Air sealing structure

Abstract

The utility model discloses an air sealing structure which comprises a supporting sleeve located on an air sealing support, an air sealing sleeve is arranged in the supporting sleeve, an air sealing through hole is formed in the middle of the air sealing sleeve, a carbon fiber precursor penetrates through the air sealing through hole, an air blowing ring cavity and an air suction ring cavity are formed in the air sealing sleeve, and the air blowing ring cavity is communicated with the air suction ring cavity. The air blowing ring cavity is provided with an air blowing hole communicated with the air seal through hole, the air suction ring cavity is provided with an air suction hole communicated with the air seal through hole, and the air seal sleeve is provided with an air blowing channel communicated with the air blowing ring cavity and an air suction channel communicated with the air suction ring cavity. The supporting sleeve is provided with an air blowing pipe corresponding to the air blowing channel and an air suction pipe corresponding to the air suction channel, the total air sealing space is reduced, the output power of the air suction fan and the air blowing fan is reduced, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of air seals, and more specifically relates to an airtight structure. Background Art

[0002] Carbon fiber precursor finally forms carbon fiber after a series of chemical reactions in an oxidation furnace and a high-carbon furnace. To achieve the oxidation and carbonization of the carbon fiber precursor, the furnace is filled with a special gas. The two ends of the furnace body are the inlets and outlets of the carbon fiber precursor. To avoid the exchange and mixing of gases inside and outside the furnace, a sealing device, generally an airtight structure, needs to be set at the inlets and outlets.

[0003] The traditional airtight structure includes an air outlet device and an air suction device, and the air outlet device and the air suction device are both arranged on the upper and lower sides of the precursor on the same layer. The air outlet device blows out a part of the gas in the furnace at the inlets and outlets, and the air suction device is located outside the air outlet device and is used to absorb the outside air at the inlets and outlets and the gas in the furnace blown out by the air outlet device, and then transports the mixed gas to a filtering device for filtering, and the filtered gas is used as the gas in the furnace again after filtering.

[0004] That is, the current traditional airtight structures are all planar. The precursors on the same layer share a long strip-shaped inlet and outlet. Also, because the transverse width of the furnace body inlet and outlet is large, and a certain distance needs to be left between two adjacent carbon fiber precursors, the airtight space required at the inlets and outlets is large, and a very powerful air outlet device and air suction device are needed to ensure the airtight effect, while high-power blowers consume a large amount of energy. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides an airtight structure, which reduces the total airtight space on the inlet and outlet of the furnace body, thereby reducing the output power of the air suction blower and the air blowing blower, and saving energy consumption.

[0006] To achieve the above object, the utility model provides the following technical solution: an airtight structure, including a support sleeve located on an air seal bracket, an air seal sleeve is arranged inside the support sleeve, an air seal through hole is arranged in the middle of the air seal sleeve, and the carbon fiber precursor passes through the air seal through hole. A blowing ring cavity and a suction ring cavity are arranged inside the air seal sleeve. Blowing holes communicating with the air seal through hole are arranged on the blowing ring cavity, and suction holes communicating with the air seal through hole are arranged on the suction ring cavity. A blowing channel communicating with the blowing ring cavity and a suction channel communicating with the suction ring cavity are arranged on the air seal sleeve, and a blowing pipe corresponding to the blowing channel and a suction pipe corresponding to the suction channel are arranged on the support sleeve.

[0007] Furthermore, a plurality of blowing holes and suction holes are arranged, and are respectively circumferentially distributed on the air seal through hole.

[0008] Furthermore, two rows of the air blowing holes and the air suction holes are arranged in the length direction of the air sealing through hole.

[0009] Furthermore, the air sealing sleeve and the support sleeve are detachably connected.

[0010] Furthermore, a telescopic connecting rod is arranged on the support sleeve, and a connecting hole corresponding to the connecting rod is arranged on the air sealing sleeve.

[0011] Furthermore, a telescopic spring is arranged between the connecting rod and the support sleeve.

[0012] Furthermore, a sealing ring is arranged on the inner surface of the support sleeve or the outer surface of the air sealing sleeve.

[0013] Furthermore, a positioning assembly is arranged between the air sealing sleeve and the support sleeve.

[0014] Furthermore, the positioning assembly includes a positioning ring on the inner surface of one end of the support sleeve and a positioning strip extending along the length direction of the inner surface of the support sleeve. A first positioning groove corresponding to the positioning ring is arranged at one end of the air sealing sleeve, and a second positioning groove corresponding to the positioning strip is arranged on the outer surface of the air sealing sleeve.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: By enabling a single carbon fiber raw wire to pass through the air sealing through hole alone, the total air sealing space is reduced, the output power of the air suction fan and the air blowing fan is lowered, and the energy consumption is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the air sealing structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the air sealing of the air sealing structure of the present utility model.

[0018] Reference numerals: support sleeve 1; air sealing sleeve 2; air sealing through hole 3; air blowing ring cavity 4; air suction ring cavity 5; air blowing hole 6; air suction hole 7; air blowing channel 8; air suction channel 9; air blowing pipe 10; air suction pipe 11; connecting rod 12; connecting hole 13; telescopic spring 14; spring cover 15; retaining ring 16; sealing ring 17; positioning ring 18; first positioning groove 19; pull ring 20; carbon fiber raw wire 21. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In the description of the present utility model, it should be noted that for orientation terms, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationships are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0020] In addition, such terms as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0021] Refer to Figure 1 and Figure 2 for further description of the present utility model.

[0022] Embodiment 1:

[0023] A gas sealing structure includes a support sleeve 1 located on a gas sealing bracket. A gas sealing sleeve 2 is arranged inside the support sleeve 1. A gas sealing through-hole 3 is arranged in the middle of the gas sealing sleeve 2. A carbon fiber roving 21 passes through the gas sealing through-hole 3. A blowing ring cavity 4 and a suction ring cavity 5 are arranged inside the gas sealing sleeve 2. A blowing hole 6 communicating with the gas sealing through-hole 3 is arranged on the blowing ring cavity 4. A suction hole 7 communicating with the gas sealing through-hole 3 is arranged on the suction ring cavity 5. A blowing channel 8 communicating with the blowing ring cavity 4 and a suction channel 9 communicating with the suction ring cavity 5 are arranged on the gas sealing sleeve 2. A blowing pipe 10 corresponding to the blowing channel 8 and a suction pipe 11 corresponding to the suction channel 9 are arranged on the support sleeve 1.

[0024] As Figure 1 and Figure 2 shown, by separately passing a single carbon fiber roving 21 through the gas sealing through-hole 3, the total gas sealing space is reduced, the output power of the suction fan and the blowing fan is lowered, and energy consumption is saved.

[0025] During processing, the carbon fiber roving 21 passes through the gas sealing through-hole 3, and then the gas in the furnace is blown into the gas sealing channel through the blowing pipe 10, and the gas in the gas sealing channel is absorbed through the suction pipe 11, thereby isolating the exchange of gases between the two sides inside and outside the gas sealing channel.

[0026] Specifically, air seal brackets are provided at both ends of the furnace body, and corresponding support sleeves 1 are provided on the air seal brackets according to the arrangement mode and quantity of the carbon fiber roving 21 entering the furnace body. An air seal sleeve 2 is installed on the support sleeve 1. Except for the air seal through holes 3 on the air seal sleeve 2, the rest of the air seal bracket is completely sealed.

[0027] Specifically, support sleeves 1 with the maximum quantity of carbon fiber roving 21 that the furnace body can process can be provided on the air seal bracket first, and then the air seal sleeve 2 can be installed on the corresponding support sleeve 1 according to the actual quantity to be processed. The support sleeves 1 of the air seal sleeves 2 not installed can use sealing blocks to block and seal the installation holes on the support sleeves 1.

[0028] Specifically, the outer shapes of the support sleeve 1 and the air seal sleeve 2 can be cylindrical or multi-prismatic.

[0029] As Figure 1 shown, preferably in this embodiment, a plurality of air blowing holes 6 and air suction holes 7 are provided, and are respectively circumferentially distributed on the air seal through hole 3 to improve the air seal effect.

[0030] As Figure 1 shown, preferably in this embodiment, two rows of air blowing holes 6 and air suction holes 7 are provided in the length direction of the air seal through hole 3 to improve the air seal effect.

[0031] Specifically, the two rows of air blowing holes 6 blow the gas to both sides respectively, and the two rows of air suction holes 7 suck the gas from both sides respectively.

[0032] Specifically, the two rows of air blowing holes 6 and the two rows of air suction holes 7 are respectively inclined to both sides.

[0033] As Figure 1 shown, preferably in this embodiment, the air seal sleeve 2 is detachably connected to the support sleeve 1.

[0034] As Figure 1 shown, preferably in this embodiment, a telescopic connecting rod 12 is provided on the support sleeve 1, and a connection hole 13 corresponding to the connecting rod 12 is provided on the air seal sleeve 2.

[0035] As Figure 1 shown, preferably in this embodiment, a telescopic spring 14 is provided between the connecting rod 12 and the support sleeve 1.

[0036] Specifically, a spring hole is provided on the support sleeve 1, a spring cover 15 is threadedly connected to the spring hole, the telescopic spring 14 is located in the spring hole, the connecting rod 12 passes through and passes through the telescopic spring 14, and a ring of retaining rings 16 is provided on the connecting rod 12, and the retaining ring 16 is located at the lower end of the telescopic spring 14.

[0037] When installing the air seal sleeve 2, pull up the connecting rod 12 to compress the telescopic spring 14, and then insert the air seal sleeve 2 into the support sleeve 1. When the connection hole 13 on the air seal sleeve 2 aligns with the connecting rod 12, release the connecting rod 12, and the telescopic spring 14 releases its elastic force to make the connecting rod 12 extend into the connection hole 13, realizing the fixed connection of the air seal sleeve 2.

[0038] Specifically, a pull ring 20 is provided at the end of the connecting rod 12 to facilitate pulling up the telescopic spring 14.

[0039] Such as Figure 1 shown, in this embodiment preferably, a sealing ring 17 is provided on the inner surface of the support sleeve 1 or the outer surface of the air seal sleeve 2 to improve the sealing performance between the air seal sleeve 2 and the support sleeve 1.

[0040] In this embodiment preferably, a positioning assembly is provided between the air seal sleeve 2 and the support sleeve 1.

[0041] Such as Figure 1 shown, in this embodiment preferably, the positioning assembly includes a positioning ring 18 on the inner surface at one end of the support sleeve 1 and a positioning strip (not shown in the drawing) extending along the length direction of the inner surface of the support sleeve 1. A first positioning groove 19 corresponding to the positioning ring 18 is provided at one end of the air seal sleeve 2, and a second positioning groove corresponding to the positioning strip is provided on the outer surface of the air seal sleeve 2 (not shown in the drawing).

[0042] Specifically, before installing the air seal sleeve 2, align the second positioning groove with the positioning strip, and then insert the air seal sleeve 2 until the first positioning groove 19 cooperates with the positioning ring 18. At this time, the connection hole 13 on the air seal sleeve 2 just aligns with the connecting rod 12.

[0043] Embodiment 2:

[0044] On the basis of Embodiment 1, a plurality of continuously adjacent support sleeves 1 can be connected to form an integral body, the adjacent mounting holes are close to or communicate with each other, and then a plurality of independent air seal sleeves 2 are installed in the communicating mounting holes.

[0045] Embodiment 3:

[0046] On the basis of Embodiment 2, a plurality of continuously adjacent air seal sleeves 2 can also be connected to form an integral body, and the plurality of air suction ring cavities 5 and the blowing ring cavities 4 communicate with each other, so that the adjacent air seal channels are close to each other but do not directly communicate.

[0047] The above are only the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.

Claims

1. An airtight sealing structure, characterized in that: It includes a supporting sleeve located on an air-sealing bracket, an air-sealing sleeve is arranged in the supporting sleeve, an air-sealing through hole is arranged in the middle of the air-sealing sleeve, carbon fiber filaments pass through the air-sealing through hole, a blowing ring cavity and an air-suction ring cavity are arranged in the air-sealing sleeve, a blowing hole connected to the air-sealing through hole is arranged on the blowing ring cavity, an air-suction hole connected to the air-sealing through hole is arranged on the air-suction ring cavity, a blowing channel connected to the blowing ring cavity and an air-suction channel connected to the air-suction ring cavity are arranged on the air-sealing sleeve, and an air blowing pipe corresponding to the air blowing channel and an air suction pipe corresponding to the air suction channel are arranged on the supporting sleeve.

2. The airtight sealing structure according to claim 1, characterized in that: A plurality of the air blowing holes and the air suction holes are provided and are circumferentially distributed on the air sealing through hole.

3. The airtight sealing structure according to claim 2, characterized in that: The air blowing holes and the air suction holes are both arranged in two rows in the length direction of the air sealing through hole.

4. The airtight sealing structure according to claim 1, characterized in that: The air sealing sleeve and the supporting sleeve are detachably connected.

5. The airtight sealing structure according to claim 4, characterized in that: The support sleeve is provided with a retractable connecting rod, and the air sealing sleeve is provided with a connecting hole corresponding to the connecting rod.

6. The airtight sealing structure according to claim 5, characterized in that: A telescopic spring is arranged between the connecting rod and the supporting sleeve.

7. The airtight sealing structure according to claim 1, characterized in that: A sealing ring is arranged on the inner surface of the supporting sleeve or the outer surface of the air-sealing sleeve.

8. The airtight sealing structure according to claim 1, characterized in that: A positioning assembly is arranged between the air sealing sleeve and the supporting sleeve.

9. The airtight sealing structure according to claim 8, characterized in that: The positioning assembly includes a positioning ring located on the inner surface of one end of the support sleeve and a positioning strip extending along the length direction of the inner surface of the support sleeve. A first positioning groove corresponding to the positioning ring is provided at one end of the air sealing sleeve, and a second positioning groove corresponding to the positioning strip is provided on the outer surface of the air sealing sleeve.

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