A circulating water system water tunnel test device and method

Abstract

The application provides a circulating water system water tunnel test device, which comprises a test object, a guarantee water pump, a guarantee pipeline, a water storage pool and a rectangular test section; the test object is fixedly installed on the rectangular test section and is communicated with the inside of the rectangular test section; one end of the rectangular test section is communicated with the water storage pool; the other end of the rectangular test section is communicated with the guarantee pipeline through a special-shaped pipe; the guarantee water pump is installed on the guarantee pipeline; the other end of the guarantee pipeline is communicated with the water storage pool; the device not only has short test time and low requirement on the area of the water pool, but also can make the test object static by using the relative motion principle, guarantee the simulation of the flow velocity of the water, simulate the actual running state of the circulating water system during the driving process of the ship under the marine environment, obtain the data of the flow characteristics of the inside of the test object and determine that the cooling water provided by the actual circulating water system can meet the requirement of the equipment such as the condenser.

Description

Technical Field

[0001] This invention belongs to the field of ship circulating water system testing technology, and specifically relates to a water tunnel testing device and method for circulating water systems. Background Technology

[0002] Modern ships often use circulating water systems to provide cooling water for equipment such as condensers. Circulating water systems include inlets, pumps, valves, and other piping and accessories. They can meet the cooling water needs under certain operating conditions through gravity flow, allowing the circulating water pumps to start only under certain conditions. This reduces the size and weight of the equipment and improves the system's operating efficiency and reliability.

[0003] For the newly developed circulating water system, data on its internal flow characteristics are lacking, making it impossible to determine whether the cooling water it provides can meet the needs of equipment such as condensers. Previously, the flow characteristics of circulating water systems were typically tested by towing the test object. However, to simulate actual ship speeds and obtain sufficient test data, towing the test object requires a considerable amount of time and a large pool area, making it difficult to find suitable testing conditions domestically. Summary of the Invention

[0004] To address the problems of the prior art, embodiments of the present invention provide a water tunnel testing device and method for a circulating water system.

[0005] According to one aspect of the present invention, a water tunnel testing device for a circulating water system is provided, comprising a test object, a backup pump, a backup pipeline, a water storage tank, and a rectangular test section. The test object is fixedly installed on the rectangular test section and connected to the interior of the rectangular test section. One end of the rectangular test section leads to the water storage tank, and the other end is connected to the backup pipeline through a special-shaped pipe. The backup pump is installed on the backup pipeline, and the other end of the backup pipeline is connected to the water storage tank.

[0006] Preferably, the test object is equipped with a regulating valve, a pressure sensor, and a non-contact flow sensor. The pressure sensor is installed at the inlet and outlet of the test object, the regulating valve is used to control the flow resistance within the test object, and the non-contact flow sensor is used to measure the flow rate through the test object.

[0007] Preferably, the width of the rectangular test section is three times the width of the estuary, and the height is twice the height of the estuary.

[0008] Preferably, an exhaust hole is provided at the highest point of the test object, and the exhaust hole is sealed with bolts.

[0009] Preferably, before the test, the water level in the storage tank is higher than the highest point of the test object.

[0010] The application also provides a water tunnel test method of a circulating water system, comprising the following steps:

[0011] S1, before the test, opening the guarantee water pump to make the guarantee water pump run at low speed, opening the exhaust hole, then filling water into the water storage pool to make the water level of the water storage pool higher than the highest point of the test object, the water in the water storage pool enters the test object through the exhaust hole, and the exhaust hole is blocked by a bolt after the test object is filled with water;

[0012] S2, adjusting the power and rotating speed of the guarantee water pump to make the water flow rate in the rectangular test section reach the corresponding sailing speed of the test working condition, obtaining the inlet and outlet pressures of the test object through the pressure sensor, and adjusting the opening degree of the regulating valve to make the resistance of the test object reach the corresponding resistance value of the test working condition;

[0013] S3, after running for 15 minutes, recording the flow rate of the guarantee water pump, the inlet and outlet pressures of the test object and the flow rate of the test object.

[0014] The application has the following beneficial effects:

[0015] As can be seen from the above scheme, the application provides a water tunnel test device and method of a circulating water system, which not only has short test time and low requirement on the area of the water pool, but also can use the relative motion principle to make the test object static, guarantee the water flow rate to simulate the sailing speed, simulate the actual running state of the circulating water system in the process of ship sailing in the marine environment, so that the self-flowing flow rate of the circulating water system under different sailing speeds can be obtained, the resistance characteristics of the circulating water system can be analyzed, the lift provided by the circulating water pump can be obtained, the risk of the circulating water system on the ship can be resolved, and the data of the internal flow characteristics of the test object obtained through the test can be used to determine that the cooling water provided by the actual circulating water system can meet the requirements of the condenser and other equipment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 Fig. 1 shows a structure schematic diagram of a water tunnel test device of a circulating water system according to an embodiment of the application;

[0017] Fig. 2 Fig. 2 shows a side view of a test object according to an embodiment of the application;

[0018] Fig. 3 Fig. 3 shows a top view of a test object according to an embodiment of the application.

[0019] In the figure, 1 is a test object; 2 is a guarantee water pump; 3 is a guarantee pipeline; 4 is a water storage pool; 5 is a rectangular test section; 6 is a special-shaped pipe; 7 is a regulating valve; 8 is a pressure sensor; and 9 is a non-contact flow sensor. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] Example

[0022] like Figs. 1 to 3 As shown, the present invention provides a water tunnel test device for a circulating water system, including a test object 1, a backup water pump 2, a backup pipeline 3, a water storage tank 4, and a rectangular test section 5. The test object 1 is a circulating water system model, and the inlet and outlet structures of the circulating water system model are consistent with those of the actual circulating water system. The dimensions of the circulating water system model satisfy a similar proportional relationship with the dimensions of the actual circulating water system. The test object 1 is fixedly installed on the rectangular test section 5 by welding and is connected to the interior of the rectangular test section 5. One end of the rectangular test section 5 leads to the water storage tank 4, and the other end is connected to the backup pipeline 3 through a special-shaped pipe 6. The backup water pump 2 is installed on the backup pipeline 3, and the other end of the backup pipeline 3 is connected to the water storage tank 4.

[0023] Furthermore, the test object 1 is equipped with a regulating valve 7, a pressure sensor 8, and a non-contact flow sensor 9. The pressure sensor 8 is installed at the inlet and outlet of the test object 1 and is used to measure the inlet and outlet pressures of the test object 1 to obtain the resistance of the test object 1. The regulating valve 7 is used to control the magnitude of the flow resistance within the test object 1. The non-contact flow sensor 9 is used to measure the flow rate through the test object 1. The actual circulating water system includes equipment such as pipes, condensers, gate valves, and circulating water pumps. Since the experiment only focuses on flow resistance characteristics, the resistance of the above equipment can be simulated by the regulating valve 7, and the magnitude of its flow resistance can be controlled by the opening of the regulating valve 7. Therefore, only the regulating valve 7 needs to be installed to simulate the resistance of the above equipment, making the experimental process simple and easy to operate.

[0024] Furthermore, the upper wall of the rectangular test section 5 simulates the hull plate of a ship. The width of the rectangular test section 5 is three times the width of the sea passage, and the height is twice the height of the sea passage. The width and height of the rectangular test section 5 are large enough to eliminate the influence of the side walls and bottom boundary layer of the rectangular section on the gravity flow of the circulating water system model.

[0025] Furthermore, an exhaust hole is provided at the highest point of the test object 1, and the exhaust hole is sealed with bolts.

[0026] Furthermore, before the test, the water level in the water storage tank 4 was higher than the highest point of the test object 1.

[0027] Further, the guarantee water pump 2, the guarantee pipeline 3 and the water storage tank 4 provide a certain flow rate of guarantee water for the water tunnel, i.e. the rectangular test section 5, and by adjusting the rotating speed and power of the guarantee water pump 2, different flow rates of incoming flow are provided for the test object 1 to simulate different sailing speeds, and the flow rate can be changed according to the needs of test working conditions.

[0028] A water tunnel test method of a circulating water system, characterized in that the method comprises the following steps:

[0029] S1, before the test, the guarantee water pump 2 is started to run at a low speed, and at the same time, the exhaust hole is opened, then water is injected into the water storage tank 4, so that the water level of the water storage tank 4 is higher than the highest point of the test object 1, the water in the water storage tank 4 enters the test object 1 through the exhaust hole, and after the test object 1 is filled with water, the exhaust hole is blocked by using a bolt;

[0030] S2, the power and rotating speed of the guarantee water pump 2 are adjusted, so that the flow rate of water in the rectangular test section 5 reaches the sailing speed corresponding to the test working condition, the inlet and outlet pressures of the test object 1, i.e. the resistance of the test object 1, are obtained through the pressure sensor 8, and the resistance of the test object 1 reaches the resistance value corresponding to the test working condition by adjusting the opening degree of the regulating valve 7;

[0031] S3, after running for 15 minutes, the flow rate of the guarantee water pump 2, the inlet and outlet pressures of the test object 1 and the flow rate of the test object 1 are recorded;

[0032] S4, after the test is completed, the flow rate of the guarantee water pump 2, the inlet and outlet pressures of the test object 1 and the flow rate of the test object 1 under different test working conditions are measured in sequence by changing the power and rotating speed of the guarantee water pump 2.

[0033] The present application has the following beneficial effects:

[0034] (1) The test method is based on the principle of relative motion, and the test object is static by using the water tunnel, so that the test guarantee condition requirement is low and the test is easy to realize.

[0035] (2) The flow resistance of the circulating water pump, the condenser and the gate valve in the actual circulating water system is simulated by the regulating valve, and can be conveniently adjusted according to the needs of test working conditions, so that the test system is simplified.

[0036] (3) The test method can not only be used for studying the system free flow and flow resistance characteristics under different device resistance characteristics and different sailing speeds, but also can be used for studying the mutual influence between the two through-holes of the circulating water system.

[0037] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can also be made several improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A circulating water system water tunnel test apparatus characterized by comprising: The application relates to a circulating water system water tunnel test device, which comprises a test object (1), a guarantee water pump (2), a guarantee pipeline (3), a water storage pool (4) and a rectangular test section (5), wherein the test object (1) is fixedly installed on the rectangular test section (5) and communicates with the inside of the rectangular test section (5), one end of the rectangular test section (5) leads to the water storage pool (4), the other end is connected with the guarantee pipeline (3) through a special-shaped pipe (6), the guarantee pipeline (3) is provided with the guarantee water pump (2), and the other end of the guarantee pipeline (3) communicates with the water storage pool (4). An adjusting valve (7), a pressure sensor (8) and a non-contact flow sensor (9) are installed on the test object (1), the pressure sensor (8) is installed at the inlet and outlet of the test object (1), the adjusting valve (7) is used for controlling the flow resistance in the test object (1), and the non-contact flow sensor (9) is used for measuring the flow through the test object (1).

2. The recirculating water system tank test apparatus of claim 1, wherein The width of the rectangular test section (5) is 3 times the width of a sea opening, and the height of the rectangular test section (5) is 2 times the height of the sea opening.

3. The recirculating water system tank test apparatus of claim 1, wherein An exhaust hole is arranged at the highest point of the test object (1), and the exhaust hole is blocked by bolts.

4. The recirculating water system tank test apparatus of claim 1, wherein, Before the test, the water level of the water storage pool (4) is higher than the highest point of the test object (1).

5. A method of testing a water tunnel of a circulating water system, characterized by, The circulating water system water tunnel test device according to any one of claims 1-4 comprises the following steps: S1, before the test, the guarantee water pump (2) is started to run at a low speed, the exhaust hole is opened, then water is injected into the water storage pool (4) to make the water level of the water storage pool (4) higher than the highest point of the test object (1), the water in the water storage pool (4) enters the test object (1) through the exhaust hole, and the exhaust hole is blocked by bolts after the test object (1) is filled with water; S2, the power and rotating speed of the guarantee water pump (2) are adjusted to make the water flow speed in the rectangular test section (5) reach the corresponding sailing speed of a test working condition, the inlet and outlet pressures of the test object (1) are obtained through the pressure sensor (8), and the resistance of the test object (1) reaches the corresponding resistance value of the test working condition by adjusting the opening degree of the adjusting valve (7); S3, after 15 minutes, the flow of the guarantee water pump (2), the inlet and outlet pressures of the test object (1) and the flow of the test object (1) are recorded.

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