CN215415264U

CN215415264U - Railway vehicle interior trim limit oxygen index testing equipment

Info

Publication number: CN215415264U
Application number: CN202121825014.9U
Authority: CN
Inventors: 刘小松; 李峥; 孟令鑫; 孙加洁; 罗文华; 江溪; 赵永花
Original assignee: Jiaotong Railway Inspection And Certification Changzhou Co ltd
Current assignee: Jiaotong Railway Inspection And Certification Changzhou Co ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2022-01-04
Anticipated expiration: 2031-08-05

Abstract

The utility model relates to a railway vehicle interior limit oxygen index testing device, which comprises a base, a clamping component and an ignition component, wherein the clamping component and the ignition component are arranged on the base, the clamping component comprises a fixed sleeve, a movable sleeve and a flow equalizing plate, the support, the sample presss from both sides and elastic component, the lower extreme and the sealed fixed connection of base of fixed cover, set up the air inlet that communicates with the inner chamber of fixed cover on the base, sealed the accepting in the inside of fixed cover of movable sleeve slidable, flow equalization board fixed mounting is at the lower extreme of movable sleeve, evenly be provided with a plurality of through-holes on the flow equalization board, the lower extreme and the base fixed connection of support, the support runs through the setting of flow equalization board and relative flow equalization board is mobile, sample clamp and support fixed connection, the fixed cover in outside of movable sleeve is equipped with supports and holds the ring, elastic component locates telescopically along the slip direction of movable sleeve supports and holds between ring and the fixed cover, the subassembly of igniteing includes the flame thrower of movably locating the sample clamp top. The utility model is convenient to operate, has accurate test result and is convenient to popularize and use.

Description

Railway vehicle interior trim limit oxygen index testing equipment

Technical Field

The utility model relates to the technical field of flame retardance tests, in particular to a railway vehicle interior trim limit oxygen index test device.

Background

Nowadays, the rail transit brings great convenience for people's trip, and along with the railway vehicle is frequently used by people, the various safe in utilization problems of railway vehicle also more and more are valued, wherein, the fire behaviour of the interior trim of the carriage is directly related to the life and property safety of drivers and passengers.

The interior trim with good flame retardant property can strive for enough escape space for drivers and passengers when a fire disaster happens, and it is necessary to test the flame retardant property of the interior trim of the carriage. The limiting oxygen index is an important index for showing the good and bad flame retardant property, and is used for measuring the minimum oxygen concentration required for just maintaining the combustion of a sample for a specified time or distance in an oxygen-nitrogen mixed gas flow under specified test conditions. Therefore, in the manufacture of rail vehicles, it is generally necessary to perform a limiting oxygen index test on a car interior sample.

During the limit oxygen index test, fix the interior trim sample on the base earlier, then establish the outside at the interior trim sample with the burning section of thick bamboo cover, then, flow through to oxygen, nitrogen gas mixture from bottom to top, light the sample top, time, when reaching the target time, observe the length that the sample burnt to this judges whether the limit oxygen index of interior trim sample reaches standard. In the testing process, each time the combustion cylinder is sleeved outside the interior sample, the connection part of the bottom of the combustion cylinder and the base needs to be subjected to air sealing treatment, so that the operation is very inconvenient, the preparation time before the test is prolonged, and the testing efficiency is reduced; meanwhile, the oxygen-nitrogen mixed gas flowing from bottom to top is difficult to uniformly penetrate through the combustion cylinder, so that different parts of the interior trim sample are difficult to ensure to be approximately under the same oxygen concentration during combustion, and the test result is not accurate enough.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the defects in the prior art, the railway vehicle interior limit oxygen index testing equipment which is convenient for clamping interior samples and ensures the testing result is provided.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a railway vehicle interior limit oxygen index testing device comprises a base, and a clamping assembly and an ignition assembly which are installed on the base, wherein the clamping assembly comprises a fixed sleeve, a movable sleeve, a flow equalizing plate, a support, a sample clamp and an elastic piece, the lower end of the fixed sleeve is fixedly connected with the base in a sealing manner, the base is provided with an air inlet communicated with an inner cavity of the fixed sleeve, the movable sleeve is slidably and hermetically accommodated in the fixed sleeve, the flow equalizing plate is fixedly installed at the lower end of the movable sleeve, a plurality of through holes are uniformly formed in the flow equalizing plate, the lower end of the support is fixedly connected with the base, the support penetrates through the flow equalizing plate and is movable relative to the flow equalizing plate, the sample clamp is fixedly connected with the support, the outer part of the movable sleeve is fixedly sleeved with a supporting ring, and the elastic piece is telescopically arranged between the supporting ring and the fixed sleeve along the sliding direction of the movable sleeve, the ignition assembly comprises a flame thrower which is movably arranged above the sample clamp, and the movable sleeve can be slid to be sleeved outside the sample clamp or exposed outside the movable sleeve.

Further, fixed cover reaches the movable sleeve all is the hollow cylindrical structure that both ends link up, the lower terminal surface of fixed cover with the fixed sealing connection of the up end of base, the movable sleeve with fixed cover is mutually supported, the outer wall of movable sleeve with the inner wall of fixed cover is laminated mutually.

Furthermore, a sealing element is sleeved on the outer wall of the movable sleeve and abuts against the inner wall of the fixed sleeve.

Furthermore, the flow equalizing plate is of a circular plate-shaped structure, the flow equalizing plate is fixedly installed on the lower end face of the movable sleeve in a matched mode, a through hole is formed in the center of the flow equalizing plate, the support is of a rod-shaped structure, and the support can slidably penetrate through the through hole.

Further, the fixed sleeve and the movable sleeve are both made of glass materials.

Furthermore, the upper end of the elastic piece is connected with the abutting ring and elastically abutted against the abutting ring, and the lower end of the elastic piece is connected with the upper end face of the fixed sleeve and elastically abutted against the upper end face of the fixed sleeve.

Further, the fixed cover in outside of fixed cover is equipped with solid fixed ring, gu be provided with two hasps on the fixed ring relatively, the hasp with gu fixed ring rotationally connects, support to correspond on the up end of holding the ring the draw-in groove has been seted up to the hasp, the one end card of hasp can go into extremely in the draw-in groove, the draw-in groove is circular.

Further, ignition module still includes slide and telescopic link, the slide slidable locate on the base, the flame thrower is installed on the telescopic link.

Furthermore, a sliding groove is formed in the base, the sliding groove is slidably embedded in the sliding groove in a clamping mode, a lead screw is rotatably mounted on the side wall of the base, one end of the lead screw extends into the sliding groove, and the lead screw is in threaded connection with the sliding seat.

Further, the telescopic link includes dead lever and movable tube, the dead lever with slide fixed connection, the flame thrower with dead lever fixed connection, the movable tube slidable ground cover is established the outside of movable tube.

The utility model has the beneficial effects that: according to the railway vehicle interior limit oxygen index testing device, when an interior sample is clamped, the movable sleeve slides downwards relative to the fixed sleeve, so that the sample clamp is exposed outside the movable sleeve, the interior sample is conveniently clamped and fixed, meanwhile, under the action of the flow equalizing plate, oxygen and nitrogen mixed gas can uniformly flow through the interior sample, the accuracy of a testing result is ensured, and the railway vehicle interior limit oxygen index testing device is simple and convenient to operate and convenient to popularize and use.

Drawings

The utility model is further illustrated by the following figures and examples.

FIG. 1 is a schematic structural view of a railway vehicle interior limit oxygen index testing apparatus of the present invention;

FIG. 2 is a top view of a flow equalizing plate in the railway vehicle interior limit oxygen index testing apparatus shown in FIG. 1.

In the figure: 10. the device comprises a base, 101, an air inlet, 102, a sliding groove, 11, a screw rod, 20, a clamping component, 21, a fixing sleeve, 211, a fixing ring, 212, a lock catch, 22, a movable sleeve, 221, a supporting ring, 222, a sealing component, 223, a clamping groove, 23, a flow equalizing plate, 231, a through hole, 232, a through hole, 24, a support, 25, a sample clamp, 26, an elastic component, 30, an ignition component, 31, a flame thrower, 32, a sliding seat, 33, a telescopic rod, 331, a fixing rod, 332 and a sliding tube.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1 and 2, the utility model provides a railway vehicle interior trim limit oxygen index testing device, which is used for testing the limit oxygen index of an interior trim sample. The railway vehicle interior limit oxygen index testing device comprises a base 10, a clamping assembly 20 and an ignition assembly 30, wherein the clamping assembly 20 and the ignition assembly 30 are installed on the base 10, the clamping assembly 20 is used for clamping and fixing interior samples, and the ignition assembly 30 is used for igniting the interior samples.

Specifically, the clamping assembly 20 includes a fixed sleeve 21, a movable sleeve 22, a flow equalizing plate 23, a bracket 24, a sample clamp 25 and an elastic member 26, the lower end of the fixed sleeve 21 is fixedly connected with the base 10 in a sealing manner, the base 10 is provided with an air inlet 101 communicated with an inner cavity of the fixed sleeve 21, the movable sleeve 22 is slidably and hermetically accommodated in the fixed sleeve 21, the flow equalizing plate 23 is fixedly installed at the lower end of the movable sleeve 22, the flow equalizing plate 23 is uniformly provided with a plurality of through holes 231, the lower end of the bracket 24 is fixedly connected with the base 10, the bracket 24 penetrates through the flow equalizing plate 23 and is arranged movably relative to the flow equalizing plate 23, the sample clamp 25 is fixedly connected with the bracket 24, the sample clamp 25 is used for clamping an interior sample, the fixed sleeve outside the movable sleeve 22 is provided with a supporting ring 221, the elastic member 26 is telescopically arranged between the supporting ring 221 and the upper end surface of the fixed sleeve 21 along the sliding direction of the movable sleeve 22, the movable sleeve 22 can enable the movable sleeve 22 to be sleeved outside the sample clamp 25, or such that the sample holder 25 is exposed on the outside of the holster 22.

When the interior sample is required to be clamped, the movable sleeve 22 slides downwards under the action of external force, so that the sample clamp 25 is exposed outside the movable sleeve 22, then the interior sample is fixedly clamped on the sample clamp 25, and in the process, the flow equalizing plate 23 gradually moves downwards away from the sample clamp 25 under the drive of the movable sleeve 22. After the interior sample is clamped, the downward pressure on the movable sleeve 22 is relieved, the elastic piece 26 resets to push the movable sleeve 22 to move upwards together with the flow equalizing plate 23, and finally the movable sleeve 22 is completely sleeved outside the interior sample, so that the oxygen and nitrogen mixed gas entering the fixed sleeve 21 through the air inlet 101 always passes through the interior sample when passing through the movable sleeve 22 upwards, and the interior sample is ensured to be always in the environment of the oxygen and nitrogen mixed gas in the test process. When the oxygen-nitrogen mixed gas passes through the flow equalizing plate 23, the plurality of through holes 231 are uniformly formed in the flow equalizing plate, so that the oxygen-nitrogen mixed gas can uniformly pass through the flow equalizing plate 23, the concentration of the mixed gas entering the movable sleeve 22 and located at each position is basically the same, and the accuracy of a test result is further ensured.

In this embodiment, the fixed sleeve 21 and the movable sleeve 22 are made of glass materials, so that a user can observe the combustion state of the interior sample through the fixed sleeve 21 and the movable sleeve 22 conveniently.

In a specific embodiment, the fixed sleeve 21 and the movable sleeve 22 are both hollow cylindrical structures with two through ends, the lower end surface of the fixed sleeve 21 is fixedly and hermetically connected with the upper end surface of the base 10, the movable sleeve 22 is matched with the fixed sleeve 21, and the outer wall of the movable sleeve 22 is attached to the inner wall of the fixed sleeve 21, so that the leakage of the mixed gas entering the fixed sleeve 21 is effectively prevented.

In order to improve the air tightness between the fixed sleeve 21 and the movable sleeve 22, a sealing member 222 is sleeved on the outer wall of the movable sleeve 22, and the sealing member 222 abuts against the inner wall of the fixed sleeve 21. It will be appreciated that the seal 222 is made of silicone or rubber material.

The flow equalizing plate 23 is a circular plate-shaped structure, the flow equalizing plate 23 is fixedly installed on the lower end surface of the movable sleeve 22 in a matching manner, a through hole 232 is formed in the center of the flow equalizing plate 23, the support 24 is a rod-shaped structure, and the support 24 slidably penetrates through the through hole 232.

The upper end of the elastic member 26 is connected to and elastically abuts against the abutting ring 221, and the lower end of the elastic member 26 is connected to and elastically abuts against the upper end face of the fixing sleeve 21. In the present embodiment, the elastic member 26 is an external spring sleeved on the movable sleeve 22, and it is understood that in other embodiments not shown, the elastic member 26 may also be a rigid and elastic element such as a stainless steel elastic sheet or a copper elastic sheet, which is not limited herein.

In this embodiment, the fixing ring 211 is fixedly sleeved outside the fixing sleeve 21, the fixing ring 211 is relatively provided with two latches 212, the latches 212 are in a plate-shaped structure with a section shaped like "Contraband", the latches 212 are rotatably connected with the fixing ring 211, the upper end surface of the abutting ring 221 is provided with a clamping groove 223 corresponding to the latches 212, and one end of the latches 212 can be clamped into the clamping groove 223. When the movable sleeve 22 moves downwards to expose the sample clamp 25 to the outside of the movable sleeve 22, the lock catches 212 on the two sides of the fixed sleeve 21 are rotated to clamp one ends of the lock catches 212 into the clamping grooves 223, so that the movable sleeve 22 can be locked and fixed, and the movable sleeve 22 is prevented from being blocked when an interior decoration sample is clamped.

In addition, the locking groove 223 is a circular structure, so as to ensure that when the movable sleeve 22 rotates relative to the fixed sleeve 21 by a certain angle, one end of the lock catch 212 can be locked into the locking groove 223, thereby ensuring that the movable sleeve 22 and the fixed sleeve 21 can be locked with each other.

Ignition assembly 30 includes a torch 31, torch 31 being movably disposed above specimen holder 25, and torch 31 being movable in horizontal and vertical directions. When the combustion test is performed, the torch 31 is ignited, the torch 31 is moved up and down so that the lowest visible part of the flame contacts the top of the interior sample, the torch 31 is moved horizontally so that the flame covers the entire upper surface of the interior sample, and after it is confirmed that the top of the interior sample is completely ignited, the torch 31 is removed and the timing is started or the length of the interior sample burned out is observed.

Ignition assembly 30 further comprises a slide 32 and a telescopic rod 33, slide 32 being slidably mounted on base 10, and torch 31 being mounted on telescopic rod 33. When the sliding seat 32 slides, the flame thrower 31 can be driven to move horizontally, and the length of the telescopic rod 33 can be adjusted, so that the height of the flame thrower 31 can be adjusted.

Specifically, the base 10 is provided with a sliding groove 102, the sliding seat 32 is slidably inserted into the sliding groove 102, the side wall of the base 10 is rotatably provided with the lead screw 11, one end of the lead screw 11 extends into the sliding groove 102, and the lead screw 11 is in threaded connection with the sliding seat 32.

The telescopic rod 33 comprises a fixed rod 331 and a movable tube 332, the fixed rod 331 is fixedly connected with the sliding base 32, the torch 31 is fixedly connected with the fixed rod 331, the movable tube 332 is slidably sleeved outside the movable tube 332, and the movable tube 332 can slide and/or rotate relative to the fixed rod 331 so as to adjust the height and the angle of the torch 31. In addition, a bolt (not shown) is installed on the side wall of the movable sleeve 332, and one end of the bolt passes through the side wall of the movable sleeve 332 and then abuts against the fixed rod 331, so that the fixed relationship between the fixed rod 331 and the movable tube 332 is realized.

According to the railway vehicle interior limit oxygen index testing device, when an interior sample is clamped, the movable sleeve 22 slides downwards relative to the fixed sleeve 21, so that the sample clamp 25 is exposed outside the movable sleeve 22, the interior sample is conveniently clamped and fixed, meanwhile, under the action of the flow equalizing plate 23, oxygen and nitrogen mixed gas can uniformly flow through the interior sample, the accuracy of a testing result is guaranteed, and the device is simple and convenient to operate and convenient to popularize and use.

In light of the foregoing description of preferred embodiments in accordance with the utility model, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a railway vehicle interior limit oxygen index test equipment which characterized in that: the clamping assembly comprises a base, and a clamping assembly and an ignition assembly which are arranged on the base, wherein the clamping assembly comprises a fixed sleeve, a movable sleeve, a flow equalizing plate, a support, a sample clamp and an elastic piece, the lower end of the fixed sleeve is fixedly connected with the base in a sealing manner, the base is provided with an air inlet communicated with an inner cavity of the fixed sleeve, the movable sleeve is slidably and hermetically accommodated in the fixed sleeve, the flow equalizing plate is fixedly arranged at the lower end of the movable sleeve, a plurality of through holes are uniformly formed in the flow equalizing plate, the lower end of the support is fixedly connected with the base, the support penetrates through the flow equalizing plate and is movable relative to the flow equalizing plate, the sample clamp is fixedly connected with the support, the outer fixed sleeve of the movable sleeve is fixedly provided with a supporting ring, and the elastic piece is telescopically arranged between the supporting ring and the fixed sleeve along the sliding direction of the movable sleeve, the ignition assembly comprises a flame thrower which is movably arranged above the sample clamp, and the movable sleeve can be slid to be sleeved outside the sample clamp or exposed outside the movable sleeve.

2. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 1, wherein: the fixed cover reaches the movable sleeve all is the cavity cylindric structure that both ends link up, the lower terminal surface of fixed cover with the fixed sealing connection of up end of base, the movable sleeve with fixed cover is mutually supported, the outer wall of movable sleeve with the inner wall of fixed cover is laminated mutually.

3. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 2, wherein: the outer wall of the movable sleeve is sleeved with a sealing element, and the sealing element is abutted to the inner wall of the fixed sleeve.

4. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 1, wherein: the flow equalizing plate is of a circular plate-shaped structure, the flow equalizing plate is fixedly installed on the lower end face of the movable sleeve in a matched mode, a through hole is formed in the center of the flow equalizing plate, the support is of a rod-shaped structure, and the support penetrates through the through hole in a sliding mode.

5. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 1, wherein: the fixed sleeve and the movable sleeve are both made of glass materials.

6. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 1, wherein: the upper end of the elastic piece is connected with the abutting ring and elastically abutted against the abutting ring, and the lower end of the elastic piece is connected with the upper end face of the fixed sleeve and elastically abutted against the upper end face of the fixed sleeve.

7. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 6, wherein: the fixed cover in outside of fixed cover is equipped with solid fixed ring, gu be provided with two hasps on the fixed ring relatively, the hasp with gu fixed ring rotationally connects, support to correspond on the up end of holding the ring the draw-in groove has been seted up to the hasp, the one end card of hasp can go into extremely in the draw-in groove, the draw-in groove is circular.

8. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 1, wherein: ignition assembly still includes slide and telescopic link, the slide slidable is located on the base, the flame thrower is installed on the telescopic link.

9. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 8, wherein: the base is provided with a sliding groove, the sliding groove is slidably embedded in the sliding groove in a clamping mode, a screw rod is rotatably installed on the side wall of the base, one end of the screw rod extends into the sliding groove, and the screw rod is in threaded connection with the sliding seat.

10. The railway vehicle interior limit oxygen index testing apparatus as claimed in claim 8, wherein: the telescopic link includes dead lever and movable tube, the dead lever with slide fixed connection, the flame thrower with dead lever fixed connection, the cover is established slidable to the movable tube the outside of movable tube.