CN210221435U - Subway vehicle air tightness test bed - Google Patents

Abstract

The utility model discloses a subway vehicle air tightness test bed, which belongs to the technical field of air tightness detection equipment, comprises a cabinet and further comprises a first filtering device, wherein the air inlet end of the first filtering device is at least connected with an air source joint, the air outlet end of the first filtering device is connected with a pressurization pipeline and at least one air inlet pipeline in parallel, and the air outlet end of the pressurization pipeline is connected with a sliding plug door pipeline; the sliding plug door pipeline and the air inlet pipeline are both provided with the air valve group, so that the purposes that the test bed is simple to operate and operate in the air tightness test process, all parts are reasonable in arrangement, convenient to maintain and high in efficiency are achieved.

Description

Subway vehicle air tightness test bed

Technical Field

The utility model belongs to the technical field of airtight check out test set, particularly, relate to an airtight test bench of subway vehicle.

Background

The air-tight test bed is suitable for high-pressure air-tight detection tests, safety valve performance tests and correction, high-pressure gas cylinder filling and other professional production and manufacturing of products such as small valves, pipelines, underground tools and the like, and can be widely applied to the air-tight test bed in the vehicle air-tight test process so as to verify the air-tight performance of the whole vehicle.

Along with the rapid development of subway traffic, the speed of the subway vehicle is also greatly improved, and for ensuring the safe operation and the riding experience of the subway vehicle, the airtight test procedure of the vehicle is required to be added in the vehicle manufacturing process, the subway vehicle often runs in a tunnel, if the airtightness of the whole vehicle is not controlled well, the problems that the riding experience is influenced, the air flow is fluctuated, the pressure difference between the inside and the outside of the vehicle can impact the eardrum of a passenger and the like exist.

At present, equipment for detecting air tightness of subway vehicles does not have specificity and is high in cost, and the problems of complex test, complex operation, low working efficiency and the like mainly exist.

SUMMERY OF THE UTILITY MODEL

In view of this, in order to solve the above-mentioned problem that prior art exists, the utility model aims at providing a subway vehicle airtight test platform is in order to reach the test bench and operate simply in the operation of gas tightness test process, and each part is arranged rationally, and the purpose of the convenient and efficient of maintenance.

The utility model discloses the technical scheme who adopts does: the air-tight test stand for the metro vehicle comprises a cabinet and a first filtering device, wherein the air inlet end of the first filtering device is at least connected with an air source connector, the air outlet end of the first filtering device is connected with a pressurization pipeline and at least one air inlet pipeline in parallel, and the air outlet end of the pressurization pipeline is connected with a sliding plug door pipeline; and the plug sliding door pipeline and the air inlet pipeline are both provided with air valve groups.

Furthermore, the number of the air inlet pipelines is two, and the air outlet ends of the two air inlet pipelines are respectively connected to two ends of a carriage of the subway vehicle, so that the air inflation efficiency of the interior of the carriage is improved.

Furthermore, the pressure boost pipeline includes second filter equipment, booster valve and the gas holder that concatenates in proper order, the inlet end of second filter equipment is connected with first filter equipment's the end of giving vent to anger, the end of giving vent to anger of gas holder with the stopper sliding door pipe connection to the realization is carried out the pressure boost and is reached the required atmospheric pressure of the stopper sliding door in carriage to this way gas.

Further, an air leakage valve is arranged on the air storage tank; the air valve group comprises an inflation valve and a deflation valve, and the deflation valve is arranged on one side of the air outlet end of the inflation valve so as to realize inflation and deflation controllability.

Furthermore, the air outlet end of the air storage tank is connected with a one-way valve, and the other end of the one-way valve is connected with the air inlet end of the air inlet pipeline so as to secondarily collect redundant air and assist in inflating the carriage.

Furthermore, the air escape valve, the inflation valve and the deflation valve are all set as electromagnetic valves; and the plug door pipeline and the air inlet pipeline are respectively provided with a first pressure sensor and a second pressure sensor so as to realize automatic control and acquire air pressure data in real time.

The computer is arranged in the cabinet, the first switching power supply, and the I/O board and the A/D board are arranged in the computer, the first switching power supply is connected with an air release valve, each inflation valve and a deflation valve in parallel, and each inflation valve and deflation valve are connected with a contactor in series; the A/D board is connected with the first pressure sensor and the second pressure sensor, and the I/O board is connected with the control ends of the contactors, so that the electric control effect of the air escape valve, the inflation valve and the deflation valve is achieved.

Furthermore, the I/O board is provided with a second switching power supply for supplying power to the I/O board, and the A/D board is provided with a third switching power supply for supplying power to the A/D board, so that good power supply for the I/O board and the A/D board is met.

Further, still include supply circuit, the last circuit breaker that is connected with of supply circuit, scram switch and button switch have concatenated in proper order to the anodal output of circuit breaker, the power both ends of computer, first switching power supply, second switching power supply and third switching power supply are connected respectively on the negative pole output of button switch and circuit breaker.

Further, the bottom of rack is equipped with a plurality of walking wheels to guarantee that the test bench can pass the track smoothly and move to suitable position department.

The utility model has the advantages that:

1. by adopting the airtight test bed for the metro vehicle, compressed air is supplied to the first filtering device through the air supply pipe through the air source connector, the first filtering device is divided into two paths after filtering the compressed air, the air pressure is improved to 0.75MPa through the booster valve on the one path, and the compressed air is used for the plug door pipeline after being controlled by the air valve group; the other path is controlled by the air valve group and then is used for inflating the air in the carriage, so that the air supply control of the whole carriage and the sliding plug door is completed in the test process, the air tightness test of the carriage can be completed, the operation is simple, and the working efficiency is high.

2. By adopting the airtight test bed for the metro vehicle, when the pressure in the metro vehicle rises to the highest pressure set value, the air supply is stopped by feeding back the pressure sensor to the computer, the pressure is recorded, the falling time of the pressure naturally falls from the set value to the set value period is recorded, whether the falling time meets the requirement of a test outline or not is judged, and a result is recorded and output in a report form, so that the detection result can be visually displayed for a user; meanwhile, when air is supplied to the test vehicle, high pressure is provided through the plug door pipeline so as to meet the service pressure of the plug door, normal action of the plug door is guaranteed, and reliable guarantee is provided for test precision.

Drawings

FIG. 1 is a schematic view of the overall appearance structure of the airtight test stand for metro vehicles provided by the present invention;

FIG. 2 is a schematic view of the air passage structure in the airtight test stand for metro vehicles provided by the present invention;

FIG. 3 is a schematic diagram of a circuit structure in the airtight test stand for the metro vehicle provided by the present invention;

the drawings are labeled as follows:

1-cabinet, 2-computer, 3-road wheel, 4-air source joint, 5-first filter device, 6-second filter device, 7-pressure increasing valve, 8-air storage tank, 9-one-way valve, YV 1-first inflation valve, YV 2-second inflation valve, YV 3-third inflation valve, YV 4-fourth deflation valve, YV 5-fifth deflation valve, YV 6-deflation valve, YV 7-seventh deflation valve, PT 1-first pressure sensor, PT 2-second pressure sensor, K1-first contactor, K2-second contactor, K3-third contactor, K4-fourth contactor, K5-fifth contactor, K6-sixth contactor, DY 1-first switching power supply, DY 2-second switching power supply, DY 3-third switching power supply, QF 1-breaker, SB 1-emergency stop switch, SBK-button switch.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the position or the positional relationship is based on the position or the positional relationship shown in the drawings, or the position or the positional relationship that the utility model is usually placed when using, or the position or the positional relationship that the skilled person conventionally understands, or the position or the positional relationship that the utility model is usually placed when using, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or suggest that the indicated device or element must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases for a person of ordinary skill in the art; the drawings in the embodiments are provided to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Example 1

In the embodiment, a metro vehicle air tightness test bed is specifically provided, as shown in fig. 1, and includes a cabinet 1, where the cabinet 1 is used as the basic carrier, and the interior of the cabinet is used for installing various components, parts and the like to form an integral device.

As shown in fig. 2, the cabinet 1 further includes a first filtering device 5, an air inlet end of the first filtering device 5 is connected to five air source connectors 4 connected in parallel, the air source connectors 4 can adopt quick-change air source connectors, an air outlet end of the first filtering device 5 is connected in parallel to a pressurization pipeline and two air inlet pipelines, the two air inlet pipelines are divided into a first air inlet pipeline and a second air inlet pipeline, air outlet ends of the first air inlet pipeline and the second air inlet pipeline are respectively connected to two ends of a carriage of the subway vehicle and used for inflating the carriage, and an air outlet end of the pressurization pipeline is connected to a sliding plug pipeline so as to pressurize air pressure through the pressurization pipeline so as to meet the air pressure required by normal operation of a sliding plug door of the carriage, and the sliding plug pipeline is used for providing sufficient air pressure to the sliding plug door of the carriage and ensuring normal operation of the sliding plug door; and the plug sliding door pipeline and the air inlet pipeline are respectively provided with a high-pressure air valve bank and a low-pressure air valve bank. The high-pressure gas valve group comprises a first inflation valve YV1 and a seventh deflation valve YV7, the seventh deflation valve YV7 is arranged on one side of the gas outlet end of the first inflation valve YV1, and the gas outlet end of the seventh deflation valve YV7 is arranged in the atmosphere so as to deflate a pipeline where a sliding plug door of a carriage is located; the low-pressure air valve group of the first air inlet pipeline comprises a second inflation valve YV2 and a fourth deflation valve YV4, the low-pressure air valve group of the second air inlet pipeline comprises a third inflation valve YV3 and a fifth deflation valve YV5, and similarly, the fourth deflation valve YV4 is arranged on one side of the air outlet end of the second inflation valve YV 2; the fifth air release valve YV5 is arranged on one side of the air outlet end of the third air inflation valve YV3, and the air outlet ends of the fourth air release valve YV4 and the fifth air release valve YV5 are arranged in the atmosphere to release air inside the carriage.

The pressure boost pipeline is including the second filter equipment 6, booster valve 7 and the gas holder 8 that concatenate in proper order, the inlet end of second filter equipment 6 is connected with the end of giving vent to anger of first filter equipment 5, and the end of giving vent to anger of second filter equipment 6 is connected with the inlet end of booster valve 7, and the end of giving vent to anger of booster valve 7 is connected with the inlet end of gas holder 8, 8 of gas holder give vent to anger the end with stopper sliding door tube coupling be equipped with bleeder valve YV6 on the gas holder 8, open after bleeder valve YV6 for with the gas emission in the gas holder 8 to the air in the middle of, preferred, this gas holder 8's capacity is 20L.

In this embodiment, the first filtering device 5 and the second filtering device 6 both use SMC standard oil-water separators, the oil-water separators are integrated inside the cabinet 1, and can absorb condensed water, dry air and remove oil mist, the compressed air is filtered by the first oil-water separator through each air source connector 4, so as to prevent the electric elements from being damaged by the test bed water, and the compressed air is filtered again by the second oil-water separator; the parameters of the first oil-water separator are as follows: the using pressure is 1Mpa, the using temperature is-10 ℃ to 60 ℃, and the filtering precision is that the efficiency of the filter reaches 99.9 percent for the particles not less than 3 mu m; the relative humidity RH of the filtered gas is less than or equal to 10 percent, and the oil content is not more than 0.01 ppm; the pressure loss of the filtering device is less than or equal to 0.02Mpa, and the flow rate is as follows: (0.5 to 300) m.

The end of giving vent to anger of gas holder 8 is connected with check valve 9, and the other end of check valve 9 and the port connection that gathers that admits air of an air inlet pipeline and No. two air inlet pipelines, and is preferred, and this check valve 9 can adopt one-way relief pressure valve, and one-way relief pressure valve can carry the unnecessary atmospheric pressure on the stopper sliding door pipeline to the air inlet pipeline after the decompression in to supplementary aerifing in the carriage, simultaneously, also can prevent the gas reflux in an air inlet pipeline and No. two air inlet pipelines to in the stopper sliding door pipeline.

The working principle of the gas circuit is as follows:

(1) after an external air source enters a test bed (the requirement on air pressure in an air tightness test is not high, and 0.6MPa is applied), firstly, impurities and moisture in the air are filtered by a first filtering device;

(2) because the driver cab sliding plug door and the passenger compartment door are required to be subjected to air pressure tests, the filtered air is divided into two paths, the rated air pressure of the sliding plug door is 0.75MPa, one path is subjected to pressure boosting through a booster valve and an air storage tank, the air pressure is increased to 0.75MPa, the filtered air is used for the function test of a sliding plug door pipeline after being controlled by a high-pressure air valve group, and the other path is subjected to air tightness inspection because the low pressure is slowly accumulated in the air tightness whole vehicle test, so that the path two is controlled by a low-pressure air valve group and then is used for air charging in a carriage, and the air pressure required to be injected into a closed space in the;

(3) according to the test process, the air charging and discharging control of the whole vehicle and the sliding plug door is completed, the air charging valves (namely, the second air charging valve and the third air charging valve) on the first air charging pipeline and the second air charging pipeline are opened in the air charging stage, the whole air charging time is 10-20min, when the pressure in the test vehicle body reaches the highest pressure (4000Pa), the second air charging valve and the third air charging valve are closed, the gas in the vehicle starts to slowly release air and automatically discharge the pressure, and data recording is carried out in the process that the test pressure is reduced to 2600 and 1000 Pa.

Example 2

In order to realize that the airtight test stand for the metro vehicle provided in the embodiment 1 can automatically control and accurately test the airtight test data, on the basis of the embodiment 1, the following improvement scheme is provided:

as shown in fig. 3, electromagnetic valves are adopted for the air release valve YV6, the first inflation valve YV1, the second inflation valve YV2, the third inflation valve YV3, the fourth deflation valve YV4, the fifth deflation valve YV5 and the seventh deflation valve YV7, so that the opening and closing of the air release valve YV6, the first inflation valve YV1, the second inflation valve YV2, the third inflation valve YV3, the fourth deflation valve YV4, the fifth deflation valve YV5 and the seventh deflation valve YV7 can be controlled in real time in an electric control manner; be equipped with first pressure sensor PT1 and second pressure sensor PT2 on stopper sliding door pipeline and the intake pipe respectively, first pressure sensor PT1 and second pressure sensor PT 2's precision does: 1 per mill to ensure the system test precision as follows: 3 per mill; the first pressure sensor PT1 is used for detecting the air pressure value of a pipeline where the sliding plug door is located in the carriage, and the second pressure sensor PT2 is used for detecting the air pressure value in the carriage. Because the first air inlet pipeline and the second air inlet pipeline are communicated with the inside of the carriage, the second pressure sensor PT2 is arranged on the first air inlet pipeline or the second air inlet pipeline and can be located at the end of the carriage.

The computer system further comprises a computer 2 arranged in the cabinet 1, a first switching power supply DY1, an I/O board and an A/D board which are arranged in the computer 2, wherein the first switching power supply DY1 is a 24V direct-current power supply, the positive and negative output ends of the first switching power supply DY1 are connected with an air release valve YV6, a first inflation valve YV1, a second inflation valve YV2, a third inflation valve YV3, a fourth deflation valve YV4, a fifth deflation valve YV5 and a seventh deflation valve YV7 in parallel, and the first inflation valve YV1, the second inflation valve YV2, the third inflation valve YV3, the fourth deflation valve YV4, the fifth deflation valve YV5 and the seventh deflation valve YV7 are respectively provided with a first contactor K1, a second contactor K2, a third contactor K3, a fourth contactor K4, a fifth contactor K5 and a sixth contactor K6 which are connected in series; the A/D board is connected with a first pressure sensor PT1 and a second pressure sensor PT2, and the I/O board is connected with the control end of each contactor.

The I/O board is provided with a second switching power supply DY2 for supplying power to the I/O board, the second switching power supply DY2 is a 12V direct-current power supply, the positive electrode output end of the second switching power supply DY2 is connected with the I/O board, each output pin of the I/O board is connected with the control A ends of a first contactor K1, a second contactor K2, a third contactor K3, a fourth contactor K4, a fifth contactor K5 and a sixth contactor K6 respectively, and the control B ends of the contactors are connected to the negative electrode output end of a second switching power supply DY 2; the A/D board is provided with a third switch power supply DY3 for supplying power to the A/D board, the third switch power supply DY3 is a 24V direct-current power supply, the positive electrode output end of the second switch power supply DY2 is connected with the A/D board, the output end of the A/D board is respectively connected with the first pressure sensor PT1 and the second pressure sensor PT2, and the other ends of the first pressure sensor PT1 and the second pressure sensor PT2 are connected with the negative electrode output end of the third switch power supply DY 3.

Still include power supply circuit, be connected with circuit breaker QF1 on the power supply circuit, the anodal output of circuit breaker QF1 has concatenated scram switch SB1 and button switch SBK in proper order, computer 2, first switch power DY1, second switch power DY2 and third switch power DY 3's power both ends are connected respectively on button switch SBK and the negative pole output of circuit breaker QF1, and power supply circuit can adopt municipal circuit.

The bottom of rack 1 is equipped with a plurality of walking wheels 3, wherein, including two tight pulleys and two universal wheels, and the universal wheel has the locking function to realize that rack 1 can move to suitable position at will, in order to supply the user to carry out the gas tightness test.

The air tightness test bed provided by the embodiment can complete the functions of automatic inflation, automatic measurement, automatic exhaust and the like in an air tightness test, and the main working principle is as follows:

(1) the closed circuit breaker controls a working power supply of the whole test bed;

(2) the compressed air is supplied to the test bed by connecting the air supply pipe with each air source joint 4, each air source joint 4 collects the compressed air and then filters the compressed air through the first filtering device 5 to filter impurities, oil and moisture in the compressed air, and the compressed air is divided into two paths after being filtered, wherein one path of compressed air is increased to 0.75MPa after passing through the second filtering device 6, the booster valve 7 and the air storage tank 8, and is used for normal work of a sliding plug door of a carriage after being controlled by the high-pressure air valve group, and the other path of compressed air is used for air inflation in the carriage after being controlled by the low-pressure air valve groups on the first air inlet pipeline and the second air inlet pipeline; the highest pressure of the air filled in the vehicle can reach 6kPa, and the highest pressure of the air supplied through the pipeline where the sliding plug door is located can reach 0.9 MPa.

(3) Along with the continuous operation of air supply, after the pressure in the vehicle rises to a maximum pressure set value, the air supply is stopped, real-time measurement is carried out through a second pressure sensor PT2, the falling time of the pressure value in the period of naturally falling from the set value to the set value is recorded, whether the falling time meets the requirements of the test outline or not is judged, the result is recorded, and the result is output in a report form; meanwhile, through continuous air supply of the plug door pipeline, high-pressure air meeting the use pressure of the plug door is supplied to the pipeline where the plug door of the test vehicle is located.

(4) During the test, the data acquisition consists of the computer 2, the first pressure sensor PT1, the second pressure sensor PT2 and the A/D plate, and the data acquisition can acquire the pressure data of the test point at different times according to the set operating parameters and then represent the pressure data by curves in coordinates (time and pressure).

The computer 2 in the embodiment has a good human-computer interface, adopts the operation of a keyboard and a mouse, and has the hard disk capacity not less than 120 Gb; the system software of the computer 2 adopts windows7 Chinese version, and accords with the requirements of Chinese market, the measurement and control software adopts modular design, VB (VC) and above language programming. The computer 2 should be equipped with a database of standard test data meeting the relevant technical standards, and has independent data storage and automatic output functions of table printing, the system software of the computer is compiled with special test software, and the test software automatically controls the whole test process, collects, displays and stores data and prints reports.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims (10)

1. The metro vehicle air-tightness test bed comprises a machine cabinet and is characterized by further comprising a first filtering device, wherein the air inlet end of the first filtering device is connected with at least one air source connector, the air outlet end of the first filtering device is connected with a pressurization pipeline and at least one air inlet pipeline in parallel, and the air outlet end of the pressurization pipeline is connected with a sliding plug door pipeline; and the plug sliding door pipeline and the air inlet pipeline are both provided with air valve groups.

2. A metro vehicle air-tightness test bed according to claim 1, wherein there are two air inlet pipelines, and the air outlet ends of the two air inlet pipelines are respectively connected to two ends of a carriage of a metro vehicle.

3. A metro vehicle air-tight test bed according to claim 1, wherein the pressurization pipeline comprises a second filtering device, a pressurization valve and an air storage tank which are connected in series in sequence, an air inlet end of the second filtering device is connected with an air outlet end of the first filtering device, and an air outlet end of the air storage tank is connected with the plug valve pipeline.

4. A metro vehicle air-tightness test bed according to claim 3, wherein an air escape valve is arranged on the air storage tank; the air valve group comprises an inflation valve and an air release valve, and the air release valve is arranged on one side of an air outlet end of the inflation valve.

5. A metro vehicle air-tightness test bed according to claim 3, wherein an air outlet end of the air storage tank is connected with a one-way valve, and the other end of the one-way valve is connected with an air inlet end of the air inlet pipeline.

6. A metro vehicle air-tightness test bed according to claim 4, wherein the air escape valve, the inflation valve and the deflation valve are all set as electromagnetic valves; and the plug sliding door pipeline and the air inlet pipeline are respectively provided with a first pressure sensor and a second pressure sensor.

7. A metro vehicle air-tight test bed according to claim 6, further comprising a computer arranged in the cabinet, a first switching power supply, an I/O board and an A/D board arranged in the computer, wherein the first switching power supply is connected with an air release valve, each inflation valve and a deflation valve in parallel, and a contactor is connected on each inflation valve and deflation valve in series; the A/D board is connected with the first pressure sensor and the second pressure sensor, and the I/O board is connected with the control end of each contactor.

8. A metro vehicle air-tightness test bed according to claim 7, characterized in that the I/O board is provided with a second switching power supply for supplying power thereto, and the A/D board is provided with a third switching power supply for supplying power thereto.

9. A metro vehicle air-tightness test bed according to claim 8, further comprising a power supply circuit, wherein a circuit breaker is connected to the power supply circuit, an emergency stop switch and a button switch are sequentially connected to an anode output end of the circuit breaker in series, and two ends of a power supply of the computer, the first switch power supply, the second switch power supply and the third switch power supply are respectively connected to a cathode output end of the button switch and the circuit breaker.

10. A metro vehicle air-tightness test bed according to claim 1, wherein a plurality of travelling wheels are provided at the bottom of the cabinet.

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