An air source automatic switching device, a double air source pneumatic pump control system and a control method

Abstract

The application relates to the technical field of pneumatic control, solves the problem that the working of a double-gas-source pneumatic pump needs to completely depend on power supply in the prior art, and discloses a gas source automatic switching device, a double-gas-source pneumatic pump control system and a control method, which comprise a pump gas source control device, the pump gas source control device comprises a first valve body and a second valve body, a pneumatic timing device, the pneumatic timing device comprises a driving shaft and a driven shaft, one end of the driving shaft is provided with a driving blade, one side of the driving blade is provided with a jet device, the jet device is driven by airflow or compressed air provided by a gas source, the position of a first valve core and a second valve core is switched through the pneumatic timer, the purpose of timing switching of a double-gas-source pneumatic pump driving gas source is achieved, and the purpose of timing switching of the double-gas-source pneumatic pump driving gas source can be achieved without power supply.

Description

Technical Field

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

[0002] A dual-source pneumatic pump, as the name suggests, is a pneumatic pump that uses two air sources (compressed air or gas) as power sources. It uses the energy of compressed air to pump out liquid, thus achieving liquid transportation. The working principle of a dual-source pneumatic pump is similar to that of a regular pneumatic pump, both using the energy of compressed air or gas to pump out liquid. The difference lies in the fact that a dual-source pneumatic pump uses two air sources, which may be used in different ways (such as series or parallel connection) to achieve higher working efficiency and performance. When compressed air enters the pneumatic pump, it converts air energy into mechanical energy, thereby driving the operation of the liquid pump. The air or gas drives the piston movement inside the liquid pump, thus generating the power to pump the liquid.

[0003] In the existing technology, dual-source pneumatic pumps must be driven by solenoid valves. The operation of solenoid valves depends on power. In the event of a power outage or lack of 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. Summary of the Invention

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

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

[0006] The first valve body is equipped with a reciprocating first valve core, and a first return spring is installed on the outer wall of the first valve core. The first valve body is provided with a first port, a second port and a first air inlet. When the first valve core is in the first position, the first port is connected to the second port. When the first valve core is in the second position, the first port is connected to the first air inlet.

[0007] The second valve body is equipped with a reciprocating second valve core, and 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.

[0008] A pneumatic timing device includes a drive shaft and a driven shaft. A drive blade is mounted on one end of the drive shaft, and an air jet device is provided on one side of the drive blade. A drive wheel is mounted on the outer wall of the drive shaft, and a driven wheel is mounted on the outer wall of the driven shaft. The drive wheel and the driven wheel are driven by a steel belt. Two cams with opposite protrusion directions are fixedly sleeved on the outer wall of the driven shaft. The first valve core is in contact with the outer wall of one of the cams under the action of a first return spring, and the second valve core is in contact with the outer wall of the other cam under the action of a second return spring. The cams are used to drive the first valve core to switch between a first position and a second position, and also to drive the second valve core to be determined between a third position and a fourth position. 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 drive wheel includes a first fixed limiting part and a first movable limiting part. The first fixed limiting part is fixedly sleeved on the outer wall of the drive shaft, and the first movable limiting part is slidably sleeved on the outer wall of the drive shaft. A first external threaded cylinder is fixed to one side of the first movable limiting part, and a first internal threaded cylinder is threadedly connected to the outer wall of the first external threaded cylinder. A first adjusting shaft is fixed to one end of the first external threaded cylinder. A first transmission wheel and a second transmission wheel are fixedly sleeved on the outer wall of the first adjusting shaft. A timing wheel is mounted on the shaft of a third transmission wheel connected to the first transmission wheel via a belt drive. A fourth transmission wheel is connected to the second transmission wheel via a belt drive. A fifth transmission wheel is fixedly mounted on the shaft of the fourth transmission wheel. A sixth transmission wheel is connected to the shaft of the sixth transmission wheel via a belt drive. A second external threaded cylinder is fixedly connected to the shaft of the sixth transmission wheel. The outer wall of the second external threaded cylinder is threadedly connected to the second internal threaded cylinder. The driven wheel includes a second fixed limiting part and a second movable limiting part. The second fixed limiting part is fixedly sleeved on the outer wall of the driven shaft, and the second movable limiting part is slidably sleeved on the outer wall of the driven shaft. One end of the second external threaded cylinder is fixedly connected to the second movable limiting part. The distance between the ends of the driving wheel and the driven wheel can be adjusted by the timer wheel, thereby changing the rotation radius of the two ends of the steel belt. This allows for adjustment of the transmission ratio between the driving shaft and the driven shaft, thereby achieving the purpose of adjusting the cam rotation speed. The frequency at which the cam presses the first valve core and the second valve core within a certain time can be adjusted. That is, by rotating the timer wheel, the time interval between the position switching of the first valve core and the second valve core can be adjusted. The time interval between the position switching of the first valve core and the second valve core is 0.1-3 seconds.

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

[0011] In some possible implementations, a drive device is also included, which includes a third valve body with a reciprocating third valve core installed inside. 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. 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. The drive device can manually switch the gas supplied by the gas source to the pump air source control device.

[0012] In a second aspect, a dual-source pneumatic pump control system is provided, including an automatic air source switching device as described in any implementation of the first aspect, and a pump air source control solenoid valve. The eighth and ninth ports of the pump air source control solenoid valve are respectively connected to two air inlets of the dual-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. The first air inlet and the second air inlet are both connected to the seventh port.

[0013] In some possible implementations, the dual-air-source pneumatic pump includes a cavity, which is divided into a first air chamber and a second air chamber by a piston. Each of the first air chambers is provided with an air vent. By filling the air vent of the first air chamber, the piston can be pushed towards 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 the air vent of the second air chamber, the piston can be pushed towards 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 the power to pump liquid.

[0014] In some possible implementations, the pump air source control solenoid valve includes a fourth valve body, within which a reciprocating fourth valve core is disposed. Electromagnetic drive devices are disposed at both ends of the fourth valve body. The valve body has 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 drive device includes an electromagnet, with electromagnets fixed at both ends of the fourth valve body and iron plates cooperating with the electromagnets fixed at both ends of the fourth valve core. By controlling the energization and de-energization of the electromagnets at both ends, the fourth valve body can be switched back and forth between the seventh and eighth positions, thus connecting the third air inlet to the eighth port or the third air inlet to the ninth port, thereby achieving the effect of alternating air intake and exhaust at the two air ports of the dual-air source pneumatic pump.

[0015] Thirdly, a dual-source pneumatic pump control method is provided, including an automatic air source switching system as described in any implementation of the second aspect. If the pump air source control solenoid valve is energized, the control method includes: realizing the air source switching control of the dual-source pneumatic pump through the pump air source control solenoid valve or the pump air source control device.

[0016] Fourthly, a dual-source pneumatic pump control method is provided, including an automatic air source switching system as described in any implementation of the second aspect. If the pump air source control solenoid valve is not energized, the control method includes: realizing the air source switching control of the dual-source pneumatic pump through a pump air source control device.

[0017] This application has the following beneficial effects: It uses an airflow or compressed air source to drive a pneumatic timer, which then drives the first and second valve cores to switch positions, achieving the purpose of timed switching of the dual-source pneumatic pump's driving air source. This allows for timed switching of the dual-source pneumatic pump's driving air source even without a power supply, thereby increasing the forced supply capacity of the dual-source pneumatic pump liquid supply system. Furthermore, it allows manual switching between using a pump-source control device to switch the dual-source pneumatic pump's driving air source and using a pump-source control solenoid valve to switch the dual-source pneumatic pump's driving air source, making the control of the dual-source pneumatic pump more flexible, allowing users to choose the control method according to their needs. Attached Figure Description

[0018] The accompanying drawings, which form 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 undue limitation of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the automatic gas source switching device according to Embodiment 1 of this application;

[0021] Figure 2 This is a schematic diagram of the first valve body in the first position of the automatic gas source switching device in Embodiment 1 of this application;

[0022] Figure 3 This is a schematic diagram of the first valve body in the second position of the automatic gas source switching device in Embodiment 1 of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the second valve body in the automatic gas source switching device of Embodiment 1 of this application;

[0024] Figure 5 This is a schematic diagram of the drive device in the automatic gas source switching device of Embodiment 1 of this application;

[0025] Figure 6 This is a schematic diagram of the pneumatic timing device in the automatic gas source switching device of Embodiment 1 of this application, with a timing interval of 3 seconds.

[0026] Figure 7 This is a schematic diagram of the pneumatic timing device in the automatic gas source switching device of Embodiment 1 of this application, with a timing interval of 0.1 seconds.

[0027] Figure 8 This is a schematic diagram of the cam structure in the automatic air source switching device of Embodiment 1 of this application;

[0028] Figure 9 This is a schematic diagram of the dual-air-source pneumatic pump control system of Embodiment 2 of this application;

[0029] 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 Embodiment 2 of this application. Figure 1 ;

[0030] 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 Embodiment 2 of this application. Figure 2 .

[0031] Figure label:

[0032] 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. Drive shaft; 402. Driven shaft; 403. Drive blade; 404. Drive wheel; 4041. First fixed limit part; 4042. First movable limit part; 405. Driven wheel; 4051. Second fixed limit part; 4052. Second movable limit part; 406. Cam; 407. Steel belt; 408. First external threaded cylinder; 409. First internal threaded cylinder; 410. First adjusting shaft; 411. First transmission wheel; 412. Second transmission wheel; 413. 414. Third transmission wheel; 415. Fourth transmission wheel; 416. Belt; 417. Timing wheel; 418. Fifth transmission wheel; 419. Sixth transmission wheel; 420. Second external threaded cylinder; 421. Second internal threaded cylinder; 5. Air source; 6. Pressure reducing regulator; 61. Jet 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 air source pneumatic pump; 91. Cavity; 92. First air chamber; 93. Second air chamber; 94. Piston; 95. Air vent. Detailed Implementation

[0033] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] Example 1

[0037] The automatic gas source switching device involved in Embodiment 1 of this application, such as Figure 1 As shown, it includes: a pump air source control device 1, which includes a first valve body 2 and a second valve body 3. The pump air source control device 1 is connected to the air source 5 of the dual air source pneumatic pump 9 and the dual air source pneumatic pump 9, and directly controls the switching operation of the air source 5 of the dual air source pneumatic pump 9.

[0038] like Figures 2-3 As shown in the figure, the arrow direction represents the gas flow direction. A first valve core 21 that can reciprocate is installed inside 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 port 23, a second port 24 and a first air inlet 25. When the first valve core 21 is in the first position, the first port 23 is connected to the second port 24. When the first valve core 21 is in the second position, the first port 23 is connected to the first air inlet 25.

[0039] like Figure 6 As shown, a reciprocating second valve core 31 is installed inside the second valve body 3. 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.

[0040] like Figures 7-8As shown, the pneumatic timing device 4 includes a drive shaft 401 and a driven shaft 402. A drive blade 403 is installed at one end of the drive shaft 401, and an air jet device 61 is provided on one side of the drive blade 403. A drive wheel 404 is installed on the outer wall of the drive shaft 401, and a driven wheel 405 is installed on the outer wall of the driven shaft 402. The drive wheel 404 and the driven wheel 405 are driven by a steel belt 407. Two cams 406 with opposite protrusion directions are fixedly sleeved on the outer wall of the driven shaft 402. 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. The cams 406 are 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. When the first valve core 21 is in the first position, the second valve core 31 is in the fourth position.

[0041] like Figures 7-8As shown, the drive wheel 404 includes a first fixed limiting part 4041 and a first movable limiting part 4042. The first fixed limiting part 4041 is fixedly sleeved on the outer wall of the drive shaft 401, and the first movable limiting part 4042 is slidably sleeved on the outer wall of the drive shaft 401. A first external threaded cylinder 408 is fixed to one side of the first movable limiting part 4042. A first internal threaded cylinder 409 is threadedly connected to the outer wall of the first external threaded cylinder 408. A first adjusting shaft 410 is fixed to one end of the first external threaded cylinder 408. A first transmission wheel 411 and a second transmission wheel 412 are fixedly sleeved on the outer wall of the first adjusting shaft 410. The first transmission wheel 411 transmits power through a belt 415. A timing wheel 416 is mounted on the shaft of the third transmission wheel 413. A fourth transmission wheel 414 is connected to the second transmission wheel 412 via a belt 415. A fifth transmission wheel 417 is fixedly mounted on the shaft of the fourth transmission wheel 414. A sixth transmission wheel 418 is connected to the fifth transmission wheel 417 via a belt 415. A second external threaded cylinder 419 is fixedly connected to the shaft of the sixth transmission wheel 418. A second internal threaded cylinder 420 is threadedly connected to the outer wall of the second external threaded cylinder 419. The driven wheel 405 includes a second fixed limiting part 4051 and a second movable limiting part 4052. The second fixed limiting part 4051 is fixedly sleeved on... The second movable limiting part 4052 is slidably sleeved on the outer wall of the driven shaft 402. One end of the second external threaded cylinder 419 is fixedly connected to the second movable limiting part 4052. The distance between the ends of the driving wheel 404 and the driven wheel 405 can be adjusted by the timing wheel 416, thereby changing the rotation radius of both ends of the steel belt 407. This allows for adjustment of the transmission ratio between the driving shaft 401 and the driven shaft 402, thus achieving the purpose of adjusting the rotation speed of the cam 406. The frequency at which the cam 406 presses the first valve core 21 and the second valve core 31 within a certain time period can be adjusted by rotating the timing wheel 416. The device can adjust the time interval between the position switching of the first valve core 21 and the second valve core 31. The time interval between 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 switches according to the set time after operation. For example, if the time interval is set to 0.5 seconds, then from 0 to 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; from 0.5 seconds to 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 operation of the dual air source pneumatic pump 9.

[0042] In the above embodiments, the inner sides of both the first movable limiting part 4042 and the second movable limiting part 4052 are configured as frustum-shaped or conical structures, i.e., enlarged or reduced. When the distance between the first movable limiting part 4042 and the first fixed limiting part 4041 decreases, the steel strip 407 can be squeezed outward to increase the rotation radius of the steel strip 407 at the drive shaft 401. At the same time, the distance between the second movable limiting part 4052 and the second fixed limiting part 4051 increases at the same speed, which can cause the steel strip 407 to contract inward to reduce the rotation radius of the steel strip at the driven shaft 402, thereby... This allows the driven shaft 402 to rotate more times for every one revolution of the drive shaft 401. Similarly, when the distance between the first movable limit part 4042 and the first fixed limit part 4041 increases, the steel strip 407 can contract inward to reduce the rotation radius of the steel strip 407 at the drive 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 strip 407 outward to increase the rotation radius of the steel strip at the driven shaft 402, thereby allowing the driven shaft 402 to rotate fewer times for every one revolution of the drive shaft 401.

[0043] When the timing wheel 416 is rotated counterclockwise, the first internal threaded cylinder 409 remains stationary. The timing wheel 416 drives the first external threaded cylinder 408 to rotate via the first adjusting shaft 410. Since the first internal threaded cylinder 409 remains stationary, the first external threaded cylinder 408 is pushed to the left, thereby pushing the first movable limiting part 4042 to move to the left. This causes the groove spacing of the driving wheel 404 to narrow and the turning radius of the steel belt 407 to increase. Figure 8 As shown, similarly, the second internal threaded cylinder 420 remains fixed, the second external threaded cylinder 419 moves to the left, the second movable limiting part 4052 of the driven wheel 405 moves to the left, the groove of the driven wheel 405 widens, the turning radius of the steel belt 407 decreases, the transmission ratio between the drive shaft 401 and the driven shaft 402 changes, the speed of the driven wheel 405 changes, the speed of the cam 406 increases, thereby shortening the timing interval, which can achieve the purpose of adjusting the time interval of the air source 5 switching.

[0044] like Figure 6 As shown, the drive blade 403 connected to the input shaft rotates under the action of compressed air output after passing through the pressure reducing device, driving the drive shaft 401 to rotate. The drive wheel 404 of the drive shaft 401 drives the driven wheel 405 to rotate via the steel belt 407, causing the driven shaft 402 to rotate, which in turn drives 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 air source pneumatic pump 9 according to the set time interval.

[0045] like Figure 1As shown, the jet device 61 is connected to the air source 5, and a pressure-reducing regulator 6 is installed 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 pushes the diaphragm assembly downward, opening the valve core. The inlet pressure is then reduced by the valve core, resulting in pressure output. The outlet pressure gas enters the lower cavity of the diaphragm through the feedback pipe, generating an upward thrust on the diaphragm. When this thrust balances with the pressure regulating spring, the outlet pressure stabilizes at a certain value. Rotating the handwheel counterclockwise continuously reduces the pressure regulating spring force, gradually closing the valve core. The compressed air in the lower cavity of the diaphragm is continuously released through the overflow valve. The gas supplied by the air source 5 is injected from the jet device 61 onto the drive blade 403, thereby driving the drive blade 403 and the drive shaft 401 to rotate. By setting the pressure-reducing regulator 6, the airflow pressure can be reduced to obtain a fixed and stable pressure, which is used to drive the pneumatic timer to accurately keep time, making the inlet and outlet switching time of the pump air source control device 1 more precise.

[0046] like Figure 5 As shown, it also includes a drive device 7, which includes a third valve body 71. A reciprocating third valve core 72 is installed inside the third valve body 71. 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 drive device 7 can manually switch the gas supplied by the gas source 5 to the pump air source control device 1. The working principle of the drive 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 to achieve the control function of the gas source 5.

[0047] Example 2

[0048] The dual-air-source pneumatic pump control system described in Embodiment 2 of this application, such as Figure 9 As shown, the device includes an automatic gas source switching device as described in any embodiment of Example 1, and also includes a pump gas source control solenoid valve 8. The eighth port 84 and the ninth port 85 of the pump gas source control solenoid valve 8 are respectively connected to the two air inlets 95 of the dual gas source pneumatic pump 9. The tenth port 86 of the pump gas source control solenoid valve 8 is connected to the first port 23. The eleventh port 87 of the pump gas source control solenoid valve 8 is connected to the third port 33. The third air inlet 88 of the pump gas source control solenoid valve 8 is connected to the sixth port 74. The first air inlet 25 and the second air inlet 35 are both connected to the seventh port 75.

[0049] 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. Each first air chamber 92 is provided with an air vent 95. By filling the air vent 95 of the first air chamber 92 with gas, the piston 94 can be pushed towards the second air chamber 93, and the air in the second air chamber 93 is discharged from the air vent 95. Similarly, by filling the air vent 95 of the second air chamber 93 with gas, the piston 94 can be pushed towards the first air chamber 92, and the air in the first air chamber 92 is discharged from the air vent 95, thereby converting air energy into mechanical energy, thereby driving the operation of the liquid pump and generating the power to pump liquid.

[0050] like Figure 10-11 As shown, the pump air source control solenoid valve 8 includes a fourth valve body 81, within which a reciprocating fourth valve core 82 is disposed. Electromagnetic drive devices 83 are disposed 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. Port 85 is connected to the eleventh port 87. The electromagnetic drive device 83 includes an electromagnet 831. Electromagnets 831 are fixed at both ends of the fourth valve body 81. Iron pieces 832 that cooperate with electromagnets 831 are fixed at both ends of the fourth valve core 82. By controlling the energization and de-energization 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 ports 95 of the dual air source pneumatic pump 9.

[0051] 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 drive device 7, such as... Figure 10 As shown, when the left electromagnet 831 is energized, the fourth valve core 82 moves to the right, and 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 eleventh port 87. 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 towards the second air chamber 93. The air in the second air chamber 93 is discharged from the eleventh port 87. Figure 11As shown, when the right electromagnet 831 is energized, the fourth valve core 82 moves to the left and 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 air source pneumatic pump 9 through the third air inlet 88, pushing the middle piston 94 to the left, that is, pushing the piston 94 towards the first air chamber 92. The air in the first air chamber 92 is discharged from the tenth port 86. Thus, the air source 5 of the dual air source pneumatic pump 9 can be switched by controlling the solenoid valve 8 with the pump air source. With the help of the PLC controller to control the electromagnets 831 on both sides, the automatic switching of the air source 5 of the dual air source pneumatic pump 9 can be realized, so that the dual air source pneumatic pump 9 can work continuously and automatically.

[0052] In the above embodiment, if the air source control device 1 is used to control the dual-air source pneumatic pump 9, firstly, the air source 5 is connected to the first air inlet 25 and the second air inlet 35 through the drive device 7. Simultaneously, the air source 5 also needs to be ejected from the jet device 61 through the pressure reducing regulator 6 to drive the drive 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 preset time intervals to achieve the switching of the air source 5 of the dual-air source pneumatic pump 9. Its principle is the same as that of the air source control solenoid valve 8, and will not be elaborated here. The difference is that the air source control solenoid valve 8 is directly connected to the dual-air source pneumatic pump 9, while the air source control device 1 is indirectly connected to the dual-air source pneumatic pump 9. That is, the air source control device 1 is... Connected to the dual-source pneumatic pump 9 via the pump air source control solenoid valve 8 as an intermediate bridge, it can also realize the alternating 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 reciprocating motion of the piston 94 in the cavity 91. Thus, even in the event of a power outage, without the need for a power supply, it can still achieve the purpose of timed switching of the dual-source pneumatic pump 9 driving the air source 5, thereby increasing the forced supply capacity of the liquid supply system of the dual-source pneumatic pump 9. Furthermore, it can be manually switched between the pump air source control device 1 and the pump air source control solenoid valve 8, making the control of the dual-source pneumatic pump 9 more flexible, and users can choose the control method according to their needs.

[0053] Example 3

[0054] The dual-source pneumatic pump control method disclosed in Embodiment 3 of this application includes an automatic air source switching system as described in any embodiment of Embodiment 2. If the pump air source control solenoid valve is energized, the control method includes: realizing the air source switching control of the dual-source pneumatic pump through the pump air source control solenoid valve or the pump air source control device.

[0055] It should be noted that other specific implementations of the automatic gas source switching method in this embodiment can be found in the specific implementations of the automatic gas source switching system described above. To avoid redundancy, they will not be repeated here.

[0056] Example 4

[0057] The dual-source pneumatic pump control method disclosed in Embodiment 4 of this application includes an automatic gas source switching system as described in any embodiment of Embodiment 2. If the pump gas source control solenoid valve is not energized, the control method includes: realizing the gas source switching control of the dual-source pneumatic pump through a pump gas source control device.

[0058] It should be noted that other specific implementations of the automatic gas source switching method in this embodiment can be found in the specific implementations of the automatic gas source switching system described above. To avoid redundancy, they will not be repeated here.

[0059] The above are merely preferred embodiments of this application; however, the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within 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; The first valve body is equipped with a reciprocating first valve core, and a first return spring is installed on the outer wall of the first valve core. The first valve body is provided with a first port, a second port and a first air inlet. When the first valve core is in the first position, the first port is connected to the second port. When the first valve core is in the second position, the first port is connected to the first air inlet. The second valve body is equipped with a reciprocating second valve core, and 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 includes a drive shaft and a driven shaft. A drive blade is mounted on one end of the drive shaft, and an air jet device is provided on one side of the drive blade. A drive wheel is mounted on the outer wall of the drive shaft, and a driven wheel is mounted on the outer wall of the driven shaft. The drive wheel and the driven wheel are driven by a steel belt. Two cams with opposite protrusion directions are fixedly sleeved on the outer wall of the driven shaft. The first valve core is in contact with the outer wall of one of the cams under the action of a first return spring, and the second valve core is in contact with the outer wall of the other cam under the action of a second return spring. The jetting device is connected to an air source, and a pressure-reducing regulator is installed between the jetting device and the air source. The working principle of the pressure-reducing regulator is as follows: when the handwheel is pulled outward and rotated clockwise, the pressure regulating spring is compressed, which pushes the diaphragm assembly downward. Through the valve core, the valve core is opened, and the pressure at the inlet is reduced by the valve core, resulting in pressure output. The outlet pressure gas enters the lower cavity of the diaphragm through the feedback tube, generating an upward thrust on the diaphragm. When this thrust is balanced with the pressure regulating spring, the outlet pressure stabilizes at a certain value.

2. The automatic gas source switching device according to claim 1, characterized in that, The drive wheel includes a first fixed limiting part and a first movable limiting part. The first fixed limiting part is fixedly sleeved on the outer wall of the drive shaft, and the first movable limiting part is slidably sleeved on the outer wall of the drive shaft. A first external threaded cylinder is fixed to one side of the first movable limiting part, and a first internal threaded cylinder is threadedly connected to the outer wall of the first external threaded cylinder. A first adjusting shaft is fixed to one end of the first external threaded cylinder. A first transmission wheel and a second transmission wheel are fixedly sleeved on the outer wall of the first adjusting shaft. A timing wheel is mounted on the shaft of the first transmission wheel, which is connected to the third transmission wheel via a belt drive. The second transmission wheel... A fourth drive wheel is connected via belt drive. A fifth drive wheel is fixedly mounted on the shaft of the fourth drive wheel. A sixth drive wheel is connected to the fifth drive wheel via belt drive. A second external threaded cylinder is fixedly connected to the shaft of the sixth drive wheel. A second internal threaded cylinder is threadedly connected to the outer wall of the second external threaded cylinder. The driven wheel includes a second fixed limiting part and a second movable limiting part. The second fixed limiting part is fixedly sleeved on the outer wall of the driven shaft. The second movable limiting part is slidably sleeved on the outer wall of the driven shaft. One end of the second external threaded cylinder is fixedly connected to the second movable limiting part.

3. The automatic gas source switching device according to claim 1, characterized in that, It also includes a drive device, which includes a third valve body. A reciprocating third valve core is installed inside the third valve body. 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. When the third valve core is in the sixth position, the fifth port is connected to the seventh port.

4. A dual-air-source pneumatic pump control system, characterized in that, The device includes an automatic gas source switching device as described in any one of claims 1-3, and further includes a pump gas source control solenoid valve. The eighth and ninth ports of the pump gas source control solenoid valve are respectively connected to the two air inlets of the dual-gas-source pneumatic pump. The tenth port of the pump gas source control solenoid valve is connected to the first port. The eleventh port of the pump gas source control solenoid valve is connected to the third port. The third air inlet of the pump gas source control solenoid valve is connected to the sixth port. The first air inlet and the second air inlet are both connected to the seventh port.

5. The dual-air-source pneumatic pump control system according to claim 4, characterized in that, The dual-source pneumatic pump includes a cavity, which is divided into a first air chamber and a second air chamber by a piston. Each of the first air chambers is provided with an air vent.

6. The dual-air-source pneumatic pump control system according to claim 4, characterized in that, The pump air source control solenoid valve includes a fourth valve body, in which a reciprocating fourth valve core is disposed. Electromagnetic drive devices are disposed 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.

7. The dual-air-source pneumatic pump control system according to claim 6, characterized in that, The electromagnetic drive device includes an electromagnet, and electromagnets are fixed at both ends of the fourth valve body. Iron plates that cooperate with the electromagnets are fixed at both ends of the fourth valve core.

8. A method for controlling a dual-air-source pneumatic pump, characterized in that, The control method for the dual-source pneumatic pump, as described in any one of claims 4-7, includes, if the pump air source control solenoid valve is energized, the control method includes: realizing the air source switching control of the dual-source pneumatic pump through the pump air source control solenoid valve or the pump air source control device.

9. A method for controlling a dual-air-source pneumatic pump, characterized in that, The control method for the dual-source pneumatic pump, as described in any one of claims 4-7, includes the following: if the pump air source control solenoid valve is not energized, the control method includes: realizing the air source switching control of the dual-source pneumatic pump through the pump air source control device.

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