An inflating device

Abstract

The present invention provides an inflation device, which comprises: a first solenoid valve, a first pressure sensor, a second solenoid valve, a pilot regulating valve and a controller; the first control signal sent by the controller is used to open or close to control the inflow of an external air source into the first air path, the first pressure value of the first air path is collected by the first pressure sensor and sent to the controller, and the controller generates a second control signal after receiving the first pressure value; the controller sends an opening signal to the first solenoid valve to allow the gas of the external air source to flow into the first air path, so that the pressure in the first air path increases. The feedback end of the pilot regulating valve is connected to the calibration interface of the first pressure sensor, and the pressure output by the output end of the pilot regulating valve will be consistent with the gas pressure received by the feedback end of the pilot regulating valve, thereby controlling the gas pressure output to the external device, automatically regulating the pressure output to the external device, replacing the servo system in the prior art, reducing the volume of the pressure regulating device and saving costs.

Description

Technical Field

[0001] The present invention relates to the field of control technologies, and particularly to an inflation device. Background Art

[0002] In the prior art, a corresponding inflation device is required to inflate a gas at a predetermined pressure into a corresponding device. Usually, two methods are adopted to adjust the output gas to the predetermined pressure. The first method is to manually adjust the output end of a pressure reducer to adjust the output gas pressure, and the second method is to use a servo system to control the adjusting rod of the pressure reducer to adjust the output gas pressure at the output end of the pressure reducer.

[0003] However, the prior art has the following deficiencies: manual adjustment requires a large amount of human resources; the adopted servo system is bulky and expensive. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides an inflation device, which solves the problems of manual adjustment requiring a large amount of human resources and the servo system being bulky and expensive in the prior art.

[0005] The present invention provides an inflation device, which includes: a first solenoid valve, a first pressure sensor, a second solenoid valve, a pilot-operated regulating valve, and a controller; the input end of the first solenoid valve is connected to an external gas source through a first gas path, and the control end of the first solenoid valve is electrically connected to the controller, and is used to open or close according to a first control signal sent by the controller to enable the gas output by the external gas source to flow into the first gas path; the input end of the first pressure sensor is connected to the output end of the first solenoid valve through the first gas path, and the feedback end of the first pressure sensor is connected to the controller, and is used to send the first pressure value of the first gas path collected to the controller, so that the controller generates a second control signal according to the first pressure value; the input end of the second solenoid valve is connected to the output end of the first pressure sensor through the first gas path, the output end of the second solenoid valve is connected to the outside through the first gas path, and the control end of the second solenoid valve is connected to the controller, and is used to open or close according to the second control signal to adjust the gas pressure in the first gas path; the input end of the pilot-operated regulating valve is connected to the external gas source through a second gas path, and the feedback end of the pilot-operated regulating valve is connected to the calibration interface of the first pressure sensor, and is used to make the gas pressure output at the output end consistent with the first pressure value according to the first pressure value.

[0006] Optionally, the device further includes: a third solenoid valve; an input end of the third solenoid valve is connected to an input end of the pilot regulating valve, an output end of the third solenoid valve is connected to an external device, and a control end of the third solenoid valve is connected to the controller, and is configured to be opened or closed according to a third control signal sent by the controller, so that the gas output from the output end of the pilot regulating valve inflates the external device.

[0007] Optionally, the device further includes: a second pressure sensor; an input end of the second pressure sensor is connected to an output end of the third solenoid valve, an output end of the second pressure sensor is connected to the external inflation device, and a control end of the second pressure sensor is connected to the controller, and is configured to collect a second pressure value of the gas input into the external inflation device, so that the controller sends a third control signal to control the third solenoid valve to be opened or closed.

[0008] Optionally, the device further includes: a first pressure gauge; an input end of the first pressure gauge is connected to an output end of the pilot regulating valve, and an output end of the first pressure gauge is connected to an input end of the third solenoid valve, and is configured to display the gas pressure output from the output end of the pilot regulating valve collected.

[0009] Optionally, the device further includes: a safety valve; the safety valve is connected to a feedback end of the first pressure gauge, and is configured to be opened when the pressure value output by the first pressure gauge exceeds a threshold value of the safety valve.

[0010] Optionally, the device further includes: a first three-way valve; an input end of the first three-way valve is connected to an output end of the second pressure sensor, a first output end of the first three-way valve is connected to the outside, and a second output end of the first three-way valve is connected to an external device.

[0011] Optionally, the device further includes: a second three-way valve; an input end of the second three-way valve is connected to an external gas source, a first output end of the second three-way valve is connected to the outside, and a second output end of the second three-way valve is respectively connected to an output end of the first solenoid valve and an input end of the pilot regulating valve.

[0012] Optionally, the device further includes: an orifice plate; an input end of the orifice plate is connected to an output end of the first solenoid valve, and an output end of the orifice plate is connected to an input end of the first pressure sensor, and is configured to buffer the gas pressure flowing into the first gas path.

[0013] Optionally, the inflation device includes an inflation control circuit, and the inflation control circuit includes: a UPS power supply, an inflation switch, a first contact switch, and a first relay; a first end of the inflation switch is connected to a first end of the first contact switch, and a second end of the inflation switch is connected to the positive pole of the UPS power supply; both ends of the first switch of the first relay are connected in parallel with the inflation switch; both ends of the coil of the first relay are respectively connected to a second end of the first contact switch and grounded; both ends of the first pressure sensor are respectively connected to the positive pole of the UPS power supply and the controller; both ends of the second pressure sensor are respectively connected to the positive pole of the UPS power supply and the controller; both ends of the second switch of the first relay are respectively connected to the positive pole of the UPS power supply and a first control end of the third solenoid valve; a second control end of the third solenoid valve is grounded.

[0014] Optionally, the inflation control circuit further includes: a third relay, a fourth relay, a second contact switch, and a third contact switch; both ends of the second contact switch are respectively connected to the positive pole of the UPS power supply and a first end of the coil of the third relay; a second end of the coil of the third relay is grounded; a first end of the first switch of the third relay is connected to the positive pole of the UPS power supply, and a second end of the second switch of the third relay is connected to a first control end of the first solenoid valve; a second control end of the first solenoid valve is grounded; both ends of the third contact switch are respectively connected to the positive pole of the UPS power supply and a first end of the coil of the fourth relay; a second end of the coil of the fourth relay is grounded; both ends of the first switch of the fourth relay are respectively connected to the positive pole of the UPS power supply and a first control end of the second solenoid valve, and a second end of the second solenoid valve is grounded.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The first control signal sent by the controller is turned on or off to control the inflow of the external air source into the first air path. The first pressure value of the first air path is collected by the first pressure sensor and sent to the controller, and the controller generates a second control signal after receiving the first pressure value; the controller sends an opening signal to the first solenoid valve to make the gas of the external air source flow into the first air path, so that the pressure in the first air path rises. The feedback end of the pilot control valve is connected to the calibration interface of the first pressure sensor, and the pressure output by the output end of the pilot control valve will be consistent with the gas pressure received by the feedback end of the pilot control valve, so as to control the gas pressure output to the external device, automatically adjust the pressure output to the external device, without manual adjustment, replaces the servo system in the prior art, reduces the volume of the pressure regulating device, and saves costs. Description of the Drawings

[0017] Figure 1Structural diagram of an inflation device provided by an embodiment of the present invention;

[0018] Figure 2 Structural diagram of another inflation device provided by an embodiment of the present invention;

[0019] Figure 3 Structural diagram of yet another inflation device provided by an embodiment of the present invention;

[0020] Figure 4 Circuit diagram of an inflation control circuit provided by an embodiment of the present invention;

[0021] Figure 5 Circuit diagram of another inflation control circuit provided by an embodiment of the present invention. Detailed implementation manners

[0022] The technical solutions in the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 Structural diagram of an inflation device provided by an embodiment of the present invention, as Figure 1 shown, the device includes: a first solenoid valve DF1, a first pressure sensor YC1, a second solenoid valve DF2, a pilot regulating valve XDJ1, and a controller U1;

[0024] The input end of the first solenoid valve DF1 is connected to an external air source through a first air path, and the control end of the first solenoid valve DF1 is electrically connected to the controller U1, and is used to open or close according to a first control signal issued by the controller U1 to allow the gas output from the external air source to flow into the first air path;

[0025] The input end of the first pressure sensor YC1 is connected to the output end of the first solenoid valve DF1 through a first air path, and the feedback end of the first pressure sensor YC1 is connected to the controller U1, and is used to send the first pressure value of the first air path collected to the controller U1, so that the controller U1 generates a second control signal according to the first pressure value;

[0026] The input end of the second solenoid valve DF2 is connected to the output end of the first pressure sensor YC1 through a first air path, the output end of the second solenoid valve DF2 is connected to the outside through a first air path, and the control end of the second solenoid valve DF2 is connected to the controller U1, and is used to open or close to adjust the gas pressure in the first air path according to the second control signal;

[0027] The input end of the pilot control valve XDJ1 is connected to an external air source through a second air path, and the feedback end of the pilot control valve XDJ1 is connected to the calibration interface of the first pressure sensor YC1, so as to make the gas pressure output from the output end consistent with the first pressure value according to the first pressure value.

[0028] In this embodiment, the first control signal sent by the controller U1 is used to open or close to control the external air source to flow into the first air path. The first pressure sensor YC1 collects the first pressure value of the first air path and sends it to the controller U1. The controller U1 generates a second control signal after receiving the first pressure value. Specifically, when the first pressure value meets the preset value of the controller U1, the controller U1 sends a second control signal to the second solenoid valve DF2 to open or close the second solenoid valve DF2 to adjust the gas pressure in the first air path. For example, when it is necessary to reduce the output pressure of the gas, that is, when the first pressure value is higher than the preset value of the controller U1, the controller U1 sends a second control signal to open the second solenoid valve DF2 in the first air path, and the gas in the second air path is discharged to the outside for pressure relief; when it is necessary to increase the output pressure of the gas, that is, when the first pressure value is lower than the preset value of the controller U1, the controller U1 sends a second control signal to close the second solenoid valve DF2 in the first air path, and the controller U1 sends an opening signal to the first solenoid valve DF1 to make the gas of the external air source flow into the first air path to increase the pressure in the first air path. The feedback end of the pilot control valve XDJ1 is connected to the calibration interface of the first pressure sensor YC1, and the pressure output from the output end of the pilot control valve XDJ1 will be consistent with the gas pressure received at the feedback end of the pilot control valve XDJ1, so as to control the gas pressure output to the external device, automatically adjust the pressure output to the external device, without manual adjustment, replacing the servo system in the prior art, reducing the volume of the pressure regulating device, and saving costs. It should be noted that the evacuation shown in the figure means that the first air path is connected to the outside.

[0029] In another embodiment of the present invention, the device further includes: a third solenoid valve; the input end of the third solenoid valve is connected to the input end of the pilot control valve XDJ1, the output end of the third solenoid valve is connected to an external device, and the control end of the third solenoid valve is connected to the controller U1, and is used to open or close according to the third control signal sent by the controller U1, so that the gas output from the output end of the pilot control valve XDJ1 inflates the external device.

[0030] In this embodiment, the controller U1 controls the opening or closing of the third solenoid valve by sending a third control signal to the third solenoid valve, so as to control the inflation of the external device with the preset pressure gas output from the output end of the pilot control valve XDJ1. This embodiment is not shown in the figure.

[0031] Figure 2Structural diagram of another inflation device provided by an embodiment of the present invention, as shown in Figure 2 shown, the device further includes: a second pressure sensor YC2; an input end of the second pressure sensor YC2 is connected to an output end of the third solenoid valve, an output end of the second pressure sensor YC2 is connected to the external inflation device, and a control end of the second pressure sensor YC2 is connected to the controller U1, and is configured to collect a second pressure value of the gas input into the external inflation device, so that the controller U1 issues a third control signal to control the third solenoid valve to open or close.

[0032] In this embodiment, the second pressure sensor YC2 collects the pressure output from the output port of the third solenoid valve, that is, the second pressure value. The controller U1 determines whether the second pressure value is within a preset range. When the second pressure value is not within the preset range or it is necessary to stop inflating the external device, a third control signal is sent to the third solenoid valve to control the third solenoid valve to close and stop inflating the external device; when the second pressure value is within the preset range, a third control signal is sent to the third solenoid valve to control the third solenoid valve to open, so that the gas in the second gas path flows into the external device to inflate the external device.

[0033] In another embodiment of the present invention, as shown in Figure 2 shown, the device further includes: a first pressure gauge Y1; an input end of the first pressure gauge Y1 is connected to an output end of the pilot regulating valve XDJ1, and an output end of the first pressure gauge Y1 is connected to an input end of the third solenoid valve, and is configured to display the gas pressure collected from the output end of the pilot regulating valve XDJ1.

[0034] In this embodiment, the first pressure gauge Y1 displays the pressure collected from the output end of the pilot regulating valve XDJ1, enabling the user to intuitively view whether the pressure output from the output end of the pilot regulating valve XDJ1 is a preset value.

[0035] In another embodiment of the present invention, as shown in Figure 2 shown, the device further includes: a safety valve A1; the safety valve A1 is connected to a feedback end of the first pressure gauge Y1, and is configured to open when the pressure value output by the first pressure gauge Y1 exceeds a threshold value of the safety valve A1.

[0036] In this embodiment, when the pressure of the safety valve A1 exceeds a preset value, the safety valve A1 opens, allowing the gas in the second gas path to flow outwards, preventing an explosion due to excessive pressure in the gas path.

[0037] In another embodiment of the present invention, the device further includes: an orifice plate FE1; the input end of the orifice plate FE1 is connected to the output end of the first solenoid valve DF1, and the output end of the orifice plate FE1 is connected to the input end of the first pressure sensor YC1, for buffering the gas pressure flowing into the first gas path.

[0038] In this embodiment, the orifice plate FE1 is used to exchange the gas flowing into the first gas path, preventing the gas from directly impacting the first pressure sensor YC1 and improving the acquisition accuracy of the first pressure sensor YC1.

[0039] Figure 3 It is a structural diagram of another inflating device provided by an embodiment of the present invention, as Figure 3 shown, the device further includes: a first three-way valve QF1; the input end of the first three-way valve QF1 is connected to the output end of the second pressure sensor YC2, the first output end of the first three-way valve QF1 is connected to the outside, and the second output end of the first three-way valve QF1 is connected to an external device.

[0040] In this embodiment, when inflating an external device, the output end of the second pressure sensor YC2 is controlled to be conducted with the second output end of the first three-way valve QF1, and the first output end of the first three-way valve QF1 is closed; when it is necessary to remove the inflating device after inflation is completed, the output end of the second pressure sensor YC2 is controlled to be connected to the outside, and the gas in the second gas path is discharged therefrom. It should be noted that a second pressure gauge Y2 is also installed between the output end of the second pressure sensor YC2 and the input end of the first three-way valve QF1, for displaying the collected gas pressure input to the external device, facilitating the user to directly observe the gas pressure filled into the external device.

[0041] In another embodiment of the present invention, as Figure 3 shown, the device further includes: a second three-way valve QF2; the input end of the second three-way valve QF2 is connected to the external gas source, the first output end of the second three-way valve QF2 is connected to the outside, and the second output end of the second three-way valve QF2 is respectively connected to the output end of the first solenoid valve DF1 and the input end of the pilot regulating valve XDJ1.

[0042] In this embodiment, when it is necessary to remove the inflation device after inflation is completed, it is connected to the outside through the second three-way valve QF2 to discharge the gas in the gas path. It should be noted that specifically, a third pressure gauge Y3 can also be set between the second output ends of the second three-way valve QF2 for output between the first gas path and the second gas path to display the gas pressure of the input external gas source, facilitating the user to directly observe the gas pressure output by the external gas source. A filter G1 can also be set between the external gas source and the input end of the second three-way valve QF2 to filter the gas output by the external gas source and prevent impurities from flowing into the device and causing blockage.

[0043] Figure 4 The circuit diagram of an inflation control circuit provided by an embodiment of the present invention is as Figure 4 shown. The inflation device includes an inflation control circuit, and the inflation control circuit includes: a UPS power supply U2, an inflation switch S1, a first contact switch ALM1, and a first relay K1; the first end of the inflation switch S1 is connected to the first end of the first contact switch ALM1, and the second end of the inflation switch S1 is connected to the positive pole of the UPS power supply U2; both ends of the first switch K11 of the first relay K1 are connected in parallel with the inflation switch S1; both ends of the coil of the first relay K1 are connected to the second end of the first contact switch ALM1 and grounded respectively; both ends of the first pressure sensor YC1 are connected to the positive pole of the UPS power supply U2 and the controller U1 respectively; both ends of the second pressure sensor YC2 are connected to the positive pole of the UPS power supply U2 and the controller U1 respectively; both ends of the second switch K12 of the first relay K1 are connected to the positive pole of the UPS power supply U2 and the first control end of the third solenoid valve respectively; the second control end of the third solenoid valve is grounded.

[0044] In this embodiment, when inflation is required, the inflation switch S1 is pressed, and the second pressure sensor YC2 sends the collected second pressure value to the controller U1. When the controller U1 determines that the second pressure value is less than the preset value, the controller U1 controls the first contact switch ALM1 to be attracted, the coil of the first relay K1 is energized, the first switch K11 of the first relay K1 is closed to lock the inflation switch S1, and the second switch K12 of the first relay K1 is also closed, and the third solenoid valve is opened to start inflating the external device; when the controller U1 determines that the second pressure value is higher than the preset value, the controller U1 controls the first contact switch ALM1 to open, the inflation switch S1 is locked and opened, and inflation stops. By adjusting the preset value of the controller U1, different pressure values of gas can be output to the external device.

[0045] Figure 5 The circuit diagram of another inflation control circuit provided by an embodiment of the present invention is as Figure 5As shown, the inflation control circuit further includes: a third relay K3, a fourth relay K4, a second contact switch ALM2, and a third contact switch ALM3; both ends of the second contact switch ALM2 are respectively connected to the positive pole of the UPS power supply U2 and the first end of the coil of the third relay K3; the second end of the coil of the third relay K3 is grounded; the first end of the first switch of the third relay K3 is connected to the positive pole of the UPS power supply U2, and the second end of the second switch of the third relay K3 is connected to the first control end of the first solenoid valve DF1; the second control end of the first solenoid valve DF1 is grounded; both ends of the third contact switch ALM3 are respectively connected to the positive pole of the UPS power supply U2 and the first end of the coil of the fourth relay K4; the second end of the coil of the fourth relay K4 is grounded; both ends of the first switch of the fourth relay K4 are respectively connected to the positive pole of the UPS power supply U2 and the first control end of the second solenoid valve DF2, and the second end of the second solenoid valve DF2 is grounded.

[0046] In the embodiment of the present invention, when the first pressure sensor YC1 detects that the first pressure value at the feedback end of the pilot control valve XDJ1 is lower than the preset value of the controller U1, the controller U1 controls the second contact switch ALM2 to close, so that the coil of the third relay K3 is energized, the first switch of the third relay K3 closes, and the first solenoid valve DF1 opens. When the first pressure sensor YC1 sends the collected first pressure value to the controller U1 and the controller U1 determines that the first pressure value is the preset value, the controller U1 controls the second contact switch ALM2 to disconnect, the first solenoid valve DF1 disconnects, the pressure at the feedback end of the pilot control valve XDJ1 is constant, and the pressure output at the output end of the conductance control valve is constant; when the pressure at the feedback end is too high, the controller U1 controls the third contact switch ALM3 to close, the coil of the fourth relay K4 is energized, and controls the second solenoid valve DF2 to open to reduce the pressure at the output end of the pilot control valve XDJ1.

[0047] It should be noted that diodes are connected in parallel at both ends of each solenoid valve for protection, and diodes are connected in parallel at both ends of the switch of each relay for protection.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An inflating device, characterized in that, The device includes: a first solenoid valve, a first pressure sensor, a second solenoid valve, a pilot regulating valve, and a controller; The input end of the first solenoid valve is connected to an external air source through a first air path, and the control end of the first solenoid valve is electrically connected to the controller, and is used to open or close according to a first control signal sent by the controller to allow the gas output by the external air source to flow into the first air path; The input end of the first pressure sensor is connected to the output end of the first solenoid valve through a first air path, and the feedback end of the first pressure sensor is connected to the controller, and is used to send the first pressure value of the first air path collected to the controller, so that the controller generates a second control signal according to the first pressure value; The input end of the second solenoid valve is connected to the output end of the first pressure sensor through a first air path, the output end of the second solenoid valve is connected to the outside through a first air path, and the control end of the second solenoid valve is connected to the controller, and is used to open or close according to the second control signal to adjust the gas pressure in the first air path; The input end of the pilot regulating valve is connected to an external air source through a second air path, and the feedback end of the pilot regulating valve is connected to the calibration interface of the first pressure sensor, and is used to make the gas pressure output by the output end consistent with the first pressure value according to the first pressure value; The device further includes: a third solenoid valve; The input end of the third solenoid valve is connected to the input end of the pilot regulating valve, the output end of the third solenoid valve is connected to an external device, and the control end of the third solenoid valve is connected to the controller, and is used to open or close according to a third control signal sent by the controller to allow the gas output by the output end of the pilot regulating valve to inflate the external device; The device further includes: a second pressure sensor ; The input end of the second pressure sensor is connected to the output end of the third solenoid valve, the output end of the second pressure sensor is connected to the external device, and the control end of the second pressure sensor is connected to the controller, and is used to collect the second pressure value of the gas input to the external device, so that the controller sends a third control signal to control the third solenoid valve to open or close. The device further includes: a first pressure gauge; the input end of the first pressure gauge is connected to the output end of the pilot regulating valve, and the output end 2. The inflating device according to claim 1, characterized in that, of the first pressure gauge is connected to the input end of the third solenoid valve, and is used to display the gas pressure output by the output end of the pilot regulating valve collected; The device further includes: a safety valve; 3. An inflation device according to claim 2, wherein, The safety valve is connected to the feedback end of the first pressure gauge, and is used to open when the pressure value output by the first pressure gauge exceeds the threshold of the safety valve. The device further includes: a first three-way valve; 4. An inflation device according to claim 1, characterized in that, The input end of the first three-way valve is connected to the output end of the second pressure sensor, the first output end of the first three-way valve is connected to the outside, and the second output end of the first three-way valve is connected to an external device. ​ 5. An inflation device as claimed in claim 1, wherein, The device further includes: a second three-way valve; an input end of the second three-way valve is connected to the external air source, a first output end of the second three-way valve is connected to the outside, and a second output end of the second three-way valve is respectively connected to an output end of the first solenoid valve and an input end of the pilot regulating valve.

6. The inflating device according to claim 1, characterized in that, The device further includes: an orifice plate; An input end of the orifice plate is connected to the output end of the first solenoid valve, and an output end of the orifice plate is connected to an input end of the first pressure sensor, for buffering the gas pressure flowing into the first gas path.

7. An inflation device according to claim 1, characterized in that, The inflation device includes an inflation control circuit, The inflation control circuit includes: a UPS power supply, an inflation switch, a first contact switch, and a first relay; A first end of the inflation switch is connected to a first end of the first contact switch, and a second end of the inflation switch is connected to the positive pole of the UPS power supply; Both ends of a first switch of the first relay are connected in parallel with the inflation switch; Both ends of a coil of the first relay are respectively connected to a second end of the first contact switch and grounded; Both ends of the first pressure sensor are respectively connected to the positive pole of the UPS power supply and the controller; Both ends of the second pressure sensor are respectively connected to the positive pole of the UPS power supply and the controller; Both ends of a second switch of the first relay are respectively connected to the positive pole of the UPS power supply and a first control end of the third solenoid valve; a second control end of the third solenoid valve is grounded. The inflation control circuit further includes: a third relay, a fourth relay, a second contact switch, and a third contact switch; 8. An inflation device according to claim 7, characterized in that, Both ends of the second contact switch are respectively connected to the positive pole of the UPS power supply and a first end of a coil of the third relay; A second end of the coil of the third relay is grounded; A first end of a first switch of the third relay is connected to the positive pole of the UPS power supply, and a second end of a second switch of the third relay is connected to a first control end of the first solenoid valve; A second control end of the first solenoid valve is grounded; Both ends of the third contact switch are respectively connected to the positive pole of the UPS power supply and a first end of a coil of the fourth relay; A second end of the coil of the fourth relay is grounded; Both ends of a first switch of the fourth relay are respectively connected to the positive pole of the UPS power supply and a first control end of the second solenoid valve, and a second end of the second solenoid valve is grounded. ​ ​ ​

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