CN209166768U - A device for detecting leakage rate of aerostat bag samples - Google Patents

Abstract

The utility model provides a leakage rate detection device for aerostat bag samples. The leak rate detection device for the aerostat bag sample includes a test device, a pressurization device, a voltage stabilizer, a test platform, a lifting device and a high-precision scale. The test device includes a base and a pressing flange. The pressurizing device communicates with the cavity 1; the voltage stabilizing device is placed on the base and communicates with the cavity 2; the base is placed on the test platform, and the high-precision scale is set on the lifting device on the top surface of the motion end. Compared with the related art, the device for detecting the leakage rate of the aerostat capsule sample provided by the present invention utilizes high-pressure non-volatile liquid to form a blocking liquid to completely block the gas in the testing device from the capsule sample and the testing device. The leakage channel between the contact surfaces ensures that the gas can only leak through the capsule sample, which further ensures the detection accuracy.

Description

A device for detecting leakage rate of aerostat bag samples

technical field

The utility model relates to the technical field of aerostat detection, in particular to a leakage rate detection device for aerostat bag samples.

Background technique

The aerostat includes airships, tethered balloons, high-altitude balloons, etc. It is an aircraft that uses a buoyant gas lighter than air (usually helium or hydrogen) to generate net buoyancy. Stand empty. By carrying different mission loads on the aerostat, the aerostat can be used for wartime early warning, relay communication, border surveillance, electronic interference, anti-submarine and anti-missile, etc., and has a good prospect of dual-use military and civilian. However, the buoyancy gas (helium or hydrogen) will inevitably leak out from the aerostat bag, and the loss of buoyancy gas is too high, which will make the system stand height, load capacity and stand time unsatisfactory, resulting in The cost of using aerostats (including consumption of buoyancy gas, maintenance and management of personnel, etc.) has risen sharply.

The sources of buoyant gas leakage from the aerostat mainly include the following four aspects: one is the leakage of the buoyant gas due to defects such as small holes in the bag body being scratched by the structural parts; the other is that the aerostat is used for inflation , the deflation valve and other structural components installed on the bag body are not tightly sealed, so that the buoyant gas leaks; the third is that due to the insufficient tightness of the bag body material itself, the buoyant gas permeates from the surface of the bag body; The aerostat is made by tailor-welding a large number of capsule flaps, and the buoyant gas leaks from the weld.

The first source and the second source often lead to a large amount of leakage of the buoyant gas, but at the same time, they are also easy to detect, mainly relying on the brush coating method, mass spectrometer leak detection and other methods. The third source is determined by the properties of the capsule material itself. The fourth source is affected by the welding seam design scheme, the capsule welding process and the working environment. The third source and the third and fourth sources exist in large numbers. For the entire aerostat, this requires that the aerostat production unit can accurately find out the leakage rate of the aerostat, so as to select appropriate materials and optimize the design of the aerostat bag according to actual needs.

The existing detection means is shown in Figure 1, wherein 1'-gas chamber, 2'-capsule sample, 3'-sample installation platform, 4'-vacuum chamber. When testing, fix the bag sample 2' on the sample installation platform 3', and vacuum the vacuum chamber 4' and the gas chamber 1' respectively, and then fill the gas chamber 1' with a certain pressure of gas. The body sample 2' leaks into the vacuum chamber 4'.

This detection method has the following disadvantages:

(1) Since the leakage rate of the capsule sample is often very small (for example, the helium leakage rate of the 887 material is only 0.646 L/㎡.D.atm), the gas passes through the leakage between the capsule sample and the sample installation platform. Leakage, gas from the gas chamber to the outside will have a certain impact on the actual leakage rate;

(2) The above device is only suitable for the bag sample with flat surface. For the bag sample with welding seam on the edge, the sample installation platform cannot guarantee the reliable sealing between the bag sample and the sample installation platform and cannot be detected;

(3) After the detection is started, the pressure difference between the gas chamber and the vacuum chamber will gradually decrease and affect the detection accuracy;

(4) This type of gas permeameter is suitable for high pressure difference (generally 10kPa~100kPa) and small area detection conditions. Fully reflect the actual situation.

Utility model content

The purpose of the utility model is to provide a leakage rate detection device for aerostat bag samples, which solves the problem that the leakage rate of the aerostat bag is small, and it is difficult for a conventional detection device to reliably detect the leakage rate, so as to realize accurate detection of the leakage rate of the aerostat bag. High-precision detection of aerostat bladder leak rates.

The utility model provides a leakage rate detection device for an aerostat bag sample, which comprises a testing device, a pressurizing device, a voltage stabilizing device, a testing platform, a lifting device and a high-precision scale:

The test device includes:

a base, which has a cavity 1 and a cavity 2 disposed outside one end of the cavity 1;

A compression flange, the cover of which is arranged on the base;

The pressurizing device communicates with the cavity 1; the voltage stabilizing device is placed on the base and communicates with the cavity 2; the base is placed on the test platform, and the lifting device is located in the The test platform moves in a direction close to or away from the base, and the high-precision scale is arranged on the top surface of the moving end of the lifting device.

Preferably, the leak rate detection device for the aerostat capsule sample is placed in an incubator.

Preferably, the pressurizing device communicates with the cavity through a pressurizing pipeline and a hose in sequence at the upper end of the testing device; The end is provided with a pressure transmitter and valve five.

Preferably, it also includes two lifting brackets, which are respectively slidably connected to the two side walls of the incubator, the pressure boosting pipeline is provided with a valve 1 and a valve 2 in sequence, and the boosting device is placed on one side of the lifting bracket. On the bracket, the pressurizing pipeline extends through the lifting bracket to the inner cavity of the pressurizing device; the valve is disposed adjacent to the base, and is led out to the outside of the incubator through a pipeline.

Preferably, it also includes a liquid replenishing device disposed above the pressurizing device, the liquid replenishing device is placed on the lifting support on the other side, and the liquid replenishing device is connected to the pressurizing device through a liquid replenishing pipeline.

Preferably, the liquid replenishing pipeline is provided with a valve 3; the fluid replenishing device is led out to the outside of the incubator through a pipeline, and a valve 4 is provided on the pipeline outside the incubator.

Preferably, the pressurizing device, the liquid replenishing device and the pressure-stabilizing device are all filled with a less volatile liquid.

Preferably, an operation panel is also included, and the operation panel is electrically connected with the first valve, the second valve, the third valve, the fifth valve and the pressure transmitter.

Preferably, a pressure gauge is provided on the second communication position between the voltage stabilization device and the cavity.

Preferably, the base and the pressing flange are connected by a plurality of pressing studs, and the plurality of pressing studs are evenly arranged along the circumferential direction of the base and the pressing flange.

Compared with the related art, the utility model provides a leakage rate detection device for aerostat capsule samples by using a high-pressure non-volatile liquid to form a blocking liquid to completely block the gas in the testing device from passing from the capsule sample to the capsule sample. The leakage channel between the contact surfaces of the test device ensures that the gas can only leak through the capsule sample, which further ensures the detection accuracy.

Description of drawings

FIG. 1 is a schematic structural diagram of an existing aerostat bag sample leak rate detection device;

2 is a schematic structural diagram of a device for detecting the leakage rate of aerostat bag samples provided by the present invention;

Fig. 3 is a flow chart of the detection method of the device for detecting the leakage rate of the aerostat capsule sample provided by the present invention.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. For the convenience of description, the words "up", "down", "left" and "right" appear in the following text, which only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

As shown in FIG. 2 , the leakage rate detection device for aerostat capsule samples provided in this embodiment includes an incubator 1 , a testing device 2 , a pressurizing device 3 , and a voltage-stabilizing device arranged in the incubator 1 . 4. Operation panel 5, test platform 6, lifting device 7 and high-precision scale 8.

The incubator 1 is used to eliminate the influence of temperature changes on the leak rate detection.

The testing device 2 includes a base 9 , a pressing flange 10 and a clamping stud 11 . The base 9 has a cavity 12 and a cavity 2 13 disposed outside the right end of the cavity 12 . The pressing flange 10 is covered on the base 9, the base 9 and the pressing flange 10 are connected by a plurality of pressing studs 10, and the plurality of the pressing studs 10 are along the base 9 and the pressing The tightening flanges 10 are evenly arranged in the circumferential direction. After the capsule body 100 of the aerostat is installed on the base 9 , a closed cavity 1 is formed with the cavity 1 12 , and a closed cavity 2 is formed with the cavity 2 13 . Specifically, a plurality of sealing rings 26 are provided at the joint of the pressing flange 10 and the base 9 , and form the second closed cavity with the bag-like member 100 .

The pressurizing device 3 is connected to the cavity one 12 at the upper left end of the testing device 2 through a pressurizing pipeline 15 and a hose 16 in sequence. The joint of the hose 16 and the pressurizing pipeline 15 is fixed on the test platform 2 by the fixing seat 28 .

The number of the lifting brackets 17 is two, which are respectively slidably connected to the left and right side walls of the incubator. The first valve 18 and the second valve 19 are arranged on the pressurizing pipeline 15 in sequence, and the pressurizing device 3 is arranged on the upper end of the lifting bracket 17 on the left side. The lifting bracket 17 runs through the booster pipeline 15 and moves up and down along the side wall of the incubator 1 . The booster device 3 is placed on the lifting bracket 17 and moves up and down together with the lifting bracket 17 . . The valve one 18 is disposed adjacent to the base, and is led out to the outside of the thermostatic box 1 through a pipeline. The pressurizing device 3 is filled with a non-volatile liquid, and the pressurizing pipeline 15 extends from the bottom of the pressurizing device 3 to the inner cavity to be in contact with the non-volatile liquid. Open the valve 2 19, the non-volatile liquid flows into the test device 2, and at the same time, by adjusting the lifting bracket 17 to adjust the height difference between the booster device 3 and the test device 2, the pressure in the test device 2 is changed, so that the test device 2 can be tested. The pressure in device 2 rises to the specified value. The pressure in the pressurizing device 3 is the atmospheric pressure, and the pressure in the testing device 2 is raised or lowered by the action of the water column.

The cavity one 12 is provided with a pipeline extending from the inside to the outside, and a pressure transmitter 20 and a valve five 21 are arranged at the extending end. settings below.

The liquid replenishing device 14 is provided on the right side of the incubator 1 and above the booster device 3 , and the liquid replenishing device is placed on the right lifting bracket. Likewise, the liquid replenishing device 14 moves up and down together with the lifting bracket along the right side of the incubator 1 . The liquid supplement device 14 is connected to the booster device 3 through a liquid supplement pipeline 22 . The liquid replenishing pipeline 22 communicates with the bottom end of the liquid replenishing device 14 and the top end of the boosting device 3 . A valve 3 23 is provided on the fluid supplement pipeline 22 . The liquid replenishing device 14 is led out to the outside of the incubator through a pipeline (not numbered), and a valve 4 24 is provided on the pipeline outside the incubator 1 . The liquid replenishing device 14 is filled with a non-volatile liquid.

The operation panel 5 is electrically connected with the valve one 18 , the valve two 19 , the valve three 23 , the valve five 21 and the pressure transmitter 20 through a cable 27 on the outside of the thermostatic box 1 .

The pressurizing device 3 is communicated with the liquid replenishing device 14, and the valve three 23 is fed back by the pressure transmitter 20 to obtain a signal to open or close, so that the pressure in the test device 2 is stabilized at a specified size, and the pressure difference in the pressurizing device is ensured. Stablize.

The voltage-stabilizing device 4 is arranged below the cavity 2 13 and placed on the base 9 , and communicates with the boosting device 4 through a pipeline (not numbered) at the bottom of the cavity 2 13 , A pressure gauge 25 is provided on the pipeline. The pressure-stabilizing device 4 is filled with a non-volatile liquid, and the second closed cavity is communicated with the pressure-stabilizing device 4, and the non-volatile liquid in the second closed cavity is used to form a high-pressure blocking liquid to completely block the liquid in the first closed cavity. The leakage channel of gas from the contact surface between the capsule sample and the test device ensures that the gas can only leak through the capsule sample. That is, the cavity 2 and the liquid in it can seal the cavity together.

The base 9 is placed on the test platform 6 , the lifting device 7 moves in the direction close to or away from the base 9 in the test platform 6 , and the high-precision scale 8 is arranged on the top surface of the moving end of the lifting device 7 . superior. The lifting device 7 and the high-precision scale 8 are elevated, and abut the base 9 to push up the entire testing device 2, so as to achieve the purpose of weighing. At the same time, the hose 16 is used to move the pipeline along with the upward movement of the test device 2 . Intermittent weighing using the lifting device 7 eliminates the zero drift of the high-precision scale 8 compared to the testing device 2 being continuously placed on the high-precision scale 8 , which is more convenient than conventional intermittent weighing.

As shown in FIG. 2 and FIG. 3 , the detection method for the leakage rate detection device of the aerostat capsule sample provided by the present invention includes the following steps:

Step S1, lowering the high-precision scale so that there is a distance h ₁ between it and the lower surface of the base of the testing device, and confirming that valve 1, valve 2 and valve 3 are all closed; At a suitable height, there is enough non-volatile liquid in the pressurizing device and the liquid replenishing device;

Step S2, install the capsule sample to be tested on the base, press it on the test device by pressing the flange and the clamping stud, open the voltage stabilizer to fill the chamber 2 of the test device with non-volatile liquid, and pressurize the test device. placed at P ₂ ;

Step S3, stabilize the internal temperature of the incubator at the set value T ₁ ;

Step S4, open the second valve, and the non-volatile liquid in the pressurizing device flows into the testing device;

Step S5, set the valve 3 to the automatic on-off mode, and set the opening and closing pressures to be P ₁ -0.5b and P ₁ +0.5b respectively, so that the pressure in the cavity 1 is stabilized at P ₁ , P ₂ > P ₁ ;

Step S6, close the valve 2, start the lifting device with the rising distance h ₂ , h ₂ -h ₁ =a, a is the maximum normal compression length of the high-precision scale, obtain the weight m ₁ of the test device and its upper voltage stabilizer and record it , and then start the lifting device to descend to the original position;

Step S7, open valve 2, and repeat step 6 after the specified time t ₀ to obtain the weight m ₂ of the test device and its upper pressure-stabilizing device. ₀ can be converted to obtain the leakage rate of the capsule sample under the condition that the temperature is T ₁ and the pressure is P ₁ ;

Step S8, adjusting the temperature in the incubator to detect the leakage rates of the same capsule sample at different temperatures under the same pressure;

Step S9, or adjusting the set value of the pressure transmitter, can detect the leakage rate of the same capsule sample at different temperatures under the same temperature;

Step S10, or replacing the capsule body sample, repeating steps S1 to S7, the leakage rates of different capsule body samples can be detected.

The detection method obtains the mass increment of the non-volatile liquid by weighing to obtain the gas leakage rate, which improves the detection accuracy from the detection method. At the same time, the pressure difference formed by the non-volatile liquid is used to simulate the actual working condition, eliminating the need for high-pressure gas. A stable pressure difference environment is created, and the gas leakage rate is converted by the mass increment of the non-volatile liquid obtained by weighing, which ensures the detection accuracy from the detection method.

The above are only the embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and accompanying drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. one kind be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that including test device, supercharging device, Stable-pressure device, test platform, lifting device and high-precision scale；

The test device includes:

Pedestal has a cavity one and the cavity two on the outside of one end of the cavity one；

Supported flange is covered on the pedestal；

The supercharging device is connected to the cavity one；The stable-pressure device is placed on the pedestal and connects with the cavity two It is logical；The pedestal is placed on the test platform, and the lifting device is in the test platform to facing close or remote from pedestal Direction movement, the high-precision scale be set to lifting device tache motorice top surface on.

2. according to claim 1 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that the floating Device utricule exemplar leakage rate detection apparatus is placed in an insulating box.

3. according to claim 2 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that the pressurization Device passes sequentially through a pressure piping and hose in the upper end of test device and is connected to the cavity one；The cavity one is equipped with one The pipeline extended from inside to outside from it, and pressure transmitter and valve five are equipped in elongated end.

4. according to claim 3 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that further include two Lifting support, the two sidewalls with the insulating box are slidably connected respectively, and valve one and valve two are successively arranged on the pressure piping, The supercharging device is placed on lifting support described in side, and the pressure piping extends to supercharging device through the lifting support Inner cavity；The valve one closes on pedestal setting, and is led on the outside of insulating box by a pipeline.

5. according to claim 4 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that further include setting Liquid supply device above the supercharging device, the liquid supply device are placed on lifting support described in the other side, the fluid infusion Device is connect by replenishing line with the supercharging device.

6. according to claim 5 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that the fluid infusion Pipeline is equipped with valve three；The liquid supply device is led on the outside of insulating box by a pipeline, and the pipeline on the outside of insulating box It is equipped with valve four.

7. according to claim 5 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that the pressurization Difficult volatile liquid is respectively arranged in device, liquid supply device and stable-pressure device.

8. according to claim 6 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that further include behaviour Make panel, the operation panel is electrically connected with the valve one, valve two, valve three, valve five and pressure transmitter.

9. according to claim 1 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that the pressure stabilizing Device and two communicating position of cavity are equipped with a pressure gauge.

10. according to claim 1 be used for aerostatics utricule exemplar leakage rate detection apparatus, which is characterized in that the bottom By multiple compression Stud connections, multiple compression studs are equal along the circumferencial direction of pedestal and supported flange for seat and supported flange Cloth setting.