CN217484676U

CN217484676U - High-temperature vacuum camera protective shell

Info

Publication number: CN217484676U
Application number: CN202221414111.3U
Authority: CN
Inventors: 李泽禹; 赵文峰; 张松贺; 杨远剑
Original assignee: Ultra High Speed Aerodynamics Institute China Aerodynamics Research and Development Center
Current assignee: Ultra High Speed Aerodynamics Institute China Aerodynamics Research and Development Center
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-09-23
Anticipated expiration: 2032-06-08

Abstract

The utility model discloses a high temperature vacuum camera protecting crust, include: a protective tube built in the wind tunnel; observation glass is detachably arranged at the front end of the protective cylinder; an observation camera is fixedly arranged inside the protective cylinder; the front end of the threading pipe is communicated and butted with the rear end of the protective cylinder; the rear end of the threading pipe is communicated and butted on an air outlet of the wind tunnel; an air duct externally connected with a high-pressure air source is inserted into the threading tube; the utility model discloses in, the water-cooling chamber makes places and has obtained good protection at the inside observation camera of electric arc wind-tunnel, does not receive the influence of the inside high temperature air current of electric arc wind-tunnel, and the air duct that inserts protection section of thick bamboo inner chamber makes and originally can't carry out effectual air cooling in being in vacuum environment observation camera to can bear the strong heat radiation that comes from the observed object, the subassembly can be dismantled in integrated protecgulum assembly has been simplified, can accomplish the maintenance of camera and the change work of observing glass fast at the scene.

Description

High-temperature vacuum camera protective shell

Technical Field

The utility model relates to an observation camera high temperature protection field of wind tunnel test specifically is a high temperature vacuum camera protecting crust.

Background

With the development of aerospace vehicles, the requirements on ground heat protection tests are higher and higher, the size of a model is larger and larger, the test time is longer and longer, and the flow field parameters are higher and higher, and the electric arc wind tunnel tests are required to fully meet the requirements. The interior of the electric arc wind tunnel is an examination area of the test model, the interior of the wind tunnel is filled with high-temperature gas, the high-temperature test model can emit strong heat radiation, and meanwhile, the interior of the electric arc wind tunnel is also a vacuum environment; in order to observe the ablation condition of the model and the operation conditions of various devices in the wind tunnel in real time, an observation camera must be installed in the wind tunnel; however, the extremely harsh working environment inside the wind tunnel puts forward a more severe protection requirement on an observation camera inside the wind tunnel.

At present, the observation camera placed in the high-temperature environment of the electric arc wind tunnel is not fully cooled and protected, so that the durability of the observation camera is reduced and even the observation camera is damaged due to high temperature in the test.

Therefore, a device which can meet different use requirements aiming at the severe working environment in the arc wind tunnel, plays a role in observing the ablation condition of a model in the wind tunnel and the working condition of equipment in the wind tunnel, and is specially applied to the high-temperature vacuum high-temperature wind tunnel for protecting the observation camera needs to be researched urgently.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter. To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a high temperature vacuum camera protective case, including:

a protective tube built in the wind tunnel; observation glass is detachably arranged at the front end of the protective cylinder; an observation camera is fixedly arranged inside the protective cylinder;

the front end of the threading pipe is communicated and butted with the rear end of the protective cylinder; the rear end of the threading pipe is communicated and butted on an air outlet of the wind tunnel; an air guide tube externally connected with a high-pressure air source is inserted into the threading tube.

Preferably, the device also comprises a water cooling cavity; the water cooling cavity is arranged on the outer side of the protective cylinder in a surrounding manner; a water inlet pipe and a water outlet pipe are respectively arranged on two sides of the shell of the water cooling cavity; the water inlet pipe and the water outlet pipe are respectively provided with a water inlet joint and a water outlet joint which are externally provided with threads and sealed in a conical manner; the design pressure of the whole cooling water channel formed among the water inlet pipe, the water cooling cavity and the water outlet pipe is 4 MPa.

Preferably, a front cover assembly is arranged at the front end of the protective cylinder; the front cover assembly comprises a cylinder shell; the observation glass is clamped and fixed in the middle of the inner ring of the cylinder shell; a first butt ring is integrally arranged on the outer side of the cylinder shell; a second butt joint ring which is abutted and butted with the first butt joint ring is integrally arranged at the end part of the water-cooling cavity shell; through using a plurality of first fixing bolts to wear to establish on first butt joint circle and second butt joint circle, form and dismantle the connection.

Preferably, the inner wall of the cylinder shell is provided with a support ring around the cylinder shell; the observation glass is disc-shaped and clamped against the front end of the support ring; a circle of first sealing groove is formed in the end face of the front end of the support ring; a first sealing ring is embedded in the first sealing groove.

Preferably, the front end of the cartridge shell is provided with an internal thread cavity; a compression nut is connected to the inner thread cavity through threads; a clamping circular groove is formed between the rear end of the internal thread cavity and the support ring; the inner diameter of the clamping circular groove is smaller than the inner thread cavity and larger than the support ring; the observation glass is of a disc structure matched with the clamping circular groove; and after the observation glass is clamped into the clamping circular groove, the observation glass is screwed and compressed by the compression nut to realize fixation.

Preferably, an annular tetrafluoro pad is arranged between the compression nut and the observation glass.

Preferably, two circles of second seal grooves are arranged between the cylinder shell and the water-cooling cavity shell; and second sealing rings are respectively arranged in the second sealing grooves.

Preferably, the device further comprises a bracket for fixing the observation camera; the support is specifically a fixing plate arranged on two sides of the inner wall of the protective cylinder; the two fixing plates extend inwards; butt joint plates are integrally arranged on two sides of the observation camera; and the two butt joint plates are respectively abutted against the two fixing plates and then are fixed by the two second fixing bolts in a penetrating way.

Preferably, the lower end of the inner wall of the protection cylinder is transversely provided with a limiting block; the limiting block is provided with a limiting groove which is matched and embedded with the air outlet end of the air guide pipe; an opening is formed in one end of the limiting groove.

The utility model discloses at least, include following beneficial effect:

the utility model discloses in, the water-cooling chamber makes the observation camera of placing in the electric arc wind-tunnel obtain good protection, does not receive the influence of the inside high temperature air current of electric arc wind-tunnel, inserts the air duct of protective cylinder inner chamber and makes the observation camera that originally can't effectively cool off in vacuum environment can carry out effectual air cooling to can bear the strong heat radiation that comes from the observed object, the detachable subassembly has been simplified to integrated protecgulum assembly, can accomplish the maintenance of camera and the change work of observation glass at scene fast; the device ensures that an observation camera in the arc wind tunnel is well protected and is not influenced by high-temperature airflow in the arc wind tunnel; the camera which is originally in a vacuum environment and cannot be cooled effectively can be cooled effectively in an air cooling mode, so that the camera can bear strong heat radiation from an observed object, the detachable assembly is simplified, and the maintenance of the camera and the replacement work of observation glass can be completed quickly on site.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a side sectional view of the overall structure of the present invention;

FIG. 2 is a top cross-sectional view of the overall structure of the present invention;

FIG. 3 is a detailed cross-sectional view of the front cover assembly of the present invention;

FIG. 4 is a detailed structure diagram of the protective cylinder connecting the observation camera and the bracket;

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description. It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof. It should be noted that in the description of the present invention, the terms indicating the orientation or the positional relationship are based on the orientation or the positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated 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 invention. In the description of the present invention, unless otherwise specifically stated or limited, the terms "mounting", "providing", "sleeving/connecting", "connecting", etc. shall be understood broadly, for example, "connecting", may be a fixed connection, a detachable connection, or an integral connection, may be a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between two elements, and for those skilled in the art, the specific meaning of the above terms in the present invention shall be understood in a specific manner. Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature in direct contact with the first and second features, or in indirect contact with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. Fig. 1-4 show that the utility model provides a pair of high temperature vacuum camera protecting crust, include:

a protection tube 1 built in the wind tunnel; the front end of the protective cylinder 1 is detachably provided with observation glass 2; an observation camera 3 is fixedly arranged inside the protective cylinder 1;

the front end of the threading pipe 4 is communicated and butted with the rear end of the protective cylinder 1; the rear end of the threading pipe 4 is communicated and butted on an air outlet of the wind tunnel; an air duct 5 externally connected with a high-pressure air source is inserted into the threading tube 4.

The working principle is as follows: when a ground heat-proof test is carried out in an electric arc wind tunnel, an observation camera 3 which is internally arranged in the electric arc wind tunnel is required to be used for observing the model ablation condition in the wind tunnel and the operation condition of various devices in the wind tunnel in real time, firstly, a protective barrel 1 is sleeved on the outer side of the observation camera 3 to be used as a high-temperature-proof protective layer, when the test is carried out, the inner part of the electric arc wind tunnel is filled with high-temperature gas, so that the temperature of the whole protective barrel 1 is rapidly increased, the durability of the observation glass 2 and the observation camera 3 is seriously damaged, at the moment, high-pressure gas which is used as cooling gas is pumped into a threading pipe 4 by using a high-pressure gas source, the high-pressure gas enters an inner cavity of the protective barrel 1 and then fully cools the observation glass 2 and the observation camera 3 (particularly a lens 31), the cooled waste gas is discharged from the rear end of the threading pipe 4 again to be discharged into the atmosphere outside the wind tunnel, and air-cooled airflow circulation is realized.

In the design, the observation camera 3 can be directly arranged in the protective cylinder 1, so that the assembly and disassembly are convenient, and the protection effect is good; because the wind tunnel is a closed test chamber, the threading pipe 4 is used as a middle pipe fitting for communicating the whole protective cylinder 1 with the outside of the wind tunnel, thereby not only playing a role of discharging cooling waste gas, but also simultaneously leading external related cables to be capable of extending into the protective cylinder 1 through the threading pipe 4, such as a signal cable 30 butted with the observation camera 3 and an air duct 5 inserted and laid; can stably squeeze into whole protection section of thick bamboo 1 with outside cooling gas through high pressurized air source, realize stable circulation forced air cooling to the inner chamber of protection section of thick bamboo 1, take away the heat rapidly, convenient controllable, configuration low cost, simple to operate has greatly expanded the functionality and the suitability of this device.

In the technical scheme, the device also comprises a water cooling cavity 6; the water cooling cavity 6 is arranged around the outer side of the protective cylinder 1; a water inlet pipe 61 and a water outlet pipe 62 are respectively arranged on two sides of the shell of the water cooling cavity 6; the water inlet pipe 61 and the water outlet pipe 62 are respectively provided with a water inlet connector 611 and a water outlet connector 621 which are externally threaded and sealed in a conical manner; the design pressure of the whole cooling water channel formed among the water inlet pipe 61, the water cooling cavity 6 and the water outlet pipe 62 is 4 MPa.

The working principle is as follows: in the design, cooling water is introduced into the water inlet pipe 61, the whole cooling water can surround the whole water-cooling cavity 6 to fully cool the whole protection cylinder 1, and finally the cooling water is led out from the water outlet pipe 62 to form a cooling effect of circulating water cooling, so that the whole protection cylinder 1 can be primarily cooled to a large extent; the forced air cooling that 5 air ducts inflated in the cooperation, the forced air cooling's of such outer water-cooling inlayer device is showing and has promoted the cooling effect to protection section of thick bamboo 1 inside, and 4 MPa's design pressure has guaranteed that the cooling water is stable at the circulation effect of protection section of thick bamboo 1, and the cooling effect is better.

In the technical scheme, the front end of the protective cylinder 1 is provided with a front cover assembly 7; the front cover assembly 7 comprises a cartridge case 71; the observation glass 2 is clamped and fixed in the middle of the inner ring of the cylinder shell 71; a first butt joint ring 72 is integrally arranged on the outer side of the cylinder shell 71; a second butt joint ring 73 which is butted against the first butt joint ring 72 is integrally arranged at the end part of the shell of the water cooling cavity 6; the detachable connection is formed by using a plurality of first fixing bolts 731 which are inserted through the first docking ring 72 and the second docking ring 73.

The working principle is as follows: in this kind of design, protecgulum assembly 7 is as the encapsulation part of whole protection section of thick bamboo 1 front end, can stabilize fixed assembly observation glass 2, stabilizes fixed butt joint to the shell of water-cooling chamber 6 simultaneously, and convenient loading and unloading have improved the wholeness of device, have simplified the configuration of a plurality of removable subassemblies to reach and can accomplish the maintenance of observation camera 3 and the change work of observing glass 2 fast at the scene.

In the above technical solution, the inner wall of the cylinder shell 71 is integrally provided with a support ring 74; the observation glass 2 is disc-shaped and clamped against the front end of the support ring 74; a circle of first sealing grooves 741 is arranged on the front end face of the support ring 74; a first seal ring 742 is inserted into the first seal groove 741.

The working principle is as follows: in this design, the support ring 74 is used as a mechanism for supporting and placing the observation glass 2, so as to ensure the stable support of the observation glass 2 and facilitate the assembly and disassembly; the first sealing ring 741 is clamped into the first sealing groove 742, so that the adhesion between the observation glass 2 and the whole front cover assembly 7 (the support ring 74) can be ensured to be tighter, and the sealing effect is better, so that the heat insulation effect is improved to a certain extent, and the observation glass 2 is better protected.

In the above technical solution, the front end of the cylinder shell 71 is provided with an internal thread cavity 75; a compression nut 76 is connected to the inner thread cavity 75 through threads; a clamping circular groove 77 is formed between the rear end of the internal thread cavity 75 and the support ring 74; the inner diameter of the clamping circular groove 77 is smaller than the inner thread cavity 75 and larger than the support ring 74; the observation glass 2 is of a disc structure matched with the clamping circular groove 77; after the observation glass 2 is clamped into the clamping circular groove 77, the observation glass is screwed and compressed by the compression nut 76 to realize fixation.

The working principle is as follows: in this kind of design, gland nut 76 is a fixing device who has top cap and outside screw thread, the spiro union that can be fine is in the internal thread chamber 75 of cartridge case 71 front end, thereby it is spacing to carry out annular stable the compressing tightly to whole front end of observing glass 2, then through setting up a joint circular slot 77 again, make discoid observation glass 2 can imbed the chucking better in the inner circle of cartridge case 71, improve the holistic leakproofness and the stability of device, and simultaneously, only use this single part of gland nut 76 as the part that compresses tightly observation glass 2, thereby connection modes such as use screw flange have been solved, it is too many to appear the part, dismantle complicated scheduling problem.

In the above technical solution, an annular tetrafluoro pad 78 is disposed between the compression nut 76 and the observation glass 2.

The working principle is as follows: in this design, cushioning is performed by cushioning the tetrafluoro pad 78 annularly on the pad between the pressure nut 76 and the observation glass 2, thereby preventing the pressure nut 76 from crushing the observation glass 2.

In the above technical solution, two rings of second seal grooves 79 are arranged between the cylinder shell 71 and the outer shell of the water-cooling cavity 6; two circles second seal grooves 79 are respectively provided with a second seal ring 791.

The working principle is as follows: in this design, two lateral second sealing rings 791 are used for sealing between the front cover assembly 7 (the cylinder shell 71) and the water cooling cavity 6 shell, so that the heat insulation and the sealing performance of the whole device can be further improved, and the effect of the subsequent cooling operation is improved.

In the above technical solution, the device further comprises a bracket 8 for fixing the observation camera 3; the bracket 8 is specifically a fixing plate 81 arranged on two sides of the inner wall of the protective cylinder 1; the two fixing plates 81 extend inwards; the two sides of the observation camera 3 are integrally provided with butt-joint plates 82; the two abutting plates 82 respectively abut against the two fixing plates 81, and then are fixed by two second fixing bolts 83.

The working principle is as follows: in this kind of design, two fixed plates 81 in the protective barrel 1 can be steadily lapped with the butt plate 82 at the both ends of the observation camera 3, and then use a plurality of second fixing bolts 83 to fix, and the loading and unloading are convenient, and the support installation to the observation camera 3 is more stable.

In the above technical solution, the lower end of the inner wall of the protection cylinder 1 is transversely provided with a limit block 50; the limiting block 50 is provided with a limiting groove 51 which is matched and embedded with the air outlet end of the air duct 5; an opening 52 is formed at one end of the limiting groove 51.

The working principle is as follows: in this kind of design, can be with whole air duct 5 end joint of giving vent to anger the end in the spacing groove 51 of horizontal setting for the end of giving vent to anger of air duct 5 can not be in disorder when the blowout high-pressure gas, thereby causes the interference to the camera lens 31 of observing camera 3.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art. While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. A high temperature vacuum camera protective case, comprising:

a protective cylinder built in the wind tunnel; observation glass is detachably arranged at the front end of the protective cylinder; an observation camera is fixedly arranged inside the protective cylinder;

the front end of the threading pipe is communicated and butted with the rear end of the protective cylinder; the rear end of the threading pipe is communicated and butted on an air outlet of the wind tunnel; an air duct externally connected with a high-pressure air source is inserted into the threading tube.

2. The high temperature vacuum camera protective case of claim 1, further comprising a water-cooled cavity; the water cooling cavity is arranged on the outer side of the protective cylinder in a surrounding manner; a water inlet pipe and a water outlet pipe are respectively arranged on two sides of the shell of the water cooling cavity; the water inlet pipe and the water outlet pipe are respectively provided with a water inlet joint and a water outlet joint which are externally provided with threads and sealed in a conical shape; the design pressure of the whole cooling water channel formed among the water inlet pipe, the water cooling cavity and the water outlet pipe is 4 MPa.

3. A high temperature vacuum camera protective case according to claim 2, wherein the protective cylinder is provided with a front cover assembly at the front end; the front cover assembly comprises a cylinder shell; the observation glass is clamped and fixed in the middle of the inner ring of the cylinder shell; a first butt joint ring is integrally arranged on the outer side of the cylinder shell; a second butt joint ring which is abutted and butted with the first butt joint ring is integrally arranged at the end part of the water-cooling cavity shell; through using a plurality of first fixing bolts to wear to establish on first butt joint circle and second butt joint circle, form and dismantle the connection.

4. A high temperature vacuum camera protective case according to claim 3, wherein the inner wall of the cylinder shell is integrally provided with a support ring; the observation glass is disc-shaped and clamped against the front end of the support ring; a circle of first sealing groove is formed in the end face of the front end of the support ring; a first sealing ring is embedded in the first sealing groove.

5. A high temperature vacuum camera protective case according to claim 3, wherein the front end of the cylinder case is provided with an internal threaded cavity; a compression nut is connected to the inner thread cavity through threads; a clamping circular groove is formed between the rear end of the internal thread cavity and the support ring; the inner diameter of the clamping circular groove is smaller than the inner thread cavity and larger than the support ring; the observation glass is of a disc structure matched with the clamping circular groove; and after the observation glass is clamped into the clamping circular groove, the observation glass is screwed and compressed by the compression nut to realize fixation.

6. A high temperature vacuum camera protective case according to claim 5, wherein an annular tetrafluoro pad is disposed between the compression nut and the sight glass.

7. The protective case of a high temperature vacuum camera of claim 3, wherein two rings of second sealing grooves are provided between the cylinder case and the water cavity housing; and second sealing rings are respectively arranged in the second sealing grooves.

8. A high temperature vacuum camera protective case according to claim 1, further comprising a bracket for securing a viewing camera; the support is specifically a fixing plate arranged on two sides of the inner wall of the protective cylinder; the two fixing plates extend inwards; butt joint plates are integrally arranged on two sides of the observation camera; and the two butt joint plates are respectively abutted against the two fixing plates and then are fixedly penetrated by two second fixing bolts.

9. The protective shell for a high-temperature vacuum camera as claimed in claim 1, wherein a limiting block is transversely arranged at the lower end of the inner wall of the protective cylinder; the limiting block is provided with a limiting groove which is matched and embedded with the air outlet end of the air guide pipe; an opening is formed in one end of the limiting groove.