Online infrared detection device and method for interface reaction process of composite solid propellant slurry and lining

Abstract

The invention provides an online infrared detection device and method for the interface reaction process of composite solid propellant slurry and a lining layer. The device is characterized by comprising an adjustable optical fiber fixing seat (10), an optical fiber sensor positioning device (20) and a sample sealing device (30), the adjustable optical fiber fixing seat (10) is supported right above the sample sealing device (30) and is provided with supporting legs and a table board with a through hole, the optical fiber sensor positioning device (20) is of a cylindrical structure, the top of the optical fiber sensor positioning device (20) is fixed on a platform, and the sample sealing device (30) is fixed on the platform. The bottom of the optical fiber sensor (201) penetrates through the through hole of the optical fiber sensor positioning device (20) and extends into the sample sealing device (30), a to-be-tested sample is placed in the sample sealing device (30), and the optical fiber sensor (201) penetrates through the optical fiber sensor positioning device (20) and is in contact with the to-be-tested sample during testing to obtain an infrared spectrogram. The device is simple in structure and rapid to operate, and provides support for monitoring the change condition of the solid propellant in the curing reaction process.

Description

Technical Field

[0001] The invention relates to the field of composite solid propellant performance testing, and in particular to an online infrared detection device and method for a composite solid propellant slurry and lining interface reaction process. Background Art

[0002] As a power plant for missiles and spacecraft, solid motors have specific technical requirements. The main requirements are to ensure the structural integrity of the grain-liner-insulation layer-shell, the precise adjustment and control of the burning rate of the propellant grain, and the energy characteristics, mechanical properties and storage performance of the grain.

[0003] The liner is a transition layer that achieves the bonding between the insulation layer and the propellant. The interface is required to be firmly bonded, and its bonding strength can still meet the design requirements after long-term storage, without debonding and interface effect. The study of the physical and chemical mechanism of debonding failure at the propellant-liner interface is an important part of the study of the failure mechanism of rocket engine charges. The debonding problem at the interface of solid engine charges is one of the outstanding shortcomings that seriously affects the life and safety of missiles. Once the interface debonds, it cannot be repaired. In severe cases, it may cause an explosion when the engine is ignited, affecting the reliability and development progress of missile weapons.

[0004] Since a basic condition for the bonding of the propellant and the liner is that the propellant must first infiltrate the semi-cured liner matrix before bonding, and then the propellant is poured onto the semi-cured liner, there is currently no way to detect the reaction process of the interface between the semi-cured liner and the propellant slurry. Therefore, there is an urgent need for a device and method for online detection of the propellant liner interface, which can conveniently and quickly monitor the reaction process of the interface between the propellant slurry and the semi-cured liner. Summary of the invention

[0005] In order to solve the problem that the curing agent content at the interface between the propellant slurry and the semi-cured lining in the composite solid propellant cannot be monitored, the present invention provides an online detection device for the interface between the composite solid propellant slurry and the lining and an online infrared detection method for the interface between the composite solid propellant slurry and the lining, which can quickly monitor the reaction between the semi-cured lining and the propellant slurry during the curing process.

[0006] The technical solution provided by the present invention is as follows:

[0007] In a first aspect, an online infrared detection device for the interface reaction process between a composite solid propellant slurry and a lining layer is provided, characterized in that it comprises an adjustable optical fiber fixing seat (10), an optical fiber sensor positioning device (20), and a sample sealing device (30). The adjustable optical fiber fixing seat (10) is supported directly above the sample sealing device (30), and has supporting legs and a table with a through hole. The optical fiber sensor positioning device (20) is a columnar structure, with a top fixed to the platform, and a bottom passing through the through hole of the optical fiber sensor positioning device (20) and probing into the interior of the sample sealing device (30). A sample to be tested is placed in the sample sealing device (30), and an optical fiber sensor (201) is inserted into the optical fiber sensor positioning device (20) and contacts the sample to be tested during testing to obtain an infrared spectrum of the interface of the sample to be tested.

[0008] Furthermore, the adjustable optical fiber fixing seat (10) comprises a height adjustment frame (101) and a fixing frame (102); the height adjustment frame (101) is connected to the upper side of the fixing frame (102) at a through hole by means of threads, and the height of the optical fiber sensor can be adjusted by rotating the height adjustment frame (101).

[0009] Furthermore, the optical fiber sensor positioning device (20) comprises a sealing shell (202), a spring (203), a pressure plate (204), a retaining spring (205), a torsion spring assembly (206), a sealing plug (207), and a sealing ring (208); the pressure plate (204) is fixedly connected to the spring (203) and installed inside the sealing shell (202); the pressure plate (204) extends out of the sealing shell (202) from the side; the sealing plug (207) is a sealing plug structure with an external torsion bar; a sealing ring (208) is installed on the sealing plug (207); one end of the sealing plug (207) is installed at the bottom of the sealing shell (202); and the other end is fixed to the outside of the sealing shell (202) by the retaining spring (205) and the torsion spring assembly (206);

[0010] When working, the torsion spring assembly (206) is twisted to give the sealing plug (207) kinetic energy for lateral movement, the optical fiber sensor (201) reaches a specified position, and the pressing plate (204) is pressed downward to push the sealing plug (207) out of the sealing housing (202). Under the action of the torsion spring assembly (206), the sealing plug (207) moves lateraly, so that the optical fiber sensor contacts the sample to be tested.

[0011] Furthermore, the torsion spring assembly (206) is fixedly connected to the side of the sealing shell (202) by welding.

[0012] Furthermore, after the cylindrical rod of the sealing plug (207) passes through the torsion spring assembly (206) welded on the sealing shell (202), it is limited by two retaining springs (205).

[0013] Furthermore, the sample sealing device (30) comprises a cover plate (301), a plugging piece (302), and a sample groove (303). The sample sealing device (30) is a sealed groove body. After the sample to be tested is placed in the sample groove (303), and the upper end is extended into the optical fiber sensor, the sealing of the cavity is achieved by the cover plate (301) and the plugging piece (302).

[0014] Furthermore, the optical fiber sensor (201) is connected to an infrared spectrometer to obtain an infrared spectrum of the interface after contacting the interface.

[0015] In a second aspect, an online infrared detection method for the interface reaction process between a composite solid propellant slurry and a liner is provided, characterized in that it uses the online infrared detection device for the interface reaction process between a composite solid propellant slurry and a liner according to any one of claims 1 to 7, comprising the following steps:

[0016] Prepare a sample to be tested, wherein the sample to be tested includes a semi-cured lining layer brushed on a thermal insulation layer and a propellant slurry poured therein;

[0017] Putting the sample to be tested into the sample sealing device (30);

[0018] The optical fiber sensor positioning device (20) is installed into the through hole of the adjustable optical fiber fixing seat (10), and the optical fiber sensor positioning device (20) is inserted into the interior of the sample sealing device (30);

[0019] The optical fiber sensor (201) is brought into contact with the sample to be tested and the test is started.

[0020] Furthermore, after the adjustable optical fiber fixing seat (10) is supported directly above the sample sealing device (30), the height of the height adjustment frame (101) is adjusted, and then the optical fiber sensor positioning device (20) is installed into the through hole of the adjustable optical fiber fixing seat (10).

[0021] Furthermore, when the test starts, the optical fiber sensor (201) is located at the interface between the propellant slurry and the semi-cured lining.

[0022] The online infrared detection device and method for the interface reaction process of the composite solid propellant slurry and the liner of the present invention can be used for online detection of the interface when both the propellant and the liner are not solidified. It has the characteristics of novel design, simple structure, fast operation and high testing efficiency. It provides a new possibility for the interface testing of the propellant liner and provides method support for monitoring the changes of the solid propellant during the curing reaction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an online infrared detection device for the interface reaction process between composite solid propellant slurry and liner of the present invention;

[0024] Figure 2 It is a structural schematic diagram of an adjustable optical fiber fixing seat;

[0025] Figure 3 It is a structural schematic diagram of the optical fiber sensor positioning device;

[0026] Figure 4 Schematic diagram of the structure of the sample sealing device. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0028] Figure 1 The structure diagram of the online infrared detection device for the interface reaction process between the composite solid propellant slurry and the liner of the present invention is shown in FIG. Figure 1 As shown, in one embodiment, the device for online detection of the interface between composite solid propellant slurry and lining layer of the present invention may include an adjustable optical fiber fixing seat 10, an optical fiber sensor positioning device 20, and a sample sealing device 30. The adjustable optical fiber fixing seat 10 is supported directly above the sample sealing device 30, and has supporting legs and a table with through holes. The optical fiber sensor positioning device 20 is a columnar structure, with the top fixed to the platform, and the bottom passing through the through hole of the optical fiber sensor positioning device 20 and probing into the interior of the sample sealing device 30. The sample to be tested is placed in the sample sealing device 30, and the optical fiber sensor 201 is penetrated in the optical fiber sensor positioning device 20, and contacts with the sample to be tested during testing to obtain an infrared spectrum of the interface of the sample to be tested.

[0029] Figure 2 Figure 1 is a schematic diagram of an adjustable optical fiber holder. Figure 2 As shown, the adjustable optical fiber fixing seat 10 includes a height adjustment frame 101 and a fixing frame 102 . The height adjustment frame 101 is connected to the upper side of the fixing frame 102 through a thread at a through hole. The height of the optical fiber sensor can be adjusted by rotating the height adjustment frame 101 .

[0030] Before testing, after the adjustable optical fiber fixing seat 10 is supported to the top of the sample sealing device 30, the height of the height adjustment frame 101 is adjusted, and the optical fiber sensor positioning device 20 is installed into the through hole of the adjustable optical fiber fixing seat 10, and the optical fiber sensor positioning device 20 is inserted into the sample sealing device 30. The brim structure on the upper side of the optical fiber sensor positioning device 20 is placed above the platform of the height adjustment frame 101.

[0031] Figure 3 Figure 1 is a schematic diagram of the optical fiber sensor positioning device. Figure 3As shown, the optical fiber sensor positioning device 20 includes an optical fiber sensor 201, a sealed housing 202, a spring 203, a pressure plate 204, a spring clip 205, a torsion spring assembly 206, a sealing plug 207, and a sealing ring 208. The pressure plate 204 is fixedly connected to the spring 203 and installed inside the sealed housing 202 as shown in the figure, and the pressure plate 204 extends out of the sealed housing 202 from the side. The sealing plug 207 is a sealing plug structure with an external torsion bar, and a sealing ring 208 is installed on the sealing plug 207. One end of the sealing plug 207 is installed at the bottom of the sealed housing 202, and the other end is fixed to the outside of the sealed housing 202 by the spring clip 205 and the torsion spring assembly 206, wherein the torsion spring assembly 206 is fixedly connected to the side of the sealed housing 202 by welding.

[0032] During installation, the sealing plug 207 with the sealing ring 208 is installed into the sealing housing 202, and the cylindrical rod of the sealing plug 207 passes through the torsion spring assembly 206 welded on the sealing housing 202, and is limited by two retaining springs 205. Then, the optical fiber sensor 201 is installed into the sealing housing 202, and then the pressure plate 204 and retaining spring 205 assembly are installed into the sealing housing 202. The optical fiber sensor is installed from the upper end surface of the sealing housing 202.

[0033] Figure 4 Figure 1 is a schematic diagram of the sample sealing device. Figure 4 As shown, the sample sealing device 30 comprises a cover plate 301, a plugging piece 302, and a sample groove 303. The sample sealing device 30 is a sealed groove body, and after the upper end is inserted into the optical fiber sensor, the cover plate 301 cooperates with the plugging piece 302 to achieve sealing in the cavity.

[0034] When in use, the sample to be tested is placed in the sample slot 303 , and then the cover plate 301 is installed on top of the sample slot 303 to seal it.

[0035] By using the above-mentioned device for online detection of the interface between composite solid propellant slurry and liner, the present invention also provides an online infrared detection method for the interface between composite solid propellant slurry and liner, comprising the following steps:

[0036] Prepare a sample to be tested, wherein the sample to be tested includes a semi-cured lining layer brushed on a thermal insulation layer and a propellant slurry poured therein;

[0037] Place the sample to be tested into the sample sealing device 30;

[0038] Install the optical fiber sensor positioning device 20 into the through hole of the adjustable optical fiber fixing seat 10, and allow the optical fiber sensor positioning device 20 to probe into the interior of the sample sealing device 30;

[0039] The optical fiber sensor 201 is brought into contact with the sample to be tested and the test is started.

[0040] Specifically, the sample to be tested is placed in the sample sealing device 30, and the torsion spring assembly 206 is twisted to give the sealing plug 207 the kinetic energy to move laterally. The optical fiber sensor 201 reaches the specified position, and the pressure plate 204 is pressed down to push the sealing plug 207 out of the sealing shell 202. Under the action of the torsion spring assembly 206, the sealing plug 207 moves laterally, so that the optical fiber sensor 201 contacts the sample to be tested.

[0041] Example 1

[0042] Before testing, the sealing plug 207 of the sealing ring 208 is installed in the sealing housing 202 , the optical fiber sensor is installed in the sealing housing 202 , and the pressure plate 204 and the retaining spring 205 assembly is installed in the sealing housing 202 .

[0043] During the test, the sample to be tested is placed in the sample slot 303, and the cover plate 301 is installed and sealed on the sample slot 303. The sample to be tested includes a semi-cured lining layer brushed on the insulation layer and poured with propellant slurry.

[0044] The height adjustment frame 101 is screwed onto the fixing frame 102 through threads. After the adjustable optical fiber fixing seat 10 is supported directly above the sample sealing device 30, the height of the height adjustment frame 101 is adjusted according to the sample to be tested, and the optical fiber sensor positioning device 20 is installed into the through hole of the adjustable optical fiber fixing seat 10, and the optical fiber sensor positioning device 20 is inserted into the sample sealing device 30. The torsion spring assembly 206 is twisted to give the sealing plug 207 the kinetic energy to move laterally. When the optical fiber sensor reaches the specified position, the pressing plate 204 is pressed down to push the sealing plug 207 out of the sealing housing 202. Under the action of the torsion spring assembly 206, the sealing plug 207 moves laterally, so that the optical fiber sensor contacts the sample to be tested, and the infrared spectrum of the interface of the sample to be tested is obtained by testing.

[0045] The designated position reached by the optical fiber sensor 201 refers to the position where the optical fiber sensor 201 reaches the interface between the propellant slurry and the semi-cured lining. The optical fiber sensor is connected to an infrared spectrometer, and after contacting the interface, an infrared spectrum of the interface can be obtained.

[0046] It should be noted that the above is only an illustrative description and explanation of the present invention, and those skilled in the art should understand that any modification and replacement of the present invention belongs to the protection scope of the present invention.

Claims

1. An online infrared detection device for the interface reaction process between composite solid propellant slurry and liner, characterized in that: The invention comprises an adjustable optical fiber fixing seat (10), an optical fiber sensor positioning device (20), and a sample sealing device (30). The adjustable optical fiber fixing seat (10) is supported directly above the sample sealing device (30) and has supporting legs and a table with a through hole. The optical fiber sensor positioning device (20) is a columnar structure, with a top fixed to the platform and a bottom passing through the through hole of the optical fiber sensor positioning device (20) and probing into the interior of the sample sealing device (30). The sample to be tested is placed in the sample sealing device (30). The optical fiber sensor (201) is arranged in the optical fiber sensor positioning device (20) and contacts the sample to be tested during testing to obtain an infrared spectrum diagram of the interface of the sample to be tested.

2. The on-line infrared detection device for the interface reaction process between composite solid propellant slurry and liner according to claim 1 is characterized in that: The adjustable optical fiber fixing seat (10) comprises a height adjustment frame (101) and a fixing frame (102); the height adjustment frame (101) is connected to the upper side of the fixing frame (102) at a through hole by means of threads; and the height of the optical fiber sensor can be adjusted by rotating the height adjustment frame (101).

3. The on-line infrared detection device for the interface reaction process between composite solid propellant slurry and liner according to claim 1 is characterized in that: The optical fiber sensor positioning device (20) comprises a sealing housing (202), a spring (203), a pressure plate (204), a retaining spring (205), a torsion spring assembly (206), a sealing plug (207), and a sealing ring (208). The pressure plate (204) is fixedly connected to the spring (203) and installed inside the sealing housing (202). The pressure plate (204) extends out of the sealing housing (202) from the side. The sealing plug (207) is a sealing plug structure with an external torsion bar. The sealing ring (208) is installed on the sealing plug (207). One end of the sealing plug (207) is installed at the bottom of the sealing housing (202), and the other end is fixed to the outside of the sealing housing (202) by the retaining spring (205) and the torsion spring assembly (206). When working, the torsion spring assembly (206) is twisted to give the sealing plug (207) kinetic energy for lateral movement, the optical fiber sensor (201) reaches a specified position, and the pressing plate (204) is pressed downward to push the sealing plug (207) out of the sealing housing (202). Under the action of the torsion spring assembly (206), the sealing plug (207) moves lateraly, so that the optical fiber sensor contacts the sample to be tested.

4. The on-line infrared detection device for the interface reaction process between composite solid propellant slurry and liner according to claim 4 is characterized in that: The torsion spring assembly (206) is fixedly connected to the side of the sealing housing (202) by welding.

5. The on-line infrared detection device for the interface reaction process between composite solid propellant slurry and liner according to claim 4 is characterized in that: After the cylindrical rod of the sealing plug (207) passes through the torsion spring assembly (206) welded to the sealing housing (202), it is limited by two retaining springs (205).

6. The on-line infrared detection device for the interface reaction process of composite solid propellant slurry and liner according to claim 1 is characterized in that: The sample sealing device (30) comprises a cover plate (301), a plugging piece (302), and a sample groove (303). The sample sealing device (30) is a sealed groove body. After the sample to be tested is placed in the sample groove (303), the upper end is extended into the optical fiber sensor, and the sealing of the cavity is achieved by the cover plate (301) and the plugging piece (302).

7. The on-line infrared detection device for the interface reaction process of composite solid propellant slurry and liner according to claim 1 is characterized in that: The optical fiber sensor (201) is connected to an infrared spectrometer and obtains an infrared spectrum of the interface after contacting the interface.

8. An online infrared detection method for the interface reaction process between composite solid propellant slurry and liner, characterized in that: The online infrared detection device for the interface reaction process between the composite solid propellant slurry and the liner according to any one of claims 1 to 7 comprises the following steps: Prepare a sample to be tested, wherein the sample to be tested includes a semi-cured lining layer brushed on a thermal insulation layer and a propellant slurry poured therein; Putting the sample to be tested into the sample sealing device (30); The optical fiber sensor positioning device (20) is installed into the through hole of the adjustable optical fiber fixing seat (10), and the optical fiber sensor positioning device (20) is inserted into the interior of the sample sealing device (30); The optical fiber sensor (201) is brought into contact with the sample to be tested and the test is started.

9. The online infrared detection method for the interface reaction process between composite solid propellant slurry and liner according to claim 8 is characterized in that: After the adjustable optical fiber fixing seat (10) is supported directly above the sample sealing device (30), the height of the height adjustment frame (101) is adjusted, and then the optical fiber sensor positioning device (20) is installed into the through hole of the adjustable optical fiber fixing seat (10).

10. The online infrared detection method for the interface reaction process between composite solid propellant slurry and liner according to claim 8 is characterized in that: When the test starts, the optical fiber sensor (201) is located at the interface between the propellant slurry and the semi-cured lining.

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