Horizontal shell-and-tube lubricating oil cooler for large nuclear power station

Abstract

The utility model relates to the field of lubricating oil coolers, in particular to a horizontal shell-and-tube type lubricating oil cooler for a large nuclear power station, and aims to solve the problems that a plate type lubricating oil cooler is high in price and easy to block, n coolers are stacked from top to bottom in the scheme, and oil ways of the n coolers are communicated with the outside through a six-way valve. The water chamber, the tube plate and the shell are sequentially connected and fixed, the tube bundle is arranged in the shell and inserted into the tube plate, a water chamber inlet and a water chamber outlet are sequentially formed in the side portion of the water chamber from top to bottom, two oil pipelines are arranged on the side portion of the shell, the oil pipelines of the two coolers are connected with the six-way valve, and an oil pipeline inlet and an oil pipeline outlet are formed in the six-way valve. The bottom of the shell of the cooler at the topmost part is provided with two supports, the tops and the bottoms of the shells of the other coolers are respectively provided with two supports, when n coolers are stacked, the bottom support of the cooler at the upper part and the top support of the cooler at the lower part are oppositely arranged, and the inner part of the scheme is not easy to block.

Description

Technical Field

[0001] The utility model relates to the field of lubricating oil coolers, in particular to a horizontal tube shell type lubricating oil cooler for a large nuclear power station. Background Art

[0002] The function of the lubricating oil cooler is to cool the lubricating oil and keep the oil temperature within the normal working range. On high-power reinforced engines, due to the large heat load, a lubricating oil cooler must be installed. When the engine is running, the viscosity of the oil becomes thinner as the temperature rises, which reduces the lubrication ability. Therefore, some engines are equipped with a lubricating oil cooler, which is used to reduce the oil temperature and maintain a certain viscosity of the lubricating oil. The lubricating oil cooler is arranged in the lubrication system circulation oil circuit.

[0003] Conventional large nuclear power plants generally use horizontal plate-type lubricating oil coolers. Plate-type lubricating oil coolers have many advantages such as small size, light weight, and simple structure, but they are expensive and prone to clogging. Utility Model Content

[0004] Purpose of this utility model patent: In order to solve the problem that the plate type lubricating oil cooler is expensive and prone to clogging, this utility model proposes a horizontal shell and tube lubricating oil cooler for large nuclear power plants.

[0005] The utility model is implemented through the following scheme:

[0006] A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, comprising n coolers and n-1 six-way valves, wherein the n coolers are stacked one by one from top to bottom, and the oil passages of the n coolers are connected to the outside through the six-way valves, wherein n≥2, and n is an integer;

[0007] Each cooler includes a water chamber, a tube sheet, a shell, an oil pipeline, a tube bundle and a support;

[0008] The water chamber, tube sheet and shell are connected and fixed in sequence, the tube bundle is arranged in the shell, and the tube bundle is inserted on the tube sheet. The side of the water chamber is provided with a water chamber inlet and a water chamber outlet from top to bottom, and the side of the shell is provided with two oil pipelines. The oil pipelines of the two coolers are connected to the six-way valve, and the six-way valve is provided with an oil pipeline inlet and an oil pipeline outlet. Two supports are installed at the bottom of the shell of the top cooler, and two supports are installed on the top and bottom of the shell of other coolers respectively. When n coolers are stacked, the bottom support of the upper cooler and the top support of the lower cooler are relatively arranged.

[0009] Furthermore, the water chamber inlet is arranged horizontally and is located above the center line of the water chamber; the water chamber outlet is arranged horizontally and is located below the center line of the water chamber.

[0010] Furthermore, the two oil pipelines are connected to the upper end of the side of the shell.

[0011] Furthermore, the oil pipeline inlet is located at the six-way valve close to the water chamber side, and the oil pipeline outlet is located at the six-way valve far from the water chamber side.

[0012] Furthermore, the oil pipeline connected to the oil pipeline inlet is connected to a position on the shell close to the tube sheet, and the oil pipeline connected to the oil pipeline outlet is connected to a position on the shell far from the tube sheet.

[0013] Beneficial effects:

[0014] The utility model proposes a horizontal shell and tube lubricating oil cooler for a large nuclear power plant. From a technical point of view, the horizontal shell and tube lubricating oil cooler can also realize the function of cooling the lubricating oil, and compared with the plate lubricating oil cooler, the shell and tube lubricating oil cooler is cheap; the structure is mature and reliable, and it is also widely used; and it has high pressure resistance and temperature resistance; it is not easy to get blocked inside, reducing the cost loss of maintenance. The horizontal shell and tube lubricating oil cooler is cheap; the structure is mature and reliable, and it is also widely used; and it has high pressure resistance and temperature resistance; it is not easy to get blocked inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a horizontal shell and tube lubricating oil cooler for a large nuclear power plant according to the utility model;

[0016] Figure 2 yes Figure 1 A-direction view.

[0017] In the figure: 1-water chamber; 2-tube sheet; 3-shell; 4-oil pipeline; 5-tube bundle; 6-support; 7-water chamber inlet; 8-water chamber outlet; 9-oil pipeline inlet; 10-oil pipeline outlet. DETAILED DESCRIPTION

[0018] Combination Figure 1-2 The following implementations are described:

[0019] Specific implementation method 1: A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, comprising n coolers and n-1 six-way valves, wherein the n coolers are stacked one by one from top to bottom, and the oil circuits of the n coolers are connected to the outside through the six-way valves, wherein n≥2, and n is an integer;

[0020] Each cooler includes a water chamber 1, a tube sheet 2, a shell 3, an oil pipeline 4, a tube bundle 5 and a support 6;

[0021] The water chamber 1, the tube sheet 2 and the shell 3 are connected and fixed in sequence, the tube bundle 5 is arranged in the shell 3, and the tube bundle 5 is inserted on the tube sheet 2. The side of the water chamber 1 is provided with a water chamber inlet 7 and a water chamber outlet 8 from top to bottom, and the side of the shell 3 is provided with two oil pipelines 4. The oil pipelines 4 of the two coolers are connected to the six-way valve, and the six-way valve is provided with an oil pipeline inlet 9 and an oil pipeline outlet 10. Two supports 6 are installed at the bottom of the shell of the top cooler, and two supports 6 are installed on the top and bottom of the shell of other coolers respectively. When n coolers are stacked, the bottom support 6 of the upper cooler and the top support 6 of the lower cooler are arranged relatively.

[0022] In this embodiment: the six-way valve makes the upper and lower shell and tube type lubricating oil coolers serve as backup for each other, the upper and lower shell and tube type lubricating oil coolers are connected by the support 6, and the above structures are fixedly connected as a whole.

[0023] The cooler has a horizontal structure, and multiple coolers are stacked together from top to bottom. The medium inside the tube bundle is cooling water, and the medium outside the tube bundle is lubricating oil. The two exchange heat to realize the function of cooling the lubricating oil. Low-temperature cooling water enters the water chamber through the water chamber inlet. After passing through the tube bundle, the low-temperature cooling water becomes high-temperature cooling water and is discharged from the water chamber outlet. High-temperature lubricating oil enters the oil pipeline inlet of the six-way valve, and the lubricating oil after cooling flows out of the oil pipeline outlet of the six-way valve. The lubricating oil flows in the shell and exchanges heat with the cooling water flowing in the tube bundle. The medium at the oil pipeline inlet is high-temperature lubricating oil, and the medium at the oil pipeline outlet is low-temperature lubricating oil. The medium at the water chamber outlet is low-temperature cooling water, and the medium at the water chamber outlet is high-temperature cooling water.

[0024] Specific implementation method 2: A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, wherein the water chamber inlet 7 is arranged horizontally and located above the center line of the water chamber 1; the water chamber outlet 8 is arranged horizontally and located below the center line of the water chamber 1.

[0025] In this embodiment: the water chamber inlet is arranged horizontally and located above the center line of the water chamber; the water chamber outlet is arranged horizontally and located below the center line of the water chamber; the water chamber outlet medium is low-temperature cooling water, and the water chamber outlet medium is high-temperature cooling water.

[0026] Other implementations are the same as the first specific implementation.

[0027] Specific implementation method three: A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, wherein two oil pipelines 4 are connected to the upper end of the side of the shell 3.

[0028] In this embodiment, both oil pipelines are connected to the upper end of the side portion of the housing.

[0029] Other implementations are the same as the first specific implementation.

[0030] Specific implementation method 4: A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, the oil pipeline inlet is located at the six-way valve close to the water chamber side, and the oil pipeline outlet is located at the six-way valve away from the water chamber side.

[0031] In this embodiment: the oil pipeline inlet is located at the six-way valve close to the water chamber side, the oil pipeline outlet is located at the six-way valve away from the water chamber side, the oil pipeline inlet medium is high-temperature lubricating oil, and the oil pipeline outlet medium is low-temperature lubricating oil.

[0032] Other implementations are the same as the first specific implementation.

[0033] Specific implementation method 5: A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, the oil pipeline 4 connected to the oil pipeline inlet 9 is connected to a position on the shell 3 close to the tube sheet 2, and the oil pipeline 4 connected to the oil pipeline outlet 10 is connected to a position on the shell 3 away from the tube sheet 2.

[0034] In this embodiment: the oil pipeline connected to the oil pipeline inlet is connected to a position on the shell close to the tube sheet, and the oil pipeline connected to the oil pipeline outlet is connected to a position on the shell far from the tube sheet. When the high-temperature lubricating oil enters the oil pipeline inlet, it is close to the entering low-temperature cooling water, which has a better heat exchange effect.

[0035] Other implementations are the same as the fourth specific implementation.

[0036] Working principle:

[0037] The oil pipeline inlet is located at the six-way valve in the middle of the two shells, close to the water chamber side, and the oil pipeline outlet is located at the six-way valve in the middle of the two shells, away from the water chamber side. The medium of the oil pipeline inlet is high-temperature lubricating oil, and the medium of the oil pipeline outlet is low-temperature lubricating oil. The water chamber inlet is arranged horizontally and located above the center line; the water chamber outlet is arranged horizontally and located below the center line; the medium of the water chamber outlet is low-temperature cooling water, and the medium of the water chamber outlet is high-temperature cooling water. The tube bundle is inserted on the tube sheet, and the entire tube bundle is arranged inside the shell. The medium inside the tube bundle is cooling water, and the medium outside the tube bundle is lubricating oil. The two exchange heat to realize the function of cooling the lubricating oil. There is a six-way valve in the middle of the two shells, so that the upper and lower shell and tube lubricating oil coolers are spare for each other. The upper and lower shell and tube lubricating oil coolers are connected by a support. The above structures are fixed as a whole, and the support is arranged horizontally for support.

[0038] The cooler is set horizontally, and there are more horizontal sections of the oil circuit, which flows slowly and is not prone to blockage. It can flow continuously to achieve the inflow and outflow of lubricating oil.

Claims

1. A horizontal shell and tube lubricating oil cooler for a large nuclear power plant, characterized in that: It includes n coolers and n-1 six-way valves, the n coolers are stacked from top to bottom, the oil circuits of the n coolers are connected to the outside through the six-way valves, n≥2, n is an integer; Each cooler comprises a water chamber (1), a tube sheet (2), a shell (3), an oil pipeline (4), a tube bundle (5) and a support (6); The water chamber (1), the tube sheet (2) and the shell (3) are connected and fixed in sequence, the tube bundle (5) is arranged in the shell (3), and the tube bundle (5) is inserted on the tube sheet (2). The side of the water chamber (1) is provided with a water chamber inlet (7) and a water chamber outlet (8) in sequence from top to bottom, and the side of the shell (3) is provided with two oil pipelines (4). The oil pipelines (4) of the two coolers are both connected to a six-way valve, and the six-way valve is provided with an oil pipeline inlet (9) and an oil pipeline outlet (10). The bottom of the shell of the top cooler is provided with two supports (6), and the top and bottom of the shells of other coolers are respectively provided with two supports (6). When n coolers are stacked, the bottom support (6) of the upper cooler and the top support (6) of the lower cooler are arranged relative to each other.

2. A horizontal shell and tube lubricating oil cooler for a large nuclear power plant according to claim 1, characterized in that: The water chamber inlet (7) is arranged horizontally and is located above the center line of the water chamber (1); the water chamber outlet (8) is arranged horizontally and is located below the center line of the water chamber (1).

3. The horizontal shell and tube lubricating oil cooler for a large nuclear power plant according to claim 1, characterized in that: The two oil pipelines (4) are both connected to the upper ends of the side portions of the housing (3).

4. The horizontal shell and tube lubricating oil cooler for a large nuclear power plant according to claim 1, characterized in that: The oil pipeline inlet (9) is located at the six-way valve, close to the water chamber side, and the oil pipeline outlet (10) is located at the six-way valve, away from the water chamber side.

5. A horizontal shell and tube lubricating oil cooler for a large nuclear power plant according to claim 4, characterized in that: The oil pipeline (4) connected to the oil pipeline inlet (9) is connected to a position on the shell (3) close to the tube sheet (2), and the oil pipeline (4) connected to the oil pipeline outlet (10) is connected to a position on the shell (3) away from the tube sheet (2).

Images