CN110758779A

CN110758779A - Protection device suitable for spacecraft screwed pipe connecting nozzle component

Info

Publication number: CN110758779A
Application number: CN201910922902.3A
Authority: CN
Inventors: 赵春华; 吴奇波; 汤海赵; 张以伟
Original assignee: Shanghai Institute of Space Propulsion
Current assignee: Shanghai Institute of Space Propulsion
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-02-07

Abstract

The invention provides a protection device suitable for a threaded connection nozzle component of a spacecraft, which comprises: a first protective half-box (301), a second protective half-box (302), a half-thread (8), and a hinge (5); the first protective half-box (301) is connected with the second protective half-box (302) through a hinge (5); the first protection half box (301) and the second protection half box (302) are respectively provided with a half thread (8); the half-thread (8) is capable of engaging with a thread on a nipple. The invention has reasonable structure and convenient operation; the device is free of complex devices such as fasteners and pressing mechanisms, does not need to be opened or closed by any tool, and is favorable for dismounting the device at a position where the operation space is narrow and the tool cannot reach.

Description

Protection device suitable for spacecraft screwed pipe connecting nozzle component

Technical Field

The invention relates to the field of protection devices for a threaded filler neck part assembly, in particular to a protection device suitable for a threaded filler neck part assembly of a spacecraft, and particularly relates to a protection device for the threaded filler neck part assembly of the spacecraft in the using and turnover processes.

Background

Because the spacecraft contains more screw-thread nozzle part components, the screw-thread nozzle part components need to be protected in a plurality of links of installation, test and test, the thread parts of the part components are prevented from being damaged and scratched, and more, the redundant substances are prevented from entering the inner cavities of the part components. The traditional load limiting protection device for the pressure sensor, as disclosed in patent document CN104316255A, comprises a pressure measurement part and a load limiting protection part, wherein the pressure measurement part is formed by welding a filler neck and a diaphragm, the diaphragm is provided with an upper boss and a lower boss, a strain gauge is adhered on the diaphragm to form an electric bridge to convert the medium pressure change sensed by the diaphragm into an electric signal, and the electric signal is transmitted through a lead; the load limiting protection part consists of a gland and a locking nut, and the pressure load limiting value is accurately controlled by adjusting the gap delta between the boss on the diaphragm and the gland.

However, the traditional protection device for the screw nozzle component of the spacecraft still has the advantages of being optimized in structure and material.

Disclosure of Invention

In view of the shortcomings of the prior art, it is an object of the present invention to provide a protective device for a threaded nozzle subassembly of a spacecraft.

According to the invention, the protection device suitable for the screw nozzle component of the spacecraft comprises: a first protective half-box 301, a second protective half-box 302, a half-thread 8, and a hinge 5;

the first protective half-box 301 is connected with the second protective half-box 302 by a hinge 5;

the first protection half-box 301 and the second protection half-box 302 are respectively provided with a half thread 8;

the half-thread 8 is capable of engaging with a thread on a nipple.

Preferably, a bolt 1 is arranged on the first protection half-box 301; a boss 6 is arranged on the second protection half box 302; the bolt 1 can be connected with the boss 6 in a matching mode.

Preferably, a sealing groove 2 is arranged on the first protection half-case 301; the second protection half-box 302 is provided with a sealing strip 7; the sealing groove 2 can be matched and connected with the sealing strip 7.

Preferably, the first protection half-box 301 and the second protection half-box 302 are respectively provided with a clasping ring 9; the clamping ring 9 can be in contact with a thread relief of a nipple.

Preferably, the first protection half-case 301 and the second protection half-case 302 are respectively provided with a locking hole 4; the locking hole 4 can penetrate a metal wire.

Compared with the prior art, the invention has the following beneficial effects:

1. reasonable structure and convenient operation.

2. The device is free of complex devices such as fasteners and pressing mechanisms, and does not need to use any tool when being opened and closed, so that the device can be conveniently disassembled and assembled at a position where the tool cannot reach in a narrow operation space.

3. The device is made of polyethylene materials, and can prevent the protection device from being scratched and bruised by the protection piece.

4. This device light in weight, the corrosion-free problem, and plastics are corrosion-resistant, can use various washing liquids to wash to guarantee the cleanliness factor of this device self.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the overall structure of a protection device suitable for a threaded nozzle assembly of a spacecraft, which is provided by the invention.

The figures show that:

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in FIG. 1, the invention provides a protection device suitable for a threaded nozzle component of a spacecraft, which comprises: a first protective half-box 301, a second protective half-box 302, a half-thread 8, and a hinge 5; the first protective half-box 301 is connected with the second protective half-box 302 by a hinge 5; the first protection half-box 301 and the second protection half-box 302 are respectively provided with a half thread 8; the half-thread 8 is capable of engaging with a thread on a nipple. In a preferred embodiment, the threaded filler neck is placed into the first and second protective halves 301, 302 and the filler neck threads are engaged with the half threads 8 in the first and second protective halves 301, 302. In the preferred embodiment, the half-threads 8 are threadedly engaged with the filler neck to prevent axial play by the protector. In a preferred embodiment, when the device is removed, the tongue 1 is lifted outward, the first protective half case 301 and the second protective half case 302 are unfolded, and the protected member is taken out.

Further, a bolt 1 is arranged on the first protection half-box 301; a boss 6 is arranged on the second protection half box 302; the lock tongue 1 can be connected with the boss 6 in a matching way; a sealing groove 2 is formed in the first protection half box 301; the second protection half-box 302 is provided with a sealing strip 7; the sealing groove 2 can be matched and connected with the sealing strip 7. In a preferred embodiment, after the bolt 1 fastens the boss 6, the sealing strip 7 is engaged with the sealing groove 2 and is pressed tightly, and the clasping ring 9 fixes a product in the protection device to prevent external excess from entering the protection device.

Furthermore, the first protection half-box 301 and the second protection half-box 302 are respectively provided with a clasping ring 9; the clasping ring 9 can be contacted with a thread withdrawal groove of the threaded nipple; the first protection half-box 301 and the second protection half-box 302 are respectively provided with a locking hole 4; the locking hole 4 can penetrate a metal wire. In a preferred embodiment, the clasp 9 contacts with a thread withdrawal groove of the nipple, and the first protection half-box 301 and the second protection half-box 302 are clasped together to be wrapped by the protection member in the protection device. In a preferred embodiment, the clasping ring 9 secures the product within the protective device, preventing external excess from entering the protective device. In a preferred embodiment, the locking hole 4 can be used to pass a wire or the like for connection to prevent loss, and also can be used for auxiliary locking. In a preferred embodiment, the device can be cleaned using an organic solvent.

Furthermore, the threaded nozzle assembly has a high thread processing grade, so that the protection device is required not to damage the protected piece, and a material with a softer material is required to be adopted. Therefore, the protective device for the threaded connection nozzle parts of the spacecraft is made of plastic materials, and the surface of a protected piece cannot be damaged. The screw filler neck component parts installed on the aircraft have limited operation space, and the protection device needs to be simple and easy to disassemble and assemble. The threaded filler neck part protection device for the space aircraft adopts a bolt 1 and boss 6 type locking structure, and the protection device can be opened and closed without using any tool. In order to ensure that external excess materials cannot enter the inner cavity of the component, one end of the threaded nozzle component protection device for the space aircraft is of a closed structure, meanwhile, the sealing strips 7 and the sealing grooves 2 are arranged at the joint surfaces of the two protection half boxes, when the device is closed, the sealing strips 7 are meshed with the sealing grooves 2, gaps between the sealing strips 7 and the sealing grooves 2 are filled, and therefore the whole joint surface of the protection half boxes is closed, and the function of preventing external excess materials from entering the inner cavity of a product is achieved. The threaded connection nozzle part assembly is often in a transportation state, the protective device of the threaded connection nozzle part assembly of the spacecraft has to be firmly and reliably fixed on a protected piece, a half thread 8 is arranged for the purpose, and when the protective half box is closed, the half thread 8 is meshed with an external thread on the threaded connection nozzle part assembly to prevent the protected piece from axially moving. If the half-thread 8 is not correctly meshed with the external thread on the nipple part when the nipple part is put into the protection half-box under the opening state of the protection half-box, the protection half-box can not be closed. Meanwhile, the device is provided with two holding rings 9 for holding the screw nipple head components. When the two half protection boxes are closed, the clasping ring 9 is tightly attached to the thread withdrawal groove of the threaded nipple part assembly, so that the device is prevented from loosening, and meanwhile, the clasping ring is used as a radial seal to prevent redundant materials from radially entering the inner cavity of the protection device. When the threaded connecting pipe nozzle part protection device for the space aircraft is closed, a locking hole 4 can be used for penetrating a metal wire to prevent loss or open an auxiliary locking and locking function. The threaded nipple part protection device for the space aircraft is made of polyethylene plastic, has excellent chemical corrosion resistance, and can be cleaned by various cleaning liquids to ensure the cleanness of the device. And the device has good impact toughness, wear resistance and fatigue resistance, and can ensure that the device is not worn after being used for a long time.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A protective device for a component part of a threaded nozzle of a spacecraft, comprising: a first protective half-box (301), a second protective half-box (302), a half-thread (8), and a hinge (5);

the first protective half-box (301) is connected with the second protective half-box (302) through a hinge (5);

the first protection half box (301) and the second protection half box (302) are respectively provided with a half thread (8);

the half-thread (8) is capable of engaging with a thread on a nipple.

2. The protection device for a threaded filler neck component part of a spacecraft of claim 1, characterized in that a bolt (1) is arranged on the first protection half-box (301); a boss (6) is arranged on the second protection half box (302); the lock tongue (1) can be connected with the boss (6) in a matching mode.

3. Protection device for a spacecraft filler neck subassembly as claimed in claim 1, characterized in that said first protection half-box (301) is provided with a sealing groove (2); a sealing strip (7) is arranged on the second protection half box (302); the sealing groove (2) can be matched and connected with the sealing strip (7).

4. The protection device for a threaded nozzle block component of a spacecraft as claimed in claim 1, characterized in that said first protection half-box (301) and said second protection half-box (302) are provided with respective clasps (9); the clamping ring (9) can be contacted with a thread withdrawal groove of the nipple.

5. The protection device for a threaded nozzle block component of a spacecraft of claim 1, wherein the first protection half-box (301) and the second protection half-box (302) are respectively provided with a locking hole (4); the locking hole (4) can penetrate a metal wire.