CN109630422B

CN109630422B - Control circuit of self-priming pump water testing machine

Info

Publication number: CN109630422B
Application number: CN201811410974.1A
Authority: CN
Inventors: 赵华勇
Original assignee: Jiangsu Clp Pump Valve Manufacturing Co Ltd
Current assignee: Jiangsu CLP pump valve manufacturing Co., Ltd.
Priority date: 2018-11-24
Filing date: 2018-11-24
Publication date: 2020-05-19
Anticipated expiration: 2038-11-24
Also published as: CN109630422A

Abstract

The invention relates to a control circuit of a self-priming pump water tester. The circuit comprises a detection circuit, a result display circuit and a reset circuit; the detection circuit comprises a starting button, a relay KM1, a solenoid valve KM2, a solenoid valve KM3, a time relay KT1, a relay KM4, a time relay KT2, a time relay KT3, a relay KM5, a control coil KM6 of a normally open solenoid valve I, a control coil KM7 of a normally open solenoid valve II, a socket and a normally closed contact of the relay KM 10; the result display circuit comprises normally closed contacts of an electric contact pressure gauge, an electric contact vacuum gauge, a relay KM8, a relay KM9, an indicator lamp X1, an indicator lamp X2 and a relay KM 10; the reset circuit comprises a reset button and a coil of the relay KM 10. By using the self-priming pump water tester, the manual action is greatly simplified when the self-priming pump water tester works.

Description

Control circuit of self-priming pump water testing machine

Technical Field

The invention relates to a control circuit, in particular to a control circuit of a self-priming pump water tester.

Background

The self-sucking pump shown in the figure 1 is a pump which is commonly used in life, the self-sucking pump is provided with a water inlet 1 and a water outlet 2, the self-sucking pump has parameters such as lift and suction lift, a factory can leave a factory after testing the self-sucking pump, most of the existing testing equipment is the water testing machine shown in the figure 2, and the water testing machine is provided with a flat plate 3, a first sealing head 5, a first air cylinder 6, a pressure gauge 7, a vacuum gauge 8, a second sealing head 11, a second air cylinder 13 and a rack; the flat plate 3 is fixedly connected to the frame, and a clamp for clamping the self-priming pump is arranged on the flat plate 3; the first cylinder 6 is fixedly connected to the frame; the first sealing head 5 is fixedly connected to a moving rod of the first air cylinder 6, the first sealing head 5 is provided with a first water through port, a first sealing port 4 and a first connecting port 9, and the first water through port is connected with the first sealing port 4 and the first connecting port 9; the second air cylinder 13 is fixedly connected to the frame; the second sealing head 11 is fixedly connected to a moving rod of the second air cylinder 13, the second sealing head 11 is provided with a second water through port, a second sealing port 12 and a second connecting port 10, and the second water through port is connected with the second sealing port 12 and the second connecting port 10; the pressure gauge 7 is fixedly connected to the frame, and the pressure gauge 7 is connected with a first water through opening at the first connection port 9 and used for displaying the pressure of the first water through opening; the vacuum meter 8 is fixedly connected to the rack, and the vacuum meter 8 is connected with a water through port II at the position of the connecting port II 10 and used for displaying the pressure of the water through port II; when the water circulation device works, the first water through opening and the second water through opening are both connected with a water source to form a circulation water path, the first manual valve is positioned between the first water through opening and the water source, and the second manual valve is positioned between the second water through opening and the water source; the water testing machine comprises the following steps: firstly, a self-priming pump is placed at a clamp of a flat plate 3 and fixed, wherein a first sealing port 4 faces a water outlet 2, a second sealing port 12 faces a water inlet 1, then a starting button is pressed to start a water testing machine, a first air cylinder 6 and a second air cylinder 13 both extend out of a moving rod, a first sealing port 4 of a first sealing head 5 abuts against the water outlet 2 and is sealed, a second sealing port 12 of a second sealing head 11 abuts against the water inlet 1 and is sealed, a first manual valve and a second manual valve are manually opened, the self-priming pump is manually connected with a power supply, the self-priming pump is started, the first manual valve is manually closed after a period of time, a first water inlet and a water source are closed, the pressure at the first water inlet is increased, the pressure value of a pressure gauge 7, namely, whether a lift reaches a rated value is observed, then the second manual valve is closed after the first manual valve is manually opened, the second water inlet, whether the vacuum pressure value of observing vacuum gauge 8 inhales the journey promptly reaches the rated value, then the manual self priming pump that closes, press stop button cylinder 6 again and cylinder two 13 all stretch back the transfer pole, take out the self priming pump that tests, put according to the test result, then test next one again. The actions of the water testing machine which need to be finished manually are as follows: the self-priming pump is started and closed by pressing a start button and a stop button, the pressure gauge 7 and the vacuum gauge 8 are observed, the actions of the first manual valve and the second manual valve are started and closed, and the like, the manual spiritual power is greatly influenced, and in order to simplify the manual actions, a control circuit of the water tester needs to be changed.

Disclosure of Invention

The invention aims to provide a control circuit of the self-priming pump water tester, which simplifies manual actions during working.

The technical scheme adopted by the invention is as follows: the control circuit of the self-priming pump water tester comprises a detection circuit, a result display circuit and a reset circuit; the detection circuit comprises a starting button, a relay KM1, a solenoid valve KM2, a solenoid valve KM3, a time relay KT1, a relay KM4, a time relay KT2, a time relay KT3, a relay KM5, a control coil KM6 of a normally open solenoid valve I, a control coil KM7 of a normally open solenoid valve II, a socket and a normally closed contact of the relay KM 10; wherein the starting button, the coil of the relay KM1 and the normally closed contact of the relay KM10 are connected in series and are connected with a power supply, and the starting button and the normally closed contact of the relay KM10 are connected with the power supply; the series connection division point of the coil of the relay KM1 and the normally closed contact of the relay KM10 is point A, and the series connection division point of the start button and the coil of the relay KM1 is point B; the normally open contact of the relay KM1 is connected in parallel with the starting button; a coil of the solenoid valve KM2 is connected in parallel with a coil of the relay KM 1; a coil of the solenoid valve KM3 is connected in parallel with a coil of the relay KM 1; the coil of the time relay KT1 is connected in parallel with the coil of the relay KM 1; the time relay KT1 is of an electrified delay type, one end of a normally open contact of the time relay KT1 is connected to a point B, and the other end of the normally open contact of the time relay KT1 is connected to one end of a coil of the relay KM 4; the other end of the coil of the relay KM4 is connected to a point A; the series connection division point of a normally open contact of the time relay KT1 and the coil of the relay KM4 is a point C; one end of a normally open contact of the relay KM4 is connected to a point C, and the other end of the normally open contact of the relay KM4 is connected to one end of the socket; the other end of the socket is connected with a point A; the coil of the time relay KT2 is connected in parallel with the coil of the relay KM 4; the time relay KT2 is of an electrified delay type, one end of a normally open contact of the time relay KT2 is connected to a point C, and the other end of the normally open contact of the time relay KT2 is connected to one end of a coil of the time relay KT 3; the other end of the coil of the time relay KT3 is connected to a point A; the series connection division point of a normally open contact of the time relay KT2 and a coil of the time relay KT3 is a point D; the time relay KT3 is of an electrified delay type, one end of a normally open contact of the time relay KT3 is connected to a D point, and the other end of the normally open contact of the time relay KT3 is connected to one end of a coil of the relay KM 5; the other end of the coil of the relay KM5 is connected to a point A; one end of a normally closed contact of the relay KM5 is connected to a point D, and the other end of the normally closed contact of the relay KM5 is connected to one end of a control coil KM6 of a normally open electromagnetic valve I; the other end of the control coil KM6 is connected to a point A; one end of a normally open contact of the relay KM5 is connected to a point D, and the other end of the normally open contact of the relay KM5 is connected to one end of a control coil KM7 of a normally open electromagnetic valve II; the other end of the control coil KM7 is connected to a point A; the result display circuit comprises normally closed contacts of an electric contact pressure gauge, an electric contact vacuum gauge, a relay KM8, a relay KM9, an indicator lamp X1, an indicator lamp X2 and a relay KM 10; the wiring of the electric contact pressure gauge comprises a signal end I and a public end I, wherein the wiring of the electric contact pressure gauge, a coil of the relay KM8 and the normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact pressure gauge and the normally closed contact of the relay KM10 are connected with the power supply; the normally open contact of the relay KM8 is connected in parallel with the wiring of the electric contact pressure gauge; the indicator lamp X1 is connected in parallel with the coil of the relay KM 8; the wiring of the electric contact vacuum meter comprises a signal end II and a public end II, wherein the wiring of the electric contact vacuum meter, a coil of the relay KM9 and a normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact vacuum meter and the normally closed contact of the relay KM10 are connected with the power supply; the normally open contact of the relay KM9 is connected in parallel with the wiring of the electric contact vacuum meter; the indicator lamp X2 is connected in parallel with the coil of the relay KM 9; the series connection division point of the coil of the relay KM8 and the normally closed contact of the relay KM10 is point A; the reset circuit comprises a reset button and a coil of a relay KM 10; the reset button is connected in series with a coil of the relay KM10 and is connected with a power supply; the normally closed contact of the relay KM10 belongs to the detection circuit and the result display circuit.

The invention has the beneficial effects that: the self-priming pump water tester greatly simplifies manual actions during test work.

Drawings

The invention is further described below with reference to the accompanying drawings.

Fig. 1 is a simple schematic diagram of a target self-priming pump for water testing of a water testing machine according to the present invention.

Fig. 2 is a schematic view of a water tester to which the present invention is directed.

Fig. 3 is a partially enlarged view of fig. 2.

Fig. 4 is a simple schematic diagram of a waterway system in the water testing machine of the present invention.

FIG. 5 is a schematic diagram of a detection circuit in the control circuit of the present invention.

FIG. 6 is a diagram of a result display circuit in the control circuit according to the present invention.

Fig. 7 is a schematic diagram of a reset circuit in the control circuit of the present invention.

FIG. 8 is an alternative embodiment of a result display circuit in the control circuit of the present invention.

In the figure:

1: a water inlet 2: a water outlet 3: plate 4: sealing port one 5: the first sealing head 6: the first cylinder is 7: a pressure gauge 8: vacuum gauge 9: connection port one 10: connection port two 11: and a second sealing head 12: sealing the second port 13: and a second air cylinder 14: a first three-way joint 15: opening one 16: normally open electromagnetic valve one 17: and a second opening 18: normally open electromagnetic valve two 19: port three 20: port four 21: a second three-way joint 22: start button 23: socket 24: electric contact pressure gauge 25: signal terminal one 26: common port one 27: electric contact vacuum gauge 28: signal terminal two 29: the second common terminal 30: a reset button.

Detailed Description

Fig. 5 to 7 are schematic diagrams of a control circuit of a self-priming pump water tester of the present invention, and the control circuit of the self-priming pump water tester comprises a detection circuit, a result display circuit and a reset circuit; as shown in fig. 5, the detection circuit includes a start button 22, a relay KM1, a solenoid valve KM2, a solenoid valve KM3, a time relay KT1, a relay KM4, a time relay KT2, a time relay KT3, a relay KM5, a control coil KM6 of a normally open solenoid valve one 16, a control coil KM7 of a normally open solenoid valve two 18, a socket 23 and normally closed contacts of a relay KM 10; wherein the coil of the starting button 22 and the relay KM1 is connected in series with the normally closed contact of the relay KM10 and is connected with the power supply, and the normally closed contact of the starting button 22 and the relay KM10 is connected with the power supply; the series connection division point of the coil of the relay KM1 and the normally closed contact of the relay KM10 is point A, and the series connection division point of the start button 22 and the coil of the relay KM1 is point B; the normally open contact of the relay KM1 is connected in parallel with the starting button 22; a coil of the solenoid valve KM2 is connected in parallel with a coil of the relay KM 1; a coil of the solenoid valve KM3 is connected in parallel with a coil of the relay KM 1; the coil of the time relay KT1 is connected in parallel with the coil of the relay KM 1; the time relay KT1 is of an electrified delay type, one end of a normally open contact of the time relay KT1 is connected to a point B, and the other end of the normally open contact of the time relay KT1 is connected to one end of a coil of the relay KM 4; the other end of the coil of the relay KM4 is connected to a point A; the series connection division point of a normally open contact of the time relay KT1 and the coil of the relay KM4 is a point C; one end of a normally open contact of the relay KM4 is connected to a point C, and the other end of the normally open contact of the relay KM4 is connected to one end of the socket 23; the other end of the socket 23 is connected to the point A; the coil of the time relay KT2 is connected in parallel with the coil of the relay KM 4; the time relay KT2 is of an electrified delay type, one end of a normally open contact of the time relay KT2 is connected to a point C, and the other end of the normally open contact of the time relay KT2 is connected to one end of a coil of the time relay KT 3; the other end of the coil of the time relay KT3 is connected to a point A; the series connection division point of a normally open contact of the time relay KT2 and a coil of the time relay KT3 is a point D; the time relay KT3 is of an electrified delay type, one end of a normally open contact of the time relay KT3 is connected to a D point, and the other end of the normally open contact of the time relay KT3 is connected to one end of a coil of the relay KM 5; the other end of the coil of the relay KM5 is connected to a point A; one end of a normally closed contact of the relay KM5 is connected to a point D, and the other end of the normally closed contact of the relay KM5 is connected to one end of a control coil KM6 of a normally open electromagnetic valve I16; the other end of the control coil KM6 is connected to a point A; one end of a normally open contact of the relay KM5 is connected to a point D, and the other end of the normally open contact of the relay KM5 is connected to one end of a control coil KM7 of a normally open electromagnetic valve II 18; the other end of the control coil KM7 is connected to a point A; as shown in fig. 6, the result display circuit includes normally closed contacts of the electric contact pressure gauge 24, the electric contact vacuum gauge 27, the relay KM8, the relay KM9, the indicator lamp X1, the indicator lamp X2 and the relay KM 10; the wiring of the electric contact pressure gauge 24 comprises a signal end I25 and a common end I26 (when the set pressure is between the lower limit and the upper limit, the signal end I25 is communicated with the common end I26), wherein the wiring of the electric contact pressure gauge 24 (which means the signal end I25 and the common end I26), a coil of the relay KM8 and the normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact pressure gauge 24 and the normally closed contact of the relay KM10 are connected with the power supply; the normally open contact of the relay KM8 is connected in parallel with the wiring of the electric contact pressure gauge 24; the indicator lamp X1 is connected in parallel with the coil of the relay KM 8; the wiring of the electric contact vacuum meter 27 comprises a signal end II 28 and a common end II 29 (the signal end II 28 is communicated with the common end II 29 when the vacuum pressure is set between the lower limit and the upper limit), wherein the wiring of the electric contact vacuum meter 27 (which means the signal end II 28 and the common end II 29), a coil of the relay KM9 and a normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact vacuum meter 27 and the normally closed contact of the relay KM10 are connected with the power supply; the normally open contact of the relay KM9 is connected in parallel with the wiring of the electric contact vacuum meter 27; the indicator lamp X2 is connected in parallel with the coil of the relay KM 9; the series connection division point of the coil of the relay KM8 and the normally closed contact of the relay KM10 is point A; as can be seen from fig. 7, the reset circuit includes reset button 30 and the coil of relay KM 10; the coil of the reset button 30 and the coil of the relay KM10 are connected in series and are connected with a power supply; the normally closed contact of the relay KM10 belongs to the detection circuit and the result display circuit.

The water testing machine provided with the control circuit works in such a way that the water testing machine is connected with a pneumatic system and the control circuit and is connected with a power supply and an air source, wherein the electromagnetic valve KM2 controls the expansion of the first air cylinder 6, and the electromagnetic valve KM3 controls the expansion of the second air cylinder 13. As shown in fig. 4, in the waterway system, one through port of a first tee joint 14 is connected with a first water through port at a first 9 position of a connecting port of a first sealing head 5 in a sealing manner, the first tee joint 14 also comprises other two through ports, namely a first through port 15 and a second through port 17, an electro-contact pressure gauge 24 is fixedly connected to a rack, the electro-contact pressure gauge 24 is connected with the second through port 17 and communicated with the first water through port, one end of a first normally-open electromagnetic valve 16 is connected with the first through port 15 and communicated with the first water through port, and the other end of the first normally-open electromagnetic valve 16 is connected with a water source; one port of the second three-way joint 21 is hermetically connected with a second water through port at the second connection port 10 of the second sealing head 11, the second three-way joint 21 also has other two ports, namely a third port 19 and a fourth port 20, the electric contact vacuum meter 27 is fixedly connected on the rack, the electric contact vacuum meter 27 is connected with the third port 19 and is communicated with the second water through port, one end of the second normally-open electromagnetic valve 18 is connected with the fourth port 20 and is communicated with the second water through port, and the other end of the second normally-open electromagnetic valve 18 is connected with a water source; the electric contact pressure gauge 24 senses the water pressure at a first water through opening in the first sealing head 5, a lower limit pointer and an upper limit pointer of the electric contact pressure gauge 24 are set according to the rated lift of the self-priming pump (when the pressure received by the electric contact pressure gauge 24 reaches a set value, a first signal end 25 is communicated with a first common end 26 to indicate that the lift is qualified), the electric contact vacuum gauge 27 senses the vacuum pressure at a second water through opening in the second sealing head 11, and when the vacuum pressure value received by the electric contact vacuum gauge 27 reaches a set value, a second signal end 28 is communicated with a second common end 29 to indicate that the lift is qualified), the invention comprises the following steps: 1) firstly, the self-priming pump is placed on a clamp of a flat plate 3 and fixed, wherein a first sealing port 4 faces a water outlet 2, a second sealing port 12 faces a water inlet 1, and a power plug of the self-priming pump is inserted into a socket 23. 2) Then, a starting button 22 is pressed to start the water testing machine, a coil of a relay KM1 is electrified, a normally open contact of the relay KM1 is closed to realize self locking, a coil of a solenoid valve KM2 is electrified, the solenoid valve KM2 controls a movable rod extending out of a first cylinder 6, a first sealing port 4 of a first sealing head 5 abuts against a water outlet 2 and is sealed, a first water through port is communicated with the water outlet 2, a coil of a solenoid valve KM3 is electrified, a solenoid valve KM3 controls a movable rod extending out of a second cylinder 13, a second sealing port 12 of a second sealing head 11 abuts against a water inlet 1 and is sealed, and a second water through port is communicated. A coil of a time relay KT1, a coil of an electromagnetic valve KM2 and a coil of an electromagnetic valve KM3 are electrified simultaneously, after a period of time is counted (the time ensures that a sealing head I5 seals a water outlet 2 and a sealing head II 11 seals a water inlet 1), a normally open contact of the time relay KT1 is closed, a coil of a relay KM4 is electrified, a normally open contact of a relay KM4 is closed to electrify a socket 23, namely, a self-priming pump is electrified to work, a coil of a time relay KT2 is electrified simultaneously, after a period of time is counted (the self-priming pump is electrified to work for a period of time to form waterway circulation flow), a normally open contact of the time relay KT2 is closed, a normally closed contact of a relay KM5 is electrified to electrify 6, a coil of the time relay KT3 is electrified simultaneously, a coil of the relay KM6 is electrified to close a normally open electromagnetic valve I16, namely, a water inlet is, the result shows that a coil of a relay KM8 in the circuit is electrified, a normally open contact of a relay KM8 is closed to realize self-locking, an indicator lamp X1 is electrified and lightened, when the pressure does not reach a set value received by an electric contact pressure gauge 24, a signal end I25 and a common end I26 are always disconnected, an indicator lamp X1 is not lightened, a time relay KT3 times for a period of time (the time is timed to ensure that the signal end I25 is communicated with the common end I26 when the pressure received by the electric contact pressure gauge 24 reaches the set value under the normal condition of the self-priming pump lift), a normally open contact of a time relay KT3 is closed, a coil of the relay KM5 is electrified, the normally open contact of a relay KM5 is closed, a normally closed contact of a relay KM5 is separated, the coil of a relay KM6 is not electrified to open a normally open electromagnetic valve I16, the coil of, if the vacuum pressure reaches the set value received by the electric contact vacuum gauge 27, the second signal end 28 is communicated with the second common end 29, the result shows that the coil of the relay KM9 in the circuit is electrified, the normally open contact of the relay KM9 is closed to realize self-locking, the indicator lamp X2 is electrified and is lightened, and if the vacuum pressure does not reach the set value received by the electric contact vacuum gauge 27, the second signal end 28 is always disconnected with the second common end 29, and the indicator lamp X2 is lightened. 3) After a period of time, the condition of the indicator light X1 and the indicator light X2 is checked to judge whether the self-priming pump meets the standard, and if the indicator light X1 and the indicator light X2 are both lighted, the self-priming pump is qualified. When the reset button 30 is pressed, the coil of the relay KM10 is electrified, the normally closed contact of the relay KM10 is separated, the detection circuit and the result display circuit are reset, and the first air cylinder 6 and the second air cylinder 13 extend back to move the rod. 4) And (3) pulling out a plug of the self-priming pump, taking out the self-priming pump, putting the self-priming pump well according to the inspection result, and returning to the step 1) to test other untested self-priming pumps. Compared with the prior water testing machine, the manual valve I and the manual valve II do not need to be operated in midway by manpower, the pressure gauge and the vacuum gauge do not need to be observed in midway, and the manual operation is greatly simplified.

FIG. 8 is an alternative embodiment of a result display circuit in the control circuit of the present invention. As shown in the figure, the result in the above technical scheme shows that the circuit has an alternative embodiment, and the alternative embodiment comprises an electric contact pressure gauge 24, an electric contact vacuum gauge 27, a relay KM8, a relay KM9 and a relay KM 10; the wiring of the electric contact pressure gauge 24 comprises a signal end I25 and a common end I26 (when the set pressure is between the lower limit and the upper limit, the signal end I25 is communicated with the common end I26), wherein the wiring of the electric contact pressure gauge 24 (which means the signal end I25 and the common end I26), a coil of the relay KM8 and the normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact pressure gauge 24 and the normally closed contact of the relay KM10 are connected with the power supply; the relay KM8 is provided with a normally open contact KM8a and a normally open contact KM8b, and the normally open contact KM8a of the relay KM8 is connected in parallel with the wiring of the electric contact pressure gauge 24; the wiring of the electric contact vacuum meter 27 comprises a signal end II 28 and a common end II 29 (the signal end II 28 is communicated with the common end II 29 when the vacuum pressure is set between the lower limit and the upper limit), wherein the wiring of the electric contact vacuum meter 27 (which means the signal end II 28 and the common end II 29), a coil of the relay KM9 and a normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact vacuum meter 27 and the normally closed contact of the relay KM10 are connected with the power supply; the relay KM9 is provided with a normally open contact KM9a and a normally open contact KM9b, and the normally open contact KM9a of the relay KM9 is connected with the wiring of the electric contact vacuum meter 27 in parallel; the series connection division point of the coil of the relay KM8 and the normally closed contact of the relay KM10 is point A; the normally open contact KM8b of the relay KM8, the normally open contact KM9b of the relay KM9, the coil of the relay KM10 and the normally closed contact of the relay KM10 are connected in series and are connected with a power supply. After the replacement result display circuit is used, if the self-priming pump is qualified during testing, the coil of the relay KM8 is electrified, the normally open contact KM8a of the relay KM8 is closed to realize self-locking, the coil of the relay KM9 is electrified, the normally open contact KM9a of the relay KM9 is closed to realize self-locking, the normally open contact KM8b and the normally open contact KM9b are also closed to enable the coil of the relay KM10 to be electrified, the normally closed contact of the relay KM10 is separated, the detection circuit and the result display circuit are reset, the first cylinder 6 and the second cylinder 13 extend back to move the rod, and the reset.

In addition to the above embodiments, the present invention has other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a control circuit of self priming pump water test machine which characterized in that: the control circuit of the self-priming pump water tester comprises a detection circuit, a result display circuit and a reset circuit; the detection circuit comprises a starting button, a relay KM1, a solenoid valve KM2, a solenoid valve KM3, a time relay KT1, a relay KM4, a time relay KT2, a time relay KT3, a relay KM5, a control coil KM6 of a normally open solenoid valve I, a control coil KM7 of a normally open solenoid valve II, a socket and a normally closed contact of the relay KM 10; wherein the starting button, the coil of the relay KM1 and the normally closed contact of the relay KM10 are connected in series and are connected with a power supply, and the starting button and the normally closed contact of the relay KM10 are connected with the power supply; the series connection division point of the coil of the relay KM1 and the normally closed contact of the relay KM10 is point A, and the series connection division point of the start button and the coil of the relay KM1 is point B; the normally open contact of the relay KM1 is connected in parallel with the starting button; a coil of the solenoid valve KM2 is connected in parallel with a coil of the relay KM 1; a coil of the solenoid valve KM3 is connected in parallel with a coil of the relay KM 1; the coil of the time relay KT1 is connected in parallel with the coil of the relay KM 1; the time relay KT1 is of an electrified delay type, one end of a normally open contact of the time relay KT1 is connected to a point B, and the other end of the normally open contact of the time relay KT1 is connected to one end of a coil of the relay KM 4; the other end of the coil of the relay KM4 is connected to a point A; the series connection division point of a normally open contact of the time relay KT1 and the coil of the relay KM4 is a point C; one end of a normally open contact of the relay KM4 is connected to a point C, and the other end of the normally open contact of the relay KM4 is connected to one end of the socket; the other end of the socket is connected with a point A; the coil of the time relay KT2 is connected in parallel with the coil of the relay KM 4; the time relay KT2 is of an electrified delay type, one end of a normally open contact of the time relay KT2 is connected to a point C, and the other end of the normally open contact of the time relay KT2 is connected to one end of a coil of the time relay KT 3; the other end of the coil of the time relay KT3 is connected to a point A; the series connection division point of a normally open contact of the time relay KT2 and a coil of the time relay KT3 is a point D; the time relay KT3 is of an electrified delay type, one end of a normally open contact of the time relay KT3 is connected to a D point, and the other end of the normally open contact of the time relay KT3 is connected to one end of a coil of the relay KM 5; the other end of the coil of the relay KM5 is connected to a point A; one end of a normally closed contact of the relay KM5 is connected to a point D, and the other end of the normally closed contact of the relay KM5 is connected to one end of a control coil KM6 of a normally open electromagnetic valve I; the other end of the control coil KM6 is connected to a point A; one end of a normally open contact of the relay KM5 is connected to a point D, and the other end of the normally open contact of the relay KM5 is connected to one end of a control coil KM7 of a normally open electromagnetic valve II; the other end of the control coil KM7 is connected to a point A; the result display circuit comprises normally closed contacts of an electric contact pressure gauge, an electric contact vacuum gauge, a relay KM8, a relay KM9, an indicator lamp X1, an indicator lamp X2 and a relay KM 10; the wiring of the electric contact pressure gauge comprises a signal end I and a public end I, wherein the wiring of the electric contact pressure gauge, a coil of the relay KM8 and the normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact pressure gauge and the normally closed contact of the relay KM10 are connected with the power supply; the normally open contact of the relay KM8 is connected in parallel with the wiring of the electric contact pressure gauge; the indicator lamp X1 is connected in parallel with the coil of the relay KM 8; the wiring of the electric contact vacuum meter comprises a signal end II and a public end II, wherein the wiring of the electric contact vacuum meter, a coil of the relay KM9 and a normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact vacuum meter and the normally closed contact of the relay KM10 are connected with the power supply; the normally open contact of the relay KM9 is connected in parallel with the wiring of the electric contact vacuum meter; the indicator lamp X2 is connected in parallel with the coil of the relay KM 9; the series connection division point of the coil of the relay KM8 and the normally closed contact of the relay KM10 is point A; the reset circuit comprises a reset button and a coil of a relay KM 10; the reset button is connected in series with a coil of the relay KM10 and is connected with a power supply; the normally closed contact of the relay KM10 belongs to the detection circuit and the result display circuit.

2. The control circuit of the self-priming pump water testing machine of claim 1, wherein: the result display circuit is replaced by: the result display circuit comprises an electric contact pressure gauge, an electric contact vacuum gauge, a relay KM8, a relay KM9 and a relay KM 10; the wiring of the electric contact pressure gauge comprises a signal end I and a public end I, wherein the wiring of the electric contact pressure gauge, a coil of the relay KM8 and the normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact pressure gauge and the normally closed contact of the relay KM10 are connected with the power supply; the relay KM8 is provided with a normally open contact KM8a and a normally open contact KM8b, and the normally open contact KM8a of the relay KM8 is connected in parallel with a connecting wire of an electric contact pressure gauge; the wiring of the electric contact vacuum meter comprises a signal end II and a public end II, wherein the wiring of the electric contact vacuum meter, a coil of the relay KM9 and a normally closed contact of the relay KM10 are connected in series and connected with a power supply, and the wiring of the electric contact vacuum meter and the normally closed contact of the relay KM10 are connected with the power supply; the relay KM9 is provided with a normally open contact KM9a and a normally open contact KM9b, and the normally open contact KM9a of the relay KM9 is connected with the wiring of the electric contact vacuum meter in parallel; the series connection division point of the coil of the relay KM8 and the normally closed contact of the relay KM10 is point A; the normally open contact KM8b of the relay KM8, the normally open contact KM9b of the relay KM9, the coil of the relay KM10 and the normally closed contact of the relay KM10 are connected in series and are connected with a power supply.