Centrifugal pump for conveying domestic sewage

Abstract

The utility model provides a domestic sewage delivery centrifugal pump which comprises a pump body and a motor, one end of the pump body is provided with a water inlet pipe, the other end of the pump body is provided with a drainage pipe, the output end of the motor is connected with the pump body, one side of the pump body is further provided with a water storage tank, water is stored in the water storage tank, and the water storage tank is further provided with a micro pump. A first suction pipe is arranged at the water inlet end of the micro pump and located in the water storage tank, a first conveying pipe is arranged at the water drainage end of the micro pump, and the extending end of the first conveying pipe is communicated with the side wall of the water drainage pipe. Water in the water storage tank can be sucked to the drainage pipe by controlling the micro pump to start and cooperating with the first suction pipe and the first conveying pipe, so that the water enters the pump body through the drainage pipe, automatic water replenishing of the pump body is achieved, the problem of original manual water replenishing is solved, an operator does not need to work in a severe environment, and use and operation are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a centrifugal pump for conveying domestic sewage. Background Art

[0002] Domestic sewage is wastewater discharged from residents' daily lives, mainly from residential buildings and public buildings, such as residences, government offices, schools, hospitals, shops, public places and toilets of industrial enterprises. The pollutants contained in domestic sewage are mainly organic matter (such as protein, carbohydrates, fat, urea, ammonia nitrogen, etc.) and a large number of pathogenic microorganisms (such as parasite eggs and enteric infectious viruses, etc.). The organic matter in domestic sewage is extremely unstable and easily decomposes to produce a foul odor. Bacteria and pathogens multiply in large numbers with organic matter in domestic sewage as nutrition, which can lead to the spread of infectious diseases. Therefore, domestic sewage must be treated before discharge.

[0003] When domestic sewage is treated, a centrifugal pump is needed to transport the sewage to the required location. However, when the existing centrifugal pump is used, due to the characteristics of the centrifugal pump, it is necessary to manually replenish water every time the sewage is pumped out, which is very troublesome to operate. In addition, the working environment of starting the sewage centrifugal pump is poor, which affects the health of the operator who replenishes water. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a centrifugal pump for transporting domestic sewage. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A centrifugal pump for conveying domestic sewage comprises a pump body and a motor, wherein one end of the pump body is provided with a water inlet pipe, the other end of the pump body is provided with a drain pipe, the output end of the motor is connected to the pump body, one side of the pump body is also provided with a water storage tank, water is stored in the water storage tank, and a micro pump is also provided on the water storage tank, a first suction pipe is provided at the water inlet end of the micro pump, the first suction pipe is located in the water storage tank, a first delivery pipe is provided at the discharge end of the micro pump, and an extension end of the first delivery pipe is communicated with a side wall of the drain pipe.

[0006] Furthermore, a second delivery pipe connected to the first delivery pipe is provided in the middle of the first delivery pipe, a meandering heat exchange pipe is provided inside the motor, an extended end of the second delivery pipe is connected to a water inlet end of the heat exchange pipe, a connected return pipe is provided on the water storage tank, a discharge end of the heat exchange pipe is connected to the return pipe, and a first valve for controlling the opening and closing is provided at both the delivery end of the first delivery pipe and the delivery end of the second delivery pipe.

[0007] Furthermore, a second suction pipe is provided in the middle of the first suction pipe, and an extended end of the second suction pipe is connected to the side wall of the water inlet pipe. The suction ends of the first suction pipe and the second suction pipe are both provided with a second valve for controlling opening and closing.

[0008] Furthermore, the first valve and the second valve are both solenoid valves.

[0009] Furthermore, a filtering mechanism for filtering sewage is provided in the second suction pipe.

[0010] Furthermore, a fixedly connected bottom plate is provided at the bottom of the pump body, and the water tank and the motor are both fixedly mounted on the bottom plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] Through the design of the water tank, the first suction pipe, the first delivery pipe and the micro pump, before the centrifugal pump is started, the micro pump can be controlled to start, and in conjunction with the first suction pipe and the first delivery pipe, the water in the water tank can be sucked to the drain pipe, and then enter the pump body through the drain pipe, thereby realizing automatic water replenishment of the pump body and solving the original problem of manual water replenishment. The operator does not need to work in a harsh environment, and the use and operation are convenient and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of a water storage tank, a first delivery pipe, a second delivery pipe, a first suction pipe and a second suction pipe according to an embodiment of the utility model.

[0016] In the above drawings: 1. pump body; 11. drain pipe; 12. water inlet pipe; 13. motor; 2. water storage tank; 21. micro pump; 22. second delivery pipe; 23. return pipe; 24. first delivery pipe; 25. second suction pipe; 26. first suction pipe; 3. bottom plate. DETAILED DESCRIPTION

[0017] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Example 1

[0019] See also Figure 1 and Figure 2A centrifugal pump for conveying domestic sewage comprises a pump body 1 and a motor 13. A water inlet pipe 12 is provided at one end of the pump body 1, and a drain pipe 11 is provided at the other end of the pump body 1. The output end of the motor 13 is connected to the pump body 1. A water storage tank 2 is also provided on one side of the pump body 1. Water is stored in the water storage tank 2, and a micro pump 21 is also provided on the water storage tank 2. A first suction pipe 26 is provided at the water inlet end of the micro pump 21, and the first suction pipe 26 is located in the water storage tank 2. A first delivery pipe 24 is provided at the discharge end of the micro pump 21, and an extension end of the first delivery pipe 24 is communicated with a side wall of the drain pipe 11.

[0020] The design of the water tank 2, the first suction pipe 26, the first delivery pipe 24 and the micro pump 21 can control the micro pump 21 to start before the centrifugal pump is started. In conjunction with the first suction pipe 26 and the first delivery pipe 24, the water in the water tank 2 can be sucked into the drain pipe 11, and then enter the pump body 1 through the drain pipe 11, thereby realizing automatic water replenishment of the pump body 1 and solving the problem of original manual water replenishment.

[0021] In this embodiment, a fixedly connected bottom plate 3 is provided at the bottom of the pump body 1 , and the water storage tank 2 and the motor 13 are both fixedly mounted on the bottom plate 3 .

[0022] Example 2

[0023] The same points as Example 1 are not described here, but the differences from Example 1 are as follows:

[0024] See also Figure 1 and Figure 2 A connected second delivery pipe 22 is provided in the middle of the first delivery pipe 24, a meandering heat exchange pipe is provided inside the motor 13, an extended end of the second delivery pipe 22 is connected to a water inlet end of the heat exchange pipe, a connected return pipe 23 is provided on the water storage tank 2, a discharge end of the heat exchange pipe is connected to the return pipe 23, and a first valve for controlling the opening and closing is provided at both the delivery end of the first delivery pipe 24 and the delivery end of the second delivery pipe 22.

[0025] The addition of the second delivery pipe 22, the heat exchange pipe and the return pipe 23 can make the water tank not only be used to replenish the pump body 1, but also when the centrifugal pump is in normal use, by controlling the first valve of the first delivery pipe 24 to be closed, the micro pump 21 can suck water through the water tank 2 and deliver it to the heat exchange pipe through the second delivery pipe 22. The water flows through the heat exchange pipe in the form of heat exchange to cool the inside of the motor 13. After the heat exchange, it flows back to the water tank through the return pipe 23, so that the water in the water tank 2 can circulate through the heat exchange pipe to heat and cool the inside of the motor 13, which can effectively ensure the working efficiency of the motor 13 and prevent the motor 13 from overheating.

[0026] In this embodiment, the first valves are all solenoid valves.

[0027] Example 3

[0028] The same points as Example 2 are not described here, but the differences from Example 2 are as follows:

[0029] See also Figure 1 and Figure 2 A second suction pipe 25 is provided in the middle of the first suction pipe 26, and the extending end of the second suction pipe 25 is connected to the side wall of the water inlet pipe 12. The suction ends of the first suction pipe 26 and the second suction pipe 25 are both provided with a second valve for controlling the opening and closing.

[0030] The addition of the second suction pipe 25 and the opening and closing of the second valve enable a portion of the water flowing through the water inlet pipe 12 to be sucked into the water tank 2 through the second suction pipe 25 after the water in the water tank 2 has been pumped out, thereby achieving automatic water replenishment in the water tank 2.

[0031] In this embodiment, the second valves are all solenoid valves.

[0032] In this embodiment, a filtering mechanism for sewage filtering is provided in the second suction pipe 25. The addition of the filtering mechanism can effectively prevent the second suction pipe 25 from sucking in impurities in the sewage during suction, thereby ensuring the cleanliness of the water in the water storage tank 2 and preventing impurities from accumulating in the water storage tank 2.

[0033] When using this application:

[0034] Automatic water replenishment mode: control the valves in the first delivery pipe 24 and the first suction pipe 26 to open, and close the valves in the second delivery pipe 22 and the second suction pipe 25. At this time, start the micro pump 21 to automatically pump the water in the water tank 2 into the pump body 1, thus realizing automatic water replenishment of the pump body 1;

[0035] Circulation heat exchange and cooling mode: control the valves of the first suction pipe 26 and the second delivery pipe 22 to open, and close the valves of the second suction pipe 25 and the first delivery pipe 24. At this time, start the micro pump 21, so that the water in the water storage tank 2 can enter the heat exchange pipe under the action of the micro pump 21, and then enter the return pipe 23 through the heat exchange pipe, and return to the water storage tank through the return pipe 23, so that the water in the water storage tank 2 can circulate to perform heat exchange and cooling inside the motor 13;

[0036] Automatic water replacement mode: a temperature sensor can be set in the water tank 2, and the temperature sensor and the solenoid valve are matched. When the temperature sensor senses that the water temperature is greater than the set temperature, the first valve on the first delivery pipe 24 and the second valve on the first suction pipe 26 are controlled to open, and the first valve of the second delivery pipe 22 and the second valve in the second suction pipe 25 are closed, so that the hot water in the water tank 2 can be automatically sucked and discharged through the drain pipe 11. When the water in the water tank 2 is pumped to a certain extent, the second valve of the second suction pipe 25 and the first valve of the second delivery pipe 22 are controlled to open, and the first valve of the first delivery pipe 24 and the second valve in the first suction pipe 26 are closed. At this time, a part of the water in the centrifugal pump suction process can be sucked into the water tank 2 through the second suction pipe 25, so that the water in the water tank 2 is automatically replenished and the water in the water tank 2 is automatically replaced. Through the form of automatic water replacement, it is ensured that the water in the water tank 2 is always kept within a certain temperature range, thereby ensuring the heat exchange and cooling effect of the heat exchange pipe on the motor 13.

[0037] By controlling the opening and closing of different valves, switching between different modes is achieved, which can not only realize automatic water replenishment of the pump body 1, but also realize heat exchange and cooling of the motor 13, and also realize control of the water temperature in the water tank 2.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A centrifugal pump for transporting domestic sewage, characterized in that: It includes a pump body and a motor, wherein a water inlet pipe is provided at one end of the pump body, a drain pipe is provided at the other end of the pump body, the output end of the motor is connected to the pump body, a water tank is provided on one side of the pump body, water is stored in the water tank, and a micro pump is provided on the water tank, a first suction pipe is provided at the water inlet end of the micro pump, the first suction pipe is located in the water tank, a first delivery pipe is provided at the discharge end of the micro pump, and an extension end of the first delivery pipe is connected to the side wall of the drain pipe.

2. A centrifugal pump for transporting domestic sewage as claimed in claim 1, characterized in that: A second delivery pipe connected to the first delivery pipe is provided in the middle of the first delivery pipe, a meandering heat exchange pipe is provided inside the motor, an extended end of the second delivery pipe is connected to a water inlet end of the heat exchange pipe, a connected return pipe is provided on the water storage tank, a discharge end of the heat exchange pipe is connected to the return pipe, and a first valve for controlling opening and closing is provided at both the delivery end of the first delivery pipe and the delivery end of the second delivery pipe.

3. A centrifugal pump for transporting domestic sewage as claimed in claim 2, characterized in that: A second suction pipe is provided in the middle of the first suction pipe, and an extended end of the second suction pipe is connected to the side wall of the water inlet pipe. The suction ends of the first suction pipe and the second suction pipe are both provided with a second valve for controlling opening and closing.

4. A centrifugal pump for transporting domestic sewage as claimed in claim 3, characterized in that: The first valve and the second valve are both solenoid valves.

5. A centrifugal pump for transporting domestic sewage as claimed in claim 3, characterized in that: A filtering mechanism for filtering sewage is arranged in the second suction pipe.

6. A centrifugal pump for transporting domestic sewage as claimed in claim 1, characterized in that: A fixedly connected bottom plate is provided at the bottom of the pump body, and the water storage tank and the motor are both fixedly mounted on the bottom plate.

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