阅读说明：本技术 一种温度可控的热空气刀 (Temperature-controllable hot air knife ) 是由 吴湘 魏莉 于 2021-06-28 设计创作，主要内容包括：本发明属于航天设备技术领域,具体涉及一种温度可控的热空气刀,刀体由风刀外包板、左端盖和右端盖组装而成,包括下腔体、中腔体和上腔体,下腔体和中腔体之间的右端盖内侧开有气流导向弧槽,中腔体和上腔体之间的隔板上开有气流导向长孔；所述下腔体内布设有加热电阻丝,加热电阻丝固定在腔壁的陶瓷管上,下腔体的两侧设有耐高温电缆接头,耐高温电缆接头内安装有加热电阻丝线缆接头,下腔体的一侧设有热风刀进气管接头；所述上腔体的上端面安装有风刀片,风刀片上开有出风口。压缩空气在下腔体中被大功率加热电阻丝快速加热后,由分级设计的气流导向结构把气流引导出来,气流最终流出时就会形成一条有一定气压一定温度的的均匀风线。(The invention belongs to the technical field of space equipment, and particularly relates to a temperature-controllable hot air knife, wherein a knife body is formed by assembling an air knife outer wrapping plate, a left end cover and a right end cover and comprises a lower cavity, a middle cavity and an upper cavity, an air flow guide arc groove is formed in the inner side of the right end cover between the lower cavity and the middle cavity, and an air flow guide long hole is formed in a partition plate between the middle cavity and the upper cavity; a heating resistance wire is arranged in the lower cavity and fixed on a ceramic tube on the wall of the cavity, high-temperature-resistant cable joints are arranged on two sides of the lower cavity, cable joints of the heating resistance wire are arranged in the high-temperature-resistant cable joints, and a hot air knife air inlet pipe joint is arranged on one side of the lower cavity; and the upper end surface of the upper cavity is provided with an air blade, and an air outlet is formed in the air blade. After the compressed air is rapidly heated by the high-power heating resistance wire in the lower cavity, the airflow is guided out by the airflow guide structure which is designed in a grading way, and an even air wire with certain air pressure and certain temperature is formed when the airflow finally flows out.)

1. A temperature-controllable hot air knife, characterized in that: the hot air knife body is formed by assembling an air knife outer wrapping plate (5), a left end cover (401) and a right end cover (402), the knife body comprises a lower cavity (101), a middle cavity (201) and an upper cavity (301), the inner side of the right end cover (402) between the lower cavity (101) and the middle cavity (201) is provided with an air flow guide arc groove, and a partition plate between the middle cavity (201) and the upper cavity (301) is provided with an air flow guide long hole; a heating resistance wire (102) is arranged in the lower cavity (101), the heating resistance wire (102) is fixed on a ceramic tube (104) on the wall of the cavity, high-temperature-resistant cable joints (103) are arranged on two sides of the lower cavity (101), a heating resistance wire cable joint (3) is arranged in each high-temperature-resistant cable joint (103), and a hot air knife air inlet pipe joint (1) is arranged on one side of the lower cavity (101); the upper end face of the upper cavity (301) is provided with an air blade (2), and the air blade (2) is provided with an air outlet.

2. A temperature-controllable hot air knife as claimed in claim 1, wherein: be equipped with on wind blade (2) and be used for adjusting fore-and-aft regulation mounting hole (21) and control mounting hole (22) of air knife, fore-and-aft regulation mounting hole (21) and control mounting hole (22) and adjust through air knife adjusting device (4), air knife adjusting device (4) are installed on the chamber wall of last cavity (301), air knife adjusting device (4) are including temperature thermocouple (41), air knife clearance adjustment spare (42) and air knife clearance adjustment screw (43), temperature thermocouple (41) and air knife clearance adjustment screw (43) are installed on air knife clearance adjustment spare (42).

3. A temperature-controllable hot air knife as claimed in claim 2, wherein: the number of the air knife adjusting devices (4) is 6.

4. A temperature-controllable hot air knife according to any of claims 1-3, characterized in that: and polytetrafluoroethylene plates (403) are arranged on the inner sides of the left end cover (401) and the right end cover (402).

5. A temperature-controllable hot air knife according to any of claims 1-3, characterized in that: the lower cavity (101), the middle cavity (201) and the upper cavity (301) as well as the cavity and the air knife outer wrapping plate (5) are insulated by filling heat insulation ceramic fibers (105).

6. A temperature-controllable hot air knife according to any of claims 1-3, characterized in that: the joint of the upper cavity (301) and the air blade (2) is sealed through a silica gel pad.

7. A temperature-controllable hot air knife according to any of claims 1-3, characterized in that: the width of an air outlet formed in the air blade (2) is 0.4 mm.

Technical Field

The invention belongs to the technical field of aerospace equipment, and particularly relates to a temperature-controllable hot air knife.

Background

At present, all use the small-size marginal instrument of hair-dryer and similar hair-dryer to handle the equipment of air heating, because the air output and the wind-warm syndrome of hair-dryer all have very big limitation, in addition the hair-dryer area of blowing is little, can't satisfy the production demand in the enterprise at all. Therefore, it is necessary to design a large-sized temperature-controlled hot air knife structure.

Disclosure of Invention

The invention aims to provide a heating-controllable hot air knife which mainly comprises a lower cavity, a middle cavity and an upper cavity, wherein compressed air is quickly heated by a high-power heating resistance wire in the lower cavity, airflow is guided out by an airflow guide structure in a grading design, and an even air line with certain air pressure and certain temperature is formed when the airflow finally flows out. The hot air knife is mainly applied to the fields of aerospace, aviation and the like, and can also be applied to equipment for processing adhesive films or thin objects similar to the adhesive films and needing to be blown by hot air.

The technical scheme adopted by the invention is as follows: a temperature-controllable hot air knife is characterized in that a knife body of the hot air knife is formed by assembling an air knife outer wrapping plate, a left end cover and a right end cover, the knife body comprises a lower cavity, a middle cavity and an upper cavity, an air flow guide arc groove is formed in the inner side of the right end cover between the lower cavity and the middle cavity, and an air flow guide long hole is formed in a partition plate between the middle cavity and the upper cavity; a heating resistance wire is arranged in the lower cavity and fixed on a ceramic tube on the wall of the cavity, high-temperature-resistant cable joints are arranged on two sides of the lower cavity, cable joints of the heating resistance wire are arranged in the high-temperature-resistant cable joints, and a hot air knife air inlet pipe joint is arranged on one side of the lower cavity; and the upper end surface of the upper cavity is provided with an air blade, and an air outlet is formed in the air blade.

Furthermore, the air knife blade is provided with a front-back adjusting mounting hole and a left-right adjusting mounting hole which are used for adjusting the air knife, the front-back adjusting mounting hole and the left-right adjusting mounting hole are adjusted through an air knife adjusting device, the air knife adjusting device is installed on the wall of the upper cavity body and comprises a temperature measuring thermocouple, an air knife clearance adjusting piece and an air knife clearance adjusting screw, and the temperature measuring thermocouple and the air knife clearance adjusting screw are installed on the air knife clearance adjusting piece.

Further, the number of the air knife adjusting devices is 6.

Furthermore, the three layers of cavities are connected by a left end cover and a right end cover, and the end covers and the cavities are insulated by a high-temperature-resistant polytetrafluoroethylene plate. Thermal insulation ceramic fibers are filled between the cavity and the outer wrapping plate, so that heat exchange between internal heating air and external environment temperature can be effectively reduced, and an effective heat preservation effect is achieved.

Furthermore, the whole hot air knife structure can be divided into three layers, the lower cavity of the lowest layer is a compressed air heating layer, the heating resistance wire component is arranged in the lower cavity, the heating resistance wire and an external cable are connected by a specific high-temperature-resistant cable joint in a quick and fixed mode, and the whole heating wire is arranged in a specially-made ceramic tube for fixing. The hot-air after the heating leans on the air current direction arc groove of right-hand member lid design to get into the second floor smoothly, the second floor is well cavity, its effect is the air current switching-over transition layer, well cavity upper surface design has the air current direction slot hole, the air current is changed into vertical direction and gets into the cavity smoothly by the horizontal direction in the lumen, the wind blade is installed at last cavity upper surface, go up and carry out sealing process with the silica gel pad between cavity and the wind blade, compressed air comes out from the wind blade clearance after last cavity direction, form the even wind line air current that has certain wind sword together.

Furthermore, the hot air knife mainly comprises a lower cavity, a middle cavity and an upper cavity, compressed air is rapidly heated in the lower cavity by a high-power heating resistance wire, when air flows through the other end of the hot air knife, the air flows through the middle cavity and the upper cavity under the guidance of an air flow guide arc groove, hot air flows are reversed in the middle cavity and flows in the up-and-down direction from the front-and-back direction when entering, a stainless steel plate with the thickness of 3mm is installed on the upper panel of the upper cavity, an air flow guide notch with the width of 0.4mm is cut out by laser in the middle of the stainless steel plate, and a uniform air line with certain air pressure and certain temperature is formed when the air flows finally flow flows out; the technology solves the problems that the air is uniformly discharged from a gap with the width of 0.4mm and the temperature is controllable in the length direction of 2.5 meters.

The invention has the beneficial effects that: the hot air knife mainly comprises a lower cavity, a middle cavity and an upper cavity, compressed air is rapidly heated by a high-power heating resistance wire in the lower cavity, airflow is guided out by an airflow guide structure in a graded design, and an even air line with certain air pressure and certain temperature is formed when the airflow finally flows out. The hot air knife is mainly applied to the fields of aerospace, aviation and the like, and can also be applied to equipment for processing adhesive films or thin objects similar to the adhesive films and needing to be blown by hot air. In addition, temperature measuring sensor thermocouples are uniformly distributed at the airflow outlet and form a set of complete closed-loop temperature control system with the heating resistance wires, so that the temperature of the compressed air is effectively regulated and controlled.

Description of the drawings:

FIG. 1 is a schematic cross-sectional view of the first embodiment;

FIG. 2 is a schematic top view of the first embodiment;

FIG. 3 is a schematic perspective view of the first embodiment;

fig. 4 is a partial enlarged view of I in fig. 3.

The specific implementation mode is as follows:

example one

Referring to the figures, the cutter body of the hot air cutter is formed by assembling an air cutter outer wrapping plate 5, a left end cover 401 and a right end cover 402, and comprises a lower cavity 101, a middle cavity 201 and an upper cavity 301, wherein an air flow guide arc groove is formed in the inner side of the right end cover 402 between the lower cavity 101 and the middle cavity 201, and an air flow guide long hole is formed in a partition plate between the middle cavity 201 and the upper cavity 301; a heating resistance wire 102 is arranged in the lower cavity 101, the heating resistance wire 102 is fixed on a ceramic tube 104 on the wall of the cavity, high-temperature-resistant cable joints 103 are arranged on two sides of the lower cavity 101, a heating resistance wire cable joint 3 is arranged in the high-temperature-resistant cable joints 103, and a hot air knife air inlet pipe joint 1 is arranged on one side of the lower cavity 101; the upper end surface of the upper cavity 301 is provided with an air blade 2, and the air blade 2 is provided with an air outlet; the inner sides of the left end cover 401 and the right end cover 402 are provided with polytetrafluoroethylene plates 403; the lower cavity 101, the middle cavity 201 and the upper cavity 301 as well as the cavity and the air knife outer wrapping plate 5 are insulated by filling heat insulation ceramic fibers 105; the joint of the upper cavity 301 and the air blade 2 is sealed by a silica gel pad.

The air knife blade 2 is provided with a front-back adjusting mounting hole 21 and a left-right adjusting mounting hole 22 for adjusting an air knife, the front-back adjusting mounting hole 21 and the left-right adjusting mounting hole 22 are adjusted through an air knife adjusting device 4, the air knife adjusting device 4 is mounted on the wall of the upper cavity 301, the air knife adjusting device 4 comprises a temperature thermocouple 41, an air knife clearance adjusting piece 42 and an air knife clearance adjusting screw 43, and the temperature thermocouple 41 and the air knife clearance adjusting screw 43 are mounted on the air knife clearance adjusting piece 42; the number of the air knife adjusting devices 4 is 6.

The total length of the hot air knife is 2.7 meters, and the effective length of the gap between the air knife blades is 2.5 meters. In order to ensure the uniformity of the air outlet gap with the length direction of 2.5 meters and the width of 0.4mm, the mounting holes of the air blades are designed into a form that the left and the right as well as the front and the back can be adjusted. The mounting hole is adjusted left and right to enable the air blade to be fine-tuned left and right and fixed in the front and back directions; the mounting hole is adjusted to the front and back of the air blade, so that the air blade can be finely adjusted in the front and back direction and fixed in the left and right direction. The wind blade clearance adjusting module is fixed on the upper cavity through screws, and 6 wind blade clearance adjusting modules are uniformly arranged on the hot air knife body, and the wind blade clearance adjusting piece is designed to have dual functions, is used for installing a temperature measuring thermocouple and is used for installing the wind blade clearance adjusting screws, so that the clearance width of the wind blades can be adjusted and strictly controlled as required.

The hot air knife mainly comprises four modules, namely a heating module, a cavity structure module, a heat preservation module and a temperature control measurement and feedback system.

The heating module is mainly used for realizing rapid heating of compressed air by a high-power resistance heating wire, the heating resistance wire is arranged in the ceramic tube, so that the heating resistance wire can keep safe and edge-bonding effects with the outside when being heated, meanwhile, the ceramic tube is made of environment-friendly materials, peculiar smell cannot exist when high-temperature heating is carried out, cable fixing joints are designed at two ends of a main cavity of the hot air knife, and the safety and reliability of cables can be ensured.

The cavity mechanical cavity structure module comprises a lower cavity, a middle cavity, an upper cavity, a left end cover, a polytetrafluoroethylene plate, a right end cover, a wind blade gap adjusting piece, a wind blade gap adjusting screw, a sealing silica gel pad and the like. The heating module core assembly heating resistance wire is installed in the lower cavity, after compressed air is rapidly heated in the lower cavity, the compressed air is guided by an air flow guide arc groove of the right end cover, the air flow smoothly enters the middle cavity, an air flow guide long hole is designed on the upper surface of the middle cavity, the air flow is reversed in the middle cavity, the air flow smoothly enters the upper cavity from the horizontal direction to the vertical direction, the air flow guide long hole is also designed on the upper surface of the upper cavity, meanwhile, the wind blade is installed on the upper surface of the upper cavity, a silica gel pad is used for sealing treatment between the upper cavity and the wind blade, the compressed air comes out from a wind blade gap after being guided in the upper cavity, and finally, an even wind line air flow with certain wind pressure and certain temperature is formed.

The heat preservation module mainly comprises heat insulation ceramic fibers and an outer heat preservation plate, wherein the heat insulation ceramic fibers with certain thickness are filled between the cavities and the outer packing plate, so that the heat exchange between the internal heating air and the external environment temperature is effectively reduced. The temperature control measurement and feedback system mainly comprises a temperature thermocouple, the temperature thermocouple is arranged in the upper wall cavity and is close to the air outlet of the hot air knife, the air outlet temperature of the hot air knife is tested more truly and effectively, the temperature thermocouple and the heating wire form a closed loop system, the temperature measured by the thermocouple can be fed back to the control system in real time, the control system can adjust the heating power of the heating wire according to the fed-back temperature, and the effective control of the temperature is further realized.