CN202273842U - Test device for large-size centrifugal type cargo oil pump - Google Patents

Abstract

The utility model relates to a special test system for a large pump cabin type and centrifugal type marine cargo oil pump, in particular to a large centrifugal type cargo oil pump test for a pump cabin type cargo oil pump with a flow rate greater than 1500m ³ /h and a pressure head greater than 100m The device overcomes that the existing technology cannot meet the requirements of variable speed and the requirement that the installation form conforms to the actual situation. The tested cargo oil pump (15) is placed vertically and forwardly above the tested cargo oil pump (15). The lower flange (29), the speed torque meter (28), the upper flange (27) and the frequency conversion high-voltage motor (16) are connected in sequence to provide a simple structure, variable speed drive, and the installation state of the cargo oil pump in the test. The large-scale centrifugal cargo oil pump test device, which is consistent with the installation on the oil tanker, drives the cargo oil pump to run at the set speed, and can detect whether the cargo oil pump is competent for the two tasks of unloading and stripping.

Description

A large centrifugal cargo oil pump test device

technical field

The utility model relates to a special test system for a large pump cabin type and centrifugal type marine cargo oil pump, in particular to a large centrifugal type cargo oil pump suitable for a pump cabin type cargo oil pump with a flow rate greater than 1500 m ³ /h and a pressure head greater than 100m test device.

Background technique

The cargo oil pump is a special equipment on the oil tanker. Its purpose is to transport the cargo oil in the tanker tank to the oil carrying equipment or oil depot on the wharf through the corresponding pipeline on the ship when the oil tanker is docked at the wharf. Because the volatilized oil gas of cargo oil is flammable, explosive and pollutes the environment, the safety and reliability of cargo oil pump is a very important issue during its operation. The safety and reliability of the cargo oil pump shall be guaranteed by the design, manufacture and use process respectively. In order to prevent the danger caused by oil and gas, in addition to using compartment seals to isolate the pump room and engine room, the requirements for the performance and reliability of cargo oil pumps are getting higher and higher. For example, it is stated in 5.1.1b) of GB3216-2005 "Hydraulic Performance Acceptance Test of Rotary Power Pump" that the test should be carried out on the test bench of the manufacturer's factory. At the same time, it is also proposed in 4.1 Environmental Conditions in GB10832-2008 "General Technical Conditions for Centrifugal Pumps and Vortex Pumps for Marine Use" that the pump should be able to work stably and reliably under the following marine conditions, which include temperature, humidity, tilting and vibration. These requirements of the national standard are to test the environmental adaptability of the cargo oil pump through product testing, not only as a decision basis for accepting or rejecting whether the product is qualified, but also to find products with potential defects, thereby improving the quality of the cargo oil pump. reliability.

The large-scale centrifugal cargo oil pump test devices of our country's existing technology are all imported from abroad, and the cargo oil pump is driven by a constant speed motor and installed horizontally. Therefore, the test device of the prior art can not satisfy the two requirements of today's oil tanker to the cargo oil pump:

1. Cannot meet the requirements of variable speed

In recent years, due to the increase in size of oil tankers and the limitation and gradual shortening of the loading and unloading time of oil tankers at docks, the time for oil tankers to load and unload oil in ports generally does not exceed 20 hours. In this way, not only is it imperative to increase the size of the cargo oil pump, but also when unloading oil, the cargo oil pump should run at high speed and its flow rate should reach the maximum value; , it should be turned to low speed operation, and the oil in the oil storage tank is basically sucked up, so that the residual oil in the tank is small, so as to achieve a good stripping effect. That is, the motor-driven cargo oil pump can be flexibly adjusted in the range from rated speed to zero speed according to needs. Since the existing technology cannot meet the requirements of variable speed, it is difficult to detect whether the cargo oil pump is capable of performing the two tasks of unloading and stripping.

2. It cannot meet the requirement that the installation form conforms to the actual situation

The cargo oil pump is installed in a vertical structure on the oil tanker, and the horizontal and longitudinal length occupied is small, which is beneficial to shorten the total length of the engine pump room. And the test device of prior art, there is no limitation of total length, adopts horizontal type to be conducive to installation and adjustment. Because the prior art cannot meet the requirement that the installation form conforms to the actual situation, it cannot truly reflect the problems existing in the work of the cargo oil pump, leaving hidden dangers in product quality.

Contents of the invention

The purpose of this utility model is to overcome the existing technology can not meet the requirements of variable speed and can not meet the requirements of the installation form in line with the actual requirements, to provide a simple structure, variable speed drive, the installation state of the cargo oil pump in the test is the same as that installed on the oil tanker. Compliant large centrifugal cargo oil pump test device.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a large centrifugal cargo oil pump test device, including a console, a water suction pipe, an electric gate valve, a vacuum system, a tested cargo oil pump, an electromagnetic flowmeter, an electric butterfly valve, a drainage The pipeline, the water suction pipeline is connected to the electric gate valve, the electric gate valve is connected to the vacuum system, the vacuum system is connected to the water inlet of the tested cargo oil pump, the water outlet of the tested cargo oil pump is connected to the electric butterfly valve, and the electric butterfly valve is connected to the drainage pipe. The tested cargo oil pump is placed vertically and positively, and the transmission shaft system is connected above the tested cargo oil pump. The transmission shaft system is composed of an upper flange, a speed torque meter and a lower flange. Connecting to the lower flange, the upper and lower parts of the speed torque meter are respectively connected to the upper flange and the lower flange, and the upper flange is connected to the frequency conversion high-voltage motor.

The frequency conversion high-voltage motor is fixed on the stand, and the transmission shaft system and the tested cargo oil pump are combined into one.

An inlet pressure measuring ring is installed on the outside of the water suction pipe, and an outlet pressure measuring ring is installed on the outside of the drain pipe.

The first pipe support is installed on the water suction pipeline, and the second pipe support is installed on the drainage pipeline.

The frequency-variable high-voltage motor is controlled by a high-voltage frequency converter to realize frequency-variable speed regulation.

The vacuum system is equipped with an exhaust pipe.

Compared with the prior art, the beneficial effects of the utility model are as follows: 1. For simulating installation on a ship, a vertical stand and a transmission shaft system are specially designed to realize the vertical installation, drive and torque of the motor and the cargo oil pump. The measurement can truly reflect the problems existing in the work of the cargo oil pump, and can expose the hidden dangers of the product quality of the cargo oil pump. 2. The tested cargo oil pump is driven by a 1120kW high-voltage vertical frequency conversion motor. Under the control of the high-voltage frequency converter, the cargo oil pump is driven to run at the set speed, which can detect whether the cargo oil pump is competent for the two tasks of unloading and stripping.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the application site of the utility model.

Fig. 3 is a structural schematic diagram of the transmission shaft system of the present invention.

In the figure: pool 1, test device 2, high-voltage frequency converter 3, console 4, water suction pipe 5, pipe support 1 6, water suction pipe 4 7, water suction pipe 3 8, electric gate valve 9, water suction pipe 2 10, vacuum system 11. Water suction pipe 12, inlet pressure measuring ring 13, exhaust pipe 14, tested cargo oil pump 15, frequency conversion high-voltage motor 16, bench 17, rotating shafting 18, outlet pressure measuring ring 19, drain pipe 120, electromagnetic Flow meter 21, drain pipe 2 22, electric butterfly valve 23, pipe support 2 24, drain pipe 3 25, drain pipe 4 26, upper flange 27, rotational speed torque meter 28, and lower flange 29.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not intended to limit its protection scope.

Referring to Fig. 1, Fig. 2 and Fig. 3, the structure diagram of the utility model, a kind of large-scale centrifugal cargo oil pump test device, comprises console 4, suction pipe, electric gate valve 9, vacuum system 11, tested cargo oil pump 15, electromagnetic Flow meter 21) electric butterfly valve 23, drainage pipe, the water suction pipe is connected with electric gate valve 9, electric gate valve 9 is connected with vacuum system, vacuum system 11 is connected with water inlet of tested cargo oil pump 15, and water outlet of tested cargo oil pump 15 It is connected with the electric butterfly valve 23, and the electric butterfly valve 23 is connected with the drain pipe. The tested cargo oil pump 15 is placed vertically and forwardly, and the transmission shaft system 18 is connected above the tested cargo oil pump 15. The transmission shaft system 18 is controlled by the upper layer method. Lan 27, speed torque meter 28, and lower flange 29. The rotating shaft of the tested cargo oil pump 15 is connected to the lower flange 29. The upper and lower parts of the speed torque meter 28 are respectively connected to the upper flange 27 and the lower flange 29. , the upper flange 27 is connected with the variable frequency high voltage motor 16.

The frequency conversion high-voltage motor 16 is fixed on the stand 17, and the transmission shaft system 18 and the tested cargo oil pump 15 are combined into one.

The inlet pressure measuring ring 13 is equipped outside the described suction pipe-12 pipe, and the outlet pressure measuring ring 19 is equipped outside the drain pipe-20 pipe.

A pipe support one 6 is installed on the water suction pipeline, and a pipe support two 24 is installed on the drainage pipeline.

The variable-frequency high-voltage motor 16 is controlled by the high-voltage frequency converter 3 to realize variable-frequency speed regulation.

The vacuum system 11 is equipped with an exhaust pipe 14 .

In Fig. 1, the water suction pipe of the test device 2 of the present utility model is made up of water suction pipe five 5, pipe support one 6, water suction pipe four 7, water suction pipe three 8, water suction pipe two 10, water suction pipe one 12, and the drainage pipe consists of Drain pipe one 20, drain pipe two 22, pipe support two 24, drain pipe three 25, drain pipe four 26 form. Frequency conversion high-voltage motor 16, bench 17, transmission shaft system 18 and tested cargo oil pump 15 are combined into one, wherein frequency conversion high-voltage motor 16 is a vertical frequency conversion high-voltage motor with a rated power of 1120kW, and bench 17 simulates the actual situation of the cargo oil pump on board. In the installation environment, the upper flange 27 is used to connect the frequency conversion high-voltage motor 16, and the lower flange 29 is used to install the tested cargo oil pump 15. The alignment parameters can be adjusted to simulate good and bad transmission conditions under hull deformation. The transmission shaft system 18 is composed of an upper flange 27, a speed torque meter 28 and a lower flange 29. The speed torque meter 28 is coaxial with the frequency conversion high-voltage motor 16. While driving, the oil pump 15 of the tested cargo can be measured. The input speed and torque are transmitted to the console 4 for monitoring and recording, and the lower flange 29 is matched with the stand 17 for simulating good and bad transmission conditions under hull deformation. The vacuum system 11 can provide water diversion function before the tested cargo oil pump 15 is running and tested. During the running and testing process of the tested cargo oil pump 15, it can discharge the pipe 14 to remove the residual or precipitated air in the pipeline, so as to ensure the quality of the inlet water flow. .

The suction port of the water suction pipe 5 is submerged in the pool 1, which is the water inlet end of the test device 2 of the present utility model, and enters the electric gate valve 9 through the water suction pipe 4 7 and the water suction pipe 3 8, and the electric gate valve 9 can be manually or remotely adjusted steplessly, changing The inlet pressure head of the tested cargo oil pump 15 is used to measure the cavitation allowance of the tested cargo oil pump 15 under various working conditions.

The water flow passes through the water suction pipe 2 10 and the vacuum system 11 to discharge the gas, and then enters the water suction pipe 1 12. The inlet pressure measuring ring 13 provided on the water suction pipe 12 can lead the static pressure of the water flow to the console 4, thereby Obtain the inlet pressure of the tested cargo oil pump 15. Similarly, the outlet pressure measuring ring 19 provided on the discharge pipe one 20 can measure the outlet pressure of the tested cargo oil pump 15 .

The electromagnetic flowmeter 21 can measure the flow at the outlet of the tested cargo oil pump 15 and send a message to the console 4 . Water flows through the drain pipe 22 and enters the electric butterfly valve 23. The electric butterfly valve 23 can be manually or remotely adjusted steplessly to change the outlet damping of the tested pump 15, that is, the outlet flow rate, thereby obtaining the performance curve of the tested cargo oil pump 15 under various working conditions. Water flow enters the pool 1 through drainpipe three 25 and drainpipe four 26 again.

In Fig. 2, the power of the tested cargo oil pump 15 is 1120kW, the flow rate is 2000 m ³ /h, and the pressure head is 120m. The field of use includes a pool 1, a test device 2, a high-voltage frequency converter 3, and a console 4.

It can be seen from the above that the utility model can be used to realize the vertical installation, drive and torque measurement of the motor and the cargo oil pump. Under the control of the high-voltage frequency converter and the frequency conversion motor, the cargo oil energy pump runs at the set speed to realize the full working condition Performance parameter measurement. the

Claims (6)

1. large centrifugal cargo oil pump testing apparatus; Comprise operating console (4), suction piping, electric gate valve (9), vacuum system (11), tried cargo oil pump (15), electromagnetic flowmeter (21), electric butterfly valve (23), drainage pipe; Described suction piping is connected with electric gate valve (9); Electric gate valve (9) is connected with vacuum system; Vacuum system (11) is connected with quilt examination cargo oil pump (15) water intake, is tried cargo oil pump (15) water outlet to be connected with electric butterfly valve (23), and electric butterfly valve (23) is connected with drainage pipe; It is characterized in that: described by vertically forward placement of examination cargo oil pump (15); Connected drive line (18) by the top of examination cargo oil pump (15), drive line (18) is made up of upper strata flange (27), rotational speed and torque appearance (28), lower floor's flange (29), and the rotatingshaft that is tried cargo oil pump (15) is connecting lower floor's flange (29); The upper and lower of rotational speed and torque appearance (28) connects upper strata flange (27), lower floor's flange (29) respectively, and upper strata flange (27) is connected with variable-frequency high-voltage motor (16).

2. a kind of large centrifugal cargo oil pump testing apparatus according to claim 1, it is characterized in that: described variable-frequency high-voltage motor (16) is fixed on the stand (17), and is combined into one with drive line (18) with by examination cargo oil pump (15).

3. a kind of large centrifugal cargo oil pump testing apparatus according to claim 1 is characterized in that: the outer inlet pressure measurement ring (13) that is equipped with of described suction sleeve one (12) pipe, the outer outlet pressure measurement ring (19) that is equipped with of waste pipe one (20) pipe.

4. a kind of large centrifugal cargo oil pump testing apparatus according to claim 1 is characterized in that: pipe holder one (6) is installed on the described suction line, pipe holder two (24) is installed on the discharge pipe line.

5. a kind of large centrifugal cargo oil pump testing apparatus according to claim 1 is characterized in that: described variable-frequency high-voltage motor (16) receives high voltage converter (3) control, realizes frequency control of motor speed.

6. a kind of large centrifugal cargo oil pump testing apparatus according to claim 1, it is characterized in that: described vacuum system (11) is equipped with outlet pipe (14).

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