Diesel engine mixed-flow pump starting method

Abstract

The invention belongs to the technical field of starting of diesel engine mixed-flow pumps, and provides the following scheme for solving the problems that an existing diesel engine mixed-flow pump is complex in starting, harsh in meeting condition and inconvenient to use, the diesel engine mixed-flow pump starting device comprises a base, a diesel engine body and a water pump are fixedly installed at the top of the base, and an air inlet pipe is installed on the diesel engine body; the same guide pipe is installed between the water pump and the diesel engine body, a first valve is installed on the guide pipe, a second valve is installed on the air inlet pipe, and a control switch and a check valve are arranged on the guide pipe. The diesel engine mixed-flow pump has the advantages that the evacuation starting mode of the diesel engine mixed-flow pump is improved, the diesel engine is additionally provided with another vacuum pump, the diesel engine not only transmits power to the water pump, but also plays a role of the vacuum pump, the vacuum pump is directly omitted, labor intensity of water pumping operation is relieved, and working efficiency is improved. The problem that electric vacuum starting must be conducted is perfectly solved, work of the diesel engine mixed-flow pump is completely not limited by sites, the work efficiency of the diesel engine mixed-flow pump is further improved, the water pump power is in direct proportion to the matched diesel engine power, and therefore the diesel engine mixed-flow pump can be suitable for water pumps of any model, and the popularization prospect is wide.

Description

Technical Field

[0001] This invention relates to the field of diesel engine mixed-flow pump starting technology, and in particular to a new evacuation starting method for diesel engine mixed-flow pumps. Background Technology

[0002] The necessary condition for a mixed-flow pump to start and discharge water is that the pump body must be filled with water. Currently, there are two ways to meet this condition: First, install a stop valve (commonly known as a faucet) at the top of the inlet pipe, then manually or with another water pump, fill the inlet pipe and pump body with water from the outlet, and then start the pump. Second, evacuate the air from the pump body and inlet pipe, allowing water to enter and fill the inlet pipe before starting the pump. There are two methods for evacuating the air from the pump body: one is using a vacuum pump. The obvious disadvantage of this method is that it requires a separate vacuum pump and a power source, making it difficult to meet the requirements in unspecified farmland or irrigation ditches. The second method is installing a hand pump on the pump for manual evacuation. The advantage of this method is that it does not require a power source and can be done anytime, anywhere. However, its disadvantages are also obvious: it can only be used with small household diesel engine water pumps, which is both time-consuming and labor-intensive. Larger pumps are difficult or impossible to operate manually, making it inconvenient for users. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing diesel engine mixed-flow pumps, such as complex startup, demanding start-up conditions, and inconvenience in use, and to propose a new diesel engine mixed-flow pump startup method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The first step is to modify the diesel engine mixed-flow pump set, such as... Figure 1As shown, install a set of starting components. First, modify the diesel engine intake pipe and install a manual butterfly valve (9) on the intake pipe. Then, open another intake port on the intake pipe between the butterfly valve and the diesel engine body and install a valve (8). Second, install the suction pipe head and valve (7) on the mixed flow pump body. Third, assemble a transparent rigid air duct (5) and connect an air check valve (6) to the duct. Fourth, use the duct (5) to connect the valve (7) on the suction port of the mixed flow pump body and the valve (8) on the diesel engine intake port. The starting components are now installed. The second step is to put the water inlet pipe of the mixed flow pump into the water source to be taken and close the butterfly valve on the outlet pipe of the mixed flow pump. There are generally two ways to close it: one is to fold and seal the plastic water hose connected to the outlet pipe of agricultural irrigation pumps under 8 inches; the other is to install a butterfly valve on the outlet pipe of larger pumps over 8 inches to seal it. The third step is to start the pump. First, start the diesel engine to begin operation. Then, open the mixed flow pump exhaust port valve (7) and the diesel engine intake port valve (8), and close the diesel engine intake pipe butterfly valve (9) to begin the evacuation operation. When you see water overflowing from the water pump in the guide pipe (5), it means that the evacuation operation is complete. Then, open the diesel engine intake pipe butterfly valve in sequence, close valve (8) and valve (7), and open the water pump outlet pipe butterfly valve to begin the water pumping operation.

[0005] The beneficial effects of this invention lie in improving the vacuum start-up method of the diesel engine mixed-flow pump, giving the diesel engine another identity—a "vacuum pump." The diesel engine not only transmits power to the water pump but also assumes the function of a vacuum pump, directly eliminating the need for a vacuum pump, reducing the labor intensity of water pumping operations, and perfectly solving the problem of having to use electric vacuum start-up. This allows the diesel engine mixed-flow pump to operate without any site restrictions, further improving its working efficiency. Since the power of the water pump is directly proportional to the power of the matching diesel engine, it can be applied to any type of water pump, and has broad prospects for promotion. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of a diesel engine mixed-flow pump starting method according to the present invention.

[0007] In the diagram: 1. Base; 2. Diesel engine body; 3. Water pump; 4. Intake pipe; 5. Guide pipe; 6. Check valve; 7. Mixed flow pump intake valve; 8. Diesel engine intake valve; 9. Diesel engine intake pipe butterfly valve Detailed Implementation

[0008] The working principle is to utilize the air drawn from the natural environment to be drawn from a sealed mixed-flow pump, thereby evacuating the air from the water pump and filling it with water. (Refer to...) Figure 1A diesel engine mixed-flow pump starting assembly includes a base 1, a diesel engine body 2 and a water pump 3 fixedly mounted on the top of the base 1, an intake pipe 4 mounted on the diesel engine body 2, a manual butterfly valve mounted on the intake pipe 4, and a common conduit 5 between the water pump 3 and the diesel engine body 2. The conduit 5 is made of transparent hard material, with one end connected to the mixed-flow pump outlet valve 7 and the other end connected to the diesel engine intake valve 8, and a check valve 6 connected in the middle.

[0009] First, insert the inlet pipe of water pump 3 into the water source to be pumped, and seal the outlet pipe of water pump 3. Then, start the diesel engine body 2 normally. Second, open the air outlet valve 7 of the mixed flow pump and the air inlet valve 8 of the diesel engine, and close the diesel engine intake pipe butterfly valve 9 on the diesel engine body 2. In this way, the water pump 3 will begin to be evacuated through the conduit 5. After the pump body is evacuated and filled with water, open the diesel engine intake pipe butterfly valve 9 on the diesel engine body 2, and at the same time close valves 7 and 8, open the closed outlet of the mixed flow pump, and then start the water pumping operation.

[0010] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A method for starting a diesel engine mixed-flow pump, comprising three steps: The first step is to add a starting assembly to the diesel engine mixed-flow pump assembly and make simple modifications. First, modify the diesel engine intake pipe, install a manual butterfly valve (9) on the intake pipe, and open an intake port on the intake pipe between the butterfly valve and the diesel engine body and install a valve (8); second, install the exhaust pipe head and valve (7) on the mixed-flow pump body; third, assemble a transparent rigid air duct (5) and connect an air check valve (6) to the duct; fourth, connect the exhaust port valve (7) on the mixed-flow pump body and the diesel engine intake port valve (8) with the duct (5), and the starting assembly is completed. The second step: put the water inlet pipe of the mixed-flow pump into the water source to be taken, and close the butterfly valve of the water outlet pipe of the mixed-flow pump. The third step: start. First, start the diesel engine to begin operation. Then, open the mixed flow pump exhaust port valve (7) and the diesel engine intake port valve (8), and close the diesel engine intake pipe butterfly valve (9) to begin the evacuation operation. When you see water overflowing from the water pump in the guide pipe (5), it means that the evacuation operation is complete. Then, open the diesel engine intake pipe butterfly valve in sequence, close valve (8) and valve (7), and open the water pump outlet pipe butterfly valve to begin the water pumping operation.

2. The diesel engine mixed-flow pump starting method according to claim 1, wherein the first step is characterized in that the simple modification of the diesel engine mixed-flow pump group by adding a starting component is the premise, core and guarantee of the starting method of the invention.

3. The diesel engine mixed flow pump starting method according to claim 1, the first step is characterized in that the manual butterfly valve (9) installed on the diesel engine intake pipe (4) is only temporarily closed when starting to pump air, and is open at other times, which does not affect the normal operation of the diesel engine.

4. The diesel engine mixed flow pump starting method according to claim 1, the first step is characterized in that the conduit (5) is made of hard transparent material, which ensures that it can withstand pressure and observe the evacuation situation, and the air check valve (6) connected therein ensures that the air in the water pump runs outward in one direction.

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