CN209790680U - Explosion-proof system and ultrasonic cleaner - Google Patents

Abstract

The utility model relates to an explosion-proof system and ultrasonic cleaner, it is including the casing that is used for bearing ultrasonic cleaning equipment, the block terminal that is used for bearing electrical control element, casing upper end opening and articulated have one to open and close open-ended apron, the casing is made by steel sheet an organic whole and inside formation washs the region, the casing wall thickness is 6mm-20mm, communicate through explosion-proof hose between casing and the block terminal. The utility model discloses have and to reduce burning, explosion probability, improve the effect of production security.

Description

Explosion-proof system and ultrasonic cleaner

Technical Field

The invention relates to the technical field of ultrasonic explosion prevention, in particular to an explosion prevention system and an ultrasonic cleaning machine.

Background

the principle of the existing ultrasonic cleaning machine is mainly that sound energy of a power ultrasonic frequency source is converted into mechanical vibration through an energy converter, and ultrasonic waves are radiated to cleaning liquid in a groove through the wall of the cleaning groove; the micro-bubbles in the liquid in the tank can keep vibrating under the action of the sound wave when being radiated by the ultrasonic wave. The adsorption of the dirt and the surface of the cleaning piece is damaged, the dirt layer is damaged by fatigue and is separated, and the vibration of the gas bubbles cleans the solid surface.

When the existing ultrasonic cleaning machine is used, most of used liquid is volatile and combustible cleaning agent, such as hydrocarbon cleaning agent, the cleaning effect of the hydrocarbon cleaning agent is good, and the environmental protection requirement is met. However, the flash point of the hydrocarbon cleaning agent is generally about 50 ℃, and the hydrocarbon cleaning agent belongs to high-flash-point flammable liquid in the classification and sign of commonly used dangerous chemicals (GB 13690-92) in China. Although the flash point is high, there is a possibility that the volatilized combustible gas may come into contact with the electrical control unit of the ultrasonic cleaner, resulting in a risk of combustion and even a serious consequence of an explosion, compromising production safety.

Disclosure of Invention

the invention aims to provide an explosion-proof system which has the effects of reducing the probability of combustion and explosion and improving the production safety.

The above object of the present invention is achieved by the following technical solutions:

An explosion-proof system comprises a shell for bearing ultrasonic cleaning equipment and a distribution box for bearing an electrical control element, wherein an opening is formed in the upper end of the shell, an opening-closing cover plate is hinged to the upper end of the shell, the shell is integrally made of steel plates, a cleaning area is formed inside the shell, the wall thickness of the shell ranges from 6mm to 20mm, and the shell is communicated with the distribution box through an explosion-proof hose.

By adopting the technical scheme, the casing and the distribution box are separately arranged, so that the electric control element can be separated from the casing, and the electric control element is placed in the distribution box, thereby greatly reducing the possibility that combustible gas emitted by a cleaning agent in the casing is contacted with the electric control element, reducing the probability of combustion/explosion in the working process and ensuring the production safety of the electric control element; the wall thickness of the shell is set to be 6-20 mm, and the shell is integrally formed, so that the bearing capacity of the side wall of the shell is ensured, even if combustible gas in the shell explodes carelessly, the shell is difficult to explode by the explosion force, and the upper end of the shell is rotatably connected with the cover plate, so that the bearing capacity of the cover plate is low, the explosion impact force is easy to escape from the cover plate, and on one hand, the explosion impact force can be guided to explode upwards, and the influence on surrounding workers or mechanical equipment is reduced; on the other hand, the explosion impact force finds the venting point, so that the impact force on the shell can be reduced, and the stability of the shell is guaranteed.

The invention is further configured to: still be provided with circulative cooling mechanism in the casing, circulative cooling mechanism is including setting up in the casing and being the cooling tube of continuous U type setting, and the cooling tube both ends communicate with external cooling water set respectively.

By adopting the technical scheme, because the shell is positioned in the closed space, the combustible gas is exploded by only two sources, one is that the temperature in the shell is too high to reach the ignition point of the combustible gas, and the other is that the shell generates sparks with the electrical element to contact with the combustible gas; cooling water is circulated along the cooling pipe through a cooling water unit, so that the cooling water exchanges heat with air and a cleaning agent in the machine shell through the cooling pipe, the cleaning agent and the air in the machine shell are cooled, the temperature in the machine shell is ensured to be below the ignition temperature of combustible gas, and the combustible gas is prevented from spontaneously combusting under the influence of the temperature; and then be continuous U type setting through being in one section of cooling tube in the casing, make its reinforcing cooling tube and the interior sanitizer of casing or the area of contact of air, improve the cooling effect to in the casing.

The invention is further configured to: the cooling pipe is in and has seted up a plurality of through-holes one on one section of the top in the casing, the sleeve pipe has been cup jointed outward to the cooling pipe, the sleeve pipe is seted up on cooling pipe axis displacement and the outer wall and is opened and close the through-hole two that communicates with through-hole one in the displacement process, be provided with the driving piece that drives the sleeve pipe axis displacement in the casing, be provided with the temperature sensor who detects temperature in the casing and be connected and automatic start and stop the driving piece with the driving piece in the casing.

By adopting the technical scheme, when the temperature sensor detects that the temperature in the shell is higher than a normal value, generally the combustible gas starts to spontaneously combust, so that the temperature sensor outputs signals, the driving piece is controlled to drive the sleeve to move along the axial line of the cooling pipe, the first through hole and the second through hole are communicated, cooling water in the cooling pipe is sprayed out through the first through hole and the second through hole, the combustion point is sprayed with the cooling water, the fire is extinguished in time, and the combustible gas is prevented from exploding in the continuous combustion process; make its cooling water under the state at ordinary times, play the cooling effect, when necessary, convertible for extinguishing device, need not to add extinguishing device in addition, can realize the work of putting out a fire to combustible gas.

The invention is further configured to: the sleeve pipe comprises two semicylinders which are symmetrically arranged along the axis of the cooling pipe, connecting plates are respectively and rotatably connected to two sides of an opening of the end face of one semicylinder, slots which are communicated with each other are correspondingly formed in the connecting plates and the other half of the semicylinder, and inserting pins are inserted in the slots.

By adopting the technical scheme, the sleeve is composed of the two half cylinders, so that the two half cylinders can be conveniently and directly inserted into the cooling pipe, and then the bolt is inserted into the connecting plate and the other half cylinder, so that the two half cylinders are fixed, the sleeve which is stably sleeved outside the cooling pipe is formed, and the sleeve can be conveniently installed.

The invention is further configured to: the driving piece comprises a hydraulic cylinder and a push rod, the hydraulic cylinder is arranged in parallel along the axis of the sleeve, the push rod is fixedly connected to a telescopic rod of the hydraulic cylinder, the push rod is Z-shaped, grooves matched with the lower end of the push rod are formed in the adjacent surfaces of the semi-cylinders, and sliding grooves for inserting and linearly displacing the upper end of the push rod are arranged in parallel along the axis of the sleeve on the inner wall of the shell.

By adopting the technical scheme, the grooves which are correspondingly formed in the two half cylinders and are inserted at the lower ends of the push rods are convenient for realizing the connection work of the sleeve and the push rods, on one hand, when the hydraulic cylinder pushes the push rod to move along the axis, the hydraulic cylinder pushes the sleeve and simultaneously limits the displacement of the sleeve, so that the sleeve can only move along the axis of the cooling pipe; meanwhile, the sliding groove has a guiding effect on the upper end of the push rod, so that when the hydraulic cylinder drives the push rod to move, the upper end and the lower end of the push rod are stressed more evenly, and the push rod is not easy to bend in the moving process.

The invention is further configured to: one side of the cover plate is rotatably connected to the shell, the other side of the cover plate is limited on the shell through a limiting part, the limiting part comprises two limiting rods fixed at the lower end of the shell, a limiting groove correspondingly formed in the shell and used for inserting the limiting rods, a sliding groove vertically communicated with the limiting groove, and a limiting block slidably connected in the sliding groove, a fixing groove communicated with the sliding groove in the overturning process is formed in the limiting rod, a compression spring for driving the limiting block to be partially inserted in the fixing groove is arranged between the limiting block and the sliding groove, and a pull rod extending to the outer side of the shell is arranged at one end of the limiting block facing the; the upper end of one section of the limiting block in the limiting groove is provided with an inclined plane.

By adopting the technical scheme, in the overturning process of the cover plate, the limiting rod is inserted in the limiting groove of the shell, in the overturning process of the limiting rod, the limiting rod generates inclined surface transmission with the inclined surface at the upper end of the limiting block, the limiting block is driven to be hidden in the chute under the elastic action of the compression spring, so that the limiting rod can be continuously turned downwards, when the lower end of the cover plate is abutted against the upper end of the shell to seal the opening, the fixing groove on the limiting rod is communicated with the chute, and the limiting block is partially inserted in the fixing groove under the elastic action of the compression spring to limit the limiting rod, so that the cover plate is limited in the state of sealing the opening of the shell; when the cover plate needs to be opened, the limiting block is pulled by the pull rod to move outwards, the limiting effect on the limiting rod is relieved, and the cover plate can turn over relative to the shell.

The invention is further configured to: and air springs are respectively arranged on two sides of the vertical rotating point of the cover plate, and two ends of each air spring are respectively and rotatably connected with the shell and the cover plate.

Through adopting above-mentioned technical scheme, utilize the elastic action of air spring self, when ordering about the spacing effect that the stopper removed the gag lever post, the air spring orders about the apron and overturns automatically, opens the opening of casing, and the air spring gives the apron and plays the supporting role, and the staff of being convenient for carries out other operations to casing inside.

The invention is further configured to: and a sealing gasket is also arranged between the cover plate and the shell.

Through adopting above-mentioned technical scheme, guarantee the leakproofness between apron and the casing through sealed the pad, make its casing form airtight space, and then because sealed pad has certain elasticity, be convenient for press the apron, make its stopper peg graft in the work of fixed slot.

The invention also aims to provide the ultrasonic cleaning machine which has the effects of reducing the probability of combustion and explosion and improving the production safety.

The second aim of the invention is realized by the following technical scheme:

An ultrasonic cleaning machine comprises an explosion-proof system.

By adopting the technical scheme, the explosion-proof system is utilized to protect the ultrasonic cleaning machine, so that the effects of reducing the combustion and explosion probability and improving the production safety are achieved.

In conclusion, the beneficial technical effects of the invention are as follows:

1. The distribution box and the shell are respectively used for placing the electrical element and the ultrasonic cleaning equipment, so that the electrical element is separated independently, the possibility of the contact between the combustible gas in the shell and the electrical element is reduced, the natural/explosion probability of the combustible gas in the working process is reduced, and the production safety is improved;

2. The hydraulic cylinder is used for driving the sleeve to move forwards and backwards according to the driving, so that when combustible gas of the sleeve is spontaneously combusted, cooling water can be processed in time to be sprayed out through the first through hole and the second through hole, the combustible gas is subjected to fire extinguishing work, the cooling water is cooled at ordinary times, meanwhile, the fire extinguishing work can be carried out under necessary conditions, a fire extinguishing device does not need to be additionally arranged, and the effects of reducing required installation parts and saving the manufacturing cost are achieved.

Drawings

Fig. 1 is a schematic overall structure diagram of the first embodiment.

FIG. 2 is a schematic structural diagram of the second embodiment.

Fig. 3 is a partial structural view of the sleeve and the cooling pipe in fig. 2.

fig. 4 is an enlarged schematic view at a in fig. 3.

Fig. 5 is a partial schematic view of the drive member of fig. 3.

Fig. 6 is a partial cross-sectional view of the limiter of fig. 2.

In the figure, 1, a housing; 2. a distribution box; 3. an explosion-proof hose; 4. a cover plate; 5. a cooling tube; 6. a first through hole; 7. a sleeve; 71. a semi-cylinder; 72. a second through hole; 73. a connecting plate; 74. a bolt; 75. a slot; 8. a drive member; 81. a hydraulic cylinder; 82. a push rod; 9. a limiting member; 91. a limiting rod; 92. a limiting groove; 93. a chute; 94. a limiting block; 95. fixing grooves; 96. a compression spring; 97. a pull rod; 98. a connecting rod; 10. a groove; 11. a sliding groove; 12. a gas spring; 13. a gasket; 14. a limit ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: referring to fig. 1, the explosion-proof system disclosed by the invention comprises a casing 1 and a distribution box 2, wherein the upper end of the casing 1 is provided with an opening, and the opening is opened and closed by turning over a cover plate 4; the cabinet 1 is integrally formed by steel, the interior of the cabinet 1 is hollow and is used for placing ultrasonic cleaning equipment, and after the ultrasonic cleaning equipment is placed, a cleaning area of L1100mm W600mm H500mm is formed in the cabinet 1, in the embodiment, the wall thickness of the cabinet 1 is 6mm-20mm, preferably 15 mm; the distribution box 2 is hollow inside and used for placing an electrical control element, the size of the distribution box 2 is determined according to the size of the electrical control element, and meanwhile, the wall thickness of the distribution box 2 is not smaller than 10 mm; an explosion-proof hose 3 is communicated between the distribution box 2 and the casing 1 and used for placing an electric wire for communicating the ultrasonic cleaning equipment with an electric control element.

The machine shell 1 is also communicated with a circulating cooling mechanism, the circulating cooling mechanism comprises two groups of cooling pipes 5, the two groups of cooling pipes 5 are respectively positioned at two sides of the length direction of the machine shell 1, and one section of the two groups of cooling pipes 5 positioned in the machine shell 1 is continuously arranged in a U shape and positioned in a cleaning area; the two ends of the cooling pipe 5, which are positioned outside the machine shell 1, are communicated with a water chilling unit, and cooling water is driven to circulate in the cooling pipe 5 through the water chilling unit.

Referring to fig. 6, in this embodiment, a gasket 13 is further disposed between the lower end of the cover plate 4 and the upper end of the casing 1.

Example 2: referring to fig. 3 and 4, the difference from embodiment 1 is that: a section of the cooling pipe 5, which is positioned at the uppermost part in the shell 1 (refer to fig. 2), is provided with a plurality of through holes I6, a section of sleeve 7 is sleeved outside the cooling pipe 5, and the inner diameter of the sleeve 7 is equal to the outer diameter of the cooling pipe 5; the second through hole 72 is formed in the sleeve 7, the driving part 8 is further arranged on the machine shell 1, the driving part 8 drives the sleeve 7 to move along the axis of the cooling pipe 5, and the first through hole 6 and the second through hole 72 are driven to be communicated or staggered.

the sleeve 7 is composed of two half cylinders 71 symmetrically arranged along the axis of the cooling pipe 5, and the two half cylinders 71 are inserted into the outer wall of the cooling pipe 5 from the upper side and the lower side of the cooling pipe 5 along the height direction of the machine shell 1; two sides of openings at two ends of the upper half cylinder 71 are respectively connected with a connecting plate 73 in a rotating mode through pin shafts, the connecting plates 73 and the half cylinders 71 are arranged in the same radian, the lower ends of the connecting plates 73 and the lower half cylinders 71 are partially overlapped, slots 75 which are communicated with each other are formed in the connecting plates 73 and the lower half cylinders 71, and the connecting plates 73 and the lower half cylinders 71 are inserted into the two pins 74 through the pins 74, so that the two half cylinders 71 are fastened. In this embodiment, a circle of limiting rings 14 are fixed at two ends of the sleeve 7 of the cooling pipe 5, respectively, and when the pins 74 at two sides of the sleeve 7 are abutted against the two limiting rings 14, the second through hole 72 of the sleeve 7 is communicated with or dislocated from the first through hole 6 of the second cooling pipe 5.

Referring to fig. 3 and 5, the driving member 8 includes a hydraulic cylinder 81 and a push rod 82, the hydraulic cylinder 81 is disposed in parallel along the axis of the cooling pipe 5 and fixed to the inner wall of the housing 1, the push rod 82 is in a zigzag shape along the height direction of the housing 1, and the push rod 82 is fixed to the telescopic shaft of the hydraulic cylinder 81; the adjacent surfaces of the two half cylinders 71 are provided with mutually communicated grooves 10, the grooves 10 are matched with the lower ends of the push rods 82, so that when the two half cylinders 71 form the sleeve 7, the two half cylinders are inserted into the lower ends of the push rods 82 to realize the connection of the push rods 82 and the sleeve 7; the inner wall of the machine shell 1 is provided with a sliding groove 11 parallel to the axis of the cooling pipe 5, and the upper end of the push rod 82 is inserted in the sliding groove 11 and moves back and forth along the sliding groove 11; the hydraulic cylinder 81 is communicated with an externally connected hydraulic pump station through a pipeline, and the hydraulic pump station is arranged in a factory to drive various devices; the hydraulic pump station gives driving force to the hydraulic cylinder 81 to drive the telescopic rod of the hydraulic cylinder 81 to stretch, so that the sleeve 7 is driven to move back and forth.

Referring to fig. 4 and 5, in the present embodiment, a temperature sensor (not shown) is disposed in the casing 1, the temperature sensor is a thermocouple temperature sensor and is configured to detect a temperature change in the casing 1, and transmit a temperature signal to the control end, and transmit an on-off signal to the hydraulic cylinder 81 through the control end according to the temperature signal; when the temperature in the machine shell 1 is overhigh, the control end controls the hydraulic cylinder 81 to work to drive the sleeve 7 to displace, so that the second through hole 72 on the sleeve 7 is communicated with the first through hole 6 of the cooling pipe 5, cooling water is sprayed out through the first through hole 6 and the second through hole 72 and is sprayed into the machine shell 1, and spontaneous combustion combustible air is subjected to fire extinguishing work; when the temperature in the machine shell 1 drops, the control end controls the sleeve 7 to reset, and drives the second through hole 72 on the sleeve 7 to be staggered with the first through hole 6 on the cooling pipe 5, so that the first through hole 6 is sealed, and cooling water circulates in the cooling pipe 5 and the water chilling unit.

Referring to fig. 6, one side of the cover plate 4 is rotatably connected to the housing 1 through a rotating shaft (not shown), and the other side is limited on the housing 1 through a limiting member 9; the limiting piece 9 comprises a limiting rod 91, a limiting piece 94, limiting grooves 92, fixing grooves 95, sliding grooves 93, compression springs 96 and pull rods 97, the limiting rod 91 is vertically fixed at the lower end of the cover plate 4, two limiting grooves are arranged along the length direction of the cover plate 4, the limiting grooves 92 are arranged on the shell 1, the upper ends of the limiting grooves are communicated with the upper end of the shell, and two groups of limiting rods 91 are arranged correspondingly; two groups of sliding grooves 93 are arranged corresponding to the limiting grooves 92 and are respectively and vertically communicated with the limiting grooves 92, two limiting blocks 94 are arranged and are respectively inserted into the two sliding grooves 93 and move back and forth along the sliding grooves 93, a compression spring 96 is fixed between the limiting blocks 94 and one end of the sliding grooves 93, which are opposite to the limiting grooves 92, and the compression spring 96 drives the limiting blocks 94 to be partially inserted into the limiting grooves 92 and be retained in the sliding grooves 93; the pull rod 97 is fixed at one end of the limiting block 94 opposite to the limiting groove 92, and one end extends out of the casing 1; the limiting rods 91 are respectively provided with a fixing groove 95; when apron 4 and casing 1 upper end butt, gag lever post 91 is pegged graft in spacing groove 92 and fixed slot 95 and spout 93 intercommunication, and stopper 94 is under compression spring 96's elastic action, and the part is pegged graft and is stayed in spout 93 in fixed slot 95 is inside, realizes the spacing work to apron 4.

In this embodiment, the inclined plane is set to one section upper end that above-mentioned stopper 94 is in spacing groove 92, and when gag lever post 91 overturns to spacing groove 92 in, with stopper 94 inclined plane transmission, orders about stopper 94 under compression spring 96's elastic action, relative spout 93 displacement, and gag lever post 91 pegs graft the work in spacing groove 92.

Referring to fig. 2, in this embodiment, the ends of the two pull rods 97 outside the casing 1 are connected together by a connecting rod 98.

The two sides of the cover plate 4 along the length direction are respectively provided with a gas spring 12, and the upper end and the lower end of the gas spring 12 are respectively connected with the cover plate 4 and the machine shell 1 in a rotating way and give an upward overturning acting force to the cover plate 4.

The working principle of the embodiment is as follows: when combustible gas spontaneously ignites, the temperature in the machine shell 1 rises, the temperature sensor detects abnormal temperature, a signal is output to the control end, the control end outputs a signal to the hydraulic cylinder 81 to drive the axis of the sleeve 7 to move, so that the second through hole 72 of the sleeve 7 and the first through hole 6 on the cooling pipe 5 are enabled to spray cooling water into the machine shell 1 through the first through hole 6 and the second through hole 72, the fire extinguishing work is carried out in the machine shell 1, and after the fire extinguishing is successful, the hydraulic cylinder 81 drives the sleeve 7 to reset, so that the sleeve 7 continuously plays a role in sealing the first through hole 6; and then through drawing the connecting rod 98, the two limiting blocks 94 are driven to remove the limiting effect on the limiting rod 91, the cover plate 4 is automatically overturned and popped out under the elastic action of the air spring 12, the opening of the casing 1 is opened, and the worker can conveniently overhaul the inside of the casing 1.

Embodiment 3, an ultrasonic cleaning machine, including the explosion-proof system in embodiment 1 or embodiment 2, is provided with an ultrasonic cleaning tank in the casing 1, the transducer is installed in the casing 1, the electrical control element is installed in the distribution box 2; the electric control element outputs signals to the transducer, sound energy of the power ultrasonic frequency source is converted into mechanical vibration, ultrasonic waves are radiated to the cleaning agent through the cleaning tank wall, and therefore the product is cleaned.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (9)

1. An explosion-proof system, characterized by: including casing (1) that is used for bearing ultrasonic cleaning equipment, block terminal (2) that are used for bearing electrical control component, casing (1) upper end opening just articulates there is one to open and close open-ended apron (4), casing (1) is made by steel sheet an organic whole and inside formation washs the region, casing (1) wall thickness is 6mm-20mm, communicate through explosion-proof hose (3) between casing (1) and block terminal (2).

2. An explosion proof system according to claim 1, wherein: still be provided with circulative cooling mechanism in casing (1), circulative cooling mechanism is including setting up in casing (1) and being cooling tube (5) of continuous U type setting, and cooling tube (5) both ends communicate with external cooling water set respectively.

3. An explosion proof system according to claim 2, wherein: the utility model discloses a casing, including casing (1), cooling tube (5) have been seted up on one section of the top in being in casing (1) a plurality of through-holes (6), the cooling tube (5) overcoat has cup jointed sleeve pipe (7), sleeve pipe (7) are seted up on cooling tube (5) axis displacement and the outer wall displacement in-process and are opened and close two (72) of through-hole (6) intercommunication, be provided with driving piece (8) of driving sleeve pipe (7) axis displacement in casing (1), be provided with in casing (1) and detect the temperature sensor of casing (1) interior temperature and be connected and automatic start and stop driving piece (8) with driving piece (8).

4. An explosion proof system according to claim 3, wherein: the sleeve (7) comprises two half cylinders (71) which are symmetrically arranged along the axis of the cooling pipe (5), the two sides of the opening of the end surface of one half cylinder (71) are respectively and rotatably connected with a connecting plate (73), the connecting plate (73) and the other half cylinder (71) are correspondingly provided with slots (75) which are communicated with each other, and a plug pin (74) is inserted in each slot (75).

5. An explosion proof system according to claim 4, wherein: the driving piece (8) comprises a hydraulic cylinder (81) and a push rod (82), wherein the hydraulic cylinder (81) and the push rod (82) are arranged in parallel along the axis of the sleeve (7) and fixedly connected onto a telescopic rod of the hydraulic cylinder (81), the push rod (82) is Z-shaped, two grooves (10) matched with the lower end of the push rod (82) are formed in the adjacent surfaces of the semi-cylinders (71), and a sliding groove (11) for inserting and linearly displacing the upper end of the push rod (82) is formed in the inner wall of the casing (1) in parallel along the axis of the sleeve (.

6. An explosion proof system according to claim 1, wherein: one side of the cover plate (4) is rotatably connected to the casing (1), the other side is limited on the casing (1) through a limiting piece (9), the limiting piece (9) comprises two limiting rods (91) fixed at the lower end of the casing (1), a limiting groove (92) correspondingly arranged on the casing (1) and used for the insertion of the limiting rods (91), a sliding groove (93) vertically communicated with the limiting groove (92), and a limiting piece (94) connected in the sliding groove (93) in a sliding way, the limiting rod (91) is provided with a fixing groove (95) communicated with the sliding groove (93) in the turning process, a compression spring (96) for driving the part of the limit block (94) to be inserted in the fixed groove (95) is arranged between the limit block (94) and the sliding groove (93), one end of the limiting block (94) facing the compression spring (96) is provided with a pull rod (97) extending to the outer side of the machine shell (1); the upper end of one section of the limiting block (94) in the limiting groove (92) is provided with an inclined plane.

7. An explosion proof system according to claim 6, wherein: and air springs (12) are respectively arranged on two sides of the vertical rotating point of the cover plate (4), and two ends of each air spring (12) are respectively rotatably connected with the casing (1) and the cover plate (4).

8. An explosion proof system according to claim 6, wherein: and a sealing gasket (13) is also arranged between the cover plate (4) and the shell (1).

9. An ultrasonic cleaner, characterized in that: including the explosion proof system of any one of claims 1-8.