Jet pipe hydraulic inspection and bursting test tool

Abstract

The utility model provides a hydraulic inspection and bursting test tool for a spray pipe. The hydraulic inspection and bursting test tool comprises a front sealing head, a rear sealing head and a supporting tool, the front end socket and the rear end socket are connected with the two ends of the spray pipe shell correspondingly. A sealing structure is arranged at the joint of the front seal head and the rear seal head with the spray pipe shell; the supporting tool is arranged in the spray pipe shell and is supported on the inner wall of the connecting end of the spray pipe shell and the front sealing head or the rear sealing head; the spray pipe shell is provided with a spray pipe shell cavity; and the front end socket is provided with a front end socket through hole communicated with the cavity of the spray pipe shell. The test tool is simple in structure, easy to disassemble, reliable in connection and suitable for the hydraulic test of the spray pipe shell under specific conditions, large strain of the sealing face of the spray pipe shell after the hydraulic test is avoided, and the sealing reliability of the sealing face of the spray pipe shell is improved.

Description

Technical Field

[0001] The present application relates to the technical field of test devices, and in particular to a nozzle hydraulic inspection and blasting test tool. Background Art

[0002] A solid rocket engine primarily consists of a combustion chamber (primarily consisting of the combustion chamber casing and solid propellant), a nozzle assembly, and an ignition device. The nozzle is a crucial component of the engine's thrust vector control system, and its design is crucial to engine performance. As the primary load-bearing structure of the nozzle, the nozzle casing must withstand the impact of high-temperature, high-pressure combustion gases and the complex mechanical environment. Therefore, its strength and stability are crucial to ensuring proper engine operation.

[0003] To verify the strength and sealing performance of the nozzle housing, a hydraulic test is typically required. This test simulates actual operating conditions by injecting high-pressure liquid into the nozzle housing. During the test, parameters such as housing deformation, leakage, and pressure changes can be observed and recorded, thereby assessing whether the housing's strength and sealing performance meet design requirements.

[0004] Typical solid rocket engine nozzle shell strength hydraulic test fixtures include hydraulic head, nozzle shell and other test fixtures.

[0005] The main deficiencies of the typical nozzle shell hydraulic test fixture are as follows:

[0006] a) For certain nozzle housing structures, the nozzle housing sealing structure will not withstand the water pressure strength during the hydraulic test under actual flight conditions, and the sealing structure will be over-assessed. Therefore, the nozzle housing sealing surface may produce large strain during the hydraulic test.

[0007] b) Larger strains on the nozzle housing sealing surface will lead to an increase in the sealing gap and a decrease in the compression rate of the O-ring, posing a risk of failure in the seal between the sealing ring and the combustion chamber.

[0008] Existing patent publication number CN221744964U discloses a nozzle inspection fixture comprising: a base plate mounted on the workbench of the three-dimensional measuring instrument; an adjustment plate; a fixing member mounted on the adjustment plate; and a locking ring threaded onto the larger end of the stepped hole. The locking ring secures the nozzle to the step of the stepped hole through the threaded locking force. However, this fixture cannot prevent continued significant strain on the nozzle housing sealing surface after hydraulic testing.

[0009] Therefore, the technical problem that urgently needs to be solved is: how to provide a nozzle hydraulic inspection and blasting test tooling, which has a simple structure, is easy to disassemble, has reliable connection, is suitable for nozzle shell hydraulic testing under specific conditions, and avoids continued large strain on the nozzle shell sealing surface after the hydraulic test. Utility Model Content

[0010] The purpose of this application is to provide a nozzle hydraulic inspection and explosion test tool. The test tool has a simple structure, is easy to disassemble, and has reliable connection. It is suitable for hydraulic testing of nozzle shells under specific conditions, avoiding continued large strain on the sealing surface of the nozzle shell after the hydraulic test, and improving the reliability of the sealing surface of the nozzle shell.

[0011] To achieve the above-mentioned purpose, the present application provides a nozzle hydraulic inspection and blasting test tooling, comprising a front head, a rear head and a supporting tooling; the front head and the rear head are respectively connected to the two ends of the nozzle shell; a sealing structure is provided at the connection between the front head and the rear head and the nozzle shell; the supporting tooling is installed into the interior of the nozzle shell, and the supporting tooling is supported on the inner wall of the connection end between the nozzle shell and the front head or the rear head; the nozzle shell has a nozzle shell cavity; the front head has a front head through hole connected to the nozzle shell cavity.

[0012] The nozzle hydraulic inspection and blasting test fixture as described above, wherein the nozzle shell has a tapered section and a straight section; and the supporting fixture is arranged inside the tapered section.

[0013] As described above, the nozzle hydraulic inspection and blasting test fixture, wherein the inner cavity of the nozzle shell includes a conical cavity and a cylindrical cavity; the supporting fixture is arranged in the conical cavity.

[0014] The nozzle hydraulic inspection and blasting test fixture as described above, wherein the outer wall of the supporting fixture is fittedly connected to the inner wall of the nozzle shell.

[0015] As described above, the nozzle hydraulic inspection and blasting test fixture has a support fixture channel extending through the middle portion of the support fixture along its centerline; the support fixture channel is connected to both the front head through hole and the nozzle shell cavity.

[0016] As described above, the nozzle hydraulic inspection and blasting test fixture, wherein the outer wall of the nozzle shell is provided with a front sealing ring installation groove and a rear sealing ring installation groove; the front sealing ring is provided in the front sealing ring installation groove; the rear sealing ring is provided in the rear sealing ring installation groove.

[0017] As described above, in the nozzle hydraulic inspection and explosion test tooling, after the front head is connected to the nozzle shell, the front sealing ring is located inside the front head; after the rear head is connected to the nozzle shell, the rear sealing ring is located inside the rear head.

[0018] In the nozzle hydraulic inspection and blasting test fixture as described above, the front head is threadedly connected to the nozzle housing; and the rear head is threadedly connected to the nozzle housing.

[0019] In the nozzle hydraulic inspection and blasting test fixture as described above, the rear head is a cover that seals the end of the nozzle shell.

[0020] In the nozzle hydraulic inspection and blasting test fixture as described above, the front sealing ring and the rear sealing ring are both O-rings.

[0021] The beneficial effects achieved by this application are as follows:

[0022] (1) The test fixture of the present application has a simple structure, is easy to disassemble, and has reliable connections. It is suitable for hydraulic testing of the nozzle shell under specific conditions, thereby avoiding continued large strain on the sealing surface of the nozzle shell after the hydraulic test and improving the sealing reliability of the sealing surface of the nozzle shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can also be obtained based on these drawings.

[0024] Figure 1 This is a structural schematic diagram of a nozzle hydraulic inspection and blasting test tooling according to an embodiment of the present application.

[0025] Figure 2 This is a schematic diagram of the nozzle structure of an embodiment of the present application.

[0026] Figure markings: 1-nozzle housing; 2-front head; 3-rear head; 4-support tooling; 5-front sealing ring; 6-rear sealing ring; 11-inner cavity of nozzle housing; 12-front sealing ring mounting groove; 13-rear sealing ring mounting groove; 21-front head through hole; 41-support tooling channel. DETAILED DESCRIPTION

[0027] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0028] As shown in Figure 1 and 2 The present application provides a nozzle hydraulic inspection and explosion test tool, which comprises a front head 2, a rear head 3 and a support tool 4; the front head 2 and the rear head 3 are connected with two ends of a nozzle shell 1 respectively; the front head 2 and the rear head 3 are provided with sealing structures at the connection positions with the nozzle shell 1; the support tool 4 is arranged in the nozzle shell 1, and the support tool 4 is supported on the inner wall of the connection end of the nozzle shell 1 and the front head 2 or the rear head 3; the nozzle shell 1 has a nozzle shell cavity; and the front head 2 has a front head through hole 21 which is in communication with the nozzle shell cavity. High-temperature and high-pressure gas is injected into the inner cavity 11 of the nozzle shell, so that the nozzle shell 1 is tested. During the test, the deformation, leakage and pressure change of the nozzle shell can be observed and recorded, so as to evaluate whether the strength and sealing performance of the nozzle shell meet the design requirements.

[0029] As shown in Figure 1 and 2 The nozzle shell 1 has a conical section and a straight cylinder section, the conical section and the straight cylinder section are integrally formed, the conical section is expanded outward along the end of the straight cylinder section; the conical section has a large-diameter end and a small-diameter end, the diameter of the large-diameter end is larger than that of the small-diameter end, and the small-diameter end is connected with the straight cylinder section; and the support tool 4 is arranged in the conical section.

[0030] As shown in Figure 1 The front head 2 is connected with the large-diameter end of the conical section, and the side wall of the support tool 4 is in abutment with the side wall of the front head 2. The outer peripheral wall of the support tool 4 is in abutment with the inner peripheral wall of the nozzle shell 1, and the support tool 4 provides a supporting action for the nozzle shell 1.

[0031] As a specific embodiment of the present application, the inner cavity 11 of the nozzle shell comprises a conical cavity and a cylindrical cavity; and the support tool 4 is arranged in the conical cavity.

[0032] As a specific embodiment of the present application, the outer wall of the support tool 4 is in abutment with the inner wall of the nozzle shell 1, and the support tool 4 is supported on the inner wall of the end of the nozzle shell 1 having the front sealing ring mounting groove 12, so as to support the inner wall of the end of the nozzle shell 1 having the front sealing ring mounting groove 12 in the nozzle shell 1, and avoid that the sealing surface of the nozzle shell (i.e. the side of the nozzle shell 1 mounting the front sealing ring 5) continues to have a large strain after the hydraulic test, thereby improving the reliability of the sealing of the sealing surface of the nozzle shell.

[0033] like Figure 1 As shown, the middle part of the support tooling 4 has a support tooling channel 41 that passes through along its center line direction; the support tooling channel 41 is connected to the front head through hole 21 and the nozzle shell cavity, so that high-pressure liquid can be injected into the nozzle shell cavity 11 through the front head through hole 21 and the support tooling channel 41.

[0034] like Figure 1 and 2 As shown, the outer wall of the nozzle housing 1 is provided with a front sealing ring mounting groove 12 and a rear sealing ring mounting groove 13. The front sealing ring 5 is mounted in the front sealing ring mounting groove 12, and the rear sealing ring 6 is mounted in the rear sealing ring mounting groove 13. The front sealing ring 5 is restrained in the front sealing ring mounting groove 12 to prevent the front sealing ring 5 from changing its position. The rear sealing ring 6 is restrained in the rear sealing ring mounting groove 13 to prevent the rear sealing ring 6 from changing its position.

[0035] As a specific embodiment of the present invention, after the front head 2 is connected to the nozzle housing 1, the front sealing ring 5 is located inside the front head 2; after the rear head 3 is connected to the nozzle housing 1, the rear sealing ring 6 is located inside the rear head 3.

[0036] As a specific embodiment of the present invention, the front end cap 2 is threadedly connected to the nozzle housing 1; the rear end cap 3 is threadedly connected to the nozzle housing 1. Both ends of the nozzle housing 1 have external threads; the front end cap 2 has internal threads; the front end cap 2 is threadedly connected to the external threads at the end of the nozzle housing 1 via the internal threads, thereby achieving a fixed connection between the front end cap 2 and the nozzle housing 1. The rear end cap 3 has internal threads; the rear end cap 3 is threadedly connected to the external threads at the end of the nozzle housing 1 via the internal threads, thereby achieving a fixed connection between the rear end cap 3 and the nozzle housing 1.

[0037] As a specific embodiment of the present invention, the rear head 3 is a cover body sealed at the end of the nozzle housing 1. The rear head 3 is a closed cover body and has no through hole.

[0038] As a specific embodiment of the present invention, the front sealing ring 5 and the rear sealing ring 6 are both O-rings. O-rings are existing sealing rings. The front sealing ring mounting groove 12 is an annular groove, and the front sealing ring 5 is sleeved in the front sealing ring mounting groove 12. The rear sealing ring mounting groove 13 is an annular groove, and the rear sealing ring is sleeved in the rear sealing ring mounting groove 13. The front sealing ring 5 is sealingly connected to the connection between the front head 2 and the nozzle housing 1, thereby achieving a sealed connection between the front head 2 and the nozzle housing 1. The rear sealing ring 6 is sealingly connected to the connection between the rear head 3 and the nozzle housing 1, thereby achieving a sealed connection between the rear head 3 and the nozzle housing 1.

[0039] As a specific embodiment of the present utility model, the assembly process of the nozzle hydraulic inspection and blasting test tooling of the present application is: first, the support tooling 4 is installed into the nozzle shell 1 without any mechanical connection. The function of the support tooling 4 is to protect the sealing surface of the nozzle shell 1 to avoid large strain on the sealing surface of the nozzle shell 1 after the hydraulic test. The front head 2 and the rear head 3 are connected to the nozzle shell 1 using a threaded connection structure (the front and rear of the nozzle shell 1 are threaded structures) to achieve a fixed connection between the front head 2 and the nozzle shell 1 and a fixed connection between the rear head 3 and the nozzle shell 1.

[0040] The beneficial effects achieved by this application are as follows:

[0041] (1) The test fixture of the present application has a simple structure, is easy to disassemble, and has reliable connections. It is suitable for hydraulic testing of the nozzle shell under specific conditions, thereby avoiding continued large strain on the sealing surface of the nozzle shell after the hydraulic test and improving the sealing reliability of the sealing surface of the nozzle shell.

[0042] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0043] In the description of this application, the word "for example" is used to mean "used as an example, illustration or explanation". Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0044] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A nozzle hydraulic inspection and blasting test tool, characterized in that: Including front head, rear head and supporting tooling; The front head and the rear head are connected to both ends of the nozzle shell respectively; a sealing structure is provided at the connection between the front head and the rear head and the nozzle shell; The supporting fixture is installed in the nozzle housing, and the supporting fixture is supported on the inner wall of the connection end between the nozzle housing and the front head or the rear head; The nozzle housing has a nozzle housing cavity; The front head has a front head through hole communicated with the nozzle shell cavity.

2. The nozzle hydraulic inspection and blasting test tool according to claim 1 is characterized in that: The nozzle housing has a tapered section and a straight section; The supporting tool is arranged inside the tapered section.

3. The nozzle hydraulic inspection and blasting test tool according to claim 1, characterized in that: The inner cavity of the nozzle shell includes a conical cavity and a cylindrical cavity; The supporting tool is arranged in the conical cavity.

4. The nozzle hydraulic inspection and blasting test tool according to any one of claims 1 to 3, characterized in that: The outer wall of the supporting fixture is in close contact with the inner wall of the nozzle housing.

5. The nozzle hydraulic inspection and blasting test tool according to claim 4 is characterized in that: The middle portion of the support tooling has a support tooling channel running through along the center line direction thereof; The support tooling channel is communicated with both the front head through hole and the nozzle shell cavity.

6. The nozzle hydraulic inspection and blasting test tool according to claim 1, characterized in that: The outer wall of the nozzle housing is provided with a front sealing ring installation groove and a rear sealing ring installation groove; A front sealing ring is provided in the front sealing ring installation groove; A rear sealing ring is arranged in the rear sealing ring installation groove.

7. The nozzle hydraulic inspection and blasting test tool according to claim 6, characterized in that: After the front head is connected to the nozzle housing, the front sealing ring is located inside the front head; After the rear head is connected to the nozzle housing, the rear sealing ring is located inside the rear head.

8. The nozzle hydraulic inspection and blasting test tool according to claim 1, characterized in that: The front head is threadedly connected to the nozzle housing; the rear head is threadedly connected to the nozzle housing.

9. The nozzle hydraulic inspection and blasting test tool according to claim 1, characterized in that: The rear head is a cover body that seals the end of the nozzle shell.

10. The nozzle hydraulic inspection and blasting test tool according to claim 6, characterized in that: The front sealing ring and the rear sealing ring are both O-type sealing rings.

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