Explosion-proof diesel engine tail gas cooler

Abstract

The utility model discloses an explosion-proof diesel engine tail gas cooler in the field of coolers. The explosion-proof diesel engine tail gas cooler comprises a main body and a breather pipe arranged in the main body, the breather pipe is spirally arranged in the main body, cooling liquid is contained in the main body, and an air inlet and an air outlet which are aligned with the two ends of the breather pipe are formed in the outer surface of the main body respectively; the expansion water tank is arranged on the main body, and the expansion water tank is used for filling cooling liquid into the main body and collecting the expanded cooling liquid in the main body; a plurality of heat exchange bags are arranged on the breather pipe, and a plurality of thin pipes which are arranged in parallel are arranged in the heat exchange bags. The contact area between gas in the breather pipe and cooling liquid in the main body is increased through the spirally-arranged breather pipe and the heat exchange bag on the breather pipe, the gas cooling speed is increased, the breather pipe is spirally arranged, the length of the breather pipe can be increased, the breather pipe is arranged in the main body more compactly, and the rapid cooling effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of cooler, especially relates to a tail gas cooler of explosion -proof diesel engine. BACKGROUND

[0002] At present, explosion -proof diesel engine is used in explosive gas environment, needs to have explosion -proof requirement, according to the industry and national standard requirement, the tail gas temperature requirement of explosion -proof diesel engine cannot be higher than 70 DEG C, and the tail gas of diesel engine after doing work combustion is at four five hundred Celsius degrees, and the heat contained in the tail gas of diesel engine with greater displacement power is higher and the gas flow rate is also faster, and the difficulty of heat exchange cooling required is also greater. The current cooling mode of the tail gas of explosion -proof diesel engine has two kinds, one is water immersion type cooling, and the tail gas is cooled after being immersed in the exhaust gas treatment box, and exhaust gas can take away more water vapor, so it is necessary to constantly supplement cooling water, and the capacity of the water supplement tank carried on the vehicle is limited, and the full water running time of high -power diesel engine is about 1 hour, which brings great water supplement work burden to the driver. To solve the first kind of mode, some people have adopted the non -water immersion type shell type cooling, that is, the exhaust gas flows in the shell, and the fluid heat exchange is carried out outside the shell, and there is certain effect in theory, but if there is no large effective area of heat exchange, the tail gas is difficult to reduce the temperature to the required temperature, so in actual application, the second kind of mode is rarely used, and only has certain effect in the diesel engine with low power and small displacement, so, an urgent need exists for a cooler with high cooling efficiency. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a kind of tail gas coolers of explosion -proof diesel engine, through spiral air pipe and its heat exchange capsule on it, improve the passing time of gas in main body and improve the contact area of gas and external cooling liquid, to improve cooling efficiency.

[0004] To solve the above technical problems, the following technical solutions are adopted:

[0005] The utility model provides a kind of tail gas cooler of explosion -proof diesel engine, including main body and the air pipe being arranged in main body;The air pipe is spirally arranged in the main body, the main body is equipped with cooling liquid, and the main body outer surface is equipped with air inlet and exhaust port respectively with the air pipe two ends alignment arrangement;

[0006] It further includes expansion water tank, is arranged on main body, and the expansion water tank is used to fill cooling liquid in main body and collect after cooling liquid expansion in main body;

[0007] The air pipe is equipped with several heat exchange capsules, and the heat exchange capsule is equipped with several parallelly arranged thin tubes inside.

[0008] Optionally, the ventilation pipe comprises a straight pipe part, a spiral part, a sound attenuation part and a tail part, the end of the straight pipe part extends to outside of the main body and is connected with the outer surface of the main body through a connecting flange to form the air inlet, the spiral part is provided with a plurality of heat exchange capsules, the sound attenuation part is located at the tail end of the spiral part and is provided with a sound attenuator, the tail part is a horn structure, the large-diameter end of the tail part is connected with the outer surface of the main body to form an air outlet, and a flame arrester is mounted on the air outlet.

[0009] Optionally, the heat exchange capsule is in a whole shuttle shape, the two ends of the thin pipe are arranged on two horn joints respectively, the horn joint comprises a fixed plate and a horn pipe, a plurality of round holes are arranged on the fixed plate, the end of the thin pipe is matched with the round hole, and the fixed plate is mounted on the large-end of the horn pipe.

[0010] Optionally, the main body comprises a box body and a cover plate, the opening edge of the box body is outwardly extended to be provided with a connecting surface, and the cover plate is matched with the connecting surface to seal the box body.

[0011] Optionally, the air inlet is connected with the exhaust pipe of the diesel engine through an explosion-proof exhaust pipe, the air outlet is connected with the flame arrester, and a flame arrester mounting seat is further arranged between the air outlet and the flame arrester and mounted on the main body.

[0012] Optionally, the flame arrester is provided with a flame arrester exhaust pipe, and the gas enters the flame arrester from the air outlet and is discharged from the flame arrester exhaust pipe.

[0013] Optionally, the expansion water tank is connected with the water adding opening on the main body through a connecting pipe.

[0014] Optionally, the side edge of the main body is further provided with a water outlet and a water inlet, the water outlet and the water inlet are located at two opposite corners of the side edge of the main body, and the water outlet and the water inlet are connected with an external heat dissipation system through a water pipe and a water pump, so that the external heat dissipation system is used for external cooling and heat dissipation of the cooling liquid.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] 1、 the utility model discloses a ventilation pipe and heat exchange capsule arranged spirally to improve the contact area between the gas in the ventilation pipe and the cooling liquid in the main body, improve the cooling speed of the gas, and arrange the ventilation pipe spirally to increase the length of the ventilation pipe and arrange it more compactly in the main body, so that the gas in the ventilation pipe passes through the thin pipe on the heat exchange capsule to improve the contact area between the gas and the cooling liquid and achieve the effect of rapid cooling.

[0017] 2. The tail end of the breather pipe is also provided with a silencer, the silencer can eliminate the noise between the tail gas and the breather pipe, the tail end of the breather pipe is a horn-shaped structure, the back pressure of the tail gas can be reduced, and it is easier to enter the flame arrester. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic diagram of the explosion-proof diesel engine tail gas cooler in the embodiment of the utility model;

[0019] Figure 2 is the split structure schematic diagram of the explosion-proof diesel engine tail gas cooler in the embodiment of the utility model;

[0020] Figure 3 is the installation structure schematic diagram of the explosion-proof diesel engine tail gas cooler in the embodiment of the utility model;

[0021] Figure 4 is the half cut structure schematic diagram of the explosion-proof diesel engine tail gas cooler in the embodiment of the utility model;

[0022] Figure 5 is one of the breather pipe and cover plate structure schematic diagram in the embodiment of the utility model;

[0023] Figure 6 is the second breather pipe and cover plate structure schematic diagram in the embodiment of the utility model;

[0024] Figure 7 is the box body structure schematic diagram in the embodiment of the utility model;

[0025] Figure 8 is the heat exchange capsule structure schematic diagram in the embodiment of the utility model;

[0026] Figure 9 is the cross section structure schematic diagram of the heat exchange capsule in the embodiment of the utility model.

[0027] EXPLANATION OF REFERENCE NUMERALS:

[0028] 1, main body; 11, box body; 12, cover plate; 13, connecting surface; 14, water adding port; 15, water inlet; 16, water outlet; 2, breather pipe; 21, heat exchange capsule; 211, thin pipe; 212, fixed plate; 213, horn pipe; 22, straight pipe part; 23, spiral part; 24, silencer part; 25, tail part; 26, air inlet; 27, connecting flange; 3, flame arrester; 31, flame arrester mounting seat; 32, flame arrester exhaust pipe; 4, expansion water tank; 41, connecting pipe; 5, diesel engine; 51, explosion-proof exhaust pipe; 6, water pump; 7, radiator; 8, water pipe. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0031] This embodiment provides an explosion-proof diesel engine exhaust gas cooler, including a main body 1 and a vent pipe 2 disposed within the main body 1; the vent pipe 2 is spirally arranged within the main body 1, the main body 1 is filled with coolant, and the main body 1 is respectively provided with an air inlet and an exhaust outlet aligned with the two ends of the vent pipe 2.

[0032] It also includes an expansion tank 4, which is installed on the main body 1. The expansion tank 4 is used to add coolant into the main body 1 and to collect the coolant after it expands in the main body 1.

[0033] The ventilation pipe 2 is provided with several heat exchange bladders 21, and the heat exchange bladders 21 are provided with several parallel thin tubes 211 inside.

[0034] like Figure 1 , Figure 2 ,Figure 3 The air inlet is connected to the exhaust pipe of the diesel engine 5. After the exhaust gas enters the air inlet, it flows in the air pipe 2 and exchanges heat with the cooling liquid outside the air pipe 2 to reduce the temperature of the exhaust gas, and then enters the flame arrester 3 from the exhaust port for further treatment and then discharged. The air pipe 2 is directly immersed in the cooling liquid in the main body 1. When the temperature of the cooling liquid in the main body 1 rises, the cooling liquid expands and enters the expansion tank 4, which can prevent the main body 1 and the internal air pipe 2 from being damaged when the cooling liquid in the main body 1 expands.

[0035] The main body 1 is also connected to a heat dissipation system. The cooling liquid in the main body 1 is cooled by the heat dissipation system and then discharged into the main body 1 to realize cyclic cooling. The loss of the cooling liquid is added to the main body 1 by the expansion tank 4 to ensure that the cooling liquid completely immerses the internal air pipe 2. Example Two

[0036] This embodiment is based on example one and provides an explosion-proof diesel engine exhaust cooler. The difference is that:

[0037] As shown in Figure 1 , Figure 7 The main body 1 includes a box body 11 and a cover plate 12. The edge of the opening of the box body 11 extends outward to form a connecting surface 13. The cover plate 12 is in contact with the connecting surface 13 to seal the opening of the box body 11. The side wall of the box body 11 is provided with a water inlet 15 and a water outlet 16. The water inlet 15 and the water outlet 16 are arranged at two pairs of top corners of the side wall. The water inlet 15 is close to one end of the cover plate 12, and the water outlet 16 is arranged close to one end of the bottom. The water inlet 15 and the water outlet 16 are connected with the radiator 7 through the water pipe 8 and the water pump 6. The water pump 6 transports the cooling liquid in the box body 11 to the radiator 7 for heat dissipation. After the heat dissipation is completed, the cooling liquid flows into the box body 11 for heat exchange, realizing the cyclic use of the cooling liquid. When the cooling liquid is used cyclically, the expansion tank 4 is used to heat the cooling liquid to avoid the cooling liquid in the box body 11 from completely immersing the air pipe 2.

[0038] As shown in Figure 4 , Figure 5 , Figure 6As shown, the ventilation pipe 2 includes a straight pipe section 22, a spiral section 23, a muffler section 24 and a tail section 25, the spiral section 23 is provided with a plurality of heat exchange capsules 21, one end of the straight pipe section 22 penetrates from the bottom of the cover plate 12 to the upper surface and is installed on the upper surface of the cover plate 12 through a connecting flange 26 to form an air inlet, the air inlet is connected with the tail gas pipe of the diesel engine 5 through an explosion-proof exhaust pipe 51. The muffler section 24 is located at the tail end of the spiral section 23, and the muffler section 24 is provided with a muffler, after the tail gas enters the ventilation pipe 2 from the air inlet, passes through the heat exchange capsules 21 on the spiral section 23, passes through the muffler again, and then enters the flame arrester 3 through the tail section 25. The muffler can eliminate the sound emitted by the gas due to the action of the ventilation pipe 2. The tail section 25 is a horn-shaped structure, the large opening in the horn-shaped structure of the tail section 25 is connected with the cover plate 12 to form an exhaust port, a through hole is formed in the cover plate 12 and communicates with the large opening, a flame arrester mounting seat 31 is mounted on the through hole, the flame arrester 3 is mounted on the flame arrester mounting seat 31, the exhaust port communicates with the flame arrester 3, the gas enters the flame arrester 3 for treatment from the exhaust port, the flame arrester 3 is provided with a flame arrester exhaust pipe 32, and the gas treated by the flame arrester 3 is discharged from the flame arrester exhaust pipe 32. The horn-shaped tail section 25 can reduce the back pressure of the gas and can more smoothly enter the flame arrester 3.

[0039] As shown in Figure 8 , Figure 9 , the heat exchange capsule 21 is in the shape of a shuttle as a whole, and the two ends of the plurality of thin tubes 211 are connected with connecting heads, the connecting heads are connected with the ventilation pipe 2, the connecting head includes a horn pipe 213 and a fixing plate 212, the fixing plate 212 is provided with a plurality of round holes matched with the thin tubes 211, the two ends of the thin tubes 211 are respectively installed on the round holes on the fixing plate 212, the fixing plate 212 is installed at the large opening of the horn pipe 213, the small opening of the horn pipe 213 is connected with the ventilation pipe 2, and the gas passes through each heat exchange capsule 21 on the ventilation pipe 2, so that the airflow is divided into the plurality of thin tubes 211 to increase the contact area between the airflow and the external cooling liquid. The horn pipe 213 can guide the gas to diffuse into the thin tubes 211. The number of heat exchange capsules 21 can be increased according to the demand and the space of the device, so as to be used for explosion-proof oil pumping machines of different power sections and displacements.

[0040] As shown in Figure 2 , Figure 4 , Figure 5 , the cover plate 12 is also provided with an expansion water tank 4, the expansion water tank 4 is connected with the water inlet 14 on the cover plate 12 through a connecting pipe 41, the water inlet 14 on the cover plate 12 communicates with the inside of the tank body 11, the top of the expansion water tank 4 is provided with a cooling liquid inlet, the cooling liquid enters the expansion water tank 4 through the cooling liquid inlet and then enters the inside of the tank body 11. When heat exchange is carried out in the tank body 11, the cooling liquid expands due to the increase of temperature, and the cooling liquid in the tank body 11 is temporarily stored in the expansion water tank 4.

[0041] When in use, the exhaust gas generated by the diesel engine 5 enters the air pipe 2 through the connecting pipe 41, and starts to exchange heat with the cooling liquid outside the air pipe 2, so as to reduce the temperature of the exhaust gas. The exhaust gas successively passes through the straight pipe part 22, the spiral part 23 and the heat exchange bag 21 thereon, the silencing part 24 and the tail part 25 on the air pipe 2, and enters the flame arrester 3 from the exhaust port of the tail part 25, and finally is discharged from the flame arrester exhaust pipe 32 on the flame arrester 3. Since the spiral part 23 on the air pipe 2 is spirally distributed, the passing path of the exhaust gas is long, so that the passing time is long, and the exhaust gas stays in the box body 11 for a long time, and exchanges heat with the cooling liquid in the box body 11 for a long time. In the heat exchange bag 21 on the spiral part 23, the airflow is dispersed into a plurality of thin pipes 211, each thin pipe 211 exchanges heat with the external cooling liquid, the contact area during heat exchange is increased, and the heat exchange efficiency is improved.

[0042] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An explosion-proof diesel engine exhaust cooler characterized by, The application relates to a cooling device for diesel engine, which comprises a main body and a ventilation pipe arranged in the main body; the ventilation pipe is spirally arranged in the main body, the main body is filled with cooling liquid, and air inlets and air outlets are respectively arranged on the outer surface of the main body and aligned with the two ends of the ventilation pipe. The application further comprises an expansion water tank arranged on the main body, which is used for adding cooling liquid into the main body and collecting the expanded cooling liquid in the main body. The ventilation pipe is provided with a plurality of heat exchange capsules, and the heat exchange capsules are internally provided with a plurality of parallel arranged thin pipes.

2. The diesel exhaust cooler of claim 1, wherein, The ventilation pipe comprises a straight pipe part, a spiral part, a sound attenuation part and a tail part; the end of the straight pipe part extends to the outside of the main body and is connected with the outer surface of the main body through a connecting flange to form the air inlet; the spiral part is provided with a plurality of heat exchange capsules; the sound attenuation part is located at the tail end of the spiral part and is provided with a sound attenuator; the tail part is a horn structure; the large-diameter end of the tail part is connected with the outer surface of the main body to form the air outlet; and a flame arrester is arranged on the air outlet.

3. The diesel exhaust cooler of claim 1, wherein, The heat exchange capsule is in a whole shuttle shape, the two ends of the thin pipe are arranged on two horn joints respectively, the horn joint comprises a fixed plate and a horn pipe, a plurality of round holes are arranged on the fixed plate, the end of the thin pipe is matched with the round hole, and the fixed plate is arranged on the large-diameter end of the horn pipe.

4. The diesel exhaust cooler of claim 1, wherein, The main body comprises a box body and a cover plate, the opening edge of the box body is outwardly extended and provided with a connecting surface, and the cover plate is matched with the connecting surface to seal the box body.

5. The diesel exhaust cooler of claim 1, wherein, The air inlet is connected with the exhaust pipe of the diesel engine through an explosion-proof exhaust pipe, the air outlet is connected with the flame arrester, and a flame arrester mounting seat is further arranged between the air outlet and the flame arrester and mounted on the main body.

6. The diesel exhaust cooler of claim 5, wherein, A flame arrester exhaust pipe is arranged on the flame arrester, and gas enters the flame arrester from the air outlet and is discharged from the flame arrester exhaust pipe.

7. The diesel exhaust cooler of claim 1, wherein, The expansion water tank is connected with the water inlet of the main body through a connecting pipe.

8. The diesel exhaust cooler of claim 1, wherein, Water outlets and water inlets are further arranged on the side edges of the main body, the water outlets and the water inlets are arranged at two opposite corners of the side edges of the main body, the water outlets and the water inlets are connected with an external heat dissipation system through water pipes and water pumps, and the heat dissipation system is used for externally cooling and heat dissipating the cooling liquid.

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