CN220797983U - Explosion-proof electric device - Google Patents

Abstract

The utility model discloses an explosion-proof electric device, which comprises an explosion-proof shell and a motor, wherein a power output assembly and a limiting assembly are arranged in the explosion-proof shell, the power output assembly comprises a lifting screw rod and a push rod, the limiting assembly comprises a limiting module and a reducing rod, the upper end of the reducing rod is provided with a magnet, an induction port is arranged on the limiting module, the induction port is arranged above the magnet, a first reducing assembly and a second reducing assembly are also arranged in the explosion-proof shell, two ends of the first reducing assembly are respectively connected with the motor and the lifting screw rod, two ends of the second reducing assembly are respectively connected with the lifting screw rod and the reducing rod, the motor drives the push rod to move up and down through the first reducing assembly, the lifting screw rod drives the reducing rod to drive the magnet to rotate together through the second reducing assembly, and the induction port can transmit the rotating data of the magnet to the limiting module.

Description

Explosion-proof electric device

Technical Field

The utility model belongs to the technical field of explosion-proof equipment accessories, in particular to an explosion-proof electric device.

Background

With the rapid development of social economy, flammable and explosive places such as petrochemical enterprises, oil terminals, oil depots and airports are more and more, the fire hazard of large-space building facilities in the places is more and more prominent, and the fire disaster triggered by electrical sparks is more and more when the fire disaster occurs; the national requirements for explosion-proof electric devices are more and more, so that the fire-fighting device matched with the explosion-proof electric devices is more and more important in wide application and wider in application range.

The explosion-proof electric device is characterized in that a movable nozzle is pushed and pulled by a push rod to change the distance between the movable nozzle and a fixed water pipe shaft so as to change the water jet distance, but the distance between the nozzle and the water pipe shaft has a limit value, most of explosion-proof electric devices applied to the fire water cannon in the market have complex internal structures, and when the push rod pushes the nozzle to reach the limit distance between the nozzle and the water pipe shaft, the movement of the electric push rod cannot be stopped for the first time, so that the fire water cannon is damaged, a fire extinguishing source cannot be extinguished, and the life safety and property safety of people are affected.

Disclosure of Invention

The utility model aims to provide an explosion-proof electric device which has a simple structure and can stop the movement of an electric push rod at the first time after the push rod pushes a nozzle to reach the limit distance between water pipe shafts.

The purpose of the utility model is realized in the following way:

the utility model provides an explosion-proof electric actuator, includes explosion-proof casing and the motor of setting in explosion-proof casing, be equipped with power take off subassembly and restriction in the explosion-proof casing power take off subassembly stroke spacing subassembly, power take off subassembly includes lift lead screw and cover and establishes the push rod on the lift lead screw, spacing subassembly includes spacing module and reducing gear, the reducing gear upper end is equipped with magnet, be equipped with the induction port of induction magnet turned angle on the spacing module, the induction port sets up in magnet top, still be equipped with first reducing gear and second reducing gear in the explosion-proof casing, the both ends of first reducing gear are connected with motor and lift lead screw respectively, the both ends of second reducing gear are connected with lift lead screw and reducing gear respectively, the motor drives through first reducing gear the lift lead screw rotates and drives the push rod and reciprocate, the lift lead screw rotates and drives magnet rotation together through the second reducing gear, the induction port can be with magnet pivoted data transmission to spacing module.

Further, the speed reducing rod comprises a rotating rod and a speed reducer arranged on the rotating rod, and the magnet is arranged on the speed reducer.

Further, the first speed reducing assembly comprises a first gear, a second gear meshed with the first gear and a third gear meshed with the second gear, the first gear is arranged at the bottom end of the motor, a lifting gear is arranged on the lifting screw rod, the third gear is meshed with the lifting gear, the second speed reducing assembly comprises a fourth gear meshed with the lifting gear and a limiting gear meshed with the fourth gear, and the limiting gear is sleeved on the rotating rod.

Further, be equipped with motor groove, spacing groove and gear groove in the explosion-proof casing, the motor is installed at the motor inslot, the bottom setting of motor is connected with first speed reduction subassembly in the gear inslot, spacing subassembly is installed in the spacing inslot, first speed reduction subassembly and second speed reduction subassembly are installed in the gear inslot, the output hole that runs through explosion-proof casing has been seted up in the gear groove, the lift lead screw sets up in the output hole, and the bottom setting of lift lead screw is connected with first speed reduction subassembly in the gear groove, the push rod cover is established on the lift lead screw, the top setting of push rod is outside the output hole, the through-hole has been seted up on the spacing groove, the one end of dwang passes the through-hole setting and is connected with second speed reduction subassembly in the gear inslot.

Further, the fixed slot is formed in the lifting screw rod, the fixed block is arranged in the fixed slot, the lifting hole is formed in the lifting gear, the clamping groove is formed in the inner wall of the lifting hole, the fixed block is arranged in the clamping groove and is clamped with the clamping groove, the fixed plate is arranged on the lifting screw rod in a surrounding mode, and the bottom end of the lifting gear is abutted to the fixed plate.

Further, explosion-proof casing includes main shell, motor cover, spacing lid and gear lid, motor groove, spacing groove and gear groove are all offered on the main shell, motor cover lid closes in the motor top, spacing lid and gear lid cooperation main shell are installed spacing subassembly and first reduction subassembly, second reduction subassembly respectively at spacing groove and gear inslot.

Further, the gear cover is provided with a rotating hole, one end of the lifting screw rod penetrates through the rotating hole and is arranged outside the gear cover, one end of the lifting screw rod, which is arranged outside the gear cover, is provided with a hand wheel, and the hand wheel is detachably arranged on the lifting screw rod.

Furthermore, a connecting groove is formed in the limiting groove, a connecting hole is formed in the limiting module, and a fixing rod is arranged in the connecting hole and the connecting groove.

Further, a limiting plate is arranged in the limiting groove, one end of the limiting plate is provided with a limiting part in an extending mode, the limiting part is in butt joint with the upper surface of the speed reducer, a shaft hole is formed in the limiting part, one end of the speed reducer is provided with a speed reducing shaft in an extending mode, the speed reducing shaft penetrates through the shaft hole to be arranged outside the limiting part, and the magnet is arranged on the speed reducing shaft.

Further, the induction port comprises a frame plate and a Hall magnetic sensor arranged on the frame plate, the frame plate is connected with the limiting module, and the Hall magnetic sensor is positioned right above the magnet.

Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

the utility model provides an explosion-proof electric device, includes explosion-proof casing and the motor of setting in explosion-proof casing, be equipped with power take off subassembly and restriction in the explosion-proof casing power take off subassembly stroke spacing subassembly, power take off subassembly includes lift lead screw and cover establishes the push rod on the lift lead screw, spacing subassembly includes spacing module and reducing bar, the reducing bar upper end is equipped with magnet, be equipped with the induction port of induction magnet rotation angle on the spacing module, the induction port sets up in the magnet top, still be equipped with first reducing assembly and second reducing assembly in the explosion-proof casing, the both ends of first reducing assembly are connected with motor and lift lead screw respectively, the both ends of second reducing assembly are connected with lift lead screw and reducing bar respectively, the motor passes through first reducing assembly drive lift lead screw rotates and drives the push rod and reciprocate, the lift lead screw rotates and drives magnet rotation together through the second reducing assembly, the induction port can be with magnet pivoted data transmission to spacing module; the external screw thread on the lifting screw rod is matched with the internal screw thread in the push rod, after the push rod is connected with the nozzle on the fire water monitor, the push rod is in a fixed state, the driving motor can drive the first speed reducing assembly to rotate, thereby driving the lifting screw rod to rotate, at the moment, the push rod moves up and down at the lifting screw rod, the distance between the nozzle and the water pipe shaft is changed, the water jet distance is changed, the fire extinguishing area can be further enlarged, the lifting screw rod rotates to synchronously drive the second speed reducing assembly to rotate, thereby driving the speed reducing rod and the magnet on the speed reducing rod to rotate together, the sensing port on the limiting module can transmit the angle data of the magnet to the limiting module, a user can set the maximum value or the minimum value of the magnet rotation angle on the limiting module, after the rotation angle of the magnet reaches the maximum value or the minimum value set by the user, the limiting module can control the motor to stop rotating, the synchronous push rod also stops moving up or down continuously, the fire water monitor is prevented from being damaged when the push rod pushes the nozzle to reach the limit distance between the water pipe shaft, the fire water monitor cannot stop moving at the first time, and the fire water monitor can not extinguish fire water monitor, and accordingly life safety and property safety are influenced.

Drawings

Fig. 1 is a perspective view of the present utility model.

Fig. 2 is an exploded view of the present utility model.

Fig. 3 is an exploded view of the present utility model.

Fig. 4 is a perspective view of the present utility model.

Fig. 5 is a perspective view of the main housing of the present utility model.

Fig. 6 is a schematic structural view of the limit module and the deceleration rod according to the present utility model.

Fig. 7 is a schematic structural view of a limiting plate and a deceleration rod according to the present utility model.

Fig. 8 is an exploded view of the reduction rod and second reduction assembly of the present utility model.

Fig. 9 is an exploded view of the gear cover and power take-off assembly of the present utility model.

Fig. 10 is an exploded view of the lifting gear and the lifting screw of the present utility model.

Fig. 11 is a perspective view of the lifting gear of the present utility model.

Fig. 12 is an exploded view of the main housing and the spacing module of the present utility model.

Fig. 13 is a perspective view of a spacing assembly of the present utility model.

Fig. 14 is an exploded view of the spacing assembly of the present utility model.

Fig. 15 is a perspective view of a spacing module and a sensing port of the present utility model.

The meaning indicated by the reference numerals in the figures:

1-an explosion-proof shell; 2-an electric motor; 3-a power take-off assembly; 4-a limiting assembly; 5-lifting the screw rod;

6-pushing rod; 7-a limit module; 8-a deceleration rod; 9-a frame plate; 10-a first reduction assembly;

11-a second reduction assembly; 12-limiting plates; 13-a sense port; 14-a hall magnetic sensor;

15-connecting grooves; 16-connecting holes; 17-a fixed rod; 18 a first gear; 19-a second gear;

20-a third gear; 21-lifting gear; 22-fourth gear; 23-limiting gears; 24-motor slots;

25-limit grooves; 26-gear groove; 27-an output aperture; 28-through holes; 29-a fixed groove;

30-fixing blocks; 31-lifting holes; 32-clamping a channel; 33-a fixed plate; 34-main housing; 35-motor cover;

36-limiting cover; 37-gear cover; 38-rotating the hole; 39-a hand wheel;

45-magnet; 46-rotating a rod; 47-reducer; 48-limiting part; 49-shaft holes; 50-reduction shaft.

Detailed Description

The utility model is further described with reference to the following specific examples:

the explosion-proof electric device comprises an explosion-proof shell 1 and a motor 2 arranged in the explosion-proof shell 1, wherein a power output assembly 3 and a limiting assembly 4 for limiting the travel of the power output assembly 3 are arranged in the explosion-proof shell 1, the power output assembly 3 comprises a lifting screw 5 and a push rod 6 sleeved on the lifting screw 5, the limiting assembly 4 comprises a limiting module 7 and a reducing rod 8, a magnet 45 is arranged at the upper end of the reducing rod 8, an induction port 13 for inducing the rotation angle of the magnet 45 is arranged on the limiting module 7, the induction port 13 is arranged above the magnet 45, a first reducing assembly 10 and a second reducing assembly 11 are also arranged in the explosion-proof shell 1, two ends of the first reducing assembly 10 are respectively connected with the motor 2 and the lifting screw 5, two ends of the second reducing assembly 11 are respectively connected with the lifting screw 5 and the reducing rod 8, the motor 2 drives the lifting screw 5 to rotate through the first reducing assembly 10 to drive the push rod 6 to move up and down, and the lifting screw 5 rotates through the second reducing assembly 11 to drive the reducing rod 8 to rotate, and the induction port 13 is driven by the second reducing assembly 11 to drive the magnet 45 to rotate together, and the magnet 45 is driven by the second reducing assembly to rotate together with the magnet 45 to rotate to the magnet 45 to the limit port 13; the external screw thread on the lifting screw rod 5 is matched with the internal screw thread in the push rod 6, after the push rod 6 is connected with the nozzle on the fire water monitor, the push rod 6 is in a fixed state, the driving motor 2 drives the first speed reduction assembly 10 to rotate, thereby driving the lifting screw rod 5 to rotate, at the moment, the push rod 6 moves up and down on the lifting screw rod 5, the distance between the nozzle and the water pipe shaft is changed, the water injection distance is changed, the fire extinguishing area can be further enlarged, the lifting screw rod 5 rotates to synchronously drive the second speed reduction assembly 11 to rotate, thereby driving the speed reduction rod 8 to rotate together with the magnet 45 on the speed reduction rod 8, the sensing port 13 on the limit module 7 can transmit the rotating angle data of the magnet 45 to the limit module 7, a user can set the maximum value or the minimum value of the rotating angle of the magnet 45 on the limit module 7 first time, after the rotating angle of the magnet 45 reaches the maximum value or the minimum value set by the user, the limit module 7 can control the motor 2 to stop rotating, the synchronous push rod 6 also stop to move up or move down continuously, the fire water monitor 6 stops moving up or down after the push rod 6 pushes the limit distance between the nozzle and the water pipe shaft, thereby the fire water monitor is prevented from being damaged, and fire water monitor safety is affected.

Preferably, the speed reducing rod 8 includes a rotating rod 46 and a speed reducer 47 disposed on the rotating rod 46, and the magnet 45 is disposed on the speed reducer 47; the arrangement of the speed reducer 47 ensures that the angle rotation of the magnet 45 arranged on the speed reducer 47 is not too fast, and avoids the influence on the normal use of the fire monitor due to the too short ascending or descending distance of the push rod 6 on the lifting screw rod 5 caused by the too fast angle rotation of the magnet 45.

Preferably, the first speed reducing assembly 10 includes a first gear 18, a second gear 19 meshed with the first gear 18, and a third gear 20 meshed with the second gear 19, the first gear 18 is disposed at the bottom end of the motor 2, the lifting screw 5 is provided with a lifting gear 21, the third gear 20 is meshed with the lifting gear 21, the second speed reducing assembly 11 includes a fourth gear 22 meshed with the lifting gear 21, and a limiting gear 23 meshed with the fourth gear 22, and the limiting gear 23 is sleeved on the rotating rod 46; the second gear 19, the third gear 20 and the lifting gear 21 all comprise large gears and small gears which are coaxially arranged, the first gear 18 is meshed with the large gears of the second gear 19, the small gears of the second gear 19 are meshed with the large gears of the third gear 20, the small gears of the third gear 20 are meshed with the large gears of the lifting gear 21, the purpose of speed reduction is achieved, the motor 2 rotates to drive the first gear 18 to rotate, the first gear 18 rotates to drive the second gear 19 to rotate, the second gear 19 rotates to drive the third gear 20 to rotate, the third gear 20 drives the lifting gear 21 to rotate to enable the lifting screw rod 5 to rotate, the lifting gear 21 rotates to drive the fourth gear 22 to rotate to drive the limit gear 23 meshed with the fourth gear 22 to rotate, the limit gear 23 is sleeved on the speed reducing rod 8, the limit gear 23 rotates to drive the speed reducing rod 8 to enable the magnet 45 on the speed reducing rod 8 to rotate, the sensing port 13 on the limit module 7 can enable the magnet 45 to rotate, the data to be finally transmitted to the limit module 7, and the maximum value of the magnet 45 initially arranged on the limit module 7 is sensed, or the maximum value of the magnet 45 is controlled to prevent the fire monitor from damaging the small water cannon 6.

Preferably, a motor groove 24, a limit groove 25 and a gear groove 26 are arranged in the explosion-proof housing 1, the motor 2 is installed in the motor groove 24, the bottom end of the motor 2 is arranged in the gear groove 26 and is connected with the first speed reduction assembly 10, the limit assembly 4 is installed in the limit groove 25, the first speed reduction assembly 10 and the second speed reduction assembly 11 are installed in the gear groove 26, an output hole 27 penetrating through the explosion-proof housing 1 is formed in the gear groove 26, the lifting screw 5 is arranged in the output hole 27, the bottom end of the lifting screw 5 is arranged in the gear groove 26 and is connected with the first speed reduction assembly 10, the push rod 6 is sleeved on the lifting screw 5, the top end of the push rod 6 is arranged outside the output hole 27, a through hole 28 is formed in the limit groove 25, and one end of the rotary rod 46 penetrates through the through hole 28 and is arranged in the gear groove 26 and is connected with the second speed reduction assembly 11; the motor 2 is installed in the motor groove 24, the limiting component 4 is installed in the limiting groove 25, the first speed reducing component 10 and the second speed reducing component 11 are installed in the gear groove 26, the lifting screw rod 5 is arranged in the output hole 27, so that the motor 2, the limiting component 4, the first speed reducing component 10 and the second speed reducing component 11 can normally operate, and the situation that the motor 2, the lifting screw rod 5, the limiting component 4, the first speed reducing component 10 and the second speed reducing component 11 move and are misplaced after long-time use is avoided, and the normal use of the fire water cannon is affected.

Preferably, a fixing groove 29 is formed in the lifting screw 5, a fixing block 30 is arranged in the fixing groove 29, a lifting hole 31 is formed in the lifting gear 21, a clamping groove 32 is formed in the inner wall of the lifting hole 31, the fixing block 30 is arranged in the clamping groove 32 and is clamped with the clamping groove 32, a fixing plate 33 is circumferentially arranged on the lifting screw 5, and the bottom end of the lifting gear 21 is abutted against the fixing plate 33; the lifting gear 21 is arranged on the lifting screw rod 5 through the fixing plate 33, and the fixing block 30 on the lifting screw rod 5 is clamped with the clamping groove 32 in the lifting hole 31 on the lifting gear 21, so that the lifting screw rod 5 can be driven to synchronously rotate while the lifting gear 21 rotates, the push rod 6 on the lifting screw rod 5 can synchronously move up and down, the normal use of a fire monitor is facilitated, and a fire extinguishing source can be extinguished in time.

Preferably, the explosion-proof housing 1 includes a main housing 34, a motor cover 35, a limit cover 36 and a gear cover 37, the motor slot 24, the limit slot 25 and the gear slot 26 are all opened on the main housing 34, the motor cover 35 covers the upper part of the motor 2, and the limit cover 36 and the gear cover 37 cooperate with the main housing 34 to respectively mount the limit assembly 4, the first reduction assembly 10 and the second reduction assembly 11 in the limit slot 25 and the gear slot 26; the arrangement of the motor cover 35, the limit cover 36 and the gear cover 37 prevents attachments generated by a fire source from entering the main shell 34 after long-time use, and influences the normal use of the explosion-proof device.

Preferably, a rotation hole 38 is formed in the gear cover 37, one end of the lifting screw 5 passes through the rotation hole 38 and is arranged outside the gear cover 37, one end of the lifting screw 5 arranged outside the gear cover 37 is provided with a hand wheel 39, and the hand wheel 39 is detachably mounted on the lifting screw 5; when the motor 2 is damaged, a user can adjust the distance between the nozzle and the water pipe shaft by rotating the hand wheel 39, so that the water jet distance is changed, and the fire extinguishing area can be further enlarged.

Preferably, a connecting groove 15 is formed in the limiting groove 25, a connecting hole 16 is formed in the limiting module 7, and a fixing rod 17 is arranged in the connecting hole 16 and the connecting groove 15; the limiting module 7 is fixed in the limiting groove 25 through the connecting hole 16 and the fixing rod 17 in the connecting groove 15, so that the limiting module 7 can be fixedly installed in the limiting groove 25, and the limiting module 7 is prevented from moving in the limiting groove 25 to damage the limiting module 7.

Preferably, a limiting plate 12 is arranged in the limiting groove 25, a limiting portion 48 is formed at one end of the limiting plate 12 in an extending manner, the limiting portion 48 is abutted against the upper surface of the speed reducer 47, a shaft hole 49 is formed in the limiting portion 48, a speed reducing shaft 50 is formed at one end of the speed reducer 47 in an extending manner, the speed reducing shaft 50 passes through the shaft hole 49 and is arranged outside the limiting portion 48, and the magnet 45 is arranged on the speed reducing shaft 50; the upper end of the speed reducer 47 is abutted against the lower end of the limiting part 48, so that the phenomenon that the rotating rod 46 moves upwards after long-time rotation, so that the magnet 45 on the speed reducing shaft 50 moves upwards together, the magnet 45 contacts with the sensing port 13, the sensing port 13 is affected to transmit data to the limiting module 7, and the limiting module 7 is affected to control the motor 2.

Preferably, the sensing port 13 comprises a frame plate 9 and a hall magnetic sensor 14 arranged on the frame plate, the frame plate 9 is connected with the limit module 7, and the hall magnetic sensor 14 is positioned right above the magnet 45.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. An explosion-proof electric device, includes explosion-proof housing (1) and motor (2) of setting in explosion-proof housing (1), its characterized in that: the explosion-proof device is characterized in that a power output assembly (3) and a limiting assembly (4) for limiting the stroke of the power output assembly (3) are arranged in the explosion-proof shell (1), the power output assembly (3) comprises a lifting screw rod (5) and a push rod (6) sleeved on the lifting screw rod (5), the limiting assembly (4) comprises a limiting module (7) and a reducing rod (8), a magnet (45) is arranged at the upper end of the reducing rod (8), an induction port (13) for inducing the rotation angle of the magnet (45) is arranged on the limiting module (7), the induction port (13) is arranged above the magnet (45), a first reducing assembly (10) and a second reducing assembly (11) are further arranged in the explosion-proof shell (1), the two ends of the first reducing assembly (10) are respectively connected with a motor (2) and the lifting screw rod (5), the two ends of the second reducing assembly (11) are respectively connected with the lifting screw rod (5) and the reducing rod (8), the motor (2) drives the lifting screw rod (5) to rotate through the first reducing assembly (10) to drive the lifting screw rod (5) to rotate, the reducing rod (5) to rotate together with the lifting screw rod (5) to drive the reducing rod (45) to rotate together, the sensing port (13) can transmit data of rotation of the magnet (45) to the limiting module (7).

2. An explosion-proof electric device according to claim 1, wherein: the speed reducing rod (8) comprises a rotating rod (46) and a speed reducer (47) arranged on the rotating rod, and the magnet (45) is arranged on the speed reducer (47).

3. An explosion-proof electric device according to claim 2, wherein: the first speed reduction assembly (10) comprises a first gear (18), a second gear (19) meshed with the first gear (18), and a third gear (20) meshed with the second gear (19), wherein the first gear is arranged at the bottom end of the motor (2), a lifting gear (21) is arranged on the lifting screw rod (5), the third gear (20) is meshed with the lifting gear (21), the second speed reduction assembly (11) comprises a fourth gear (22) meshed with the lifting gear (21) and a limiting gear (23) meshed with the fourth gear (22), and the limiting gear (23) is sleeved on the rotating rod (46).

4. An explosion-proof electric device according to claim 3, wherein: be equipped with motor groove (24), spacing groove (25) and gear groove (26) in explosion-proof housing (1), motor (2) are installed in motor groove (24), the bottom setting of motor (2) is connected with first reducing gear assembly (10) in gear groove (26), spacing subassembly (4) are installed in spacing groove (25), first reducing gear assembly (10) and second reducing gear assembly (11) are installed in gear groove (26), output hole (27) that run through explosion-proof housing (1) have been seted up in gear groove (26), lifting screw (5) set up in output hole (27), the bottom setting of lifting screw (5) is connected with first reducing gear assembly (10) in gear groove (26), push rod (6) cover is established on lifting screw (5), the top of push rod (6) is set up outside output hole (27), through-hole (28) have been seted up on spacing groove (25), one end of dwang (46) is passed setting up in gear groove (26) and is connected with second reducing gear assembly (11).

5. An explosion-proof electric device according to claim 4, wherein: the lifting screw rod (5) is provided with a fixing groove (29), a fixing block (30) is arranged in the fixing groove (29), the lifting gear (21) is provided with a lifting hole (31), the inner wall of the lifting hole (31) is provided with a clamping channel (32), the fixing block (30) is arranged in the clamping channel (32) and is clamped with the clamping channel (32), the lifting screw rod (5) is provided with a fixing plate (33) in a surrounding mode, and the bottom end of the lifting gear (21) is abutted to the fixing plate (33).

6. An explosion-proof electric device according to claim 5, wherein: explosion-proof casing (1) is including main shell (34), motor cover (35), spacing lid (36) and gear lid (37), motor groove (24), spacing groove (25) and gear groove (26) are all offered on main shell (34), motor cover (35) lid closes in motor (2) top, spacing lid (36) and gear lid (37) cooperate main shell (34) respectively with spacing subassembly (4) and first reduction subassembly (10), second reduction subassembly (11) are installed in spacing groove (25) and gear groove (26).

7. An explosion-proof electric device according to claim 6, wherein: the gear cover (37) is provided with a rotating hole (38), one end of the lifting screw rod (5) penetrates through the rotating hole (38) to be arranged outside the gear cover (37), one end of the lifting screw rod (5) arranged outside the gear cover (37) is provided with a hand wheel (39), and the hand wheel (39) is detachably arranged on the lifting screw rod (5).

8. An explosion-proof electric device according to claim 4, wherein: the limiting groove (25) is internally provided with a connecting groove (15), the limiting module (7) is provided with a connecting hole (16), and the connecting hole (16) and the connecting groove (15) are internally provided with a fixing rod (17).

9. An explosion-proof electric device according to claim 8, wherein: the limiting groove (25) is internally provided with a limiting plate (12), one end of the limiting plate (12) is provided with a limiting part (48) in an extending mode, the limiting part (48) is in butt joint with the upper surface of the speed reducer (47), the limiting part (48) is provided with a shaft hole (49), one end of the speed reducer (47) is provided with a speed reducing shaft (50) in an extending mode, the speed reducing shaft (50) penetrates through the shaft hole (49) to be arranged outside the limiting part (48), and the magnet (45) is arranged on the speed reducing shaft (50).

10. An explosion-proof electric device according to claim 3, wherein: the induction port (13) comprises a frame plate (9) and a Hall magnetic sensor (14) arranged on the frame plate, the frame plate (9) is connected with the limiting module (7), and the Hall magnetic sensor (14) is positioned right above the magnet (45).