CN219906889U - Safety operation protection system of empty container stacking machine of container - Google Patents

Abstract

The utility model relates to the technical field of container port loading and unloading transportation equipment, in particular to a safety operation protection system of a container empty container stacking machine, which comprises a lifting appliance subsystem, a cab subsystem, a control circuit system and a control hydraulic system, wherein the lifting appliance subsystem comprises bus communication, an adaptive power supply, a front-view camera and a laser ranging sensor, and the cab subsystem comprises a system controller, a power supply adapter, a display and an audible-visual alarm. The utility model can detect and watch the relative position between containers by arranging the forward-looking camera and the laser ranging sensor, and can ensure the occurrence of accidents by arranging the audible and visual alarm, the control circuit system and the control hydraulic system to ensure that a driver perceives the relative position between containers and controls the forward tilting of the portal frame, thereby ensuring the transportation work order of the wharf and improving the transportation work efficiency of the wharf.

Description

Safety operation protection system of empty container stacking machine of container

Technical Field

The utility model relates to the technical field of container port loading and unloading transportation equipment, in particular to a safety operation protection system of a container empty container stacking machine.

Background

The empty container stacking machine (hereinafter referred to as empty fork) is always a main force for stacking empty containers, has the characteristics of high speed, flexible operation, space saving and the like, but is too close to each other while saving space, is not standard in stacking, and is easy to cause continuous collision of containers or accidents of rolling down single containers to collide with other containers (called bowling), and even if one container is dumped, other container interlocking reactions are caused, so that more containers are dumped. The life safety and the equipment safety of a driver are seriously endangered, and the driver can not see whether the lock heads above the three layers of boxes are aligned to the box holes in rainy days and at night; whether the upper and lower containers are aligned.

Disclosure of Invention

In order to solve the problems in the background art, the utility model provides a safety operation protection system of a container empty container stacking machine, which is convenient for detecting and watching the relative positions of containers and solves the problem that the existing container is easy to topple.

The utility model solves the technical problems by adopting the following scheme: the utility model provides a container empty container stacking machine safety operation protection system, including hoist subsystem and driver's cabin subsystem, control system, wherein hoist subsystem includes BUS communication, the adaptation power, the front view camera, laser range sensor, wherein the driver's cabin subsystem includes the system control ware, the power adapter, a display, audible and visual alarm, wherein BUS communication is former car CAN BUS BUS communication, the adaptation power is former car adaptation power, the front view camera is wireless infrared camera, laser range sensor installs empty fork left and right cantilever crane head top so that when the operation carries out scanning range finding to the front box distance, the front view camera installs empty fork left and right cantilever crane head top so that the operation image of gathering, system control ware and front view camera electric connection so that obtain the operation condition of empty fork, system control ware and laser range sensor electric connection so that receive laser range data, the power adapter is with former car adaptation power, the laser range sensor, the camera, the display, audible and visual alarm is direct or indirect electric connection so that obtain the adaptation power from the driver's cabin and is equipped with the control cabinet through the converter, the control ware, the audible and visual alarm is sent to the driver's cabin door frame, the control system is installed to the left and visual alarm is controlled by the driver's cabin, the control system is provided with the audio and visual alarm, the control system is used for receiving the operation image of empty fork in the driver's cabin, the operation condition is controlled by the driver's cabin, the control system is easy to be connected with the front view camera, the operation condition is controlled by the laser range crane, and the control system is used for receiving the laser range finder.

Further, the system controller is selected as CR711S.

Further, the adaptive power supply is 24V.

Furthermore, the front-view camera is a VEISE1080P wireless infrared camera IPCAM, and a 2.4GHZ wireless transmitting module is arranged in the front-view camera.

Further, the display is a digital wireless vehicle-mounted display and is a color liquid crystal display.

Further, the laser ranging sensor is selected from 01D105 laser ranging sensors with the IFM model.

Further, the control circuit system comprises a system controller, a two-position electromagnetic valve, an operating handle, a main valve, a gear pump and a locking valve, wherein the system controller is electrically connected with the two-position electromagnetic valve, the operating handle, the main valve, the gear pump and the locking valve.

Further, the control hydraulic system comprises an energy accumulator, an operating handle, a filter, a pressure reducing valve, a two-position electromagnetic valve, a main valve, a gear pump, a locking valve, an inclined oil cylinder and an oil tank, wherein the oil tank is connected with the energy accumulator, the operating handle and the main valve through oil paths, the filter and the pressure reducing valve are arranged on the oil paths of the oil tank and the operating handle, the filter and the gear pump are arranged on the oil paths of the oil tank and the main valve, the operating handle, the two-position electromagnetic valve and the main valve are sequentially connected through oil paths, the main valve is connected with the oil path of the inclined oil cylinder, and the locking valve is arranged on the oil path of the main valve for inputting the inclined oil cylinder.

Further, the system controller is in plug connection with the power adapter, the original vehicle adaptive power supply, the laser ranging sensor, the camera, the display and the audible and visual alarm through the I/O connecting terminal.

Further, the intelligent remote control system further comprises a ranging alarm circuit, the ranging alarm circuit comprises a relay K1, a relay K2, a relay K3, a relay K4, a left laser ranging sensor B1, a right laser ranging sensor B2, a buzzer H1 and a two-position three-way electromagnetic valve Y1, wherein the positive electrode of the left laser ranging sensor B1 and the positive electrode of the right laser ranging sensor B2 are electrically connected with the positive electrode of a system controller, the negative electrode of the left laser ranging sensor B1 and the negative electrode of the right laser ranging sensor B2 are electrically connected with the negative electrode of the system controller or grounded, one output end of the left laser ranging sensor B1 is electrically connected with the relay K1 and then grounded, one output end of the left laser ranging sensor B2 is electrically connected with the relay K2 and then grounded, one output end of the right laser ranging sensor B2 is electrically connected with the relay K2 and then grounded, and one output end of the right laser ranging sensor B2 is electrically connected with the negative electrode of the relay K1 and the three-way electromagnetic valve Y2 in parallel with the positive electrode of the relay K1 and the positive electrode of the relay K4, and the three-way electromagnetic valve Y1 is electrically connected in parallel with the negative electrode of the system and the relay K1.

In summary, the beneficial effects of the utility model are as follows: the utility model can detect and watch the relative position between containers by arranging the forward-looking camera and the laser ranging sensor, and can ensure the occurrence of accidents by arranging the audible and visual alarm, the control circuit system and the control hydraulic system to ensure that a driver perceives the relative position between containers and controls the forward tilting of the portal frame, thereby ensuring the transportation work order of the wharf and improving the transportation work efficiency of the wharf.

The foregoing description is only an overview of the technical solution of the present utility model, and may be implemented according to the content of the specification in order to make the technical means of the present utility model more clearly understood, and in order to make the above and other objects, features and advantages of the present utility model more clearly understood, the following specific preferred embodiment is given by way of the following detailed description in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic illustration of the present utility model;

FIG. 2 is a hydraulic oil circuit diagram of the present utility model;

FIG. 3 is a dimensional view of the left side spreader mounting plate of the present utility model;

FIG. 4 is a dimensional view of the right side spreader mounting plate of the present utility model;

fig. 5 is a circuit diagram of the operation of the laser ranging sensor of the present utility model.

In the figure: 1. an energy storage; 2. an operation handle; 3. a filter; 4. a pressure reducing valve; 5. a two-position electromagnetic valve; 6. a main valve; 7. a gear pump; 8. a locking valve; 9. tilting the oil cylinder; 10. an oil tank; b1 is a left laser ranging sensor; b2 is a right laser ranging sensor; k1 and K2 are left laser ranging sensor control relays; k3 and K4 are right laser ranging sensor control relays; h1 is a buzzer; y1 is a two-position three-way electromagnetic valve.

Detailed Description

In order that the utility model may be more readily understood, a further description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

It should be noted that, as used herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Unless otherwise indicated, the meaning of "a plurality" is two or more.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1 to 2, the safety operation protection system of the empty container stacking machine comprises a lifting appliance subsystem, a cab subsystem and a control system, wherein the lifting appliance subsystem comprises a BUS communication, an adaptive power supply, a front view camera and a laser ranging sensor, the cab subsystem comprises a system controller, a power supply adapter, a display and an audible and visual alarm, the BUS communication is an original car CAN BUS communication, the adaptive power supply is an original car adaptive power supply, the front view camera is a wireless infrared camera, the laser ranging sensor is arranged above left and right arm frames of an empty fork so as to scan and range the distance between the left and right arm frames of the empty fork during operation, the front view camera is arranged above the left and right arm frames of the empty fork so as to acquire operation images, the system controller is electrically connected with the front view camera so as to acquire operation images of the empty fork, the system controller is electrically connected with the laser ranging sensor so as to receive laser ranging data, the power supply adapter is electrically connected with the original car adaptive power supply, the laser ranging sensor, the camera, the display, the audible and visual alarm are directly or indirectly connected with the audible and visual alarm so as to acquire operation signals from the cab through the adaptive power supply, the cab, the audible and visual alarm is arranged at the left and visual alarm, the left and right arm frames of the cab are arranged at the side of the control system, the control circuit is arranged at the front view camera so as to acquire the left and right of the front frame frames of the empty container, the empty container is convenient to acquire operation images through the control system, the system controller is provided with a program for processing data obtained by laser ranging and sending a signal to the audible and visual alarm and command control system for controlling the air fork gantry when in danger. FIG. 3 is a dimensional view of the left side spreader mounting plate of the present utility model; FIG. 4 is a dimensional view of the right side spreader mounting plate of the present utility model; the waist-shaped hole is a mounting hole of the camera on the mounting plate, and the round hole is a mounting hole of the laser ranging sensor on the mounting plate.

Further, the system controller is selected as an IFM (Yi Fumen) CR711S.

Further, the adaptive power supply is 24V.

Further, the front-view camera is a VEISE1080P wireless infrared camera IPCAM, a 2.4GHZ wireless transmitting module is arranged in the front-view camera, the front-view camera is waterproof, the 6mm wide angle is 110 degrees, the camera shooting distance is 30 meters, and the transmitting distance is 100 meters.

Further, the display is a digital wireless vehicle-mounted display and is a color liquid crystal display.

Further, the laser ranging sensor is selected from 01D105 laser ranging sensors with the IFM model. The sensor outputs two signals according to the setting, and can measure the distance of 0.2 to 10 meters. The precision is + -2.5 mm.

Further, the control circuit system comprises a system controller, a two-position electromagnetic valve (5), an operating handle (2), a main valve (6), a gear pump (7) and a locking valve (8), wherein the system controller is electrically connected with the two-position electromagnetic valve (5), the operating handle (2), the main valve (6), the gear pump (7) and the locking valve (8).

Further, the control hydraulic system comprises an energy accumulator (1), an operating handle (2), a filter (3), a pressure reducing valve (4), a two-position electromagnetic valve (5), a main valve (6), a gear pump (7), a locking valve (8), an inclined oil cylinder (9) and an oil tank (10), wherein the oil tank (10) is connected with the energy accumulator (1), the operating handle (2) and the main valve (6) through oil ways, the filter (3) and the pressure reducing valve (4) are arranged on the oil ways of the oil tank (10) and the operating handle (2), the filter (3) and the gear pump (7) are arranged on the oil ways of the oil tank (10) and the main valve (6), the operating handle (2), the two-position electromagnetic valve (5) and the main valve (6) are sequentially connected through oil ways, the main valve (6) is connected with the oil ways of the inclined oil cylinder (9), and the locking valve (8) is arranged on the oil ways of the main valve (6) to the inclined oil cylinder (9).

Further, the system controller is connected with the power adapter, the original vehicle adaptive power supply, the laser ranging sensor, the camera, the display and the audible and visual alarm in a plugging manner through the I/O connecting terminal so as to detect two dangerous cases of bowling in front and bowling in front of a box pressing corner and send a protection control signal to the audible and visual alarm through the I/O connecting terminal.

Further, the intelligent remote control system further comprises a ranging alarm circuit, wherein the ranging alarm circuit comprises a relay K1, a relay K2, a relay K3, a relay K4, a left laser ranging sensor B1, a right laser ranging sensor B2, a buzzer H1 and a two-position three-way electromagnetic valve Y1, wherein the positive electrode of the left laser ranging sensor B1 and the right laser ranging sensor B2 are electrically connected with the positive electrode (DC 4V) of the system controller, the negative electrode of the left laser ranging sensor B1 and the negative electrode (DCOV) of the system controller are electrically connected or grounded (DCOV), one output end of the left laser ranging sensor B1 is electrically connected with the relay K1 and then grounded (DCOV), one output end of the left laser ranging sensor B1 is electrically connected with the relay K2 and then grounded (DCOV), one output end of the right laser ranging sensor B2 is electrically connected with the positive electrode (DCOV) of the system controller, and the negative electrode of the two-position three-way electromagnetic valve Y1 is electrically connected with the negative electrode (DCOV), and the output end of the left laser ranging sensor B2 is electrically connected with the positive electrode (DCOV) of the relay K2 and the negative electrode (DCOV) of the system 2, and the two-position three-way electromagnetic valve Y1 is electrically connected with the negative electrode (DCOV) of the system C2 and the positive electrode (DCOV) of the system and the relay B2 is electrically connected with the negative electrode of the relay C4. The ground of the negative electrode (DCOV) in the system controller is an equivalent connection, see fig. 5.

The international standard width of the container is 2350mm no matter 20 ruler and 40 ruler, a wireless camera and a laser ranging sensor are respectively arranged above two arm support heads of the empty fork, and when a lock head of the empty fork lifting tool is placed into a container lock hole, the distance from the laser ranging sensor to the front end hole of the container is 2300mm. If the front box is pressed to the rear box angle, the distance measured by the laser ranging sensor is smaller than 2300mm, the set value of the sensor is 2300mm, at the moment, the laser ranging sensor sends out an electric signal, the external relay is electrified, the photoelectric bombing device alarms to remind a driver of the front box pressing box angle, and meanwhile the driver can check the image signal transmitted by the camera to prevent bowling from happening before playing.

When the empty box stacking machine (empty fork) is used for carrying the box, the lock is placed in the box hole, the laser sensor is triggered to start detection, when the distance between the front containers is detected to be smaller than the set distance 2300mm, the first group of the laser sensor outputs a high level, the K1 relay (or K3) is powered on, the alarm sends an alarm signal to remind an operator that the front box is pressed to the rear box, the display screen can be checked at any time, and the front box is prevented from being pressed to the rear box for bowling.

When the empty fork stacks the boxes at the shellfish position, if a driver judges the positions of the box to be placed inaccurately, the box is likely to push the front-row container to fall, the distance between the two boxes is measured by the two laser ranging sensors additionally arranged on the lifting appliance, a gap of 20mm is reserved between the two boxes, the width of the front box 2300mm is additionally set to 2320mm, when the empty fork stacks the boxes, if the distance is smaller than 2320mm, the laser sensors output a high level from the second group, the K2 relay (or K4) is electrified, the buzzer alarms, the empty fork door frame is electrified when the empty fork door frame is forwards inclined, the door frame can not be forwards inclined, the distance between the two boxes is ensured to be 20mm, and thus the occurrence of forward bowling is prevented.

When empty case stacking machine stacks case, when laser sensor detects 2320mm data, will send the signal of telecommunication, makes two-position three way solenoid valve power, empty fork portal will not incline forward, and C2C 4 relay is power simultaneously, audible and visual annunciator will send alarm signal, reminds the driver to keep 20 mm's clearance with the front box distance.

When the gear pump (7) works, two paths of high-pressure hydraulic oil are generated, one path of high-pressure hydraulic oil is sent to the main valve (6), the other path of high-pressure oil charges the energy accumulator (1), then the low-pressure hydraulic oil is changed into low-pressure control oil through the filter (3) and the pressure reducing valve (4), when an empty fork driver pushes the operating handle (2), the low-pressure oil flows through the two-position electromagnetic valve (5) additionally arranged to push the valve core of the main valve, the inclined oil cylinder (9) stretches out, the door frame inclines forwards, when the laser ranging sensor detects 2320mm, the two-position electromagnetic valve is powered on, the control oil path is cut off, the door frame stops inclining forwards, and therefore the front container cannot be pushed, and the bowling is prevented from happening. Also ensure that the two boxes have a gap of 20 mm. Wherein (10) is an oil tank, and (8) is a locking valve.

Program description:

1, 2 groups of laser ranging sensors are arranged on a vehicle body, parameter values of the laser ranging sensors are set, 2300mm of short-distance sensing is performed, and 2320mm of long-distance sensing is performed;

2, 4 internal variables are established in the program, and are respectively: when the distance measured by one laser ranging sensor is 2300; the distance measured by the other laser ranging sensor is 2300; when the distance measured by one laser ranging sensor is 2320; the distance measured by the other laser ranging sensor is 2320, and the 4 variables are used for storing real-time data of the laser ranging sensor; namely: iaser1_sensor_distance_2300, iaser1_sensor_distance_2320, laser2_sensor_distance_2300, laser2_sensor_distance_2320;

3, when the distance measured by one laser ranging sensor plus the distance measured by the other laser ranging sensor is 2300mm, namely the distance measured by Iaser1_sensor_distance_2300 plus laser2_sensor_distance_2300 is 2300mm, setting the internal Buzzer as 1, and sending out an audible and visual alarm signal by the audible and visual alarm;

4, when the distance measured by one laser ranging sensor plus the distance measured by the other laser ranging sensor is 2320mm, namely the distance measured by Iaser1_sensor_distance_2320 plus laser2_sensor_distance_2320 is 2320mm, the internal Y1 variable is set to be 1, the electromagnetic valve is output to be set, the hydraulic valve is controlled, and the action is generated.

The utility model can detect and watch the relative position between containers by arranging the forward-looking camera and the two laser ranging sensors, and can ensure the drivers to perceive the relative position between the containers and control the forward tilting of the portal frame by arranging the audible and visual alarm, the control circuit system and the control hydraulic system, thereby preventing accidents, ensuring the transportation work order of the wharf and improving the transportation work efficiency of the wharf.

Specifically, the method has the following beneficial effects:

1, the distance between containers can be accurately detected by using a laser ranging sensor, bowling can be prevented from being pushed forward, data are provided for accurate stacking of the containers, when a empty fork is in box stacking operation, if a driver judges the position of a box to be placed inaccurately, the empty fork portal continues to push forward, possibly pushing a front row of boxes, at the moment, a protection system gives a front box pushing protection signal, brakes the forward tilting of the machine, and gives an alarm to the driver;

2, the front-view camera with night vision can be used for viewing gaps between containers at night, providing reference for operation of a driver, providing a video image of a box stacking area in which the top of the lifting appliance looks down to a user in the whole process of lifting the lifting appliance, stacking the boxes and carrying the boxes, assisting the user in judging the top condition of the boxes during operation, judging whether the front boxes are pressed to the corners of the rear boxes, judging whether the holes of the boxes are deformed and the like;

the utility model uses the audible and visual alarm with sound and flashing light to remind the driver of the operation, two laser ranging sensors are arranged above the left arm support head and the right arm support head of the air fork, the front box distance is scanned and measured during the operation, the laser ranging sensors convert the measured data into electric signals, and then the electric signals are sent to a system controller (IFM CR711S PLC) in a cab through the communication of a lifting appliance subsystem (IFM CR 3200) and a CAN BUS (original vehicle with communication wires), and the system controller (PLC) triggers the audible and visual alarm to work to remind the driver that the front container is touched; while the display (Veise) will display the fault code;

4, the utility model controls the inclination of the portal frame by controlling the hydraulic system area, thereby providing convenience for the operation of a driver;

and 5, the utility model can prevent the front box pressing corner from bowling, when the empty fork is used for carrying the box, if the front box placing position is deviated forward, the rear box corner or the box edge is pressed, when the empty fork is lifted, the operation box can lift the front box together, and at the moment, the protection system gives a front box pressing corner protection signal and gives an alarm to a driver.

The above examples are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and modifications made by those skilled in the art based on the present utility model are included in the scope of the present utility model.

Claims (10)

1. The utility model provides a container empty container stacking machine safety operation protection system which characterized in that: the automatic lifting device comprises a lifting appliance subsystem, a cab subsystem and a control system, wherein the lifting appliance subsystem comprises a BUS communication, an adaptive power supply, a front view camera and a laser ranging sensor, the cab subsystem comprises a system controller, a power supply adapter, a display and an audible and visual alarm, the BUS communication is an original car CAN BUS BUS communication, the adaptive power supply is an original car adaptive power supply, the front view camera is a wireless infrared camera, the laser ranging sensor is arranged above the left and right air fork arm support heads so as to scan and range the distance of a front box during operation, the front view camera is provided with an operation image which is collected by the left and right air fork arm support heads, the system controller is electrically connected with the front view camera so as to obtain the operation working condition of the air fork, the system controller is electrically connected with the laser ranging sensor so as to receive laser ranging data, the power adapter is directly or indirectly connected with the original car adaptive power supply, the camera, the display and the audible and visual alarm so as to obtain the operation signal from the cab through the adapter, the left and visual fork arm support heads and the control system, and the audible and visual alarm are arranged on the left and visual fork control system.

2. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the system controller is selected as CR711S.

3. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the adaptive power supply is 24V.

4. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the front-view camera is a VEISE1080P wireless infrared camera IPCAM, and a 2.4GHZ wireless transmitting module is arranged in the front-view camera.

5. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the display is a digital wireless vehicle-mounted display and is a color liquid crystal display.

6. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the laser ranging sensor is an IFM type 01D105 laser ranging sensor.

7. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the control circuit system comprises a system controller, a two-position electromagnetic valve, an operating handle, a main valve, a gear pump and a locking valve, wherein the system controller is electrically connected with the two-position electromagnetic valve, the operating handle, the main valve, the gear pump and the locking valve.

8. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the control hydraulic system comprises an energy accumulator, an operating handle, a filter, a pressure reducing valve, a two-position electromagnetic valve, a main valve, a gear pump, a locking valve, an inclined oil cylinder and an oil tank, wherein the oil tank is connected with the energy accumulator, the operating handle and the main valve through oil paths, the filter and the pressure reducing valve are arranged on the oil paths of the oil tank and the operating handle, the filter and the gear pump are arranged on the oil paths of the oil tank and the main valve, the operating handle, the two-position electromagnetic valve and the main valve are sequentially connected through the oil paths, the main valve is connected with the oil path of the inclined oil cylinder, and the locking valve is arranged on the oil path of the main valve for inputting the inclined oil cylinder.

9. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: the system controller is connected with the power adapter, the original vehicle adaptive power supply, the laser ranging sensor, the camera, the display and the audible and visual alarm in a plugging manner through the I/0 wiring terminal.

10. The container empty-box stacking machine safety operation protection system according to claim 1, wherein: still include range finding alarm circuit, range finding alarm circuit includes relay K1, relay K2, relay K3, relay K4, left laser range finding sensor B1, right laser range finding sensor B2, bee calling organ H1, two-position three way solenoid valve Y1, wherein the positive pole of left laser range finding sensor B1, right laser range finding sensor B2 and the positive pole electric connection of system controller, the negative pole of left laser range finding sensor B1, right laser range finding sensor B2 and the negative pole electric connection of system controller or ground connection, an output of left laser range finding sensor B1 and relay K1 electric connection back ground, an output of left laser range finding sensor B1 and relay K2 electric connection back ground connection, an output of right laser range finding sensor B2 and relay K1 back ground connection, an output of right laser range finding sensor B2 and K2 and relay K1 positive pole electric connection, two-position three way solenoid valve Y1 and negative pole electric connection, the negative pole electric connection of system K2 and three way solenoid valve K1 and negative pole electric connection.