TWI554677B - Automatic oil recovery system - Google Patents

Description

Automatic oil recovery system

The present invention relates to an air compressor, and more particularly to an automatic oil recovery system.

The lubricating oil in a crankcase of a conventional air compressor is often discharged to the outside of the crankcase during the operation of the compressor, so that not only the lubricating oil in the crankcase is consumed. It also causes environmental problems of air pollution. In addition, although some operators try to recover the leaked lubricating oil by installing a separate oil collecting barrel, this kind of recycling method has to wait for the oil collecting barrel to be filled. After the compressor is stopped, the recovered lubricating oil is manually returned to the crankcase. Therefore, it is not only inconvenient to use, but also cannot automatically replenish the leaked lubricating oil to the crankshaft. box.

Accordingly, it is an object of the present invention to provide an automatic lubricating oil recovery system that automatically recovers leaked lubricating oil.

Therefore, the automatic lubricating oil recovery system of the present invention comprises an input side pipeline, a compressor, a recovery unit, an intake switching valve, and a bleed switching valve. The compressor is in communication with the input side line and has a crankcase. The recovery unit has a ventilation combination, a connection with the crankcase An oil collection combination that is connected to the input side conduit and selectively communicates with the crankcase, and a communication line that communicates the combination of the ventilation and the oil collection. The intake switching valve is serially connected to the input side pipeline and located upstream of the compressor, and the intake switching valve is switchable between a blocking state and a communicating state. The bleed switching valve is serially connected to the input side pipeline and located upstream of the oil collecting combination, and the bleed switching valve is switchable between a blocking state and a communicating state, when the bleed switching valve is switched to In the blocking state and the intake switching valve is switched to the connected state, the oil collecting combination is not in communication with the crankcase, when the bleed switching valve is switched to the connected state and the intake switching valve is switched to the blocking In the state, the oil collection is in communication with the crankcase.

The utility model has the advantages that: the ventilation combination is combined with the oil collection to cooperate with the switching operation of the bleeder switching valve and the intake switching valve, and the lubricating oil leaking from the crankcase along with the breathing air is automatically recovered to the set The oil body is stored and the lubricant is automatically returned to the crankcase in real time.

10‧‧‧Input side piping

62‧‧‧Filter

11‧‧‧First pipe section

621‧‧‧Main airway

12‧‧‧Second section

622‧‧‧Connected air holes

121‧‧‧ branch point

63‧‧‧ Oil shield

20‧‧‧Compressor

631‧‧‧ top wall

21‧‧‧ crankcase

632‧‧‧ Around the wall

22‧‧‧Motor

64‧‧‧Filter components

23‧‧‧Piston cylinder

65‧‧‧Filter

30‧‧‧Separator

651‧‧‧Ventinel

31‧‧‧Automatic drain valve

66‧‧‧ pipe joint

32‧‧‧ throttle valve

70‧‧‧ oil collection

40‧‧‧Output side piping

71‧‧‧ Oil collecting body

42‧‧‧ gas storage tank unit

711‧‧‧ Oil drain

44‧‧‧ check valve

712‧‧‧ Oil collection space

50‧‧‧Recycling unit

713‧‧‧Stop shoulder

52‧‧‧Intake switching valve

714‧‧‧ inner circumference

54‧‧‧Release switching valve

72‧‧‧Backstop

60‧‧‧ ventilation combination

721‧‧‧ cock

61‧‧‧ ventilation body

722‧‧‧stop block

611‧‧‧First air hole

723 ‧ ‧ spring

612‧‧‧second vent

724‧‧‧Segage

613‧‧‧ accommodating space

725‧‧‧ shaft segment

726‧‧‧ oil drain

500‧‧‧Lubricating oil

73‧‧‧ pipe connection

731‧‧‧ escape route

732‧‧‧ escape hole

733‧‧‧ Large diameter section

734‧‧‧Small path

735‧‧‧ ring shoulder

74‧‧‧ balls

75‧‧‧Filter

751‧‧‧Ventinel

76‧‧‧First pipe joint

761‧‧ ‧ inner end

77‧‧‧Second pipe joint

80‧‧‧Connected pipeline

100‧‧‧air pressure source

200‧‧‧Low air

300‧‧‧ breathing air

400‧‧‧ Breathing air

Other features and advantages of the present invention will be apparent from the embodiments of the present invention. FIG. 1 is a front view of a preferred embodiment of the automatic lubricating oil recovery system of the present invention; FIG. 3 is a cross-sectional view of a venting assembly of the preferred embodiment; FIG. 5 is a cross-sectional view of an oil collecting assembly of the preferred embodiment; FIG. Figure 6 is a cross-sectional view taken along line VI-VI of Figure 5; Figure 7 is a view similar to Figure 3, illustrating a bleeder switching valve and an intake switching valve of the preferred embodiment respectively switched to a blocking state and a communicating state; Figure 8 is a partial combined sectional view, illustrating The oil and gas of a crankcase of the preferred embodiment flows from the venting combination to the oil collecting combination; FIG. 9 is a view similar to FIG. 6 illustrating the flow of oil and gas into the oil collecting assembly; FIG. 10 is a view similar to FIG. The view shows that the bleed switching valve and the intake switching valve are respectively switched to a connected state and a blocked state; FIG. 11 is a partial combined sectional view showing that low pressure air flows into the oil collecting assembly, and the recovered lubricating oil is returned to the same. Inside the crankcase; and Figure 12 is a view similar to Figure 6, illustrating the flow of low pressure air into the oil collection.

Referring to Figures 1, 2 and 3, a preferred embodiment of the automatic lubricating oil recovery system of the present invention can be used in connection with an air pressure source 100. The automatic lubricating oil recovery system comprises: an input side pipeline 10. A compressor 20, a separator 30, a throttle valve 32, an output side line 40, a gas storage tank unit 42, a check valve 44, a recovery unit 50, an intake switching valve 52, and A bleed switching valve 54 is provided. The recovery unit 50 has a ventilation assembly 60, an oil collection assembly 70, and a communication line 80.

The input side line 10 has a first pipe section 11 communicating with the compressor 20, and a second pipe section 12 branched between the first pipe section 11 and the oil collection assembly 70. In this embodiment, The first pipe section 11 and The air pressure source 100 is in communication.

The compressor 20 is in communication with the first pipe section 11 of the input side line 10. The compressor 20 has a crankcase 21, a drive motor 22, and a plurality of valves respectively disposed in the crankcase 21 and connected to the first pipe section 11. Piston cylinder 23. In the present embodiment, the low-pressure air outputted by the air pressure source 100 is compressed into the piston cylinders 23 via the first pipe section 11 and then sent to the air-storage tank unit 42 via the output side line 40. In addition, it can be understood that during operation of the compressor 20, the lubricating oil in the crankcase 21 flows to the venting combination 60 along with the breathing air of the crankcase 21 to form oil and gas.

The separator 30 is connected in series to the first pipe section 11 and is located upstream of a branch point 121 of the first pipe section 11 . In the present embodiment, the separator 30 can initially filter the low-pressure air output by the air pressure source 100 and has an automatic drain valve 31.

The throttle valve 32 is connected in series with the second pipe section 12 and is interposed between the bleeder switching valve 54 and the oil collection combination 70.

The output side line 40 is in communication with the piston cylinder 23 of the compressor 20. The air tank unit 42 is in communication with the output side line 40. The check valve 44 is connected in series with the output side line 40 and between the compressor 20 and the air tank unit 42. The check valve 44 prevents gas from flowing from the gas storage tank unit 42 to the compressor 20.

As shown in FIGS. 3 and 4, the ventilation assembly 60 is in communication with the crankcase 21 (see FIG. 1). The ventilation assembly 60 has a ventilation body 61, a filter 62 disposed in the ventilation body 61, and a Venting body An oil retaining cover 63 in the 61, a filter element 64 disposed in the ventilation body 61, a filter 65 disposed in the ventilation body 61, and a filter 65 disposed in the ventilation body 61 and connected to the communication line 80 Connected pipe joint 66.

The ventilation body 61 has a first air hole 611 communicating with the crankcase 21 (see FIG. 1), a second air hole 612 opposite to the first air hole 611, and a gap between the first and second air holes 611 and 612. And a receiving space 613 that communicates with the connecting pipe 80 via the pipe joint 66.

The filter 62 has a main air passage 621 communicating with the first air hole 611, and a plurality of communicating air holes 622 communicating with the main air passage 621 and the accommodating space 613, respectively.

The oil hood 63 has a top wall 631 abutting the top end of the filter 62, and a surrounding wall 632 extending downward from the periphery of the top wall 631 and surrounding the communicating air holes 622.

The filter element 64 abuts between the top wall 631 and the second air hole 612. In this embodiment, the filter element 64 is a porous material.

The filter 65 is disposed in the second air hole 612 and has a vent hole 651 communicating with the second air hole 612. The filter 65 filters the gas flowing therethrough.

As shown in Figures 3, 5 and 6, the oil collection assembly 70 is in communication with the input side line 10 and is selectively in communication with the crankcase 21 (see Figure 1). The oil collection assembly 70 has an input side The second pipe section 12 of the pipeline 10 and the oil collecting body 71 communicating with the communication pipe 80, a check device 72 interposed between the oil collecting body 71 and the crankcase 21 (see FIG. 1), The oil collecting body 71 is opposite to the pipe connection 73 of one end of the backstop device 72, and a setting a ball 74 in the pipe joint 73, a filter 75 disposed on the pipe joint 73, a first pipe joint 76 disposed on the oil collecting body 71, and a second pipe disposed on the oil collecting body 71. Pipe joint 77.

The oil collecting body 71 has an oil draining pipe 711 communicating with the crankcase 21 (see FIG. 1), an oil collecting space 712 connected to the oil draining pipe 711, and an oil draining pipe 711 and the oil collecting pipe. A stop shoulder 713 between the spaces 712, and an inner peripheral surface 714 surrounding the oil collection space 712.

The backstop device 72 prevents gas from flowing from the crankcase 21 (see FIG. 1) toward the oil collecting body 71. The backstop device 72 has a pressure plug 721 disposed in the oil drain pipe 711, and a draining valve 711 is disposed in the oil draining body 711. a stop block 722 in the pipe 711 between the press plug 721 and the stop shoulder 713, and a gap between the press plug 721 and the stop block 722 and abutting the stop block 722 The spring 723 of the stop shoulder 713. In this embodiment, the pressure plug 721 has a plug section 724 located at the oil drain pipe 711, and a shaft section 725 extending from the plug section 724. The pressure plug 721 has a number and a drain pipe 711 respectively. The oil drain hole 726 is connected to the shaft section 725. The spring 723 abuts between the shaft section 725 and the leak stop block 722.

The pipe joint 73 is connected to the oil collecting space 712 and has an escape passage 731 and an escape hole 732 communicating with the escape passage 731 and the oil collecting space 712. In this embodiment, the escape path 731 has a large diameter section 733 communicating with the filter 75, a small diameter section 734 communicating with the escape hole 732, and a large and small diameter section 733, Ring shoulder 735 between 734.

The ball 74 is movably disposed on the large diameter of the escape passage 731 In the segment 733, in the present embodiment, the ball 74 can be parked on the ring shoulder 735 in an unvented state.

The filter 75 has a vent 751 communicating with the large diameter section 733 of the escape passage 731, and the filter 75 filters the gas flowing therethrough.

The first pipe joint 76 communicates with the communication pipe 80 and the oil collecting space 712. The first pipe joint 76 has an inner end portion 761 extending into the oil collecting space 712, and the inner end portion 761 is adjacent to the inner pipe portion 761. The circumferential surface 714 faces the inner circumferential surface 714.

The second pipe joint 77 is connected to the second pipe section 12 of the input side pipe 10 to communicate with the oil collecting space 712.

As shown in FIGS. 3, 4, and 5, the communication line 80 communicates with the venting assembly 60 and the oil collection assembly 70. In the present embodiment, the communication line 80 communicates with the accommodating space 613 via the pipe joint 66. The communication pipe 80 communicates with the oil collecting space 712 via the first pipe joint 76.

As shown in FIG. 2 and FIG. 3, the intake switching valve 52 is connected in series to the first pipe section 11 of the input side pipe 10, and is located downstream of the branching point 121 of the first pipe section 11 and the second pipe section 12 Upstream of the compressor 20, the intake switching valve 52 is switchable between a blocking state (see Fig. 10) and a communicating state (see Fig. 7). In the present embodiment, the intake switching valve 52 is a solenoid valve.

As shown in FIG. 2 and FIG. 3, the bleeder switching valve 54 is connected in series to the second pipe section 12 of the input side pipe 10 and is located upstream of the oil collecting assembly 70. The bleed switching valve 54 can be blocked at one time. State (see Figure 7) with a connection Switch between states (see Figure 10). In the present embodiment, the bleeder switching valve 54 is a solenoid valve, and the time during which the bleeder switching valve 54 is maintained in the blocked state and the connected state can be controlled by an automatic control manner according to actual needs.

Thereby, as shown in FIGS. 7, 8, and 9, when the bleeder switching valve 54 is switched to the blocking state and the intake switching valve 52 is switched to the connected state, the low pressure air 200 output by the air pressure source 100 The first pipe section 11 flows into the compressor 20 via the separator 30 and the intake switching valve 52 for compression, and then flows along the output side line 40 through the check valve 44 into the gas storage tank unit 42 for storage. At this time, from the crankcase 21 (see FIG. 1), the lubricating air 300 of the filter 62 flows into the filter 62 through the first air hole 611 of the ventilation body 61, and when the filter 62 flows out, the breathing air 300 The lubricating oil inside is initially attached to the outer surface of the filter 62 to drip downward; then, when the breathing air 300 hits the surrounding wall 632 of the oil retaining cover 63, the lubricating oil in the breathing air 300 is further adhered to The inner surface of the surrounding wall 632 is dripped downward to allow the lubricating oil to converge on the bottom side of the accommodating space 613. It is understood that the filter element 64 increases the discharge of the breathing air 300 from the second air hole 612. Resistance, which may cause the breathing air 300 to converge on the bottom side of the accommodating space 613 The lubricating oil is injected into the oil collecting space 712 of the oil collecting body 71 via the pipe joint 66, the connecting pipe 80, and the first pipe joint 76. The inner end portion 761 of the first pipe joint 76 can guide the breathing air. 300 collides with the inner circumferential surface 714 of the oil collecting body 71, and the lubricating oil 500 in the breathing air 300 is attached to the inner circumferential surface 714 to converge downwardly on the bottom side of the oil collecting space 712; Call within oil space 712 The air suction 300 causes the ball 74 to float upward slightly. The ball 74 does not block the vent hole 751 from communicating with the escape passage 731, so that the breathing air 300 flowing into the oil collecting space 712 passes through the pipe connection 73. The cleaner 75 is discharged to the outside world.

While the lubricating oil 500 is condensed in the oil collecting space 712, the crankcase 21 (see FIG. 1) flows into the exhaust air in the oil discharge pipe 711 of the oil collecting body 71 through the oil drain hole 726 of the pressure plug 721. 400, the spring 723 of the backstop device 72 is assisted to push the stop block 722 upward to abut against the stop shoulder 713, so that the stop block 722 blocks the oil drain pipe 711 and the oil collecting space. 712 is connected, that is, the backstop device 72 blocks the oil collecting space 712 of the oil collecting body 71 from communicating with the crankcase 21 (see FIG. 1), so that the recovered lubricating oil 500 can be temporarily stored in the oil collecting. Within space 712.

As shown in FIGS. 10, 11, and 12, when the bleeder switching valve 54 is switched to the communication state and the intake switching valve 52 is switched to the blocking state, the low-pressure air 200 outputted by the air pressure source 100 is along the edge. After the first pipe section 11 passes through the separator 30, the oil collecting space flowing along the second pipe section 12 through the bleeder solenoid valve 54, the throttle valve 32, and the second pipe joint 77 flows into the oil collecting body 71. 712, at this time, the low-pressure air 200 flowing into the oil collecting space 712 causes the ball 74 to float up to abut against the bottom end of the filter 75, and the ball 74 blocks the vent hole 751 and the pipe connection 73. The escape passage 731 is in communication, and at the same time, the low-pressure air 200 flowing into the oil collection space 712 depresses the leak stop block 722 of the leak stop device 72, and the leak stop block 722 is disengaged from the leak stop shoulder 713. The oil draining pipe 711 is in communication with the oil collecting space 712. Thus, the oil collecting space 712 can pass through the oil draining pipe 711 and the backstop device. The oil drain hole 726 of the 72 is in communication with the crankcase 21 (see FIG. 1), and the lubricating oil 500 (see FIG. 8) recovered in the oil collecting space 712 is returned to the crankcase 21 (see FIG. 1). During use, excess low-pressure air 200 in the oil collection space 712 flows into the ventilation body 61 through the first pipe joint 76, the communication pipe 80, and the pipe joint 66, and from the filter 65. Discharge to the outside world.

Through the above description, the advantages of the present invention can be further summarized as follows:

1. The present invention utilizes the venting assembly 60 in conjunction with the oil collection assembly 70 to cooperate with the automatic switching operation of the bleeder switching valve 54 and the intake switching valve 52, which may follow the crankcase 21 for a predetermined time interval. The lubricating oil leaking out of the breathing air 300 is automatically recovered and stored in the oil collecting body 71, and after the lubricating oil is recovered, the lubricating oil is automatically returned to the crankcase 21 for use, which is compared with the prior art. The invention is not only quite convenient in use, but also can automatically replenish the leaked lubricating oil into the crankcase 21 in an instant, thereby effectively improving the recovery efficiency of the lubricating oil.

2. The invention can reduce the environmental protection problem that the lubricating oil in the crankcase 21 is accompanied by the leakage of the breathing air 300 and effectively improve the air pollution.

In summary, the automatic lubricating oil recovery system of the present invention is not only convenient to use, but also can automatically recover the lubricating oil into the crankcase for reuse, so that the object of the present invention can be achieved.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and repair according to the scope of the patent application and the patent specification of the present invention. Decorations are still within the scope of the invention patent.

10‧‧‧Input side piping

52‧‧‧Intake switching valve

11‧‧‧First pipe section

54‧‧‧Release switching valve

12‧‧‧Second section

60‧‧‧ ventilation combination

121‧‧‧ branch point

61‧‧‧ ventilation body

20‧‧‧Compressor

65‧‧‧Filter

30‧‧‧Separator

70‧‧‧ oil collection

31‧‧‧Automatic drain valve

71‧‧‧ Oil collecting body

32‧‧‧ throttle valve

72‧‧‧Backstop

40‧‧‧Output side piping

75‧‧‧Filter

42‧‧‧ gas storage tank unit

80‧‧‧Connected pipeline

44‧‧‧ check valve

100‧‧‧air pressure source

50‧‧‧Recycling unit

Claims (10)

An automatic lubricating oil recovery system comprising: an input side pipeline; a compressor connected to the input side pipeline and having a crankcase; a recovery unit having a ventilation combination and a communication connected to the crankcase An oil collecting combination on the input side pipeline and selectively communicating with the crankcase, and a communication pipeline connecting the ventilation combination and the oil collecting combination; an intake switching valve serially connected to the input side pipeline And located upstream of the compressor, the intake switching valve is switchable between a blocking state and a communicating state; and a bleed switching valve is connected in series to the input side pipeline and located in the oil collecting combination Upstream, the bleed switching valve is switchable between a blocking state and a communicating state, and when the bleed switching valve is switched to the blocking state and the intake switching valve is switched to the communicating state, the oil collecting The combination is not in communication with the crankcase, and the oil collection combination is in communication with the crankcase when the bleed switching valve is switched to the communication state and the intake switching valve is switched to the blocking state. The automatic lubricating oil recovery system of claim 1, wherein the oil collecting assembly has an oil collecting body communicating with the input side pipe and the communication pipe, and an oil collecting body and the crankcase a backstop device for preventing gas from flowing from the crankcase toward the oil collecting body, when the bleed switching valve is switched to the blocking state and the intake switching valve is cut When the switching state is changed, the backstop device blocks the oil collecting body from communicating with the crankcase, and when the bleed switching valve is switched to the connected state and the intake switching valve is switched to the blocking state, the reverse The stopping device does not block the oil collecting body from communicating with the crankcase, and the oil collecting body communicates with the crankcase via the backstop device. The automatic lubricating oil recovery system of claim 2, wherein the oil collecting body has an oil draining pipe communicating with the crankcase, an oil collecting space connected to the oil draining pipe, and a draining oil defined a stop shoulder between the pipe and the oil collecting space, the input side pipe and the communication pipe are connected to the oil collecting space, the backstop device has a pressure plug disposed in the oil drain pipe, and a a leak stop block between the pressure plug and the leak stop shoulder, and a gap between the pressure plug and the stop block and abutting the stop block to the leak stop a spring of the shoulder having at least one oil drain hole communicating with the oil drain pipe, the oil collecting combination further having an end disposed on the oil collecting body opposite to the backstop device and communicating with the oil collecting space a pipe joint, a ball disposed in the pipe joint, and a filter disposed on the pipe joint, the pipe joint having an escape passage, and an escape hole connecting the escape passage and the oil collection space, a ball is movably disposed in the escape passage, the filter having a vent communicating with the escape passage When the bleed switching valve is switched to the blocking state and the intake switching valve is switched to the connected state, the ball does not block the vent hole from communicating with the escape passage, and the leak stop block blocks the drain pipe Communicating with the oil collecting space, when the bleed switching valve is switched to the connected state and the intake switching valve is switched to the blocking state, the ball blocks the vent hole from communicating with the air escaping channel The leak stop block disengages the leak stop shoulder to connect the oil drain pipe to the oil collection space. The automatic lubricating oil recovery system of claim 3, wherein the pressure plug has a plug portion located at the oil drain pipe and a shaft segment extending from the plug portion, the oil drain hole being formed in the plug a segment, the stop block is movably disposed on the shaft segment, the spring abuts between the shaft segment and the stop block, the escape item has a large diameter section communicating with the vent hole, and the escape a small diameter section communicating with the air hole, and a ring shoulder defined between the large and small diameter sections, the ball is movably disposed in the large diameter section, and the ball is parked in the ring in an unventilated state Shoulder. The automatic oil recovery system of claim 3, wherein the oil collection combination further has a first pipe joint disposed on the oil collecting body and communicating the communication pipe and the oil collecting space, the first pipe joint There is an inner end portion extending into the oil collecting space, and the oil collecting body further has an inner circumferential surface surrounding the oil collecting space, the inner end portion being adjacent to the inner circumferential surface and facing the inner circumferential surface. The automatic lubricating oil recovery system of claim 2, wherein the ventilation assembly has a ventilation body, a filter disposed in the ventilation body, an oil hood disposed in the ventilation body, and a ventilation a filter element disposed in the body, and a filter disposed on the ventilation body, the ventilation body has a first air hole communicating with the crankcase, a second air hole opposite to the first air hole, and a middle portion An accommodating space between the first and second air holes and communicating with the communication pipe, the filter has a main air passage communicating with the first air hole, and the plurality of main air passages are connected to the accommodating a connecting air hole of the space, the oil retaining cover has a top wall abutting the top end of the filter, and a surrounding wall extending downward from the peripheral edge of the top wall and surrounding the connecting air holes, the filter element abutting Between the top wall and the second air hole, the filter is disposed in the second air hole and has a vent hole communicating with the second air hole. The automatic lubricating oil recovery system of claim 2, further comprising an output side line communicating with the compressor, a gas storage tank unit communicating with the output side line, and a series connected to the output side tube The check valve is interposed between the compressor and the gas storage tank unit, and the check valve prevents gas from flowing from the gas storage tank unit to the compressor. The automatic lubricating oil recovery system of claim 1, wherein the input side line has a first pipe section in communication with the compressor, and a branch is connected between the first pipe section and the oil collection combination In the second pipe section, the intake switching valve is serially connected to the first pipe section, and the second pipe section is downstream of a branch point of the first pipe section, and the bleed switching valve is serially connected to the second pipe section. The automatic lubricating oil recovery system of claim 8, further comprising a throttle valve serially connected to the second pipe section and interposed between the bleeder switching valve and the oil collection combination. The automatic lubricating oil recovery system of claim 8, further comprising a separator connected in series to the first pipe section and located upstream of the branching point of the first pipe section.