provided with a release groove.
8. The small-sized domestic sewage lifting pump station with the external motor according to claim 1, wherein a flushing pipe is arranged outside the water collecting tank, one end of the flushing pipe extends into the water collecting tank, the tank body of the water collecting tank is connected with the flushing pipe in a sealing mode, and the other end of the flushing pipe is connected with the discharge port side of the pump body.
9. The external small-size domestic sewage of motor promotes pump station according to claim 8, characterized in that, the one end that the flushing pipe stretched into in the header tank is equipped with rotatory nozzle, rotatory nozzle includes fixed disk, rotary disk, first nozzle and second nozzle, the fixed disk be equipped with flushing pipe fixed connection's tube hole, the rotary disk is connected with the fixed disk and can rotates around the fixed disk, first nozzle is the tangential with the rotary disk and is connected, the second nozzle is located the tangential inboard of first nozzle and is the right angle with first nozzle and is connected, rotary disk, first nozzle and second nozzle in with the plane of tube hole axis vertically.
10. The small household sewage lifting pump station with the external motor according to any one of claims 1 to 9, wherein the water collection tank is made of polyethylene material, and a plurality of water inlets are formed in the top surface and/or the side surface of the water collection tank; the air vent is arranged on the top surface of the water collecting tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022967045.XU CN213979258U (en) | 2020-12-10 | 2020-12-10 | External small-size domestic sewage of motor promotes pump station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022967045.XU CN213979258U (en) | 2020-12-10 | 2020-12-10 | External small-size domestic sewage of motor promotes pump station |
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| CN213979258U true CN213979258U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562016A (en) * | 2021-12-20 | 2022-05-31 | 利欧集团浙江泵业有限公司 | Integration sewage promotes pump station |
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2020
- 2020-12-10 CN CN202022967045.XU patent/CN213979258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114562016A (en) * | 2021-12-20 | 2022-05-31 | 利欧集团浙江泵业有限公司 | Integration sewage promotes pump station |
| CN114562016B (en) * | 2021-12-20 | 2023-11-03 | 利欧集团浙江泵业有限公司 | Integrated sewage lifting pump station |
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