Movable pump truck

Abstract

The utility model discloses a movable pump truck, which comprises a frame, the rotor pump is arranged on the frame; the motor is arranged on the frame and connected with the rotor pump; the control box is used for controlling the motor to drive the rotor pump to operate; one end of the rotor pump is communicated with a liquid inlet pipe section, the other end of the rotor pump is communicated with a liquid outlet pipe section, a pressure adjusting pipe section is connected between the liquid outlet pipe section and the liquid inlet pipe section, and when the motor stops running and liquid conveying stops, liquid in the liquid outlet pipe section flows back through the pressure adjusting pipe section, and pressure relief is conducted on the liquid outlet pipe section and the liquid inlet pipe section. When liquid conveying is stopped, the pressure in the liquid inlet pipe section and the pressure in the liquid outlet pipe section are increased instantly, the liquid in the liquid outlet pipe section can flow back to the liquid inlet pipe section only through the pressure adjusting pipe section by arranging the pressure adjusting pipe section, and therefore the pressure relief function is achieved, the service life of the pipeline is prolonged, and the safety of the pipeline is improved. The movable pump truck can be used for a long time, is suitable for various working conditions, has mobility and is convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump equipment, and particularly relates to a mobile pump truck. Background Art

[0002] The rotary pump is a form of positive displacement pump. It consists of a rotating rotor and a stationary pump body. It has no suction or discharge valves. The working volume is changed by the relative movement between the rotor and the pump body, and the liquid is discharged by the extrusion action of the rotating rotor. At the same time, a space is left on the other side to form a negative pressure, so that the liquid is continuously sucked in.

[0003] The existing pump sets are mostly fixed pump sets, which are easily damaged when encountering earthquakes or other abnormal weather, resulting in the equipment being unable to be used normally and affecting work efficiency.

[0004] A mobile pump truck, also known as a mobile hydraulic pump station or a mobile pump station, replaces the original fixed pump station. Due to its vehicle-mounted installation, it is convenient and fast to operate, and is a new type of equipment for water conservancy flood control and drought relief irrigation.

[0005] In the prior art, when adding liquid to the equipment through a mobile pump truck, when the liquid is full and the pump body stops running, the pressure in the pipeline is too high, which is likely to cause the pipeline to come off, and even cause the pipeline to burst, resulting in the mobile pump truck being unable to be used, thereby reducing the service life of the mobile pump truck. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the above-mentioned technical problems existing in the prior art, and provide a mobile pump truck. By setting a rotary pump, a motor and a control box on the vehicle frame, one end of the rotary pump is connected to the liquid inlet pipe section, and the other end is connected to the liquid outlet pipe section. A pressure regulating pipe section is arranged between the liquid inlet pipe section and the liquid outlet pipe section. After the control box controls the motor to run, the liquid enters the rotary pump from the liquid inlet pipe section and then is discharged from the liquid outlet pipe section. When the control box controls the motor to stop running and the liquid stops being transported, the pressure in the liquid inlet pipe section and the liquid outlet pipe section increases instantaneously. The setting of the pressure regulating pipe section enables the liquid located in the liquid outlet pipe section to only flow back to the liquid inlet pipe section through the pressure regulating pipe section, thereby playing a role in relieving pressure, prolonging the service life of the pipeline, and ensuring that the mobile pump truck can be used for a long time.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] Mobile pump truck, comprising: a vehicle frame; a rotor pump provided on the vehicle frame; an electric motor provided on the vehicle frame, the electric motor being connected to the rotor pump; a control box for controlling the electric motor to drive the rotor pump to operate; a liquid inlet pipe section communicated with one end of the rotor pump, a liquid outlet pipe section communicated with the other end of the rotor pump, a pressure regulating pipe section connected between the liquid outlet pipe section and the liquid inlet pipe section. When the electric motor stops operating and the liquid stops being conveyed, the liquid in the liquid outlet pipe section flows back through the pressure regulating pipe section to relieve the pressure of the liquid outlet pipe section and the liquid inlet pipe section. In the utility model, by arranging a rotor pump, an electric motor and a control box on the vehicle frame, one end of the rotor pump is connected to the liquid inlet pipe section, the other end is connected to the liquid outlet pipe section, a pressure regulating pipe section is arranged between the liquid inlet pipe section and the liquid outlet pipe section. After the control box controls the electric motor to operate, the liquid enters the rotor pump from the liquid inlet pipe section and then is discharged from the liquid outlet pipe section. When the control box controls the electric motor to stop operating and the liquid stops being conveyed, the pressure in the liquid inlet pipe section and the liquid outlet pipe section instantaneously increases. The arrangement of the pressure regulating pipe section enables the liquid in the liquid outlet pipe section to only flow back to the liquid inlet pipe section through the pressure regulating pipe section, thereby playing a role in relieving pressure, prolonging the service life of the pipeline, and ensuring that the mobile pump truck can be used for a long time.

[0009] Further, the liquid inlet pipe section includes an inlet pipe, a connecting pipe one and a check valve. An inlet liquid port is provided at one end of the rotor pump. One end of the connecting pipe one is communicated with the inlet liquid port. The check valve is connected between the other end of the connecting pipe one and one end of the inlet pipe. The check valve controls the one-way conveyance of the liquid. When the liquid is being conveyed, the liquid enters from the inlet pipe, passes through the check valve and enters the connecting pipe one, and then enters the rotor pump from the connecting pipe one. When the liquid conveyance stops, the liquid in the liquid outlet pipe section cannot enter the inlet pipe through the connecting pipe one.

[0010] Further, the inlet pipe includes a quick connector one, an elbow one, a straight pipe one and a connecting flange one. The elbow one is communicated between the quick connector one and the straight pipe one. The connecting flange one is provided at one end of the straight pipe one close to the check valve. The connecting pipe one includes a connecting flange two, a conversion head, an elbow two, a straight pipe two and an interface. One end of the interface is communicated with the inlet liquid port, the other end of the interface is communicated with one end of the straight pipe two. The elbow two is communicated between the other end of the straight pipe two and one end of the conversion head. The connecting flange two is connected to the other end of the conversion head. The check valve is installed between the connecting flange one and the connecting flange two. The check valve is installed between the connecting flange one and the connecting flange two and is fixedly connected through the connecting flange one and the connecting flange two to realize the connection and communication between the inlet pipe, the connecting pipe one and the check valve. The quick connector one is provided to facilitate the connection of the inlet pipe.

[0011] Further, the liquid outlet pipe section includes a second connecting pipe and a drain pipe. One end of the second connecting pipe communicates with the rotor pump, and a third connecting flange is provided at the other end of the second connecting pipe. The drain pipe includes a second quick connector, a third elbow pipe, a third straight pipe, and a fourth connecting flange. The third elbow pipe is connected between the second quick connector and the third straight pipe, and the fourth connecting flange is connected to one end of the third straight pipe close to the rotor pump. The fourth connecting flange is fixedly connected to the third connecting flange. By fixing the third connecting flange and the fourth connecting flange, the second connecting pipe and the drain pipe are communicated, and the setting of the second quick connector facilitates the connection of the drain pipe.

[0012] Further, the pressure regulating pipe section includes a fourth straight pipe, a reducing joint, a safety valve, and a fifth straight pipe. One end of the fourth straight pipe communicates with the inlet pipe, the other end of the fourth straight pipe communicates with one end of the reducing joint, the other end of the reducing joint communicates with one end of the safety valve, a straight pipe joint is connected to the other end of the safety valve, one end of the fifth straight pipe is connected to the straight pipe joint, and the other end of the fifth straight pipe communicates with the drain pipe. The fourth straight pipe communicates with the inlet pipe, and the fifth straight pipe communicates with the drain pipe. When the motor stops running and the liquid stops being transported, the pressure in the pipeline is too high, and the liquid flows back, causing the safety valve to open automatically. At the same time, cooperating with the check valve, the liquid in the drain pipe enters the fifth straight pipe, passes through the safety valve, and then is sent into the inlet pipe through the fourth straight pipe, thus playing a role in relieving pressure and avoiding excessive pressure in the pipeline, increasing the service life of the mobile pump truck.

[0013] Further, a pipeline joint is connected to one end of the fourth straight pipe close to the safety valve, a pressure transmitter is connected to the pipeline joint, and the pressure transmitter is electrically connected to the control box; a liquid filling gun is connected to the end of the liquid outlet pipe section far from the rotor pump, a pressure sensor is provided in the liquid filling gun, and the pressure sensor is electrically connected to the pressure transmitter. After the pressure sensor senses the liquid, through the cooperation of the pressure transmitter and the control box, the motor is controlled to stop running. During the liquid filling process with the liquid filling gun, when the liquid is full, after the pressure sensor senses the liquid, the signal is transmitted to the pressure transmitter, and then the signal is transmitted from the pressure transmitter to the control box, and the control box controls the motor to stop running, thereby controlling the rotor pump to stop running and stopping the continuous liquid filling.

[0014] Further, a branch pipe communicates with one end of the fourth straight pipe close to the inlet pipe, a three-way joint is connected to the top of the branch pipe, and an exhaust valve is connected to one end of the three-way joint; a fourth elbow pipe is connected to the other end of the three-way joint, and a digital display pressure gauge is connected to the end of the fourth elbow pipe. During the process of the liquid entering the fourth straight pipe through the fifth straight pipe, the setting of the exhaust valve can discharge the liquid in the pipeline, playing a role in assisting pressure relief, and the digital display pressure gauge can display the pressure in the pipeline.

[0015] Further, the motor and the rotor pump are connected by a coupling. The setting of the coupling is used to connect the motor and the rotor pump, and the motor controls the rotation of the rotor pump through the coupling. A protective cover is fixedly connected to the vehicle frame, and the protective cover covers the coupling. The setting of the protective cover plays a protective role for the coupling.

[0016] Furthermore, a submersible pump is detachably connected to the vehicle frame, and the submersible pump is communicated with the liquid inlet pipe section. During the liquid transportation on the horizontal plane, the liquid can be directly pumped by the rotor pump. When transporting the liquid below the horizontal plane, remove the submersible pump on the vehicle frame. After pumping the liquid up by the submersible pump, it is sent into the rotor pump through the liquid inlet pipe section.

[0017] Furthermore, rollers are provided at the bottom of the vehicle frame, and a rubber handle is connected to one end of the vehicle frame. Through the rubber handle, it is convenient for the operator to push the vehicle frame, and the setting of the rollers facilitates the movement of the vehicle frame.

[0018] Due to the adoption of the above technical solutions, the utility model has the following beneficial effects:

[0019] In the utility model, a rotor pump, a motor and a control box are arranged on the vehicle frame. One end of the rotor pump is connected to the liquid inlet pipe section, and the other end is connected to the liquid outlet pipe section. A pressure regulating pipe section is arranged between the liquid inlet pipe section and the liquid outlet pipe section. After the control box controls the motor to run, the liquid enters the rotor pump from the liquid inlet pipe section and then is discharged from the liquid outlet pipe section. When the control box controls the motor to stop running and the liquid stops being transported, the pressure in the liquid inlet pipe section and the liquid outlet pipe section increases instantaneously. The setting of the pressure regulating pipe section enables the liquid located in the liquid outlet pipe section to only flow back to the liquid inlet pipe section through the pressure regulating pipe section, thereby playing a role in pressure relief, prolonging the service life of the pipeline, and ensuring that the mobile pump truck can be used for a long time.

[0020] In the utility model, the liquid inlet pipe section includes an inlet pipe, a connecting pipe one and a check valve. An inlet for liquid is provided at one end of the rotor pump. One end of the connecting pipe one is communicated with the inlet for liquid, and the check valve is connected between the other end of the connecting pipe one and one end of the inlet pipe. The setting of the check valve controls the one-way transportation of the liquid. When the liquid is transported, the liquid enters from the inlet pipe, enters the connecting pipe one through the check valve, and then enters the rotor pump from the connecting pipe one. When the liquid transportation stops, the liquid in the liquid outlet pipe section cannot enter the inlet pipe through the connecting pipe one.

[0021] In the utility model, the pressure regulating pipe section includes a straight pipe four, a reducing joint, a safety valve and a straight pipe five. One end of the straight pipe four is communicated with the inlet pipe, the other end of the straight pipe four is communicated with one end of the reducing joint, the other end of the reducing joint is communicated with one end of the safety valve, a straight pipe joint is connected to the other end of the safety valve, one end of the straight pipe five is connected to the straight pipe joint, and the other end of the straight pipe five is communicated with the drain pipe. The straight pipe four is communicated with the inlet pipe, and the straight pipe five is communicated with the drain pipe. When the motor stops running and the liquid stops being transported, the pressure in the pipeline is too high and the liquid flows back, causing the safety valve to open automatically. At the same time, in cooperation with the check valve, the liquid in the drain pipe enters the straight pipe five, passes through the safety valve, and then is sent into the inlet pipe through the straight pipe four, thereby playing a role in pressure relief, avoiding excessive pressure in the pipeline, and increasing the service life of the mobile pump truck.

[0022] Specific liquid adding process: The control box controls the operation of the motor, driving the rotor pump to operate. After the liquid enters from the inlet pipe, it enters the rotor pump through the check valve and connecting pipe 1. Then the liquid enters the drain pipe through connecting pipe 2, and finally is discharged from the drain pipe to complete the liquid adding. After the liquid adding is completed, when the pressure sensor senses the liquid, the signal is transmitted to the pressure transmitter, and then the pressure transmitter transmits the signal to the control box. The control box controls the motor to stop operating, thereby controlling the rotor pump to stop operating and stop continuous liquid adding. The liquid in the pipeline flows back, causing the safety valve to open. Cooperating with the check valve, the returned liquid flows into straight pipe 4 through straight pipe 5, and then enters the inlet pipe from straight pipe 4, thus completing the pressure relief of the pipeline. The exhaust valve discharges the gas to assist in pressure relief. Description of the Drawings

[0023] The present utility model will be further described below in conjunction with the drawings:

[0024] Figure 1 It is a schematic structural diagram of the connection of the liquid inlet pipe section, rotor pump and liquid outlet pipe section in the present utility model;

[0025] Figure 2 It is a schematic structural diagram of the vehicle frame in the present utility model;

[0026] Figure 3 It is a top view of the vehicle frame in the present utility model.

[0027] In the figure, 1 - vehicle frame; 2 - rotor pump; 3 - motor; 4 - control box; 5 - liquid inlet pipe section; 6 - liquid outlet pipe section; 7 - pressure regulating pipe section; 8 - inlet pipe; 9 - connecting pipe 1; 10 - check valve; 11 - liquid inlet; 12 - quick connector 1; 13 - elbow 1; 14 - straight pipe 1; 15 - connecting flange 1; 16 - connecting flange 2; 17 - adapter; 18 - elbow 2; 19 - straight pipe 2; 20 - interface; 21 - connecting pipe 2; 22 - drain pipe; 23 - connecting flange 3; 24 - quick connector 2; 25 - elbow 3; 26 - straight pipe 3; 27 - connecting flange 4; 28 - straight pipe 4; 29 - reducer joint; 30 - safety valve; 31 - straight pipe 5; 32 - straight pipe joint; 33 - pipeline joint; 34 - pressure transmitter; 35 - branch pipe; 36 - tee joint; 37 - exhaust valve; 38 - elbow 4; 39 - digital display pressure gauge; 40 - coupling; 41 - protective cover; 42 - rubber handle; 43 - roller; 44 - submersible pump. Specific Embodiments

[0028] As Figures 1 to 3As shown in the figure, the present utility model relates to a mobile pump truck, which includes: a vehicle frame 1; a rotor pump 2 provided on the vehicle frame 1; an electric motor 3 provided on the vehicle frame 1, and the electric motor 3 is connected to the rotor pump 2; a control box 4 for controlling the electric motor 3 to drive the rotor pump 2 to operate; one end of the rotor pump 2 is communicated with a liquid inlet pipe section 5, the other end of the rotor pump 2 is communicated with a liquid outlet pipe section 6, and a pressure regulating pipe section 7 is connected between the liquid outlet pipe section 6 and the liquid inlet pipe section 5. When the electric motor 3 stops operating and the liquid stops being transported, the liquid in the liquid outlet pipe section 6 flows back through the pressure regulating pipe section 7 to relieve the pressure of the liquid outlet pipe section 6 and the liquid inlet pipe section 5.

[0029] The liquid inlet pipe section 5 includes an inlet pipe 8, a connecting pipe 9 and a check valve 10. An inlet liquid port 11 is provided at one end of the rotor pump 2. One end of the connecting pipe 9 is communicated with the inlet liquid port 11, and the check valve 10 is connected between the other end of the connecting pipe 9 and one end of the inlet pipe 8. The check valve 10 controls the one-way transportation of the liquid. When the liquid is transported, after the liquid enters from the inlet pipe 8, it enters the connecting pipe 9 through the check valve 10, and then enters the rotor pump 2 from the connecting pipe 9. When the liquid transportation stops, the liquid in the liquid outlet pipe section 6 cannot enter the inlet pipe 8 through the connecting pipe 9.

[0030] The inlet pipe 8 includes a quick connector 12, a bent pipe 13, a straight pipe 14 and a connecting flange 15. The bent pipe 13 is communicated between the quick connector 12 and the straight pipe 14. The connecting flange 15 is provided at one end of the straight pipe 14 close to the check valve 10. The connecting pipe 9 includes a connecting flange 16, an adapter 17, a bent pipe 18, a straight pipe 19 and an interface 20. One end of the interface 20 is communicated with the inlet liquid port 11, and the other end of the interface 20 is communicated with one end of the straight pipe 19. The bent pipe 18 is communicated between the other end of the straight pipe 19 and one end of the adapter 17. The connecting flange 16 is connected to the other end of the adapter 17. The check valve 10 is installed between the connecting flange 15 and the connecting flange 16. The check valve 10 is installed between the connecting flange 15 and the connecting flange 16 and then fixedly connected through the connecting flange 15 and the connecting flange 16 to realize the connection between the inlet pipe 8, the connecting pipe 9 and the check valve 10. The quick connector 12 is provided to facilitate the connection of the inlet pipe 8.

[0031] The liquid outlet pipe section 6 includes a connecting pipe 21 and a drain pipe 22. One end of the connecting pipe 21 is communicated with the rotor pump 2, and a connecting flange 23 is provided at the other end of the connecting pipe 21. The drain pipe 22 includes a quick connector 24, a bent pipe 25, a straight pipe 26 and a connecting flange 27. The bent pipe 25 is communicated between the quick connector 24 and the straight pipe 26. The connecting flange 27 is connected to one end of the straight pipe 26 close to the rotor pump 2. The connecting flange 27 is fixedly connected to the connecting flange 23. By fixing the connecting flange 23 and the connecting flange 27, the connecting pipe 21 and the drain pipe 22 are communicated. The quick connector 24 is provided to facilitate the connection of the drain pipe 22.

[0032] The pressure regulating pipe section 7 includes a straight pipe four 28, a reducing joint 29, a safety valve 30 and a straight pipe five 31. One end of the straight pipe four 28 is communicated with the inlet pipe 8, the other end of the straight pipe four 28 is communicated with one end of the reducing joint 29, the other end of the reducing joint 29 is communicated with one end of the safety valve 30, a straight pipe joint 32 is connected to the other end of the safety valve 30, one end of the straight pipe five 31 is connected to the straight pipe joint 32, and the other end of the straight pipe five 31 is communicated with the drain pipe 22. The straight pipe four 28 is communicated with the inlet pipe 8, and the straight pipe five 31 is communicated with the drain pipe 22. When the motor 3 stops running and the liquid stops being transported, the pressure in the pipeline is too high and the liquid flows back, causing the safety valve 30 to open automatically. At the same time, cooperating with the check valve 10, the liquid in the drain pipe 22 enters the straight pipe five 31, then passes through the safety valve 30, and is then sent into the inlet pipe 8 through the straight pipe four 28, thereby playing a pressure relief role, avoiding excessive pressure in the pipeline, and increasing the service life of the mobile pump truck.

[0033] One end of the straight pipe four 28 close to the safety valve 30 is connected with a pipeline joint 33, the pipeline joint 33 is connected with a pressure transmitter 34, and the pressure transmitter 34 is electrically connected to the control box 4; one end of the liquid outlet pipe section 6 far from the rotor pump 2 is connected with a liquid filling gun, a pressure sensor is arranged in the liquid filling gun, and the pressure sensor is electrically connected to the pressure transmitter 34. After the pressure sensor senses the liquid, through the cooperation of the pressure transmitter 34 and the control box 4, the control box 4 controls the motor 3 to stop running. During the liquid filling process through the liquid filling gun, when the liquid is full, after the pressure sensor senses the liquid, the signal is transmitted to the pressure transmitter 34, and then the signal is transmitted from the pressure transmitter 34 to the control box 4, and the control box 4 controls the motor 3 to stop running, thereby controlling the rotor pump 2 to stop running and stop continuous liquid filling.

[0034] One end of the straight pipe four 28 close to the inlet pipe 8 is communicated with a branch pipe 35, the top of the branch pipe 35 is connected with a three-way joint 36, and one end of the three-way joint 36 is connected with an exhaust valve 37; the other end of the three-way joint 36 is connected with a bent pipe four 38, and the end of the bent pipe four 38 is connected with a digital display pressure gauge 39. During the process of the liquid entering the straight pipe four 28 through the straight pipe five 31, the setting of the exhaust valve 37 can discharge the liquid in the pipeline, playing an auxiliary pressure relief role, and the digital display pressure gauge 39 can display the pressure in the pipeline.

[0035] The motor 3 and the rotor pump 2 are connected through a coupling 40. The setting of the coupling 40 is used to connect the motor 3 and the rotor pump 2, and the motor 3 controls the rotor pump 2 to rotate through the coupling 40. The vehicle frame 1 is fixedly connected with a protective cover 41, and the protective cover 41 covers the coupling 40. The setting of the protective cover 41 plays a protective role for the coupling 40.

[0036] A submersible pump 44 is detachably connected to the vehicle frame 1, and the submersible pump 44 is communicated with the liquid inlet pipe section 5. During the liquid transportation on the horizontal plane, the liquid can be directly pumped by the rotor pump 2. When transporting the liquid below the horizontal plane, the submersible pump 44 on the vehicle frame 1 is removed. After the liquid is pumped up by the submersible pump 44, it is sent into the rotor pump 2 through the liquid inlet pipe 5 section.

[0037] Rollers 43 are provided at the bottom of the vehicle frame 1, and a rubber handle 42 is connected to one end of the vehicle frame 1. Through the rubber handle 42, it is convenient for the operator to push the vehicle frame 1, and the setting of the rollers 43 facilitates the movement of the vehicle frame 1.

[0038] In the utility model, a rotor pump 2, a motor 3 and a control box 4 are arranged on the vehicle frame 1. One end of the rotor pump 2 is connected to the liquid inlet pipe section 5, and the other end is connected to the liquid outlet pipe section 6. A pressure regulating pipe section 7 is arranged between the liquid inlet pipe section 5 and the liquid outlet pipe section 6. After the control box 4 controls the motor 3 to run, the liquid enters the rotor pump 2 from the liquid inlet pipe section 5 and then is discharged from the liquid outlet pipe section 6. When the control box 4 controls the motor 3 to stop running and the liquid stops being transported, the pressure in the liquid inlet pipe section 5 and the liquid outlet pipe section 6 increases instantaneously. The setting of the pressure regulating pipe section 7 enables the liquid located in the liquid outlet pipe section 6 to only flow back to the liquid inlet pipe section 5 through the pressure regulating pipe section 7, thereby playing a role in pressure relief, prolonging the service life of the pipeline, and ensuring that the mobile pump truck can be used for a long time.

[0039] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made on the basis of the utility model to solve basically the same technical problems and achieve basically the same technical effects are all covered by the protection scope of the utility model.

Claims

1. Mobile pump truck, comprising: Frame; Rotary pump, provided on the frame; Motor, provided on the frame, the motor is connected to the rotary pump; Control box, used to control the motor to drive the rotary pump to operate; It is characterized in that: One end of the rotary pump is communicated with a liquid inlet pipe section, the other end of the rotary pump is communicated with a liquid outlet pipe section, and a pressure regulating pipe section is connected between the liquid outlet pipe section and the liquid inlet pipe section. When the motor stops running and the liquid stops being transported, the liquid in the liquid outlet pipe flows back through the pressure regulating pipe section to relieve the pressure of the liquid outlet pipe section and the liquid inlet pipe section.

2. The mobile pump truck according to claim 1, characterized in that: The liquid inlet pipe section includes an inlet pipe, a connecting pipe one and a check valve. One end of the rotary pump is provided with a liquid inlet. One end of the connecting pipe one is communicated with the liquid inlet. The check valve is connected between the other end of the connecting pipe one and one end of the inlet pipe.

3. The mobile pump truck according to claim 2, wherein: The inlet pipe includes a quick connector one, a bent pipe one, a straight pipe one and a connecting flange one. The bent pipe one is communicated between the quick connector one and the straight pipe one. The connecting flange one is provided at one end of the straight pipe one close to the check valve. The connecting pipe one includes a connecting flange two, a conversion head, a bent pipe two, a straight pipe two and an interface. One end of the interface is communicated with the liquid inlet. The other end of the interface is communicated with one end of the straight pipe two. The bent pipe two is communicated between the other end of the straight pipe two and one end of the conversion head. The connecting flange two is connected to the other end of the conversion head. The check valve is installed between the connecting flange one and the connecting flange two.

4. The mobile pump truck according to claim 2, characterized in that: The liquid outlet pipe section includes a connecting pipe two and a liquid discharge pipe. One end of the connecting pipe two is communicated with the rotary pump. The other end of the connecting pipe two is provided with a connecting flange three. The liquid discharge pipe includes a quick connector two, a bent pipe three, a straight pipe three and a connecting flange four. The bent pipe three is communicated between the quick connector two and the straight pipe three. The connecting flange four is connected to one end of the straight pipe three close to the rotary pump. The connecting flange four is fixedly connected to the connecting flange three.

5. The mobile pump truck according to claim 4, wherein: The pressure regulating pipe section includes a straight pipe four, a reducing joint, a safety valve and a straight pipe five. One end of the straight pipe four is communicated with the inlet pipe. The other end of the straight pipe four is communicated with one end of the reducing joint. The other end of the reducing joint is communicated with one end of the safety valve. The other end of the safety valve is connected with a straight pipe joint. One end of the straight pipe five is connected to the straight pipe joint. The other end of the straight pipe five is communicated with the liquid discharge pipe.

6. The mobile pump truck according to claim 5, characterized in that: A pipeline joint is connected to one end of the straight pipe four close to the safety valve. The pipeline joint is connected with a pressure transmitter. The pressure transmitter is electrically connected to the control box; A liquid adding gun is connected to the end of the liquid outlet pipe section far from the rotary pump. A pressure sensor is provided in the liquid adding gun. The pressure sensor is electrically connected to the pressure transmitter. After the pressure sensor senses the liquid, it cooperates with the pressure transmitter and the control box to control the motor to stop running.

7. The mobile pump truck according to claim 5, characterized in that: One end of the straight pipe near the inlet pipe is connected with a branch pipe. The top of the branch pipe is connected with a three-way joint. One end of the three-way joint is connected with an exhaust valve; the other end of the three-way joint is connected with a fourth elbow pipe, and the end of the fourth elbow pipe is connected with a digital pressure gauge.

8. The mobile pump truck according to claim 1, characterized in that: The motor and the rotor pump are connected by a coupling; the vehicle frame is fixedly connected with a protective cover, and the protective cover covers the coupling.

9. The mobile pump truck according to claim 1, characterized in that: A submersible pump is detachably connected to the vehicle frame, and the submersible pump is communicated with the liquid inlet pipe section.

10. The mobile pump truck according to claim 1, wherein: Rollers are provided at the bottom of the vehicle frame, and a rubber handle is connected to one end of the vehicle frame.

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