CN107234007B

CN107234007B - Automatic fault detection micro-bubble gun and detection and control method

Info

Publication number: CN107234007B
Application number: CN201710488079.0A
Authority: CN
Inventors: 李安迎; 周介凡
Original assignee: Hunan Zhong Gong Mining Engineering Technology Co ltd
Current assignee: Hunan Zhong Gong Mining Engineering Technology Co ltd
Priority date: 2017-06-23
Filing date: 2017-06-23
Publication date: 2022-11-01
Anticipated expiration: 2037-06-23
Also published as: CN107234007A

Abstract

An automatic fault detection micro-bubble gun and a detection and control method thereof comprise a gun body, wherein the gun body comprises an outer tube, an inner rod and a diaphragm chamber, the inner rod is arranged in the outer tube, a plug at the front end of the inner rod seals a nozzle at the front end of the outer tube, a gap between the inner rod and the outer tube forms an air flow channel, the rear end of the outer tube is hermetically arranged at the front end of the diaphragm chamber, a rear inner tube communicated with high-pressure gas is hermetically arranged at the rear end of the diaphragm chamber, an electronic control box is arranged in the diaphragm chamber, an air outlet of the rear inner tube is communicated with an air inlet of the air flow channel through the electronic control box, and an alarm device powered by the electronic control box is arranged on the diaphragm chamber.

Description

Automatic fault detection micro-bubble gun and detection and control method

Technical Field

The invention belongs to mineral processing equipment, and particularly relates to an automatic fault detection micro-bubble gun and a detection and control method.

Background

The microbubble gun (also known as a microbubble generator) is one of the core components of the flotation column, and directly influences the quality of the flotation operation index. The microbubble gun acts on ore pulp through high-speed injection formed by high-pressure air to split the ore pulp to form tiny bubbles, so that the ore pulp can be driven to flow at a high speed at a nozzle, the ore pulp flowing at the high speed can cause abrasion to the nozzle, and in addition, the cavitation phenomenon formed by high-speed air flow causes the nozzle of the microbubble gun to be easily damaged, so that the microbubble gun can not normally plug the nozzle when the machine is stopped, the ore pulp penetrates, and the blockage of the microbubble gun is caused. In the actual production, various factors can cause the blockage phenomenon, and the normal work of the micro-bubble gun is influenced. The micro-bubble gun is directly inserted into the ore pulp, so that the working state of the micro-bubble gun is difficult to grasp visually, the on-site worker is difficult to find out the micro-bubble gun with a fault in time, when the ore dressing index is found to be abnormal, the loss is quite large, and even if the index is found to be abnormal, the problem of the micro-bubble gun cannot be determined, and even if the problem of the micro-bubble gun is determined, the worker is difficult to find out the problem point from dozens of or hundreds of micro-bubble guns.

Disclosure of Invention

The invention overcomes the defects of the technology, and provides the automatic fault detection microbubble gun and the detection and control method, which can timely replace the faulty microbubble gun, avoid the phenomena of insufficient inflation and uneven inflation of the flotation column, and continuously, effectively and stably control the flotation indexes so as to reduce the influence of the fault of the microbubble gun on the flotation column indexes.

A method for automatically detecting the failure of a micro-bubble gun includes such steps as setting a pressure and airflow detecting sensor in the micro-bubble gun, setting an alarm unit outside the micro-bubble gun, and controlling the alarm unit to alarm when the sensor detects that the pressure in the micro-bubble gun is higher than a standard atmospheric pressure but no airflow is generated.

An automatic fault detection micro-bubble gun comprises a gun body, wherein the gun body comprises an outer tube, an inner rod and a diaphragm chamber, the inner rod is installed in the outer tube, a plug at the front end of the inner rod seals a nozzle at the front end of the outer tube, a gap between the inner rod and the outer tube forms an airflow channel, the rear end of the outer tube is installed at the front end of the diaphragm chamber in a sealing mode, a rear inner tube communicated with high-pressure gas is installed at the rear end of the diaphragm chamber in a sealing mode, an electronic control box is installed in the diaphragm chamber, a gas outlet of the rear inner tube is communicated with a gas inlet of the airflow channel through the electronic control box, and an alarm device controlled by the electronic control box is arranged on the diaphragm chamber;

the electronic control box is internally provided with a rear outer sleeve and a front outer sleeve, a closed air guide cavity is formed inside the rear outer sleeve and the front outer sleeve after the rear outer sleeve and the front outer sleeve are connected, an air inlet hole is formed in the front outer sleeve, guide grooves which are used for communicating the air guide cavity with the outside and are distributed along the axial direction are formed in the upper side and the lower side of the rear outer sleeve, an air outlet of the rear inner tube is communicated with the air flow channel sequentially through the air inlet hole, the air guide cavity, the rear inner sleeve and the front inner sleeve which are connected with the inner wall of the air guide cavity in a sliding mode, a first switch, a battery and a deflector rod are fixed in the rear inner sleeve, a second switch is fixed in the front inner sleeve, the battery, the first switch, the second switch and an alarm device are connected through wires to form a series circuit, two ends of the deflector rod extend out of the guide grooves, a step for limiting the deflector rod is arranged in the diaphragm cabin, the rear outer sleeve and the front outer sleeve are provided with a switch touch piece which corresponds to the first switch and a second switch, a switch touch piece is arranged in a position, the rear outer sleeve and the front outer sleeve and the second switch touch piece are respectively pressed towards the opposite direction, so that the second switch touch piece does not touch the inner sleeve and the front switch contact piece tightly touch the inner sleeve and the front spring tightly touch the inner sleeve, and the deflector rod contact piece tightly. By adopting the structure, only when the first switch and the second switch of the electronic control box are both in a closed state, the circuit is switched on, so that the alarm device gives an alarm to remind, and a basis is provided for a worker to find, overhaul and replace a faulty micro-bubble gun.

Preferably, the alarm device is an indicator light mounted on the outer side of the diaphragm chamber.

Preferably, the diaphragm cabin comprises a diaphragm front sleeve and a diaphragm rear sleeve, an installation chamber is formed in the diaphragm front sleeve and the diaphragm rear sleeve after the diaphragm front sleeve and the diaphragm rear sleeve are connected in a sealing mode, an electronic control box, a diaphragm front pressing plate, a diaphragm rear pressing plate, a first spring, a spring pressing plate and an adjusting screw rod are sequentially arranged in the installation chamber from the front end to the rear end, the diaphragm front pressing plate, the diaphragm rear pressing plate, the first spring, the spring pressing plate and the adjusting screw rod are sleeved on the rear inner tube in a sealing mode, the diaphragm is installed on the rear inner tube in a sealing mode through the diaphragm front pressing plate and the diaphragm rear pressing plate and linked with the rear inner tube, the first spring is installed between the diaphragm rear pressing plate and the spring pressing plate, the spring pressing plate is connected with the adjusting screw rod, the adjusting screw rod is in threaded connection with the diaphragm rear sleeve, one end of the electronic control box is connected with the rear inner tube in a sealing mode and tightly pressed on the diaphragm front pressing plate, and the other end of the electronic control box is fixedly connected with the inner rod.

Preferably, a through hole is formed in the center of the diaphragm, raised edge rings are designed on the inner edge and the outer edge of the diaphragm, annular grooves for conveniently clamping the outer edge of the diaphragm are formed in the binding surfaces of the front diaphragm sleeve and the rear diaphragm sleeve, and the inner edge of the diaphragm, the front diaphragm pressing piece and the rear diaphragm pressing piece are clamped to form sealing.

Preferably, a profiling step for limiting the backward moving distance of the diaphragm is arranged on the diaphragm rear sleeve.

A control method of an automatic fault detection micro-bubble gun is used for controlling the micro-bubble gun, and specifically comprises the following steps:

a. the non-working state:

under the action of a second spring, the front inner sleeve is tightly pressed with the front outer sleeve, the second switch is contacted with the corresponding switch touching piece, the deflector rod on the electronic control box is abutted against the step of the diaphragm front sleeve for limiting, the rear inner sleeve is not contacted with the rear outer sleeve, so that the first switch is not contacted with the switch touching piece, the first switch is in an off state, at the moment, the second switch is in a closed state, but the whole circuit is in the off state, and the indicating lamp cannot emit light;

b. and (4) a normal working state:

high-pressure air enters from the rear inner tube, pushes the front inner sleeve in the electronic control box away through the air inlet and enters the air guide cavity in the electronic control box, so that the second switch is pushed away from the switch touch piece and is in a disconnected state; then high-pressure air passes through the air guide cavity and enters the air flow channel from the guide groove, meanwhile, the diaphragm, the rear inner tube, the electronic control box and the plug are integrally moved backwards due to the increase of pressure in the micro-bubble gun, so that the air flows out of the nozzle, effective air flow is formed in the micro-bubble gun, the deflector rod can leave a step on the front sleeve of the diaphragm, the rear inner sleeve and the rear outer sleeve are tightly pressed under the action of the second spring, so that the first switch is contacted with the switch touch piece, at the moment, the first switch is in a closed state, but the whole circuit is still in an open state due to the disconnection of the second switch in the circuit, and the indicator lamp can not emit light;

c. a fault state:

high-pressure air enters from the rear inner tube and pushes the front inner sleeve in the electronic control box away through the air inlet hole, so that the second switch is pushed away from the switch touch piece and is in a disconnected state; meanwhile, the diaphragm, the rear inner tube and the electronic control box integrally move backwards due to the increase of the pressure in the micro-bubble gun, the deflector rod leaves the step on the front sleeve of the diaphragm, the rear inner sleeve and the rear outer sleeve are tightly pressed under the action of the second spring, so that the first switch is contacted with the switch touch piece and is in a closed state,

because the nozzle is blocked, air can not flow out of the nozzle, effective air flow can not be formed in the micro-bubble gun, the front inner sleeve and the front outer sleeve are pressed together under the action of the second spring, and therefore the second switch is contacted with the corresponding switch touch piece and is also closed; at the moment, the first switch and the second switch in the circuit are both in a closed state, the circuit is switched on, the indicator lamp emits light, and the fault alarm is completed.

In conclusion, the invention ensures that the failure of the micro-bubble gun can be found in time, and the failure micro-bubble gun can be replaced in time, thereby avoiding the phenomena of insufficient inflation and uneven inflation of the flotation column, continuously, effectively and stably controlling the flotation index, reducing the influence of the failure of the micro-bubble gun on the flotation column index and ensuring the economic benefit of a factory.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the electronic control box of the present invention.

Fig. 3 is a schematic structural diagram of the electronic control box of the present invention in an inoperative state.

Fig. 4 is a schematic structural diagram of the electronic control box in a normal working state.

Fig. 5 is a schematic structural diagram of the electronic control box in a fault state according to the present invention.

In the attached drawing, 1, an outer tube, 2, a diaphragm front sleeve, 3, a diaphragm rear sleeve, 4, a diaphragm front pressing sheet, 5, a diaphragm rear pressing sheet, 6, a spring pressing sheet, 7, an adjusting screw rod, 8, a rear inner tube, 9, an inner rod, 10, a triangular bushing, 11, a plug, 12, a nozzle jacket, 13, a wear-resistant nozzle, 14, a diaphragm, 15, a first spring, 16, an electronic control box, 17, an air pipe joint, 18, an indicator light, 19, a step and 20, bolts are arranged.

Detailed Description

The technical content of the present invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1, the automatic failure detection micro-bubble gun has the advantages that the front end of an outer tube 1 is hermetically connected with a nozzle jacket 12, a wear-resistant nozzle 13 is hermetically bonded in the nozzle jacket 12, a triangular bushing 10 is sleeved in the front end of the outer tube 1 and has a centering effect on an inner rod 9, the rear end of the inner rod 9 is connected with an electronic control box 16, the front end of the inner rod 9 is connected with a plug 11, and the plug 11 is tightly propped against the wear-resistant nozzle 13 to form a sealing effect; the rear end of the outer tube 1 is hermetically connected with the diaphragm front sleeve 2, the diaphragm front sleeve 2 is connected with the diaphragm rear sleeve 3 through a plurality of bolts 20, annular grooves are formed in the binding surfaces of the diaphragm front sleeve 2 and the diaphragm rear sleeve 3 and used for clamping the outer edge of the fixed diaphragm 14, and a profiling step used for being attached to the diaphragm 14 is arranged on the diaphragm rear sleeve 3; the center of the diaphragm 14 is provided with a hole which is tightly sleeved on the rear inner tube 8, the inner edge and the outer edge of the diaphragm 14 are both provided with a raised edge ring, the outer edge of the raised edge ring can be clamped in an annular groove of the jointing surface of the diaphragm front sleeve 2 and the diaphragm rear sleeve 3 to form a seal, and the inner edge is clamped with the diaphragm front pressing sheet 4 and the diaphragm rear pressing sheet 5 to form a seal; the first spring 15 is arranged in the diaphragm rear sleeve 3, one end of the first spring is tightly propped against the diaphragm rear pressing sheet 5, the other end of the first spring is tightly propped against the spring pressing sheet 6, and the compression amount of the spring can be adjusted by rotating the adjusting screw 7 on the diaphragm rear sleeve 3 so as to adjust the pressure of the first spring 15; the rear end of the rear inner tube 8 is connected with a gas tube connector 17, the front end is communicated with an electronic control box 16, and an indicator light 18 is arranged on the diaphragm front sleeve 2.

As shown in fig. 2, the electronic control box 16 is formed by connecting a rear outer sleeve 112 and a front outer sleeve 113 by screw threads, an air guide cavity is formed inside the rear outer sleeve after the connection, an air inlet hole 111 is formed on the front outer sleeve 113, guide grooves 106 which are axially arranged and used for communicating the air guide cavity with the outside are formed on the upper side and the lower side of the rear outer sleeve 112, the air inlet hole is communicated with an air flow channel through the air guide cavity and the guide grooves 106, a rear inner sleeve 115 and a front inner sleeve 114 which are connected with the inner wall of the air guide cavity in a sliding manner are installed in the air guide cavity, a first switch 102, a battery 101 and a deflector rod 116 are fixed in the rear inner sleeve 115, a second switch 103 is fixed in the front inner sleeve 114, in this example, the first switch 102 and the second switch 103 are respectively arranged at the front end of the rear inner sleeve 115 and the rear end of the front inner sleeve 114 along the moving direction, so that the first switch 102 and the second switch 103 respectively face the front inner walls of the air guide cavity in the rear outer sleeve 112 and the front outer sleeve 113, two ends of the shifting rod 116 extend out of the guide groove 106, a step 19 which corresponds to the shifting rod 116 and is used for limiting the shifting rod 116 is arranged in the diaphragm front sleeve 2, a switch touch piece 105 which controls the opening and closing of the corresponding switch is arranged at the position where the rear outer sleeve 112 and the front outer sleeve 113 correspond to the first switch 102 and the second switch 103, the rear inner sleeve 115 and the front inner sleeve 114 are connected through a second spring 104, the second spring 104 moves the rear inner sleeve 115 and the front inner sleeve 114 towards opposite directions respectively, so that the first switch 102 and the second switch 103 are pressed towards the switch touch piece, in the non-working state, the first switch 102 does not contact with the switch touch piece due to the fact that the shifting rod 116 is limited on the step 19, the second switch 103 is pressed on the corresponding switch touch piece 105 under the action of the second spring 104, the front end face of the front outer sleeve 114 presses the inner side of the front outer sleeve 113 to seal the air inlet hole, the second spring 104 is used to apply pressure to both ends, thereby forcing the first switch 102 and the second switch 103 to be in a closed state. The battery 101, the first switch 102, the second switch 103 and the indicator light 18 are connected by wires to form a series circuit, and the indicator light can be lighted only when the first switch 102 and the second switch 103 are closed together.

Under the non-working state, because no high-pressure air is connected, the pressure intensity on two sides of the diaphragm 14 in the micro-bubble gun is equal, the diaphragm 14 can bulge forwards under the action of the second spring 104 to be in the initial state, at the moment, the plug 11 is tightly pressed on the wear-resistant nozzle 13 to form sealing, and the micro-bubble gun is in the closed state.

When the micro bubble gun is in work, high-pressure air is connected from the A position of the air pipe joint 17, flows out along the rear inner pipe 8 through the electronic control box 16 connected to the front end of the rear inner pipe, enters an inner cavity of the micro bubble gun (comprising the diaphragm 14, the diaphragm front sleeve 2, the outer pipe 3 and the like), the diaphragm 14 can bulge backwards along with the rapid increase of the pressure of the inner cavity of the micro bubble gun, and can move backwards together with the diaphragm rear pressing sheet 5 overcoming the pressure of the first spring 15 to be attached to the profiling step position on the diaphragm rear sleeve 3, meanwhile, the rear inner pipe 8 and the electronic control box 16 connected with the rear inner pipe can also move backwards, the inner rod 9 and the plug 11 connected with the rear inner pipe can also move backwards along with the inner rod, so that the plug 11 is separated from the wear-resistant nozzle 13, and the air can be sprayed out from the inner hole K position of the nozzle 13.

As shown in fig. 3, the first case, the non-operating state: that is, in the initial state, the lever 116 on the electronic control box 16 will abut against the step on the diaphragm front cover 2, thereby pressing the second spring 104, and pulling the rear inner cover 115 away from the bottom of the rear outer cover 112 (in this example, the bottom of the rear outer cover 112 refers to the inner side surface of the rear outer cover 112 along the axial direction, and the bottom of the rear outer cover 112 corresponds to the switch touch piece corresponding to the first switch 102), thereby releasing the first switch 102 to be in the open state, and at this time, the second switch 103 is in the closed state, but the whole circuit is in the open state, and the indicator light 18 will not emit light.

As illustrated in fig. 4, the second case, normal operating state: when high-pressure air enters from the rear inner tube 8, airflow with a certain speed is formed, and the high-pressure air quickly enters the electronic control box 16 through a position B (an air inlet of the electronic control box), the front inner sleeve 114 in the electronic control box 16 is pushed open, so that the second switch 103 is driven to leave the switch touch piece (in the embodiment, the switch touch piece corresponding to the second switch 103 in the front outer sleeve 113 is a push rod arranged on the air inlet 111 of the front outer sleeve 113, and the push rod cannot shield the air inlet), and the second switch 103 is in a disconnected state; meanwhile, when the diaphragm 14, the rear inner tube 8, the electronic control box 16 and the like move backwards integrally due to the increase of the pressure in the micro bubble gun, the shift lever 116 leaves the step on the front diaphragm sleeve 2, and pushes the rear inner sleeve 115 and the bottom of the rear outer sleeve 112 to be pressed tightly under the action of the second spring 104, so that the first switch 102 is pressed down and closed; at this time, the second switch 103 is turned off in the circuit, so that the whole circuit is still in an off state, and the indicator light does not emit light.

As shown in fig. 5, the third case, a failure state (i.e., the microbubble gun is clogged in the used state): in the using state, high-pressure air enters the micro-bubble gun, so the first switch 102 is closed (as in the second case), but because the nozzle is blocked, air cannot flow out of the nozzle, no effective air flow is formed in the micro-bubble gun, and under the action of the second spring 104, the front inner sleeve 114 and the front outer sleeve 113 are pushed to be tightly pressed, so that the second switch 103 is triggered and pressed to be closed; at this time, the first switch 102 and the second switch 103 in the circuit are both in a closed state, the circuit is connected, the indicator light 18 emits light, and the fault alarm is completed.

The core of the automatic fault detection micro-bubble gun is a micro-bubble gun detection logic method, namely, the micro-bubble gun can be regarded as a fault when air pressure exists in the micro-bubble gun and no air flow exists.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an automatic fault detection microbubble rifle, includes the rifle body, the rifle body includes outer tube (1), interior pole (9), diaphragm storehouse, interior pole (9) are installed in outer tube (1), the spout of the sealed outer tube (1) front end of end cap (11) of interior pole (9) front end, the clearance between interior pole (9) and outer tube (1) forms airflow channel, outer tube (1) rear end seal installation is at the front end in diaphragm storehouse, interior pole (9) are installed and are linked with the diaphragm in the diaphragm storehouse, the rear end seal installation in diaphragm storehouse has back inner tube (8) with the high-pressure gas intercommunication, its characterized in that: an electronic control box (16) is installed in the diaphragm chamber, the air outlet of the rear inner tube (8) is communicated with the airflow channel through the electronic control box (16), and an alarm device controlled by the electronic control box (16) is arranged on the diaphragm chamber;

a rear outer sleeve (112) and a front outer sleeve (113) are arranged in the electronic control box (16), a gas guide cavity is formed in the rear outer sleeve (112) and the front outer sleeve (113) after the rear outer sleeve (112) and the front outer sleeve (113) are connected, a gas inlet hole (111) is formed in the front outer sleeve (113), a guide groove (106) which is used for communicating the gas guide cavity with the outside and is distributed along the axial direction is formed in the side wall of the rear outer sleeve (112), a gas outlet of the rear inner tube (8) is communicated with the gas flow channel sequentially through the gas inlet hole (111) in the front outer sleeve (113), the gas guide cavity and the guide groove (106), a rear inner sleeve (115) and a front inner sleeve (114) which are connected with the inner wall of the gas guide cavity in a sliding mode are arranged in the gas guide cavity, a first switch (102), a battery (101) and a deflector rod (116) are fixed in the rear inner sleeve (115), a second switch (103) is fixed in the front inner sleeve (114), the battery (101), the first switch (102), the second switch (103) and an alarm device are connected through wires to form a series circuit, two ends of the deflector rod (116) extend out of the guide groove, a position of the deflector rod bin is provided with a contact piece (116), a position which corresponds to a limit switch (19) and a position of the deflector rod (105) which is arranged in the front outer sleeve (112) and a switch (105) and a switch, and a position of the deflector rod (105) which is used for controlling position of the switch (112) and a switch which is arranged on the deflector rod (105), the rear inner sleeve (115) and the front inner sleeve (114) are connected through a second spring (104), the second spring (104) enables the rear inner sleeve (115) and the front inner sleeve (114) to move towards opposite directions respectively, so that the first switch (102) and the second switch (103) are pressed towards the switch touch piece (105), in a non-working state, the first switch (102) enables the first switch (102) and the corresponding switch touch piece to be out of contact due to the fact that the shifting rod (116) is limited on the step, the second switch (103) is pressed on the corresponding switch touch piece under the action of the second spring, and the front end face of the front inner sleeve (114) presses the inner side face of the front outer sleeve (113) to seal the air inlet hole.

2. The automatic failure detection micro-bubble gun of claim 1, wherein: the alarm device is an indicator light (18) arranged on the outer side of the diaphragm chamber.

3. The automatic failure detection micro-bubble gun of claim 1 or 2, wherein: the diaphragm cabin comprises a diaphragm front sleeve (2) and a diaphragm rear sleeve (3), an installation chamber is formed in the diaphragm front sleeve (2) and the diaphragm rear sleeve (3) after the diaphragm front sleeve (2) and the diaphragm rear sleeve (3) are connected in a sealing mode, an electronic control box (16) and a diaphragm front pressing sheet (4), a diaphragm (14), a diaphragm rear pressing sheet (5), a first spring (15), a spring pressing sheet (6) and an adjusting screw (7) are sequentially arranged in the installation chamber from the front end to the rear end, the outer edge of the diaphragm (14) is fixed between the diaphragm front sleeve (2) and the diaphragm rear sleeve (3) in a sealing mode, the diaphragm (14) is installed on the rear inner tube (8) through the diaphragm front pressing sheet (4) and the diaphragm rear pressing sheet (5) in a sealing mode and is linked with the rear inner tube (8), the first spring (15) is installed between the diaphragm rear pressing sheet (5) and the spring pressing sheet (6), the spring pressing sheet (6) is connected with the adjusting screw (7), the adjusting screw (7) is connected with the diaphragm rear sleeve (3) in a threaded mode, one end of the electronic control box (16) is connected with the rear pressing sheet (8) in a sealing mode, and is fixedly connected with the inner tube (4) in a pressing sheet, and the front inner rod (4) in a pressing sheet.

4. The automatic failure detection micro-bubble gun of claim 3, wherein: the diaphragm sealing structure is characterized in that a through hole is formed in the center of the diaphragm (14), raised edge rings are designed on the inner edge and the outer edge of the diaphragm (14), annular grooves for conveniently clamping the outer edge of the diaphragm are formed in the binding faces of the front diaphragm sleeve (2) and the rear diaphragm sleeve (3), and the inner edge of the diaphragm is clamped with the front diaphragm pressing piece (4) and the rear diaphragm pressing piece (5) to form sealing.

5. The automatic failure detection micro-bubble gun of claim 4, wherein: the diaphragm rear sleeve (3) is provided with a profiling step for limiting the backward moving distance of the diaphragm (14).

6. A control method of an automatic failure detection micro-bubble gun for the micro-bubble gun of claim 5, characterized in that: the method specifically comprises the following steps:

a. the non-working state:

under the action of a second spring (104), a front inner sleeve (114) is tightly pressed with a front outer sleeve (113), a second switch (103) is contacted with a corresponding switch touch piece, a deflector rod (116) on an electronic control box (16) abuts against a step of a diaphragm front sleeve (2) for limiting, a rear inner sleeve (115) is not contacted with the bottom of a rear outer sleeve (112), so that a first switch (102) is not contacted with the switch touch piece, the first switch (102) is in an off state, at the moment, the second switch (103) is in a closed state, but the whole circuit is in an off state, and an indicator light (18) cannot emit light;

b. and (3) normal working state:

high-pressure air enters from the rear inner tube (8), pushes a front inner sleeve (114) in the electronic control box (16) away through the air inlet hole (111), and enters an air guide cavity in the electronic control box (16), so that the second switch (103) is pushed away from the switch touch piece, and the second switch (103) is in a disconnected state; then high-pressure air passes through the air guide cavity and enters the air flow channel from the guide groove, meanwhile, the diaphragm (14), the rear inner tube (8), the electronic control box (16) and the plug (11) are integrally moved backwards due to the increase of pressure in the micro-bubble gun, so that the air flows out of the nozzle, effective air flow is formed in the micro-bubble gun, the shift lever (116) can leave a step on the diaphragm front sleeve (2), the rear inner sleeve (115) is tightly pressed with the bottom of the rear outer sleeve (112) under the action of the second spring (104), so that the first switch (102) is contacted with the switch touch piece, at the moment, the first switch (102) is in a closed state, but the second switch (103) is disconnected in the circuit, the whole circuit is still in an open state, and the indicator lamp cannot emit light;

c. a fault state:

high-pressure air enters from the rear inner tube (8) and pushes a front inner sleeve (114) in the electronic control box (16) away through the air inlet hole (111), so that the second switch (103) is pushed away from the switch touch piece, and the second switch (103) is in a disconnected state; meanwhile, the diaphragm (14), the rear inner tube (8) and the electronic control box (16) integrally move backwards due to the increase of pressure in the micro-bubble gun, at the moment, the deflector rod (116) leaves a step on the front diaphragm sleeve (2), under the action of the second spring (104), the rear inner sleeve (115) is tightly pressed with the bottom of the rear outer sleeve (112), so that the first switch (102) is contacted with the switch touch piece, the first switch (102) is in a closed state,

because the nozzle is blocked, air cannot flow out of the nozzle, effective air flow cannot be formed in the micro-bubble gun, the front inner sleeve (114) and the bottom of the front outer sleeve (113) are pressed together under the action of the second spring (104), and therefore the second switch (103) is contacted with the corresponding switch touching piece and the second switch (103) is closed; at the moment, the first switch (102) and the second switch (103) in the circuit are both in a closed state, the circuit is switched on, the indicator lamp (18) emits light, and the fault alarm is completed.