Towing cone static pressure pipe winding and unwinding channel turning structure and towing cone system

Abstract

The present application belongs to the technical field of civil aircraft vertical tail integrated design, and discloses a drag cone static pressure pipe retraction passage turning structure and a drag cone system. The drag cone system static pressure pipe retraction passage adopts the drag cone static pressure pipe retraction passage turning structure to connect two straight pipe-shaped drag cone static pressure pipe retraction passages, and the included angle of the two centric axes of the guide grooves can be set according to the bending radius requirement of the static pressure pipe, thereby solving the problem that the current metal pipe bending forming process and tooling cannot meet the bending radius requirement of the static pressure pipe on the drag cone system static pressure pipe retraction passage. The drag cone system connects the two adjacent drag cone static pressure pipe retraction passages through the drag cone static pressure pipe retraction passage turning structure, thereby solving the technical problem that the current metal pipe bending forming process and tooling cannot meet the bending radius requirement of the static pressure pipe on the static pressure pipe retraction module, and the assembly of the whole static pressure pipe retraction module is more convenient.

Description

Technical Field

[0001] This invention relates to the field of integrated design technology for vertical tail fins of civil aircraft, and in particular to a tow cone hydrostatic tube retraction and extension channel turning structure and tow cone system. Background Technology

[0002] During the flight testing phase of civil aircraft development, precise airspeed information is required for subjects such as airspeed calibration, stall speed, in-flight thrust determination, flutter, and RVSM (Reduced Vertical Minimum Separation). Precise airspeed is typically obtained using a tow cone system. A tow cone system generally consists of a cone, a static pressure hose (including a static pressure acquisition tube), pressure sensors and a data processing system, as well as a static pressure hose deployment / retraction system. The static pressure hose of the tow cone system extends from the passenger cabin or equipment bay through the vertical tail fin and exits the fuselage, towing the cone a certain distance behind the aircraft.

[0003] In related technologies, the static pressure pipe inside the machine body is laid within a channel. For retractable tow cones, the static pressure pipe also needs to slide within the channel to allow the cone to be extended or retracted. Due to space limitations, the static pressure pipe and its extension / retraction channel within the machine body are generally multi-segmented zigzags. The static pressure pipe channel inside the machine body is usually made of bent metal pipe with flared ends, and is fixed to the machine body structure by connecting brackets or supports welded to the metal pipe.

[0004] However, the bending and forming process of metal tubes is complex. Currently available forming processes and tooling cannot meet the bending radius requirements of the hydrostatic tube in the drag cone system. An excessively small bending radius can lead to poor retraction and excessive wear of the hydrostatic tube. Furthermore, fixing the metal tube is difficult, typically requiring welding of angle plates or brackets to connect it to the machine structure. This necessitates the use of easily formable and weldable stainless steel tubes to manufacture the hydrostatic tube channels, resulting in a heavier channel. Summary of the Invention

[0005] The purpose of this invention is to provide a conical tapered hydrostatic pipe winding channel turning structure and conical tapered system to solve the technical problems that the existing metal pipe bending forming process cannot meet the requirements of the hydrostatic pipe for the channel bending radius and the channel weight is large.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a turning structure for the take-up and undo channel of a drag cone static pressure pipe, comprising:

[0008] The guide has at least two guide slots connected in sequence. Each guide slot is a U-shaped slot and includes a bottom and a wall. The centroidal axes of the two interconnected guide slots are set at an angle and the connection between their bottoms is set as a smooth rounded corner. The guide slots at both ends of the guide can accommodate the cable conical static pressure pipe delivery and delivery channels.

[0009] A sealing element is detachably connected to the wall of each of the guide grooves, and the sealing element is configured to block the opening of the guide groove opposite to the bottom of the groove;

[0010] The pipe head clips are detachably connected to the groove walls of the guide grooves located at both ends of the guide member. The pipe head clips are configured to limit the opening and closing channels of the drag cone static pressure pipe.

[0011] A connector that is connected to the sealing member and can be connected to an external rack.

[0012] Optionally, the centroidal axes of the two interconnected guide grooves on the guide are set at an obtuse angle.

[0013] Optionally, the bottom diameter of the guide groove is equal to the inner diameter of the conical static pressure pipe take-up and drop channel. The bottom and wall of the guide groove located at both ends of the guide member are provided with receiving slots. The receiving slots extend at least to the end of the guide member, and the groove depth is equal to the wall thickness of the conical static pressure pipe take-up and drop channel.

[0014] Optionally, the pipe head clamp includes a connecting part and a limiting part that are connected to each other. The connecting part is detachably connected to the groove wall of the guide groove. The limiting part is provided with an arc-shaped groove on the side facing the bottom of the guide groove. The diameter of the arc-shaped groove is equal to the outer diameter of the drag cone static pressure pipe take-up and release channel.

[0015] Optionally, each of the guide grooves has a mounting portion extending outward along the width direction of the guide groove on its groove wall. The sealing member is detachably connected to the mounting portion, and the tube head clip is detachably connected to the mounting portion of the guide groove located at both ends of the guide member.

[0016] Optionally, the sealing element is a rectangular cover plate, which is detachably connected to the mounting part by bolts.

[0017] Optionally, the connector is an L-shaped plate, including interconnected webs and flanges. The webs are detachably connected to the sealing member by bolts, and the flanges are detachably connected to the external frame by bolts.

[0018] Optionally, the guide is made of lightweight metal or composite material.

[0019] Secondly, the present invention also provides a drag cone system, comprising:

[0020] The control module includes a take-up and release unit, a pressure sensing unit, and a data processing unit, all of which are electrically connected to the control module.

[0021] A static pressure pipe take-up and release module, the static pressure pipe take-up and release module includes multiple drag cone static pressure pipe take-up and release channels and the aforementioned drag cone static pressure pipe take-up and release channel turning structure, the drag cone static pressure pipe take-up and release channel is a straight pipe, when the static pressure pipe take-up and release module needs to be bent, the drag cone static pressure pipe take-up and release channel turning structure connects two adjacent drag cone static pressure pipe take-up and release channels;

[0022] The test module includes a static pressure tube and a cone. One end of the static pressure tube passes through the static pressure tube retraction module and is electrically connected to the control module. The other end of the static pressure tube is connected to the cone.

[0023] Optionally, the inner opening at the end of the pull cone static pressure pipe take-up and drop channel is set to a smooth rounded corner or is deburred.

[0024] The beneficial effects of this invention are:

[0025] Firstly, this invention provides a turning structure for the take-up and unload channel of a tapered static pressure tube. When the take-up and unload channel of the tapered system needs to be turned within the machine body, the aforementioned turning structure connects two straight-tube-shaped take-up and unload channels, and the static pressure tube and cone are inserted into the take-up and unload channels and the turning structure. The included angle of the centroidal axes of the two interconnected guide grooves can be set according to the bending radius requirements of the static pressure tube, solving the technical problem that current mature metal tube bending and forming processes and tooling cannot meet the bending radius requirements of the static pressure tube for the take-up and unload channel of the tapered system, effectively reducing the manufacturing cost of the take-up and unload channel of the tapered system. Except for the turning structure, all other take-up and unload channels of the tapered system are designed as straight tubes, making the assembly of the entire tapered system's static pressure tube take-up and unload channel more convenient. The connection between the bottoms of the two interconnected guide slots is designed with smooth rounded corners, facilitating the loading and unloading of the static pressure tube and cone, and effectively preventing the static pressure tube and cone from getting stuck inside the turning structure of the drag cone static pressure tube loading and unloading channel. A sealing component blocks the openings opposite the bottoms of the guide slots, preventing the static pressure tube and cone from detaching from the turning structure of the drag cone static pressure tube loading and unloading channel during loading and unloading. A pipe head clamp limits the movement of the drag cone static pressure tube loading and unloading channel, improving the connection stability between the channel and its turning structure. The connector connects to the sealing component and can also be connected to the external frame. It achieves connection to the machine body structure without the need for welding corner plates or brackets; therefore, the drag cone static pressure tube loading and unloading channel can use lightweight metal pipe or non-metallic rigid pipe, reducing the overall weight of the channel.

[0026] Secondly, the present invention also provides a drag cone system, which connects two adjacent drag cone static pressure tube take-up and release channels by adopting a drag cone static pressure tube take-up and release channel turning structure. This solves the technical problem that the current mature metal tube bending and forming process and tooling cannot meet the requirements of the static pressure tube for the bending radius of the static pressure tube take-up and release module, effectively reducing the manufacturing cost of the static pressure tube take-up and release module and making the assembly of the entire static pressure tube take-up and release module more convenient. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the winding structure of the drag cone static pressure pipe take-up and release channel according to an embodiment of the present invention;

[0028] Figure 2 This is an exploded view of the turning structure of the drag cone static pressure pipe take-up and release channel described in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the turning structure of the drag cone static pressure pipe take-up and release channel and the connection relationship between the drag cone static pressure pipe take-up and release channel and the static pressure pipe according to the embodiment of the present invention;

[0030] Figure 4This is a cross-sectional view of the turning structure of the drag cone static pressure pipe take-up and release channel, the drag cone static pressure pipe take-up and release channel, and the static pressure pipe connection as described in the embodiment of the present invention.

[0031] Figure 5 yes Figure 4 Sectional view along AA;

[0032] Figure 6 yes Figure 4 Sectional view along BB;

[0033] Figure 7 This is a schematic diagram of the drag cone system described in an embodiment of the present invention.

[0034] In the picture:

[0035] 1. Guide component; 11. Guide groove; 111. Mounting part; 12. Socket; 2. Sealing component; 3. Pipe head clip; 31. Connecting part; 32. Limiting part; 4. Connecting component; 41. Web plate; 42. Flange; 100. Static pressure pipe take-up and drop channel; 200. Control module; 300. Static pressure pipe take-up and drop module; 400. Test module; 410. Static pressure pipe; 420. Cone. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] On the one hand, such as Figures 1 to 6 As shown, this invention provides a turning structure for a conical hydrostatic pipe take-up and drop channel, including a guide 1, a sealing member 2, a pipe head clamp 3, and a connector 4. The guide 1 has at least two guide grooves 11, which are sequentially connected. Each guide groove 11 is a U-shaped groove including a bottom and a wall. The centroidal axes of the two interconnected guide grooves 11 are set at an included angle, and the connection point at their bottoms is a smooth rounded corner. The conical hydrostatic pipe take-up and drop channel 100 can be placed in each of the guide grooves 11 at both ends of the guide 1. A sealing member 2 is detachably connected to the wall of each guide groove 11, configured to seal the opening of the guide groove 11 opposite to the bottom. A pipe head clamp 3 is detachably connected to the wall of each guide groove 11 at both ends of the guide 1, configured to limit the movement of the conical hydrostatic pipe take-up and drop channel 100. The connector 4 is connected to the sealing member 2 and can be connected to an external frame. Optionally, the number of guide grooves 11 of the guide member 1 can be set to two, three, four or more, depending on the turning requirements of the static pressure pipe take-up and undo channel of the drag cone system.

[0041] When the static pressure pipe take-up and unload channel of the towing cone system needs to bend within the machine body, the aforementioned towing cone static pressure pipe take-up and unload channel bending structure is used to connect the two straight-tube towing cone static pressure pipe take-up and unload channels 100. The static pressure pipe 410 and the cone 420 are then inserted into the towing cone static pressure pipe take-up and unload channel 100 and the towing cone static pressure pipe take-up and unload channel bending structure. The included angle of the centroidal axes of the two interconnected guide grooves 11 can be set according to the bending radius requirements of the static pressure pipe 410, solving the technical problem that the current mature metal pipe bending and forming process and tooling cannot meet the bending radius requirements of the static pressure pipe 410 for the towing cone system static pressure pipe take-up and unload channel, effectively reducing the manufacturing cost of the towing cone system static pressure pipe take-up and unload channel. Except for the towing cone static pressure pipe take-up and unload channel bending structure, all other towing cone static pressure pipe take-up and unload channels 100 of the towing cone system are designed as straight tubes, making the assembly of the entire towing cone system static pressure pipe take-up and unload channel more convenient. The connection point at the bottom of the two interconnected guide grooves 11 is designed with smooth rounded corners to facilitate the retraction and extension of the static pressure pipe 410 and the cone 420, effectively preventing the static pressure pipe 410 and the cone 420 from getting stuck inside the turning structure of the retraction and extension channel of the drag cone static pressure pipe. The sealing component 2 seals the opening opposite to the bottom of the guide groove 11 to prevent the static pressure pipe 410 and the cone 420 from coming out of the turning structure of the retraction and extension channel of the drag cone static pressure pipe during the retraction and extension process. The pipe head clamp 3 limits the drag cone static pressure pipe retraction and extension channel 100, improving the connection stability between the drag cone static pressure pipe retraction and extension channel 100 and the turning structure of the drag cone static pressure pipe retraction and extension channel. The connecting component 4 is connected to the sealing component 2 and can be connected to the external frame. It can achieve the connection with the machine body structure without welding corner plates or brackets. Therefore, the drag cone static pressure pipe retraction and extension channel 100 can be made of lightweight metal pipe or non-metal rigid pipe, reducing the overall weight of the static pressure pipe retraction and extension channel.

[0042] Specifically, the centroidal axes of the two interconnected guide grooves 11 on the guide member 1 are set at an obtuse angle. This allows the bending structure of the drag cone static pressure pipe take-up and release channel to form a larger bending radius when connecting the two drag cone static pressure pipe take-up and release channels 100, thus meeting the bending radius requirements of the static pressure pipe 410 for the drag cone system static pressure pipe take-up and release channel, and avoiding poor take-up and release and excessive wear of the static pressure pipe 410.

[0043] Optionally, such as Figures 4-6As shown, the bottom diameter of the guide groove 11 is equal to the inner diameter of the tapered static pressure pipe take-up and drop channel 100. Receiving slots 12 are provided on the bottom and walls of the guide groove 11 at both ends of the guide member 1. The receiving slots 12 extend at least to the ends of the guide member 1, and their depth is equal to the wall thickness of the tapered static pressure pipe take-up and drop channel 100. This structural design ensures a smooth transition between the bottom of the guide groove 11 and the inner wall of the tapered static pressure pipe take-up and drop channel 100 when the tapered static pressure pipe take-up and drop channel 100 is placed inside the guide groove 11, further preventing the static pressure pipe 410 and the cone 420 from getting stuck inside the static pressure pipe take-up and drop channel during take-up and drop-down. Furthermore, this structural design eliminates the need for flaring when machining the straight-tube tapered static pressure pipe take-up and drop channel 100, further simplifying the machining process.

[0044] For example, such as Figure 2 and Figure 6 As shown, the pipe head clamp 3 includes a connecting part 31 and a limiting part 32 that are interconnected. The connecting part 31 is detachably connected to the groove wall of the guide groove 11. The limiting part 32 has an arc-shaped groove on the side facing the bottom of the guide groove 11. The diameter of the arc-shaped groove is equal to the outer diameter of the tapered static pressure pipe take-up and release channel 100. The pipe head clamp 3 limits the tapered static pressure pipe take-up and release channel 100 above the bottom of the groove, which can effectively prevent the tapered static pressure pipe take-up and release channel 100 from moving along its own axial direction, and further improve the connection stability of the tapered static pressure pipe take-up and release channel 100 and the tapered static pressure pipe take-up and release channel turning structure.

[0045] Optionally, such as Figure 2 As shown, each guide groove 11 has a mounting portion 111 extending outward along the width direction of the guide groove 11 on its groove wall. The sealing member 2 is detachably connected to the mounting portion 111, and the pipe head clamp 3 is detachably connected to the mounting portions 111 of the guide groove 11 located at both ends of the guide member 1. By providing mounting portions 111 on the groove wall of the guide groove 11, it is convenient to detachably connect the sealing member 2 and the pipe head clamp 3 to the groove wall of the guide groove 11. Specifically, the sealing member 2 is detachably connected to the mounting portion 111 by bolts, and the pipe head clamp 3 is detachably connected to the mounting portion 111 by bolts.

[0046] Furthermore, the sealing element 2 is a rectangular cover plate, which is detachably connected to the mounting part 111 by bolts. The rectangular cover plate has a simple structure, is easy to manufacture, has low cost, and is easy to connect, thus providing a good sealing effect. For example, a rectangular cover plate can be detachably connected to the groove wall of each guide groove 11 of the guide element 1.

[0047] Optionally, such as Figure 3 and Figure 4As shown, the connector 4 is an L-shaped plate, including a web 41 and a flange 42 that are connected to each other. The web 41 is detachably connected to the sealing member 2 by bolts, and the flange 42 is detachably connected to the external frame by bolts. The L-shaped plate is an efficient connecting corner piece, with a simple structure and a clear force transmission path. By setting the connector 4, there is no need to design additional connection points for the guide member 1, simplifying the overall structure of the guide member 1.

[0048] For example, the guide 1 is made of lightweight metal or composite material. Specifically, the guide 1 can be made of easily machinable lightweight metal, such as aluminum alloy or zinc alloy, or of rigid composite material, such as carbon fiber reinforced composite material or glass fiber reinforced composite material. Both of these materials can reduce the weight of the turning structure of the static pressure pipe take-up and release channel of the tow cone system, thereby reducing the overall weight of the static pressure pipe take-up and release channel of the tow cone system.

[0049] On the other hand, such as Figure 6 As shown, the present invention also provides a towing cone system, including a control module 200, a static pressure tube retraction module 300, and a testing module 400. The control module 200 includes a retraction unit, a pressure sensing unit, and a data processing unit, all of which are electrically connected to the control module 200. The static pressure tube retraction module 300 includes multiple towing cone static pressure tube retraction channels 100 and the aforementioned towing cone static pressure tube retraction channel bending structure. The towing cone static pressure tube retraction channel 100 is a straight tube. When the static pressure tube retraction module 300 needs to be bent, adjacent towing cone static pressure tube retraction channels 100 are connected through the towing cone static pressure tube retraction channel bending structure. The testing module 400 includes a static pressure tube 410 and a cone 420. One end of the static pressure tube 410 passes through the static pressure tube retraction module 300 and is electrically connected to the control module 200, while the other end of the static pressure tube 410 is connected to the cone 420. The connection methods between the control module 200 and the test module 400 and the control module 200 are existing technologies and will not be described in detail here. The above-mentioned towing cone system connects two adjacent towing cone static pressure tube take-up and release channels 100 by adopting a turning structure of the towing cone static pressure tube take-up and release channel. This solves the technical problem that the current mature metal tube bending and forming process and tooling cannot meet the bending radius requirements of the static pressure tube 410 for the static pressure tube take-up and release module 300, effectively reducing the manufacturing cost of the static pressure tube take-up and release module 300 and making the assembly of the entire static pressure tube take-up and release module 300 more convenient.

[0050] Furthermore, the inner opening at the end of the tapered static pressure tube take-up and drop channel 100 is set as a smooth rounded corner or is deburred. The above structural design can further prevent the static pressure tube 410 and the cone 420 from getting stuck inside the static pressure tube take-up and drop module 300, and can also effectively prevent the tapered static pressure tube take-up and drop channel 100 from scratching the static pressure tube 410.

[0051] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A turning structure for the take-up and undo channel of a tapered hydrostatic pipe, characterized in that, include: The guide (1) has at least two guide grooves (11), which are connected in sequence. Each guide groove (11) is a U-shaped groove and includes a bottom and a wall. The centroidal axes of the two interconnected guide grooves (11) are set at an angle and the connection between the bottoms of the two grooves is set as a smooth rounded corner. The guide grooves (11) at both ends of the guide (1) can accommodate the cable conical static pressure pipe take-up and release channel (100). The sealing element (2) is detachably connected to the wall of each guide groove (11), and the sealing element (2) is configured to block the opening of the guide groove (11) opposite to the bottom of the groove; The pipe head clip (3) is detachably connected to the groove wall of the guide groove (11) at both ends of the guide (1), and the pipe head clip (3) is configured to limit the pull cone static pressure pipe take-up and release channel (100). Connector (4), which is connected to the sealing member (2) and can be connected to an external rack.

2. The turning structure of the conical hydrostatic pipe take-up and undo channel according to claim 1, characterized in that, The centroidal axes of the two interconnected guide grooves (11) on the guide (1) are set at an obtuse angle.

3. The turning structure of the conical hydrostatic pipe take-up and undo channel according to claim 1, characterized in that, The bottom diameter of the guide groove (11) is equal to the inner diameter of the traction cone static pressure pipe take-up and release channel (100). The bottom and the wall of the guide groove (11) located at both ends of the guide member (1) are provided with receiving slots (12). The receiving slots (12) extend at least to the end of the guide member (1), and the groove depth is equal to the wall thickness of the traction cone static pressure pipe take-up and release channel (100).

4. The turning structure of the conical hydrostatic pipe take-up and undo channel according to claim 3, characterized in that, The pipe head clip (3) includes a connecting part (31) and a limiting part (32) that are connected to each other. The connecting part (31) is detachably connected to the groove wall of the guide groove (11). The limiting part (32) has an arc-shaped groove on one side facing the bottom of the guide groove (11). The diameter of the arc-shaped groove is equal to the outer diameter of the drag cone static pressure pipe take-up and release channel (100).

5. The turning structure of the winding channel for the drag cone static pressure pipe according to claim 1, characterized in that, Each of the guide grooves (11) has an installation part (111) extending outward along the width direction of the guide groove (11) on its groove wall. The sealing member (2) is detachably connected to the installation part (111), and the tube head clip (3) is detachably connected to the installation part (111) of the guide groove (11) located at both ends of the guide member (1).

6. The turning structure of the conical hydrostatic pipe take-up and undo channel according to claim 5, characterized in that, The sealing component (2) is a rectangular cover plate, which is detachably connected to the mounting part (111) by bolts.

7. The turning structure of the winding channel for the drag cone static pressure pipe according to any one of claims 1-6, characterized in that, The connector (4) is an L-shaped plate, including a web (41) and a flange (42) connected to each other. The web (41) is detachably connected to the sealing member (2) by bolts, and the flange (42) is detachably connected to the external frame by bolts.

8. The turning structure of the winding channel for the drag cone static pressure pipe according to any one of claims 1-6, characterized in that, The guide (1) is made of lightweight metal or composite material.

9. A drag cone system, characterized in that, include: The control module (200) includes a take-up and release unit, a pressure sensing unit, and a data processing unit, all of which are electrically connected to the control module (200). A static pressure pipe take-up and release module (300) includes a plurality of the aforementioned drag cone static pressure pipe take-up and release channels (100) and a drag cone static pressure pipe take-up and release channel turning structure as described in any one of claims 1-8. The drag cone static pressure pipe take-up and release channel (100) is a straight pipe. When the static pressure pipe take-up and release module (300) needs to be bent, two adjacent drag cone static pressure pipe take-up and release channels (100) are connected through the drag cone static pressure pipe take-up and release channel turning structure. The test module (400) includes a static pressure tube (410) and a cone (420). One end of the static pressure tube (410) is inserted into the static pressure tube take-up and release module (300) and electrically connected to the control module (200). The other end of the static pressure tube (410) is connected to the cone (420).

10. The drag cone system according to claim 9, characterized in that, The inner opening at the end of the tractor cone static pressure pipe take-up and drop channel (100) is set as a smooth rounded corner or is deburred.

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