Efficient and accurate large-diameter double suction pump test pipeline arrangement system

Abstract

The utility model relates to an efficient and accurate large-caliber double suction pump test pipeline arrangement system which comprises an inlet pipeline part, a test pipeline part and an outlet pipeline part. The three parts are all fixed on the test board; the inlet pipeline part and the outlet pipeline part are respectively positioned at the inlet and the outlet of the whole system, and the test pipeline part is positioned between the two parts; the inlet pipeline part sequentially comprises a high-flow booster pump, an inlet regulating valve and a metal corrugated pipe in the water incoming flow direction; the test pipeline part sequentially comprises an inlet reducer pipe, an inlet pressure tapping pipe, a tested water pump, an outlet pressure tapping straight pipe and an outlet reducer pipe in the water incoming flow direction; the outlet pipeline part sequentially comprises a flow meter front flow stabilizing straight pipe, an electromagnetic flow meter, a flow meter rear flow stabilizing straight pipe, an outlet adjusting valve and an outlet bent pipe in the water inlet flow direction. According to the utility model, the testing accuracy can be ensured, the vibration of the pipeline can be reduced, the adaptability of the pipeline can be improved, and the testing efficiency and precision can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of test pipeline arrangement system, specifically to a kind of guarantee the accuracy of test, reduce the vibration of pipeline, improve the adaptability of pipeline, improve the efficiency and precision of test high-efficiency accurate large-diameter double-suction pump test pipeline arrangement system. BACKGROUND

[0002] Large-diameter double-suction pump is widely used in industrial production, agricultural irrigation, urban water supply and many other fields. In order to ensure that the performance of the water pump meets the design requirements and use standards, strict real machine performance test is needed after the water pump is produced and manufactured or before it is put into use. The arrangement of the test pipeline has a crucial impact on the accuracy and reliability of the test results and the convenience and efficiency of the test process.

[0003] There may be some problems in the traditional water pump test pipeline arrangement. 1. The water flow in the pipeline is unstable, and vortex, turbulence and other phenomena are prone to occur, resulting in large measurement errors of water pump flow, head and other parameters; 2. In the test of high-lift water pump, the outlet pipeline is not fixed well, which causes the vibration of the whole system pipeline to be too large during the test; 3. When testing different types and specifications of water pumps, the adaptability of the pipeline is poor, and the pipeline needs to be frequently disassembled and modified, which not only consumes a lot of manpower, material resources and time, but also easily damages the pipeline components due to frequent operation, affecting the accuracy and efficiency of the test. SUMMARY

[0004] In view of the above problems, the main purpose of the utility model is to provide a kind of high-efficiency accurate large-diameter double-suction pump test pipeline arrangement system, which can guarantee the accuracy of test, reduce the vibration of pipeline, improve the adaptability of pipeline, improve the efficiency and precision of test.

[0005] The utility model solves the above technical problem by the following technical scheme: a kind of high-efficiency accurate large-diameter double-suction pump test pipeline arrangement system, the high-efficiency accurate large-diameter double-suction pump test pipeline arrangement system includes: import pipeline part, test pipeline part, outlet pipeline part;Import pipeline part, test pipeline part, outlet pipeline part are all fixed on test table.

[0006] The import pipeline part and the outlet pipeline part are located at the inlet and outlet of the whole system respectively, and the test pipeline part is located between the import pipeline part and the outlet pipeline part.

[0007] The import pipeline part includes, in order from the direction of water inflow, a large-flow pre-pump, an import regulating valve and a metal bellows.

[0008] The test pipeline part includes, in order from the direction of water inflow, an import reducing pipe, an import pressure-taking pipe, a water pump to be tested, an outlet pressure-taking straight pipe and an outlet reducing pipe.

[0009] The outlet pipeline part sequentially comprises a flowmeter front steady flow straight pipe, an electromagnetic flowmeter, a flowmeter rear steady flow straight pipe, an outlet regulating valve and an outlet elbow pipe from the water inlet flow direction.

[0010] In the embodiment of the utility model, the inlet metal bellows pipe is an inlet metal bellows pipe which can compensate axial and radial displacement.

[0011] In the embodiment of the utility model, the inlet pipeline part, the test pipeline part and the outlet pipeline part are all supported by pipeline support and bolted on the channel iron of the test bench.

[0012] In the embodiment of the utility model, the inlet variable diameter pipe is an inlet eccentric cone pipe.

[0013] In the embodiment of the utility model, the pressure taking position of the inlet pressure taking pipe should be arranged at the downstream of 2D1 of the inlet variable diameter pipe, wherein D1 is the diameter of the inlet pressure taking pipe.

[0014] In the embodiment of the utility model, the pressure taking position of the outlet pressure taking straight pipe should be arranged at the downstream of 2D2 of the outlet of the outlet pressure taking straight pipe, and at least 1D2 of the straight pipe section should be kept after pressure taking, wherein D2 is the diameter of the outlet pressure taking straight pipe.

[0015] In the embodiment of the utility model, at least 5D3 of the straight pipe section should be kept before the electromagnetic flowmeter, and at least 3D3 of the straight pipe section should be kept after the electromagnetic flowmeter, wherein D3 is the pipe diameter of the electromagnetic flowmeter.

[0016] The utility model discloses a high -efficient accurate large -diameter double -suction pump test pipeline arrangement system, which has the following advantages compared with the common technology: the utility model discloses can not only guarantee the accuracy of test, reduce the vibration of pipeline, but also can improve the adaptability of pipeline, improve test efficiency and precision. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model.

[0018] The following is the name corresponding to the mark in the utility model:

[0019] Inlet pipeline part 100, test pipeline part 200, outlet pipeline part 300.

[0020] Large flow pre-pump 101, inlet regulating valve 102, metal bellows pipe 103.

[0021] Inlet variable diameter pipe 201, inlet pressure taking pipe 202, measured water pump 203, outlet pressure taking straight pipe 204, outlet variable diameter pipe 205.

[0022] a flow meter front steady flow straight pipe 301, an electromagnetic flow meter 302, a flow meter rear steady flow straight pipe 303, an outlet regulating valve 304, and an outlet elbow pipe 305. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model is described in detail below with reference to the drawings.

[0024] Figure 1 As shown in the sectional view of the overall structure of the utility model, the utility model provides a high-efficiency and accurate large-diameter double-suction pump test pipeline layout system, which comprises an inlet pipeline part 100, a test pipeline part 200, and an outlet pipeline part 300. Figure 1 As shown in the sectional view of the overall structure of the utility model, the utility model provides a high-efficiency and accurate large-diameter double-suction pump test pipeline layout system, which comprises an inlet pipeline part 100, a test pipeline part 200, and an outlet pipeline part 300.

[0025] The inlet pipeline part 100 and the outlet pipeline part 300 are respectively located at the inlet and the outlet of the entire system, and the test pipeline part 200 is located between the inlet pipeline part 100 and the outlet pipeline part 300.

[0026] The inlet pipeline part 100 comprises, in sequence from the direction of incoming water, a large-flow pre-pump 101, an inlet regulating valve 102, and a metal bellows 103.

[0027] The test pipeline part 200 comprises, in sequence from the direction of incoming water, an inlet variable-diameter pipe 201, an inlet pressure-taking pipe 202, a water pump to be measured 203, an outlet pressure-taking straight pipe 204, and an outlet variable-diameter pipe 205. Figure 1 The inlet variable-diameter pipe 201 in the utility model is an inlet eccentric cone pipe (see

[0028] The outlet pipeline part 300 comprises, in sequence from the direction of incoming water, a flow meter front steady flow straight pipe 301, an electromagnetic flow meter 302, a flow meter rear steady flow straight pipe 303, an outlet regulating valve 304, and an outlet elbow pipe 305.

[0029] The inlet metal bellows 103 in the utility model is an inlet metal bellows that can compensate for axial and radial displacement.

[0030] The pressure-taking position of the inlet pressure-taking pipe should be set downstream of the inlet variable-diameter pipe by 2D1, where D1 is the diameter of the inlet pressure-taking pipe.

[0031] The pressure-taking position of the outlet pressure-taking straight pipe should be ensured to be downstream of the outlet 2D2 of the outlet pressure-taking straight pipe, and at least a straight pipe section of 1D2 should be maintained after pressure taking, where D2 is the diameter of the outlet pressure-taking straight pipe.

[0032] At least 5D3 straight pipe section is guaranteed before the electromagnetic flowmeter, and at least 3D3 straight pipe section is guaranteed after the electromagnetic flowmeter, wherein D3 is the pipe diameter of the electromagnetic flowmeter.

[0033] The inlet pipeline part 100, the test pipeline part 200 and the outlet pipeline part 300 in the utility model are all supported by pipeline support and fastened by bolts on the tank iron of the test table, so that the vibration during testing is reduced.

[0034] In order to ensure the accuracy of pressure measurement, the pressure measurement position of the inlet pressure pipe should be arranged at the downstream of the variable diameter pipe by 2D1 (D1 is the diameter of the inlet pressure pipe). The pressure measurement position of the outlet pressure pipe should be arranged at the downstream of the outlet by 2D2, and at least 1D2 straight pipe section should be kept after pressure measurement (D2 is the diameter of the outlet pressure pipe).

[0035] In the embodiment of the utility model, in order to ensure the accuracy of flow measurement, at least 5D3 straight pipe section is guaranteed before the electromagnetic flowmeter, and at least 3D3 straight pipe section is guaranteed after the electromagnetic flowmeter (D3 is the pipe diameter of the electromagnetic flowmeter).

[0036] The following is a specific embodiment:

[0037] The test pipeline arrangement system can test the performance parameters of the water pump, such as flow, head, efficiency, cavitation, vibration and noise. According to different specifications and diameters of the water pump, the corresponding test pipeline part is designed. When testing different specifications and diameters of the water pump, only the corresponding inlet and outlet variable diameter pipes and pressure pipes need to be replaced. The inlet metal bellows can compensate the axial and radial displacement (for example, the metal bellows with DN=1400mm and L=1000mm can compensate 200mm axial / radial displacement according to the reply of the manufacturer). For example, the inlet pipeline part is DN1400, the outlet pipeline part is DN1200, and a double-suction pump with inlet DN1200 and outlet DN1000 needs to be measured. The test pipeline needs to be adjusted as follows: DN1400-DN1200 variable diameter pipe, DN1200 inlet pressure straight pipe, measured water pump, DN1000 outlet pressure straight pipe, DN1000-DN1200 outlet variable diameter pipe, and the rest of the pipeline does not need to be adjusted. In this way, not only the accuracy of the test can be ensured and the vibration of the pipeline can be reduced, but also the adaptability of the pipeline can be improved, and the test efficiency and precision can be improved.

[0038] In the specific implementation process, the above parameter range can be replaced by other data range according to the specific field use requirements.

[0039] When testing different specifications of the water pump, the inlet pipeline part and the outlet pipeline part of the test pipeline do not need to be replaced, and the test pipeline part can be flexibly adjusted according to different test pumps. And each part can be supported by pipeline support and fastened by bolts on the tank iron of the test table, so that the vibration during testing is reduced.

[0040] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency precise large-diameter double-suction pump test pipeline arrangement system, characterized in that: The high-efficiency and precise large-diameter double-suction pump test pipeline arrangement system comprises an inlet pipeline part, a test pipeline part and an outlet pipeline part; the inlet pipeline part, the test pipeline part and the outlet pipeline part are fixed on a test table; The inlet pipeline part and the outlet pipeline part are respectively located at the inlet and the outlet of the whole system, and the test pipeline part is located between the inlet pipeline part and the outlet pipeline part; The inlet pipeline part comprises, in the direction of water inflow, a large-flow pre-pump, an inlet regulating valve and a metal bellows in sequence; The test pipeline part comprises, in the direction of water inflow, an inlet variable-diameter pipe, an inlet pressure tapping pipe, a water pump to be tested, an outlet pressure tapping straight pipe and an outlet variable-diameter pipe in sequence; The outlet pipeline part comprises, in the direction of water inflow, a flowmeter front steady flow straight pipe, an electromagnetic flowmeter, a flowmeter rear steady flow straight pipe, an outlet regulating valve and an outlet elbow in sequence.

2. The high-efficiency precision large-diameter double-suction pump test piping layout system according to claim 1, characterized in that: The inlet metal bellows is an inlet metal bellows capable of compensating axial and radial displacement.

3. The high-efficiency precision large-diameter double-suction pump test piping layout system according to claim 1, characterized in that: The inlet pipeline part, the test pipeline part and the outlet pipeline part are all supported by pipeline supports and fastened on the grooved iron of the test table by bolts.

4. The high efficient and accurate large-diameter double-suction pump test piping layout system according to claim 1, characterized in that: The inlet variable-diameter pipe is an inlet eccentric cone pipe.

5. The high efficient and accurate large-diameter double-suction pump test piping layout system according to claim 1, characterized in that: The pressure tapping position of the inlet pressure tapping pipe should be set downstream of 2D1 after the inlet variable-diameter pipe, wherein D1 is the diameter of the inlet pressure tapping pipe.

6. The high efficient and accurate large-diameter double-suction pump test piping layout system according to claim 1, characterized in that: The pressure tapping position of the outlet pressure tapping straight pipe should be ensured to be downstream of the outlet 2D2 of the outlet pressure tapping straight pipe, and at least 1D2 of the straight pipe section should be kept after pressure tapping, wherein D2 is the diameter of the outlet pressure tapping straight pipe.

7. The high efficient and accurate large-diameter double-suction pump test piping layout system according to claim 1, characterized in that: At least 5D3 of the straight pipe section should be ensured before the electromagnetic flowmeter, and at least 3D3 of the straight pipe section should be ensured after the electromagnetic flowmeter; wherein D3 is the pipe diameter of the electromagnetic flowmeter.

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