Explosion-proof diesel engine

Abstract

The utility model discloses an explosion-proof diesel engine which comprises a machine frame, an explosion-proof power assembly, an explosion-proof generator and an explosion-proof cooling assembly, the explosion-proof power assembly, the explosion-proof generator and the explosion-proof cooling assembly are all installed on the machine frame, and an explosion-proof starter is arranged on the machine frame. The explosion-proof starter is in transmission connection with the explosion-proof power assembly, and the explosion-proof power assembly, the explosion-proof generator and the explosion-proof cooling assembly are in transmission connection through a transmission wheel train. The explosion probability of the device can be effectively reduced through the explosion-proof power assembly, the explosion-proof generator and the explosion-proof cooling device, operation of the diesel engine can be effectively completed through transmission of the transmission wheel train, and the device can have the explosion-proof function in the using process through the structure. Therefore, the device can be better suitable for explosive environments.

Description

Technical Field

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

[0002] Diesel engines have the advantages of large torque and good economic performance. They are an internal combustion engine widely used in trucks or other large equipment. Diesel engines mainly consist of power components, generators, cooling components, etc. The mechanical energy output by diesel engines in actual work comes from the combustion of diesel.

[0003] Since the mechanical energy output by a diesel engine comes from the combustion of diesel, the flame, high temperature and sparks generated by the combustion of diesel during use may spread outside the intake and exhaust components. When the diesel engine is located in a space with explosive gas or dust environment, the overflow of flame, high temperature and sparks may cause an explosion. Therefore, existing diesel engines are not suitable for environments with explosion-proof requirements. Utility Model Content

[0004] (I) Purpose of the utility model

[0005] In order to solve the technical problems existing in the background technology, the utility model proposes an explosion-proof diesel engine. When using the device, the probability of explosion of the device can be effectively reduced through the explosion-proof power component, the explosion-proof motor and the explosion-proof cooling device, and the operation of the diesel engine can be effectively completed through transmission through the transmission gear train. Therefore, the above structure can make the device have an explosion-proof function when in use, so that the device can be better suitable for explosive environments.

[0006] (II) Technical solution

[0007] The utility model provides an explosion-proof diesel engine, comprising a frame, an explosion-proof power component, an explosion-proof motor and an explosion-proof cooling component, wherein the explosion-proof power component, the explosion-proof motor and the explosion-proof cooling component are all mounted on the frame, an explosion-proof starter is arranged on the frame, the explosion-proof starter is transmission-connected with the explosion-proof power component, and the explosion-proof power component, the explosion-proof motor and the explosion-proof cooling component are transmission-connected via a transmission gear train.

[0008] Preferably, the explosion-proof power assembly includes an explosion-proof air intake unit, an explosion-proof cylinder head unit, a cylinder body and an explosion-proof exhaust unit, the explosion-proof starter is drivingly connected to the cylinder body, the explosion-proof air intake unit and the explosion-proof cylinder head are both mounted on the frame, a plurality of the cylinder bodies are mounted on the explosion-proof cylinder head unit, the explosion-proof cylinder head unit is connected to an air outlet end of the explosion-proof air intake unit and are interconnected, the explosion-proof exhaust unit is mounted on the frame, and the air intake end of the explosion-proof exhaust unit is connected to an air outlet end of a plurality of the cylinder bodies and are interconnected.

[0009] Preferably, the explosion-proof air intake unit includes an air intake manifold and a flame arrester, wherein an air inlet and an air outlet are respectively provided at two ends of the air intake manifold, an eccentric transition pipe is provided at the air inlet, an end of the eccentric transition pipe away from the air inlet is provided with an elbow for connecting the flame arrester, an air intake panel is provided at the air outlet, the air intake panel is connected to the end of the intake manifold provided with the air outlet, and is interconnected with the air outlet, a plurality of air outlet openings are provided on the air intake panel, and the other end of the air intake panel is connected to the explosion-proof cylinder head unit.

[0010] Preferably, the explosion-proof cylinder head unit includes a cylinder head body and a transition plate, the cylinder head body is provided with a plurality of first openings, two transition plates are respectively connected to the two ends of the cylinder head body, one of the transition plates 11 is connected to the air intake panel 9, and the other transition plate 11 is connected to the explosion-proof exhaust unit, the transition plate is provided with an air channel for connecting the plurality of the first openings and the plurality of the air outlet openings, the transition plate is provided with a second opening for installing the cylinder body, the plurality of cylinder bodies are connected to the cylinder head body and to the first opening, and the water channel of the cylinder body is connected to the water channel of the cylinder head body.

[0011] Preferably, the explosion-proof exhaust unit includes an exhaust manifold, the air inlet end of the exhaust manifold is connected to the air outlet ends of the plurality of cylinder bodies and are interconnected, the exhaust manifold is connected to another transition plate, a first interface and a second interface are provided on the exhaust manifold, and the first interface and the second interface are both provided with exhaust flanges for connecting the boost valve and the blind plate flange.

[0012] Preferably, the explosion-proof cooling component includes a water pump and a cooler, the water pump is arranged on the frame, the water inlet end of the boost valve and the water inlet end of the water channel of the exhaust manifold are both communicated with the water outlet end of the water pump, the water outlet end of the boost valve and the water outlet end of the water channel of the exhaust manifold are both connected to the water inlet end of the cooler, the water outlet end of the cooler is connected to the water inlet end of the water pump, the bottom end of the water pump is provided with an auxiliary water outlet and a secondary water outlet, one end of the auxiliary water outlet is connected to the water channel of the exhaust manifold through a connecting pipe and communicated with each other, one end of the secondary water outlet is communicated with the water channel of the cylinder body, and the water outlet end of the water channel of the cylinder head is connected to the water inlet end of the cooler and communicated with each other.

[0013] Preferably, the transmission wheel system includes a first belt and a second belt, the cylinder body is provided with a crankshaft pulley, the water pump is provided with a water pump fan pulley, the explosion-proof motor is provided with a generator pulley, the water pump fan pulley is provided with two belt grooves with different inner diameters, the frame is provided with an automatic tensioning pulley, and a transmission disk is coaxially rotated on the automatic tensioning pulley, the crankshaft pulley, the water pump fan pulley and the automatic tensioning pulley are connected by a first belt transmission, the first belt is located in the belt groove with a small inner diameter, the water pump fan pulley, the generator pulley and the transmission disk are connected by a second belt, and the second belt is located in the belt groove with a large inner diameter.

[0014] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0015] In the utility model, when the device is used, the probability of explosion of the device can be effectively reduced through the explosion-proof power component, the explosion-proof motor and the explosion-proof cooling device, and the operation of the diesel engine can be effectively completed through the transmission through the transmission gear train. Therefore, the above structure can make the device have an explosion-proof function when in use, so that the device can be better suitable for explosive environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of an explosion-proof diesel engine.

[0017] Figure 2 The utility model is a schematic diagram of the structure of an intake manifold in an explosion-proof diesel engine.

[0018] Figure 3 The utility model is a schematic diagram of the installation structure of a crankshaft pulley in an explosion-proof diesel engine.

[0019] Figure 4 The utility model is a schematic diagram of the installation structure of a middle pressure rib plate of an explosion-proof diesel engine.

[0020] Figure 5 The utility model is a schematic diagram of the installation structure of the corrugated belt in the explosion-proof diesel engine.

[0021] Figure numerals: 1. frame; 2. explosion-proof motor; 3. explosion-proof starter; 4. cylinder block; 5. intake manifold; 6. flame arrester; 7. eccentric transition pipe; 8. elbow; 9. intake panel; 10. cylinder head body; 11. transition plate; 12. exhaust manifold; 13. exhaust flange; 14. boost valve; 15. blind flange; 16. water pump; 17. cooler; 18. first belt; 19. second belt; 20. crankshaft pulley; 21. water pump fan pulley; 22. generator pulley; 23. tensioner; 24. chuck; 25. intermediate shell; 26. ribbed plate; 27. bolt; 28. corrugated belt; 29. ​​flat belt. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0023] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, welding, riveting, bonding, etc., or a detachable connection, threaded connection, key connection, pin connection, etc., or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] like Figure 1-5As shown, an explosion-proof diesel engine proposed in the utility model comprises a frame 1, an explosion-proof power assembly, an explosion-proof motor 2 and an explosion-proof cooling assembly, wherein the explosion-proof power assembly, the explosion-proof motor 2 and the explosion-proof cooling assembly are all mounted on the frame 1, an explosion-proof starter 3 is arranged on the frame 1, the explosion-proof starter 3 is transmission-connected with the explosion-proof power assembly, and the explosion-proof power assembly, the explosion-proof motor 2 and the explosion-proof cooling assembly are transmission-connected via a transmission gear train.

[0026] In the utility model, when the device is used, the probability of explosion of the device can be effectively reduced through the explosion-proof power component, the explosion-proof motor 2 and the explosion-proof cooling device, and the operation of the diesel engine can be effectively completed through the transmission through the transmission gear train. Therefore, the above structure can make the device have an explosion-proof function when in use, so that the device can be better suitable for explosive environments.

[0027] In an optional embodiment, the explosion-proof power assembly includes an explosion-proof air intake unit, an explosion-proof cylinder head unit, a cylinder body 4 and an explosion-proof exhaust unit, the explosion-proof starter 3 is drivingly connected to the cylinder body 4, the explosion-proof air intake unit and the explosion-proof cylinder head are both mounted on the frame 1, a plurality of the cylinder bodies 4 are mounted on the explosion-proof cylinder head unit, the explosion-proof cylinder head unit is connected to the air outlet end of the explosion-proof air intake unit and are interconnected, the explosion-proof exhaust unit is mounted on the frame 1, the air intake end of the explosion-proof exhaust unit is connected to the air outlet ends of a plurality of the cylinder bodies 4 and are interconnected, the explosion-proof starter 3 can be used to effectively prevent explosions when the device is started to work, and the explosion-proof air intake unit and the explosion-proof exhaust unit can be used to realize explosion-proof performance during air intake and exhaust, the installation of the cylinder body 4 can be completed through the explosion-proof cylinder head, and the installation between the explosion-proof air intake unit, the explosion-proof exhaust unit and the cylinder body 4 can be realized through the explosion-proof cylinder head.

[0028] In an optional embodiment, the explosion-proof air intake unit includes an air intake manifold 5 and a flame arrester 6, wherein an air inlet and an air outlet are respectively provided at both ends of the air intake manifold 5, an eccentric transition pipe 7 is provided at the air inlet, and an elbow 8 for connecting the flame arrester 6 is provided at the end of the eccentric transition pipe 7 away from the air inlet, and an air intake panel 9 is provided at the air outlet, and the air intake panel 9 is connected to the end of the air intake manifold 5 provided with the air outlet, and is interconnected with the air outlet, and a plurality of air outlet openings are provided on the air intake panel 9, and the other end of the air intake panel 9 is connected to the explosion-proof cylinder head unit, and the air intake manifold 5 is connected to the flame arrester 6 through the elbow 8 and the eccentric transition pipe 7, and the explosion-proof performance of the device can be effectively improved by the flame arrester 6, and the installation position of the flame arrester 6 can be adjusted by the elbow 8 and the eccentric transition pipe 7, so that the flame arrester 6 can be further adapted to the national standard for production during installation, and the intake manifold 5 can be realized by the elbow 8. The air inlet is perpendicular to the air outlet of the flame arrester 6, so that the installation between the device and the flame arrester 6 can be further adapted. The gas direction can be corrected by the eccentric transition pipe 7, so that the intake of the intake manifold 5 is smoother. The inner diameter of the eccentric transition pipe 7 increases along the outlet end of the elbow 8 toward the intake end assembly of the intake manifold 5. The increase in the inner diameter assembly of the eccentric transition pipe 7 can effectively reduce the resistance of the gas when it enters the intake manifold 5 from the eccentric transition pipe 7, and because the cross-sectional area of ​​the gas becomes larger when it enters the intake manifold 5 from the eccentric transition pipe 7, the gas can be discharged more evenly from the matching assembly, and is connected to the intake manifold 5 through the intake panel 9, and the connection of the explosion-proof cylinder head unit is completed through the intake panel 9, so as to realize the installation of the intake manifold 5 and the explosion-proof cylinder head unit, and multiple outlet openings can be used for outlet to realize the connection between the intake manifold 5 and the explosion-proof cylinder head unit, so as to effectively match the installation of the device and the explosion-proof cylinder head unit.

[0029] The flame arrester includes a chuck 24, an intermediate shell 25 and a connecting flange. The two ends of the intermediate shell 25 are respectively provided with an air inlet and an air outlet. The chuck 24 and the connecting flange are respectively arranged at the two ends of the intermediate shell 25. The chuck 24 is connected to the intermediate shell 25 and communicates with the air inlet. The connecting flange is connected to the intermediate shell 25 and communicates with the air outlet. The intermediate shell 25 is connected to the elbow 8 through the connecting flange. Two ribbed plates 26 are arranged in the intermediate shell 25. The ribbed plates 26 are provided with through holes for the bolts 27 to pass through. One end of the bolt 27 passes through the ribbed plates 26 in sequence. The bolt 27 extends through one of the through holes and extends out of the other through hole. One end of the bolt 27 abuts against one of the ribbed plates 26. The other end of the bolt 27 is coaxially provided with a nut, and the nut abuts against the other ribbed plate 26. The inner wall of the intermediate shell 25 and the outer end of the bolt 27 are coaxially provided with a flat belt 29 connected end to end. The flat belt 29 is tightly matched with the inner wall of the intermediate shell 25. A plurality of corrugated belts 28 connected end to end and a plurality of flat belts 29 connected end to end are arranged between two flat belts 29. The plurality of corrugated belts 28 and the plurality of flat belts 29 are alternately arranged.

[0030] In an optional embodiment, the explosion-proof cylinder head unit includes a cylinder head body 10 and a transition plate 11, the cylinder head body 10 is provided with a plurality of first openings, two transition plates 11 are respectively connected to the two ends of the cylinder head body 10, one of the transition plates 11 is connected to the air intake panel 9, and the other transition plate 11 is connected to the explosion-proof exhaust unit, the transition plate 11 is provided with an air duct for connecting the plurality of first openings and the plurality of air outlet openings, the transition plate 11 is provided with a second opening for installing the cylinder body 4, and the plurality of cylinder bodies 4 They are all connected to the cylinder head body 10 and to the first opening, the water channel of the cylinder body 4 is connected to the water channel of the cylinder head body 10, and the transition plate 11 can effectively shield the two ends of the cylinder head body, thereby enhancing the overall airtightness of the cylinder head, and then can effectively prevent the flame generated by the combustion of diesel from overflowing through the cylinder head, thereby further improving the explosion-proof performance of the device, wherein the connection method between the cylinder head body 10 and the cylinder body 4 is the existing technology, and thus it is not repeated again, wherein a metal repair agent is provided in the gap between the transition plate 11 and the cylinder head body 10.

[0031] In an optional embodiment, the explosion-proof exhaust unit includes an exhaust manifold 12, the air inlet end of the exhaust manifold 12 is connected to the air outlet ends of the plurality of cylinder bodies 4 and are interconnected, the exhaust manifold (12) is connected to another transition plate (11), the exhaust manifold is provided with a first interface and a second interface, the first interface and the second interface are both provided with an exhaust flange 13 for connecting a boost valve 14 and a blind flange 15, the boost valve 14 can be effectively installed through the exhaust flange 13 provided on the first interface and the second interface to adjust the pressure when the device is used, and the blind flange 15 can also be installed, so that the first interface or the second interface can be closed according to work needs, and the exhaust manifold 12 can be effectively modified according to work needs, so that the exhaust manifold 12 can be flexibly used in different environments.

[0032] In an optional embodiment, the explosion-proof cooling component includes a water pump 16 and a cooler 17, the water pump 16 is arranged on the frame 1, the water inlet end of the boost valve 14 and the water inlet end of the water channel of the exhaust manifold 12 are both connected to the water outlet end of the water pump 16, the water outlet end of the boost valve 14 and the water outlet end of the water channel of the exhaust manifold 12 are both connected to the water inlet end of the cooler 17, the water outlet end of the cooler 17 is connected to the water inlet end of the water pump 16, the bottom end of the water pump 16 is provided with an auxiliary water outlet and a secondary water outlet, one end of the auxiliary water outlet is connected to the water channel of the exhaust manifold 12 through a connecting pipe and communicated with each other, one end of the secondary water outlet is connected to the water channel of the cylinder body 4, the water outlet end of the water channel of the cylinder head is connected to the water inlet end of the cooler 17 and communicated with each other, when in use, through the water After the water outlet of the pump 16 sends the cooling water into the boost valve 14 and the exhaust manifold 12, the cooling water is cooled and absorbs heat in the exhaust manifold 12 and the boost valve 14, and then is sent to the cooler 17 through the water channel for cooling and enters the water pump 16 again for circulation cooling. The auxiliary water outlet of the water pump 16 also sends the cooling water into the exhaust manifold 12 to further cool the exhaust manifold 12, thereby effectively improving the explosion-proof performance of the exhaust manifold 12. During the use of the water pump 16, its auxiliary water outlet sends the cooling water into the water channel of the cylinder block 4. The cooling water in the water channel of the cylinder block 4 flows into the water channel of the cylinder head body, flows out from the water channel of the cylinder head body and enters the cooler 17. After being cooled, it enters the water pump 16 for circulation. The device can also effectively cool the cylinder block 4 and the cylinder head body, further improving the explosion-proof performance of the device.

[0033] In an optional embodiment, the transmission wheel system includes a first belt 18 and a second belt 19, a crankshaft pulley 20 is provided on the cylinder body 4, a water pump fan pulley 21 is provided on the water pump 16, a generator pulley 22 is provided on the explosion-proof motor 2, two belt grooves with different inner diameters are provided on the water pump fan pulley 21, an automatic tensioning pulley 23 is provided on the frame 1, a transmission disk is coaxially rotated on the automatic tensioning pulley 23, the crankshaft pulley 20, the water pump fan pulley 21 and the automatic tensioning pulley 23 are connected by the first belt 18, the first belt 18 is located in the belt groove with a small inner diameter, the water pump fan pulley 21, the generator pulley 22 and the transmission disk are connected by the second belt 19, and the The second belt 19 is located in the belt groove with a larger inner diameter. The crankshaft pulley 20 can effectively drive the water pump fan pulley 21 to rotate through the first belt 18 and the automatic tensioner 23, and the rotation of the water pump fan pulley 21 drives the generator pulley 22 to rotate through the second belt 19. The device is transmitted through the first belt 18 and the second belt 19 respectively during the transmission process, thereby effectively reducing the load of the belt and extending the life of the belt. Belt grooves with different inner diameters are provided on the water pump fan pulley 21, thereby effectively changing the transmission ratio between the crankshaft pulley 20, the fan water pump 16 pulley and the generator pulley 22, thereby further improving the transmission efficiency of the crankshaft pulley 20, the fan water pump 16 pulley and the generator pulley 22.

[0034] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the scope of protection of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. An explosion-proof diesel engine, characterized in that: The invention comprises a frame (1), an explosion-proof power assembly, an explosion-proof motor (2) and an explosion-proof cooling assembly, wherein the explosion-proof power assembly, the explosion-proof motor (2) and the explosion-proof cooling assembly are all mounted on the frame (1), an explosion-proof starter (3) is arranged on the frame (1), the explosion-proof starter (3) is transmission-connected to the explosion-proof power assembly, and the explosion-proof power assembly, the explosion-proof motor (2) and the explosion-proof cooling assembly are transmission-connected via a transmission gear train.

2. An explosion-proof diesel engine according to claim 1, characterized in that: The explosion-proof power assembly comprises an explosion-proof air intake unit, an explosion-proof cylinder head unit, a cylinder body (4) and an explosion-proof exhaust unit; the explosion-proof starter (3) is drivingly connected to the cylinder body (4); the explosion-proof air intake unit and the explosion-proof cylinder head are both mounted on the frame (1); a plurality of the cylinder bodies (4) are mounted on the explosion-proof cylinder head unit; the explosion-proof cylinder head unit is connected to an air outlet end of the explosion-proof air intake unit and are interconnected; the explosion-proof exhaust unit is mounted on the frame (1); an air intake end of the explosion-proof exhaust unit is connected to an air outlet end of a plurality of the cylinder bodies (4) and are interconnected.

3. An explosion-proof diesel engine according to claim 2, characterized in that: The explosion-proof air intake unit comprises an air intake manifold (5) and a flame arrester (6), wherein an air intake port and an air outlet are respectively arranged at two ends of the air intake manifold (5), an eccentric transition pipe (7) is arranged at the air intake port, an elbow (8) for connecting to the flame arrester (6) is arranged at one end of the eccentric transition pipe (7) away from the air intake port, and an air intake panel (9) is arranged at the air outlet, the air intake panel (9) is connected to one end of the air intake manifold (5) provided with the air outlet, and is interconnected with the air outlet, a plurality of air outlet openings are arranged on the air intake panel (9), and the other end of the air intake panel (9) is connected to the explosion-proof cylinder head unit.

4. An explosion-proof diesel engine according to claim 3, characterized in that: The explosion-proof cylinder head unit comprises a cylinder head body (10) and a transition plate (11), wherein the cylinder head body (10) is provided with a plurality of first openings, and two transition plates (11) are respectively connected to two ends of the cylinder head body (10), wherein one transition plate (11) is connected to the air intake panel (9), and the other transition plate (11) is connected to the explosion-proof exhaust unit, and an air passage for connecting the plurality of first openings and the plurality of air outlet openings is provided on the transition plate (11), and a second opening for installing the cylinder body (4) is provided on the transition plate (11), and the plurality of cylinder bodies (4) are all connected to the cylinder head body (10) and to the first opening, and the water passage of the cylinder body (4) is connected to the water passage of the cylinder head body (10).

5. An explosion-proof diesel engine according to claim 4, characterized in that: The explosion-proof exhaust unit comprises an exhaust manifold (12), an air inlet end of the exhaust manifold (12) is connected to the air outlet ends of the plurality of cylinder bodies (4) and are in communication with each other, the exhaust manifold (12) is connected to another transition plate (11), a first interface and a second interface are provided on the exhaust manifold, and an exhaust flange (13) for connecting a boost valve (14) and a blind flange (15) is provided at the first interface and the second interface.

6. An explosion-proof diesel engine according to claim 5, characterized in that: The explosion-proof cooling component comprises a water pump (16) and a cooler (17); the water pump (16) is arranged on the frame (1); the water inlet end of the boost valve (14) and the water inlet end of the water channel of the exhaust manifold (12) are both connected to the water outlet end of the water pump (16); the water outlet end of the boost valve (14) and the water outlet end of the water channel of the exhaust manifold (12) are both connected to the water inlet end of the cooler (17); the water outlet end of the cooler (17) is connected to the water inlet end of the water pump (16); an auxiliary water outlet and a secondary water outlet are provided at the bottom end of the water pump (16); one end of the auxiliary water outlet is connected to the water channel of the exhaust manifold (12) through a connecting pipe and is in communication with each other; one end of the secondary water outlet is in communication with the water channel of the cylinder body (4); the water outlet end of the water channel of the cylinder head is connected to the water inlet end of the cooler (17) and is in communication with each other.

7. An explosion-proof diesel engine according to claim 6, characterized in that: The transmission wheel system comprises a first belt (18) and a second belt (19); a crankshaft pulley (20) is provided on the cylinder body (4); a water pump fan pulley (21) is provided on the water pump (16); a generator pulley (22) is provided on the explosion-proof motor (2); two belt grooves with different inner diameters are provided on the water pump fan pulley (21); an automatic tensioning wheel (23) is provided on the frame (1); a transmission disk is coaxially rotatably provided on the automatic tensioning wheel (23); the crankshaft pulley (20), the water pump fan pulley (21) and the automatic tensioning wheel (23) are connected by a first belt (18); the first belt (18) is located in the belt groove with a smaller inner diameter; the water pump fan pulley (21), the generator pulley (22) and the transmission disk are connected by a second belt (19); the second belt (19) is located in the belt groove with a larger inner diameter.

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