Mining ball mill with concentrated ore feeding device

Abstract

The invention provides a mining ball mill with a concentrated ore feeding device, and relates to the field of ball mills, the mining ball mill comprises two supporting frames, and the two supporting frames are both fixedly connected to the upper end face of a bottom frame; the barrel is rotationally connected to the upper ends of the two supporting frames; the driving assembly is fixedly installed on the upper end face of the front end of the bottom frame, and the driving assembly and the barrel are fixedly installed. The feeding hopper is fixedly connected to the upper end face of the rear end of the bottom frame. The feeding transmission assembly is fixedly installed on the upper end face of the feeding hopper. The side frame is fixedly connected to the right end face of the bottom frame. The detection mechanism is arranged at the upper end of the side frame, and the problems that in a barrel of an existing ball mill, lining plates are usually arranged to protect the barrel, when the lining plates are installed, workers usually need to enter the barrel to fix the lining plates one by one through bolts, operation is tedious, and the working efficiency is not high enough are solved. Through the arrangement, the lining plate is convenient to mount and replace, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ball mills, in particular to a mining ball mill with a concentrated ore feeding device. Background Art

[0002] Ball mill is one of the high-fine grinding machines widely used in industrial production. It is mainly used to crush and grind materials. The ball mill mainly relies on the grinding media in the cylinder, such as steel balls or ceramic balls, to impact and grind the materials, and the feeding device is a device used to feed the ball mill. When the ball mill is in use, it usually rotates the cylinder to make the grinding media be thrown up and thrown out along the axis of the cylinder under the action of centrifuge to crush and grind the materials.

[0003] However, the existing ball mill cylinder is usually provided with a liner to protect the cylinder. When installing the liner, workers are usually required to enter the cylinder and use bolts to fix the liner one by one. The operation is cumbersome and the work efficiency is not high enough. Summary of the invention

[0004] In view of this, the present invention provides a mining ball mill with a concentrated ore feeding device, which has the advantages of improving installation efficiency, reducing labor intensity, improving crushing efficiency, and increasing output.

[0005] The present invention provides a mining ball mill with a concentrated ore feeding device, which specifically includes: a base frame, a support frame, a cylinder, a driving assembly, a feeding hopper, a feeding transmission assembly, a side frame, a mounting mechanism and a detection mechanism; two support frames are provided, and the two support frames are fixedly connected to the upper end surface of the base frame; the cylinder is rotatably connected to the upper ends of the two support frames; the driving assembly is fixedly installed on the upper end surface of the front end of the base frame, and the driving assembly is fixedly installed on the cylinder; the feeding hopper is fixedly connected to the upper end surface of the rear end of the base frame; the feeding transmission assembly is fixedly installed on the upper end surface of the feeding hopper; the side frame is fixedly connected to the right end surface of the base frame; the mounting mechanism is arranged on the inner side of the cylinder; and the detection mechanism is arranged on the upper end of the side frame.

[0006] Furthermore, the mounting mechanism includes: a mounting groove, a lining plate and a fixed slider; the mounting groove is provided in plurality, and the plurality of mounting grooves are all opened on the inner side of the cylinder; the lining plate is provided in plurality, and the plurality of lining plates are all slidably connected to the inner side of the cylinder; the fixed slider is provided in plurality, and the plurality of fixed sliders are respectively fixedly connected to the outer sides of the plurality of lining plates, and the plurality of fixed sliders are respectively slidably connected to the inner sides of the mounting grooves.

[0007] Furthermore, the mounting mechanism also includes: mounting plates and mounting springs; the mounting plates are provided in multiple groups, and the multiple groups of mounting plates are respectively slidably connected to the inner sides of multiple lining plates; the mounting springs are provided in multiple groups, and the multiple groups of mounting springs are respectively fixedly connected to the inner sides of the multiple groups of mounting plates.

[0008] Furthermore, the installation mechanism also includes: inclined grooves, pressing blocks and fixing pins; the inclined grooves are provided in multiple groups, and the multiple groups of inclined grooves are respectively opened on the inner sides of the multiple groups of mounting plates; the pressing blocks are provided in multiple groups, and the multiple groups of pressing blocks are respectively slidably connected to the inner sides of the multiple lining plates; the fixing pins are provided in multiple groups, and the multiple groups of fixing pins are respectively fixedly connected to the lower end surfaces of the multiple groups of pressing blocks, and the multiple groups of fixing pins are respectively slidably connected to the inner sides of the multiple groups of inclined grooves.

[0009] Furthermore, the detection mechanism includes: a fixing ring and a driving gear; the fixing ring is fixedly connected to the outer side of the cylinder; the driving gear is rotatably connected to the upper end of the side frame, and the driving gear is meshed with the fixing ring.

[0010] Furthermore, the detection mechanism also includes: a fixed gear and a connecting gear; the fixed gear is rotatably connected to the upper end of the side frame, and the fixed gear is fixedly connected to the driving gear; the connecting gear is rotatably connected to the upper end of the side frame, and the connecting gear is meshed with the fixed gear.

[0011] Furthermore, the detection mechanism also includes: a fixed shell, a turntable, a sliding block and a tension spring; the fixed shell is fixedly connected to the upper end surface of the side frame; the turntable is rotatably connected to the inner side of the fixed shell, and the turntable is fixedly connected to the connecting gear; there are two sliding blocks, and both sliding blocks are slidably connected to the inner side of the turntable; there are two tension springs, one end of the two tension springs is respectively fixedly connected to the outer sides of the two sliding blocks, and the other ends of the two tension springs are fixedly connected to the inner side of the turntable.

[0012] Furthermore, the detection mechanism also includes: a pressing slider, a sliding ring, a fixed shaft and a reset spring; the pressing slider is provided with two groups, and the two groups of pressing sliders are both slidably connected to the inner side of the turntable; the sliding ring is provided with two groups, and the two sliding rings are both slidably connected to the inner side of the fixed shell; the fixed shaft is provided with two groups, and the two groups of fixed shafts are respectively fixedly connected to the outer sides of the two sliding rings; the reset spring is provided with two groups, one end of the two groups of reset springs are respectively fixedly connected to the outer sides of the two sliding rings, and the other ends of the two groups of reset springs are fixedly connected to the inner side of the fixed shell.

[0013] Furthermore, the detection mechanism also includes: a warning light, a fixed bracket and a push switch; the warning lights are provided with two, the two warning lights are fixedly installed with each other, the two warning lights are installed on the upper end surface of the fixed shell, and the two warning lights are electrically connected to the power supply; the fixed brackets are provided with two, the two fixed brackets are fixedly connected to the outside of the fixed shell; the push switches are provided with two, the two push switches are respectively fixedly installed on the inner sides of the two fixed brackets, and the two push switches are respectively electrically connected in the connection lines between the two warning lights and the power supply.

[0014] Beneficial Effects

[0015] The present invention realizes the installation and replacement of the lining plate through the arrangement of the installation mechanism. When the lining plate is installed, the fixed slider can be slidably connected to the inner side of the installation groove, and the installation plate will slide on the inner side of the installation groove under the action of the installation spring to limit the lining plate. When a single lining plate needs to be replaced, the pressing block can be pushed inwardly to make the installation plate slide toward the inner side of the fixed slider under the action of the inclined groove and the fixing pin. At this time, the installation plate will be separated from the installation groove, and the lining plate can be taken out upward for replacement. The installation is convenient and the work efficiency is improved. When a single lining plate needs to be replaced, the pressing block can be pushed inwardly to make the installation plate slide toward the inner side of the fixed slider under the action of the inclined groove and the fixing pin. At this time, the installation plate will be separated from the installation groove, and the lining plate can be taken out upward for replacement. The operation is simple, the work efficiency is improved, and the labor intensity is reduced.

[0016] In addition, the detection of the rotation speed of the cylinder is realized through the setting of the detection mechanism. When the driving assembly drives the cylinder, the cylinder will drive the fixed ring to rotate. The rotation of the fixed ring will drive the fixed gear to rotate under the action of meshing with the driving gear. Through the meshing of the connecting gear and the fixed gear, the rotation of the fixed gear will drive the turntable to rotate. When the turntable rotates, the two sliding blocks will slide outward under the action of centrifugal force, so that the sliding blocks will be separated from the pressing sliders and will not contact the two sets of pressing sliders. At this time, it means that the rotation speed of the cylinder is appropriate and the mineral materials can be ground and crushed to the greatest extent. When the rotation speed of the cylinder is too slow, the rotation speed of the turntable will decrease. At the same time, the centrifugal force on the sliding block will decrease. At this time, the sliding block will It will slide toward the center of the turntable and press the pressing slider near the center of the turntable. The pressing slider will press the pressing switch at the lower end through the sliding ring and the fixed shaft. At this time, the warning light at the lower end will light up, reminding the staff that the speed is too low. When the cylinder rotates too fast, the centrifugal force on the sliding block will increase. At this time, the sliding block will slide to the outside of the turntable, squeezing the pressing slider away from the center of the turntable. At this time, the pressing slider will press the pressing switch at the upper end through the sliding ring and the fixed shaft. At this time, the warning light at the upper end will light up, reminding the staff that the speed is too high and timely adjustment is made to improve the crushing and grinding efficiency and increase the output. The detection mechanism is a mechanical structure with high strength and not easy to be damaged, which prolongs the service life and reduces the cost of use.

[0017] In addition, through the setting of the above-mentioned mechanism, the installation and replacement of the liner is realized. By sliding the fixed slider to the inner side of the installation groove, the mounting plate limits the liner under the action of the mounting spring, which facilitates the installation of the liner, improves work efficiency, reduces labor intensity, and realizes the detection of the cylinder rotation speed. Through the detection of the cylinder rotation speed, the warning light gives a corresponding prompt, so that the staff can adjust the cylinder rotation speed in time, thereby improving the crushing and grinding efficiency and increasing the output. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic structural diagram of the main body of the first embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the liner plate of the first embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a mounting plate according to the first embodiment of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the split pressing block of the first embodiment of the present invention.

[0025] Figure 5 It is a schematic structural diagram of a driving gear according to a second embodiment of the present invention.

[0026] Figure 6 It is a schematic structural diagram of a cross-section of a fixed shell of the second embodiment of the present invention.

[0027] Figure 7 It is a schematic structural diagram of a sliding ring according to the second embodiment of the present invention.

[0028] Figure 8 The second embodiment of the present invention Figure 1 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0029] Fig. 9 The second embodiment of the present invention Figure 6 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0030] Reference numerals list

[0031] 1. Base frame; 2. Support frame; 3. Cylinder; 301. Mounting slot; 4. Drive assembly; 5. Feed hopper; 6. Feed transmission assembly; 7. Side frame; 8. Lining plate; 801. Fixed slider; 9. Mounting plate; 901. Inclined slot; 10. Mounting spring; 11. Pressing block; 1101. Fixed pin; 12. Fixed ring; 13. Driving gear; 14. Fixed gear; 15. Connecting gear; 16. Fixed housing; 17. Turntable; 18. Sliding block; 19. Tension spring; 20. Pressing slider; 21. Sliding ring; 2101. Fixed shaft; 2102. Reset spring; 22. Warning light; 23. Fixed bracket; 24. Press switch. DETAILED DESCRIPTION

[0032] Embodiment 1:

[0033] Please refer to Figure 1-Figure 4 As shown:

[0034] The present invention provides a mining ball mill with a concentrated ore feeding device, comprising a base frame 1, a support frame 2, a cylinder 3, a driving assembly 4, a feeding hopper 5, a feeding transmission assembly 6, a side frame 7, a mounting mechanism and a detection mechanism; two support frames 2 are provided, and the two support frames 2 are fixedly connected to the upper end surface of the base frame 1; the cylinder 3 is rotatably connected to the upper ends of the two support frames 2; the driving assembly 4 is fixedly installed on the upper end surface of the front end of the base frame 1, and the driving assembly 4 is fixedly installed on the cylinder 3; the feeding hopper 5 is fixedly connected to the upper end surface of the rear end of the base frame 1; the feeding transmission assembly 6 is fixedly installed on the upper end surface of the feeding hopper 5; the side frame 7 is fixedly connected to the right end surface of the base frame 1; the mounting mechanism is arranged on the inner side of the cylinder 3; and the detection mechanism is arranged on the upper end of the side frame 7.

[0035] The mounting mechanism includes: a mounting groove 301, a lining plate 8, a fixed slider 801, a mounting plate 9, an inclined groove 901, a mounting spring 10, a pressing block 11 and a fixing pin 1101; there are multiple mounting grooves 301, and the multiple mounting grooves 301 are all opened on the inner side of the cylinder 3; there are multiple lining plates 8, and the multiple lining plates 8 are all slidably connected to the inner side of the cylinder 3; there are multiple fixed sliders 801, and the multiple fixed sliders 801 are respectively fixedly connected to the outer sides of the multiple lining plates 8, and the multiple fixed sliders 801 are respectively slidably connected to the inner sides of the mounting grooves 301; the mounting plate 9 is provided with multiple groups, Multiple groups of mounting plates 9 are respectively slidably connected to the inner sides of multiple lining plates 8; multiple groups of inclined grooves 901 are provided, and multiple groups of inclined grooves 901 are respectively opened on the inner sides of multiple groups of mounting plates 9; multiple groups of mounting springs 10 are provided, and multiple groups of mounting springs 10 are respectively fixedly connected to the inner sides of multiple groups of mounting plates 9; multiple groups of pressing blocks 11 are provided, and multiple groups of pressing blocks 11 are respectively slidably connected to the inner sides of multiple lining plates 8; multiple groups of fixing pins 1101 are provided, and multiple groups of fixing pins 1101 are respectively fixedly connected to the lower end surfaces of multiple groups of pressing blocks 11, and multiple groups of fixing pins 1101 are respectively slidably connected to the inner sides of multiple groups of inclined grooves 901.

[0036] Specific usage and function of this embodiment: When installing the lining plate 8, the fixed slider 801 can be slidably connected to the inner side of the installation groove 301, and the installation plate 9 will slide on the inner side of the installation groove 301 under the action of the installation spring 10 to limit the lining plate 8. When a single lining plate 8 needs to be replaced, the pressing block 11 can be pushed inward to make the installation plate 9 slide toward the inner side of the fixed slider 801 under the action of the inclined groove 901 and the fixing pin 1101. At this time, the installation plate 9 will be separated from the installation groove 301, and the lining plate 8 can be taken out upward for replacement.

[0037] Embodiment 2:

[0038] On the basis of the first embodiment, Figure 5-Figure 9 As shown, the detection mechanism includes: a fixed ring 12, a driving gear 13, a fixed gear 14, a connecting gear 15, a fixed shell 16, a rotating disk 17, a sliding block 18, a tension spring 19, a pressing slider 20, a sliding ring 21, a fixed shaft 2101, a reset spring 2102, a warning light 22, a fixed bracket 23 and a pressing switch 24; the fixed ring 12 is fixedly connected to the outer side of the cylinder 3; the driving gear 13 is rotatably connected to the upper end of the side frame 7, and the driving gear 13 is meshed with the fixed ring 12; the fixed gear 14 is rotatably connected to the upper end of the side frame 7, The fixed gear 14 is fixedly connected to the driving gear 13; the connecting gear 15 is rotatably connected to the upper end of the side frame 7, and the connecting gear 15 is meshed with the fixed gear 14; the fixed housing 16 is fixedly connected to the upper end surface of the side frame 7; the turntable 17 is rotatably connected to the inner side of the fixed housing 16, and the turntable 17 is fixedly connected to the connecting gear 15; there are two sliding blocks 18, and the two sliding blocks 18 are slidably connected to the inner side of the turntable 17; there are two tension springs 19, one end of the two tension springs 19 is fixedly connected to the outer side of the two sliding blocks 18, and the two tension springs The other ends of the springs 19 are fixedly connected to the inner side of the rotating disk 17; there are two groups of pressing sliders 20, and the two groups of pressing sliders 20 are slidably connected to the inner side of the rotating disk 17; there are two sliding rings 21, and the two sliding rings 21 are slidably connected to the inner side of the fixed housing 16; there are two groups of fixed shafts 2101, and the two groups of fixed shafts 2101 are respectively fixedly connected to the outer sides of the two sliding rings 21; there are two groups of return springs 2102, one end of the two groups of return springs 2102 is respectively fixedly connected to the outer sides of the two sliding rings 21, and the other ends of the two groups of return springs 2102 are respectively fixedly connected to the outer sides of the two sliding rings 21. Both are fixedly connected to the inner side of the fixed shell 16; there are two warning lights 22, which are fixedly installed with each other, and the two warning lights 22 are installed on the upper end surface of the fixed shell 16, and the two warning lights 22 are electrically connected to the power supply; there are two fixed brackets 23, and the two fixed brackets 23 are fixedly connected to the outer side of the fixed shell 16; there are two push switches 24, which are respectively fixedly installed on the inner sides of the two fixed brackets 23, and the two push switches 24 are respectively electrically connected to the connection lines between the two warning lights 22 and the power supply.

[0039] The specific usage and function of this embodiment are as follows: when the driving assembly 4 drives the cylinder 3, the cylinder 3 will drive the fixed ring 12 to rotate. The rotation of the fixed ring 12 will drive the fixed gear 14 to rotate under the action of meshing with the driving gear 13. Through the meshing of the connecting gear 15 and the fixed gear 14, the rotation of the fixed gear 14 will drive the turntable 17 to rotate. When the turntable 17 rotates, the two sliding blocks 18 will slide outward under the action of centrifugal force, so that the sliding blocks 18 are separated from the pressing sliders 20 and do not contact the two groups of pressing sliders 20. At this time, it means that the rotation speed of the cylinder 3 is appropriate, and the mineral material can be ground and crushed to the greatest extent. When the rotation speed of the cylinder 3 is too slow, the rotation speed of the turntable 17 will decrease, and at the same time, the sliding blocks 1 8 will be subjected to a centrifugal force which will be reduced. At this time, the sliding block 18 will slide toward the center of the turntable 17 and press the pressing slider 20 close to the center of the turntable 17. The pressing slider 20 will press the pressing switch 24 at the lower end through the sliding ring 21 and the fixed shaft 2101. At this time, the warning light 22 at the lower end will light up, reminding the staff that the speed is too low. When the cylinder 3 rotates too fast, the centrifugal force on the sliding block 18 will increase. At this time, the sliding block 18 will slide toward the outside of the turntable 17, squeezing the pressing slider 20 away from the center of the turntable 17. At this time, the pressing slider 20 will press the pressing switch 24 at the upper end through the sliding ring 21 and the fixed shaft 2101. At this time, the warning light 22 at the upper end will light up, reminding the staff that the speed is too high and to make adjustments in time.

Claims

1. A mining ball mill with a concentrated ore feeding device, comprising a base frame (1), a support frame (2), a cylinder (3), a driving assembly (4), a feeding hopper (5), a feeding transmission assembly (6), a side frame (7), a mounting mechanism and a detection mechanism; the support frames (2) are provided with two, and the two support frames (2) are fixedly connected to the upper end surface of the base frame (1); the cylinder (3) is rotatably connected to the upper ends of the two support frames (2); Features: The drive assembly (4) is fixedly mounted on the upper end surface of the front end of the base frame (1), and the drive assembly (4) is fixedly mounted on the cylinder (3); the feeding hopper (5) is fixedly connected to the upper end surface of the rear end of the base frame (1); the feeding transmission assembly (6) is fixedly mounted on the upper end surface of the feeding hopper (5); the side frame (7) is fixedly connected to the right end surface of the base frame (1); the mounting mechanism is arranged on the inner side of the cylinder (3); and the detection mechanism is arranged at the upper end of the side frame (7).

2. A mining ball mill with a concentrated ore feeding device as claimed in claim 1, Features: The mounting mechanism comprises: a mounting groove (301), a lining plate (8) and a fixed sliding block (801); a plurality of the mounting grooves (301) are provided, and the plurality of mounting grooves (301) are all arranged on the inner side of the cylinder (3); a plurality of the lining plates (8) are provided, and the plurality of lining plates (8) are all slidably connected to the inner side of the cylinder (3); a plurality of the fixed sliding blocks (801) are provided, and the plurality of fixed sliding blocks (801) are respectively fixedly connected to the outer sides of the plurality of lining plates (8), and the plurality of fixed sliding blocks (801) are respectively slidably connected to the inner sides of the mounting grooves (301).

3. A mining ball mill with a concentrated ore feeding device as claimed in claim 2, Features: The mounting mechanism further comprises: a mounting plate (9) and a mounting spring (10); the mounting plate (9) is provided in a plurality of groups, and the plurality of groups of mounting plates (9) are respectively slidably connected to the inner sides of the plurality of lining plates (8); the mounting spring (10) is provided in a plurality of groups, and the plurality of groups of mounting springs (10) are respectively fixedly connected to the inner sides of the plurality of groups of mounting plates (9).

4. A mining ball mill with a concentrated ore feeding device as claimed in claim 3, Features: The installation mechanism further comprises: an inclined groove (901), a pressing block (11) and a fixing pin (1101); the inclined groove (901) is provided in a plurality of groups, and the plurality of groups of inclined grooves (901) are respectively opened on the inner sides of the plurality of installation plates (9); the pressing block (11) is provided in a plurality of groups, and the plurality of groups of pressing blocks (11) are respectively slidably connected to the inner sides of the plurality of lining plates (8); the fixing pin (1101) is provided in a plurality of groups, and the plurality of groups of fixing pins (1101) are respectively fixedly connected to the lower end surfaces of the plurality of groups of pressing blocks (11), and the plurality of groups of fixing pins (1101) are respectively slidably connected to the inner sides of the plurality of groups of inclined grooves (901).

5. A mining ball mill with a concentrated ore feeding device as claimed in claim 1, Features: The detection mechanism comprises: a fixing ring (12) and a driving gear (13); the fixing ring (12) is fixedly connected to the outside of the cylinder (3); the driving gear (13) is rotatably connected to the upper end of the side frame (7), and the driving gear (13) is meshed with the fixing ring (12).

6. A mining ball mill with a concentrated ore feeding device as claimed in claim 5, Features: The detection mechanism further comprises: a fixed gear (14) and a connecting gear (15); the fixed gear (14) is rotatably connected to the upper end of the side frame (7), and the fixed gear (14) is fixedly connected to the driving gear (13); the connecting gear (15) is rotatably connected to the upper end of the side frame (7), and the connecting gear (15) is meshed with the fixed gear (14).

7. A mining ball mill with a concentrated ore feeding device as claimed in claim 6, Features: The detection mechanism further comprises: a fixed shell (16), a rotating disk (17), a sliding block (18) and a tension spring (19); the fixed shell (16) is fixedly connected to the upper end surface of the side frame (7); the rotating disk (17) is rotatably connected to the inner side of the fixed shell (16), and the rotating disk (17) is fixedly connected to the connecting gear (15); two sliding blocks (18) are provided, and the two sliding blocks (18) are both slidably connected to the inner side of the rotating disk (17); two tension springs (19) are provided, and one end of the two tension springs (19) is respectively fixedly connected to the outer sides of the two sliding blocks (18), and the other ends of the two tension springs (19) are both fixedly connected to the inner side of the rotating disk (17).

8. A mining ball mill with a concentrated ore feeding device as claimed in claim 7, Features: The detection mechanism further comprises: a pressing slider (20), a sliding ring (21), a fixed shaft (2101) and a reset spring (2102); the pressing slider (20) is provided with two groups, and the two groups of pressing sliders (20) are both slidably connected to the inner side of the rotating disk (17); the sliding ring (21) is provided with two groups, and the two sliding rings (21) are both slidably connected to the inner side of the fixed housing (16); the fixed shaft (2101) is provided with two groups, and the two groups of fixed shafts (2101) are respectively fixedly connected to the outer sides of the two sliding rings (21); the reset spring (2102) is provided with two groups, and one end of the two groups of reset springs (2102) is respectively fixedly connected to the outer sides of the two sliding rings (21), and the other end of the two groups of reset springs (2102) is both fixedly connected to the inner side of the fixed housing (16).

9. A mining ball mill with a concentrated ore feeding device as claimed in claim 8, Features: The detection mechanism further comprises: a warning light (22), a fixed bracket (23) and a push switch (24); two warning lights (22) are provided, the two warning lights (22) are fixedly mounted to each other, and the two warning lights (22) are mounted on the upper end surface of the fixed shell (16); two fixed brackets (23) are provided, and the two fixed brackets (23) are fixedly connected to the outside of the fixed shell (16); two push switches (24) are provided, and the two push switches (24) are respectively fixedly mounted on the inside of the two fixed brackets (23).

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