A bellows heat shrink sleeve blowing protection device and method

Abstract

The present invention belongs to the field of aviation cable manufacturing, and more specifically, it relates to a bellows heat shrink sleeve blowing protection device and method. Since the temperatures that thermoplastic clips and bellows can withstand are different, heat shrink clips are usually more resistant to high temperatures than bellows, and there is no way to protect the bellows, which causes high-temperature embrittlement of the bellows. The purpose of the present invention is to solve the problem of brittle cracking after the heat shrink sleeve is connected to the bellows, and it is also necessary to meet the connection between bellows and thermoplastic sleeves of different sizes. The functional area of ​​the device mainly includes a high-temperature hot air intake module, a high-temperature hot air uniform stirring module, a bellows local thermal insulation module and a ventilation and heat dissipation module. The bellows can be clamped smoothly, while avoiding the embrittlement of the bellows caused by high-temperature hot air. The heat shrink tube is fixed to the bellows, and the damage to the bellows can be minimized.

Description

Technical Field

[0001] The invention belongs to the field of aviation cable manufacturing, and more specifically, relates to a corrugated tube heat shrink sleeve blowing protection device and method. Background Art

[0002] A heat shrink tube needs to be installed on the cable jacket corrugated tube on the aircraft. The corrugated tube is mainly used to protect the wires used for signal transmission in the tube, and the corrugated tube needs to be fixed to the fuselage structure. At this time, a thermoplastic clip needs to be put on the outside of the corrugated tube.

[0003] Since the temperatures that thermoplastic clips and bellows can withstand are different, heat shrink clips are usually more resistant to high temperatures than bellows. When heating the heat shrink clips, a hot air blower is usually used to shrink the heat shrink clips. In this way, there is no way to protect the bellows, causing the high-temperature embrittlement of the bellows, resulting in cracks at the junction of the heat shrink clip and the bellows, or even rupture of the bellows, which cannot protect the signal line inside the bellows. Summary of the invention

[0004] The purpose of the present invention is to solve the problem of brittle cracking after the heat shrink sleeve is connected to the bellows, and it is also necessary to meet the connection of bellows of different sizes with thermoplastic sleeves. The functional area of ​​the device mainly includes a high-temperature hot air intake module, a high-temperature hot air uniform stirring module, a bellows local heat insulation module and a ventilation and heat dissipation module.

[0005] In one aspect, the present invention provides a bellows heat shrink sleeve blowing protection device, the device comprising a tooling part and an air guide unit for blowing hot air to the tooling part, the tooling part is an axisymmetric structure, and comprises:

[0006] An annular bottom cover composed of a first bottom cover and a second bottom cover, an annular top cover composed of a first top cover and a second top cover, a housing between the annular bottom cover and the annular top cover, a lower air guide cover supported on the upper end surface of the annular bottom cover, an upper pressure plate supported on the lower end surface of the annular top cover, an upper bearing, a fan blade assembly, an annular grille, an upper sealing sleeve, a lower sealing sleeve, an upper ball bearing and a lower ball bearing, wherein

[0007] A heat shrink sleeve is placed between the annular top cover and the lower air guide cover, and the bellows passes through the annular top cover, the heat shrink sleeve, the lower air guide cover and the annular bottom cover in sequence along the axial hole, and an upper sealing sleeve is sleeved on the surface of the bellows at the upper part of the heat shrink sleeve, and a lower sealing sleeve is sleeved on the surface of the bellows at the lower part of the heat shrink sleeve; an annular grille, a fan blade assembly, an upper bearing and a lower bearing are coaxially installed on the outer side of the heat shrink sleeve, an upper ball bearing is provided between the fan blade assembly and the upper pressure plate, and a lower ball bearing is provided between the fan blade assembly and the lower air guide cover, so that the fan blade assembly is driven to rotate under the action of the airflow;

[0008] The annular bottom cover has a fifth air guide hole, the lower air guide cover has a fourth air guide hole, and the annular top cover has a third air guide hole.

[0009] Advantageously, the air guide unit has a first air guide hole, the housing has a second air guide hole, and the first air guide hole is communicated with the second air guide hole.

[0010] Advantageously, the shell is connected to the upper pressure plate and the lower air guide cover by screws, the outer structures of the upper bearing and the lower bearing are stuck on the step surface inside the shell, the inner structure is connected to the movable blades of the fan blade assembly, and the annular grille is clamped between the annular top cover and the lower air guide cover; the heat is evenly transferred to the entire cavity through the rotation of the movable blades, and the heat shrink sleeve is heated by the annular grille diversion.

[0011] Advantageously, the fourth air guide hole of the lower air guide cover is internally connected with the fifth air guide hole of the annular bottom cover.

[0012] Advantageously, a first lower guide rod and a second lower guide rod are arranged in parallel between the first bottom cover and the second bottom cover, and the first bottom cover and the second bottom cover can be opened or closed along the first lower guide rod and the second lower guide rod.

[0013] Advantageously, the parts of the first lower guide rod and the second lower guide rod extending out of the first bottom cover are connected to the first lower support, the parts of the first lower guide rod and the second lower guide rod extending out of the second bottom cover are connected to the second lower support, and the first lower support and the second lower support are fixed to the base by mounting bolts.

[0014] Advantageously, the first lower support is vertically provided with a first column and a second column, the first upper support is supported on the first column and the second column, and the upper end surfaces at both ends of the first upper support are provided with a first groove body;

[0015] A third column and a fourth column are vertically arranged on the second lower support, the second upper support is supported on the third column and the fourth column, and a second trough is arranged on the upper end surfaces at both ends of the second upper support.

[0016] A first upper guide rod and a second upper guide rod are arranged in parallel between the first top cover and the second top cover, and the first top cover and the second top cover can be opened or closed along the first upper guide rod and the second upper guide rod; the parts of the first upper guide rod and the second upper guide rod extending out of the second top cover are hinged in the second trough body, and the parts of the first upper guide rod and the second upper guide rod extending out of the first top cover can be pressed into the first trough body and fixed by clamping bolts.

[0017] Advantageously, the first column, the second column, the third column and the fourth column all have a small-diameter rod portion at the upper portion, so as to have a supporting function.

[0018] Advantageously, the first upper guide rod and the second upper guide rod are hinged in the second slot body of the second upper support via a rotating shaft; and guide pins are also provided on the upper end surfaces of the first bottom cover and the second bottom cover.

[0019] The present invention also provides a bellows heat shrink sleeve blowing protection method, the method adopts the bellows heat shrink sleeve blowing protection device, and comprises the following steps:

[0020] S1, open the first top cover and the second top cover horizontally, and open the first bottom cover and the second bottom cover horizontally;

[0021] S2. Put the lower sealing sleeve into the shaft hole of the lower air guide cover, the upper end of the sealing sleeve is flush with the upper end of the lower air guide cover, the fan blade assembly integrated with the bearing is placed on the upper end of the lower air guide cover, and the lower ball is installed between the two. The annular grid with the heat shrink sleeve installed is placed on the upper end surface of the lower air guide cover, the bellows is passed through the lower sealing sleeve and the heat shrink sleeve, and the first bottom cover and the second bottom cover are closed;

[0022] S3. Place the upper pressure plate above the fan blade assembly, with the upper ball bearing installed between the two;

[0023] S4. Put a sealing sleeve on the corrugated tube on the upper side of the heat shrink sleeve, close the first top cover and the second top cover and tighten them;

[0024] S5, heating and achieving shrinkage protection.

[0025] Beneficial effect: The present invention forms a whole to ensure that the thermoplastic sleeve can smoothly clamp the corrugated tube, while preventing the corrugated tube from becoming brittle due to high-temperature hot air. It solves the problem of fixing the heat shrink tube to the corrugated tube and can minimize the damage to the corrugated tube.

[0026] The features, functions, and advantages that have been discussed can be achieved independently in various examples or may be combined in yet other examples. Further details of the examples can be seen with reference to the following description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The illustrative examples, as well as the preferred modes of use, other objects and description thereof, will be best understood by reference to the following detailed description of examples of the invention when read in conjunction with the accompanying drawings, in which:

[0028] Figure 1 This is the overall appearance of the protection device;

[0029] Figure 2 An attempt to protect the device from explosion;

[0030] Figure 3 It is a partial longitudinal cross-sectional view of the protective device.

[0031] 1. First top cover; 2. First column; 3. First upper support; 4. First upper guide rod; 5. Second column; 6. First lower support; 7. First connecting rod; 8. First bottom cover; 9. Second bottom cover; 10. Second connecting rod; 11. Third column; 12. Second lower support; 13. Fourth column; 14. Second upper support; 15. Third connecting rod; 16. Second top cover; 17. Air guide unit; 18. Small diameter rod; 19. Clamping bolt; 20. Rotating shaft; 21. Housing; 22. Upper sealing sleeve ; 23, upper pressure plate; 24, screws; 25, upper ball bearing; 26, heat shrink sleeve; 27, upper bearing; 28, ring grille; 29, fan blade assembly; 30, lower bearing; 31, lower air guide cover; 32, fourth air guide hole; 33, mounting bolts; 34, fifth air guide hole; 35, first lower guide rod; 36, guide pin; 38, second upper guide rod; 39, first air guide hole; 40, second lower guide rod; 41, lower ball bearing; 42, lower sealing sleeve; 43, second air guide hole; 44, third air guide hole DETAILED DESCRIPTION

[0032] The disclosed examples will be more fully described with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0033] Referring to the accompanying drawings, a bellows heat shrink sleeve blowing protection device includes a tooling part and an air guide unit 17 for blowing hot air to the tooling part. The tooling part is an axisymmetric structure and includes:

[0034] An annular bottom cover composed of a first bottom cover 8 and a second bottom cover 9, an annular top cover composed of a first top cover 1 and a second top cover 16, a housing 21 between the annular bottom cover and the annular top cover, a lower air guide cover 31 supported on the upper end surface of the annular bottom cover, an upper pressure plate 23 supported on the lower end surface of the annular top cover, an upper bearing 27, a fan blade assembly 29, an annular grille 28, an upper sealing sleeve 22, a lower sealing sleeve 42, an upper ball 25 and a lower ball 41, wherein

[0035] A heat shrink sleeve 26 is placed between the annular top cover and the lower air guide cover 31, and the bellows passes through the annular top cover, the heat shrink sleeve 26, the lower air guide cover 31 and the annular bottom cover in sequence along the axial hole, and an upper sealing sleeve 22 is sleeved on the surface of the bellows at the upper part of the heat shrink sleeve 26, and a lower sealing sleeve 42 is sleeved on the surface of the bellows at the lower part of the heat shrink sleeve 26; an annular grille 28, a fan blade assembly 29, an upper bearing 27 and a lower bearing 30 are coaxially installed on the outer side of the heat shrink sleeve 26, an upper ball 25 is provided between the fan blade assembly 29 and the upper pressure plate 23, and a lower ball 41 is provided between the fan blade assembly 29 and the lower air guide cover 31, so that the fan blade assembly 29 is driven to rotate under the action of the airflow;

[0036] The annular bottom cover has a fifth air guide hole 34 , the lower air guide cover 31 has a fourth air guide hole 32 , and the annular top cover has a third air guide hole 44 .

[0037] The air guide unit 17 has a first air guide hole 39, and the shell 21 has a second air guide hole 43, and the first air guide hole 39 is connected to the second air guide hole 43. The shell 21 is connected to the upper pressure plate 23 and the lower air guide cover 31 through screws 24. The outer structures of the upper bearing 27 and the lower bearing 30 are stuck on the step surface inside the shell 21, and the inner structure is connected to the movable blades of the fan blade assembly 29. The annular grille 28 is clamped between the annular top cover and the lower air guide cover 31; the heat is evenly transported to the entire cavity through the rotation of the movable blades, and the heat shrink sleeve 26 is heated by the annular grille 28. The fourth air guide hole 32 of the lower air guide cover 31 is internally connected to the fifth air guide hole 34 of the annular bottom cover.

[0038] A first lower guide rod 35 and a second lower guide rod 40 are arranged in parallel between the first bottom cover 8 and the second bottom cover 9, and the first bottom cover 8 and the second bottom cover 9 can be opened or closed along the first lower guide rod 35 and the second lower guide rod 40. The first lower guide rod 35 and the second lower guide rod 40 extending out of the first bottom cover 8 (the first connecting rod 7) are connected to the first lower support 6, and the first lower guide rod 35 and the second lower guide rod 40 extending out of the second bottom cover 9 (the third connecting rod 15) are connected to the second lower support 12, and the first lower support 6 and the second lower support 12 are fixed to the base by mounting bolts 33. A first column 2 and a second column 5 are vertically provided on the first lower support 6, the first upper support 3 is supported on the first column 2 and the second column 5, and a first trough body is provided on the upper end surfaces at both ends of the first upper support 3; a third column 11 and a fourth column 13 are vertically provided on the second lower support 12, the second upper support 14 is supported on the third column 11 and the fourth column 13, and a second trough body is provided on the upper end surfaces at both ends of the second upper support 14, a first upper guide rod 4 and a second upper guide rod 38 are arranged in parallel between the first top cover 1 and the second top cover 16, and the first top cover 1 and the second top cover 16 can be opened or closed along the first upper guide rod 4 and the second upper guide rod 38; the part (second connecting rod 10) of the first upper guide rod 4 and the second upper guide rod 38 extending out of the second top cover 1 is hinged in the second trough body, and the part of the first upper guide rod 4 and the second upper guide rod 38 extending out of the first top cover 1 can be pressed into the first trough body and fixed by the clamping bolt 19.

[0039] The first column 2, the second column 5, the third column 11 and the fourth column 13 all have a small diameter rod portion 18 at the upper part, so as to have a supporting function. The first upper guide rod 4 and the second upper guide rod 38 are hinged in the second groove body of the second upper support 14 through the rotating shaft 20; and the upper end surfaces of the first bottom cover 8 and the second bottom cover 9 are also provided with a guide pin 36.

[0040] During operation, the heat shrink sleeve 26 is first placed inside the tooling, and then the bellows is passed through the tooling body and the pre-placed heat shrink sleeve 26, and then the high-temperature and high-speed gas is introduced into the tooling body through the gas guide unit 17. The heat shrink sleeve 26 gradually shrinks after being heated by the high-temperature and high-speed gas, and is finally fixed on the bellows.

[0041] The description of different advantageous arrangements has been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to examples of the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may describe different advantages over other advantageous examples. The selected example or examples are chosen and described in order to best illustrate the principles of the examples, the practical application, and to enable those of ordinary skill in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. A bellows heat shrink sleeve blowing protection device, characterized in that: The device comprises a tooling part and an air guide unit (17) for blowing hot air toward the tooling part. The tooling part is an axisymmetric structure and comprises: An annular bottom cover composed of a first bottom cover (8) and a second bottom cover (9), an annular top cover composed of a first top cover (1) and a second top cover (16), a housing (21) between the annular bottom cover and the annular top cover, a lower air guide cover (31) supported on the upper end surface of the annular bottom cover, an upper pressure plate (23) supported on the lower end surface of the annular top cover, an upper bearing (27), a fan blade assembly (29), an annular grille (28), an upper sealing sleeve (22), a lower sealing sleeve (42), an upper ball bearing (25) and a lower ball bearing (41), wherein The air guide unit (17) has a first air guide hole (39), the housing (21) has a second air guide hole (43), and the first air guide hole (39) is connected to the second air guide hole (43); a heat shrink sleeve (26) is placed between the annular top cover and the lower air guide cover (31); the bellows passes through the annular top cover, the heat shrink sleeve (26), the lower air guide cover (31) and the annular bottom cover in sequence along the hole; an upper sealing sleeve (22) is sleeved on the surface of the bellows above the heat shrink sleeve (26); A lower sealing sleeve (42) is sleeved on the surface of the bellows at the lower part of the heat shrink sleeve (26); an annular grille (28), a fan blade assembly (29), an upper bearing (27) and a lower bearing (30) are coaxially mounted on the outer side of the heat shrink sleeve (26); an upper ball bearing (25) is provided between the fan blade assembly (29) and the upper pressure plate (23); and a lower ball bearing (41) is provided between the fan blade assembly (29) and the lower air guide cover (31), so that the fan blade assembly (29) is driven to rotate under the action of airflow; The annular bottom cover has a fifth air guide hole (34), the lower air guide cover (31) has a fourth air guide hole (32), and the annular top cover has a third air guide hole (44).

2. The bellows heat shrink sleeve blowing protection device according to claim 1, characterized in that: The shell (21) is connected to the upper pressure plate (23) and the lower air guide cover (31) by means of screws (24); the outer structures of the upper bearing (27) and the lower bearing (30) are clamped on the step surface on the inner side of the shell (21); the inner structures of the upper bearing (27) and the lower bearing (30) are connected to the movable blades of the fan blade assembly (29); the annular grille (28) is clamped between the annular top cover and the lower air guide cover (31); heat is evenly transported to the entire cavity through the rotation of the movable blades, and the heat shrink sleeve (26) is heated by diverting the heat through the annular grille (28).

3. The bellows heat shrink sleeve blowing protection device according to claim 1, characterized in that: The fourth air guide hole (32) of the lower air guide cover (31) is internally connected to the fifth air guide hole (34) of the annular bottom cover.

4. The bellows heat shrink sleeve blowing protection device according to claim 1, characterized in that: A first lower guide rod (35) and a second lower guide rod (40) are arranged in parallel between the first bottom cover (8) and the second bottom cover (9); the first bottom cover (8) and the second bottom cover (9) can be opened or closed along the first lower guide rod (35) and the second lower guide rod (40).

5. The bellows heat shrink sleeve blowing protection device according to claim 4, characterized in that: The portions of the first lower guide rod (35) and the second lower guide rod (40) extending out of the first bottom cover (8) are connected to the first lower support (6), and the portions of the first lower guide rod (35) and the second lower guide rod (40) extending out of the second bottom cover (9) are connected to the second lower support (12). The first lower support (6) and the second lower support (12) are fixed to the base by means of mounting bolts (33).

6. The bellows heat shrink sleeve blowing protection device according to claim 5, characterized in that: A first column (2) and a second column (5) are vertically provided on the first lower support (6); a first upper support (3) is supported on the first column (2) and the second column (5); and first grooves are provided on the upper end surfaces at both ends of the first upper support (3); A third column (11) and a fourth column (13) are vertically provided on the second lower support (12); a second upper support (14) is supported on the third column (11) and the fourth column (13); and a second trough is provided on the upper end surfaces at both ends of the second upper support (14). A first upper guide rod (4) and a second upper guide rod (38) are arranged in parallel between the first top cover (1) and the second top cover (16); the first top cover (1) and the second top cover (16) can be opened or closed along the first upper guide rod (4) and the second upper guide rod (38); the parts of the first upper guide rod (4) and the second upper guide rod (38) extending out of the second top cover (16) are hinged in the second groove body; the parts of the first upper guide rod (4) and the second upper guide rod (38) extending out of the first top cover (1) can be pressed into the first groove body and fixed by a clamping bolt (19).

7. The bellows heat shrink sleeve blowing protection device according to claim 6, characterized in that: The first column (2), the second column (5), the third column (11) and the fourth column (13) all have a small-diameter rod portion (18) at the top, thereby having a supporting function.

8. The bellows heat shrink sleeve blowing protection device according to claim 7, characterized in that: The first upper guide rod (4) and the second upper guide rod (38) are hinged in the second groove body of the second upper support (14) via a rotating shaft (20); and guide pins (36) are also provided on the upper end surfaces of the first bottom cover (8) and the second bottom cover (9).

9. A bellows heat shrink sleeve blowing protection method, characterized in that: The method uses the corrugated tube heat shrink sleeve blowing protection device according to any one of claims 1 to 8, comprising the following steps: S1, open the first top cover (1) and the second top cover (16) horizontally, and open the first bottom cover (8) and the second bottom cover (9) horizontally; S2, insert the lower sealing sleeve (42) into the shaft hole of the lower air guide cover (31), the upper end of the lower sealing sleeve (42) is flush with the upper end of the lower air guide cover (31), the fan blade assembly (29) integrated with the bearing is placed on the upper end of the lower air guide cover (31), and the lower ball (41) is installed between the two, and the annular grille (28) loaded with the heat shrink sleeve (26) is placed on the upper end surface of the lower air guide cover (31), the bellows is passed through the lower sealing sleeve (42) and the heat shrink sleeve (26), and the first bottom cover (8) and the second bottom cover (9) are closed; S3, placing an upper pressure plate (23) above the fan blade assembly (29), with an upper ball bearing (25) installed between the two; S4, put the sealing sleeve (22) on the corrugated tube on the upper side of the heat shrink sleeve (26), close the first top cover (1) and the second top cover (16) and tighten them; S5, heating and achieving shrinkage protection.

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