All-in-one multi-layer liquid-cooled exhaust device for explosion-proof mining applications

Abstract

The present invention relates to an integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines, comprising an exhaust device body; the exhaust device body is a columnar structure with a closed end and an open front end and tilted upward; a supercharger interface for connecting to a turbocharger is provided at the open front end of the exhaust device body; the exhaust device body comprises an outer tube and an inner tube; a coolant flow channel for circulating coolant is provided between the tube walls of the outer tube and the inner tube; an exhaust flow channel for circulating exhaust gas discharged by the engine is provided on the inner side of the inner tube. The present invention significantly reduces the surface temperature of the engine exhaust pipe, controls the exhaust temperature at the same time, and improves the engine performance; does not use welding technology, improves product quality, consistency and safety, and reduces maintenance costs.

Description

Technical Field

[0001] The invention relates to the technical field of diesel engine intake and exhaust systems, and in particular to an integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines. Background Art

[0002] When underground mining equipment is working, the engine will emit high temperature exhaust gas, which will increase the surface temperature of the entire exhaust system parts. In order to ensure that the equipment complies with the requirements of coal mine explosion-proof safety regulations ("MT990-2006 General Technical Conditions for Explosion-proof Diesel Engines for Mining") and the engine operates normally, an integrated multi-layer liquid-cooled exhaust device dedicated to explosion-proof mining is developed.

[0003] The defects of the prior art are:

[0004] 1. As Figure 2 As shown, since the prior art mining explosion-proof exhaust devices are generally manufactured by welding rather than integral casting, the processing is complicated and difficult, the product consistency is poor, and the effect of controlling the engine exhaust temperature and reducing the surface temperature of the device is not ideal.

[0005] 2. Since the high temperature of the prior art mining explosion-proof exhaust device is transmitted to the fixing bolts during operation, the installation reliability is reduced.

[0006] 3. Due to the inadequate control of the welding process of the prior art mining explosion-proof exhaust device, the exhaust system seal may fail, resulting in leakage of high-temperature gas and safety accidents. Summary of the invention

[0007] In response to the above-mentioned problems, the present invention provides an integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines, which aims to significantly reduce the surface temperature of the engine exhaust pipe, while controlling the exhaust temperature and improving engine performance; without using welding technology, it improves product quality, consistency and safety and reduces maintenance costs.

[0008] To solve the above problems, the technical solution provided by the present invention is:

[0009] An integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mining, comprising an exhaust device body;

[0010] The exhaust device body is a columnar structure with a closed end and an open front end that is inclined upward; a supercharger interface for connecting to a turbocharger is provided at the open front end of the exhaust device body; the exhaust device body comprises an outer tube and an inner tube; a coolant flow channel for circulating coolant is provided between the tube walls of the outer tube and the inner tube; an exhaust flow channel for circulating exhaust gas discharged by the engine is provided on the inner side of the inner tube.

[0011] Preferably, the outer tube, the inner tube, the coolant flow channel, the exhaust flow channel and the supercharger interface of the exhaust device body are an integral structure formed by casting.

[0012] Preferably, one side of the exhaust device body is fixedly connected to a bracket for fixing and installing the exhaust device body; the exhaust device body and the bracket are an integral structure formed by casting.

[0013] Preferably, a connecting flange is fixedly connected to the opposite side of the bracket of the exhaust device body; the exhaust device body is connected to the engine cylinder head flange through the connecting flange; the exhaust device body and the connecting flange are an integral structure formed by casting.

[0014] Preferably, a water hole for taking coolant from the engine cooling system is provided at the end of the upper end surface of the exhaust device body; the coolant flow channel is connected to the engine cooling system through the water hole.

[0015] Preferably, an exhaust gas duct hole is symmetrically arranged on the left and right sides of the connecting flange; the exhaust gas duct is connected with the air duct of the engine cylinder head through the exhaust gas duct hole.

[0016] Preferably, a bolt hole is symmetrically arranged on each of the upper and lower sides of the exhaust duct hole.

[0017] Preferably, the exhaust gas flow passage and the air passage of the engine cylinder head are fixedly sealed by a gasket and bolts; the connection part of the exhaust gas flow passage and the turbocharger is fixedly sealed by a gasket and bolts.

[0018] Preferably, a first effective width of the explosion-proof joint surface between the exhaust gas flow passage and the engine cylinder head is not less than 13 mm.

[0019] Preferably, the second effective width from the inner edge of the explosion-proof joint surface to the edge of the bolt hole is not less than 9 mm.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention uses the coolant that continuously flows in the coolant flow channel to take away the heat transferred by the exhaust gas, thereby effectively reducing the surface temperature of the exhaust device, reducing the exhaust temperature and improving the engine performance, while improving reliability and safety.

[0022] 2. Since the present invention adopts an integrated casting process, multi-layer welding is not required, thereby improving product consistency and reliability.

[0023] 3. The present invention has a simple structure, high reliability and long parts life, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1a It is a schematic front view of an exhaust device according to a specific embodiment of the present invention;

[0025] Figure 1b A schematic side view of an exhaust device according to a specific embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of a front view of an exhaust device in the prior art;

[0027] Figure 3 is a schematic cross-sectional view of an exhaust device according to a specific embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a vertical cross-sectional view of an exhaust device according to a specific embodiment of the present invention;

[0029] Figure 5 A schematic top view of an exhaust device according to a specific embodiment of the present invention;

[0030] Figure 6 A schematic rear view of an exhaust device according to a specific embodiment of the present invention;

[0031] Figure 7 for Figure 6 Schematic diagram of a partial enlarged view of the connecting flange 300.

[0032] Among them: 100. Exhaust device body, 200. Bracket, 300. Connection flange, 400. Supercharger interface, 110. Outer pipe, 120. Inner pipe, 130. Coolant flow channel, 140. Exhaust flow channel, 150. Water hole, 310. Exhaust channel hole, 320. Bolt hole, 330. Flameproof joint surface DETAILED DESCRIPTION

[0033] The present invention is further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0034] like Figure 1a , Figure 1b , Figure 3 , Figure 4 As shown, an integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines includes an exhaust device body 100 .

[0035] The exhaust device body 100 is a columnar structure with a closed end and an open front end that is inclined upward. A supercharger interface 400 for connecting to a turbocharger is provided at the open front end of the exhaust device body 100. The exhaust device body 100 includes an outer tube 110 and an inner tube 120. A coolant flow channel 130 for circulating coolant is provided between the tube walls of the outer tube 110 and the inner tube 120. An exhaust flow channel 140 for circulating exhaust gas discharged from the engine is provided on the inner side of the inner tube 120.

[0036] It should be noted that the outer tube 110 , the inner tube 120 , the coolant flow channel 130 , the exhaust flow channel 140 and the supercharger interface 400 of the exhaust device body 100 are an integral structure formed by casting, thereby forming a multi-layer channel structure.

[0037] It should be noted that one side of the exhaust device body 100 is fixedly connected to a bracket 200 for fixing and installing the exhaust device body 100 ; the exhaust device body 100 and the bracket 200 are an integral structure formed by casting.

[0038] like Figure 6 As shown, it should be noted that a connecting flange 300 is fixedly connected to the opposite side of the bracket 200 of the exhaust device body 100; the exhaust device body 100 is connected to the engine cylinder head flange through the connecting flange 300; the exhaust device body 100 and the connecting flange 300 are an integral structure formed by casting.

[0039] like Figure 7 As shown, it needs to be further explained that an exhaust gas passage hole 310 is symmetrically arranged on the left and right sides of the connecting flange 300; the exhaust gas passage 140 is connected to the air passage of the engine cylinder head through the exhaust gas passage hole 310.

[0040] It should be further explained that a bolt hole 320 is symmetrically arranged on the upper and lower sides of the exhaust duct hole 310 .

[0041] It should be further explained that the exhaust gas flow passage 140 and the gas passage of the engine cylinder head adopt a fixed sealing method of tightening with a gasket and bolts; the connection part of the exhaust gas flow passage 140 and the turbocharger adopts a fixed sealing method of tightening with a gasket and bolts.

[0042] In this specific embodiment, the first effective width of the flameproof joint surface 330 between the exhaust gas flow passage 140 and the engine cylinder head is not less than 13 mm.

[0043] The second effective width from the inner edge of the flameproof joint surface 330 to the edge of the bolt hole 320 is not less than 9 mm.

[0044] like Figure 5As shown, it should be noted that a water hole 150 for taking coolant from the engine cooling system is provided at the end of the upper end surface of the exhaust device body 100; the coolant flow channel 130 is connected to the engine cooling system through the water hole 150.

[0045] It should be further explained that the coolant flow channel 130 is filled with flowing coolant when working; the low-temperature coolant flows in from the water hole 150, flows out from the supercharger interface 400 on the supercharger mounting surface and enters the supercharger water jacket, thereby taking away part of the exhaust gas heat and reducing the temperature of the exhaust device body 100.

[0046] It should be noted that the working principle of the exhaust device of the present invention is as follows: when the diesel engine is working, the exhaust gas is discharged through the exhaust gas flow channel 140; during the exhaust process, the outer tube 110 and the inner tube 120 will generate a rapid temperature rise, and at the same time, the coolant flow channel 130 formed between the outer tube 110 and the inner tube 120 is filled with flowing low-temperature coolant, which contacts the outer wall of the inner tube 120 to achieve the effect of taking away heat and cooling the tube wall, thereby reducing the temperature of the inner tube 120 of the exhaust device and the exhaust gas inside, thereby achieving the effect of controlling the exhaust temperature and improving the engine performance. In addition, due to the cooling effect of the coolant inside the outer tube 110, the surface temperature of the entire exhaust device is lower than that of a general exhaust device, so that the surface temperature can be lower than 150°C as required by the regulations on explosion-proof safety equipment for mining, and the heat radiation of the exhaust system to the outside can be reduced.

[0047] It should be further explained that the present invention has been applied to three-stage / four-stage explosion-proof diesel engines for mining, and can also be used in applications such as marine engines that require liquid-cooled exhaust devices.

[0048] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0049] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0050] The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0051] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines, characterized in that: It comprises an exhaust device body (100); The exhaust device body (100) is a columnar structure with a closed end and an open front end that is inclined upward; a supercharger interface (400) for connecting to a turbocharger is provided at the open front end of the exhaust device body (100); the exhaust device body (100) comprises an outer tube (110) and an inner tube (120); a coolant flow channel (130) for circulating coolant is provided between the tube walls of the outer tube (110) and the inner tube (120); and an exhaust flow channel (140) for circulating exhaust gas discharged by an engine is provided on the inner side of the inner tube (120).

2. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 1 is characterized in that: The outer tube (110), the inner tube (120), the coolant flow channel (130), the exhaust flow channel (140) and the supercharger interface (400) of the exhaust device body (100) are an integral structure formed by casting.

3. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 2 is characterized in that: One side of the exhaust device body (100) is fixedly connected to a bracket (200) for fixing and installing the exhaust device body (100); the exhaust device body (100) and the bracket (200) are an integral structure formed by casting.

4. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 3 is characterized in that: A connecting flange (300) is fixedly connected to the opposite side of the bracket (200) of the exhaust device body (100); the exhaust device body (100) is connected to the engine cylinder head flange through the connecting flange (300); the exhaust device body (100) and the connecting flange (300) are an integral structure formed by casting.

5. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 4 is characterized in that: A water hole (150) for taking coolant from an engine cooling system is provided at the end of the upper end surface of the exhaust device body (100); the coolant flow channel (130) is connected to the engine cooling system through the water hole (150).

6. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 5 is characterized in that: An exhaust gas passage hole (310) is symmetrically arranged on the left and right sides of the connection flange (300); the exhaust gas passage (140) is connected to the air passage of the engine cylinder head through the exhaust gas passage hole (310).

7. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 6 is characterized in that: A bolt hole (320) is symmetrically arranged on the upper and lower sides of the exhaust duct hole (310).

8. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 7 is characterized in that: The exhaust gas flow passage (140) and the gas passage of the engine cylinder cover adopt a fixed sealing method of tightening with a sealing gasket and bolts; the exhaust gas flow passage (140) and the connection part of the turbocharger adopt a fixed sealing method of tightening with a sealing gasket and bolts.

9. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 8 is characterized in that: The first effective width of the flameproof joint surface (330) between the exhaust gas flow passage (140) and the engine cylinder head is not less than 13 mm.

10. The integrated multi-layer liquid-cooled exhaust device for explosion-proof applications in mines according to claim 9, characterized in that: A second effective width from the inner edge of the flameproof joint surface (330) to the edge of the bolt hole (320) is not less than 9 mm.

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