Exhaust manifold of explosion-proof diesel engine

Abstract

The utility model relates to the technical field of explosion-proof diesel engines, and discloses an explosion-proof diesel engine exhaust manifold which comprises annular bosses arranged at the connecting ends of two exhaust manifold bodies respectively, and the sides, away from each other, of the annular bosses are sleeved with a first connecting flange and a second connecting flange respectively. The first connecting flange and the second connecting flange can slide and rotate in the axial direction of the two exhaust main pipes respectively, bolt holes matched with each other are formed in the first connecting flange and the second connecting flange, and the bolt holes in the first connecting flange and the second connecting flange are connected through bolts. According to the utility model, the flange structure connected with the exhaust manifold is arranged to be a rotatable structure, so that the assembly and maintenance difficulty is greatly reduced, the requirement on the position accuracy of the bolt holes on the flange is lower, the rejection rate of flange processing is greatly reduced, and the processing cost is effectively saved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof diesel engines, in particular to an exhaust manifold for explosion-proof diesel engines. Background Art

[0002] Explosion-proof diesel engines are mainly used to provide power for trucks and support transporters traveling in underground coal mine tunnels. They can also be used to power generator sets and water pump sets used in mines, as well as explosion-proof power machinery used in flammable and explosive environments such as petroleum and chemical industries.

[0003] Currently, explosion-proof diesel engine exhaust manifolds are typically made of cast iron or cast steel. Flanges are cast at both ends, forming an integrated structure. When bolting the two exhaust manifolds together, errors in the relative positioning of the flange holes and the limited space for inserting the bolts can make it difficult to install or remove the flange bolts, significantly complicating assembly and maintenance. Furthermore, the high precision required for the flange hole positioning increases the flange scrap rate. Utility Model Content

[0004] The purpose of the utility model is to provide an explosion-proof diesel engine exhaust manifold, which greatly reduces the difficulty of assembly and maintenance by setting the flange structure connected to the exhaust manifold to a rotatable structure, and has low requirements on the position accuracy of the bolt holes on the flange, greatly reducing the scrap rate of the flange processing and effectively saving processing costs.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] An explosion-proof diesel engine exhaust manifold includes annular bosses respectively arranged at the connecting ends of two exhaust manifolds, a first connecting flange and a second connecting flange respectively sleeved on the sides of the annular bosses away from each other, the first connecting flange and the second connecting flange being respectively slidable and rotatable along the axes of the two exhaust manifolds, the first connecting flange and the second connecting flange being provided with mutually matching bolt holes, and the bolt holes on the first connecting flange and the second connecting flange being connected by bolts.

[0007] By adopting the above technical solution, when assembling the two exhaust manifolds, the first connecting flange and the second connecting flange are first sleeved on the two exhaust manifolds, and then the annular bosses of the connecting sections of the two exhaust manifolds are pressed tightly, and then the first connecting flange and the second connecting flange are slid to a position pressed tightly against the two annular bosses, and finally the first connecting flange and the second connecting flange are rotated so that the first connecting flange and the second connecting flange are adjusted to a one-to-one correspondence between the bolt holes, and then the bolt holes on the first connecting flange and the second connecting flange are connected in sequence by bolts, thereby realizing the assembly of the two exhaust manifolds. During the assembly process, the first connecting flange and the second connecting flange can be rotated along the two exhaust manifolds respectively, so that the bolt holes used for connection with the bolts can always be oriented towards a position convenient for inserting and tightening the bolts, thereby greatly reducing the difficulty of assembling and maintaining the exhaust manifolds. Moreover, since the first connecting flange and the second connecting flange can be rotated during the assembly process, the requirements for the position accuracy of the bolt holes on the flanges are relatively low, which greatly reduces the scrap rate of flange processing and effectively saves processing costs.

[0008] The utility model is further configured as follows: mutually matching sealing grooves are respectively provided on the sides of the annular bosses at the connecting ends of the two exhaust manifolds that are close to each other, and a sealing device is provided in the sealing groove on the annular boss of one of the exhaust manifolds.

[0009] By adopting the above technical solution, when the two exhaust manifolds are assembled, the sealing grooves on the annular bosses at the connecting ends of the two exhaust manifolds cooperate with each other to form a sealed cavity. At the same time, the sealing device in the sealing groove on the annular boss of one of the exhaust manifolds is used to seal the contact surfaces of the two annular bosses when the two exhaust manifolds are assembled, so that after the two exhaust manifolds are connected, the sealing performance is better, which can effectively avoid leakage at the assembly position of the exhaust manifolds, and greatly improve the explosion-proof performance of the explosion-proof diesel engine.

[0010] The utility model is further configured as follows: the sealing device includes an elastic film for sealing the sealing groove, the elastic film is fixedly connected to the sealing groove, and one side of the elastic film is provided with a sealing drive mechanism for driving it to seal the sealing groove on the annular boss of another exhaust manifold.

[0011] By adopting the above technical solution, the sealing drive mechanism drives the elastic film to deform, so that the elastic film extends from the sealing groove fixedly connected to it to the sealing groove on the annular boss of the other exhaust manifold, thereby realizing the sealing of the contact surfaces of the two annular bosses when the two exhaust manifolds are assembled. The use of elastic film for sealing not only has a simple structure and low cost, but also has a good sealing effect.

[0012] The present invention is further configured as follows: the sealing drive mechanism includes a piston ring arranged on one side of the elastic film, the piston ring is axially slidably matched with the sealing groove, and the piston ring is located on the side of the sealing groove away from the elastic film.

[0013] By adopting the above technical solution, when the piston ring moves toward the side close to the elastic film, the air pressure in the space between the piston ring and the elastic film gradually increases. The increase in air pressure causes the elastic film to deform toward the side away from the piston until it enters the sealing groove on the annular boss of the other exhaust manifold, thereby achieving the effect of sealing the contact surfaces of the two annular bosses when the two exhaust manifolds are assembled.

[0014] The utility model is further configured as follows: a driving ring is fixedly provided on the side of the piston ring away from the elastic rubber sheet, the driving ring is axially slidably engaged with the driving groove on the other side of the annular boss, and the driving ring protrudes from the side wall of the annular boss.

[0015] By adopting the above technical solution, when the annular bosses of the connecting sections of the two exhaust manifolds are pressed against each other, the driving ring protruding from the annular bosses will be squeezed, causing the driving ring to slide axially along the driving groove in which it is located. During the axial sliding of the driving ring, the piston ring will be driven to move toward the side close to the elastic film, thereby driving the elastic film to deform and realize sealing of the contact surfaces of the two annular bosses when the two exhaust manifolds are assembled. The entire driving process is simple and easy to operate.

[0016] The utility model is further configured as follows: a return spring is further provided on the side of the piston ring away from the elastic film, one end of the return spring is fixed on the piston ring, and the other end of the return spring is fixed to the bottom of the sealing groove.

[0017] By adopting the above technical solution, the return spring is used to support the piston ring, so that the piston ring has better stability during the reciprocating movement.

[0018] The present invention is further configured as follows: the elastic film is made of high temperature resistant material.

[0019] By adopting the above technical solution, the elastic film made of high-temperature resistant material can withstand higher temperatures and better adapt to the working environment of the exhaust manifold, ensuring that the sealing performance of the exhaust manifold is more stable after connection, and the elastic film is not easy to age and has a longer service life.

[0020] The beneficial effects of the utility model are:

[0021] 1. When assembling the two exhaust manifolds in the present invention, the first connecting flange and the second connecting flange are first sleeved on the two exhaust manifolds, and then the annular bosses of the connecting sections of the two exhaust manifolds are pressed tightly, and then the first connecting flange and the second connecting flange are slid to a position pressed tightly against the two annular bosses, and finally the first connecting flange and the second connecting flange are rotated so that the first connecting flange and the second connecting flange are adjusted to correspond to the bolt holes one by one, and then the bolt holes on the first connecting flange and the second connecting flange are connected in sequence by bolts, thereby realizing the assembly of the two exhaust manifolds. During the assembly process, the first connecting flange and the second connecting flange can be rotated along the two exhaust manifolds respectively, so that the bolt holes used for connection with the bolts can always be oriented to a position that is convenient for inserting and tightening the bolts, thereby greatly reducing the difficulty of assembling and maintaining the exhaust manifolds. Moreover, since the first connecting flange and the second connecting flange can be rotated during the assembly process, the requirements for the position accuracy of the bolt holes on the flanges are relatively low, which greatly reduces the scrap rate of flange processing and effectively saves processing costs.

[0022] 2. When the two exhaust manifolds in the utility model are assembled, the sealing grooves on the annular bosses at the connecting ends of the two exhaust manifolds cooperate with each other to form a sealed cavity. At the same time, the sealing device in the sealing groove on the annular boss of one of the exhaust manifolds is used to seal the contact surfaces of the two annular bosses when the two exhaust manifolds are assembled, so that after the two exhaust manifolds are connected, the sealing performance is better, which can effectively avoid leakage at the assembly position of the exhaust manifolds, and greatly improve the explosion-proof performance of the explosion-proof diesel engine.

[0023] 3. The utility model drives the elastic film to deform through the sealing drive mechanism, so that the elastic film extends from the sealing groove fixedly connected to it to the sealing groove on the annular boss of the other exhaust manifold, thereby realizing the sealing of the contact surfaces of the two annular bosses when the two exhaust manifolds are assembled. The use of elastic film for sealing not only has a simple structure and low cost, but also has a good sealing effect.

[0024] 4. In the utility model, when the annular bosses of the connecting sections of the two exhaust manifolds are pressed against each other, the driving ring protruding from the annular bosses will be squeezed, causing the driving ring to slide axially along the driving groove in which it is located. During the axial sliding of the driving ring, the piston ring will be driven to move toward the side close to the elastic film. When the piston ring moves toward the side close to the elastic film, the air pressure in the space between the piston ring and the elastic film gradually increases. The increase in air pressure causes the elastic film to deform toward the side away from the piston until it enters the sealing groove on the annular boss of the other exhaust manifold. Therefore, the contact surfaces of the two annular bosses are sealed when the two exhaust manifolds are assembled. The entire sealing process is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 The utility model is a schematic diagram of the cross-sectional structure of an explosion-proof diesel engine exhaust manifold.

[0027] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the middle A.

[0028] In the figure, 1. annular boss; 2. first connecting flange; 3. second connecting flange; 4. bolt hole; 5. bolt; 6. sealing groove; 7. sealing device; 71. elastic film; 72. sealing drive mechanism; 721. piston ring; 722. drive ring; 723. return spring; 8. exhaust manifold. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0030] like Figures 1-2 As shown, an explosion-proof diesel engine exhaust manifold includes annular bosses 1 respectively arranged at the connecting ends of two exhaust manifolds 8, and a first connecting flange 2 and a second connecting flange 3 are respectively sleeved on the side of the annular bosses 1 away from each other. The first connecting flange 2 and the second connecting flange 3 can respectively slide and rotate along the axial direction of the two exhaust manifolds 8. The first connecting flange 2 and the second connecting flange 3 are both provided with bolt holes 4 that match each other, and the bolt holes 4 on the first connecting flange 2 and the second connecting flange 3 are connected by bolts 5.

[0031] Furthermore, the annular bosses 1 at the connecting ends of the two exhaust manifolds 8 are provided with mutually matching sealing grooves 6 on their respective sides close to each other, and a sealing device 7 is provided in the sealing groove 6 on the annular boss 1 of one of the exhaust manifolds 8 .

[0032] Furthermore, the sealing device 7 includes an elastic film 71 for sealing the sealing groove 6, the elastic film 71 is fixedly connected to the sealing groove 6, and a sealing drive mechanism 72 is provided on one side of the elastic film 71 for driving it to seal the sealing groove 6 on the annular boss 1 of another exhaust manifold 8.

[0033] Furthermore, the sealing drive mechanism 72 includes a piston ring 721 arranged on one side of the elastic film 71 , the piston ring 721 axially slidingly cooperates with the sealing groove 6 , and the piston ring 721 is located on the side of the sealing groove 6 away from the elastic film 71 .

[0034] Furthermore, a drive ring 722 is fixedly provided on the side of the piston ring 721 away from the elastic film 71 , and the drive ring 722 is axially slidably engaged with the drive groove 724 on the other side of the annular boss 1 , and the drive ring 722 protrudes from the side wall of the annular boss 1 .

[0035] Furthermore, a return spring 723 is provided on the side of the piston ring 721 away from the elastic film 71 , one end of the return spring 723 is fixed on the piston ring 721 , and the other end of the return spring 723 is fixed to the bottom of the sealing groove 6 .

[0036] Furthermore, the elastic film 71 is made of high temperature resistant material.

[0037] The working principle of the present invention is as follows: when assembling the two exhaust manifolds 8, the first connecting flange 2 and the second connecting flange 3 are first sleeved on the two exhaust manifolds 8, and then the annular bosses 1 of the connecting sections of the two exhaust manifolds 8 are pressed tightly, and then the first connecting flange 2 and the second connecting flange 3 are slid to a position pressed tightly against the two annular bosses 1, and finally the first connecting flange 2 and the second connecting flange 3 are rotated so that the first connecting flange 2 and the second connecting flange 3 are adjusted to correspond one to one with the bolt holes 4, and then the bolt holes 4 on the first connecting flange 2 and the second connecting flange 3 are connected in sequence by bolts 5, thereby realizing the assembly of the two exhaust manifolds 8. During the assembly process, the first connecting flange 2 and the second connecting flange 3 can be rotated along the two exhaust manifolds 8 respectively, so that the bolt holes 4 used to cooperate with the bolts 5 for connection can always be oriented towards a position that is convenient for inserting and tightening the bolts 5, thereby greatly reducing the difficulty of assembling and maintaining the exhaust manifolds 8. Moreover, since the first connecting flange 2 and the second connecting flange 3 can be rotated during the assembly process, the requirements for the position accuracy of the bolt holes 4 on the flanges are low, which greatly reduces the scrap rate of flange processing and effectively saves processing costs.

[0038] Among them, when the annular boss 1 of the connecting section of the two exhaust manifolds 8 is pressed tightly, the driving ring 722 protruding from the annular boss 1 will be squeezed, causing the driving ring 722 to slide axially along the driving groove 724 in which it is located. During the axial sliding of the driving ring 722, the piston ring 721 will be driven to move toward the side close to the elastic film 71. When the piston ring 721 moves toward the side close to the elastic film 71, the air pressure in the space between the piston ring 721 and the elastic film 71 gradually increases. The increase in air pressure causes the elastic film 71 to deform toward the side away from the piston until it enters the sealing groove 6 on the annular boss 1 of the other exhaust manifold 8. Therefore, the contact surface of the two annular bosses 1 is sealed when the two exhaust manifolds 8 are assembled. The entire sealing process is simple and easy to operate.

Claims

1. An explosion-proof diesel engine exhaust manifold, characterized by: The invention comprises an annular boss (1) respectively arranged at the connection ends of two exhaust manifolds (8); a first connecting flange (2) and a second connecting flange (3) are respectively sleeved on the mutually distant sides of the annular boss (1); the first connecting flange (2) and the second connecting flange (3) can slide and rotate along the axial directions of the two exhaust manifolds (8); the first connecting flange (2) and the second connecting flange (3) are both provided with mutually matching bolt holes (4); the bolt holes (4) on the first connecting flange (2) and the second connecting flange (3) are connected by bolts (5).

2. The explosion-proof diesel engine exhaust manifold according to claim 1, characterized in that: Mutually matching sealing grooves (6) are provided on the adjacent sides of the annular bosses (1) at the connection ends of the two exhaust manifolds (8), and a sealing device (7) is provided in the sealing groove (6) on the annular boss (1) of one exhaust manifold (8).

3. The explosion-proof diesel engine exhaust manifold according to claim 2, characterized in that: The sealing device (7) comprises an elastic film (71) for sealing the sealing groove (6), the elastic film (71) being fixedly connected to the sealing groove (6), and a sealing drive mechanism (72) for driving the elastic film (71) to seal the sealing groove (6) on the annular boss (1) of another exhaust manifold (8) is provided on one side of the elastic film (71).

4. The explosion-proof diesel engine exhaust manifold according to claim 3, characterized in that: The sealing drive mechanism (72) comprises a piston ring (721) arranged on one side of the elastic film (71), the piston ring (721) being axially slidably matched with the sealing groove (6), and the piston ring (721) being located on the side of the sealing groove (6) away from the elastic film (71).

5. The explosion-proof diesel engine exhaust manifold according to claim 4, characterized in that: A drive ring (722) is fixedly provided on the side of the piston ring (721) away from the elastic film (71), and the drive ring (722) is axially slidably engaged with the drive groove (724) on the other side of the annular boss (1), and the drive ring (722) protrudes from the side wall of the annular boss (1).

6. The explosion-proof diesel engine exhaust manifold according to claim 5, characterized in that: A return spring (723) is further provided on the side of the piston ring (721) away from the elastic film (71), one end of the return spring (723) is fixed on the piston ring (721), and the other end of the return spring (723) is fixed on the bottom of the sealing groove (6).

7. The explosion-proof diesel engine exhaust manifold according to claim 6, characterized in that: The elastic film (71) is made of high temperature resistant material.

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