Marine centrifugal water pump assembly and engine outer circulation system thereof

Abstract

The utility model discloses a marine centrifugal water pump assembly and an engine external circulation system thereof, which comprise a centrifugal water pump, the centrifugal water pump is provided with a pump water inlet and a pump water outlet, the pump water outlet is fixedly connected with a water outlet storage container, and the pump water inlet is fixedly connected with a water inlet storage container. The water outlet storage container and the water inlet storage container can be communicated with the centrifugal water pump, the water outlet storage container is connected with a first water adding opening and a water outlet pipe, a water adding switch is arranged between the first water adding opening and the water outlet storage container, the water inlet storage container is connected with a water inlet pipe, and a one-way valve is arranged at a pump water inlet of the centrifugal water pump. Water-free dry grinding operation of the centrifugal water pump when the ship leaves the water surface is avoided, and then the centrifugal water pump can be prevented from being damaged due to water-free lubrication and cooling.

Description

Technical Field

[0001] The utility model relates to the technical field of water circulation cooling systems for ship engines, in particular to a marine centrifugal water pump assembly and an engine external circulation system thereof. Background Art

[0002] When the ship is working, the engine and auxiliary equipment on the ship (gearbox, hydraulic equipment, etc.) will emit a lot of heat. In order to ensure that the engine and auxiliary equipment work within the normal temperature range and prevent the engine from overheating and burning, and the auxiliary equipment from working abnormally due to high temperature, the engine and auxiliary equipment need to be cooled. The cooling method mainly uses a water circulation cooling system to cool down the engine and auxiliary equipment to take away the excess heat from the engine and auxiliary equipment, thereby protecting the engine and auxiliary equipment.

[0003] When the diesel engine on the ship is working, the centrifugal water pump on the ship needs to pump water from the river or the sea to the heat exchanger and intercooler of the diesel engine as a cooling medium, and then discharge it back to the sea. When the ship leaves the water, the centrifugal water pump cannot suck water. Centrifugal water pumps in the prior art are basically prohibited from running without water, because running without water will cause damage to components such as water seals.

[0004] Ships used for rescue boats / lifeboats are generally carried to the distressed area by large ocean rescue mother ships and lowered to the sea surface in a pre-specified manner. This requires that ships used for rescue boats / lifeboats need to have the ability to operate out of the water for a certain period of time (generally 5 minutes). In order to avoid the problem of dry grinding caused by the operation of the centrifugal water pump after the ship leaves the water, it is necessary to optimize the existing centrifugal water pump structure and make corresponding changes to the external circulation system of the marine engine. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a marine centrifugal water pump assembly and its engine external circulation system, so as to avoid the centrifugal water pump from running dry without water when the ship leaves the water surface, thereby avoiding the centrifugal water pump from being damaged due to waterless lubrication and cooling.

[0006] In order to solve the above technical problems, the utility model provides a marine centrifugal water pump assembly, including a centrifugal water pump, wherein the centrifugal water pump is provided with a pump water inlet and a pump water outlet.

[0007] The pump water outlet is fixedly connected to a water outlet storage container, and the pump water inlet is fixedly connected to a water inlet storage container. The water outlet storage container and the water inlet storage container can be communicated with the centrifugal water pump. The water outlet storage container is connected to a first water inlet and a water outlet pipe, a water inlet switch is arranged between the first water inlet and the water outlet storage container, the water inlet storage container is connected to a water inlet pipe, and a one-way valve is arranged at the pump water inlet of the centrifugal water pump.

[0008] Preferably: an anti-siphon valve is fixedly connected to the water outlet and water storage container.

[0009] Preferably: the water inlet and water storage container is connected to a second water inlet, and a water adding switch is provided between the second water inlet and the water inlet and water storage container.

[0010] Preferably: the water outlet of the water inlet and water storage container is provided with a first connecting flange, the water inlet of the pump is provided with a second connecting flange corresponding to the first connecting flange, and the first connecting flange and the second connecting flange are fixedly connected by bolts and nuts.

[0011] Preferably, the water inlet of the water inlet and water storage container is located higher than the water outlet of the water inlet and water storage container.

[0012] Preferably: the volume of the water inlet storage container is ≥ the volume of water stored in the centrifugal water pump.

[0013] Preferably: the water inlet of the water outlet storage container is provided with a third connecting flange, the water outlet of the pump is provided with a fourth connecting flange corresponding to the third connecting flange, and the third connecting flange is fixedly connected to the fourth connecting flange by bolts and nuts.

[0014] The present application also provides an engine external circulation system, including the above-mentioned marine centrifugal water pump assembly.

[0015] Preferably, the engine external circulation system comprises an external circulation water main water inlet pipeline and an external circulation water main water outlet pipeline, the water inlet pipe is connected to the external circulation water main water inlet pipeline, and the water outlet pipe is connected to the external circulation water main water outlet pipeline.

[0016] Preferably, the water inlet of the external circulation water main water inlet pipeline is arranged at the seabed door of the ship, and the water outlet of the external circulation water main water outlet pipeline is arranged on the ship's side.

[0017] After adopting the above technical solution, the beneficial effects of the utility model are:

[0018] The utility model discloses a marine centrifugal water pump assembly, comprising a centrifugal water pump, wherein the centrifugal water pump is provided with a pump water inlet and a pump water outlet, the pump water outlet is fixedly connected with a water outlet water storage container, the pump water inlet is fixedly connected with a water inlet water storage container, the water outlet water storage container and the water inlet water storage container can be communicated with the centrifugal water pump, the water outlet water storage container is connected with a first water adding port and a water outlet pipe, a water adding switch is provided between the first water adding port and the water outlet water storage container, the water inlet water storage container is connected with a water inlet pipe, and a one-way valve is provided at the water inlet of the centrifugal water pump.

[0019] When the centrifugal water pump assembly is installed on the rescue boat / lifeboat, water is added to the centrifugal water pump assembly before it is lowered to the sea. Before the diesel engine is started, the first water adding switch is turned on, and water is added to the water outlet storage container through the first water adding port, and the water fills the inner cavity of the centrifugal water pump and the water outlet storage container at the same time. At this time, due to the effect of the one-way valve at the water inlet of the pump, water cannot flow out through the pump water inlet of the centrifugal water pump. At this time, the diesel engine is started, and the diesel engine drives the centrifugal water pump to operate. Since the rescue boat / lifeboat is out of the water (because it has not been lowered to the sea), due to the effect of the one-way valve at the water inlet of the pump, no water enters the centrifugal water pump, and a continuous water flow cannot be formed. The water in the inner cavity of the centrifugal water pump and the water outlet storage container always stays in the inner cavity of the centrifugal water pump and the water outlet storage container. The water seal, impeller and other parts of the centrifugal water pump are always immersed in water and will not be damaged due to lack of water lubrication and cooling. When the centrifugal water pump is working, negative pressure will be formed at the water inlet of the pump. At this time, the negative pressure will cause the one-way valve to open. Due to the lack of continuous water flow, some water may flow into the water inlet storage container through the open one-way valve. The function of the water inlet storage container at this time is to store this part of water and prevent it from flowing out of the ship.

[0020] The marine centrifugal water pump assembly and its engine external circulation system of the utility model can ensure that the inner cavity of the centrifugal water pump is also filled with water when the ship leaves the water surface, and ensure that the impeller, bearing, water seal and other parts of the centrifugal water pump are sufficiently lubricated and cooled. It avoids the centrifugal water pump from running dry without water when the ship leaves the water surface, and thus can avoid the centrifugal water pump from being damaged due to lack of water lubrication and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a first embodiment of a marine centrifugal water pump assembly of the utility model;

[0022] Figure 2 This is a structural schematic diagram of a second embodiment of a marine centrifugal water pump assembly of the utility model;

[0023] In the figure:

[0024] 1. Centrifugal water pump; 101. Pump water inlet; 102. Pump water outlet; 2. Water outlet storage container; 201. First water inlet; 202. Water outlet pipe; 203. First water inlet switch; 3. Water inlet storage container; 301. Water inlet pipe; 302. Second water inlet; 303. Second water inlet switch; 4. Anti-siphon valve. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the utility model, but it is not intended to limit the scope of protection of the claims attached to the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In addition, although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0028] Embodiment 1:

[0029] The utility model discloses some embodiments, such as Figure 1 The marine centrifugal water pump assembly shown includes a centrifugal water pump 1, which is provided with a pump water inlet 101 and a pump water outlet 102. The pump water outlet 102 is fixedly connected to a water outlet storage container 2, and the pump water inlet 101 is fixedly connected to a water inlet storage container 3. The water outlet storage container 2 and the water inlet storage container 3 can be communicated with the centrifugal water pump 1. The water outlet storage container 2 is connected to a first water inlet 201 and a water outlet pipe 202. A water inlet switch is provided between the first water inlet 201 and the water outlet storage container 2, which is recorded as the first water inlet switch 203. The water inlet storage container 3 is connected to a water inlet pipe 301. A one-way valve is provided at the pump inlet 101 of the centrifugal water pump 1.

[0030] When the centrifugal water pump assembly of the utility model is installed on a rescue boat / lifeboat, water is added to the centrifugal water pump assembly before it is lowered to the sea, and before the diesel engine is started, the first water adding switch 203 is turned on, and water is added to the water outlet storage container 2 through the first water adding port 201, and the water simultaneously fills the inner cavity of the centrifugal water pump 1 and the water outlet storage container 2. At this time, due to the effect of the one-way valve at the pump water inlet 101, water cannot flow out through the pump water inlet 101 of the centrifugal water pump 1. At this time, the diesel engine is started, and the diesel engine drives the centrifugal water pump 1 to operate. Since the rescue boat / lifeboat is out of water (because it has not been lowered to the sea surface), due to the effect of the one-way valve at the pump water inlet 101, no water enters the centrifugal water pump 1, and a continuous water flow cannot be formed. The water in the inner cavity of the centrifugal water pump 1 and the water outlet storage container 2 remains in the inner cavity of the centrifugal water pump 1 and the water outlet storage container 2. The water seal, impeller and other parts of the centrifugal water pump 1 are always immersed in water and will not be damaged due to the lack of water lubrication and cooling.

[0031] When the centrifugal water pump 1 is working, negative pressure will be formed at the pump water inlet 101. At this time, the negative pressure will cause the one-way valve to open. Due to the lack of continuous water flow, part of the water may flow to the water inlet storage container 3 through the opened one-way valve. The function of the water inlet storage container 3 at this time is to store this part of the water to prevent it from flowing out of the ship.

[0032] In some embodiments, both the outgoing water storage container 2 and the incoming water storage container 3 are water storage tanks.

[0033] In some embodiments, an anti-siphon valve 4 is fixedly connected to the outlet water storage container 2. The anti-siphon valve 4 on the outlet water storage container 2 is to prevent the siphon phenomenon, that is, to prevent the siphon from sucking water out of the outlet water storage container 2 and the centrifugal water pump due to reasons such as pipeline layout.

[0034] In some embodiments, the water inlet of the water inlet storage container 3 is located higher than the water outlet of the water inlet storage container 3, and the water inlet storage container 3 is located higher than the centrifugal water pump 1 as much as possible to ensure that the centrifugal water pump 1 is always full of water. The volume of the water inlet storage container 3 is ≥ the volume of water stored in the centrifugal water pump 1, so as to ensure the water storage capacity of the centrifugal water pump 1 when storing water.

[0035] In some embodiments, the water outlet of the water inlet and water storage container 3 is provided with a first connection flange, and the pump water inlet 101 is provided with a second connection flange corresponding to the first connection flange, and the first connection flange and the second connection flange are fixedly connected by bolts and nuts, so as to facilitate the installation and removal of the water outlet of the water inlet and water storage container 3 and the pump water inlet 101.

[0036] In some embodiments, the water inlet of the water outlet storage container 2 is provided with a third connection flange, and the pump outlet 102 is provided with a fourth connection flange corresponding to the third connection flange, and the third connection flange and the fourth connection flange are fixedly connected by bolts and nuts. It is convenient to install and disassemble the water inlet of the water outlet storage container 2 and the pump outlet 102.

[0037] When the centrifugal water pump assembly of the utility model is installed on the rescue boat / lifeboat, water is added to the centrifugal water pump assembly before it is lowered to the sea, so that water is stored in the inner cavity of the centrifugal water pump. At the same time, the centrifugal water pump assembly of the utility model has a larger water storage capacity than the centrifugal water pump and pipeline system used in conventional ships, and when the ship contacts the water surface again, the water absorption capacity will be stronger. It avoids the rescue boat / lifeboat being unable to absorb water due to insufficient self-priming capacity of the centrifugal water pump when it is put into contact with the water surface. There is no need to manually add water to the centrifugal water pump after the rescue boat / lifeboat is put into contact with the water surface, which saves time and ensures timely rescue.

[0038] In a specific embodiment, an engine external circulation system provided by the embodiment scheme of the present application includes the above-mentioned marine centrifugal water pump assembly. The engine external circulation system also includes an external circulation water main water inlet pipeline and an external circulation water main water outlet pipeline, the water inlet pipe 301 is connected to the external circulation water main water inlet pipeline, and the water outlet pipe 202 is connected to the external circulation water main water outlet pipeline. The water inlet of the external circulation water main water inlet pipeline is arranged at the seabed gate of the ship. The water outlet of the external circulation water main water outlet pipeline is arranged on the ship's side. The seawater introduced from the outside of the harbour must enter the external circulation water main water inlet pipeline through the seabed gate of the ship, and the water is pumped into the external circulation pipeline of the engine through the centrifugal water pump assembly to cool the engine, and the water after cooling the engine is discharged to the outside of the ship's side through the pipeline.

[0039] The centrifugal water pump assembly of the utility model adds simple components such as a water storage container on the basis of the existing centrifugal water pump, so as to achieve the purpose of allowing the ship to operate normally even out of the water. There is no need to design and add complex control systems and control logic such as electronic control systems and program algorithms, nor is there any need to provide additional power supplies. It has a simple structure, low cost and greater reliability.

[0040] Embodiment 2:

[0041] The structure of the second embodiment is mostly the same as that of the first embodiment, and the only difference is that:

[0042] like Figure 2The water inlet and water storage container 3 is connected to a second water inlet 302, and a water adding switch is provided between the second water inlet 302 and the water inlet and water storage container 3, which is recorded as the second water adding switch 303. Water can be added to the water outlet and water storage container 2 through the first water inlet 201, and water can be added to the water inlet and water storage container 3 through the second water inlet 302, so as to ensure that when the rescue boat / lifeboat leaves the water surface, the inner cavity of the centrifugal water pump is also filled with water, and then the water seal, impeller and other parts of the centrifugal water pump are always immersed in water, so as to avoid dry grinding without water when the centrifugal water pump is running, and ensure that the centrifugal water pump will not be damaged due to waterless lubrication and cooling.

[0043] The marine centrifugal water pump assembly and its engine external circulation system of the utility model can ensure that the inner cavity of the centrifugal water pump is also filled with water when the ship leaves the water surface, and ensure that the impeller, bearing, water seal and other parts of the centrifugal water pump are sufficiently lubricated and cooled. It avoids the centrifugal water pump from running dry without water when the ship leaves the water surface, and thus can avoid the centrifugal water pump from being damaged due to lack of water lubrication and cooling.

[0044] The present invention is not limited to the above embodiments, and all improvements made based on the concept, principle, structure and method of the present invention are within the protection scope of the present invention.

Claims

1. A marine centrifugal water pump assembly, comprising a centrifugal water pump, wherein the centrifugal water pump is provided with a pump water inlet and a pump water outlet, and is characterized in that: The pump water outlet is fixedly connected to a water outlet storage container, and the pump water inlet is fixedly connected to a water inlet storage container. The water outlet storage container and the water inlet storage container can be communicated with the centrifugal water pump. The water outlet storage container is connected to a first water inlet and a water outlet pipe, a water inlet switch is arranged between the first water inlet and the water outlet storage container, the water inlet storage container is connected to a water inlet pipe, and a one-way valve is arranged at the pump water inlet of the centrifugal water pump.

2. The marine centrifugal water pump assembly according to claim 1, characterized in that: An anti-siphon valve is fixedly connected to the water outlet and water storage container.

3. The marine centrifugal water pump assembly according to claim 1, characterized in that: The water inlet and water storage container is connected with a second water adding port, and a water adding switch is arranged between the second water adding port and the water inlet and water storage container.

4. The marine centrifugal water pump assembly according to claim 1, characterized in that: The water outlet of the water inlet and water storage container is provided with a first connecting flange, and the water inlet of the pump is provided with a second connecting flange corresponding to the first connecting flange, and the first connecting flange and the second connecting flange are fixedly connected by bolts and nuts.

5. The marine centrifugal water pump assembly according to claim 4, characterized in that: The water inlet of the water inlet and water storage container is located higher than the water outlet of the water inlet and water storage container.

6. The marine centrifugal water pump assembly according to claim 1, characterized in that: The volume of the water inlet storage container is ≥ the volume of water stored by the centrifugal water pump.

7. The marine centrifugal water pump assembly according to claim 1, characterized in that: The water inlet of the water outlet storage container is provided with a third connecting flange, and the water outlet of the pump is provided with a fourth connecting flange corresponding to the third connecting flange, and the third connecting flange is fixedly connected to the fourth connecting flange by bolts and nuts.

8. An engine external circulation system, characterized in that: It comprises a marine centrifugal water pump assembly as described in any one of claims 1 to 7.

9. The engine external circulation system according to claim 8, characterized in that: The engine external circulation system comprises an external circulation water main water inlet pipeline and an external circulation water main water outlet pipeline, the water inlet pipe is connected to the external circulation water main water inlet pipeline, and the water outlet pipe is connected to the external circulation water main water outlet pipeline.

10. The engine external circulation system according to claim 9, characterized in that: The water inlet of the external circulation water main water inlet pipeline is arranged at the seabed door of the ship, and the water outlet of the external circulation water main water outlet pipeline is arranged on the ship's side.

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