Intake mechanism of mine explosion-proof diesel engine

Abstract

This invention relates to the technical field of diesel engine intake devices, specifically to an intake mechanism for a mining explosion-proof diesel engine. The mechanism includes a diesel engine intake pipe and a connected sand discharge cup. The sand discharge cup comprises a cup-shaped body and an intake pipe. Multiple guide vanes are provided between the intake pipe and the cup-shaped body. The cup-shaped body has multiple sand discharge ports and is fitted with a hollow ring. Multiple independent impurity storage cavities are separated within the ring by partitions. The cup-shaped body also has sand discharge notches communicating with the cavities. A drive component is provided within the cup-shaped body to drive the hollow ring to rotate. During operation, the drive component rotates the hollow ring, causing the cavities to sequentially connect with the sand discharge ports to collect impurities, and then connect with the sand discharge notches to discharge sand, ensuring that the sand discharge ports are never directly connected to the outside. This device achieves airflow swirling and centrifugal dust removal through the guide vanes, and, in conjunction with the rotating hollow ring, achieves closed intermittent sand discharge. While improving the impurity separation effect, it effectively avoids airflow short-circuiting, intake backflow, and secondary dust entry, making it suitable for mining explosion-proof diesel engine operating conditions.

Description

Technical Field

[0001] This invention relates to the field of diesel engine intake device technology, specifically to an intake mechanism for a mining explosion-proof diesel engine. Background Technology

[0002] During underground operations, mining diesel engines operate in harsh environments with high dust concentrations and sand content, making it highly susceptible to sand, rock powder, and other hard particulate impurities entering the engine's air filter along with the intake airflow. These impurities not only accelerate filter element wear, clog air passages, and shorten the air filter's lifespan, but can also penetrate the filter unit and enter precision components such as cylinders and injectors, causing serious malfunctions such as component scoring and cylinder liner wear, significantly reducing the reliability and lifespan of the diesel engine. Therefore, existing technologies typically install a sand discharge cup at the front end of the diesel engine's intake manifold as a pre-treatment device. Its working principle is as follows: the sudden change in velocity and direction of the dust-laden airflow after entering the sand discharge cup causes the airflow to form a swirling flow inside the cup. Under the combined action of centrifugal force and gravity, hard impurities such as denser sand particles and rock powder are separated from the airflow and discharged from the sand discharge port opened on the side wall of the sand discharge cup. The air that has undergone preliminary dust removal and purification smoothly enters the intake manifold, effectively reducing the scouring and wear of particulate impurities on the air filter, thereby achieving pre-dust removal and protection of the intake air.

[0003] In existing sand discharge cups, to prevent external air from directly entering the intake pipe through the discharge port, causing airflow short-circuiting and disrupting internal vortex flow, the number of discharge ports is usually small and the opening size is small. However, under the high-speed operation of the diesel engine, the airflow velocity and negative pressure in the intake pipe are high, which can still easily create a suction effect at the discharge port, causing external air and sand to be drawn in from the discharge port. This not only affects the sand discharge effect but also causes secondary dust ingress, reducing the separation efficiency of the pre-filtration device. Therefore, we propose an intake mechanism for explosion-proof diesel engines used in mining. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a mining explosion-proof diesel engine intake mechanism, including a diesel engine intake pipe and a sand discharge cup connected in communication with the diesel engine intake pipe. The sand discharge cup includes a cup-shaped body and an intake pipe connected in communication with the diesel engine intake pipe. Multiple guide vanes are uniformly fixedly connected between the outer wall of the intake pipe and the inner wall of the cup-shaped body. The mechanism also includes multiple sand discharge ports uniformly opened on the cup-shaped body for discharging impurities. A hollow ring is fitted around the outside of the cup-shaped body, and multiple partitions are uniformly fixedly connected inside the hollow ring. Multiple partitions divide the interior of the hollow ring into several independent cavities for temporary storage of impurities. Multiple sand discharge notches are evenly distributed on the cup-shaped body, and the sand discharge notches are connected to the cavities for discharging sand outward. A driving component connected to the hollow ring is provided inside the cup-shaped body. During the sand discharge process, the driving component drives the hollow ring to rotate relative to the sand discharge port. At this time, the cavities sequentially connect with the sand discharge port to receive impurities and sequentially connect with the sand discharge notches to discharge sand outward, so that the sand discharge port is never directly connected to the outside.

[0005] In some embodiments, the drive component includes a mounting bracket fixedly connected inside the intake pipe, a shaft rotatably connected to the mounting bracket, a turbine blade being provided at one end of the shaft, and a circular plate being fixedly connected to the top end of the hollow ring, one end of the shaft passing through and rotatably connected to the circular plate, and a speed reduction assembly being provided between the shaft and the circular plate, the speed reduction assembly being used to drive the circular plate and the hollow ring to rotate at a speed lower than that of the shaft when the airflow drives the turbine blade to rotate.

[0006] In some embodiments, the deceleration assembly includes a gear disk one fixedly connected to a shaft one, a shaft two rotatably connected to the cup-shaped body, a gear disk two fixedly connected to the shaft two and meshing with the gear disk one, a gear disk three fixedly connected to the shaft two, and a hollow column rotatably connected to the shaft one, a gear disk four fixedly connected to the hollow column and meshing with the gear disk three, and the hollow column being connected to a circular plate; The fourth toothed disc has the same structure as the second toothed disc, and the first toothed disc has the same structure as the third toothed disc, with the diameter of the second toothed disc being larger than that of the first toothed disc.

[0007] In some embodiments, a cylindrical groove is formed on the circular plate, one end of the hollow column is located in the cylindrical groove, and a torsion spring is sleeved on the hollow column. The two ends of the torsion spring are respectively fixed to the hollow column and the inner wall of the cylindrical groove. A temporary locking member is provided between the circular plate and the cup-shaped body. The temporary locking member is used to temporarily lock the circular plate and restrict its rotation. When the hollow column rotates and causes the torsion spring to be twisted to a certain angle, the temporary locking member releases the lock on the circular plate, and the torsion spring drives the circular plate to rotate a certain distance through the reset action.

[0008] In some embodiments, the temporary locking member includes a cylinder fixedly connected to the cup-shaped body, the cylinder having a groove, a locking pin slidably connected in the groove, a spring fixedly connected between one end of the locking pin and the inner wall of the groove, and the locking pin having an arc-shaped design, and a plurality of slots evenly provided on the circular plate, and when one end of the locking pin is located in the slot, the partition is away from the sand discharge port.

[0009] In some embodiments, a sand discharge groove is provided on the side wall of the air intake pipe.

[0010] In some embodiments, a slide plate is rotatably connected to one side of the turbine blade, one end of the shaft slides through the slide plate, a connecting rod is fixedly connected to the slide plate, one end of the connecting rod is fixedly connected to an arc-shaped sealing plate that slides through the inner wall of the intake pipe, and a guide rod is fixedly connected to the mounting bracket, one end of the guide rod slides through the connecting rod; Spring 2 is sleeved on the shaft 1. The two ends of spring 2 contact and abut against the slide plate and the mounting bracket respectively. A limiting groove is opened on the shaft 1. A sliding protrusion is fixedly connected to the turbine fan blade. One end of the sliding protrusion is located in the limiting groove and is slidably connected to its inner wall.

[0011] This invention has at least the following beneficial effects: This device uses a sand discharge cup with guide vanes and a rotatable hollow ring structure at the air inlet to achieve spiral guidance and centrifugal separation of the airflow. It can efficiently separate impurities such as sand and coal dust mixed in the air. At the same time, the hollow ring is driven to rotate by the drive component, so that the internal independent cavities are connected to the sand discharge port in sequence to receive impurities, and then the sand is discharged outward through the sand discharge gap. Throughout the process, it is ensured that the sand discharge port is never directly connected to the outside, thereby improving the impurity removal effect and reducing the probability of secondary impurity entry. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Another structural diagram; Figure 3 For the present invention Figure 2 Schematic diagram of partial cross-section; Figure 4 For the present invention Figure 3 Explosion structure diagram; Figure 5 For the present invention Figure 3 Schematic diagram of partial cross-section; Figure 6 For the present invention Figure 5 Schematic diagram of partial cross-section; Figure 7 For the present invention Figure 6 Schematic diagram of the structure of area A in the middle; Figure 8 For the present invention Figure 6 Another structural diagram; Figure 9 For the present invention Figure 8 Schematic diagram of partial cross-section; Figure 10 For the present invention Figure 9 Another structural diagram; Figure 11 This is a schematic diagram of the hollow ring structure of the present invention.

[0013] In the diagram: 1. Diesel engine intake pipe; 11. Sand discharge cup; 12. Cup-shaped body; 13. Intake pipe; 14. Guide vane; 2. Sand discharge port; 3. Hollow ring; 4. Baffle plate; 5. Sand discharge notch; 6. Drive component; 61. Mounting bracket; 62. Shaft 1; 63. Turbine fan blade; 64. Circular plate; 65. Reduction assembly; 66. Gear 1; 67. Shaft 2; 68. Gear 2; 69. Gear 3; 71. Hollow column; 72. Gear 4; 73. Columnar groove; 74. Torsion spring; 75. Temporary locking component; 76. Cylinder; 77. Slide groove; 78. Locking pin; 79. Spring 1; 81. Slot; 82. Sand discharge groove; 83. Slide plate; 84. Arc-shaped sealing plate; 85. Guide rod; 86. Spring 2; 87. Limiting groove; 88. Sliding protrusion; 89. Connecting rod. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figures 1-11This invention provides a technical solution: a mining explosion-proof diesel engine intake mechanism, including a diesel engine intake pipe 1 and a sand discharge cup 11 connected to the diesel engine intake pipe 1. The sand discharge cup 11 includes a cup-shaped body 12 and an intake pipe 13 connected to the diesel engine intake pipe 1. Multiple guide vanes 14 are uniformly fixedly connected between the outer wall of the intake pipe 13 and the inner wall of the cup-shaped body 12. It also includes multiple sand discharge ports 2 uniformly opened on the cup-shaped body 12 for discharging impurities. A hollow ring 3 is sleeved on the outside of the cup-shaped body 12, and multiple partitions 4 are uniformly fixedly connected inside the hollow ring 3. One side of the multiple partitions 4 is connected to the cup-shaped body 12. The outer walls are in contact with each other and slide to connect with the outer wall of the cup-shaped body 12. Multiple partitions 4 divide the interior of the hollow ring 3 into multiple independent cavities for temporary storage of impurities. Multiple sand discharge gaps 5 are evenly provided on the cup-shaped body 12. The sand discharge gaps 5 are connected to the cavities and are used to discharge sand outward. A driving component 6 connected to the hollow ring 3 is provided inside the cup-shaped body 12. During the sand discharge process at the sand discharge port 2, the driving component 6 drives the hollow ring 3 to rotate relative to the sand discharge port 2. At this time, the cavities are connected to the sand discharge port 2 in sequence to receive impurities and are connected to the sand discharge gaps 5 in sequence to discharge sand outward, so that the sand discharge port 2 is never directly connected to the outside.

[0016] Specifically, this device operates in two modes depending on the diesel engine's running state. The first mode is as follows: When the diesel engine is idling or running at low speed, the intake air volume is small, and the airflow velocity through the intake pipe 1 and intake manifold 13 is low. The swirling speed formed after the airflow passes through the guide vanes 14 inside the sand discharge cup 11 is slow, resulting in insufficient centrifugal force on impurities in the airflow and a weak impurity removal effect. Some impurities may still enter the intake manifold 13 with the airflow. At this time, due to the low airflow velocity, the turbine blades 63 cannot continuously rotate to overcome the locking force of the locking pin 78 on the circular plate 64. Consequently, because the turbine blades 63 do not rotate continuously, the airflow through the intake manifold 13 will flow along the turbine blades 63, still forming a certain swirling flow. This allows residual impurities in the airflow to be discharged back to the outside of the intake manifold 13 through the sand discharge groove 82 under centrifugal force, thereby further reducing the impurity content entering the diesel engine's intake manifold 1 and improving the intake purification effect under low-speed conditions.

[0017] The second operating mode is as follows: When the diesel engine speed reaches the set threshold or is in a high-speed operating state, the intake volume increases significantly, and the airflow velocity through the diesel engine intake pipe 1 and intake pipe 13 increases dramatically. At this time, the high-speed airflow can not only drive the turbine blade 63 to rotate continuously, but also overcome the resistance of the second spring 86 to push the turbine blade 63 to move axially relative to the first shaft 62, thereby driving the slide plate 83 and the arc-shaped sealing plate 84 connected to the slide plate 83 to move synchronously, thereby sealing the sand discharge groove 82 on the intake pipe 13, effectively avoiding the problem that a large amount of impurity airflow from the outside is directly sucked into the intake pipe 13 from the sand discharge groove 82 due to excessive negative pressure in the intake pipe 13. At the same time, the turbine blade 63 drives the first shaft 62 to rotate continuously, and the rotation of the first shaft 62 drives the gear disk 66 fixed to it to rotate synchronously. The gear disk 66 meshes and drives the gear disk 68 fixed to the second shaft 67 to rotate, thereby driving the gear disk 69 and the gear disk 72 to rotate in conjunction through the gear disk 68, and finally driving the hollow column 71 to rotate. During the rotation of the hollow column 71, if one end of the locking pin 78 is engaged in the slot 81 on the circular plate 64, the rotation of the hollow column 71 will first cause the torsion spring 74 to twist and store force. When the torsion spring 74 reaches the set level of force, the elastic force it generates can overcome the locking force between the locking pin 78 and the slot 81. Then, through the reset action of the torsion spring 74, the circular plate 64 is rotated until the locking pin 78 is engaged in the next slot 81. During this process, the partition 4, which is fixedly connected to the circular plate 64, will quickly pass over the sand discharge port 2 on the cup-shaped body 12, greatly shortening the time that the partition 4 blocks the sand discharge port 2, thereby reducing the situation where impurities are bounced back into the suction pipe 13 after hitting the partition 4, ensuring the impurity removal efficiency under high-speed conditions.

[0018] In summary, this device, by setting a sand discharge cup 11 with guide vanes 14 and a rotatable hollow ring 3 structure at the air inlet, utilizes the guide vanes 14 to achieve spiral guidance and centrifugal separation of the airflow, which can efficiently separate impurities such as sand and coal dust mixed in the air. At the same time, the hollow ring 3 is driven to rotate by the drive component 6, so that the internal independent cavities are connected to the sand discharge port 2 in sequence to receive impurities, and then the sand is discharged outward through the sand discharge notch 5. Throughout the process, it is ensured that the sand discharge port 2 is never directly connected to the outside, thereby improving the impurity removal effect and reducing the probability of secondary impurity entry.

[0019] The drive unit 6 includes a mounting bracket 61 fixedly connected inside the intake pipe 13. A shaft 62 is rotatably connected to the mounting bracket 61. A turbine blade 63 is provided at one end of the shaft 62, and a circular plate 64 is fixedly connected to the top of the hollow ring 3. One end of the shaft 62 passes through the circular plate 64 and is rotatably connected to it. A speed reduction assembly 65 is provided between the shaft 62 and the circular plate 64. The speed reduction assembly 65 is used to drive the circular plate 64 and the hollow ring 3 to rotate at a speed lower than that of the shaft 62 when the airflow drives the turbine blade 63 to rotate.

[0020] The reduction assembly 65 includes a gear disk 66 fixedly connected to a shaft 62, a shaft 67 rotatably connected to a cup-shaped body 12, a gear disk 68 fixedly connected to the shaft 67 and meshing with the gear disk 66, a gear disk 69 fixedly connected to the shaft 67, a hollow column 71 rotatably connected to the shaft 62, a gear disk 72 fixedly connected to the hollow column 71 and meshing with the gear disk 69, and the hollow column 71 connected to a circular plate 64. When the airflow drives the turbine fan blade 63 to rotate, it will drive the shaft 62 to rotate, thereby driving the gear disk 66 to rotate, which in turn drives the gear disk 68 to rotate. When the gear disk 68 rotates, it will drive the shaft 67 to rotate, thereby driving the gear disk 69 to rotate, which in turn drives the hollow column 71 to rotate through the gear disk 72. Gear 4 72 has the same structure as gear 2 68, and gear 1 66 has the same structure as gear 3 69. The diameter of gear 2 68 is larger than that of gear 1 66. Through this gear transmission ratio design, when shaft 1 62 rotates, hollow column 71 can achieve a significant reduction in speed relative to shaft 1 62, thereby effectively improving the output torque and driving force of hollow column 71 and ensuring stable and reliable operation of the device under low speed and high torque conditions.

[0021] A cylindrical groove 73 is provided on the circular plate 64. One end of the hollow column 71 is located in the cylindrical groove 73, and a torsion spring 74 is sleeved on the hollow column 71. The two ends of the torsion spring 74 are fixedly connected to the hollow column 71 and the inner wall of the cylindrical groove 73, respectively. A temporary locking member 75 is provided between the circular plate 64 and the cup-shaped body 12. The temporary locking member 75 is used to temporarily lock the circular plate 64 and restrict its rotation. When the hollow column 71 rotates and causes the torsion spring 74 to be twisted to a certain angle, the temporary locking member 75 releases the lock on the circular plate 64. The torsion spring 74 drives the circular plate 64 to rotate a certain distance through the reset action.

[0022] The temporary locking component 75 includes a cylinder 76 fixedly connected to the cup-shaped body 12. A groove 77 is provided on the cylinder 76, and a locking pin 78 is slidably connected in the groove 77. A spring 79 is fixedly connected between one end of the locking pin 78 and the inner wall of the groove 77. The locking pin 78 has an arc-shaped design. Multiple slots 81 are evenly provided on the circular plate 64. When one end of the locking pin 78 is inserted into the slot 81, the partition 4 in the hollow ring 3 is in a position away from the sand discharge port 2. At this time, the hollow cylinder 71 continues to rotate, which will drive the torsion spring 74 to gradually twist and store force. When the torque of the torsion spring 74 reaches the set value, its driving force on the circular plate 64 can overcome the locking force between the locking pin 78 and the slot 81, push the locking pin 78 out of the slot 81 and unlock it. Then, under the action of the return spring force of the torsion spring 74, the circular plate 64 is pushed to quickly rotate through a certain angle. During this process, the partition 4 quickly passes the sand discharge port 2, completing one intermittent rotation action.

[0023] A sand discharge groove 82 is provided on the side wall of the intake pipe 13 to discharge impurities separated in the airflow after being guided by the turbine fan blade 63 to the outside of the intake pipe 13.

[0024] A slide plate 83 is rotatably connected to one side of the turbine blade 63. One end of the shaft 62 slides through the slide plate 83. A connecting rod 89 is fixedly connected to the slide plate 83. One end of the connecting rod 89 is fixedly connected to an arc-shaped sealing plate 84 that slides through the inner wall of the intake pipe 13. A guide rod 85 is fixedly connected to the mounting bracket 61. One end of the guide rod 85 slides through the connecting rod 89 to guide and limit the movement of the slide plate 83. A second spring 86 is fitted on the shaft 62. The two ends of the second spring 86 contact and abut against the slide plate 83 and the mounting bracket 61 respectively. A limit groove 87 is opened on the shaft 62. A sliding protrusion 88 is fixedly connected to the turbine fan blade 63. One end of the sliding protrusion 88 is located in the limit groove 87 and is slidably connected to its inner wall. Specifically, when spring 2 86 is in its initial state, the arc-shaped sealing plate 84 is away from the sand discharge trough 82, keeping the sand discharge trough 82 open. When the diesel engine is running at high speed, the intake airflow will not only drive the turbine fan blade 63 to rotate continuously, but also drive it to generate axial displacement along shaft 1 62, thereby driving the sliding plate 83 to move synchronously along shaft 1 62, so that the arc-shaped sealing plate 84 completely seals the sand discharge trough 82. During this process, spring 2 86 is compressed and contracts, providing elastic restoring force for subsequent reset.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A mining explosion-proof diesel engine intake mechanism, comprising a diesel engine intake pipe (1) and a sand discharge cup (11) connected in communication with the diesel engine intake pipe (1), wherein the sand discharge cup (11) comprises a cup-shaped body (12) and an intake pipe (13) connected in communication with the diesel engine intake pipe (1), wherein a plurality of guide vanes (14) are uniformly fixedly connected between the outer wall of the intake pipe (13) and the inner wall of the cup-shaped body (12), characterized in that, It also includes: Multiple sand discharge ports (2) are evenly distributed on the cup-shaped body (12) for discharging impurities; Hollow ring (3) is fitted on the outside of cup-shaped body (12), and multiple partitions (4) are evenly fixedly connected inside hollow ring (3). The multiple partitions (4) divide the interior of hollow ring (3) into multiple independent cavities for temporary storage of impurities. Multiple sand discharge gaps (5) are evenly opened on the cup-shaped body (12) and connected to the cavity for discharging sand outward; The driving component (6) is set inside the cup-shaped body (12) and connected to the hollow ring (3). During the sand discharge process at the sand discharge port (2), the driving component (6) drives the hollow ring (3) to rotate relative to the sand discharge port (2). At this time, the cavity connects with the sand discharge port (2) in sequence to receive impurities, and connects with the sand discharge gap (5) in sequence to discharge sand outward, so that the sand discharge port (2) is never directly connected to the outside.

2. The intake mechanism for an explosion-proof diesel engine used in mining according to claim 1, characterized in that: The drive component (6) includes a mounting bracket (61) fixedly connected inside the intake pipe (13). A shaft (62) is rotatably connected to the mounting bracket (61). A turbine blade (63) is provided at one end of the shaft (62), and a circular plate (64) is fixedly connected to the top of the hollow ring (3). One end of the shaft (62) passes through the circular plate (64) and is rotatably connected to it. A speed reduction assembly (65) is provided between the shaft (62) and the circular plate (64). The speed reduction assembly (65) is used to drive the circular plate (64) and the hollow ring (3) to rotate at a speed lower than that of the shaft (62) when the airflow drives the turbine blade (63) to rotate.

3. The intake mechanism for an explosion-proof diesel engine used in mining according to claim 2, characterized in that: The deceleration assembly (65) includes a gear disk (66) fixedly connected to a shaft (62), a shaft (67) rotatably connected to the cup-shaped body (12), a gear disk (68) fixedly connected to the shaft (67) and meshing with the gear disk (66), a gear disk (69) fixedly connected to the shaft (67), and a hollow column (71) rotatably connected to the shaft (62), a gear disk (72) fixedly connected to the hollow column (71) and meshing with the gear disk (69), and the hollow column (71) is connected to a circular plate (64); The fourth toothed disc (72) has the same structure as the second toothed disc (68), and the first toothed disc (66) has the same structure as the third toothed disc (69). The diameter of the second toothed disc (68) is larger than that of the first toothed disc (66).

4. The intake mechanism for an explosion-proof diesel engine used in mining according to claim 3, characterized in that: The circular plate (64) has a cylindrical groove (73) and one end of the hollow column (71) is located in the cylindrical groove (73). A torsion spring (74) is sleeved on the hollow column (71). The two ends of the torsion spring (74) are fixed to the hollow column (71) and the inner wall of the cylindrical groove (73) respectively. A temporary locking member (75) is provided between the circular plate (64) and the cup-shaped body (12). The temporary locking member (75) is used to temporarily lock the circular plate (64) and restrict its rotation. When the hollow column (71) rotates and drives the torsion spring (74) to be twisted to a certain angle, the temporary locking member (75) releases the lock on the circular plate (64). The torsion spring (74) drives the circular plate (64) to rotate a certain distance through the reset action.

5. The intake mechanism for a mining explosion-proof diesel engine according to claim 4, characterized in that: The temporary locking component (75) includes a cylinder (76) fixedly connected to the cup-shaped body (12). A groove (77) is provided on the cylinder (76). A locking pin (78) is slidably connected in the groove (77). A spring (79) is fixedly connected between one end of the locking pin (78) and the inner wall of the groove (77). One end of the locking pin (78) adopts an arc design. Multiple slots (81) are evenly provided on the circular plate (64). When one end of the locking pin (78) is located in the slot (81), the partition (4) is away from the sand discharge port (2).

6. The intake mechanism for an explosion-proof diesel engine for mining as described in claim 5, characterized in that: A sand discharge groove (82) is provided on the side wall of the air intake pipe (13).

7. The intake mechanism for a mining explosion-proof diesel engine according to claim 6, characterized in that: A slide plate (83) is rotatably connected to one side of the turbine blade (63). One end of the shaft (62) slides through the slide plate (83). A connecting rod (89) is fixedly connected to the slide plate (83). One end of the connecting rod (89) is fixedly connected to an arc-shaped sealing plate (84) that slides through the inner wall of the intake pipe (13). A guide rod (85) is fixedly connected to the mounting bracket (61). One end of the guide rod (85) slides through the connecting rod (89). Spring 2 (86) is sleeved on the shaft 1 (62). The two ends of spring 2 (86) contact and abut against the slide plate (83) and the mounting bracket (61) respectively. A limiting groove (87) is opened on the shaft 1 (62). A sliding protrusion (88) is fixedly connected on the turbine fan blade (63). One end of the sliding protrusion (88) is located in the limiting groove (87) and is slidably connected to its inner wall.

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