Agricultural and forestry spraying equipment for BELL407 type helicopter

Abstract

The utility model discloses agriculture and forestry spraying equipment for a BELL407 type helicopter, which comprises an emergency jettisoning system with two control modes and is safer and more reliable. The agriculture and forestry spraying equipment for the BELL407 type helicopter comprises a pesticide box, the pesticide box is provided with an emergency jettisoning system, the emergency jettisoning system comprises an emergency jettisoning door and a push rod motor, the emergency jettisoning door and the push rod motor are located on the two adjacent wall faces of the pesticide box, the emergency jettisoning door is located on the lower surface of the pesticide box, and the push rod motor is provided with a telescopic head; one end of the emergency throwing door is hinged to the lower surface of the pesticide box through a quick-release bolt, the other end of the emergency throwing door is hinged to a telescopic head of a push rod motor, when the telescopic head of the push rod motor is in an extension state, the emergency throwing door is in an open state, and the quick-release bolt is connected with a push-pull device through a push-pull steel cable. The push-and-pull device is used for pulling out the quick-release bolt through the push-and-pull steel cable, so that the emergency throwing door is opened.

Description

Technical Field

[0001] The utility model relates to the technical field of helicopters, in particular to agricultural and forestry spraying equipment used for a BELL407 helicopter. Background Art

[0002] The BELL407 helicopter is a single-engine, single-rotor, light multi-purpose helicopter that can be modified according to different mission requirements and is widely used in many fields, including official duties, medical rescue, disaster relief, marine operations, helicopter flight training, armed reconnaissance, etc. Among them, the agricultural and forestry plant protection market share has reached 56% of the domestic general aviation operations, and the market demand is huge, which requires agricultural spraying equipment corresponding to the model structure.

[0003] Existing problems;

[0004] 1. Pesticides are highly corrosive and agricultural spraying equipment is easily worn out.

[0005] 2. The agricultural spraying equipment of domestic general aviation companies is often imported from abroad and is expensive. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an agricultural and forestry spraying device for a BELL407 helicopter, which includes an emergency release system with two control modes and is safer and more reliable.

[0007] The purpose of the utility model is achieved in this way:

[0008] A kind of agricultural and forestry spraying equipment for BELL407 helicopter comprises a medicine box, wherein the medicine box is provided with an emergency jettisoning system, the emergency jettisoning system comprises an emergency jettisoning door and a push rod motor, the emergency jettisoning door and the push rod motor are located on two adjacent walls of the medicine box, the emergency jettisoning door is located on the lower surface of the medicine box, the push rod motor has a telescopic head, one end of the emergency jettisoning door is hinged to the lower surface of the medicine box through a quick release latch, and the other end of the emergency jettisoning 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 jettisoning door is in an open state, the quick release latch is connected to a push-pull device through a push-pull steel cable, and the push-pull device is used to pull out the quick release latch through the push-pull steel cable to open the emergency jettisoning door.

[0009] Preferably, a hinged joint is fixed to one end of the emergency jettisoning door in a vertical direction, and the hinged joint is hinged to the telescopic head of the push rod motor.

[0010] Preferably, the push-pull steel cable has a sleeve, and the sleeve of the push-pull steel cable is fixed on the wall surface of the medicine box through a mounting seat.

[0011] Preferably, the upper surface of the medicine box is connected to the upper cover plate, a main rib hanging ear is provided in the middle of the upper cover plate, a clamp is provided at the edge of the upper cover plate, the main rib hanging ear is used to hang the cargo hook hanging point of the helicopter, and the clamp is used to be fixed on the skid landing gear of the helicopter.

[0012] Preferably, the medicine box is provided with a drug adding port, a drug outlet port, and a reflux port. The drug outlet port is connected to the drug outlet pipe, the drug pump, the intermediate pipe and the inlet of the three-way valve in sequence. The two outlets of the three-way valve are connected to the reflux pipe and the spraying pipe respectively. 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 spraying rod through a filter.

[0013] Preferably, the spray rod comprises a middle spray rod, a right spray rod and a left spray rod which are interconnected, and a plurality of spray heads are respectively arranged on the middle spray rod, the right spray rod and the left spray rod. The middle spray rod is fixed on a spray rod bracket, and the spray rod bracket is fixed on the medicine box.

[0014] Preferably, the middle spray rod is fixedly connected to the fuselage tie rod of the helicopter via a support rod.

[0015] Preferably, a pulley is provided at a corner of the lower surface of the medicine box.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The overall structure is simple, easy to maintain and cost-effective;

[0018] 2. Made of composite materials, it is corrosion-resistant, light in weight and has strong load-bearing capacity;

[0019] 3. The emergency release system includes two control methods, which is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the utility model;

[0021] Figure 2 Schematic diagram of the upper surface structure of the medicine box;

[0022] Figure 3 Schematic diagram of the lower surface structure of the medicine box;

[0023] Figure 4 Schematic diagram of the rear end structure of the medicine box;

[0024] Figure 5 Schematic diagram of the internal structure of the medicine box;

[0025] Figure 6 Spraying principle diagram of the utility model;

[0026] Figure 7 The stirring principle diagram of the utility model.

[0027] Reference numerals

[0028] In the attached figure, 1. medicine box, 2. medicine outlet pipe, 3. medicine pump, 4. filter, 5. middle pipe, 6. three-way valve, 7. return pipe, 8. spray pipe, 9. support rod, 10. middle spray rod, 11. left spray rod, 12. right spray rod, 13. nozzle, 14. fuselage pull rod, 15. spray rod bracket, 16. medicine box upper cover, 17. inspection cover, 18. medicine adding port, 19. pulley, 20. (landing gear) clamp, 21. main rib hanging ear, 22. medicine discharge port, 23. liquid level gauge, 24. push rod motor, 25. emergency jettisoning door, 26. quick release latch, 27. push-pull steel cable, 28. internal partition of medicine box. DETAILED DESCRIPTION

[0029] The utility model provides a device installed on a BELL407 helicopter to meet the needs of agricultural and forestry spraying, and meets the purposes of large-scale pesticide spraying, pesticide mixing, emergency spraying, etc. The device has a simple structure, corrosion resistance, light weight, strong bearing capacity, low cost, low difficulty in overhaul and maintenance, high safety, and the impact of pesticide consumption on the center of gravity of the BELL407 helicopter during operation is within a limited range.

[0030] See also Figure 1-Figure 7 , an agricultural and forestry spraying equipment for a BELL407 helicopter, comprising a medicine box 1, wherein the medicine box 1 is provided with an emergency jettisoning system, the emergency jettisoning system comprising an emergency jettisoning door 25 and a push rod motor 24, the emergency jettisoning door 25 and the push rod motor 24 are located on two adjacent walls of the medicine box 1, the emergency jettisoning door is located on the lower surface of the medicine box, the push rod motor 24 has a telescopic head, one end of the emergency jettisoning door 25 is hinged to the corresponding wall of the medicine box 1 through a quick-release latch 26, the other end of the emergency jettisoning door 25 is hinged to the telescopic head of the push rod motor 24, when the telescopic head of the push rod motor 24 is in an extended state, the emergency jettisoning door 25 is in an open state, the quick-release latch 26 is connected to a push-pull device through a push-pull steel cable 27, and the push-pull device is used to pull out the quick-release latch 26 through the push-pull steel cable 27 to open the emergency jettisoning door 25.

[0031] The quick release latch 26 is an existing structure. In this embodiment, a latch is extended by the elastic force of a compression spring. The tail end of the latch is connected to a steel cable 27. When the push-pull device is released, the quick release latch 26 can automatically reset. Of course, other elastically positioned latch structures or conventional latches that are manually reset can also be used. The push-pull device uses an electric push rod or a cylinder.

[0032] One end of the emergency jettisoning door 25 is fixed with a hinged joint in the vertical direction, and the hinged joint is hinged with the telescopic head of the push rod motor 24. The push-pull steel cable 27 has a sleeve, and the sleeve of the push-pull steel cable 27 is fixed to the wall surface of the medicine box 1 through a mounting seat. The upper surface of the medicine box 1 is connected to the upper cover plate 16, and a main rib hanging ear 21 is provided in the middle of the upper cover plate 16. A clamp 20 is provided at the edge of the upper cover plate 16. The main rib hanging ear 21 is used to hang the cargo hook hanging point of the helicopter, and the clamp 20 is used to be fixed on the skid landing gear of the helicopter. A pulley 19 is provided at the corner of the lower surface of the medicine box 1.

[0033] Specifically:

[0034] See also Figure 1-Figure 5 The medicine box 1 includes a medicine adding port, a medicine outlet, and a reflux port. The medicine outlet is connected to a medicine outlet pipe 2, a medicine pump 3, an intermediate pipe 5, and an inlet of a three-way valve 6 in sequence. Two outlets of the three-way valve 6 are connected to a reflux pipe 7 and a spray pipe 8 respectively. The reflux pipe 7 is connected to the reflux port, and the spray pipe 8 is connected to an intermediate spray rod 10. A filter 4 is installed between the spray pipe 8 and the intermediate spray rod 10. The spray rod includes an intermediate spray rod 10, a right spray rod 12, and a left spray rod 11 that are interconnected. A plurality of spray heads 13 are respectively provided on the intermediate spray rod 10, the right spray rod 12, and the left spray rod 11, and the spray heads 13 can be used for pressure relief.

[0035] The medicine box 1 is provided with an emergency jettisoning system at the rear end. In an emergency, the push rod motor 24 is turned on, and the driving motor 24 pushes the emergency jettisoning door 25 to quickly release all the liquid medicine to raise the aircraft altitude. When the electric emergency jettisoning device fails, the quick-release latch 26 can be removed by pushing and pulling the steel cable 27, and the liquid medicine can also be released. The medicine box 1 is connected to the upper cover plate 16. The medicine box 1 is provided with internal partitions 28 arranged in a criss-cross pattern to divide the space of the medicine box into multiple compartments. The internal partitions 28 are provided with flow holes to connect adjacent compartments. The medicine adding port, the medicine outlet, and the reflux port connect different compartments. The upper cover plate 16 is provided with multiple inspection port covers 17, which correspond to each compartment one by one. The upper cover plate 16, the internal partition plate 28, and the medicine box 1 are selected from glass fiber composite materials, and are respectively formed on the mold by vacuum introduction method. After that, the upper cover plate 16, the internal partition plate 28, and the medicine box 1 are glued and bonded into an integrated composite medicine box. The medicine box 1 has two trapezoidal arches on its belly, and the long sides are inverted at an angle of 50mm×45° to enhance the rigidity and structural stability of the box. The medicine box 1 is provided with a liquid level gauge 23 inside and outside that is connected to the inner cavity to display the liquid level. The inspection port cover 17, the main rib hanger 21, the spray rod bracket 15, the reflux port, the emergency jettisoning system, the medicine outlet, the liquid level gauge 23, the medicine adding port 18, and the medicine discharging port 22 are fixed to the one-piece composite medicine box by bolts and sealed by seals. The three-way valve 6 is fixed to the medicine box by bolts. The medicine outlet, medicine outlet pipe 2, and medicine pump 3 are connected by a quick-release pipe joint; the intermediate pipe 5, three-way valve 6, return pipe 7, and return port are connected by a clamp; the three-way valve 6, spray pipe 8, and filter 4 are connected by a clamp; the filter 4 and the intermediate spray rod 10 are connected by a quick-release pipe joint; the intermediate spray rod 10, the right spray rod 12, and the left spray rod 11 are connected by a quick-release pipe joint; the intermediate spray rod 10 is fixed to the spray rod bracket 15 by bolts, and supported and fixed by the support rod 9 and the fuselage pull rod 14; the nozzle 13 is manufactured integrally with the intermediate spray rod 10, the right spray rod 12, and the left spray rod 11; when the medicine box 1 is installed, it is connected to the cargo hook hanging point through two main rib hanging ears 21, and four clamps 20 are connected to the skid landing gear; when the medicine pump 3 is installed on the machine, it is fixed to the medicine box 1 by customized bracket bolts.

[0036] A BELL407 helicopter agricultural and forestry spraying method, see Figure 6-Figure 7 , by controlling the three-way valve 6 to switch between the two working conditions of stirring and spraying, in which, in the stirring working state, the liquid medicine is sucked out of the medicine box 1 by the medicine pump 3 through the medicine outlet pipe 2, flows through the middle pipe 5, the three-way valve 6, and the reflux pipe 7 to return to the medicine box 1 and impact the liquid medicine in the medicine box to complete the stirring work; in the spraying working state, the liquid medicine is sucked out of the medicine box by the medicine pump 3 through the medicine outlet pipe 2, flows through the middle pipe 5, the three-way valve 6, the spray pipe 8, the filter 4, and then enters the middle spray rod 10, the right spray rod 12 and the left spray rod 11, and the liquid medicine is sprayed from the nozzle 13.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model 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 utility model.

Claims

1. An agricultural and forestry spraying device for a BELL407 helicopter, comprising a medicine box, wherein the medicine box is provided with an emergency throwing system, characterized in that: The emergency throwing system 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 through 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 the push-pull device through a push-pull steel cable. The push-pull device is used to pull out the quick-release pin through the push-pull steel cable to open the emergency throwing door.

2. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 1, characterized in that: A hinged joint is fixed at one end of the emergency jettisoning door in a vertical direction, and the hinged joint is hinged to the telescopic head of the push rod motor.

3. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 1, characterized in that: The push-pull steel cable is provided with a sleeve, and the sleeve of the push-pull steel cable is fixed on the wall surface of the medicine box through a mounting seat.

4. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 1, characterized in that: The upper surface of the medicine box is connected to the upper cover plate. A main rib hanging ear is provided in the middle of the upper cover plate, and a clamp is provided at the edge of the upper cover plate. The main rib hanging ear is used to hang the cargo hook hanging point of the helicopter, and the clamp is used to fix it on the skid landing gear of the helicopter.

5. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 1, characterized in that: The medicine box is provided with a drug adding port, a drug outlet port, and a reflux port. The drug outlet port is connected to the drug outlet pipe, the drug pump, the intermediate pipe and the inlet of the three-way valve in sequence. The two outlets of the three-way valve are connected to the reflux pipe and the spraying pipe respectively. 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 spraying rod through a filter.

6. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 5, characterized in that: The spraying rod comprises a middle spray rod, a right spray rod and a left spray rod which are interconnected. A plurality of spray heads are respectively arranged on the middle spray rod, the right spray rod and the left spray rod. The middle spray rod is fixed on a spray rod bracket, and the spray rod bracket is fixed on a medicine box.

7. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 6, characterized in that: The middle spray rod is fixedly connected to the fuselage tie rod of the helicopter through a support rod.

8. The agricultural and forestry spraying equipment for a BELL407 helicopter according to claim 1, characterized in that: Pulleys are arranged at the corners of the lower surface of the medicine box.

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