Spraying and spraying pipeline system of oxidation furnace

Abstract

The utility model relates to a spraying and spraying pipeline system of an oxidation furnace. The spraying and spraying pipeline system comprises a spraying branch, a spraying main pipe, a spraying branch, a spraying main pipe and a water inlet pipe group, according to the scheme, after a temperature sensor of the carbon fiber oxidation furnace monitors certain overtemperature, spraying can be conducted on a heating area in time, the circulating air temperature is reduced, accumulated excess heat in a process area is taken away in time, hidden dangers are eliminated, and carbon fiber precursors are not affected; when fire catching occurs due to sharp temperature rise and spraying is carried out, a special 1 / 4 spherical spraying flange head and a spraying connector are sealed to guarantee the spraying fire extinguishing effect, a thick water column formed by water leakage is prevented from rushing off protofilaments, it is guaranteed that spraying is carried out from the two ends to the middle in each process area in the spraying range, and spraying impact on key equipment in the process areas is avoided while full coverage is achieved; the later maintenance cost is reduced, the impact of excessive spraying lines on the protofilaments is also avoided, the life and property safety is ensured to the maximum extent, and the loss is reduced; and residual deionized water in the spraying pipe can be discharged in time after spraying is finished.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon fiber oxidation furnace equipment, in particular to an oxidation furnace spraying pipeline system. Background Art

[0002] As the core equipment in the carbon fiber production line, the carbon fiber oxidation furnace combines the incoming raw fibers with oxygen molecules in the air through a uniformly distributed high-temperature airflow, so that the polymer chains begin to cross-link and react exothermically. The exothermic reaction will cause heat accumulation. When the temperature control is abnormal and the furnace is overheated, there will be safety hazards, which may affect the quality of the carbon fiber and damage the equipment, or even cause a fire accident. At present, 1. The oxidation furnace spray device is designed to quickly extinguish the process area in the furnace when a fire accident occurs. However, there is no protection measure in the initial overtemperature situation. 2. In addition, the spray ball head and the spray water pipe of the existing spray device are connected by a cotter pin, and the connection is not sealed enough. Under the action of high flow and high pressure of the spray, water leakage will occur at the interface, which will hinder the dispersion of the spray water and affect the fire extinguishing performance. And the leaked water will form a thicker water column and fall, breaking the raw fibers and causing greater losses. 3. After the spraying is completed, the water in the pipe cannot be discharged in time, and it will always form large water droplets from the spray ball head in the furnace along the pipeline. The duration is very long, which affects the cleaning and maintenance, delays the restart time, and may continue to drip when the machine is restarted, affecting the quality of the yarn. Utility Model Content

[0003] The utility model aims to provide an oxidation furnace spraying and misting pipeline system, in order to solve all or part of the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An oxidation furnace spray pipe system includes a spray branch, a spray main pipe, a spray branch, a spray main pipe, and a water inlet pipe group;

[0006] A spray branch, the spray branch comprises a ball valve, a drain pipe, a short-circuit flange, a spray water pipe, and a spray ball head assembly. One end of the spray water pipe is connected to the spray ball head assembly, the other end of the spray water pipe is connected to the short-circuit flange, the drain pipe is connected to the bottom end of the short-circuit flange, and a ball valve is arranged on the drain pipe;

[0007] A spray branch, the spray branch comprising a spray water pipe and a spray head, one end of the spray water pipe being connected to the spray head;

[0008] The water inlet pipe group is connected to the spray main pipe and the spray main pipe respectively, the short-circuit flange of the spray branch is connected to the spray main pipe, and the spray water pipe of the spray branch is connected to the spray main pipe.

[0009] Preferably, the spray water pipe and the spray main pipe are also connected by a short-circuit flange, and the short-circuit flange is an inverted U-shaped structure, and the top of the inverted U is higher than the spray main pipe or the spray main pipe. The short-circuit flange design of the upstream pipeline ensures that the deionized water in the main pipe will not continue to flow to the spray spray water pipe after the spray spray is completed. After the spraying is completed, open the ball valve to discharge the deionized water remaining in the spray pipe in time. The spray main pipe and the spray main pipe are arranged on both sides of the outside of the carbon fiber oxidation furnace, and the spray branch and the spray branch are arranged opposite to each other. The pipeline system described in the utility model includes a plurality of spray branches and spray branches.

[0010] In an embodiment that can optimize the above-mentioned solution, the spray ball head assembly includes a spray flange head and a flexible graphite composite gasket, and the flexible graphite composite gasket is arranged between the spray flange head and the spray water pipe. Because the furnace is at high temperature, especially in the event of a fire accident, a flexible graphite composite gasket with good high temperature resistance and sealing performance and a spray flange head are used to form a spray ball head assembly, which is tightly connected to the spray water pipe through bolts.

[0011] In an embodiment that can optimize the above-mentioned solution, at least one of the connection parts of the spray flange head and the spray water pipe is provided with a boss. At least one of the spray flange head and the spray water pipe is provided with a finely machined boss, which is tightly matched with the flexible graphite composite gasket through bolts to achieve spray sealing. Preferably, both the spray flange head and the spray water pipe can be provided with a boss.

[0012] In an embodiment that can optimize the above-mentioned solution, the spray flange head is a spherical spray flange head, and a spray hole is opened on the lower 1 / 4 spherical surface. The spray hole on the lower 1 / 4 spherical surface allows spraying, and the spray coverage is horizontal and downward. Areas without spraying requirements are not sprayed, so as to prevent spraying to the top, causing a large amount of water to accumulate at the bottom. The impact of falling water drops will cause the carbon fiber precursor to break, causing greater losses.

[0013] In an implementation method that can optimize the above-mentioned solution, two groups of spray branches are arranged in each process zone of the carbon fiber oxidation furnace, and the two groups of spray branches are respectively arranged at two ends of each process zone.

[0014] In an implementation method that can optimize the above-mentioned solution, the spray holes of the two spray flange heads in the same process area are arranged opposite to each other. The spray branches are installed at both ends of each process area, and the spray is relatively inward, ensuring that the spray fully covers each process area and avoids water spray impact on key equipment constituting the process area, such as gas seals, intermediate distributors, etc., reducing the subsequent maintenance cost and avoiding the impact of too many spray lines on the original silk.

[0015] In an embodiment that can optimize the above-mentioned solution, the spray water pipe is sealed and connected to the spray head through a pipe thread. The flow rate at the spray point is small, and the spray head is sealed and connected to the spray water pipe through a sealed pipe thread.

[0016] In an implementation that can optimize the above-mentioned solution, the spray water pipe and the spray water pipe are pre-buried in the top wall of the carbon fiber oxidation furnace, and one end extends into the process area of ​​the carbon fiber oxidation furnace and is connected to the spray ball head assembly and the spray head respectively. The spray water pipe and the spray water pipe are pre-buried in the top wall of the carbon fiber oxidation furnace to further improve the sealing effect of the oxidation furnace. Directly penetrating into the process area from the top will put forward more stringent requirements on the sealing of the process area. The pre-buried treatment can effectively reduce the equipment cost.

[0017] In an embodiment that can optimize the above-mentioned solution, it also includes a bracket 1, which is fixed outside the side wall of the carbon fiber oxidation furnace, and the bracket 1 is fixedly connected to the drain pipe. The bracket 1 is fixedly connected to the drain pipe through a U-bolt, and is welded outside the side wall of the oxidation furnace body to play a supporting role.

[0018] In an implementation that can optimize the above-mentioned solution, it also includes a second bracket and a third bracket, wherein the second bracket is fixed outside the side wall of the carbon fiber oxidation furnace, and the third bracket is fixed on the ground, and the second bracket is fixedly connected to the third bracket. The second bracket is welded outside the side wall of the oxidation furnace body, and the third bracket is placed on the ground. The second bracket and the third bracket are both fixedly connected to the water inlet pipe group by U-bolts to support it.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model discloses an oxidation furnace spraying and spraying pipeline system, which ensures that after the temperature sensor of the carbon fiber oxidation furnace detects a certain over-temperature situation, the heating area can be sprayed in time to reduce the circulating air temperature and timely take away the excess heat accumulated in the process area, eliminate hidden dangers, and do not affect the carbon fiber precursor; when the temperature rises sharply and a fire occurs and spraying is performed, a special 1 / 4 spherical spray flange head is made, and the spray joint is sealed to ensure its spraying fire extinguishing effect, avoid leakage to form a thick water column to break the precursor, ensure that the spray range is sprayed from both ends to the middle in each process area, achieve full coverage, and avoid water spraying impact on key equipment in the process area, reduce the later maintenance cost, and avoid the impact of too many spray lines on the precursor, to ensure the safety of life and property to the greatest extent and reduce losses; and after the spraying is completed, the residual deionized water in the spray pipe can be discharged in time to prevent it from continuously forming large water droplets from the spray ball head in the furnace along the pipeline and dripping to cause impact, shorten the restart time and try to prevent residual water droplets from affecting the quality of the tow when starting the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of an oxidation furnace spray pipe system of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the spray branch and the mist branch of the utility model;

[0024] Figure 3 This is a schematic diagram of the installation structure of the spray branch circuit of the utility model;

[0025] Figure 4 This is a schematic diagram of the installation structure of the spray branch of the utility model;

[0026] Figure 5 This is a schematic diagram of the connection structure of the spray flange head of the utility model;

[0027] Figure 6 This is a schematic diagram of the connection structure of the spray head of the utility model.

[0028] Attached photos

[0029] 1. Ball valve, 2. Drain pipe, 3. Bracket, 4. Short-circuit flange, 5. Spray pipe, 6. Spray ball head assembly, 7. Spray main pipe, 8. Spray pipe, 9. Spray head, 10. Spray main pipe, 11. Bracket 2, 12. Bracket 3, 13. Water inlet pipe assembly;

[0030] 61. Spray flange head, 62. Flexible graphite composite gasket;

[0031] A. Top wall, B. Side wall. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that similar reference numerals denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

[0034] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] See also Figures 1 to 6 , this embodiment provides an oxidation furnace spray spray pipeline system.

[0038] An oxidation furnace spray pipe system, comprising a spray branch, a spray main pipe 7, a spray branch, a spray main pipe 10, and a water inlet pipe group 13;

[0039] A spray branch, the spray branch comprises a ball valve 1, a drain pipe 2, a short-circuit flange 4, a spray water pipe 5, and a spray ball head assembly 6. One end of the spray water pipe 5 is connected to the spray ball head assembly 6, and the other end of the spray water pipe 5 is connected to the short-circuit flange 4. The drain pipe 2 is connected to the bottom end of the short-circuit flange 4, and a ball valve 1 is arranged on the drain pipe 2;

[0040] The spray branch comprises a spray water pipe 8 and a spray head 9. One end of the spray water pipe 8 is connected to the spray head 9. Preferably, the spray water pipe and the spray head 9 are sealed by a pipe thread.

[0041] The water inlet pipe group 13 is connected to the spray main pipe 7 and the spray main pipe 10 respectively, the short-circuit flange 4 of the spray branch is connected to the spray main pipe 7, and the spray water pipe 8 of the spray branch is connected to the spray main pipe 10.

[0042] In further optimization of the above scheme, the spray ball head assembly 6 includes a spray flange head 61 and a flexible graphite composite gasket 62, and the flexible graphite composite gasket 62 is arranged between the spray flange head 61 and the spray water pipe 5. Because the furnace is at high temperature, especially in the event of a fire accident, the spray ball head assembly 6 is formed by a flexible graphite composite gasket 62 with good high temperature resistance and sealing performance and a spray flange head 61, and is tightly connected to the spray water pipe 5 through bolts.

[0043] In further optimization of the above scheme, at least one of the spray flange head 61 and the spray water pipe 5 is provided with a finely machined boss, which is tightly matched with the flexible graphite composite gasket 62 through bolts to achieve spray sealing. Preferably, both the spray flange head 61 and the spray water pipe 5 can be provided with a boss.

[0044] Another optimized implementation of the above solution is: the spray flange head 61 is a spherical spray flange head, and a spray hole is opened on the lower 1 / 4 of the sphere.

[0045] The third optimized implementation of the above scheme is: two groups of spray branches are set in each process zone of the carbon fiber oxidation furnace, and the two groups of spray branches are respectively set at the two ends of each process zone. The spray holes of the two spray flange heads 61 in the same process zone are arranged opposite to each other.

[0046] The fourth optimized implementation method of the above scheme is: the spray water pipe 5 and the spray water pipe 8 are pre-buried in the top wall A of the carbon fiber oxidation furnace, and one end extends into the process area of ​​the carbon fiber oxidation furnace and is connected to the spray ball head assembly 6 and the spray head 9 respectively.

[0047] The fifth optimized implementation of the above scheme is: it also includes bracket one 3, bracket two 11, and bracket three 12, wherein the bracket one 3 is fixed outside the side wall B of the carbon fiber oxidation furnace, the bracket one 3 is fixedly connected to the drain pipe 2, the bracket two 11 is fixed outside the side wall B of the carbon fiber oxidation furnace, the bracket three 12 is fixed on the ground, and the bracket two 11 is fixedly connected to the bracket three 12.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oxidation furnace spray pipe system, characterized in that: It includes a spray branch, a spray main (7), a spray branch, a spray main (10), and a water inlet pipe group (13); A spray branch circuit, the spray branch circuit comprising a ball valve (1), a drain pipe (2), a short-circuit flange (4), a spray pipe (5), and a spray ball head assembly (6); one end of the spray pipe (5) is connected to the spray ball head assembly (6); the other end of the spray pipe (5) is connected to the short-circuit flange (4); the drain pipe (2) is connected to the bottom end of the short-circuit flange (4); and the ball valve (1) is arranged on the drain pipe (2); A spray branch, the spray branch comprising a spray water pipe (8) and a spray head (9), one end of the spray water pipe (8) being connected to the spray head (9); The water inlet pipe group (13) is respectively connected to the spray main pipe (7) and the spray main pipe (10), the short-circuit flange (4) of the spray branch is connected to the spray main pipe (7), and the spray water pipe (8) of the spray branch is connected to the spray main pipe (10).

2. The oxidation furnace spray pipe system according to claim 1, characterized in that: The spray ball head assembly (6) comprises a spray flange head (61) and a flexible graphite composite gasket (62); the flexible graphite composite gasket (62) is arranged between the spray flange head (61) and the spray water pipe (5).

3. The oxidation furnace spray pipe system according to claim 2, characterized in that: At least one of the connection parts between the spray flange head (61) and the spray water pipe (5) is provided with a boss.

4. The oxidation furnace spray pipe system according to claim 2, characterized in that: The spray flange head (61) is a spherical spray flange head, and a spray hole is opened on the lower 1 / 4 of the spherical surface.

5. The oxidation furnace spray pipe system according to claim 4, characterized in that: Two groups of spray branches are arranged in each process zone of the carbon fiber oxidation furnace, and the two groups of spray branches are arranged at two ends of each process zone respectively.

6. The oxidation furnace spray pipe system according to claim 5, characterized in that: The spray holes of the two spray flange heads (61) in the same process area are arranged opposite to each other.

7. The oxidation furnace spray pipe system according to claim 1, characterized in that: The spray water pipe and the spray head (9) are sealed and connected via pipe threads.

8. The oxidation furnace spray pipe system according to claim 1, characterized in that: The spray water pipe (5) and the mist water pipe (8) are pre-buried in the top wall of the carbon fiber oxidation furnace, and one end thereof extends into the process area of ​​the carbon fiber oxidation furnace.

9. The oxidation furnace spray pipe system according to claim 1, characterized in that: It also includes a bracket one (3), wherein the bracket one (3) is fixed outside the side wall of the carbon fiber oxidation furnace, and the bracket one (3) is fixedly connected to the drain pipe (2).

10. The oxidation furnace spray pipe system according to claim 1, characterized in that: It also includes a second bracket (11) and a third bracket (12), wherein the second bracket (11) is fixed outside the side wall of the carbon fiber oxidation furnace, and the third bracket (12) is fixed on the ground, and the second bracket (11) and the third bracket (12) are fixedly connected.

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