Automatic air source switching device and double-air-source pneumatic pump control system

Abstract

The utility model relates to the technical field of pneumatic control, solves the problem that in the prior art, work of a double-air-source pneumatic pump needs to completely depend on a power source, and discloses an automatic air source switching device and a double-air-source pneumatic pump control system.The automatic air source switching device comprises a pump air source control device, and the pump air source control device comprises a first valve body and a second valve body; the pneumatic timing device comprises a driving shaft and a driven shaft, a driving blade is installed at one end of the driving shaft, an air injection device is arranged on one side of the driving blade, airflow or compressed air provided by an air source is used for driving a pneumatic timer, and then the pneumatic timer is used for driving position switching of the first valve element and the second valve element. The purpose of regularly switching the driving air sources of the double-air-source pneumatic pump is achieved, so that the purpose of regularly switching the driving air sources of the double-air-source pneumatic pump can be achieved under the condition that power is not supplied through a power source.

Description

Technical Field

[0001] The present application relates to the field of pneumatic control technology, and in particular to an automatic air source switching device and a dual-air source pneumatic pump control system. Background Art

[0002] As the name suggests, a dual-source pneumatic pump is a pneumatic pump that uses two air sources (compressed air or gas) as its power source. It uses the energy of compressed air to pump liquid out, achieving liquid transportation. The working principle of a dual-source pneumatic pump is similar to that of a conventional pneumatic pump, both of which use the energy of compressed air or gas to pump liquid out. The difference is that a dual-source pneumatic pump uses two air sources and may achieve higher work efficiency and performance through different methods (such as series connection, parallel connection, etc.). When compressed air enters the pneumatic pump, it converts the air energy into mechanical energy, thereby driving the operation of the liquid pump. The air or gas drives the piston in the liquid pump to move, generating the power to pump the liquid.

[0003] In the existing technology, the dual-source pneumatic pump must be driven by a solenoid valve, and the operation of the solenoid valve must rely on power supply. In the event of a power outage or no power supply, the dual-source pneumatic pump cannot continue to work. As a result, the existing dual-source pneumatic pump system is greatly affected by the power supply in the environment. Once the power is cut off, the dual-source pneumatic pump cannot continue to work. Utility Model Content

[0004] The purpose of the present application is to overcome the problem in the prior art that the operation of a dual-source pneumatic pump needs to be completely dependent on power supply, and to provide an automatic air source switching device and a dual-source pneumatic pump control system.

[0005] In a first aspect, an automatic gas source switching device is provided, comprising: a pump gas source control device, the pump gas source control device comprising a first valve body and a second valve body;

[0006] A first valve core is installed in the first valve body and can move back and forth. A first return spring is installed on the outer wall of the first valve core. The first valve body is provided with a first opening, a second opening and a first air inlet. When the first valve core is in the first position, the first opening is connected to the second opening. When the first valve core is in the second position, the first opening is connected to the first air inlet.

[0007] A second valve core is mounted in the second valve body and is reciprocatable. A second return spring is mounted on the outer wall of the second valve core. The second valve body is provided with a third port, a fourth port, and a second air inlet. When the second valve core is in the third position, the third port is connected to the fourth port. When the second valve core is in the fourth position, the third port is connected to the second air inlet.

[0008] A pneumatic timing device, the pneumatic timing device includes a driving shaft and a driven shaft, a driving blade is installed at one end of the driving shaft, and an air jet device is provided on one side of the driving blade. A driving wheel is installed on the outer wall of the driving shaft, and a driven wheel is installed on the outer wall of the driven shaft. The driving wheel and the driven wheel are driven by a steel belt. The outer wall of the driven shaft is fixed with two cams with opposite protrusions. The first valve core is fitted with the outer wall of one of the cams under the action of a first return spring, and the second valve core is fitted with the outer wall of the other cam under the action of a second return spring. The cam is used to drive the first valve core to switch between the first position and the second position, and is also used to drive the second valve core to be determined between the third position and the fourth position, and when the first valve core is in the first position, the second valve core is in the fourth position.

[0009] In some possible implementations, the driving wheel includes a first fixed limiting portion and a first movable limiting portion, the first fixed limiting portion is fixedly sleeved on the outer wall of the driving shaft, the first movable limiting portion is slidably sleeved on the outer wall of the driving shaft, a first externally threaded cylinder is fixed on one side of the first movable limiting portion, the outer wall of the first externally threaded cylinder is threadedly connected to the first internally threaded cylinder, one end of the first externally threaded cylinder is fixed with a first adjusting shaft, the outer wall of the first adjusting shaft is fixedly sleeved with a first transmission wheel and a second transmission wheel, the first transmission wheel is connected to the rotating shaft of the third transmission wheel through a belt transmission and is installed with a timing rotating wheel, the second transmission wheel is connected to the fourth transmission wheel through a belt transmission, the rotating shaft of the fourth transmission wheel is fixedly installed with a fifth transmission wheel, the fifth transmission wheel is connected to the sixth transmission wheel through a belt transmission, and the rotating shaft of the sixth transmission wheel is fixedly connected to the second externally threaded cylinder. The outer wall of the second externally threaded cylinder is threadedly connected to a second internally threaded cylinder, and the driven wheel includes a second fixed limiting portion and a second movable limiting portion, the second fixed limiting portion is fixedly sleeved on the outer wall of the driven shaft, and the second movable limiting portion is slidably sleeved on the outer wall of the driven shaft, one end of the second externally threaded cylinder is fixedly connected to the second movable limiting portion, and the distance between the ends of the driving wheel and the driven wheel can be adjusted by the timing wheel, so that the rotation radius of the two ends of the steel belt changes, and then the transmission ratio between the driving shaft and the driven shaft can be adjusted, so as to achieve the purpose of adjusting the rotation speed of the cam, and the frequency of the cam pressing the first valve core and the second valve core within a certain period of time can be adjusted, that is, by rotating the timing wheel, the time interval for the position switching of the first valve core and the second valve core can be adjusted, wherein the time interval for the position switching of the first valve core and the second valve core is 0.1-3 seconds.

[0010] In some possible implementations, the jet device is connected to an air source, and a pressure reducing regulator is provided between the jet device and the air source. The gas provided by the air source is sprayed from the jet device onto the drive blades, thereby driving the drive blades and the active shaft to rotate. By providing the pressure reducing regulator, the air pressure can be stabilized at a preset air pressure value by reducing the air pressure, thereby making the rotation speed of the drive blades relatively stable and less prone to fluctuations, making the intake and exhaust switching time of the pump air source control device more accurate.

[0011] In some possible implementations, a driving device is also included, which includes a third valve body, in which a third valve core that can move back and forth is installed, and the third valve body is provided with a fifth port, a sixth port and a seventh port. When the third valve core is in the fifth position, the fifth port is connected to the sixth port, and when the third valve core is in the sixth position, the fifth port is connected to the seventh port. The first air inlet and the second air inlet are both connected to the seventh port, and the gas supplied by the air source can be manually switched to the pump air source control device through the driving device.

[0012] In the second aspect, a dual-source pneumatic pump control system is provided, comprising an automatic air source switching device as described in any one of the implementation methods of the first aspect, and also comprising a pump air source control solenoid valve, the eighth port and the ninth port of the pump air source control solenoid valve being connected to the two air vents of the dual-source pneumatic pump respectively, the tenth port of the pump air source control solenoid valve being connected to the first port, the eleventh port of the pump air source control solenoid valve being connected to the third port, the third air inlet of the pump air source control solenoid valve being connected to the sixth port, and the first air inlet and the second air inlet being both connected to the seventh port.

[0013] In some possible implementations, the dual-source pneumatic pump includes a cavity, which is divided into a first air chamber and a second air chamber by a piston. The first air chamber is provided with an air vent. By filling gas into the air vent of the first air chamber, the piston can be pushed toward the second air chamber, and the air in the second air chamber is discharged from the air vent of the second air chamber. Similarly, by filling gas into the air vent of the second air chamber, the piston can be pushed toward the first air chamber, and the air in the first air chamber is discharged from the air vent of the first air chamber, thereby converting air energy into mechanical energy, thereby driving the operation of the liquid pump and generating power for pumping liquid.

[0014] In some possible implementations, the pump air source control solenoid valve includes a fourth valve body, a fourth valve core that can move back and forth is provided in the fourth valve body, and electromagnetic driving devices are provided at both ends of the fourth valve body. The valve body is provided with an eighth port, a ninth port, a tenth port, an eleventh port and a third air inlet. When the fourth valve core is in the seventh position, the eighth port is connected to the tenth port, and the ninth port is connected to the third air inlet. When the fourth valve core is in the eighth position, the eighth port is connected to the third air inlet, and the ninth port is connected to the eleventh port. The electromagnetic driving device includes an electromagnet, and electromagnets are fixed at both ends of the fourth valve body. Iron sheets that cooperate with the electromagnets are fixed at both ends of the fourth valve core. By controlling the power on and off of the electromagnets at both ends, the fourth valve body can be switched back and forth between the seventh position and the eighth position, so that the third air inlet is connected to the eighth port or the third air inlet is connected to the ninth port, thereby achieving the effect of alternating air intake and exhaust of the two air ports of the dual-air source pneumatic pump.

[0015] The present application has the following beneficial effects: in the present application, the air flow or compressed air provided by the air source is used to drive the pneumatic timer, and then the position switching of the first valve core and the second valve core is driven by the pneumatic timer to achieve the purpose of timed switching of the dual-source pneumatic pump driving air source, so that the purpose of timed switching of the dual-source pneumatic pump driving air source can be achieved without the help of power supply, thereby increasing the forced supply capacity of the dual-source pneumatic pump liquid supply system, and it can be manually switched whether the dual-source pneumatic pump driving air source is switched by the pump air source control device or by the pump air source control solenoid valve to switch the dual-source pneumatic pump driving air source, so that the control flexibility of the dual-source pneumatic pump is higher, and users can choose the control method according to their needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings that constitute a part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 1 is a schematic structural diagram of the gas source automatic switching device of Example 1 of the present application;

[0019] Figure 2 1 is a schematic structural diagram of the first valve body in the first position of the automatic gas source switching device of Example 1 of the present application;

[0020] Figure 3 This is a structural schematic diagram of the first valve body in the second position of the automatic gas source switching device of Example 1 of the present application;

[0021] Figure 4 Schematic diagram of the structure of the second valve body in the automatic gas source switching device of Example 1 of the present application;

[0022] Figure 5 1 is a schematic structural diagram of the driving device in the automatic gas source switching device of Example 1 of the present application;

[0023] Figure 6 This is a structural diagram of the pneumatic timing device in the automatic gas source switching device of Example 1 of the present application, in which the timing time interval is set to 3 seconds;

[0024] Figure 7 This is a structural diagram of the pneumatic timing device in the automatic gas source switching device of Example 1 of the present application, in which the timing time interval is set to 0.1 seconds;

[0025] Figure 8 1 is a schematic structural diagram of the cam in the automatic air source switching device of Example 1 of the present application;

[0026] Figure 9 2 is a schematic structural diagram of a dual-air source pneumatic pump control system according to Example 2 of the present application;

[0027] Figure 10 This is a schematic diagram of the structure of the pump air source control solenoid valve in the dual air source pneumatic pump control system of Example 2 of this application. Figure 1 ;

[0028] Figure 11 This is a schematic diagram of the structure of the pump air source control solenoid valve in the dual air source pneumatic pump control system of Example 2 of this application. Figure 2 .

[0029] Reference numerals:

[0030] 1. Pump air source control device; 2. First valve body; 21. First valve core; 22. First return spring; 23. First port; 24. Second port; 25. First air inlet; 3. Second valve body; 31. Second valve core; 32. Second return spring; 33. Third port; 34. Fourth port; 35. Second air inlet; 4. Pneumatic timing device; 401. Driving shaft; 402. Driven shaft; 403. Driving blade; 404. Driving wheel; 4041. First fixed limiter; 4042. First movable limiter; 405. Driven wheel; 4051. Second fixed limiter; 4052. Second movable limiter; 406. Cam; 407. Steel belt; 408. First externally threaded barrel; 409. First internally threaded barrel; 410. First adjusting shaft; 411. First transmission wheel; 412. Second transmission wheel; 413 , third transmission wheel; 414, fourth transmission wheel; 415, belt; 416, timing wheel; 417, fifth transmission wheel; 418, sixth transmission wheel; 419, second external threaded cylinder; 420, second internal threaded cylinder; 5, air source; 6, pressure reducing regulator; 61, jet device; 7, drive device; 71, third valve body; 72, third valve core; 73, fifth port; 74, sixth port; 75, seventh port; 8, pump air source control solenoid valve; 81, fourth valve body; 82, fourth valve core; 83, electromagnetic drive device; 831, electromagnet; 832, iron sheet; 84, eighth port; 85, ninth port; 86, tenth port; 87, eleventh port; 88, third air inlet; 9, dual-source pneumatic pump; 91, cavity; 92, first air chamber; 93, second air chamber; 94, piston; 95, air vent. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0034] Example 1

[0035] The gas source automatic switching device involved in Example 1 of the present application is as follows: Figure 1 As shown, it includes: a pump air source control device 1, the pump air source control device 1 includes a first valve body 2 and a second valve body 3, wherein the pump air source control device 1 is connected to the air source 5 of the dual-source pneumatic pump 9 and the dual-source pneumatic pump 9, and directly controls the switching operation of the air source 5 of the dual-source pneumatic pump 9.

[0036] like Figure 2-Figure 3 As shown, the arrow direction in the figure represents the gas flow direction. A first valve core 21 that can reciprocate is installed in the first valve body 2. A first return spring 22 is installed on the outer wall of the first valve core 21. The first valve body 2 is provided with a first opening 23, a second opening 24 and a first air inlet 25. When the first valve core 21 is in the first position, the first opening 23 is connected to the second opening 24. When the first valve core 21 is in the second position, the first opening 23 is connected to the first air inlet 25.

[0037] like Figure 6 As shown, a reciprocating second valve core 31 is installed in the second valve body 3, and a second return spring 32 is installed on the outer wall of the second valve core 31. The second valve body 3 is provided with a third port 33, a fourth port 34 and a second air inlet 35. When the second valve core 31 is in the third position, the third port 33 is connected to the fourth port 34. When the second valve core 31 is in the fourth position, the third port 33 is connected to the second air inlet 35.

[0038] like Figure 7-Figure 8As shown, the pneumatic timing device 4 includes a driving shaft 401 and a driven shaft 402, a driving blade 403 is installed at one end of the driving shaft 401, and an air injection device 61 is provided on one side of the driving blade 403, a driving wheel 404 is installed on the outer wall of the driving shaft 401, and a driven wheel 405 is installed on the outer wall of the driven shaft 402, and the driving wheel 404 and the driven wheel 405 are transmitted by a steel belt 407, and two cams 406 with opposite protrusions are fixedly sleeved on the outer wall of the driven shaft 402, and the first valve core 21 is in contact with the outer wall of one of the cams 406 under the action of the first return spring 22, and the second valve core 31 is in contact with the outer wall of the other cam 406 under the action of the second return spring 32, and the cam 406 is used to drive the first valve core 21 to switch between the first position and the second position, and also to drive the second valve core 31 to be determined between the third position and the fourth position, and when the first valve core 21 is in the first position, the second valve core 31 is in the fourth position.

[0039] like Figure 7-Figure 8As shown, the driving wheel 404 includes a first fixed limiting portion 4041 and a first movable limiting portion 4042, the first fixed limiting portion 4041 is fixedly sleeved on the outer wall of the driving shaft 401, the first movable limiting portion 4042 is slidably sleeved on the outer wall of the driving shaft 401, a first externally threaded cylinder 408 is fixed on one side of the first movable limiting portion 4042, the outer wall of the first externally threaded cylinder 408 is threadedly connected to the first internally threaded cylinder 409, one end of the first externally threaded cylinder 408 is fixed to the first adjusting shaft 410, the outer wall of the first adjusting shaft 410 is fixedly sleeved with a first transmission wheel 411 and a second transmission wheel 412, the first transmission wheel 411 is transmitted through a belt 415 The rotating shaft of the third transmission wheel 413 is installed with a timing rotating wheel 416, the second transmission wheel 412 is connected to the fourth transmission wheel 414 through a belt 415, the rotating shaft of the fourth transmission wheel 414 is fixedly installed with a fifth transmission wheel 417, the fifth transmission wheel 417 is connected to the sixth transmission wheel 418 through a belt 415, the rotating shaft of the sixth transmission wheel 418 is fixedly connected to a second externally threaded cylinder 419, the outer wall of the second externally threaded cylinder 419 is threadedly connected to the second internally threaded cylinder 420, the driven wheel 405 includes a second fixed limiting portion 4051 and a second movable limiting portion 4052, the second fixed limiting portion 4051 is fixedly sleeved on The outer wall of the driven shaft 402, the second movable limiting portion 4052 is slidably sleeved on the outer wall of the driven shaft 402, and one end of the second externally threaded cylinder 419 is fixedly connected to the second movable limiting portion 4052. The distance between the ends of the driving wheel 404 and the driven wheel 405 can be adjusted by the timing wheel 416, so that the rotation radius of the two ends of the steel belt 407 changes, and then the transmission ratio between the driving shaft 401 and the driven shaft 402 can be adjusted, so as to achieve the purpose of adjusting the rotation speed of the cam 406, and the frequency of the cam 406 pressing the first valve core 21 and the second valve core 31 within a certain period of time can be adjusted, that is, by rotating the timing wheel 416 , it is possible to adjust the time interval for the position switching of the first valve core 21 and the second valve core 31, wherein the time interval for the position switching of the first valve core 21 and the second valve core 31 is 0.1-3 seconds. According to the adjusted time interval, the pump air source control device 1 is switched according to the set time after operation. For example: if the time interval is set to 0.5 seconds, then 0-0.5 seconds: the first port 23 is connected to the second port 24, and the third port 33 is connected to the second air inlet 35; 0.5 seconds-1 second: the first port 23 is connected to the first air inlet 25, and the third port 33 is connected to the fourth port 34, thereby completing the air source 5 switching work of the dual-source pneumatic pump 9.

[0040] In the above embodiment, the inner sides of the first movable limiting portion 4042 and the second movable limiting portion 4052 are both configured to be truncated cone-shaped or conical structures, that is, they are in an enlarging or shrinking state. When the distance between the first movable limiting portion 4042 and the first fixed limiting portion 4041 is reduced, the steel belt 407 can be squeezed outward to increase the rotation radius of the steel belt 407 at the active shaft 401. At the same time, the distance between the second movable limiting portion 4052 and the second fixed limiting portion 4051 increases at the same speed, which can shrink the steel belt 407 inward to reduce the rotation radius of the steel belt at the driven shaft 402, thereby The driving shaft 401 rotates one circle and the driven shaft 402 can rotate more circles; similarly, when the distance between the first movable limit part 4042 and the first fixed limit part 4041 increases, the steel belt 407 can shrink inward to reduce the rotation radius of the steel belt 407 at the driving shaft 401. At the same time, the distance between the second movable limit part 4052 and the second fixed limit part 4051 decreases at the same speed, which can squeeze the steel belt 407 outward to increase the rotation radius of the steel belt at the driven shaft 402, so that the driving shaft 401 rotates one circle and the driven shaft 402 can rotate fewer circles.

[0041] When the timing wheel 416 is rotated counterclockwise, the first internally threaded cylinder 409 is fixed, and the timing wheel 416 drives the first externally threaded cylinder 408 to rotate through the first adjusting shaft 410. Since the first internally threaded cylinder 409 is fixed, the first externally threaded cylinder 408 is pushed to the left, thereby pushing the first movable limiter 4042 to move to the left, so that the groove spacing of the driving wheel 404 becomes narrower and the rotation radius of the steel belt 407 becomes larger. Figure 8 As shown, similarly, the second internally threaded cylinder 420 is fixed, the second externally threaded cylinder 419 moves to the left, the second movable limiting portion 4052 of the driven wheel 405 moves to the left, the groove of the driven wheel 405 becomes wider, the turning radius of the steel belt 407 becomes smaller, the transmission ratio between the driving shaft 401 and the driven shaft 402 changes, the rotation speed of the driven wheel 405 changes, the rotation speed of the cam 406 becomes faster, and the timing time interval becomes shorter, which can achieve the purpose of adjusting the time interval of switching of the gas source 5.

[0042] like Figure 6 As shown, the driving blade 403 connected to the input shaft rotates under the action of the compressed air output after the pressure reducing device, driving the active shaft 401 to rotate. The driving wheel 404 of the active shaft 401 drives the driven wheel 405 to rotate through the steel belt 407, so that the driven shaft 402 rotates, driving the cam 406 to operate. The rotation of the cam 406 can alternately press the first valve core 21 and the second valve core 31 downward, thereby achieving the purpose of switching the air source 5 of the dual-source pneumatic pump 9 according to the set time interval.

[0043] like Figure 1As shown, the jet device 61 is connected to the air source 5, and a pressure reducing regulator 6 is disposed between the jet device 61 and the air source 5. The working principle of the pressure reducing valve is as follows: Pulling the handwheel outward and rotating it clockwise compresses the pressure regulating spring, pushing the diaphragm assembly downward. This pressure is then released through the valve core, opening the valve core. The inlet pressure is then throttled down by the valve core, resulting in a pressure output. The outlet pressure gas enters the lower chamber of the diaphragm through the feedback tube, generating an upward thrust on the diaphragm. When this thrust is balanced by the pressure regulating spring, the outlet pressure stabilizes at a constant value. Rotating the handwheel counterclockwise continuously reduces the pressure regulating spring force, gradually closing the valve core. The compressed air in the lower chamber of the diaphragm is continuously released through the relief valve. Gas from the air source 5 is then ejected from the jet device 61 onto the drive blade 403, thereby driving the drive blade 403 and the drive shaft 401 to rotate. The pressure reducing regulator 6 reduces the airflow pressure to a fixed, stable pressure, which is used to accurately drive the pneumatic timer, thus making the intake and exhaust switching time of the pump air source control device 1 more precise.

[0044] like Figure 5 As shown, it also includes a driving device 7, which includes a third valve body 71, in which a third valve core 72 that can move back and forth is installed. The third valve body 71 is provided with a fifth port 73, a sixth port 74 and a seventh port 75. When the third valve core 72 is in the fifth position, the fifth port 73 is connected to the sixth port 74. When the third valve core 72 is in the sixth position, the fifth port 73 is connected to the seventh port 75. The first air inlet 25 and the second air inlet 35 are both connected to the seventh port 75. The gas supplied by the air source 5 can be manually switched to the pump air source control device 1 through the driving device 7, wherein the working principle of the driving device 7 is: under the action of external force, the third valve core 72 is pushed to switch between the fifth position and the sixth position, so as to achieve the control effect of the air source 5.

[0045] Example 2

[0046] A dual-air source pneumatic pump control system according to Example 2 of the present application is as follows: Figure 9 As shown, it includes an automatic air source switching device as in any one of the embodiments in Example 1, and also includes a pump air source control solenoid valve 8, the eighth port 84 and the ninth port 85 of the pump air source control solenoid valve 8 are respectively connected to the two air vents 95 of the dual-air source pneumatic pump 9, the tenth port 86 of the pump air source control solenoid valve 8 is connected to the first port 23, the eleventh port 87 of the pump air source control solenoid valve 8 is connected to the third port 33, the third air inlet 88 of the pump air source control solenoid valve 8 is connected to the sixth port 74, and the first air inlet 25 and the second air inlet 35 are both connected to the seventh port 75.

[0047] like Figure 10As shown, the dual-source pneumatic pump 9 includes a cavity 91, which is divided into a first air chamber 92 and a second air chamber 93 by a piston 94. The first air chamber 92 is provided with an air vent 95. By filling gas into the air vent 95 of the first air chamber 92, the piston 94 can be pushed toward the second air chamber 93, and the air in the second air chamber 93 is discharged from the air vent 95 of the second air chamber 93. Similarly, by filling gas into the air vent 95 of the second air chamber 93, the piston 94 can be pushed toward the first air chamber 92, and the air in the first air chamber 92 is discharged from the air vent 95 of the first air chamber 92, thereby converting air energy into mechanical energy, thereby driving the operation of the liquid pump and generating power for pumping liquid.

[0048] like Figure 10-11 As shown, the pump air source control solenoid valve 8 includes a fourth valve body 81, a fourth valve core 82 that can move back and forth is provided in the fourth valve body 81, and electromagnetic driving devices 83 are provided at both ends of the fourth valve body 81. The valve body is provided with an eighth port 84, a ninth port 85, a tenth port 86, an eleventh port 87 and a third air inlet 88. When the fourth valve core 82 is in the seventh position, the eighth port 84 is connected to the tenth port 86, and the ninth port 85 is connected to the third air inlet 88. When the fourth valve core 82 is in the eighth position, the eighth port 84 is connected to the third air inlet 88, and the ninth port 85 is connected to the third air inlet 88. 85 is connected to the eleventh port 87, the electromagnetic drive device 83 includes an electromagnet 831, and the electromagnets 831 are fixed at both ends of the fourth valve body 81, and the iron sheets 832 that cooperate with the electromagnet 831 are fixed at both ends of the fourth valve core 82. By controlling the power on and off of the electromagnets 831 at both ends, the fourth valve body 81 can be switched back and forth between the seventh position and the eighth position, so that the third air inlet 88 is connected to the eighth port 84 or the third air inlet 88 is connected to the ninth port 85, thereby realizing the effect of alternating air intake and exhaust of the two air vents 95 of the dual-source pneumatic pump 9.

[0049] In the above embodiment, if the dual-source pneumatic pump 9 is controlled by the pump air source control solenoid valve 8, the air source 5 is first connected to the third air inlet 88 through the driving device 7, as shown in FIG. Figure 10 As shown, the left electromagnet 831 is energized, the fourth valve core 82 moves to the right, the fourth valve core 82 is in the eighth position, the eighth port 84 is connected to the third air inlet 88, the ninth port 85 is connected to the eleventh port 87, and the air source 5 enters the first air chamber 92 on the left side of the dual-air source pneumatic pump 9 through the third air inlet 88, pushing the middle piston 94 to the right, that is, pushing the piston 94 to the second air chamber 93, and the air in the second air chamber 93 is discharged from the eleventh port 87; Figure 11As shown, the right electromagnet 831 is energized, the fourth valve core 82 moves to the left, the fourth valve core 82 is in the seventh position, the eighth port 84 is connected to the tenth port 86, and the ninth port 85 is connected to the third air inlet 88. The air source 5 enters the first air chamber 92 on the right side of the dual-source pneumatic pump 9 through the third air inlet 88, pushing the middle piston 94 to the left, that is, pushing the piston 94 to the first air chamber 92, and the air in the first air chamber 92 is discharged from the tenth port 86, so that the pump air source can be used to control the solenoid valve 8 to realize the switching of the air source 5 of the dual-source pneumatic pump 9, and the electromagnets 831 on both sides are controlled by the PLC controller to realize the automatic switching of the air source 5 of the dual-source pneumatic pump 9, so that the dual-source pneumatic pump 9 can continue to work automatically.

[0050] In the above embodiment, if the dual-source pneumatic pump 9 is controlled by the pump air source control device 1, the air source 5 is first connected to the first air inlet 25 and the second air inlet 35 through the driving device 7. At the same time, the air source 5 also needs to be ejected from the jet device 61 through the pressure reducing regulator 6 to drive the driving blade 403 to rotate, thereby driving the two cams 406 to alternately press the first valve core 21 and the second valve core 31 at a preset time interval to realize the switching of the air source 5 of the dual-source pneumatic pump 9. The principle is the same as that of the pump air source control solenoid valve 8, which will not be repeated here. The difference is that the pump air source control solenoid valve 8 is directly connected to the dual-source pneumatic pump 9, while the pump air source control device 1 is indirectly connected to the dual-source pneumatic pump 9, that is, the pump air source control device 1 is The dual-source pneumatic pump 9 is connected with the pump air source control solenoid valve 8 as an intermediate bridge, which can also realize the alternating air intake and exhaust of the first air chamber 92 and the second air chamber 93 of the dual-source pneumatic pump 9, so as to realize the left and right reciprocating motion of the piston 94 in the cavity 91. Therefore, when there is a power outage, the purpose of timing switching of the dual-source pneumatic pump 9 to drive the air source 5 can be achieved without the help of power supply, thereby increasing the forced supply capacity of the dual-source pneumatic pump 9 liquid supply system, and it can be manually switched whether the pump air source control device 1 switches the dual-source pneumatic pump 9 to drive the air source 5 or the pump air source control solenoid valve 8 switches the dual-source pneumatic pump 9 to drive the air source 5, so that the control flexibility of the dual-source pneumatic pump 9 is higher, and users can choose the control method according to their needs.

[0051] The above are only preferred specific implementations of this application; however, the scope of protection of this application is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in this application, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of this application shall be covered by the scope of protection of this application.

Claims

1. An automatic gas source switching device, characterized in that: include: A pump air source control device, the pump air source control device comprising a first valve body and a second valve body; A first valve core is installed in the first valve body and can move back and forth. A first return spring is installed on the outer wall of the first valve core. The first valve body is provided with a first opening, a second opening and a first air inlet. When the first valve core is in the first position, the first opening is connected to the second opening. When the first valve core is in the second position, the first opening is connected to the first air inlet. A second valve core is installed in the second valve body and can move back and forth. A second return spring is installed on the outer wall of the second valve core. The second valve body is provided with a third port, a fourth port, and a second air inlet. When the second valve core is in the third position, the third port is connected to the fourth port. When the second valve core is in the fourth position, the third port is connected to the second air inlet. A pneumatic timing device, which includes a driving shaft and a driven shaft, a driving blade is installed at one end of the driving shaft, and an air jet device is provided on one side of the driving blade. A driving wheel is installed on the outer wall of the driving shaft, and a driven wheel is installed on the outer wall of the driven shaft. The driving wheel and the driven wheel are driven by a steel belt. The outer wall of the driven shaft is fixed with two cams with opposite protrusions. The first valve core is in contact with the outer wall of one of the cams under the action of the first return spring, and the second valve core is in contact with the outer wall of the other cam under the action of the second return spring.

2. The automatic gas source switching device according to claim 1, characterized in that: The driving wheel includes a first fixed limiting portion and a first movable limiting portion, the first fixed limiting portion is fixedly sleeved on the outer wall of the driving shaft, the first movable limiting portion is slidably sleeved on the outer wall of the driving shaft, a first externally threaded cylinder is fixed on one side of the first movable limiting portion, the outer wall of the first externally threaded cylinder is threadedly connected to the first internally threaded cylinder, one end of the first externally threaded cylinder is fixed with a first adjusting shaft, the outer wall of the first adjusting shaft is fixedly sleeved with a first transmission wheel and a second transmission wheel, the first transmission wheel is connected to the rotating shaft of the third transmission wheel through a belt drive, and the second transmission wheel is installed with a timing wheel, A fourth transmission wheel is connected via a belt transmission, a fifth transmission wheel is fixedly mounted on the rotating shaft of the fourth transmission wheel, the fifth transmission wheel is connected to the sixth transmission wheel via a belt transmission, the rotating shaft of the sixth transmission wheel is fixedly connected to a second externally threaded cylinder, the outer wall of the second externally threaded cylinder is threadedly connected to a second internally threaded cylinder, the driven wheel includes a second fixed limiting portion and a second movable limiting portion, the second fixed limiting portion is fixedly sleeved on the outer wall of the driven shaft, the second movable limiting portion is slidably sleeved on the outer wall of the driven shaft, and one end of the second externally threaded cylinder is fixedly connected to the second movable limiting portion.

3. The automatic gas source switching device according to claim 2, characterized in that: The jetting device is connected to an air source, and a pressure reducing regulator is provided between the jetting device and the air source.

4. The automatic gas source switching device according to claim 1, characterized in that: It also includes a driving device, which includes a third valve body, in which a third valve core that can move back and forth is installed, and the third valve body is provided with a fifth port, a sixth port and a seventh port. When the third valve core is in the fifth position, the fifth port is connected to the sixth port, and when the third valve core is in the sixth position, the fifth port is connected to the seventh port.

5. A dual-source pneumatic pump control system, characterized in that: It includes the automatic air source switching device as described in any one of claims 1 to 4, and also includes a pump air source control solenoid valve, the eighth port and the ninth port of the pump air source control solenoid valve are respectively connected to the two air vents of the dual-air source pneumatic pump, the tenth port of the pump air source control solenoid valve is connected to the first port, the eleventh port of the pump air source control solenoid valve is connected to the third port, the third air inlet of the pump air source control solenoid valve is connected to the sixth port, and the first air inlet and the second air inlet are both connected to the seventh port.

6. The dual-source pneumatic pump control system according to claim 5, characterized in that: The dual-air-source pneumatic pump comprises a cavity, which is divided into a first air chamber and a second air chamber by a piston, and each of the first air chambers is provided with an air vent.

7. The dual-source pneumatic pump control system according to claim 5, characterized in that: The pump air source control solenoid valve includes a fourth valve body, a fourth valve core that can move back and forth is arranged in the fourth valve body, and electromagnetic driving devices are arranged at both ends of the fourth valve body. The valve body is provided with an eighth port, a ninth port, a tenth port, an eleventh port and a third air inlet. When the fourth valve core is in the seventh position, the eighth port is connected with the tenth port, and the ninth port is connected with the third air inlet. When the fourth valve core is in the eighth position, the eighth port is connected with the third air inlet, and the ninth port is connected with the eleventh port.

8. The dual-air source pneumatic pump control system according to claim 7, characterized in that: The electromagnetic drive device includes an electromagnet. Electromagnets are fixed at both ends of the fourth valve body. Iron sheets that match the electromagnets are fixed at both ends of the fourth valve core.

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