阅读说明：本技术 一种空气压缩机 (Air compressor ) 是由 许建南 陈华丰 于 2019-09-11 设计创作，主要内容包括：本发明公开了一种空气压缩机,其技术方案要点是：包括储气罐,储气罐上设有低压压缩机、高压压缩机、第一三通阀,低压压缩机上设有第一进气管和第一出气管,高压压缩机上设有第二进气管和第二出气管,第一出气管连接在第一三通阀的入口端上,第一三通阀的一个出口端与储气罐连通,第二进气管连接在第一三通阀的另一个出口端上,第二进气管上连接有进气支管,进气支管上安装有电磁阀,第二出气管储气罐连接。第一出气管通过第一三通阀与储气罐连通时,低压压缩机和高压压缩机均为一级压缩,并均向储气罐内供气,压缩空气的排量大；当第一三通阀将第一出气管和第二进气管连通时,高压压缩机为二级压缩,排放到储气罐内的压缩空气的压力高。(The invention discloses an air compressor, which adopts the technical scheme that: including the gas holder, be equipped with low pressure compressor on the gas holder, high pressure compressor, first three-way valve, be equipped with first intake pipe and first outlet duct on the low pressure compressor, be equipped with second intake pipe and second outlet duct on the high pressure compressor, first outlet duct is connected on the entry end of first three-way valve, an exit end and the gas holder intercommunication of first three-way valve, second intake pipe connection is on another exit end of first three-way valve, be connected with inlet manifold in the second intake pipe, the last solenoid valve that installs of inlet manifold, second outlet duct gas tank connection. When the first air outlet pipe is communicated with the air storage tank through the first three-way valve, the low-pressure compressor and the high-pressure compressor are both in primary compression and supply air to the air storage tank, and the displacement of compressed air is large; when the first three-way valve communicates the first air outlet pipe with the second air inlet pipe, the high-pressure compressor is in two-stage compression, and the pressure of compressed air discharged into the air storage tank is high.)

1. An air compressor, comprising an air storage tank (1), characterized in that: the air storage tank (1) is provided with a low-pressure compressor (2) and a high-pressure compressor (3), the low-pressure compressor (2) is provided with a first air inlet pipe (21) and a first air outlet pipe (22), the high-pressure compressor (3) is provided with a second air inlet pipe (31) and a second air outlet pipe (32), and the outer side wall of the air storage tank (1) is provided with a first interface pipe (11) and a second interface pipe (12) which are communicated with the inside of the air storage tank (1); still include first three-way valve (4), the one end that low pressure compressor (2) were kept away from in first outlet duct (22) is connected on the entry end of first three-way valve (4), the one end that gas holder (1) were kept away from in first mouthpiece (11) is connected on an exit end of first three-way valve (4), the one end that high pressure compressor (3) were kept away from in second intake pipe (31) is connected on another exit end of first three-way valve (4), still be connected with air intake branch pipe (311) on second intake pipe (31), install solenoid valve (312) on air intake branch pipe (311), second outlet duct (32) and second mouthpiece (12) are connected.

2. An air compressor as claimed in claim 1, wherein: the heat exchanger is characterized by further comprising a water storage tank (7), a water pump (71), a first heat exchange unit (8) and a second heat exchange unit (9) which are located on one side of the air storage tank (1), wherein a water conveying pipe (72) and a water return pipe (73) are arranged on the water storage tank (7), the first heat exchange unit (8) is connected between the first air outlet pipe (22) and the first connector pipe (11), the second heat exchange unit (9) is connected between the second air outlet pipe (32) and the second connector pipe (12), the water pump (71) is located in the water storage tank (7) and supplies water to the first heat exchange unit (8) and the second heat exchange unit (9) through the water conveying pipe (72), and the first heat exchange unit (8) and the second heat exchange unit (9) return water to the water storage tank (7) through the water return pipe (73).

3. An air compressor as claimed in claim 2, wherein: the first heat exchange unit (8) comprises a heat exchange box (81) and an air supply pipe (82) positioned in the heat exchange box (81), wherein two ends of the air supply pipe (82) are respectively fixed on the side walls of two ends of the heat exchange box (81), two ends of the air supply pipe (82) are respectively communicated with a first air storage tank (1) and a first interface pipe (11), a water inlet is formed in the top of the heat exchange box (81) through a water conveying pipe (72), a first water outlet (811) is formed in the side wall of the heat exchange box (81) through a water return pipe (73), and the first water outlet (811) is higher than the air supply pipe (82); the second heat exchange unit (9) has the same structure as the first heat exchange unit (8).

4. An air compressor as claimed in claim 3, wherein: the bottom of the heat exchange box (81) is also provided with a second water outlet (812), a water return branch pipe (731) communicated with the second water outlet (812) is arranged on the water return pipe (73), and the diameter of the second water outlet (812) is smaller than that of the first water outlet (811).

5. An air compressor as claimed in claim 4, wherein: the length direction of the air supply pipe (82) is the same as that of the corresponding heat exchange box (81), the air supply pipe (82) is a coil pipe, the air supply pipe (82) is parallel to the bottom of the heat exchange box (81), and the air supply pipe (82) is positioned between the first water outlet (811) and the second water outlet (812) in the vertical direction.

6. An air compressor as claimed in claim 3, wherein: the low-pressure compressor (2) and the high-pressure compressor (3) are close to two ends of the gas storage tank (1) respectively, the two heat exchange boxes (81) are arranged between the low-pressure compressor (2) and the high-pressure compressor (3) in parallel, the two heat exchange boxes (81) are close to two sides of the gas storage tank (1) respectively, the first gas outlet pipe (22) and the second gas inlet pipe (31) are close to the same side of the gas storage tank (1), and the second gas outlet pipe (32) and the second interface pipe (12) are close to the other side of the gas storage tank (1).

7. An air compressor as claimed in claim 1, wherein: a second three-way valve (5) is further arranged on the first air outlet pipe (22), and one outlet end of the second three-way valve (5) is directly communicated with the outside; and a third three-way valve (6) is arranged between the second air outlet pipe (32) and the second mouthpiece (12), and one outlet end of the third three-way valve (6) is directly communicated with the outside.

8. An air compressor as claimed in claim 1, wherein: and air filters (313) are mounted on the air inlet branch pipe (311) and the first air inlet pipe (21).

Technical Field

the invention relates to the technical field of air compressors, in particular to an air compressor.

Background

the air compressor is used as the main body of the air source device and converts the mechanical energy of the prime motor into the internal energy of the gas. The comparatively common air compressor of positive displacement air compressor machine, positive displacement air compressor machine is through the compressed gas volume, increases gaseous molecule density in the unit volume to improve compressed air's pressure.

At present, chinese patent with publication number CN105089974B discloses a double-cylinder air compressor, which comprises a housing, a motor, a first air compression assembly and a second air compression assembly, wherein a first crankcase and a second crankcase are respectively installed at two ends of the motor, a first eccentric wheel and a second eccentric wheel are respectively fixedly connected to two ends of a motor shaft of the motor, the first air compression assembly comprises a first connecting rod, a first piston and a first air cylinder, the first connecting rod is sleeved on the first eccentric wheel through a bearing, the second air compression assembly comprises a second connecting rod, a second piston and a second air cylinder, the second connecting rod is sleeved on the second eccentric wheel through a bearing, an included angle between a perpendicular line from a center of the first eccentric wheel to a shaft axis of the motor shaft and a perpendicular line from a center of the second eccentric wheel to the shaft axis of the motor shaft is always 180 °, that is, when the first connecting.

In the patent, after air compression is finished, compressed air is input into an air storage tank, in order to increase the displacement, a double-cylinder air compressor is generally added, and the two double-cylinder air compressors simultaneously supply air for an air outlet tank; if the pressure of the compressed air needs to be increased, a high-pressure air compressor with higher power and higher pressure resistance needs to be added, and the compressed air of the double-cylinder air compressor in the patent is conveyed into the high-pressure air compressor to be compressed in a secondary mode. And present air compressor machine all is applicable to one in above-mentioned two kinds of circumstances, leads to probably appearing the condition that needs prepare two kinds of air compressors simultaneously, causes manufacturing cost's improvement.

Disclosure of Invention

In view of the disadvantages of the prior art, an object of the present invention is to provide an air compressor having advantages of being flexibly adjustable according to a use environment.

The technical purpose of the invention is realized by the following technical scheme: an air compressor comprises an air storage tank, wherein a low-pressure compressor and a high-pressure compressor are arranged on the air storage tank, a first air inlet pipe and a first air outlet pipe are arranged on the low-pressure compressor, a second air inlet pipe and a second air outlet pipe are arranged on the high-pressure compressor, and a first interface pipe and a second interface pipe which are communicated with the inside of the air storage tank are arranged on the outer side wall of the air storage tank; still include first three-way valve, the one end that low pressure compressor was kept away from to first outlet duct is connected on the entry end of first three-way valve, the one end that the gas holder was kept away from to first mouthpiece is connected on an exit end of first three-way valve, the one end that high pressure compressor was kept away from to the second intake pipe is connected on another exit end of first three-way valve, still be connected with air intake branch in the second intake pipe, the last solenoid valve that installs of air intake branch, second outlet duct and second mouthpiece are connected.

Through the technical scheme, when the first joint pipe is communicated with the first air outlet pipe through the first three-way valve, the low-pressure compressor and the high-pressure compressor are both in primary compression, compressed air is provided for the air storage tank, and the displacement of the compressed air is large while the pressure is low; when first three-way valve was with first outlet duct and second intake pipe intercommunication, low pressure compressor was responsible for providing the compressed air after the one-level compression to high pressure compressor, and high pressure compressor is the second grade compression, and the pressure that discharges the compressed air in the gas holder is high to make whole air compressor can be suitable for under more circumstances.

Preferably, still including water storage box, water pump, first heat exchange unit and the second heat exchange unit that is in gas holder one side, be equipped with raceway and wet return on the water storage box, first heat exchange unit connects between first outlet duct and first mouth-piece, second heat exchange unit connects between second outlet duct and second mouth-piece, the water pump is in the water storage box and supplies water to first heat exchange unit and second heat exchange unit through the raceway, and first heat exchange unit and second heat exchange unit are through the wet return to the water storage box return water respectively.

Through above-mentioned technical scheme, because the air can produce a large amount of heats when being compressed, especially high pressure compressor is when carrying out the second grade compression, and the heat that compressed air produced is bigger, if directly pour into these compressed air into the gas holder, can lead to the gas temperature in the gas holder too high, further increase the inflation of air, make the atmospheric pressure in the gas holder exceed predetermined atmospheric pressure value. Therefore, the first heat exchange unit is used for cooling the outlet air of the low-pressure compressor, and the second heat exchange unit is used for cooling the outlet air of the high-pressure compressor, so that the heat dissipation effect on the compressed air is enhanced.

Preferably, the first heat exchange unit comprises a heat exchange box and an air supply pipe arranged in the heat exchange box, two ends of the air supply pipe are respectively fixed on the side walls of two ends of the heat exchange box, two ends of the air supply pipe are respectively communicated with the first air storage tank and the first interface pipe, the water delivery pipe is provided with a water inlet at the top of the heat exchange box, the water return pipe is provided with a first water outlet on the side wall of the heat exchange box, and the first water outlet is higher than the air supply pipe; the second heat exchange unit has the same structure as the first heat exchange unit.

Through above-mentioned technical scheme, compressed air is sent into in the air-feed pipe in order to pass through the heat exchange case, when needs are to the compressed air cooling, utilize the water pump to send the cooling water into the heat exchange case through the raceway, the unnecessary cooling water just can flow back to the cistern from first delivery port after the cooling water floods the air-feed pipe, heat transfer in the compressed air of the air-feed pipe of flowing through is to the cooling water in the heat exchange case, and the heat of the cooling water in the heat exchange case is in the external air along with the continuous flow transfer of cooling water.

Preferably, the bottom of the heat exchange box is further provided with a second water outlet, a return water branch pipe communicated with the second water outlet is arranged on the return water pipe, and the diameter of the second water outlet is smaller than that of the first water outlet.

Through the technical scheme, the flow speed of the water discharged from the second water outlet is slower than the flow speed of the water fed into the heat exchange box, so that the cooling water in the heat exchange box can be gradually increased until the cooling water overflows from the first water outlet, and when the heat exchange box is filled with the cooling water, the cooling water can form two flowing directions of the horizontal direction and the vertical direction, the replacement speed of the cooling water in the heat exchange box is accelerated, and the possibility of overhigh temperature of the cooling water at the lower end of the heat exchange box is reduced.

preferably, the length direction of the air supply pipe is the same as that of the corresponding heat exchange box, the air supply pipe is a coil pipe, the air supply pipe is parallel to the bottom of the heat exchange box, and the air supply pipe is located between the first water outlet and the second water outlet in the vertical direction.

Through the technical scheme, the contact area of the air supply pipe and the cooling water is large, the air supply pipe is located in the middle of the cooling water, enough cooling water is arranged on the upper side and the lower side of the air supply pipe to transfer heat of the compressed air in the air supply pipe, and the heat transfer efficiency can be accelerated.

Preferably, the low-pressure compressor and the high-pressure compressor are close to two ends of the gas storage tank respectively, the two heat exchange boxes are arranged between the low-pressure compressor and the high-pressure compressor in parallel, the two heat exchange boxes are close to two sides of the gas storage tank respectively, the first gas outlet pipe and the second gas inlet pipe are close to the same side of the gas storage tank, and the second gas outlet pipe and the second interface pipe are close to the other side of the gas storage tank.

Through above-mentioned technical scheme, first outlet duct and second intake pipe can lug connection on the both ends of the heat exchange box of homonymy, and second outlet duct and second mouth-piece are connected with another heat exchange box, and the distance of pipe connection is short, reduces crisscross, the winding between the pipeline, makes the distribution of pipeline obtain rational arrangement.

Preferably, the first air outlet pipe is further provided with a second three-way valve, and one outlet end of the second three-way valve is directly communicated with the outside; and a third three-way valve is arranged between the second air outlet pipe and the second mouthpiece, and one outlet end of the third three-way valve is directly communicated with the outside.

Through above-mentioned technical scheme, when whole air compressor can not normally cut off the power supply or man-made when stopping, the compressed gas in first outlet duct and the second outlet duct all can not get the evacuation, stagnant compressed air can be in the load when piston air compressor restarts and starts rather than idle start, cause piston air compressor's start-up input power increase like this, cause piston air compressor impaired easily, and can arrange stagnant compressed air to the external world earlier before the start-up through second three-way valve and third three-way valve, make piston air compressor can idle start.

preferably, an air filter is mounted on each of the air inlet branch pipe and the first air inlet pipe.

Through above-mentioned technical scheme, filter the impurity that enters into in the air of low pressure compressor and high pressure compressor, reduce the influence to the cylinder in low pressure compressor and the high pressure compressor, improve air compressor's life.

In summary, compared with the prior art, the beneficial effects of the invention are as follows:

1. By arranging the first three-way valve, whether the high-pressure compressor carries out secondary compression or not can be conveniently controlled according to use requirements, so that the air compressor is more flexible to use;

2. Through setting up first heat exchanger and second heat exchanger, can effectively reduce compressed air's temperature when high pressure compressor carries out the second grade compression, reduce the temperature of gas in the gas holder, make compressed air's pressure value more accurate.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a schematic view showing a piping connection between a low pressure compressor and a high pressure compressor in the embodiment;

Fig. 4 is a connection structure diagram of a water return pipe and a water delivery pipe in the embodiment.

Reference numerals: 1. a gas storage tank; 11. a first interface tube; 12. a second mouthpiece; 13. a support; 2. a low pressure compressor; 21. a first intake pipe; 22. a first air outlet pipe; 3. a high pressure compressor; 31. a second intake pipe; 311. an intake branch pipe; 312. an electromagnetic valve; 313. an air filter; 32. a second air outlet pipe; 4. a first three-way valve; 5. a second three-way valve; 6. a third three-way valve; 7. a water storage tank; 71. a water pump; 72. a water delivery pipe; 73. a water return pipe; 731. a return water branch pipe; 8. a first heat exchange unit; 81. a heat exchange box; 811. a first water outlet; 812. a second water outlet; 82. an air supply pipe; 9. a second heat exchange unit.

Detailed Description

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

An air compressor, as shown in fig. 1, comprises an air storage tank 1 and a water storage tank 7 located on one side of the air storage tank 1, wherein a support 13 extending along the length direction of the air storage tank 1 is arranged at the top of the air storage tank 1, a low-pressure compressor 2, a high-pressure compressor 3, a first heat exchange unit 8 and a second heat exchange unit 9 are arranged on the support 13, the low-pressure compressor 2 and the high-pressure compressor 3 are respectively close to two ends of the air storage tank 1, the first heat exchange unit 8 and the second heat exchange unit 9 are located between the low-pressure compressor 2 and the high-pressure compressor 3, and a water pump 71 supplying water to the first heat exchange unit 8 and the second heat exchange unit. When the outlet gas of the low-pressure compressor 2 supplies gas to the high-pressure compressor 3, the first heat exchange unit 8 cools the outlet gas of the low-pressure compressor 2, and the second heat exchange unit 9 cools the outlet gas of the high-pressure compressor 3.

Referring to fig. 1 and 3, a first mouthpiece 11 and a second mouthpiece 12 are arranged in a bracket 13, the first mouthpiece 11 and the second mouthpiece 12 are both communicated with the inside of the air storage tank 1, and the first mouthpiece 11 and the second mouthpiece 12 are distributed near two sides of the bracket 13. The first interface tube 11 is between the heat exchange tank 81 of the first heat exchange unit 8 and the high pressure compressor 3, and the second interface tube 12 is between the heat exchange tank 81 of the second heat exchange unit 9 and the low pressure compressor 2. One ends of the first mouthpiece 11 and the second mouthpiece 12, which are far away from the gas storage tank 1, are provided with one-way valves.

Referring to fig. 1 and 3, the length direction of the low pressure compressor 2 is perpendicular to the length direction of the gas storage tank 1, the top of the low pressure compressor 2 is provided with a first gas inlet pipe 21 and a first gas outlet pipe 22, the connection positions of the first gas inlet pipe 21, the first gas outlet pipe 22 and the low pressure compressor 2 are respectively located at two ends of the low pressure compressor 2, and the first gas outlet pipe 22 is located at one end of the low pressure compressor 2 close to the water storage tank 7. An air filter 313 is mounted on an end of the first intake pipe 21 remote from the low pressure compressor 2. Be equipped with second three-way valve 5 between low pressure compressor 2 and the first heat exchange unit 8, the one end of first outlet duct 22 is connected on low pressure compressor 2, and the other end of first outlet duct 22 is connected with on the entry end of second three-way valve 5, and an exit end and the first heat exchange unit 8 of second three-way valve 5 are connected, and the remaining exit end of second three-way valve 5 directly communicates with the external world.

Referring to fig. 1 and 3, the length direction of the high-pressure compressor 3 is perpendicular to the length direction of the gas storage tank 1, a second gas inlet pipe 31 and a second gas outlet pipe 32 are arranged on the high-pressure compressor 3, the second gas inlet pipe 31 is located on one side of the high-pressure compressor 3 close to the water storage tank, and the second gas outlet pipe 32 is located on one end of the high-pressure compressor 3 far away from the water storage tank. One end of the second air inlet pipe 31 far away from the high-pressure compressor 3 is provided with a first three-way valve 4, one outlet end of the first three-way valve 4 is communicated with the second air inlet pipe 31, and the other outlet end of the first three-way valve 4 is communicated with the first mouthpiece 11. Referring to fig. 2, the second intake pipe 31 is further provided with an intake branch pipe 311, the intake branch pipe 311 is provided with an electromagnetic valve 312, and an end portion of the intake branch pipe 311, which is far away from the second intake pipe 31, is provided with an air filter 313.

Referring to fig. 3, the first heat exchange unit 8 includes a heat exchange tank 81, an air supply pipe 82 in the heat exchange tank 81, the heat exchange tank 81 in the first heat exchange unit 8 is adjacent to the water storage tank 7, and the length direction of the heat exchange tank 81 is the same as the length direction of the air tank 1. The heat exchange box 81 is open, a first water outlet 811 is arranged on the side wall of the heat exchange box 81 on the same side as the side wall of the adjacent gas storage tank 1, and the first water outlet 811 is close to the top of the heat exchange box 81. The bottom of the heat exchange box 81 is provided with a second water outlet 812, and the diameter of the second water outlet 812 is smaller than that of the first water outlet 811. The air supply pipe 82 is a coil pipe, the entire length direction of the air supply pipe 82 is the same as the length direction of the heat exchange box 81, the air supply pipe 82 is parallel to the bottom of the heat exchange box 81, and the air supply pipe 82 is located between the first water outlet 811 and the second water outlet 812 in the vertical direction. Both ends of the air supply pipe 82 are fixed to the side walls of both ends of the heat exchange box 81, respectively, the second outlet end of the first three-way valve 4 is communicated with the end close to the air supply pipe 82, and the other end of the air supply pipe 82 is communicated with the inlet end of the first three-way valve 4.

Referring to fig. 3, the second heat exchange unit 9 has the same structure as the first heat exchange unit 8, and the first water outlet 811 of the heat exchange tank 81 in the second heat exchange unit 9 is located on the side wall of the corresponding heat exchange tank 81 remote from the water storage tank 7. One end of a gas supply pipe 82 in the second heat exchange unit 9 is connected with the second gas outlet pipe 32, the other end of the gas supply pipe 82 is connected with a third three-way valve 6, one outlet end of the third three-way valve 6 is communicated with the second mouthpiece 12, and the other outlet end of the third three-way valve 6 is directly communicated with the outside.

Referring to fig. 1 and 4, the water storage tank 7 is provided with a water return pipe 73 and a water delivery pipe 72, one end of the water delivery pipe 72 is connected to the water pump 71 and water is pressed into the water delivery pipe 72 by the water pump 71, the other end of the water delivery pipe 72 passes through the upper part of the heat exchange tank 81 in the first heat exchange unit 8 and then is positioned above the heat exchange tank 81 in the second heat exchange unit 9, and a support frame for supporting the water delivery pipe 72 is fixed between the two heat exchange tanks 81. The water pipe 72 is provided with a valve for controlling opening and closing. The water pipe 72 is provided with two water inlets for respectively injecting water to the two heat exchange boxes 81. One end of the water return pipe 73 is communicated with the water storage tank 7, the other end of the water return pipe 73 is bent upwards and then horizontally penetrates through the side wall of the support 13 and finally is located below the two heat exchange tanks 81, four water return branch pipes 731 are arranged at the end part of the water return pipe 73, every two water return branch pipes 731 are respectively connected to the two heat exchange tanks 81, and the two water return branch pipes 731 of the same group are respectively connected to the first water outlet 811 and the second water outlet 812 of the corresponding heat exchange tank 81.

In actual operation, the whole air compressor has two using states. The first state: the first mouthpiece 11 and the first outlet duct 22 are communicated by the first three-way valve 4, the low-pressure compressor 2 and the high-pressure compressor 3 are both in one-stage compression, the air supply amount in the air storage tank 1 is large, and the air pressure is relatively low. At this time, the heat generated by the low-pressure compressor 2 and the high-pressure compressor 3 is not high, and certain heat dissipation can be performed by the cooling fins and the ventilation hood on the compressors, so that the water pump 71 does not need to be started. And a second state: the first three-way valve 4 is used for communicating the first air outlet pipe 22 with the second air inlet pipe 31, the low-pressure compressor 2 is used for providing compressed air after primary compression for the high-pressure compressor 3, the high-pressure compressor 3 is used for secondary compression, the pressure of the compressed air discharged into the air storage tank 1 is high, and the air displacement is relatively small. At this time, the heat generated by the high-pressure compressor 3 is large, the water pump 71 is started, the two heat exchange boxes 81 are filled with water, and the inlet air and the outlet air of the high-pressure compressor 3 are both cooled by water to a certain extent, so that the temperature of the compressed air is reduced. In any state of the air compressor, after the air compressor is stopped, the compressed air retained in the pipeline needs to be discharged to the outside through the second three-way valve 5 and the third three-way valve 6, so that the whole air compressor can be started without load when the air compressor is restarted.

The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.