Continuous production line of CMC product with fire-retardant function

Abstract

The application discloses a kind of CMC product continuous production line with flame-retardant function, including feeding mechanism, discharging mechanism and conveying mechanism;Conveying chain of conveying mechanism passes through detection heating cabin, break flame-retardant heating cabin, transition cabin and cooling cabin in turn;A plurality of workpiece mounting seat groups are provided on conveying chain, each workpiece mounting seat group includes several mounting seats;Nitrogen can be filled in detection heating cabin, and preheating can be carried out on the workpiece entering, while the porosity of workpiece can be detected;In break flame-retardant heating cabin, workpiece with excessive porosity can be broken and flame retardant can be added, and workpiece can be main heated in break flame-retardant heating cabin;Transition cabin is used to avoid nitrogen in break flame-retardant heating cabin from losing rapidly when workpiece passes through.This device can realize automatic detection, active break and flame-retardant injection, segmented temperature control and continuous operation, fundamentally reduce fire risk and improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of CMC workpiece production technology, and specifically to a continuous production line for CMC products with flame-retardant function. Background Technology

[0002] Ceramic matrix composites (CMCs) possess excellent properties such as high temperature resistance, oxidation resistance, and low density, and are widely used in aerospace, energy, and other fields. In the manufacturing process of CMC products, PMS (polymethylsilane) is typically used as a liquid precursor. After the workpiece is molded, it undergoes high-temperature treatment to obtain the final product. However, PMS is highly flammable during the heating process, especially when rising from room temperature to 300-400°C, and ignition often occurs without warning, posing a serious safety hazard to production. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a continuous production line for CMC products with flame-retardant function. This device can achieve automatic detection, active injection of flame retardant through cracks, segmented temperature control, and continuous operation, fundamentally reducing fire risk and improving production efficiency.

[0004] A continuous production line for CMC products with flame-retardant function includes a feeding mechanism, a discharging mechanism, and a conveying mechanism;

[0005] The feeding mechanism and the unloading mechanism are located on the front and rear sides of the conveying mechanism, respectively;

[0006] The conveying chain of the conveying mechanism passes sequentially through the detection heating chamber, the puncture flame-retardant heating chamber, the transition chamber, and the cooling chamber;

[0007] The conveyor chain is provided with multiple workpiece mounting seat groups, each workpiece mounting seat group including several mounting seats distributed in the left and right direction, the mounting seats being used to mount tooling with workpieces.

[0008] The testing chamber can be filled with nitrogen gas and can preheat the workpieces that enter, while also detecting the porosity of the workpieces.

[0009] The flame-retardant heating chamber can be used to break open workpieces with excessive porosity and add flame retardants. Nitrogen gas entering the testing heating chamber can enter the flame-retardant heating chamber, where the workpiece can be heated.

[0010] The transition chamber is used to prevent the rapid loss of nitrogen gas from the flame-retardant heating chamber when the workpiece passes through.

[0011] The cooling chamber is used to cool the workpiece.

[0012] Preferably, it also includes a nitrogen supply device, which is connected to the detection heating chamber. A nitrogen concentration detection sensor is installed in the detection heating chamber to detect the nitrogen concentration in the detection heating chamber.

[0013] Preferably, the testing heating chamber is equipped with a preheating device, which is capable of heating to a temperature of 80-100 degrees Celsius.

[0014] Preferably, the top wall of the heating chamber is provided with a porosity detection sensor group, each porosity detection sensor group having several ultrasonic sensors distributed in the left-right direction, and the number of ultrasonic sensors in the porosity detection sensor group corresponds to the number of mounting seats in the workpiece mounting seat group.

[0015] Preferably, the top wall of the rupture flame-retardant heating chamber is provided with a left and right drive module, which can drive the mounting frame to move left and right. The mounting frame is provided with two front and rear drive modules, and each of the two front and rear drive modules is connected to a mounting platform. The two front and rear drive modules can drive the two mounting platforms to move back and forth respectively. A rupture component and a flame retardant injection component are respectively installed on the two mounting platforms.

[0016] The top wall of the flame-retardant heating chamber has multiple through-hole groups distributed along the front-to-back direction. Each through-hole group includes multiple through-holes distributed along the left-to-right direction. The number of through-holes in the through-hole group corresponds to the number of mounting seats in the workpiece mounting seat group.

[0017] Preferably, the breaking assembly includes a lifting mechanism, a rotating mechanism connected to the output shaft of the lifting mechanism, a rotating mechanism connected to the output shaft of the rotating mechanism, the rotating mechanism being able to drive the rotating mechanism to rotate in a horizontal plane, and a circular blade connected to the output shaft of the rotating mechanism, the circular blade being arranged longitudinally, the rotating mechanism being able to drive the circular blade to rotate in a vertical plane.

[0018] Preferably, the flame retardant injection assembly includes a second lifting mechanism and a grouting pump. A grouting head is connected to the output shaft of the second lifting mechanism, and the grouting head is connected to the grouting pump through a grouting hose.

[0019] Preferably, the flame-retardant heating chamber with the breach is equipped with a main heating device, which is capable of heating to a temperature of over 300 degrees Celsius.

[0020] Preferably, it also includes a cold air generating device, which is connected to the cooling chamber and is used to supply cold air to the cooling chamber.

[0021] Preferably, a lifting door is provided at the front of the detection heating chamber, a lifting door is provided between the transition chamber and the breach flame-retardant heating chamber, a lifting door is provided between the cooling chamber and the transition chamber, and a lifting door is provided at the rear of the cooling chamber.

[0022] The beneficial effects of this invention are reflected in:

[0023] Continuous automated production: By connecting the various stages of feeding, inspection, flame retardant breaking, transition, cooling and unloading through a conveyor chain, continuous step-by-step operation is achieved, which greatly improves production efficiency and reduces manual intervention.

[0024] Active flame retardant protection: The detection heating chamber is filled with nitrogen to form an inert protection and preheated to 80-100℃; an ultrasonic sensor group is used to detect the porosity of each row of workpieces online. Workpieces exceeding the standard are automatically identified by the program and the row number is recorded. Subsequent breaking and flame retardant injection processes can be accurately located to avoid ineffective operations; the breaking flame retardant heating chamber automatically breaks open products with excessive porosity and injects flame retardant, while strictly controlling the heating rate (≤10℃ / min) and heating to above 300℃, effectively blocking oxygen and heat conduction channels, fundamentally preventing ignition.

[0025] Nitrogen stability control: The transition chamber, in conjunction with the lifting door assembly, effectively reduces the rapid and large-scale loss of nitrogen in the flame-retardant heating chamber during the workpiece discharge process, and maintains a stable nitrogen concentration in the flame-retardant heating chamber.

[0026] Flexible cutting and flame retardant injection mechanism: The left and right drive modules, front and rear drive modules and lifting mechanism work together to achieve precise operation of the blade and injection head on the workpiece at any position; the circular blade can be flexibly adjusted in the horizontal direction to form multiple staggered holes on the cut product, thereby blocking the oxygen and heat conduction channels from the front and rear direction and the left and right direction, further improving the flame retardant effect. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the overall structure of the flame-retardant heating chamber removed from the breach in this invention;

[0030] Figure 3 This is a schematic diagram of the tooling and workpiece in this invention.

[0031] In the attached diagram, 1-feeding mechanism, 2-inspection heating chamber, 3-fracture flame-retardant heating chamber, 4-transition chamber, 5-cooling chamber, 6-unloading mechanism, 7-conveyor chain, 8-mounting seat, 9-workpiece, 10-lifting door one, 11-lifting door two, 12-lifting door three, 13-lifting door four;

[0032] 31-Left and right drive modules, 32-Mounting bracket, 33-Front and rear drive modules, 34-Mounting platform, 35-Break assembly, 36-Flame retardant injection assembly, 37-Through hole. Detailed Implementation

[0033] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0034] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0035] Example 1

[0036] like Figures 1-2 As shown, this embodiment provides a continuous production line for CMC products with flame-retardant function, including a feeding mechanism 1, a discharging mechanism 6, and a conveying mechanism;

[0037] The feeding mechanism 1 and the unloading mechanism 6 are located on the front and rear sides of the conveying mechanism, respectively;

[0038] The conveying chain 7 of the conveying mechanism passes sequentially through the detection heating chamber 2, the puncture flame-retardant heating chamber 3, the transition chamber 4, and the cooling chamber 5;

[0039] The conveyor chain 7 is provided with multiple workpiece mounting seat groups, each workpiece mounting seat group including several mounting seats 8 distributed in the left and right direction, the mounting seats 8 being used to mount tooling with workpieces 9.

[0040] The heating chamber 2 can be filled with nitrogen and can preheat the workpiece 9 that enters it, while also detecting the porosity of the workpiece 9.

[0041] The workpiece 9 with excessive porosity can be broken and flame retardant can be added in the flame retardant heating chamber 3. Nitrogen gas that enters the detection heating chamber 2 can enter the flame retardant heating chamber 3, and the workpiece 9 can be heated in the flame retardant heating chamber 3.

[0042] The transition chamber 4 is used to prevent the rapid loss of nitrogen gas in the flame-retardant heating chamber 3 when the workpiece 9 passes through.

[0043] The cooling chamber 5 is used to cool the workpiece 9.

[0044] This embodiment also includes a nitrogen supply device, which is connected to the detection heating chamber 2. A nitrogen concentration detection sensor is installed inside the detection heating chamber 2 to detect the nitrogen concentration inside the chamber. Specifically, the nitrogen concentration detection sensor detects the nitrogen concentration and feeds it back to the control system in real time. The control system controls the nitrogen supply device to maintain the nitrogen concentration.

[0045] In this embodiment, the detection heating chamber 2 is equipped with a preheating device, which can heat the temperature to 80-100 degrees Celsius. In this embodiment, the preheating temperature is 80-100 degrees Celsius.

[0046] In this embodiment, a porosity detection sensor group is provided on the top wall of the detection heating chamber 2. Each porosity detection sensor group has several ultrasonic sensors distributed in the left-right direction. The number of ultrasonic sensors in the porosity detection sensor group corresponds to the number of mounting seats 8 in the workpiece mounting seat group. Specifically, three mounting seats 8 are provided in the workpiece mounting seat group, and three ultrasonic sensors are set accordingly.

[0047] This embodiment also includes a cold air generating device, which is connected to the cooling chamber 5 and is used to supply cold air to the cooling chamber 5.

[0048] In this embodiment, a lifting door 10 is provided on the front side of the detection heating chamber 2, a lifting door 2 11 is provided between the transition chamber 4 and the breach flame-retardant heating chamber 3, a lifting door 3 12 is provided between the cooling chamber 5 and the transition chamber 4, and a lifting door 4 13 is provided on the rear side of the cooling chamber 5. These are used to coordinate the operation of each chamber.

[0049] The specific working principle is as follows: The loading mechanism 1 and the unloading mechanism 6 are preferably robotic arms. The loading mechanism 1 places the tooling with workpieces 9 onto each mounting seat 8 in sequence. The conveyor chain 7 advances step by step, so that each row of workpieces 9 enters each compartment in sequence.

[0050] The testing heating chamber 2 is connected to a nitrogen supply device to supply nitrogen to both the testing heating chamber 2 and the breach flame-retardant heating chamber 3. A nitrogen concentration sensor is installed inside the chamber to maintain the nitrogen concentration. The testing heating chamber 2 is equipped with a preheating device that can heat the chamber temperature to 80-100℃ to preheat the workpiece 9 while preventing rapid temperature increases that could lead to ignition. A porosity detection sensor group is installed on the top wall of the testing heating chamber 2; each sensor group contains multiple ultrasonic sensors, totaling three. When the workpiece 9 arrives at the testing heating chamber 2, the lifting door 10 closes, nitrogen is introduced for preheating, and the ultrasonic sensors detect the porosity of the workpiece 9. A preset porosity threshold (e.g., >15% is considered excessive) is set, and the positions of workpieces 9 exceeding the threshold are automatically recorded and numbered by the control system. Workpieces with normal porosity are automatically released.

[0051] After the inspection is completed, the conveyor chain 7 advances one station, allowing the row of workpieces 9 to enter the flame-retardant heating chamber 3. This process is repeated until the flame-retardant heating chamber 3 is full of workpieces 9. Based on the records of the substandard workpieces 9 recorded by the control system, the substandard workpieces 9 are broken open. After breaking, flame retardant is injected for flame retardancy. Then, the main heating device performs high-temperature treatment at over 300 degrees Celsius as set, maintaining it for 4 hours to allow the flame retardant to fully impregnate and solidify.

[0052] Specifically, after workpiece 9 is processed in the flame-retardant heating chamber 3, it needs to pass through the transition chamber 4 into the cooling chamber 5 for cooling. During this process, the second lifting door 11 is opened and the third lifting door 12 is closed, allowing a row of workpieces 9 to enter the transition chamber 4. Then, the second lifting door 11 is closed and the third lifting door 12 is opened, allowing the row of workpieces to enter the cooling chamber 5. This sequential process prevents a large and rapid loss of nitrogen during the process of workpiece 9 exiting the flame-retardant heating chamber 3, which could prevent the nitrogen supply device from replenishing the nitrogen to the appropriate concentration and cause workpiece 9 to suddenly ignite.

[0053] Example 2

[0054] This embodiment further illustrates the previous embodiment: The top wall of the flame-retardant heating chamber 3 with the breach is provided with a left and right drive module 31. The left and right drive module 31 can drive the mounting frame 32 to move left and right. The mounting frame 32 is provided with two front and rear drive modules 33. Each of the two front and rear drive modules 33 is connected to a mounting platform 34. The two front and rear drive modules 33 can drive the two mounting platforms 34 to move back and forth respectively. The two mounting platforms 34 are respectively equipped with a breach component 35 and a flame retardant injection component 36.

[0055] The top wall of the flame-retardant heating chamber 3 has multiple through-hole groups distributed along the front-back direction. Each through-hole group includes multiple through-holes 37 distributed along the left-right direction. The number of through-holes 37 in the through-hole group corresponds to the number of mounting seats 8 in the workpiece mounting seat group.

[0056] In this embodiment, the breaking assembly 35 includes a lifting mechanism, a rotating mechanism connected to the output shaft of the lifting mechanism, a rotating mechanism connected to the output shaft of the rotating mechanism, the rotating mechanism being able to drive the rotating mechanism to rotate in a horizontal plane, and a circular blade connected to the output shaft of the rotating mechanism, the circular blade being arranged longitudinally, the rotating mechanism being able to drive the circular blade to rotate in a vertical plane.

[0057] In this embodiment, the flame retardant injection assembly 36 includes a second lifting mechanism and a grouting pump. A grouting head is connected to the output shaft of the second lifting mechanism, and the grouting head is connected to the grouting pump through a grouting hose.

[0058] In this embodiment, the flame-retardant heating chamber 3 with the breach is equipped with a main heating device, which can heat the temperature to over 300 degrees Celsius.

[0059] The specific breaching and grouting process is as follows:

[0060] The flame-retardant heating chamber 3 is equipped with a main heating device that can heat the temperature to above 300℃ (e.g., 300-400℃), and the heating rate is strictly controlled at ≤10℃ / min, using a uniform heating mode. The top wall of the flame-retardant heating chamber 3 is equipped with left and right drive modules 31, which drive the mounting frame 32 to move left and right. The mounting frame 32 is equipped with two front and rear drive modules 33, each connected to a mounting platform 34, which respectively mounts the breaking component 35 and the flame-retardant injection component 36. The top wall of the flame-retardant heating chamber 3 has multiple through-hole groups distributed along the front-rear direction. Each through-hole group includes multiple through-holes 37 distributed along the left-right direction, with a total of three through-holes 37, allowing the breaking component 35 and the flame-retardant injection component 36 to pass through the through-holes 37 to operate on the workpiece 9.

[0061] Based on the location of the workpiece with excessive porosity recorded by the control system, the left and right drive modules 31 and the front and rear drive modules 33 move the breaking assembly 35 above the target workpiece. The breaking assembly 35 includes a lifting mechanism, the output shaft of which is connected to a rotating mechanism. The output shaft of the rotating mechanism is connected to a rotating mechanism, and the output shaft of the rotating mechanism is connected to a circular blade, which is arranged longitudinally.

[0062] During operation, the lifting mechanism lowers the blade, while the rotating mechanism rotates the blade to the desired angle in the horizontal plane. The rotating mechanism then drives the blade to rotate at high speed in the vertical plane, creating a grout injection hole in workpiece 9. Because the blade can rotate in the horizontal plane, multiple grouting operations can create multiple injection holes. Figure 3 The staggered arrangement of grouting holes cuts off gaps in the front-to-back and left-to-right directions. After the breach is completed, the breaching assembly 35 resets, and the flame retardant injection assembly 36 moves above the same workpiece 9. The flame retardant injection assembly 36 includes a lifting mechanism two and a grouting pump. The output shaft of the lifting mechanism two is connected to the grouting head, which is connected to the grouting pump via a hose. The grouting pump injects a quantitative amount of the flame retardant mixture (a mixture of phosphorus-based flame retardant, nano-reinforcing agent, and silicon carbide slurry) into the grouting hole to block heat conduction and oxygen pathways. Then, the main heating device performs high-temperature treatment at the set temperature for 4 hours to allow the flame retardant to fully impregnate and solidify.

[0063] It should be noted that the arrangement of through holes 37 will release nitrogen gas. During this process, the nitrogen supply device will continuously replenish nitrogen gas to maintain the nitrogen concentration in the breach flame-retardant heating chamber 3.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A continuous production line for CMC products with flame-retardant function, characterized in that, It includes a feeding mechanism (1), a discharging mechanism (6), and a conveying mechanism; The feeding mechanism (1) and the unloading mechanism (6) are located on the front and rear sides of the conveying mechanism, respectively; The conveying chain (7) of the conveying mechanism passes through the detection heating chamber (2), the puncture flame-retardant heating chamber (3), the transition chamber (4) and the cooling chamber (5) in sequence. The conveyor chain (7) is provided with multiple workpiece mounting base groups, each workpiece mounting base group including several mounting bases (8) distributed in the left and right directions, the mounting bases (8) being used to mount tooling with workpieces (9). The heating chamber (2) can be filled with nitrogen and can preheat the workpiece (9) that enters it, while also detecting the porosity of the workpiece (9). The workpiece (9) with excessive porosity can be broken and flame retardant can be added in the broken flame retardant heating chamber (3). Nitrogen gas entering the detection heating chamber (2) can enter the broken flame retardant heating chamber (3). The workpiece (9) can be mainly heated in the broken flame retardant heating chamber (3). The transition chamber (4) is used to prevent the nitrogen in the flame-retardant heating chamber (3) from being lost rapidly when the workpiece (9) passes through it; The cooling chamber (5) is used to cool the workpiece (9).

2. The continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, It also includes a nitrogen supply device, which is connected to the detection heating chamber (2). A nitrogen concentration detection sensor is installed in the detection heating chamber (2) to detect the nitrogen concentration in the detection heating chamber (2).

3. A continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, The detection heating chamber (2) is equipped with a preheating device, which can heat the temperature to 80-100 degrees.

4. A continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, The inner top wall of the detection heating chamber (2) is provided with a porosity detection sensor group. Each porosity detection sensor group has several ultrasonic sensors distributed in the left and right directions. The number of ultrasonic sensors in the porosity detection sensor group corresponds to the number of mounting seats (8) in the workpiece mounting seat group.

5. A continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, The top wall of the rupture flame-retardant heating chamber (3) is provided with a left and right drive module (31). The left and right drive module (31) can drive the mounting frame (32) to move left and right. The mounting frame (32) is provided with two front and rear drive modules (33). Each of the two front and rear drive modules (33) is connected to a mounting platform (34). The two front and rear drive modules (33) can drive the two mounting platforms (34) to move back and forth respectively. The two mounting platforms (34) are respectively equipped with a rupture component (35) and a flame retardant injection component (36). The top wall of the flame-retardant heating chamber (3) has multiple through-hole groups distributed in the front-back direction. Each through-hole group includes multiple through-holes (37) distributed in the left-right direction. The number of through-holes (37) in the through-hole group corresponds to the number of mounting seats (8) in the workpiece mounting seat group.

6. A continuous production line for CMC products with flame-retardant function according to claim 5, characterized in that, The breaking assembly (35) includes a lifting mechanism, a rotating mechanism connected to the output shaft of the lifting mechanism, a rotating mechanism connected to the output shaft of the rotating mechanism, the rotating mechanism being able to drive the rotating mechanism to rotate in the horizontal plane, a circular blade connected to the output shaft of the rotating mechanism, the circular blade being arranged longitudinally, and the rotating mechanism being able to drive the circular blade to rotate in the vertical plane.

7. A continuous production line for CMC products with flame-retardant function according to claim 5, characterized in that, The flame retardant injection assembly (36) includes a second lifting mechanism and a grouting pump. A grouting head is connected to the output shaft of the second lifting mechanism, and the grouting head is connected to the grouting pump through a grouting hose.

8. A continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, The flame-retardant heating chamber (3) with the breach is equipped with a main heating device, which can heat the temperature to over 300 degrees.

9. A continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, It also includes a cold air generating device, which is connected to the cooling chamber (5) and is used to supply cold air to the cooling chamber (5).

10. A continuous production line for CMC products with flame-retardant function according to claim 1, characterized in that, The front of the detection heating chamber (2) is provided with a lifting door (10), the transition chamber (4) is provided with a lifting door (2) (11) between the transition chamber (4) and the breach flame-retardant heating chamber (3), the cooling chamber (5) is provided with a lifting door (3) (12), and the rear of the cooling chamber (5) is provided with a lifting door (4) (13).

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