Special agriculture and forestry spraying equipment for helicopter

Abstract

The utility model discloses a special agriculture and forestry spraying device for a helicopter. The control function of the agriculture and forestry spraying device is achieved. A special agriculture and forestry spraying device for a helicopter comprises a pesticide box, a pesticide pump assembly and a spraying rod assembly, the pesticide pump assembly is connected with the pesticide box and the spraying rod assembly, the pesticide pump assembly comprises a pesticide pump and a control valve, the special agriculture and forestry spraying device further comprises an electric control system, and the electric control system comprises an electrical system, a main power source relay and a control handle; the control handle is electrically connected with the main power supply relay, the control handle is used for controlling power-on and power-off, a pump switch and a control switch are arranged on the control handle, the pump switch is electrically connected with the medicine pump, and the control switch is electrically connected with the control valve.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopters, in particular to a special agricultural and forestry spraying device for helicopters. Background Art

[0002] The BELL 407 helicopter currently has a certain inventory in the domestic general aviation helicopter market. Most of the agricultural and forestry spraying devices for helicopters used by domestic general aviation enterprises are imported from abroad. The imported agricultural and forestry spraying devices have key problems such as high prices, difficult maintenance, and long problem-solving cycles. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a special agricultural and forestry spraying device for helicopters to realize the control function of the agricultural and forestry spraying device.

[0004] The purpose of the utility model is realized as follows:

[0005] A special agricultural and forestry spraying device for helicopters includes a medicine box, a medicine pump assembly, and a spray bar assembly. The medicine pump assembly is respectively connected to the medicine box and the spray bar assembly. The medicine pump assembly includes a medicine pump and a control valve, and also includes an electric control system. The electric control system includes an electrical system, a main power relay, and a control handle. The electrical system is used to obtain direct current from the power supply on the helicopter and supply power to the medicine pump assembly through the power relay. The control handle is electrically connected to the main power relay and is used to control the on-off. The control handle is provided with a pump switch and a control switch. The pump switch is electrically connected to the medicine pump, and the control switch is electrically connected to the control valve.

[0006] Preferably, the main power relay includes a circuit breaker and a relay control unit. The circuit breaker is electrically connected to the relay control unit, and the control handle is electrically connected to the relay control unit.

[0007] Preferably, a control box is provided on the medicine box, and the main power relay is installed in the control box; the control handle is fixed on the helicopter cyclic pitch control lever with a clamp.

[0008] Preferably, the electric control system further includes a speed control knob. The speed control knob is electrically connected to the medicine pump and is used to adjust the rotation speed of the medicine pump. The speed control knob is installed on the console.

[0009] Preferably, the medicine box is provided with a medicine adding port, a medicine outlet, and a reflux port. The medicine pump assembly further includes a medicine outlet pipe, an intermediate pipe, a reflux pipe, and a spraying pipe. The control valve is a three-way valve. The medicine outlet is sequentially connected to the medicine outlet pipe, the medicine pump, the intermediate pipe, and the inlet of the three-way valve. The two outlets of the three-way valve are respectively connected to the reflux pipe and the spraying pipe. The reflux pipe is connected to the reflux port. The medicine pump and the three-way valve are fixed on the medicine box. The spraying pipe is connected to the spray bar assembly through a filter.

[0010] Preferably, the medicine box is provided with an emergency release system, which includes an emergency release door and a push rod motor. The emergency release door is located on the lower surface of the medicine box. The push rod motor has a telescopic head. One end of the emergency release door is hinged to the lower surface of the medicine box through a quick-release pin, and the other end of the emergency release door is hinged to the telescopic head of the push rod motor. When the telescopic head of the push rod motor is in the extended state, the emergency release door is in the open state. The quick-release pin is connected to a push-pull steel cable, and the push-pull steel cable is used to pull out the quick-release pin to open the emergency release door.

[0011] Preferably, an emergency release hatch switch is also provided on the control handle, and the emergency release hatch switch is electrically connected to the push rod motor.

[0012] Due to the adoption of the above technical solutions, the utility model has the following beneficial effects:

[0013] 1. The domestic general aviation market is mainly concentrated in several aspects such as aerial photography, agricultural and forestry plant protection, police patrol, and rainfall geophysical exploration. Among them, the demand for aerial photography and agricultural and forestry plant protection is huge, accounting for about 80% of the entire general aviation operation market. Moreover, the market share of agricultural and forestry plant protection reaches 56% of the general aviation operation volume, and the overall market demand is huge.

[0014] 2. The agricultural spraying equipment fills the gap that domestic general aviation companies can only purchase imported STC agricultural spraying equipment from abroad. It provides faster, cheaper parts repair and replacement services than foreign manufacturers.

[0015] 3. The developed equipment is safe, reliable, green and environmentally friendly, and does not affect the safe flight of the aircraft;

[0016] 4. The structure is reasonable and the functions are complete; the installation and disassembly are simple, and the maintainability is good;

[0017] 5. It has the function of relieving pressure of the nozzle; it is convenient to clean the medicine box; the flow rate and pressure control are accurate; it is light in weight and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the utility model;

[0019] Figure 2 is a schematic diagram of the medicine box;

[0020] Figure 3 is a schematic diagram of the electric control system;

[0021] Figure 4 is a schematic diagram of the medicine pump assembly;

[0022] Figure 5 is a schematic diagram of the emergency release system. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following further describes the present utility model in conjunction with the attached drawings. In the drawings, 1 is a medicine box, 2 is a medicine pump assembly, 3 is a spray bar assembly, 4 is an electric control system, 5 is a medicine pump, 6 is a control valve, 7 is a control handle, 8 is a control box, 9 is a joystick, 22 is a medicine loading port, 23 is a liquid level gauge, 24 is a push rod motor, 25 is an emergency release door, 26 is a quick-release pin, and 27 is a push-pull cable.

[0024] See Figures 1-5 , a special agricultural and forestry spraying device for helicopters, including a medicine box, a medicine pump assembly, and a spray bar assembly. The medicine pump assembly is respectively connected to the medicine box and the spray bar assembly. The medicine pump assembly includes a medicine pump and a control valve, and also includes an electric control system. The electric control system includes an electrical system, a main power relay, and a control handle. The electrical system is used to draw direct current from the power supply on the helicopter and supply power to the medicine pump assembly through the power relay. The control handle is electrically connected to the main power relay, and the control handle is used to control the power on and off. The control handle is provided with a pump switch and a control switch. The pump switch is electrically connected to the medicine pump, and the control switch is electrically connected to the control valve.

[0025] The main power relay includes a circuit breaker and a relay control unit. The circuit breaker is electrically connected to the relay control unit, and the control handle is electrically connected to the relay control unit. A control box is provided on the medicine box, and the main power relay is installed in the control box; the control handle is fixed to the helicopter cyclic pitch control lever with a clamp. The electric control system also includes a speed control knob, and the speed control knob is electrically connected to the medicine pump. The speed control knob is used to adjust the rotation speed of the medicine pump, and the speed control knob is installed on the central console.

[0026] The medicine box is provided with a medicine loading port, a medicine outlet, and a return port. The medicine pump assembly further includes a medicine outlet pipe, an intermediate pipe, a return pipe, and a spraying pipe. The control valve is a three-way valve. The medicine outlet is sequentially connected to the medicine outlet pipe, the medicine pump, the intermediate pipe, and the inlet of the three-way valve. The two outlets of the three-way valve are respectively connected to the return pipe and the spraying pipe. The return pipe is connected to the return port. The medicine pump and the three-way valve are fixed on the medicine box, and the spraying pipe is connected to the spray bar assembly through a filter.

[0027] The medicine box is provided with an emergency release system. The emergency release system includes an emergency release door and a push rod motor. The emergency release door is located on the lower surface of the medicine box. The push rod motor has a telescopic head. One end of the emergency release door is hinged to the lower surface of the medicine box through a quick-release pin, and the other end of the emergency release door is hinged to the telescopic head of the push rod motor. When the telescopic head of the push rod motor is in the extended state, the emergency release door is in the open state. The quick-release pin is connected to a push-pull cable, and the push-pull cable is used to pull out the quick-release pin to open the emergency release door. The control handle is also provided with an emergency release door cover switch, and the emergency release door cover switch is electrically connected to the push rod motor.

[0028] Specifically:

[0029] The overall structural form of the present utility model is asFigure 1 As shown in the figure. Its structural features are as follows:

[0030] The equipment is installed under the BELL407 helicopter and is connected to the helicopter landing gear cross beam and the cargo hook suspension point through the hoop and pin on the equipment (medicine box). If there is no pre-buried cargo hook suspension point in the aircraft configuration, a new suspension point (with a strength greater than or equal to the original aircraft cargo hook suspension point) needs to be pre-buried at this position before installation.

[0031] The medicine boxes are symmetrically arranged relative to the aircraft; the medicine pump is installed at the front of the medicine box; the control valve is set at the front of the medicine box.

[0032] The spray boom assembly extends outside the aircraft fuselage and is symmetrically distributed; the spray boom and the nozzle are connected by threads; the spray boom is fixed to the medicine box through brackets and tie rods.

[0033] The overall shape of the medicine box is a cuboid (with an effective volume of 900L). The lower shell of the medicine box is integrally formed by a combined mold, and then a cover plate is added for secondary adhesive bonding and curing, which has the advantages of good load-bearing effect, light weight, and simple assembly. The medicine box is suspended on the helicopter cargo hook suspension point and the front and rear cross beams of the landing gear. There is a medicine injection hole on each side of the middle and rear parts of the medicine box, and the front end is connected to a support truss for fixing the spray boom. The rear part of the medicine box is connected to an emergency spraying mechanism for spraying pesticides in case of emergency, such as Figure 2 As shown in the figure.

[0034] According to the functional requirements of the agricultural and forestry spraying equipment, the emergency spraying mechanism adopts an electronic emergency spraying system and a mechanical emergency spraying system.

[0035] Electronic emergency spraying system: There are two emergency release doors on the lower surface of the medicine box, which can be controlled to open in case of emergency through a push rod motor, so that the pesticide leaks out of the medicine box. After the motor resets, the emergency release door closes again.

[0036] Mechanical emergency spraying system: A quick-release pin is provided at the fixed point at one end of the emergency release door. When the electronic emergency spraying system fails, the pilot can pull out the quick-release pin by pushing and pulling the steel cable, so that the emergency release door opens and the emergency spraying is completed.

[0037] Since the installation work is to install equipment and cables on the original aircraft, the cable layout basically follows the original aircraft cable routing path, and the bundling and fixing of the cables should follow the original aircraft assembly process and be fixed according to the position and form of the original aircraft cable fixation.

[0038] The power supply of the equipment is led out from the pins of the power system unit and connected to an aviation socket.

[0039] The control handle is fixed to the helicopter collective pitch control stick with a clamp. The cable is laid along the control stick and the floor, passes under the floor, and finally connects to an aviation plug fixed on the landing light panel. The circuit breaker of the control cable is routed along the nose of the aircraft and installed on the circuit breaker panel at the top of the cockpit. The speed control knob is installed near the pilot's collective pitch lever on the center console using Velcro, providing the pilot with the function of adjusting the flow rate and pressure of the system.

[0040] The spray boom assembly consists of a middle spray boom, left and right spray booms, a pull rod assembly, and a mounting bracket. The left and right spray booms are connected to the middle spray boom and fixed through the pull rod assembly and the mounting bracket. The nozzle consists of a nozzle seat, a filter screen, and a nozzle.

[0041] Connection of the agricultural and forestry spraying equipment components:

[0042] 1) Installation at the hanging ear of the main rib of the medicine tank: The hanging ear of the left main rib of the medicine tank is connected to the hanging point of the left cargo hook of the helicopter through an intermediate quick-release pin and a bushing (if there is already a bushing on the helicopter, there is no need to install a bushing again, the same below); the hanging ear of the right main rib is connected to the hanging point of the left cargo hook of the helicopter through an intermediate quick-release pin and a bushing.

[0043] 2) Installation at the rear end of the medicine tank: The rear beam connecting ear is connected to the rear hoop of the landing gear through symmetrically arranged quick-release pins on the left and right.

[0044] 3) Installation at the front end of the medicine tank: The pull rod of the front bracket of the medicine tank is connected to the front hoop of the landing gear through symmetrically arranged quick-release pins on the left and right, and the pull rod of the bracket is in a tensioned state after the medicine liquid is added.

[0045] 4) Installation of manual release: Put the ball head at the end of the cargo hook cable into the slot of the mechanical release cable end, and install the anti-loosening bolt group to complete the fixation.

[0046] 5) Installation of the central spray boom and the medicine tank: Fix the central spray boom assembly to the medicine tank bracket through eight groups of bolts; connect the spray boom bracket at the front of the medicine tank, the central spray boom assembly, and the jacking point connecting seat through quick-release pins with side pull rods (2 on each side, left and right); connect the pipeline system to the left snap joint of the central spray boom through a cam lock.

[0047] 6) Installation of the left and right spray boom assemblies and the central spray boom: Connect the left and right spray boom assemblies to the central spray boom through a cam lock, and use cable ties to lock the ears on both sides of the cam lock.

[0048] 7) Installation of the long inclined pull rod: Connect the left and right spray booms to the hanging point of the long inclined pull rod with a quick-release pin, and tighten the inclined strut;

[0049] 8) Installation of the stabilizing pull rod: Connect the stabilizing pull rod to the inclined strut and the left and right spray booms with a quick-release pin, and tighten the stabilizing pull rod.

[0050] Equipment Maintenance:

[0051] 1) The agricultural spraying equipment should be kept clean and regularly cleaned. Especially when the sprayed liquid medicine is relatively thick, the inner cavity and shaft seal of the medicine pump (the medicine pump needs to be disassembled) must be regularly cleaned according to the actual situation to avoid burning out the speed control circuit board or motor of the medicine pump due to the solidification of the liquid medicine blocking the medicine pump.

[0052] 2) The medicine tank is designed with a detachable inspection port cover, through which the inside of the medicine tank can be inspected and maintained.

[0053] 3) If the anodic oxidation on the surface of the aluminum alloy parts is damaged, it needs to be treated with aviation primer or equivalent primer.

[0054] 4) Remove the rubber gasket of the emergency spraying port cover as needed, remove all residues and sealants near the spraying port, and regularly apply grease to the quick-release pins of the spraying port cover.

[0055] 5) Apply sealant to the emergency spraying port cover plate and replace the rubber gasket.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A special agricultural and forestry spraying equipment for helicopters, comprising a medicine box, a medicine pump assembly, and a spray rod assembly, wherein the medicine pump assembly is connected to the medicine box and the spray rod assembly respectively, and the medicine pump assembly comprises a medicine pump and a control valve, and is characterized in that: It also includes an electronic control system, which includes an electrical system, a main power relay, and a control handle. The electrical system is used to take direct current from the power supply on the helicopter and power the medicine pump assembly through the power relay. The control handle is electrically connected to the main power relay. The control handle is used to control the on and off of the power. A pump switch and a control switch are provided on the control handle. The pump switch is electrically connected to the medicine pump, and the control switch is electrically connected to the control valve.

2. The special agricultural and forestry spraying equipment for helicopter according to claim 1, characterized in that: The main power supply relay comprises a circuit breaker and a relay control unit. The circuit breaker is electrically connected to the relay control unit, and the control handle is electrically connected to the relay control unit.

3. The special agricultural and forestry spraying equipment for helicopter according to claim 2, characterized in that: A control box is provided on the medicine box, and a main power supply relay is installed in the control box; the control handle is fixed on the helicopter's cyclic pitch control lever with a clamp.

4. The special agricultural and forestry spraying equipment for helicopter according to claim 1, characterized in that: The electronic control system also includes a speed regulating knob, which is electrically connected to the medicine pump and is used to adjust the speed of the medicine pump. The speed regulating knob is installed on the center console.

5. The special agricultural and forestry spraying equipment for helicopter according to claim 1, characterized in that: The medicine box is provided with a drug adding port, a drug outlet, and a reflux port. The drug pump assembly also includes a drug outlet pipe, an intermediate pipe, a reflux pipe, and a spraying pipe. The control valve is a three-way valve. The drug outlet is sequentially connected to the drug outlet pipe, the drug pump, the intermediate pipe, and the inlet of the three-way valve. The two outlets of the three-way valve are respectively connected to the reflux pipe and the spraying pipe. The reflux pipe is connected to the reflux port. The drug pump and the three-way valve are fixed on the medicine box. The spraying pipe is connected to the spray rod assembly through a filter.

6. The special agricultural and forestry spraying equipment for helicopter according to claim 1, characterized in that: The medicine box is provided with an emergency throwing system, which includes an emergency throwing door and a push rod motor. The emergency throwing door is located on the lower surface of the medicine box, the push rod motor has a telescopic head, one end of the emergency throwing door is hinged to the lower surface of the medicine box by a quick-release pin, and the other end of the emergency throwing door is hinged to the telescopic head of the push rod motor. When the telescopic head of the push rod motor is in an extended state, the emergency throwing door is in an open state, the quick-release pin is connected to a push-pull steel cable, and the push-pull steel cable is used to pull out the quick-release pin to open the emergency throwing door.

7. The special agricultural and forestry spraying equipment for helicopter according to claim 6, characterized in that: An emergency jettisoning port cover switch is also provided on the control handle, and the emergency jettisoning port cover switch is electrically connected to the push rod motor.

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