CN219244914U

CN219244914U - Simple airtight inspection device

Info

Publication number: CN219244914U
Application number: CN202223300094.3U
Authority: CN
Inventors: 王鹏乾; 李嘉臻; 骆江峰; 邵雨; 张晓明; 万孝国; 王玮; 王学思; 姬生雁
Original assignee: Hubei Sanjiang Aerospace Jianghe Chemical Technology Co Ltd
Current assignee: Hubei Sanjiang Aerospace Jianghe Chemical Technology Co Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-06-23
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to a simple airtight inspection device, which comprises an airtight box, a pressure reducer, a stop valve, a precise pressure gauge and an airtight joint, wherein one end of the pressure reducer is connected with the airtight box through an airtight pipeline, the other end of the pressure reducer is connected with an air source, and the inflation pressure of the airtight box is regulated through the pressure reducer; the stop valve and the precise pressure gauge are respectively arranged on the airtight box, the pressure reducer, the stop valve, the precise pressure gauge and the airtight joint are connected through airtight pipelines, the stop valve is controlled to perform the operations of inflating, pressure maintaining and pressure releasing of the product 3, and whether the airtight inspection is qualified is judged by reading the precise pressure gauge; the airtight joint is installed on the product and is connected with the airtight box through an airtight pipeline. The utility model simplifies the structure and reduces the weight on the basis of meeting the requirements of the general design institute and users. The device is simple to operate and reliable in detection, is suitable for all solid rocket engines, is internally provided with a tool storage area, and is provided with special airtight tools for different model tasks.

Description

Simple airtight inspection device

Technical Field

The utility model belongs to the technical field of solid rocket engine detection, and particularly relates to a simple airtight inspection device.

Background

The air tightness is used as a key performance of the solid rocket engine, and directly influences the delivery and the use of the product, so that the air tightness of the engine is checked in the links of product assembly, ground test, flight test, maintenance and repair, army training and the like, and the operation of pressure detection and pressure air supplement is carried out according to actual conditions. The airtight inspection device adopted by the early-stage company and the army is a trolley type airtight device, and as shown in fig. 1, an airtight pipeline, an air source interface and a product interface to be inspected are designed in the trolley type airtight device. The device can complete the air tightness check of the engine, but does not have the functions of product pressure detection and pressure air supplement, and in the early stage, in order to keep the air tightness check function aiming at the model ignition engine, the ignition ball head and the matched small engine, the device is large in size and is about 1100mm multiplied by 610mm, and the air tightness check and the needed tools, spare accessories, accessories and the like need to be additionally provided with a tool box.

According to the design and the use requirements of users, the airtight inspection device for delivering troops only needs to keep the airtight inspection function of the engine, and the airtight inspection of the matched products is carried out before delivery from a factory and during the repair of the matched products in a factory.

Disclosure of Invention

The utility model aims to provide a simple airtight inspection device for solving the problem of airtight inspection of an engine.

In order to solve the existing technical problems, the utility model adopts the following technical scheme: the simple airtight inspection device comprises an airtight box, a pressure reducer, a stop valve, a precise pressure gauge and an airtight joint, wherein one end of the pressure reducer is connected with the airtight box through an airtight pipeline, the other end of the pressure reducer is connected with an air source, and the inflation pressure of the airtight box is regulated through the pressure reducer; the stop valve and the precise pressure gauge are respectively arranged on the airtight box, the pressure reducer, the stop valve, the precise pressure gauge and the airtight joint are connected through airtight pipelines, the stop valve is controlled to perform the operations of inflating, pressure maintaining and pressure releasing of the product 3, and whether the airtight inspection is qualified is judged by reading the precise pressure gauge; the airtight joint is arranged on the product and is connected with the airtight box through an airtight pipeline.

Further, in order to adapt to the connection of the flexible plug of the spray pipe, the airtight joint adopts an inflation core, the front part of the inflation core is a cone section, and the cone section of the inflation core is inserted into an inflation hole of the plug and sealed by utilizing the cone surface of the inflation core; the rear end of the air filling core is a threaded section, and the threaded section of the air filling core is connected with the airtight box through an airtight pipeline.

Further, in order to adapt to the connection of the airtight interface of the engine head top cover, the front end of the airtight joint 2-5 adopts an interface corresponding to the thread of the airtight interface of the top cover, and is connected with the airtight interface of the top cover through the front end interface of the airtight joint; the rear end of the airtight joint is a threaded section, and the threaded section of the airtight joint is connected with the airtight box through an airtight pipeline.

Further, in order to adapt to the detection of the product with pressure, the airtight inspection device also comprises a digital display precision pressure gauge, a right angle joint, a sleeved nut adapter and an airtight joint with pressure, wherein one end of the airtight joint with pressure is connected with a pressure measuring hole of the product, the other end of the airtight joint with pressure is connected with one end of the right angle joint through the sleeved nut adapter, and the digital display precision pressure gauge is installed and connected with the other end of the right angle joint.

Further, the airtight box is divided into four parts, namely an airtight pipe and tool positioning area, a pressure reducer positioning area, an airtight tool positioning area and a precise pressure gauge positioning area, wherein the airtight pipe and tool positioning area are divided into an upper layer and a lower layer, the lower layer is used for placing tools used for airtight inspection of an engine, and the upper layer is used for placing the airtight pipe; the pressure reducer positioning area is arranged in the middle of the airtight pipe positioning area; the airtight tool positioning area is divided into an upper part and a lower part and is used for placing an inflatable core and an airtight joint; the positioning area of the precise pressure gauge is provided with a placing groove according to the appearance characteristics of the precise pressure gauge.

Further, a rectangular through groove is formed in the outer side of the upper surface of the box body of the airtight box and used for placing an airtight pipeline and fixing a precise pressure gauge; the bottom of the case body is internally provided with a telescopic pull rod, hidden idler wheels are arranged, the butterfly is locked with the case cover case body, and handles are arranged on two sides of the case cover case body.

The simple airtight inspection device optimizes the structure of the airtight device on the basis of meeting the design and user requirements, reduces the volume by 75.5%, reduces the quality by 63.2%, and is convenient to carry and use. The simple airtight inspection device is simple to operate and reliable in function, a tool storage area is designed in the simple airtight inspection device, special airtight tools are configured for different types of tasks, and airtight inspection of all types of engines is supported.

The utility model adopts an external air source, is internally provided with an airtight function operation area and detection functions such as airtight, pressure detection, air supplementing operation and the like of an integrated product, and has the advantages of simple structure, convenient carrying and strong applicability, and tools, meters and the like required by the operation area.

Advantageous effects

The simple airtight inspection device of the utility model simplifies the structure and reduces the weight on the basis of meeting the requirements of the general design institute and users. The device is simple to operate and reliable in detection, is suitable for all solid rocket engines, is internally provided with a tool storage area, and is provided with special airtight tools for different model tasks.

Drawings

FIG. 1 is a schematic structural diagram of a trolley type platform airtight device, comprising: the device comprises a table body 4, a top cover 5 and a surge tank 6;

FIG. 2 is a schematic diagram of the principle of airtight detection, comprising: the air source 1, the airtight inspection device 2, the pressure reducer 2-1, the airtight pipeline 2-2, the stop valve 2-3, the precise pressure gauge 2-4, the airtight joint 2-5 and the product 3;

FIG. 3 is a schematic view of the airtight joint structure of the inflatable core at the flexible plug of the spray pipe;

FIG. 4 is a schematic view of the airtight joint structure at the head top cover;

FIG. 5 is a schematic diagram of a belt pressure detection mechanism, comprising: 2-6-1 of digital display precision pressure gauge, 2-6-2 of right angle joint, 2-6-3 of external nut adapter, 2-6-4 of airtight joint with pressure;

FIG. 6 is a schematic diagram of functional area division of the airtight inspection apparatus;

FIG. 7 is a schematic top view of a functional area division of the airtight inspection apparatus;

FIG. 8 is a schematic view of the appearance of the airtight inspection apparatus.

Detailed Description

The utility model will now be described in more detail by way of example with reference to the accompanying drawings,

the embodiment of the utility model mainly comprises the following steps: airtight function design, connection mode design, location area design and box design.

1. And (5) designing an airtight function.

Four airtight functions are mainly supported: 1) Self-checking an airtight device; 2) Checking the air tightness of the product; 3) Detecting the pressure of the inner cavity of the product; 4) The product supplements qi. The airtight principle is shown in figure 2, one end of the airtight inspection device is connected with an air source, and the other end of the airtight inspection device is connected with a product to be inspected through an airtight joint 2-5 in a sealing connection mode; the inflation pressure is regulated through the pressure reducer 2-1, the stop valve 2-3 is controlled to perform inflation, pressure maintaining and pressure relief operations of the product, and whether the airtight inspection is qualified is judged through the reading number precision pressure gauge 2-4. The airtight joint 2-5 is designed according to the kind of the product or the airtight inspection mode. After the airtight pipeline 2-2 is connected, only the airtight connector 2-5 needs to be replaced when airtight inspection of different products is carried out. After the airtight inspection device is assembled, the main airtight functions 1), 2), 3) and 4) can be realized, the pressure detection equipment is required to be configured independently, and the product air supplementing operation is carried out by matching with the airtight inspection device while the pressure detection is carried out.

2. And (3) designing an airtight joint.

The design of the airtight joint is determined according to the form and size of the airtight interface of the engine.

1) The airtight interface of the engine is designed at the flexible blanking cover of the spray pipe. The air-filling core 2-5-1 is adopted as an airtight joint, a threaded section of the air-filling core 2-5-1 is connected with an airtight pipeline during airtight inspection, a cone section is inserted into an air-filling hole of a plugging cover, and is sealed by utilizing a cone surface of the cone section and supported on a spray pipe diffusion section in an auxiliary manner through an air-filling support. The inflatable core is shown in fig. 3.

2) The airtight interface of the engine is designed at the head cover. According to the thread size of the airtight interface of the top cover, a special airtight connector of a model is designed, one end of the airtight connector is connected with an airtight pipeline when airtight inspection is carried out, and the other end of the airtight connector is connected with the airtight interface on the top cover for airtight inspection. The airtight joint is shown in fig. 4.

3. Product belt pressure detection

The pressure detection requires that the internal cavity pressure of the engine is tested on the premise of not exhausting the gas in the internal cavity of the engine, and a digital display precision pressure gauge is generally used for the pressure detection. During detection, the digital display precision pressure gauge 2-6-1 is connected with the right-angle joint 2-6-2 through threads, then the pressurized airtight joint 2-6-4 is pre-connected with a pressure measuring hole of a product 3, the right-angle joint 2-6-2 is connected with the pressurized airtight joint 2-6-4 through the outer sleeve nut adapter 2-6-3 and is screwed, finally the pressurized airtight joint 2-6-4 is screwed, and the pressure of an inner cavity of an engine is obtained by reading the indication of the digital display precision pressure gauge 2-6-1. The belt pressure detection mechanism is shown in fig. 5.

4. Pressurized air-supplementing product

As shown in fig. 2, when the product is pressurized for air supply, the stop valve 2-3 is closed first, then the airtight pipeline 2-2 is connected, the airtight pipeline 2-2 is connected with the airtight joint 2-5, and finally the airtight joint 2-5 is screwed with the pressure measuring hole of the engine. During air supplementing, the valve on the nitrogen cylinder is firstly opened slowly, then the pressure reducing valve is opened slowly, and finally the stop valve 2-3 is opened to supplement air to the engine.

5. And (5) designing a functional area.

The design of the functional area is shown in fig. 6, and the functional area is divided into an airtight pipe, a tool positioning area, a pressure reducer positioning area, an airtight tool positioning area and a precision pressure gauge positioning area. The airtight pipe and the tool positioning area are divided into an upper layer and a lower layer, the lower layer is used for placing tools used for engine airtight inspection, and the upper layer is used for placing the airtight pipe; the pressure reducer positioning area is designed in the middle of the airtight pipe positioning area, so that the internal space is fully utilized on the basis of ensuring the reliability of the pressure reducer fixation; the airtight tool positioning area is divided into an upper part and a lower part and is used for placing an inflatable core and an airtight joint; the positioning area of the precise pressure gauge is provided with a special placing groove according to the appearance characteristics of the pressure gauge, and has good protection effect.

When in use, the precision pressure gauge 2-4 is placed at the positioning position of the box cover, the visual height is ensured to be flush with the squatting position of a person, and the precision pressure gauge is connected and fastened by the pressure gauge connecting pipe; then the air source 1 and the oxygen pressure meter pressure reducer 2-1 are connected through the air source air inlet pipe airtight pipeline 2-2, and the corresponding airtight joint 2-5 and the product 3 are connected through the product connecting pipe airtight pipeline 2-2; and performing an airtight detection operation.

6. And (5) designing a box body.

The box body is determined according to the positioning of the functional area, the external dimensions of the box body are 551mm multiplied by 486mm multiplied by 333mm, and the reading apparent height is about 620mm when the box body is used. The outer side of the upper surface of the box body is provided with a rectangular through groove for placing an airtight pipeline 2-2 and a fixed precise pressure gauge 2-4; the telescopic pull rod is arranged at the bottom of the case body, the hidden roller is arranged, the butterfly is locked on the case cover case body, and handles are arranged on two side surfaces of the case body, so that the case is convenient to carry and transport. The exterior of the case is shown in fig. 7.

Description of operation:

1. and horizontally placing the airtight inspection device, opening the box cover, and sequentially taking out parts, tools and tools required by airtight inspection.

2. And connecting an airtight pipeline, and placing the airtight pipeline and the precise pressure gauge at corresponding positions on the upper surface of the box body.

3. And (5) performing airtight detection, controlling the stop valve to perform inflation and pressure maintaining operation, and reading a meter to judge a detection result. The airtight inspection device of the design has been applied to airtight inspection of solid rocket engines of a certain model at present.

Claims

1. The utility model provides a simple and easy airtight inspection device, includes airtight box and pressure reducer (2-1), stop valve (2-3), accurate manometer (2-4), airtight joint (2-5), its characterized in that: one end of the pressure reducer (2-1) is connected with the airtight box through an airtight pipeline (2-2), the other end of the pressure reducer (2-1) is connected with the air source (1), and the inflation pressure of the airtight box is regulated through the pressure reducer (2-1); the stop valve (2-3) and the precise pressure gauge (2-4) are respectively arranged on the airtight box, the pressure reducer (2-1), the stop valve (2-3), the precise pressure gauge (2-4) and the airtight joint (2-5) are connected through the airtight pipeline (2-2), the stop valve (2-3) is controlled to perform the operations of inflating, pressure maintaining and pressure releasing of the product (3), and whether the airtight inspection is qualified is judged through the reading number precise pressure gauge (2-4); the airtight joint (2-5) is arranged on the product (3) and is connected with the airtight box through an airtight pipeline (2-2);

the airtight box is divided into four parts, namely an airtight pipe and tool positioning area, a pressure reducer positioning area, an airtight tool positioning area and a precision pressure gauge positioning area, wherein the airtight pipe and tool positioning area is divided into an upper layer and a lower layer, the lower layer is used for placing tools used for engine airtight inspection, and the upper layer is used for placing the airtight pipe; the pressure reducer positioning area is arranged in the middle of the airtight pipe positioning area; the airtight tool positioning area is divided into an upper part and a lower part and is used for placing an inflatable core and an airtight joint; the positioning area of the precise pressure gauge is provided with a placing groove according to the appearance characteristics of the precise pressure gauge; a rectangular through groove is designed on the outer side of the upper surface of the box body of the airtight box and is used for placing an airtight pipeline (2-2) and fixing a precise pressure gauge (2-4).

2. The air tightness inspection device according to claim 1, wherein: the airtight joint (2-5) adopts an inflatable core (2-5-1), the front part of the inflatable core (2-5-1) is a cone section, and the cone section of the inflatable core (2-5-1) is inserted into an air charging hole of the plug cover and sealed by the cone surface of the inflatable core (2-5-1); the rear end of the air filling core (2-5-1) is provided with a thread section, and the thread section of the air filling core (2-5-1) is connected with the airtight box through an airtight pipeline.

3. The air tightness inspection device according to claim 1, wherein: the front end of the airtight joint (2-5) adopts an interface corresponding to the thread of the airtight interface of the top cover, and is connected with the airtight interface of the top cover through the front end interface of the airtight joint (2-5); the rear end of the airtight joint (2-5) is provided with a threaded section, and the threaded section of the airtight joint (2-5) is connected with the airtight box through an airtight pipeline.

4. The air tightness inspection device according to claim 1, wherein: the airtight inspection device further comprises a digital display precision pressure gauge (2-6-1), a right-angle joint (2-6-2), an outer sleeve nut adapter (2-6-3) and a belt pressure airtight joint (2-6-4), one end of the belt pressure airtight joint (2-6-4) is connected with a pressure measuring hole of a product (3), the other end of the belt pressure airtight joint (2-6-4) is connected with one end of the right-angle joint (2-6-2) through the outer sleeve nut adapter (2-6-3), and the digital display precision pressure gauge (2-6-1) is installed and connected with the other end of the right-angle joint (2-6-2).

5. The air tightness inspection device according to claim 1, wherein: a rectangular through groove is formed in the outer side of the upper surface of the box body of the airtight box and used for placing an airtight pipeline (2-2) and fixing a precise pressure gauge (2-4); the bottom of the case body is internally provided with a telescopic pull rod, hidden idler wheels are arranged, the butterfly is locked with the case cover case body, and handles are arranged on two sides of the case cover case body.