CN210033667U

CN210033667U - Marine dual-fuel engine gas rail

Info

Publication number: CN210033667U
Application number: CN201920778614.0U
Authority: CN
Inventors: 杨尚刚; 辛强之; 王延瑞; 闫丽; 贾宝富; 袁磊; 王超; 张洪祥; 沈晓霞
Original assignee: Zichai Power Co Ltd
Current assignee: Zichai Power Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-07
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses mainly be applied to the engine and admit air technical field, in particular to marine dual fuel engine gas rail, including inner tube and outer tube, outer tube lateral wall both ends set up outer air inlet respectively and go out the gas port, and inner tube lateral wall wherein one end sets up interior air inlet, and interior air inlet suit is in outer gas port, and inner tube top distributes and has interior gas outlet, and interior gas outlet periphery sets up the connector, and the connector is installed on the outer tube, forms the comdenstion water cavity between connector and the interior gas outlet, forms between inner tube and the outer tube and sweeps the gas cavity, the comdenstion water cavity with sweep the gas cavity intercommunication. This gas air rail adopts double-walled pipe structural design, and the inner tube is carried the gas and is advanced the combustion chamber, and outer tube circulation air scavenges, realizes will revealing the gas and sweep gas drainage to the cabin outside through the outer tube, avoids the gas of leaking to gather in the cabin, accords with the requirement in safe type cabin of essence.

Description

Marine dual-fuel engine gas rail

Technical Field

The utility model relates to a marine dual fuel engine gas rail mainly is applied to the engine technical field that admits air.

Background

Increasingly rigorous emission regulations and energy crisis become the focus of attention of the internal combustion engine industry, and countries in the world are constantly developing new energy sources and searching for new alternative fuels, wherein natural gas is used as a gas fuel, has the outstanding advantages of good low emission characteristic, low fuel consumption, abundant resources, reasonable configuration and the like, and is an ideal alternative energy source of petroleum. With the popularization of clean fuel in China, the dual-fuel engine should be operated. The existing engine gas rail usually comprises a gas inlet arranged at the side part and a gas outlet distributed at the top part of each cylinder, in order to ensure the use safety in the using process, whether gas leakage exists or not needs to be detected through a detection device, and once leakage occurs, the gas leakage can be directly leaked into a cabin, so that potential safety hazards are caused to the use of ships.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the gas rail of the marine dual-fuel engine is reasonable in structure, prevents leaked gas from accumulating in a cabin, and improves the safety of gas use.

Marine dual fuel engine gas rail, including inner tube and outer tube, outer tube lateral wall both ends set up outer air inlet respectively and go out the gas port, inner tube lateral wall wherein one end sets up interior air inlet, interior air inlet suit is in outer gas port, the inner tube top distributes has interior gas outlet, interior gas outlet periphery sets up the connector, the connector is installed on the outer tube, forms the comdenstion water cavity between connector and the interior gas outlet, forms between inner tube and the outer tube and sweeps the gas cavity, the comdenstion water cavity with sweep gas cavity intercommunication.

The inner tube set up to the pipe, the inner tube is the gas passageway, the outer tube sets up to square pipe, the outer tube is inert gas or air passageway.

The lower part space between inner tube and the outer tube set up the comdenstion water cowling panel, the comdenstion water cowling panel slope sets up, its incline direction is along the interior gas flow direction downward sloping of outer tube, comdenstion water cowling panel end sets up the comdenstion water and lets out the mouth, the comdenstion water is let out the mouth and is installed in the outer tube bottom. During the use of a double-fuel-engine ship, it was found that condensed water accumulated in the ventilation duct. The natural gas is liquefied and stored at low temperature (-162 ℃) on a ship, the natural gas is gasified through a vaporizer before entering an engine, and the temperature of the gasified fuel gas is not higher than 25 ℃. The temperature of the engine room is higher and reaches 45 ℃, and the air humidity is higher. The air circulating through the outer pipe has high temperature and high humidity, so that condensed water is formed between the inner wall pipe and the outer wall pipe of the air rail. With the operation of the machine, condensed water can be accumulated in the air rail outer pipe, and the arrangement of the rectification and drainage device can drain the condensed water.

The condensed water discharge port is connected with the ball valve.

The condensed water rectifying plate is an arc-shaped plate.

The two ends of the inner pipe and the two ends of the outer pipe are plugged by sealing plates, and a gas temperature and pressure sensor interface is arranged on the sealing plate at one end.

Each inner air outlet and the end face of the connecting port are respectively provided with a gas outlet flange, a condensed water loop is arranged on the gas outlet flange and is set to be a cone, and the end faces of the outer air inlet and the outer air outlet are respectively provided with a connecting flange.

And air rail mounting plates are distributed at the bottom of the outer pipe.

The inner air inlet is connected with a fuel gas supply system.

The gas rail adopts a double-wall pipe design, a gas inlet and a scavenging gas inlet and outlet are arranged on the side surface of the gas rail, and an inner pipe is designed as a circular pipe and circulates gas; the outer tube is square tube design, and the outer tube circulation inert gas or air, square tube design is whole pleasing to the eye, easy to assemble. When the gas leaks in the inner pipe, the gas enters the outer pipe, and the air or the inert gas which circulates through the outer pipe is scavenged and discharged out of the cabin, so that the gas is prevented from directly leaking into the cabin, the safety of the cabin is ensured, and the requirement of the intrinsically safe cabin is met. Meets the requirements of 'natural gas fuel power ship code', and can realize the ventilation capacity of 30 times/hour. Therefore, the design not only ensures the ventilation requirement of the air rail, but also ensures the safety of the electromagnetic valve and meets the requirement of the intrinsically safe cabin.

The directions indicated by the arrows are the gas flow direction and the rectification flow direction of the condensed water respectively. When the condensate water forms and gathers, the condensate water flows to the condensate water drain outlet at the lowest position of the air rail along the inclined rectifying plate, the condensate water drain outlet is connected with the ball valve, the ball valve is periodically opened according to the running condition of the machine, and the condensate water in the air rail is drained out of the engine room.

The utility model has the advantages that:

this gas air rail adopts double-walled pipe structural design, and the inner tube is carried the gas and is advanced the combustion chamber, and outer tube circulation air scavenges, realizes will revealing the gas and sweep gas drainage to the cabin outside through the outer tube, avoids the gas of leaking to gather in the cabin, accords with the requirement in safe type cabin of essence. The gas rail is provided with the condensed water rectifying plate and the condensed water discharging device, so that the accumulation of condensed water in a gas inlet system is avoided, the ventilation capacity of the gas rail is not influenced, the risk that an electromagnetic valve in the gas system is submerged by the condensed water is eliminated, and the reliable operation of a dual-fuel engine is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic longitudinal sectional structure of fig. 1.

Fig. 3 is a schematic view of the lateral cross-sectional structure of fig. 1.

Fig. 4 is a schematic structural view of a portion a in fig. 2.

In the figure: 1. an air rail mounting plate; 2. an outer tube; 3. a condensed water discharge port; 4. a gas temperature pressure sensor interface; 5. an inner tube; 6. a gas outlet flange; 7. a condensed water rectifying plate; 8. an outer air inlet; 9. an outer air outlet; 10. an inner air inlet; 11. a condensate loop; 12. a connecting port; 13. an inner air outlet.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-4, marine dual fuel engine gas rail, including the gas rail, the gas rail is installed in engine inlet box one side to be located the blast pipe below, each jar of the corresponding engine in gas rail top communicates with the gas injection valve respectively, the gas injection valve is connected the gas respectively and is sprayed the branch pipe, the gas sprays the branch pipe all with the intake duct intercommunication of cylinder cap. The gas rail includes inner tube 5 and

outer tube

2, 2 lateral wall both ends of outer tube set up outer air inlet 8 respectively and go out

gas port

9, 5 lateral wall of inner tube wherein one end sets up interior air inlet 10, interior air inlet 10 suit is in

outer gas outlet

9, 5 top distributions of inner tube have interior gas outlet 13, interior gas outlet 13 periphery sets up connector 12, connector 12 is installed on outer tube 2, the cavity that forms between connector 12 and the interior gas outlet 13 and the cavity intercommunication between inner tube 5 and the outer tube 2, interior gas outlet 13 is connected the gas injection valve respectively. The inner tube 5 sets up to the pipe, and inner tube 5 is the gas passageway, and outer tube 2 sets up to square pipe, and outer tube 2 is inert gas or air channel, is the comdenstion water passageway between inner tube 5 and the outer tube 2. The lower part space between inner tube 5 and outer tube 2 sets up comdenstion water cowling panel 7, and comdenstion water cowling panel 7 slope sets up, and its incline direction inclines down along the interior gas flow direction downward sloping of

outer tube

2, and 7 ends of comdenstion water cowling panel set up the comdenstion water and let out mouth 3, let out the mouth and install in the 2 bottoms of outer tube. The condensed water discharge port 3 is connected with a ball valve. The condensed water rectifying plate 7 is arranged as an arc-shaped plate. The two ends of the inner pipe 5 and the two ends of the outer pipe 2 are plugged by sealing plates, and a gas temperature and pressure sensor interface 4 is arranged on the sealing plate at one end. The end faces of each inner air outlet 13 and each connecting port 12 are respectively provided with a gas outlet flange 6, a condensed water loop 11 is arranged on the gas outlet flange 6, the condensed water loop 11 is a cone, and the end faces of the outer air inlet 8 and the outer air outlet 9 are respectively provided with a connecting flange. And the bottom of the outer pipe 2 is distributed with an air rail mounting plate 1. The inner air inlet 10 is connected with a gas supply system.

When the air rail is arranged, the air rail mounting surface needs to be adjusted horizontally to ensure that the gas air rail condensate water discharge port 3 is positioned at the lowest point of the whole gas inlet system, the gas rail gas outlet is connected with an electromagnetic valve box, a condensate water interface is connected with a ball valve, an inner gas inlet 10 is connected with the gas inlet system, and an outer gas inlet 8 is connected with a ventilation pipe; when the valve is used, the condensed water release ball valve is opened periodically according to the use condition, so that the condensed water in the air rail is ensured not to be accumulated. The fuel gas enters the fuel gas injection valve and the fuel gas injection branch pipe from the fuel gas outlet and finally enters the air inlet channel of the cylinder cover.

Claims

1. A marine dual fuel engine gas rail, its characterized in that: including inner tube (5) and outer tube (2), outer tube (2) lateral wall both ends set up outer air inlet (8) and go out gas port (9) respectively, air inlet (10) in inner tube (5) lateral wall wherein one end sets up, interior air inlet (10) suit is in outer gas outlet (9), inner tube (5) top distribution has interior gas outlet (13), interior gas outlet (13) periphery sets up connector (12), connector (12) are installed on outer tube (2), form the condensate water cavity between connector (12) and interior gas outlet (13), form the scavenging cavity body between inner tube (5) and outer tube (2), condensate water cavity body and scavenging cavity body intercommunication.

2. The marine dual fuel engine gas rail of claim 1, wherein: the inner pipe (5) is set to be a round pipe, the inner pipe (5) is a fuel gas channel, the outer pipe (2) is set to be a square pipe, and the outer pipe (2) is an inert gas or air channel.

3. The marine dual fuel engine gas rail of claim 1, wherein: the lower part space between inner tube (5) and outer tube (2) sets up comdenstion water cowling panel (7), and comdenstion water cowling panel (7) slope sets up, and its incline direction is along the interior gas flow direction downward sloping of outer tube (2), and comdenstion water cowling panel (7) end sets up comdenstion water and lets out mouth (3), and comdenstion water is let out mouth (3) and is installed in outer tube (2) bottom.

4. The marine dual fuel engine gas rail of claim 3, wherein: the condensed water discharge port (3) is connected with a ball valve.

5. The marine dual fuel engine gas rail of claim 3, wherein: the condensed water rectifying plate (7) is arranged as an arc-shaped plate.

6. The marine dual fuel engine gas rail of claim 1, wherein: the two ends of the inner pipe (5) and the two ends of the outer pipe (2) are plugged by seal plates, and a gas temperature and pressure sensor interface (4) is arranged on the seal plate at one end.

7. The marine dual fuel engine gas rail of claim 1, wherein: gas outlet flanges (6) are respectively arranged on the end faces of the inner gas outlets (13) and the connecting ports (12), condensed water loops (11) are arranged on the gas outlet flanges (6), the condensed water loops (11) are communicated with a condensed water cavity, and connecting flanges are respectively arranged on the end faces of the outer gas inlets (8) and the outer gas outlets (9).

8. The marine dual fuel engine gas rail of claim 7, wherein: the condensed water loop (11) is set as a cone.

9. The marine dual fuel engine gas rail of claim 1, wherein: the bottom of the outer pipe (2) is distributed with an air rail mounting plate (1).

10. The marine dual fuel engine gas rail of claim 1, wherein: the inner air inlet (10) is connected with a fuel gas supply system.