CN110685892A

CN110685892A - Diaphragm vacuum pump

Info

Publication number: CN110685892A
Application number: CN201911056946.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Tang Yexi
Current assignee: Guangdong Fushelai Electric Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-01-14
Anticipated expiration: 2039-10-31
Also published as: CN110685892B

Abstract

The invention belongs to the technical field of vacuum pumps, and particularly relates to a diaphragm vacuum pump which comprises a shell, a cylinder and a protection box, wherein the shell is provided with a cylinder hole; a cavity is formed in the shell; the upper surface of the cavity is fixedly connected with an air cylinder; an output shaft of the air cylinder is fixedly connected with a moving column, and the lower surface of the moving column is fixedly connected with a diaphragm; a protection box is arranged at the right side surface of the cavity; the invention effectively solves the problems that when the device is directly vacuumized by the diaphragm vacuum pump, liquid or vapor in the device is easy to be sucked into the diaphragm vacuum pump, and meanwhile, if the device is at high temperature, hot air in the device is directly pumped, so that the membrane in the diaphragm vacuum pump is easy to damage, and the like; the service life of the diaphragm vacuum pump is effectively prolonged.

Description

Diaphragm vacuum pump

Technical Field

The invention belongs to the technical field of vacuum pumps, and particularly relates to a diaphragm vacuum pump.

Background

The diaphragm vacuum pump is advanced in design, high in working efficiency and long in service life, is a replacement product integrating high and new technologies, is mainly applied to the fields of medical and medical product analysis, fine chemical engineering, biochemical pharmacy, food inspection, public security criminal investigation technology and the like, is a product matched with a precise chromatographic instrument, and is also one of necessary equipment in a laboratory.

In the prior art, a diaphragm vacuum pump directly pumps air for a device needing to be vacuumized, so that liquid or water vapor is easy to enter, meanwhile, if hot air in the device is directly pumped under the condition of high temperature, the problem of aging and damage of a diaphragm inside the diaphragm vacuum pump is easy to cause is solved, if corrosive liquid directly enters, elements such as a diaphragm or a sealing element in the diaphragm vacuum pump are corroded, so that the service life of the diaphragm vacuum pump is reduced or damaged, the prior art keeps good ventilation in the handling mode of the problems, so as to be beneficial to heat dissipation and prolong the service life, a small amount of liquid is carelessly pumped into the pump in use, staff is required to immediately close the diaphragm vacuum pump and immediately pull out a pump pipe connected with the diaphragm vacuum pump, so that the air pumped by the diaphragm vacuum pump is evacuated for at least 0.5-1h to be evacuated, and if a large amount of liquid is carelessly pumped into, and timely repair is required.

Disclosure of Invention

In order to make up for the defects of the prior art, and solve the problems that in the prior art, a diaphragm vacuum pump directly pumps air to a device needing vacuum pumping, liquid or water vapor is easy to enter, meanwhile, if the device is internally provided with high temperature, hot air in the device is directly pumped, the diaphragm inside the diaphragm vacuum pump is easy to age and damage, and the like, and if corrosive liquid directly enters, elements such as the diaphragm or a sealing element in the diaphragm vacuum pump are corroded, so that the service life of the diaphragm vacuum pump is reduced or damaged, and the like.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a diaphragm vacuum pump which comprises a shell, a cylinder and a protection box, wherein the shell is provided with a plurality of grooves; the shell is designed into a cuboid structure; a cavity is formed in the shell; the front wall, the rear wall and the right wall of the shell are all provided with rectangular holes which are uniformly distributed; the upper surface of the cavity is fixedly connected with an air cylinder; an output shaft of the cylinder is fixedly connected with a moving column; an upper arc disc is arranged at the lower position of the air cylinder, and the moving column is connected to the upper arc disc in a vertically sliding mode; a lower arc disc is arranged below the upper arc disc; a diaphragm is fixedly connected between the upper arc disc and the lower arc disc, and the center position of the diaphragm is fixedly connected with the moving column; the lower surface of the lower arc disc is provided with a through hole; a pipeline is fixedly connected in the through hole; the left side position of the pipeline is fixedly connected with an air outlet valve; an air inlet valve is fixedly connected to the right side of the pipeline; a protection box is fixedly connected to the right side of the air inlet valve inside the cavity; the inside of the protection box is provided with a pore plate, and the pore plate divides the inside of the protection box into a left cavity and a right cavity; the surface of the pore plate is provided with air guide holes which are uniformly distributed and can conduct the left cavity and the right cavity; an air inlet is formed in the side surface of the right side of the protection box; the right side surface of the protection box is fixedly connected with an air inlet joint at the position of an air inlet hole; a first drainage hole is formed in the lower surface of the protection box between the pore plate and the air inlet hole, and a first rubber ball is arranged in the first drainage hole; when the device to be vacuumized comprises liquid, if the operation is improper, the liquid is easy to be sucked into the diaphragm vacuum pump, and the damage of the diaphragm vacuum pump is easily caused, therefore, the protection box is arranged at the right side position of the air inlet valve, the gas needs to firstly pass through the protection box before entering the air inlet valve through the air inlet joint, and the pore plate is arranged in the protection box, the surface of the pore plate is provided with the air guide holes which are uniformly distributed, when gas passes through the protection box, the gas can pass through the air guide holes of the pore plate, but a small amount of sucked liquid can be blocked by the pore plate, and then the liquid enters the first exhaust hole, and the first rubber ball in the first exhaust hole stops blocking the first exhaust hole due to the buoyancy of water, so that the liquid can be smoothly guided out; when the device contains a large amount of water vapor, the water vapor is easily led into the pipeline along with the gas, under the long-time working condition, the water vapor can be accumulated in the diaphragm vacuum pump, the service life of the vacuum pump is influenced or the vacuum pump is damaged, through the arrangement of the pore plate, when the gas passes through the gas guide hole on the pore plate, the water vapor contained in the gas can be condensed due to impacting the pore plate and continuously gathers on the right side surface of the pore plate to form liquid drops and flow into the first exhaust hole, the separation of the water vapor and the air is realized, the pipeline for the water vapor to enter the inside of the diaphragm vacuum pump is reduced, meanwhile, the temperature of the hot air can be reduced by impacting the pore plate, the aging phenomenon of the diaphragm due to high temperature is further protected, the diaphragm vacuum pump directly vacuumizes the device in the prior art, and the liquid or the water vapor is easy, simultaneously if the device is interior under the condition of high temperature, the hot-air in the direct extraction device causes diaphragm vacuum pump inside diaphragm to damage scheduling problem easily, and the separation effect of orifice plate has also avoided corrosive liquid to get into, causes the ageing corruption of diaphragm, the effectual life who improves diaphragm vacuum pump.

Preferably, the air inlet holes are internally provided with wave panels which are uniformly distributed; the during operation, when the high-temperature gas in the device is directly inhaled in the diaphragm vacuum pump, although the cooling of the passageway in orifice plate and the guard box, but because the route of gas process is shorter, the extraction high-temperature gas of continuation, the cooling effect of orifice plate is limited, consequently through evenly arranging the wave panel in the inlet port on orifice plate right side, the effectual circulation route that has increased gas, can play lasting cooling effect to high-temperature gas, the time of the operation under the diaphragm vacuum pump high-temperature gas condition has been increased, moreover, the steam generator is simple in structure, and manual operation is not needed.

Preferably, an impact baffle is fixedly connected between the first drainage hole and the wave panel inside the protection box, and the left and right side spaces of the impact baffle are communicated with the upper position of the impact baffle; a second drain hole is formed in the lower surface of the protection box between the impact baffle and the wave panel, and a second rubber ball is arranged in the second drain hole; when the vacuum pump works, when water vapor directly collides with the pore plate in the front for condensation, a part of water vapor directly penetrates through the air guide holes in the pore plate and enters the inside of the diaphragm vacuum pump, so that the water vapor and gas penetrating through the air inlet holes firstly collide with the impact baffle in the front, then flow upwards and enter the pore plate through the communication part above the impact baffle, and finally flow downwards and penetrate through the pore plate, so that the phenomenon that part of the water vapor flows out when the water vapor collides in the front is effectively avoided; simultaneously when the operation is improper, a large amount of liquid flow in diaphragm vacuum pump, because the air guide hole on the orifice plate is nearer apart from the bottom, therefore the space that the liquid was accumulated is limited, if the speed that first drainage hole got rid of liquid is less than the speed that constantly inhales liquid makes liquid pass the air guide hole easily and further channels into, consequently strike the baffle and enclose between effectual and the guard box between the orifice plate and close and form a retaining space, liquid can pass through the quick discharge of second exhaust hole, the time buffering that the problem was dealt with has been increased, moreover, the steam generator is simple in structure.

Preferably, the left side surface of the pore plate is fixedly connected with an air containing cover at the position of the air guide hole; the lower surface in the gas containing cover is fixedly connected with two electric connectors; a gap space is reserved between the two electric connectors; the during operation, when in uncontrolled a large amount of entering diaphragm vacuum pump of liquid, liquid can pass the gas guide hole on the first orifice plate and enter into and hold the gas cover, and then further leading-in to the inside of next door vacuum pump, consequently, in order to avoid liquid to pass container cover further leading-in, bottom through at container cover sets up two electricity connectors, if there is liquid to flow in, two electricity connectors can be switched on because of liquid, the signal of telecommunication that then switches on can make diaphragm vacuum pump shut down, intelligent guard action has been realized, the space of container cover also can have certain retaining effect simultaneously, give the mechanism response and provide the time buffering.

Preferably, a condenser pipe is arranged at the left side of the gas containing cover in the protection box, and the gas inlet end of the condenser pipe is communicated with the inside of the gas containing cover; the air outlet end of the condensation pipe penetrates through the protection box and is communicated with the air inlet valve; the during operation, when needs last carry out the evacuation to high temperature device, because the route that the wave panel increases is limited, although can realize the seizure of vapor, but long-time operation, hot-air is difficult to drop to lower temperature interval, especially use the later stage, the phenomenon that hot-air cooling is not enough often can all appear, can reduce diaphragm vacuum pump's life, consequently, be equipped with the condenser pipe in holding gas hood left side position through the inside at the guard box, can continuously carry out effectual cooling to hot-air, operating stability under the high temperature condition has been guaranteed, simultaneously also greatly prolong diaphragm vacuum pump's life.

Preferably, the side wall of the protection box is provided with mounting grooves at the positions of the condensation pipes; a heat dissipation plate is fixedly connected in the mounting groove; the during operation because the condenser pipe all is located the inside of guard box, therefore the unable effectual discharge of heat that the condenser pipe distributed out, through setting up the heating panel in the condenser pipe position at the lateral wall of guard box for the heat that the heating panel distributed out can effectively derive the guard box, and then dispels the heat through the rectangular hole on the casing again.

The invention has the following beneficial effects:

1. according to the diaphragm vacuum pump, the shell, the cylinder and the protection box are arranged, the cylinder in the shell can drive the diaphragm to move, so that the air pressure intensity in the pipeline is driven to change alternately and continuously, air inlet of the air inlet valve and air outlet of the air outlet valve are realized, meanwhile, the protection box is arranged between the air inlet valve and the air inlet connector, the problems that in the prior art, the diaphragm vacuum pump directly vacuumizes the device, liquid or vapor easily enters the device, and meanwhile, if the temperature in the device is high, hot air in the device is directly extracted, the diaphragm in the diaphragm vacuum pump is easily damaged and the like are effectively solved, and the service life of the diaphragm vacuum pump is effectively prolonged.

2. According to the diaphragm vacuum pump, the wave panel, the impact baffle, the pore plate and the condenser pipe are arranged, the wave panel is fixedly connected in the air inlet of the protection box, the impact baffle is fixedly connected in the protection box at the left side of the wave panel, the pore plate and the condenser pipe are sequentially and fixedly connected in the protection box at the left side of the impact panel, the gas flow path is effectively increased, the continuous cooling effect on high-temperature gas can be achieved, the phenomenon that water vapor directly impacts the pore plate is avoided, the condensation effect on the water vapor is improved, the sucked gas is continuously and effectively cooled, the continuous operation time of the diaphragm vacuum pump under the condition of high-temperature gas is prolonged, the quick discharge of sucked liquid can be effectively achieved, and effective time buffering is provided for mechanism closing response.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cutaway view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

in the figure: the air conditioner comprises a shell 1, a cavity 11, an air inlet joint 12, an air cylinder 2, a moving column 21, an upper arc disc 22, a lower arc disc 23, a diaphragm 24, a pipeline 25, an air outlet valve 26, an air inlet valve 27, a protection box 3, an orifice plate 31, an air guide hole 32, a first water drainage hole 33, a wave panel 34, an impact baffle 35, a second water drainage hole 36, an air containing cover 37, an electric connector 38, a condensation pipe 39 and a heat dissipation plate 310.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 4, a diaphragm vacuum pump according to the present invention includes a housing 1, a cylinder 2, and a protection casing 3; the shell 1 is designed to be of a cuboid structure; a cavity 11 is formed in the shell 1; the front wall, the rear wall and the right wall of the shell 1 are all provided with rectangular holes which are uniformly distributed; the upper surface of the cavity 11 is fixedly connected with a cylinder 2; the output shaft of the cylinder 2 is fixedly connected with a moving column 21; an upper arc disc 22 is arranged at the lower position of the cylinder 2, and the movable column 21 is connected to the upper arc disc 22 in a vertically sliding manner; a lower arc disc 23 is arranged below the upper arc disc 22; a diaphragm 24 is fixedly connected between the upper arc disc 22 and the lower arc disc 23, and the center position of the diaphragm 24 is fixedly connected with the moving column 21; the lower surface of the lower arc disc 23 is provided with a through hole; a pipeline 25 is fixedly connected in the through hole; an air outlet valve 26 is fixedly connected to the left side of the pipeline 25; an air inlet valve 27 is fixedly connected to the right side of the pipeline 25; the inside of the cavity 11 is fixedly connected with a protection box 3 at the right side position of the air inlet valve 27; the inside of the protection box 3 is provided with a pore plate 31, and the pore plate 31 divides the inside of the protection box 3 into a left cavity and a right cavity; the surface of the pore plate 31 is provided with air guide holes 32 which are uniformly distributed, and the air guide holes 32 can conduct the left cavity and the right cavity; an air inlet is formed in the right side surface of the protection box 3; the right side surface of the protection box 3 is fixedly connected with an air inlet joint 12 at the position of an air inlet hole; a first drainage hole 33 is formed in the lower surface of the protection box 3 between the pore plate 31 and the air inlet, and a first rubber ball is arranged in the first drainage hole 33; when the device is in use, when the device is required to be vacuumized, the air inlet joint 12 of the diaphragm vacuum pump is connected with the device, the switch of the diaphragm vacuum pump is opened under the condition that the connection seal is effective, the output shaft of the air cylinder 2 moves up and down at the moment, and then the moving column 21 is driven to move up and down, and the moving column 21 can further drive the diaphragm 24 to deform, so that the diaphragm 24 is convex and concave, further the air pressure intensity in the pipeline 25 changes alternately, the air inlet valve 27 can introduce air into the pipeline 25, the air outlet valve 26 can lead the air in the pipeline 25 out, when the device which needs to be vacuumized contains liquid, if the operation is improper, the liquid is easy to be sucked into the diaphragm vacuum pump, and the damage of the diaphragm vacuum pump is easy to cause, therefore, the protection box 3 is arranged at the right side position of the air inlet valve 27, so that, through arranging the pore plate 31 in the protection box 3 and arranging the air guide holes 32 uniformly on the surface of the pore plate 31, when gas passes through the protection box 3, the gas can pass through the air guide holes 32 of the pore plate 31, but a small amount of sucked liquid can be blocked by the pore plate 31, and then the liquid enters the first exhaust hole, and the first rubber ball in the first exhaust hole stops blocking the first exhaust hole due to the buoyancy action of water, so that the liquid is smoothly guided out; when the device contains a large amount of water vapor, the water vapor is easily led into the pipeline 25 along with the gas, under the long-time working condition, the water vapor can be accumulated in the diaphragm vacuum pump, the service life of the vacuum pump is influenced or the vacuum pump is damaged, through the arrangement of the pore plate 31, when the gas passes through the gas guide hole 32 on the pore plate 31, the water vapor contained in the gas can be condensed due to the impact on the pore plate 31 and continuously gathers on the right side surface of the pore plate 31 to form liquid drops and flow into the first exhaust hole, the separation of the water vapor and the air is realized, the pipeline 25 of the water vapor entering the inside of the diaphragm vacuum pump is reduced, meanwhile, the temperature of the hot air can be reduced by impacting the pore plate 31, the aging phenomenon of the diaphragm 24 due to high temperature is further protected, the diaphragm vacuum pump in the prior art can directly vacuumize the device, and the liquid or the water vapor, meanwhile, if the device is internally provided with high temperature, hot air in the device is directly extracted, so that the problems that the diaphragm 24 in the diaphragm vacuum pump is damaged and the like are easily caused, corrosive liquid is prevented from entering due to the blocking effect of the pore plate 31, the aging corrosion of the diaphragm 24 is caused, and the service life of the diaphragm vacuum pump is effectively prolonged.

As an embodiment of the present invention, a wave panel 34 is uniformly arranged in the air inlet; the during operation, when the high-temperature gas in the device is directly inhaled in the diaphragm vacuum pump, although the cooling of the passageway in orifice plate 31 and the guard box 3, but because the route of gas process is shorter, the extraction high-temperature gas of continuation, the cooling effect of orifice plate 31 is limited, consequently, through evenly arranging wave panel 34 in the inlet port on orifice plate 31 right side, the effectual circulation route that has increased gas, can play lasting cooling effect to high-temperature gas, the time of the operation under the diaphragm vacuum pump high-temperature gas condition has been increased, moreover, the steam generator is simple in structure, and manual operation is not needed.

As an embodiment of the present invention, an impact baffle 35 is fixedly connected between the first drain hole 33 and the wave panel 34 inside the protection box 3, and the left and right spaces of the impact baffle 35 are communicated with each other above the impact baffle 35; a second water drainage hole 36 is formed in the lower surface of the protection box 3 between the impact baffle 35 and the wave panel 34, and a second rubber ball is arranged in the second water drainage hole 36; when the vacuum pump works, when water vapor directly collides with the pore plate 31 in the front for condensation, a part of water vapor directly passes through the air guide holes 32 on the pore plate 31 and enters the inside of the diaphragm vacuum pump, so that the water vapor and gas passing through the air inlet holes firstly collide with the impact baffle 35 in the front, then flow upwards and enter the position of the pore plate 31 through the upper communication part of the impact baffle 35, and finally flow downwards and pass through the pore plate 31, so that the phenomenon that part of the water vapor flows out when the water vapor collides in the front is effectively avoided; meanwhile, when the operation is improper, a large amount of liquid flows into the diaphragm vacuum pump, and the air guide holes 32 in the pore plates 31 are close to the bottom, so that the space for accumulating the liquid is limited, if the speed for discharging the liquid through the first water discharge holes 33 is slower than the speed for continuously sucking the liquid, the liquid is easy to further guide in through the air guide holes 32, therefore, the impact baffle 35 effectively surrounds and forms a water storage space between the pore plates 31 and the protection box 3, the liquid can be quickly discharged through the second air discharge holes, the time buffer for problem disposal is increased, and the structure is simple.

As an embodiment of the present invention, a gas containing cover 37 is fixed to the left side surface of the orifice plate 31 at the position of the gas guide hole 32; the lower surface of the inside of the gas containing cover 37 is fixedly connected with two electric connectors 38; a gap space is left between the two electric connectors 38; during operation, when the uncontrolled a large amount of entering diaphragm vacuum pump of liquid in, liquid can pass gas guide hole 32 on first orifice plate 31 and enter into appearance gas hood 37, and then further leading-in to the inside of next door vacuum pump, consequently, avoid liquid to pass container hood further leading-in, bottom through at container hood sets up two electric connectors 38, if when having liquid to flow in, two electric connectors 38 can be switched on because of liquid, and then the signal of telecommunication that switches on can make diaphragm vacuum pump shut down, intelligent guard action has been realized, the space of container hood also can have certain retaining effect simultaneously, give the mechanism response and provide the time buffering.

In an embodiment of the present invention, a condenser pipe 39 is disposed inside the protection box 3 at a left side of the gas-containing cover 37, and a gas inlet end of the condenser pipe 39 is communicated with the inside of the gas-containing cover 37; the air outlet end of the condensation pipe 39 passes through the protection box 3 and is communicated with the air inlet valve 27; the during operation, when need last when carrying out the evacuation to high temperature device, because the route that wave panel 34 increases is limited, although can realize the seizure of vapor, but long-time operation, hot-air is difficult to drop to lower temperature interval, especially, use the later stage, the phenomenon that hot-air cooling is not enough often all can appear, can reduce diaphragm vacuum pump's life, consequently, be equipped with condenser pipe 39 in holding gas hood 37 left side position through the inside at protection box 3, can continuously carry out effectual cooling to hot-air, the stability of operation under the high temperature condition has been guaranteed, simultaneously also greatly prolong diaphragm vacuum pump's life.

As an embodiment of the present invention, the side wall of the protection box 3 is provided with mounting grooves at the position of the condensation pipe 39; a heat dissipation plate 310 is fixedly connected in the mounting groove; the during operation because condenser pipe 39 all is located the inside of guard box 3, therefore the unable effectual discharge of heat that condenser pipe 39 distributed out sets up heating panel 310 in condenser pipe 39 position through the lateral wall at guard box 3 for the heat that heating panel 310 distributed out can effectively derive guard box 3, and then dispels the heat through the rectangular hole on the casing 1 again.

The specific working process is as follows:

when the device is in use, when the device is required to be vacuumized, the air inlet joint 12 of the diaphragm vacuum pump is connected with the device, the switch of the diaphragm vacuum pump is opened under the condition that the connection seal is effective, the output shaft of the air cylinder 2 moves up and down at the moment, and then the moving column 21 is driven to move up and down, and the moving column 21 can further drive the diaphragm 24 to deform, so that the diaphragm 24 is convex and concave, further the air pressure intensity in the pipeline 25 changes alternately, the air inlet valve 27 can introduce air into the pipeline 25, the air outlet valve 26 can lead the air in the pipeline 25 out, when the device which needs to be vacuumized contains liquid, if the operation is improper, the liquid is easy to be sucked into the diaphragm vacuum pump, and the damage of the diaphragm vacuum pump is easy to cause, therefore, the protection box 3 is arranged at the right side position of the air inlet valve 27, so that, through arranging the pore plate 31 in the protection box 3 and arranging the air guide holes 32 uniformly on the surface of the pore plate 31, when gas passes through the protection box 3, the gas can pass through the air guide holes 32 of the pore plate 31, but a small amount of sucked liquid can be blocked by the pore plate 31, and then the liquid enters the first exhaust hole, and the first rubber ball in the first exhaust hole stops blocking the first exhaust hole due to the buoyancy action of water, so that the liquid is smoothly guided out; when the device contains a large amount of water vapor, the water vapor is easily introduced into the pipeline 25 along with the gas, and under the long-time working condition, the water vapor can be accumulated in the diaphragm vacuum pump, so that the service life of the vacuum pump is influenced or the vacuum pump is damaged, through the arrangement of the pore plate 31, when the gas passes through the gas guide holes 32 on the pore plate 31, the water vapor contained in the gas can be condensed due to the impact on the pore plate 31 and continuously gathers on the right side surface of the pore plate 31 to form liquid drops and flow into the first exhaust hole, so that the separation of the water vapor and the air is realized, the pipeline 25 of the water vapor entering the inside of the diaphragm vacuum pump is reduced, meanwhile, the temperature of the hot air can be reduced by impacting the pore plate 31, and the aging phenomenon of; when high-temperature gas in the device is directly sucked into the diaphragm vacuum pump, although the channels in the pore plate 31 and the protection box 3 are cooled, the path through which the gas passes is short, the high-temperature gas is continuously extracted, and the cooling effect of the pore plate 31 is limited, so that the wave panels 34 are uniformly arranged in the gas inlet hole on the right side of the pore plate 31, the circulation path of the gas is effectively increased, the high-temperature gas can be continuously cooled, and the running time of the diaphragm vacuum pump under the condition of the high-temperature gas is prolonged; when the water vapor directly collides with the pore plate 31 in the front for condensation, a part of the water vapor directly passes through the air guide holes 32 on the pore plate 31 and enters the inside of the diaphragm vacuum pump, so that the water vapor and the gas passing through the air guide holes firstly collide with the impact baffle 35 in the front by arranging the impact baffle 35, then flow upwards and enter the position of the pore plate 31 through the communication part above the impact baffle 35, and finally flow downwards and pass through the pore plate 31, thereby effectively avoiding the partial outflow of the water vapor when the water vapor collides in the front; meanwhile, when the operation is improper, a large amount of liquid flows into the diaphragm vacuum pump, the air guide holes 32 in the pore plates 31 are close to the bottom, so that the space for accumulating the liquid is limited, if the speed for discharging the liquid by the first water discharge holes 33 is slower than the speed for continuously sucking the liquid, the liquid is easy to further guide in through the air guide holes 32, therefore, the impact baffle 35 effectively encloses the space between the pore plates 31 and the protective box 3 to form a water storage space, and the liquid can be quickly discharged through the second air discharge holes; when a large amount of liquid uncontrolled enters the diaphragm vacuum pump, the liquid can pass through the air guide holes 32 on the first pore plate 31 to enter the air containing cover 37 and further be guided into the partition wall vacuum pump, so that in order to avoid the liquid from further being guided through the container cover, two electric connectors 38 are arranged at the bottom of the container cover, if liquid flows in, the two electric connectors 38 are conducted due to the liquid, and further, the conducted electric signals can stop the operation of the diaphragm vacuum pump, thereby realizing the intelligent protection effect; when the needs last carry out the evacuation to high temperature device, because the route that wave panel 34 increases is limited, though can realize the seizure of vapor, but long-time operation, hot-air is difficult to drop to lower temperature interval, especially uses the later stage, the phenomenon that hot-air cooling is not enough often all can appear, can reduce diaphragm vacuum pump's life, consequently through be provided with condenser pipe 39 in holding gas hood 37 left side position in the inside at guard box 3, can continuously carry out effectual cooling to hot-air.

While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. A diaphragm vacuum pump comprises a shell (1), a cylinder (2) and a protection box (3); the method is characterized in that: the shell (1) is designed to be of a cuboid structure; a cavity (11) is formed in the shell (1); the front wall, the rear wall and the right wall of the shell (1) are provided with rectangular holes which are uniformly distributed; the upper surface of the cavity (11) is fixedly connected with a cylinder (2); an output shaft of the cylinder (2) is fixedly connected with a movable column (21); an upper arc disc (22) is arranged at the lower position of the cylinder (2), and the movable column (21) is connected to the upper arc disc (22) in a vertically sliding manner; a lower arc disc (23) is arranged below the upper arc disc (22); a diaphragm (24) is fixedly connected between the upper arc disc (22) and the lower arc disc (23), and the center position of the diaphragm (24) is fixedly connected with the moving column (21); the lower surface of the lower arc disc (23) is provided with a through hole; a pipeline (25) is fixedly connected in the through hole; the left side position of the pipeline (25) is fixedly connected with an air outlet valve (26); an air inlet valve (27) is fixedly connected to the right side of the pipeline (25); a protection box (3) is fixedly connected to the right side position of the air inlet valve (27) in the cavity (11); a pore plate (31) is arranged inside the protection box (3), and the pore plate (31) divides the inside of the protection box (3) into a left cavity and a right cavity; the surface of the pore plate (31) is provided with air guide holes (32) which are uniformly distributed, and the air guide holes (32) can conduct the left cavity and the right cavity; an air inlet is formed in the side surface of the right side of the protection box (3); an air inlet joint (12) is fixedly connected to the right side surface of the protection box (3) at the position of the air inlet hole; a first water discharging hole (33) is formed in the position, between the pore plate (31) and the air inlet hole, of the lower surface of the protection box (3), and a first rubber ball is arranged in the first water discharging hole (33).

2. A diaphragm vacuum pump according to claim 1, wherein: the air inlet holes are internally provided with wave panels (34) which are uniformly arranged.

3. A diaphragm vacuum pump according to claim 2, wherein: an impact baffle plate (35) is fixedly connected between the first drainage hole (33) and the wave panel (34) in the protection box (3), and the left and right side spaces of the impact baffle plate (35) are communicated with the upper part of the impact baffle plate (35); and a second water drainage hole (36) is formed in the lower surface of the protection box (3) between the impact baffle (35) and the wave panel (34), and a second rubber ball is arranged in the second water drainage hole (36).

4. A diaphragm vacuum pump according to claim 1, wherein: the left side surface of the pore plate (31) is fixedly connected with an air containing cover (37) at the position of the air guide hole (32); the lower surface of the inside of the gas containing cover (37) is fixedly connected with two electric connectors (38); a clearance space is left between the two electric connectors (38).

5. A diaphragm vacuum pump according to claim 1, wherein: a condensing pipe (39) is arranged at the left side of the gas containing cover (37) in the protection box (3), and the gas inlet end of the condensing pipe (39) is communicated with the inside of the gas containing cover (37); and the air outlet end of the condensation pipe (39) passes through the protection box (3) and is communicated with the air inlet valve (27).

6. A diaphragm vacuum pump according to claim 5, wherein: mounting grooves are formed in the side wall of the protection box (3) at the position of the condensation pipe (39); and a heat dissipation plate (310) is fixedly connected in the mounting groove.