Air cooler for low-speed diesel engine of ship

Abstract

The air cooler comprises a cooler shell, an air inlet pipe, an air outlet pipe, a diesel engine body, a collecting opening and a collecting box, the right side of the cooler shell is connected with the air inlet pipe, the left side of the cooler shell is connected with the air outlet pipe, and the tail end of the air inlet pipe and the tail end of the air outlet pipe are connected with the diesel engine body respectively. A heat exchange pipe is arranged in the telescopic cooler shell, a scraping ring is arranged on the heat exchange pipe, and a first telescopic rod is connected to the scraping ring. The baffle plates are arranged in the cooler shell, the heat exchange pipes are arranged to be of the s-shaped structures, so that the flowing time of air in the cooler is prolonged, meanwhile, the s-shaped heat exchange pipes make contact with the air all the time in the air flowing process, the contact time is prolonged, and therefore the heat exchange efficiency is improved. And four groups of parallel cooling pipes are arranged on the baffle plate of the cooler shell, so that the contact area between air and the heat exchange pipes is enlarged, and the cooling efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-speed ship diesel engines, in particular to an air cooler for a low-speed ship diesel engine. Background Art

[0002] The low-speed diesel engine air cooler is an energy-saving device that realizes heat transfer between materials between two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the needs of process conditions. It is also one of the main equipment for improving energy utilization. The low-speed diesel engine air cooler is an important component used to lead part of the gas from the cylinder through the separation device after the internal air is burned, and then transported into the air cooler for cooling and then sent back to the cylinder for circulation, which can greatly improve the efficiency of energy utilization.

[0003] Some existing small-scale ship low-speed diesel engine air coolers use external fin heat exchangers, where air goes through the fin side, i.e. the shell side, and low-temperature water goes through the inside of the heat exchange tube, i.e. the tube side. The low-temperature water in the tube exchanges heat with the high-temperature air outside the tube through the tube wall and the fins. This structure is relatively simple, and the contact time between the gas and the heat exchange tube is short and the contact area is small. Most of the gas will directly enter the top air inlet after flowing into the air cooler, affecting the circulation. Therefore, we propose a ship low-speed diesel engine air cooler to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a ship low-speed diesel engine air cooler to solve the problem of short contact time and small contact area between gas and heat exchange tubes in small ship low-speed diesel engine air coolers currently on the market as mentioned in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ship low-speed diesel engine air cooler, comprising a cooler shell, an air inlet pipe, an air outlet pipe, a diesel engine body, a collecting port and a collecting box, the right side of the cooler shell is connected to the air inlet pipe, the left side of the cooler shell is connected to the air outlet pipe, and the ends of the air inlet pipe and the air outlet pipe are respectively connected to the diesel engine body, a heat exchange pipe is arranged in the telescopic cooler shell, and a scraper ring is arranged on the heat exchange pipe, and a first telescopic rod is connected to the scraper ring, and the rear side of the telescopic first telescopic rod is connected to the first telescopic rod, A baffle is connected to the telescopic cooler shell, and a first slide groove is provided in the baffle, and a first pull rod is provided in the first slide groove, and a first telescopic rod is connected to the front end of the first pull rod, connecting plates are provided on the left and right ends of the outer side of the cooler shell, and a first slot is provided on the connecting plate, and second slide grooves are provided on both sides inside the connecting plate, a second pull rod is provided in the second slide groove, and a fixed block is connected to the second pull rod, and a card block is provided under the fixed block, a collecting port is provided at the bottom of the cooler shell, and a collecting box is connected to the bottom of the collecting port.

[0006] Preferably, the first telescopic rod forms a slide movable structure in the baffle through the first slide groove and the first pull rod, and a tooth block is provided on the surface of the first pull rod, and the length of the first telescopic rod is half the length of the heat exchange tube.

[0007] Preferably, the connecting plate forms a sliding groove movable structure through the first clamping groove and the second pull rod in the baffle plate.

[0008] Preferably, the heat exchange tubes are distributed in an "S" shape along the trajectory of the baffle in the cooler shell.

[0009] Preferably, the second pull rod forms a movable structure in the connecting plate through the second sliding groove, and the distance between two sides of the second pull rod is greater than the width of the baffle.

[0010] Preferably, the second pull rod forms a buckle structure through a fixed block and a clamping block on the second pull rod and a tooth block on the first pull rod.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the air cooler for the low-speed diesel engine of a ship;

[0012] (1) By arranging baffles inside the cooler shell and arranging the heat exchange tubes into an "S"-shaped structure, the flow time of air inside the cooler is prolonged. At the same time, the "S"-shaped heat exchange tubes are always in contact with the air during the air flow process, thereby prolonging the contact time. In addition, four groups of cooling tubes are arranged in parallel on the baffles of the cooler shell, thereby increasing the contact area between the air and the heat exchange tubes, greatly improving the cooling efficiency.

[0013] (2) The first telescopic rod forms a slide movable structure in the baffle through the first slide groove and the first pull rod, so that the first telescopic rod is driven to move by pulling the first pull rod, so that the scraper ring on the first telescopic rod can clean the surface of the heat exchange tube, avoiding the adhesion of substances in the air to the heat exchange tube to form impurity agglomerates after long-term use, thereby affecting the subsequent heat exchange efficiency. The second pull rod forms a buckle structure with the tooth block on the first pull rod through the clamping block, so that the first pull rod can be extended and retracted in the same way through the connecting plate, and can also be opened through the buckle structure to perform a separate pulling and pulling movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a side view of the structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the side section structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the top-sectional structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the side section structure of the first pull rod of the utility model;

[0018] Figure 5 It is a schematic diagram of the front section structure of the connecting plate of the utility model.

[0019] In the figure: 1. cooler housing; 2. air inlet pipe; 3. air outlet pipe; 4. baffle; 5. first slot; 6. first slide; 7. first pull rod; 8. first telescopic rod; 9. scraper ring; 10. heat exchange tube; 11. diesel engine body; 12. fixing block; 13. connecting plate; 14. second slide; 15. second pull rod; 16. block; 17. collection port; 18. collection box. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5The utility model provides a technical solution: a ship low-speed diesel engine air cooler, including a cooler shell 1, an air inlet pipe 2, an air outlet pipe 3, a baffle 4, a first card slot 5, a first slide slot 6, a first pull rod 7, a first telescopic rod 8, a scraper ring 9, a heat exchange pipe 10, a diesel engine body 11, a fixing block 12, a connecting plate 13, a second slide slot 14, a second pull rod 15, a card block 16, a collecting port 17 and a collecting box 18, the right side of the cooler shell 1 is connected to the air inlet pipe 2, and the left side of the cooler shell 1 is connected to the air outlet pipe 3, and the ends of the air inlet pipe 2 and the air outlet pipe 3 are respectively connected to the diesel engine body 11, a heat exchange pipe 10 is arranged in the telescopic cooler shell 1, and a scraper ring 9 is arranged on the heat exchange pipe 10, and the scraper ring 9 A first telescopic rod 8 is connected, and a first telescopic rod 8 is connected to the rear side of the telescopic first telescopic rod 8. A baffle 4 is connected inside the telescopic cooler shell 1, and a first slide groove 6 is provided in the baffle 4, and a first pull rod 7 is provided in the first slide groove 6, and the first pull rod 7 is connected to the first telescopic rod 8 at the front end of the first pull rod 7. Connecting plates 13 are provided at the left and right ends of the outer side of the cooler shell 1, and a first card slot 5 is provided on the connecting plate 13, and second slide grooves 14 are provided on both sides of the inside of the connecting plate 13, a second pull rod 15 is provided in the second slide groove 14, and a fixed block 12 is connected to the second pull rod 15, and a card block 16 is provided under the fixed block 12, a collecting port 17 is provided at the bottom of the cooler shell 1, and a collecting box 18 is connected to the bottom of the collecting port 17.

[0022] The first telescopic rod 8 forms a movable slide structure in the baffle 4 through the first slide 6 and the first pull rod 7, so that the first telescopic rod 8 can move in the baffle 4 by pulling the first pull rod 7, thereby changing the length of the guide structure composed of the internal first telescopic rod 8 and the baffle 4, thereby changing the temperature of the air entering the cylinder, and a tooth block is provided on the surface of the first pull rod 7, which is convenient for the rear side to form a snap structure with the second pull rod 15 through the clamping block 16, and the length of the first telescopic rod 8 is half the length of the heat exchange tube 10, thereby avoiding the scraper rings 9 on the upper and lower corresponding first telescopic rods 8 from colliding with each other when moving on the heat exchange tube 10.

[0023] The connecting plate 13 forms a movable slide structure through the first slot 5 and the second pull rod 15 in the baffle 4, so that the buckle structure composed of the fixed block 12, the second pull rod 15 and the clamping block 16 on the upper side of the connecting plate 13 can be pulled and pulled through the first slot 5 and the first slide 6 in the baffle 4 when released, thereby facilitating the change of the length of the guide structure composed of the internal first telescopic rod 8 and the baffle 4 according to needs, so as to adjust the length of the guide, thereby controlling the temperature of the exhaust gas during reflux.

[0024] The heat exchange tubes 10 are distributed in an “S” shape along the trajectory of the baffles 4 in the cooler shell 1 , thereby cooperating with the baffles 4 to increase the contact time between the air and the heat exchange tubes 10 .

[0025] The second pull rod 15 forms a movable slide groove structure in the connecting plate 13 through the second slide groove 14, so that it can move up and down through the slide groove structure, so that the block 16 on the second pull rod 15 and the tooth block on the first pull rod 7 can be engaged and released, and the distance between the two sides of the second pull rod 15 is greater than the width of the baffle 4, so as to avoid blocking the movement of the first pull rod 7 in the baffle 4 in the connecting plate 13.

[0026] The second pull rod 15 forms a buckle structure with the fixed block 12 and the clamping block 16 on the second pull rod 15 and the tooth block on the first pull rod 7 , so as to facilitate locking and releasing the movement of the first pull rod 7 through the movement of the second pull rod 15 .

[0027] The collecting port 17 and the collecting box 18 are threadedly connected, and the movable connection between the collecting port 17 and the collecting box 18 and the first telescopic rod 8 and the baffle 4 are all provided with an airtight structure.

[0028] Working principle: When using the ship low-speed diesel engine air cooler, first, the high-temperature gas is burned in the cylinder of the diesel engine body 11 and then flows through the diversion device from the intake pipe 2 into the cooler shell 1. Then the high-temperature gas flows along the guidance of the baffle plate 4 and contacts the heat exchange tube 10 between the baffle plates 4, thereby generating heat exchange with the low-temperature liquid in the heat exchange tube 10, thereby taking away the heat in the gas. Then, the gas that has undergone heat exchange is discharged from the outlet pipe 3 at the other end of the cooler shell 1 and enters the cylinder again for secondary work.

[0029] After the cooler has been working for a long time, the connecting plate 13 is pulled so that the connecting plate 13 moves with the slide groove structure on the inner side of the baffle 4 through the first slot 5 and the fixed block 12, so that multiple first pull rods 7 are pulled at the same time, so that the first telescopic rod 8 connected to the first pull rod 7 slides in the first slide groove 6 inside the baffle 4, thereby driving the scraper ring 9 on the first telescopic rod 8 to move on the surface of the heat exchange tube 10, thereby cleaning the dirt on the surface of the heat exchange tube 10 and improving the heat conduction efficiency. The scraped dirt will fall into the collection box 18 from the collection port 17 at the bottom of the cooler shell 1 due to gravity. Subsequent staff can clean the dirt by removing the collection box 18 through the threaded structure of the collection box 18 and the collection port 17, and the contents not described in detail in this manual belong to the existing technology known to professional and technical personnel in this field.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ship low-speed diesel engine air cooler, comprising a cooler housing (1), an air inlet pipe (2), an air outlet pipe (3), a diesel engine body (11), a collecting port (17) and a collecting box (18), characterized in that: The cooler housing (1) is connected to an air inlet pipe (2) on the right side, and to an air outlet pipe (3) on the left side, and the ends of the air inlet pipe (2) and the air outlet pipe (3) are respectively connected to a diesel engine body (11), a heat exchange pipe (10) is arranged in the telescopic cooler housing (1), and a scraper ring (9) is arranged on the heat exchange pipe (10), and a first telescopic rod (8) is connected to the scraper ring (9), and the rear side of the telescopic first telescopic rod (8) is connected to the first telescopic rod (8), and a baffle (4) is connected in the telescopic cooler housing (1), and a first slide groove (6) is arranged in the baffle plate (4), and a first slide groove (6) is arranged in the first slide groove (6). A first pull rod (7) is provided, and a first telescopic rod (8) is connected to the front end of the first pull rod (7); connecting plates (13) are provided at the left and right ends of the outer side of the cooler shell (1), and a first clamping groove (5) is provided on the connecting plate (13), and second sliding grooves (14) are provided on both sides of the inside of the connecting plate (13); a second pull rod (15) is provided in the second sliding groove (14), and a fixed block (12) is connected to the second pull rod (15), and a clamping block (16) is provided under the fixed block (12); a collecting port (17) is provided at the bottom of the cooler shell (1), and a collecting box (18) is connected to the bottom of the collecting port (17).

2. The air cooler for a low-speed marine diesel engine according to claim 1, characterized in that: The first telescopic rod (8) forms a slide groove movable structure in the baffle (4) through the first slide groove (6) and the first pull rod (7), and a tooth block is provided on the surface of the first pull rod (7), and the length of the first telescopic rod (8) is half the length of the heat exchange tube (10).

3. The air cooler for a low-speed marine diesel engine according to claim 1, characterized in that: The connecting plate (13) forms a sliding groove movable structure through the first clamping groove (5) and the second pull rod (15) in the baffle plate (4).

4. The air cooler for a low-speed marine diesel engine according to claim 1, characterized in that: The heat exchange tubes (10) are distributed in an "S" shape along the trajectory of the baffle plate (4) on the cooler shell (1).

5. The air cooler for a low-speed marine diesel engine according to claim 1, characterized in that: The second pull rod (15) forms a movable structure in the connecting plate (13) through the second sliding groove (14), and the distance between the two sides of the second pull rod (15) is greater than the width of the baffle (4).

6. The air cooler for a low-speed marine diesel engine according to claim 1, characterized in that: The second pull rod (15) forms a buckle structure through a fixed block (12) and a clamping block (16) on the second pull rod (15) and a tooth block on the first pull rod (7).

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