CN210370882U

CN210370882U - Explosion-proof cast iron exhaust manifold

Info

Publication number: CN210370882U
Application number: CN201921321674.6U
Authority: CN
Inventors: 焦召明; 焦显阳; 韩晓强; 任兴周; 高健
Original assignee: LAIZHOU YATONG HEAVY EQUIPMENT CO Ltd
Current assignee: LAIZHOU YATONG HEAVY EQUIPMENT CO Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-04-21
Anticipated expiration: 2029-08-15

Abstract

The utility model discloses an explosion-proof cast iron exhaust manifold, include the intermediate layer body that comprises outer water jacket chamber and inlayer waste gas chamber, set up on the intermediate layer body six and each cylinder body of engine link to each other, with communicating air inlet in inlayer waste gas chamber, one link to each other with the turbo charger import, with the communicating gas outlet in inlayer waste gas chamber, its characterized in that: the water outlet with an upward opening and communicated with the outer-layer water jacket cavity is formed in the upper end face close to one end of the body, the water inlet with a downward opening and communicated with the outer-layer water jacket cavity is formed in the lower end face close to the other end of the body, the water outlet is the highest position of the outer-layer water jacket cavity, and the water inlet is the bottommost position of the outer-layer water jacket cavity. The utility model discloses the delivery port is the highest point in outer water jacket chamber, and the water inlet is the bottommost point in outer water jacket chamber, and circulating water circulation does not fully have the stagnant water for whole exhaust manifold temperature is even.

Description

Explosion-proof cast iron exhaust manifold

Technical Field

The utility model belongs to the technical field of the engine exhaust, specifically indicate an explosion-proof cast iron exhaust manifold for diesel engine.

Background

The explosion-proof exhaust manifold is used as an exhaust pipe of an explosion-proof diesel engine used for underground coal mine engineering machinery, and is directly connected with an engine to concentrate waste gas from each cylinder of the engine and guide the exhaust gas to be discharged. At present, China coal mines are numerous, and based on the special environment of the underground coal mine, the gas content of an underground roadway is high, so that strict requirements are imposed on the explosion-proof performance of a diesel engine. According to the requirements in the coal industry standard MT990-2006 of the people's republic of China, the surface temperature of the engine is not more than 150 degrees, and strict requirements are also provided on the aspect of explosion-proof joint surfaces. High-temperature waste gas generated by the working of the engine firstly passes through the exhaust manifold, and the explosion-proof performance of the exhaust manifold directly influences the surface temperature of the engine, so that the integral explosion-proof performance of the engine and the safety performance of the underground working of a coal mine are influenced. The exhaust manifold is critical to explosion-proof diesel engines.

The utility model with publication number CN201963382U discloses a double-layer exhaust pipe for explosion-proof diesel engine, which comprises a cast exhaust manifold and an exhaust elbow pipe, wherein the side wall of the cast exhaust manifold and the exhaust elbow pipe is composed of an inner plate and an outer plate with the wall thickness of 6-9 mm, the water inlet of the cast exhaust manifold is positioned at one end of the exhaust manifold, the water outlet of the cast exhaust manifold is positioned at the other end of the exhaust manifold, the cooling water circulating in the interlayer flows from one end to the other end, but because the water inlet of the cast exhaust manifold is not at the lowest part of the interlayer water cavity, and the water outlet is not at the highest part of the interlayer water cavity, and the interlayer pipe cavity has a complex shape and inconsistent resistance, the circulating water can pass through the route with the smallest resistance, so that a plurality of dead angles which do not participate in circulation exist in the interlayer, the annular area positioned at the exhaust manifold side is favorable for causing uneven temperature at each part, heavy results in exhaust manifold blow out.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a realize through following scheme:

this kind of explosion-proof cast iron exhaust manifold, include the intermediate layer body that constitutes by outer water jacket chamber and inlayer waste gas chamber, set up six on the intermediate layer body and link to each cylinder body of engine, with communicating air inlet in inlayer waste gas chamber, one link to each other with the turbo charger import, with communicating gas outlet in inlayer waste gas chamber, its characterized in that: the water outlet with an upward opening and communicated with the outer-layer water jacket cavity is formed in the upper end face close to one end of the body, the water inlet with a downward opening and communicated with the outer-layer water jacket cavity is formed in the lower end face close to the other end of the body, the water outlet is the highest position of the outer-layer water jacket cavity, and the water inlet is the bottommost position of the outer-layer water jacket cavity.

Furthermore, a temperature sensor support is fixedly arranged in the middle of the body on the side opposite to the engine. It is here easy to characterize the overall temperature of the exhaust manifold.

Further, the gas outlet is located between the fourth port and the fifth port in the six gas inlets, and the water outlet is located at one end of the body, which is short from the gas outlet. Is convenient for maintenance.

Furthermore, the inner parts of the outer-layer water jacket cavities of the exhaust manifolds are completely communicated with each other, and no choked flow or accumulated water cavity exists between the water inlet and the water outlet of the outer-layer water jacket cavities. Preventing the occurrence of non-circulating dead water.

Furthermore, a mounting through hole with the diameter of 12mm penetrating the whole exhaust manifold is formed at the position corresponding to each air inlet. The uniform arrangement, the even atress is convenient for install.

Further, the air outlet is provided with a flange connected with the turbocharger, the flange surface is processed according to the standard of an explosion-proof surface in the coal industry standard MT990-2006 of the people's republic of China, and an M12 threaded hole for installation is processed around the air outlet. The universality is good.

Further, the water inlet is an English threaded mounting hole of NP/T3/4. The butt joint with a standard pipe fitting is convenient.

Furthermore, the water outlet is an English threaded mounting hole of NP/T1/2. The butt joint with a standard pipe fitting is convenient.

Compared with the prior art, the double-layer structure of the explosion-proof exhaust manifold prevents a large amount of heat generated by engine exhaust gas from being dissipated by continuously circulating flowing water which is led to the outer layer; the water is used as a heat transfer medium, so that the conditions of cracking and the like caused by sudden heating or cooling of the exhaust manifold are avoided, the safety is higher, and the damage of the engine is effectively avoided. And a temperature sensor is arranged on the outer side of the exhaust manifold, so that the surface temperature of the engine is monitored in real time, the explosion-proof requirement is ensured, and the surface temperature of the engine exhaust pipe is kept below 150 degrees. The explosion-proof exhaust manifold has compact and efficient structure and convenient daily maintenance, and is suitable for severe working environment in the underground coal mine. The production mode of pouring and forming after die opening is adopted, the production efficiency is high, and the production cost is low. The water outlet is the highest position of the outer layer water jacket cavity, the water inlet is the bottommost position of the outer layer water jacket cavity, circulating water is circulated fully without dead water, and the temperature of the whole exhaust manifold is uniform.

Drawings

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

Fig. 2 is a rear view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a bottom view of fig. 1.

Fig. 5 is a sectional view taken along the line a in fig. 3.

Fig. 6 is a sectional view taken along line B of fig. 3.

Fig. 7 is a cross-sectional view taken along line C of fig. 5.

Detailed Description

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

an explosion-proof cast iron exhaust manifold as shown in fig. 1-6 comprises an interlayer body consisting of an outer water jacket cavity 4 and an inner exhaust gas cavity 5, wherein six air inlets 3 connected with each cylinder body of an engine and communicated with the inner exhaust gas cavity 5 and an air outlet 6 connected with an inlet of a turbocharger and communicated with the inner exhaust gas cavity 5 are arranged on the interlayer body, a water outlet 1 with an upward opening and communicated with the outer water jacket cavity is arranged on the upper end surface close to one end of the body, a water inlet 2 with a downward opening and communicated with the outer water jacket cavity is arranged on the lower end surface close to the other end of the body, the water outlet 1 is the highest position of the outer water jacket cavity 4, and the water inlet 2 is the lowest position of the outer water jacket cavity 4. The inner parts of outer-layer water jacket cavities of the exhaust manifolds are completely communicated with each other, and no choked flow or accumulated water cavity exists between a water inlet and a water outlet of the outer-layer water jacket cavities. And a temperature sensor support 7 is fixedly arranged in the middle of the body on the side back to the engine. The gas outlet 6 is located between the fourth port and the fifth port in the six gas inlets 3, and the water outlet 1 is located at a position which is short from the gas outlet 6 and is located at one end of the body. Through holes 8 with the diameter of 12mm penetrating the whole exhaust manifold are arranged at the positions corresponding to each air inlet 3. The gas outlet 6 is provided with a flange connected with the turbocharger, the flange surface is processed according to the standard of an explosion-proof surface in the coal industry standard MT990-2006 of the people's republic of China, and an M12 threaded hole for mounting the turbocharger is processed around the gas outlet 6. The water inlet 2 is an English threaded mounting hole of NP/T3/4. The water outlet 1 is an English threaded mounting hole of NP/T1/2.

Claims

1. The utility model provides an explosion-proof cast iron exhaust manifold, includes the intermediate layer body that comprises outer jacket cavity (4) and inlayer exhaust cavity (5), set up six on the intermediate layer body and link to each other with each cylinder body of engine, with communicating air inlet (3) of inlayer exhaust cavity (5), one link to each other with the turbo charger import, with communicating gas outlet (6) of inlayer exhaust cavity (5), its characterized in that: the water outlet (1) with an upward opening and communicated with the outer water jacket cavity is formed in the upper end face close to one end of the body, the water inlet (2) with a downward opening and communicated with the outer water jacket cavity is formed in the lower end face close to the other end of the body, the water outlet (1) is the highest position of the outer water jacket cavity (4), and the water inlet (2) is the lowest position of the outer water jacket cavity (4).

2. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: and a temperature sensor support (7) is fixedly arranged in the middle of the body on the side back to the engine.

3. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: gas outlet (6) are located six in gas inlet (3) between fourth mouth and the fifth mouth, delivery port (1) are located the distance gas outlet (6) are shorter the one end of body.

4. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: the inner parts of outer-layer water jacket cavities of the exhaust manifolds are completely communicated with each other, and no choked flow or accumulated water cavity exists between a water inlet and a water outlet of the outer-layer water jacket cavities.

5. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: and through holes (8) with the diameter of 12mm penetrating the whole exhaust manifold are formed at the positions corresponding to the air inlets (3).

6. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: the gas outlet (6) is provided with a flange connected with the turbocharger, the flange surface is processed according to the standard of an explosion-proof surface in the coal industry standard MT990-2006 of the people's republic of China, and an M12 threaded hole for mounting the turbocharger is processed around the gas outlet (6).

7. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: the water inlet (2) is an English threaded mounting hole of NP/T3/4.

8. An explosion-proof cast iron exhaust manifold according to claim 1, wherein: the water outlet (1) is an English threaded mounting hole of NP/T1/2.