CN219657156U

CN219657156U - Hydraulic inspection and hydraulic blasting test tool for shell of small long tail nozzle

Info

Publication number: CN219657156U
Application number: CN202321371133.0U
Authority: CN
Inventors: 阿拉木斯; 巴图; 于永江; 胡伟; 王金海; 杜广平; 王恒; 吴冉
Original assignee: Inner Mongolia Aerospace Honggang Machinery Co ltd
Current assignee: Inner Mongolia Aerospace Honggang Machinery Co ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-09-08
Anticipated expiration: 2033-05-30

Abstract

The utility model relates to the technical field of small-sized spray pipe shell inspection tests, in particular to a hydraulic inspection and hydraulic blasting test tool for a small-sized long tail spray pipe shell. The sealing device consists of a front sealing disc assembly, a sealing ring 1, a pull rod, a sealing ring 2, a rear sealing disc, a spring washer and a nut, wherein the front sealing disc assembly is fixedly connected with the large end of a spray pipe shell to supplement the radial sealing ring 1; the rear sealing disc is fixedly connected with the small end of the spray pipe shell, and is used for supplementing the sealing ring 2; the rear sealing disk is fixedly connected with the front sealing disk assembly through a pull rod. The utility model solves the problems that one end of the shell of the small spray pipe is free of a tool connecting structure and is free of a sealing structure, and compared with a tool adopting a flange connection mode, the tool has fewer components and simple structure, and can realize quick assembly and disassembly of the tool.

Description

Hydraulic inspection and hydraulic blasting test tool for shell of small long tail nozzle

Technical Field

The utility model relates to the technical field of small-sized spray pipe shell inspection tests, in particular to a hydraulic inspection and hydraulic blasting test tool for a small-sized long tail spray pipe shell.

Background

In the working process of the solid rocket engine, the pressure of a combustion chamber can reach 14MPa, high-temperature and high-pressure gas expands through the spray pipe to generate thrust, and the shell of the spray pipe is used as a main bearing part of the spray pipe, so that the structural strength verification is carried out. The strength verification of the nozzle housing is mainly carried out by means of an analytical method or a finite element algorithm, and in order to verify the correctness of the design and the quality detection of the product, hydraulic verification and damage test of the nozzle housing are required.

A typical small-sized long tail nozzle housing structure is schematically shown in FIG. 1, a radial sealing structure is designed at the large opening end of the nozzle housing, a sealing structure is not designed at the small opening end, the overall size is small, and the wall thickness of a straight column section of the nozzle housing is only 1mm. The traditional thick-wall spray pipe shell is generally provided with a tool connection structure, a front plug cover and a rear plug cover are connected through flanges, and a water pressure water explosion test is carried out through radial sealing. For a typical small-sized long tail nozzle shell, the wall thickness is thinner, the rigidity is lower than that of the thick-wall nozzle shell, the size of a connecting part is small, end face sealing cannot be implemented, and meanwhile, a tool connecting structure is not reserved at one end due to the small overall size.

The existing small-sized spray pipe shell water pressure and pressure blasting tool has the following defects: the connection mode of the hydraulic pressure and pressure blasting tool and the spray pipe shell is usually a flange connection mode, and cannot be suitable for a small-sized spray pipe shell with low rigidity; the tool assembly is more, the structure is complex, and quick assembly and disassembly cannot be realized; the size of the connecting part of the spray pipe shell is small, and the end face sealing cannot be implemented; the whole size of the spray pipe shell is smaller, and a tooling connecting structure is not reserved at one end.

Disclosure of Invention

Technical problem to be solved by the utility model

The utility model provides a hydraulic inspection and hydraulic blasting test tool for a small-sized long tail nozzle shell, which aims to solve the problems that one end of the small-sized long tail nozzle shell is free of a tool connection structure and cannot implement end face sealing.

In order to solve the technical problems, the utility model adopts the technical proposal

The tool consists of a front sealing disc assembly, a sealing ring 1, a pull rod, a sealing ring 2, a rear sealing disc, a spring washer and a nut, wherein the front sealing disc assembly is fixedly connected with the large end of the nozzle shell, and the radial sealing ring 1 is supplemented; the rear sealing disc is fixedly connected with the small end of the spray pipe shell, and is used for supplementing the sealing ring 2; the rear sealing disk is fixedly connected with the front sealing disk assembly through a pull rod.

Further, the front sealing disc assembly is formed by assembling and welding a water inlet and a front sealing disc, the materials are 30CrMnSiA, and the heat treatment hardness is 28-34HRC.

Further, the rear sealing disk is uniformly provided with 8 connecting threaded holes, and the front sealing disk is fixedly connected by matching with a threaded pull rod, a spring washer and a nut.

Further, the front seal disk assembly is selectively threadably coupled to the spout housing.

Further, the rear sealing disk material is 30CrMnSiA, and the heat treatment hardness is 28-34HRC.

Further, the rear sealing disc is provided with a radial sealing groove, and is matched with the sealing ring 2 to realize sealing, so that the compression amount of the sealing ring is ensured to be 18%.

Further, the front end of the rear sealing disc is provided with a chamfer C1, smooth assembly is facilitated, the perpendicularity of the sealing surface and the vertical end face is not more than 0.5, and the coaxiality of the inner diameter of the sealing groove and the excircle of the sealing surface is not more than 0.5.

The utility model has the technical effects that

The utility model solves the problems that one end of the shell of the small spray pipe is free of a tool connecting structure and is free of a sealing structure, and compared with a tool adopting a flange connection mode, the tool has fewer components and simple structure, and can realize quick assembly and disassembly of the tool.

Drawings

Fig. 1: a schematic structural view of a small spray pipe shell;

fig. 2: hydraulic inspection and hydraulic blasting test tool structure schematic diagram;

fig. 3: a front sealing disk assembly structure schematic diagram;

fig. 4: a rear sealing plate structure schematic diagram;

wherein: the device comprises a 1-spray pipe shell, a 2-front sealing disc assembly, a 3-sealing ring 1, 4-threaded pull rod, a 5-sealing ring 2, 6-rear sealing disc, a 7-spring washer, an 8-nut, a 9-water inlet and a 10-front sealing disc.

Detailed Description

The utility model designs a hydraulic inspection and hydraulic blasting test tool for a small-sized long tail spray pipe shell capable of being quickly disassembled and assembled, which mainly comprises a front sealing disc, a rear sealing disc, a threaded pull rod and a nut, wherein the front sealing disc is provided with a water inlet and is in threaded fit with the largest outer circle of the spray pipe shell, and a radial sealing ring is supplemented by utilizing a radial sealing groove structure at the large end of the shell to realize sealing; the rear sealing disc is directly connected with the small end of the jet pipe shell, the radial sealing ring is supplemented, the inner diameter of the small end of the jet pipe is used as a sealing surface to realize sealing, the rear sealing disc is fastened with the front sealing disc assembly through 8 uniformly distributed pull rods, and the hydraulic test and the hydraulic blasting test of the small-sized long-tail jet pipe shell can be realized after the installation is completed. The problem that small-size spray tube casing one end does not have frock connection structure and can't implement the terminal surface seal has been solved in this design, simultaneously, this frock compares the subassembly with the frock that adopts flange joint mode few, simple structure, can realize frock quick assembly disassembly.

In order to make the objects, technical solutions and advantages of the present utility model become more apparent, the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings in the embodiments of the present utility model. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the utility model. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

The utility model designs a hydraulic inspection and hydraulic blasting test tool for a small-sized long tail nozzle shell capable of being quickly disassembled and assembled, and solves the problems of hydraulic inspection and hydraulic blasting test of the nozzle shell with the structure. As shown in fig. 2, the hydraulic pressure detection tool with the structure comprises a front sealing disc assembly, a sealing ring 1, a pull rod, a sealing ring 2, a rear sealing disc, a spring washer and a nut. The front sealing disc assembly and the rear sealing disc radially seal the front opening and the rear opening of the jet pipe shell, the front sealing disc assembly is connected with the big end screw thread of the jet pipe shell through screw threads, the rear sealing disc radially seals the small end inner diameter of the jet pipe shell, the rear gland is tensioned through the uniformly distributed 8 pull rods, the compression amount of the radial sealing rings of the front opening and the rear opening is ensured to be 18%, and the tool can be quickly disassembled and assembled, so that the hydraulic test and the hydraulic blasting test of the small-sized long-tail jet pipe shell are realized.

As shown in FIG. 3, the front sealing disk assembly is structurally schematic, is formed by assembling and welding a water inlet and a front sealing disk, is made of 30CrMnSiA, has heat treatment hardness of 28-34HRC and is matched with a sealing ring 1 to realize sealing. The front sealing disk is uniformly provided with 8 connecting threaded holes, and is matched with a pull rod, a spring washer and a nut to be connected and fixed with the rear sealing disk; the inner hole of the front sealing disk is provided with an inner thread which is fixedly connected with the outer thread of the large end of the spray pipe shell.

As shown in FIG. 4, the rear sealing disk is structurally schematic, the material is 30CrMnSiA, and the heat treatment hardness is 28-34HRC. The rear sealing disc is designed with a radial sealing groove, and is matched with the sealing ring 2 to realize sealing, so that the compression amount of the sealing ring is ensured to be 18%. The front end is provided with a chamfer C1, so that smooth assembly is facilitated, the perpendicularity of the sealing surface and the vertical end surface is not more than 0.5, and the coaxiality of the inner diameter of the sealing groove and the excircle of the sealing surface is not more than 0.5. The rear sealing disk is uniformly distributed with 8 connecting threaded holes, and the front sealing disk 10 is fixedly connected with the pull rod 4, the spring washer 7 and the nut 8.

In the test process, pressurized water enters the spray pipe shell through the inner hole channel of the water inlet 9, and after the whole pipeline and the shell are filled with water, the pressurized water is pressurized to a specified pressure by a pressurizing system and the pressure is maintained.

The small long tail nozzle shell is designed by the utility model, so that the quick assembly and disassembly of the tool are realized, and the 17Mpa water pressure detection and the 25Mpa water pressure explosion test are passed.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

Claims

1. A hydraulic test and hydraulic blasting test tool for a small-sized long tail nozzle shell is characterized in that: the tool consists of a front sealing disc assembly (2), a sealing ring 1 (3), a threaded pull rod (4), a sealing ring 2 (5), a rear sealing disc (6), a spring washer (7) and a nut (8), wherein the front sealing disc assembly (2) is fixedly connected with the large end of a spray pipe shell, and the radial sealing ring 1 (3) is supplemented to realize sealing; the rear sealing disc (6) is fixedly connected with the small end of the spray pipe shell, and the supplementary sealing ring 2 (5) is used for realizing sealing; the rear sealing disc is fixedly connected with the front sealing disc component through a threaded pull rod (4).

2. The small-sized long tail nozzle housing hydraulic inspection and hydraulic blasting test fixture according to claim 1, wherein: the front sealing disc assembly (2) is formed by assembling and welding a water inlet (9) and a front sealing disc (10), the materials are 30CrMnSiA, and the heat treatment hardness is 28-34HRC.

3. The small-sized long tail nozzle housing hydraulic inspection and hydraulic blasting test fixture according to claim 2, wherein: the rear sealing disc (6) is uniformly provided with 8 connecting threaded holes, and is matched with the threaded pull rod (4), the spring washer (7) and the nut (8) to be connected and fixed with the front sealing disc (10).

4. The small-sized long tail nozzle housing hydraulic inspection and hydraulic blasting test fixture according to claim 1, wherein: the front sealing disc assembly (2) is connected with the spray pipe shell through screw threads.

5. A small-size long tail nozzle housing hydraulic pressure inspection and hydraulic pressure burst test frock according to claim 3, characterized by: the material of the rear sealing disc (6) is 30CrMnSiA, and the heat treatment hardness is 28-34HRC.

6. The small-sized long tail nozzle housing hydraulic inspection and hydraulic blasting test fixture according to claim 5, wherein: the rear sealing disc (6) is provided with a radial sealing groove, and is matched with the sealing ring 2 (5) to realize sealing.

7. The small-sized long tail nozzle housing hydraulic inspection and hydraulic blasting test fixture according to claim 6, wherein: the front end of the rear sealing disc (6) is provided with a chamfer C1, smooth assembly is facilitated, the perpendicularity of the sealing surface and the vertical end face is not more than 0.5, and the coaxiality of the inner diameter of the sealing groove and the excircle of the sealing surface is not more than 0.5.