CN220600022U

CN220600022U - Direct-connection air-entraining centrifugal self-priming pump

Info

Publication number: CN220600022U
Application number: CN202322080460.7U
Authority: CN
Inventors: 安庆彬; 安振源
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-08-04
Filing date: 2023-08-04
Publication date: 2024-03-15
Anticipated expiration: 2033-08-04

Abstract

The utility model discloses a direct-connection air-entraining centrifugal self-priming pump, which comprises a pump body, an inlet pipe, a water injection cavity and an outlet pipe, wherein the inlet pipe is of a bent pipe structure and is connected with the pump body, the pipe orifice of the inlet pipe is bent upwards to form a certain amount of stored water level in the cavity of the pump body, an impeller, a shaft seal and a direct-connection end cover are arranged in the pump body, the impeller, the shaft seal and the direct-connection end cover are in sealing connection through a pump shaft, the shaft seal adopts mechanical sealing to ensure normal operation under sealing conditions and synchronous rotation of the impeller and the pump shaft, the direct-connection end cover is directly connected with a power output end of an engine, the power output end of the engine drives the pump shaft and the impeller to rotate, the water injection cavity is connected with the upper end of the pump body through a one-way valve sealing ring, and the outlet pipe is connected with the water injection cavity. The self-priming pump body is characterized in that the pump body is internally provided with the water storage cavity, the self-priming function can be realized by only a small amount of water, the self-priming pump body is strong in self-priming capability, simple in structure, ingenious in design, convenient and fast to operate, low in maintenance cost and stable in quality, and better social and economic benefits are generated.

Description

Direct-connection air-entraining centrifugal self-priming pump

Technical Field

The utility model relates to the technical field of drainage and irrigation equipment, in particular to a direct-connection air-entraining centrifugal self-priming pump.

Background

In daily life and industrial and agricultural production, a centrifugal self-priming pump is a common water pump type, is quite widely used, and when the traditional centrifugal self-priming pump is started for the first time, as water does not enter the pump body, the pump body cannot realize self priming, at the moment, the pump body needs to be filled with water manually so as to establish liquid sealing and negative pressure between the pump body and a pipeline, and in order to realize the self priming function, the pump body needs to be filled with water before starting, and in order to fill the pump body, a large amount of water is needed to fill a pipeline from the pump to a water source, so that certain liquid is wasted, meanwhile, a certain time is needed in the water filling process, additional labor cost is needed, and the pump body needs to be fully filled until the pump body can be started normally, so that the starting time is prolonged; in the prior art, a combined structure of a centrifugal pump body and a well killing is also provided, the well killing is added on the basis of a common centrifugal pump to serve as manual auxiliary equipment so as to assist in realizing self-absorption capacity, namely, the well killing is manually operated to draw water firstly, then a motor is started to drive the pump body to realize circulating water supply, but the manual auxiliary equipment increases the complexity of the pump and also needs additional manual operation and maintenance; in addition, in the prior art, a vacuum exhaust self-priming device is adopted, so that liquid can be sucked into a pump body by generating negative pressure under the condition of no liquid supply and then is thrown out by centrifugal force, but the structure has higher requirements on a sealing component, and the sealing component is easy to wear, so that the failure rate is high. Therefore, a technical solution of a centrifugal self-priming pump which is simple and convenient to operate, low in maintenance cost and low in failure rate is particularly needed, and the technical solution is also a technical subject of the applicant.

Disclosure of Invention

The utility model aims to provide a direct-connection air-entraining type centrifugal self-priming pump, which is characterized in that a water storage cavity is formed in a pump body to form liquid seal and negative pressure, a self-priming function can be realized by filling a small amount of water, the self-priming capability and reliability of the pump are improved, the starting time is short, the operation difficulty and maintenance cost are reduced, the mechanical seal is adopted to ensure the stable operation of the seal, and the mechanical failure rate is greatly reduced.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a directly link air-entraining formula centrifugal self priming pump, includes the pump body, intake pipe, water injection cavity and outlet pipe, the intake pipe is return bend structure, with pump body coupling, intake pipe mouth of pipe is curved, be equipped with impeller, bearing seal and directly link the end cover in the pump body, impeller, bearing seal, directly link the end cover and pass through pump shaft sealing connection, directly link the end cover and the power take off end of engine directly links, the water injection cavity passes through the check valve sealing washer and connects in the pump body upper end, the water injection cavity is connected to the outlet pipe.

Preferably, the direct-connection air-entraining centrifugal self-priming pump is characterized in that the outlet pipe is sleeved with a connecting nut, the connecting nut is movably connected with the joint of the water injection cavity through the connecting nut, and a plurality of columnar bulges are arranged on the periphery of the connecting nut.

Preferably, the direct-connected bleed air type centrifugal self-priming pump is characterized in that an exhaust valve is arranged on the pipe wall of the inlet pipe.

Preferably, the direct-connection bleed-air type centrifugal self-priming pump is characterized in that the shaft seal is a mechanical seal.

Preferably, the direct-connection bleed air type centrifugal self-priming pump is characterized in that the inlet pipe is of a straight pipe structure and is connected with the pump body through the second check valve sealing ring.

Preferably, the direct-connection air-entraining centrifugal self-priming pump is characterized in that the exhaust valve is arranged on the wall of the outlet pipe or on the wall of the water injection cavity.

Due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. the inlet pipe adopts a bent pipe structure which is bent upwards or a straight pipe structure provided with the check valve sealing ring II, can form liquid storage in the inner cavity of the pump body, can be filled with a small amount of water to realize the self-priming function, and compared with the traditional centrifugal self-priming pump which needs a large amount of water to fill up the pipeline from the pump to the water source, the self-priming water is greatly saved, the additional labor cost is reduced, the starting operation is simple, and the starting time is greatly shortened.

2. The utility model adopts the water injection cavity and the outlet pipe structure provided with the connecting nut, so that the filling operation is more convenient, the disassembly and the assembly are convenient, the operation convenience and the safety are greatly improved, and the operation is more stable and reliable.

3. The shaft seal adopts mechanical seal, so that the sealing connection is stable and reliable, and the stability is greatly improved.

4. The utility model adopts the bleed air structure of the exhaust valve, can utilize the negative pressure formed by the cyclone action in the exhaust barrel of the engine to remove the gas in the pump and form the negative pressure, thereby ensuring the efficient and stable operation of the pump.

The utility model has simple structure, ingenious design and stable running quality, and generates better social and economic benefits.

Drawings

Fig. 1 is an exploded view of the principle structure of an embodiment 1 of a direct connection bleed air type centrifugal self-priming pump of the present utility model.

Fig. 2 is an exploded view of the principle structure of the embodiment 2 of the direct-connected bleed air centrifugal self-priming pump of the present utility model.

1, a pump body; 2. an inlet pipe; 3. a water injection cavity; 4. an outlet tube; 5. an impeller; 6. a shaft seal; 7. the end cover is directly connected; 8. a coupling nut; 9. a check valve seal ring; 10. a second check valve sealing ring; 11. and (5) exhausting the valve.

Detailed Description

The direct bleed centrifugal self-priming pump of the present utility model is further illustrated and described below with reference to the following examples.

Example 1: referring to fig. 1, the direct connection air-entraining centrifugal self-priming pump comprises a pump body 1, an inlet pipe 2, a water injection cavity 3 and an outlet pipe 4, wherein the inlet pipe 2 is of a bent pipe structure and is connected with the pump body 1, a pipe orifice of the inlet pipe 2 is bent upwards to form a certain amount of storage water level in a cavity of the pump body 1, an impeller 5, a shaft seal 6 and a direct connection end cover 7 are arranged in the pump body 1, the impeller 5, the shaft seal 6 and the direct connection end cover 7 are in sealing connection through a pump shaft so as to ensure normal operation under a sealing condition and synchronous rotation of the impeller 5 and the pump shaft, the direct connection end cover 7 is directly connected with a power output end of an engine, the power output end of the engine drives the pump shaft and the impeller 5 to rotate, the water injection cavity 3 is connected to the upper end of the pump body 1 through a one-way valve sealing ring 9, so that air or liquid can not go upwards, and the outlet pipe 4 is connected with the water injection cavity 3.

Preferably, the direct-connection air-entraining centrifugal self-priming pump is characterized in that the outlet pipe 4 is sleeved with the connecting nut 8, the connecting nut 8 is movably connected with the interface of the water injection cavity 3, and a plurality of columnar protrusions are arranged on the periphery of the connecting nut 8, so that manual disassembly and labor saving are facilitated, and liquid is conveniently filled into the water injection cavity 3.

Preferably, the direct-connection bleed-air type centrifugal self-priming pump is characterized in that the exhaust valve 11 is arranged on the pipe wall of the inlet pipe 2, so that the gas in the pump can be conveniently discharged, and the normal operation of the pump is ensured.

Preferably, the shaft seal 6 is a mechanical seal to ensure the normal operation of the pump under sealed conditions.

And (2) mounting: the inlet pipe 2, the water injection cavity 3 and the outlet pipe 4 are sequentially connected with the pump body 1, and the impeller 5, the shaft seal 6 and the direct-connection end cover 7 are hermetically connected with the pump body 1 through the pump shaft and the bearing.

Matching and application: the direct-connection air-entraining centrifugal self-priming pump can be used as a core part for a mobile pump truck, and when the direct-connection air-entraining centrifugal self-priming pump is matched with the mobile pump truck, the direct-connection end cover 7, the pump shaft and the power output end of an engine are directly connected, the base part of the pump body 1 is connected to a frame of the pump truck through a U-shaped hole, the exhaust valve 11 is connected with an engine exhaust pipe through an air suction pipe, the inlet pipe 2 is externally connected with a water suction pipe and connected with a water source, and the outlet pipe 4 is externally connected with a water discharge pipe for water receiving application.

When the pump is used for the first time, the connecting nut 8 on the outlet pipe 4 is unscrewed, the outlet pipe 4 is taken down, the one-way valve on the one-way valve sealing ring 9 is lifted, a certain amount of water is added into the water injection cavity 3, the water level rises to the pipe orifice of the upper bend of the inlet pipe 2, afterwards, the outlet pipe 4 and the water injection cavity 3 are connected and the connecting nut 8 is screwed, before starting, the exhaust valve 11 is firstly opened, then the engine is started, the engine drives the pump shaft and the impeller 5 to rotate, the water stored in the cavity of the pump body 1 is driven by the rotation of the impeller 5 to generate centrifugal force, liquid sealing and negative pressure are formed, the water of a water source is sucked through the inlet pipe 2 and the connected water suction pipe, the cyclone effect caused by the high-temperature, high-speed and high-pressure gas discharged by the engine in the engine exhaust pipe can form the negative pressure in the engine exhaust pipe, so that the gas in the inlet pipe 2 is discharged through the air suction pipe, when the air in the inlet pipe 2 is emptied to form vacuum, the water sucked into the cavity of the pump body 1 is closed, the liquid is continuously sucked into the pump body 1, and the water is continuously sucked through the outlet pipe 4, like, and thus the continuous water suction is realized.

Example 2: referring to fig. 2, the structure of the direct-connection bleed-air type centrifugal self-priming pump is similar to that of the embodiment 1, and the main difference is that in the embodiment, the inlet pipe 2 is of a straight pipe structure, and the inlet pipe 2 is connected with the pump body 1 through the second check valve sealing ring 10, so that air or liquid can travel into the pump body 1 instead of downward.

Preferably, the exhaust valve 11 is mounted on the wall of the inlet pipe 2, the wall of the outlet pipe 4 or the cavity wall of the water injection cavity 3.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, but any simple modification, equivalent variation or modification made to the above examples according to the technical principles of the present utility model still falls within the scope of the technical solutions of the present utility model.

Claims

1. The utility model provides a directly link air-entraining centrifugal self priming pump, includes pump body (1), intake pipe (2), water injection cavity (3) and outlet pipe (4), its characterized in that, intake pipe (2) are elbow structure, are connected with pump body (1), and intake pipe (2) mouth of pipe is curved, be equipped with impeller (5), bearing seal (6) and directly link end cover (7) in pump body (1), impeller (5), bearing seal (6), directly link end cover (7) through pump shaft sealing connection, directly link end cover (7) and the power take off end of engine directly link, water injection cavity (3) are connected in pump body (1) upper end through check valve sealing washer (9), water injection cavity (3) are connected to outlet pipe (4).

2. The direct-connection air-entraining centrifugal self-priming pump according to claim 1, wherein a connecting nut (8) is sleeved on the outlet pipe (4), the connecting nut (8) is movably connected with the interface of the water injection cavity (3), and a plurality of columnar protrusions are arranged on the periphery of the connecting nut (8).

3. The direct-connection bleed-air type centrifugal self-priming pump according to claim 1, wherein the pipe wall of the inlet pipe (2) is provided with an exhaust valve (11).

4. The direct-connection bleed air type centrifugal self-priming pump according to claim 1, characterized in that the shaft seal (6) is a mechanical seal.

5. The direct-connection bleed-air type centrifugal self-priming pump according to claim 1, wherein the inlet pipe (2) is of a straight pipe structure, and the inlet pipe (2) is connected with the pump body (1) through a second check valve sealing ring (10).

6. A direct-connection bleed-air type centrifugal self-priming pump according to claim 3, characterized in that the bleed valve (11) is mounted either on the wall of the outlet pipe (4) or on the cavity wall of the water injection cavity (3).