CN204293733U - A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system - Google Patents
A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system Download PDFInfo
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- CN204293733U CN204293733U CN201420722033.2U CN201420722033U CN204293733U CN 204293733 U CN204293733 U CN 204293733U CN 201420722033 U CN201420722033 U CN 201420722033U CN 204293733 U CN204293733 U CN 204293733U
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- pressure control
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- control pipe
- tube connector
- throttle
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Abstract
The utility model relates to a kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system, compared with prior art solves the defect that in current-limiting apparatus, pressure regulation part cannot be changed.In the utility model, tube connector A to be enclosed within pressure control pipe A and back-up ring A is against on bulge loop A, and the external screw thread A that the internal thread A of tube connector A is arranged on throttle pipe is against on throttle pipe by back-up ring A by pressure control pipe A there being one end of pressure regulation part A; Tube connector B is enclosed within pressure control pipe B and back-up ring B is against on bulge loop B, and the external screw thread B that the internal thread B of tube connector B is arranged on throttle pipe is against pressure control pipe B there being one end of pressure regulation part B on throttle pipe by back-up ring B.The utility model adopts demountable structure, according to the reasonably combined pressure control pipe of traffic requirement, thus can realize the object changing different pressure regulation part.
Description
Technical field
The utility model relates to aircraft fire suppression system technical field, specifically a kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system.
Background technology
Have two cover fire extinguishing systems in aircraft, high speed fire extinguishing system and low speed fire extinguishing system, its high speed fire extinguishing system is used for discharging extinguishing chemical rapidly, extinguishes fire timely and effectively; Low speed fire extinguishing system then works after high speed fire extinguishing system uses, and adopts lower extinguishing chemical rate of release, ensures that the agent concentration of fire area maintains certain value all the time within a period of time, prevents the resume combustion of fire area.In low speed fire extinguishing system, liquid extinguishing chemical is stored in the fire-suppression bottle with nitrogen pressurising, and when extinguishing chemical sprays, liquid extinguishing chemical enters fire extinguishing system through siphon pipe, and controls flow by current-limiting apparatus.Because extinguishing chemical release flow is less, therefore still very large by the manifold pressure before throttle pipe, extinguishing chemical is in a liquid state and has lower flow velocity, therefore can design the release of extinguishing chemical low speed according to poiseuille theorem and blocked flow theory.In view of the special physical property of extinguishing chemical in aircraft fire suppression system, traditional current-limiting apparatus is difficult to use in low speed fire extinguishing system.
Though have portion of techniques proposition abroad for the current-limiting apparatus of aircraft low speed fire extinguishing system, two pressure regulation parts, by pressure regulation part having the design of micropore, are designed the two ends at throttle pipe by respectively, make it can meet the particularity of extinguishing chemical in aircraft fire suppression system.But for the low speed fire extinguishing system under different volumes and different environment for use, the pressure of the required adjustment of its throttle pipe is not identical yet, and the pipeline pressure of adjustment throttle pipe then needs to be realized based on poiseuille theorem and blocked flow theory by the parameter such as micropore size, pitch-row on adjustment pressure regulation part.And this current-limiting apparatus its adopt welded seal process, can not dismantle, the pressure regulation part of its inside is all shaping fixing.Owing to cannot change the pressure regulation part of different micropore glass beads, therefore for the pipeline pressure that throttle pipe is different, current-limiting apparatus needs to carry out different customizations.Current-limiting apparatus after customization can only be applicable to certain environment for use, and cannot be applied to other environments for use, equipment interoperability is poor, causes device fabrication high cost.How developing a kind of pressure regulation part of can changing uses the aircraft low speed fire extinguishing system current-limiting apparatus of needs to become the technical problem being badly in need of solution to meet varying environment.
Utility model content
The purpose of this utility model is to solve the defect that in prior art, in current-limiting apparatus, pressure regulation part cannot be changed, and provides a kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system to solve the problems referred to above.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system, comprise throttle pipe, pressure control pipe A and pressure control pipe B, left chamber and right chamber is divided in described throttle pipe, communicated by throttle orifice between left chamber and right chamber, the inner circle of described pressure control pipe A one end is installed with pressure regulation part A, pressure regulation part A is provided with several micropores
Also comprise tube connector A and tube connector B, the inner circle of described tube connector A one end is provided with internal thread A, the inner circle of the tube connector A other end is provided with back-up ring A, the structure of described tube connector B is identical with tube connector A, the cylindrical of described pressure control pipe A is provided with the bulge loop A around cylindrical, the structure of described pressure control pipe B is identical with pressure control pipe A, and the position described throttle pipe cylindrical being positioned at left chamber is provided with external screw thread A, and position throttle pipe cylindrical being positioned at right chamber is provided with external screw thread B;
Tube connector A is enclosed within pressure control pipe A and back-up ring A is against on bulge loop A, and the external screw thread A that the internal thread A of tube connector A is arranged on throttle pipe is against on throttle pipe by back-up ring A by pressure control pipe A there being one end of pressure regulation part A; Tube connector B is enclosed within pressure control pipe B and back-up ring B is against on bulge loop B, and the external screw thread B that the internal thread B of tube connector B is arranged on throttle pipe is against pressure control pipe B there being one end of pressure regulation part B on throttle pipe by back-up ring B.
Also comprise sealing ring A and sealing ring B, the cylindrical described pressure control pipe A being positioned at pressure regulation part A one end is provided with groove A, and sealing ring A is arranged on groove A; The cylindrical that described pressure control pipe B is positioned at pressure regulation part B one end is provided with groove B, and sealing ring B is arranged on groove B.
Described left chamber is taper, and right chamber is cylindrical.
beneficial effect
A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system of the present utility model, compared with prior art adopts demountable structure, according to the reasonably combined pressure control pipe of traffic requirement, thus can realize the object changing different pressure regulation part.By selecting the suitable control of pressure regulation part realization to extinguishing chemical rate of release, making extinguishing chemical can maintain certain flow within certain period, keeping the concentration in fire extinguishing region all the time more than certain value, having ensured validity and the stability of aircraft low speed fire extinguishing system.There is cheap for manufacturing cost, long service life, highly versatile, reusable advantage.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present utility model;
Fig. 2 is the sectional stereogram of pressure control pipe A in the utility model;
Fig. 3 is the sectional stereogram of tube connector A in the utility model;
Fig. 4 is the sectional stereogram of throttle pipe in the utility model;
Fig. 5 is the structure sectional view of pressure control pipe A in the utility model;
Fig. 6 is the structure sectional view of tube connector A in the utility model;
Fig. 7 is the structure sectional view of throttle pipe in the utility model;
Wherein, 1-pressure control pipe A, 2-pressure control pipe B, 3-tube connector A, 4-throttle pipe, 5-tube connector B, 6-sealing ring A, 7-sealing ring B, 11-pressure regulation part A, 12-micropore, the left chamber of 13-bulge loop A, 14-groove A, 21-pressure regulation part B, 23-bulge loop B, 24-groove B, 31-internal thread A, 32-back-up ring A, 41-, the right chamber of 42-, 43-throttle orifice, 44-external screw thread A, 45-external screw thread B, 51-internal thread B, 52-back-up ring B.
Detailed description of the invention
For making to have a better understanding and awareness architectural feature of the present utility model and effect of reaching, coordinating detailed description in order to preferred embodiment and accompanying drawing, being described as follows:
As shown in Figure 1, a kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system described in the utility model, comprises throttle pipe 4, pressure control pipe A1 and pressure control pipe B2.Be divided into left chamber 41 and right chamber 42 in throttle pipe 4, communicated between left chamber 41 and right chamber 42 by throttle orifice 43, throttle orifice 43 is convergent expansion section discharge orifice, plays the effect to extinguishing chemical current limliting.The inner circle of pressure control pipe A1 one end is installed with pressure regulation part A11, pressure regulation part A11 is arranged on by the mode of prior art in the inner circle of pressure control pipe A1, namely, in the whole inner circle covering on pressure control pipe A1, liquid or gas then must pass through pressure regulation part A11 by pressure control pipe A1.Pressure regulation part A11 plays and regulates pressure effect, and pressure regulation part A11 is provided with several micropores 12, is reached the effect of pressure regulation by the design of micropore 12.
As shown in Figure 3 and Figure 6, tube connector A3 or tube connector B5 is used for the connection of throttle pipe 4 and pressure control pipe A1 or pressure control pipe B2, thus reaches dismountable effect.The inner circle of tube connector A3 one end is provided with internal thread A31, and the inner circle of the tube connector A3 other end is provided with back-up ring A32, and back-up ring A32 is used for coordinating with the bulge loop A13 of pressure control pipe A1.The structure of tube connector B5 is identical with tube connector A3, is the application of two tube connectors at throttle pipe 4 two ends diverse location.As shown in Figure 2 and Figure 5, the cylindrical of pressure control pipe A1 is provided with the bulge loop A13 around cylindrical, bulge loop A13 is around the cylindrical one week of pressure control pipe A1, can integrally formed with the cylindrical of pressure control pipe A1 (bulge loop A13 and pressure control pipe A1 be structure as a whole), also can be fixedly mounted on by other means on the cylindrical of pressure control pipe A1.The structure of pressure control pipe B2 is identical with pressure control pipe A1, same is the application of two pressure control pipes at throttle pipe 4 two ends diverse location, pressure control pipe is arranged on throttle pipe 4 two ends respectively by two tube connectors, can be theoretical according to poiseuille theorem and blocked flow by pressure regulation part A11 and pressure regulation part B21() regulate the conversion of pressure, and then reach the object of accurate flow control.As shown in figs. 4 and 7, position throttle pipe 4 cylindrical being positioned at left chamber 41 is provided with external screw thread A44, and external screw thread A44 is used for and internal thread A31 matches; Position throttle pipe 4 cylindrical being positioned at right chamber 42 is provided with external screw thread B45, and external screw thread B45 is used for and internal thread B51 matches.
As shown in Figure 1, tube connector A3 is enclosed within pressure control pipe A1 and back-up ring A32 is against on bulge loop A13, and the back-up ring A32 of tube connector A3 can cause pressure control pipe A1 to move against bulge loop A13 in one direction.The external screw thread A44 that the internal thread A31 of tube connector A3 is arranged on throttle pipe 4 is against pressure control pipe A1 there being one end of pressure regulation part A11 on throttle pipe 4 by back-up ring A32, the one end of pressure control pipe A1 installing pressure regulation part A11 is connected on throttle pipe 4.Installed by screw thread between tube connector A3 and throttle pipe 4, under the back-up ring A32 of tube connector A3 drives, promote bulge loop A13(pressure control pipe A1) toward the motion of throttle pipe 4 direction, thus pressure control pipe A1 location is connected on throttle pipe 4.In like manner, at the other end of throttle pipe 4, tube connector B5 is enclosed within pressure control pipe B2 and back-up ring B52 is against on bulge loop B23, and one end that pressure control pipe B2 raises casting die B21 is against on throttle pipe 4 by back-up ring B52 by the external screw thread B45 that the internal thread B51 of tube connector B5 is arranged on throttle pipe 4.Installed by screw thread between tube connector B5 and throttle pipe 4, under the back-up ring B52 of tube connector B5 drives, promote bulge loop B23(pressure control pipe B2) toward the motion of throttle pipe 4 direction, thus pressure control pipe B2 location is connected on the other end of throttle pipe 4.
In order to ensure the sealing of pressure control pipe A1, pressure control pipe B2 and throttle pipe 4, sealing ring A6 and sealing ring B7 can also be comprised.Cylindrical pressure control pipe A1 being positioned at pressure regulation part A11 one end is provided with groove A14, and groove A14 is used for fixed seal ring A6, and sealing ring A6 is arranged on groove A14.Promote pressure control pipe A1 by tube connector A3, sealing ring A6 is against on throttle pipe 4, realizes good sealing.The cylindrical that pressure control pipe B2 is positioned at pressure regulation part B21 one end is provided with groove B24, and sealing ring B7 is arranged on groove B24.Promote pressure control pipe B2 by tube connector B5, sealing ring is against on throttle pipe 4, realizes good sealing.Pressure control pipe A1, pressure control pipe B2 and throttle pipe 4 realize sealing good between each assembly by sealing ring A6 and sealing ring B7.Sealing ring A6 and sealing ring B7 is O RunddichtringO, adopts corrosion-resistant material.In order to increase the pressure regulating performance of pressure regulation part B21, be more conducive to the pressure regulation accuracy of throttle orifice 43 to pressure regulation part B21, left chamber 41 is taper, and right chamber 42 is cylindrical.Throttle orifice 43 can be arrived smoothly better from left chamber 41, from throttle orifice 43 out after can arrive pressure regulation part B21 through right chamber 42 better.
When reality uses, when extinguishing chemical flows to pressure control pipe B2 from pressure control pipe A1, extinguishing chemical is respectively successively by pressure control pipe A1, throttle pipe 4 and pressure control pipe B2.Extinguishing chemical can produce pressure drop after by the pressure regulation part A11 of pressure control pipe A1, and voltage drop value can obtain according to Poiseuille's law and specific experiment correction, and extinguishing chemical is still mainly liquid state in pressure control pipe A1.Extinguishing chemical enters throttle pipe 4 after step-down, and due to the metering function of the throttle orifice 43 in throttle pipe 4, flow maintains certain value.Extinguishing chemical is after throttle orifice 43, to gasify rapidly at throttle orifice 10 end because pressure declines rapidly for avoiding extinguishing chemical, and then damage parts and affect flow-control, throttle pipe 4 other end Bonding pressure control valve B2, by the control to pressure, make throttle orifice 43 end maintain certain pressure, extinguishing chemical, after pressure control pipe B2, is finally discharged in the fire-fighting pipeline of low pressure fire extinguishing system.Running into different environment for use, when needing the pressure changing throttle pipe 4 two ends, the replacing of pressure control pipe can carried out.Tube connector A3 or tube connector B5 is rotated from throttle pipe 4 and takes out, back-up ring A32 or back-up ring B52 cancels the restriction to bulge loop A13 or bulge loop B23, thus the pressure control pipe having different model pressure regulation part can be changed, by the fixed installation of tube connector and throttle pipe 4, pressure control pipe is spacing again, thus realize the conversion of different pressures value.
More than show and describe general principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; the just principle of the present utility model described in above-described embodiment and description; under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.
Claims (3)
1. the detachable current-limiting apparatus for aircraft low speed fire extinguishing system, comprise throttle pipe (4), pressure control pipe A(1) and pressure control pipe B(2), left chamber (41) and right chamber (42) are divided in described throttle pipe (4), communicated by throttle orifice (43) between left chamber (41) and right chamber (42), described pressure control pipe A(1) one end inner circle on be installed with pressure regulation part A(11), pressure regulation part A(11) be provided with several micropores (12), it is characterized in that:
Also comprise tube connector A(3) and tube connector B(5), described tube connector A(3) inner circle of one end is provided with internal thread A(31), tube connector A(3) inner circle of the other end is provided with back-up ring A(32), described tube connector B(5) structure and tube connector A(3) identical, described pressure control pipe A(1) cylindrical be provided with bulge loop A(13 around cylindrical), described pressure control pipe B(2) structure and pressure control pipe A(1) identical, the position described throttle pipe (4) cylindrical being positioned at left chamber (41) is provided with external screw thread A(44), position throttle pipe (4) cylindrical being positioned at right chamber (42) is provided with external screw thread B(45),
Tube connector A(3) be enclosed within pressure control pipe A(1) upper and back-up ring A(32) be against bulge loop A(13) on, tube connector A(3) internal thread A(31) be arranged on the external screw thread A(44 of throttle pipe (4)) upper and by back-up ring A(32) by pressure control pipe A(1) on have pressure regulation part A(11) one end be against on throttle pipe (4); Tube connector B(5) be enclosed within pressure control pipe B(2) upper and back-up ring B(52) be against bulge loop B(23) on, tube connector B(5) internal thread B(51) be arranged on the external screw thread B(45 of throttle pipe (4)) upper and by back-up ring B(52) by pressure control pipe B(2) on have pressure regulation part B(21) one end be against on throttle pipe (4).
2. a kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system according to claim 1, it is characterized in that: also comprise sealing ring A(6) and sealing ring B(7), described pressure control pipe A(1) on be positioned at pressure regulation part A(11) cylindrical of one end is provided with groove A(14), sealing ring A(6) be arranged on groove A(14) on; Described pressure control pipe B(2) be positioned at pressure regulation part B(21) cylindrical of one end is provided with groove B(24), sealing ring B(7) be arranged on groove B(24) on.
3. a kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system according to claim 1, is characterized in that: described left chamber (41) is taper, and right chamber (42) are for cylindrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420722033.2U CN204293733U (en) | 2014-11-27 | 2014-11-27 | A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420722033.2U CN204293733U (en) | 2014-11-27 | 2014-11-27 | A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system |
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| Publication Number | Publication Date |
|---|---|
| CN204293733U true CN204293733U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420722033.2U Expired - Fee Related CN204293733U (en) | 2014-11-27 | 2014-11-27 | A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system |
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| CN (1) | CN204293733U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104436491A (en) * | 2014-11-27 | 2015-03-25 | 中国科学技术大学先进技术研究院 | Detachable flow limiting device for low-speed fire extinguishing system of aircraft |
-
2014
- 2014-11-27 CN CN201420722033.2U patent/CN204293733U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104436491A (en) * | 2014-11-27 | 2015-03-25 | 中国科学技术大学先进技术研究院 | Detachable flow limiting device for low-speed fire extinguishing system of aircraft |
| CN104436491B (en) * | 2014-11-27 | 2017-09-05 | 中国科学技术大学先进技术研究院 | A kind of detachable current-limiting apparatus for aircraft low speed fire extinguishing system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150429 Termination date: 20191127 |
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| CF01 | Termination of patent right due to non-payment of annual fee |