CN217560890U - Portable high-low pressure synchronous air tightness detection device - Google Patents
Portable high-low pressure synchronous air tightness detection device Download PDFInfo
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- CN217560890U CN217560890U CN202221281181.6U CN202221281181U CN217560890U CN 217560890 U CN217560890 U CN 217560890U CN 202221281181 U CN202221281181 U CN 202221281181U CN 217560890 U CN217560890 U CN 217560890U
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Abstract
The utility model discloses a portable high-low pressure synchronous air tightness detection device, which comprises a high-pressure inflation loop and a low-pressure test loop which are arranged in a box-type structure and are mutually independent; the high-pressure inflation loop is sequentially provided with an inflation joint, a high-pressure pipeline I, a filter, a safety valve, a high-pressure gauge, a high-pressure test interface, a high-pressure pipeline II and an air outlet joint; the low-pressure test loop is sequentially provided with a test joint, a low-pressure pipeline I, an exhaust stop valve, a low-pressure pipeline II, a low-pressure gauge, a low-pressure test interface and an exhaust joint. The method and the device can realize synchronous high-low pressure air tightness detection of the product to be detected; and can be through the portable removal of the handrail of box structure both sides, the callus on the sole of bottom is steadily placed to convenient access instrument spare part through the panel that opens and shuts of box structure, have small, light in weight, can portable removal, advantages such as easy operation, be particularly suitable for the gas tightness of products such as guided missile, rocket, carrier in the aerospace engineering and detect the use.
Description
Technical Field
The utility model relates to an aerospace engineering gas tightness detection area, concretely relates to synchronous airtight detection device of portable high-low pressure.
Background
The field of aerospace engineering uses an air pressure or hydraulic power system to generate or transmit power, a large number of pressure-bearing elements such as air cylinders, storage tanks, pipelines, valves and the like are used in the system, and the air tightness of the pressure-bearing elements needs to be regularly detected to evaluate the working performance of the power system. The air tightness test is usually performed by adopting a gas distribution operation table, and the following two inconveniences exist in the method: firstly, the size of the gas distribution operation table is larger, the pipelines are mostly fixed hard pipes, the movement and the operation are inconvenient, and particularly, after the pressure-bearing element is loaded with balls or arrows, the gas-filled or pressure-measuring interface part is difficult to adapt to the gas distribution operation table; and secondly, the aerospace engineering power system generally needs to synchronously test the pressure of a high-pressure area and a low-pressure area of a product to evaluate the working performance of the pressure reducer, and a conventional gas distribution operation platform does not have the high-pressure and low-pressure synchronous airtight detection and interpretation capability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to above-mentioned complicated space engineering field particularity, provide a portable, can make up formula fast, have the airtight detecting system of general high-low pressure of high-low pressure control output function, adopt movable airtight detection device, adopt mechanical type manometer, adopt nitrogen cylinder pressure air feed, solve large-scale complicated sealing pressure system's sealed detection problem.
In order to achieve the above object, the utility model adopts the following technical scheme:
a portable high-low pressure synchronous air tightness detection device comprises a high-pressure inflation circuit and a low-pressure test circuit; the high-pressure inflation loop is sequentially provided with an inflation joint, a high-pressure pipeline I, a filter, a safety valve, a high-pressure gauge, a high-pressure test interface, a high-pressure pipeline II and an air outlet joint; the low-pressure test loop is sequentially provided with a test joint, a low-pressure pipeline I, an exhaust stop valve, a low-pressure pipeline II, a low-pressure gauge, a low-pressure test interface and an exhaust joint; the high-pressure inflation circuit and the low-pressure test circuit are mutually independent on the gas circuit channel, and high-pressure and low-pressure synchronous airtight detection of a product to be detected can be realized.
Preferably, in the high-pressure inflation circuit, an air inlet of a high-pressure pipeline I is connected with an inflation connector, and an air outlet of the high-pressure pipeline I is connected with an inlet of a filter; the high-pressure pipeline II is provided with 1 air inlet and filter outlet connection, 1 air outlet and air outlet joint connection, and is also provided with 2 test ports which are respectively connected with a high-pressure gauge and a high-pressure test interface, and 1 pressure relief port is connected with a safety valve.
Preferably, in the low-pressure test loop, an air inlet of a low-pressure pipeline I is connected with the test joint, and an air outlet of the low-pressure pipeline I is connected with an inlet of the stop valve; the low-pressure pipeline II is provided with 1 air inlet and stop valve exit linkage, and 2 test ports are connected with low-pressure manometer and low-pressure test interface respectively, and 1 gas outlet is connected with the exhaust joint.
Preferably, the filter precision of the filter is selected according to the requirement of the product on the cleanliness of the charged gas, and the filter precision is generally selected to be 10-15 μm; the safety valve is used for limiting the highest pressure of inflation gas and ensuring the safety of a gas circuit, and the take-off pressure of the safety valve is generally selected according to 1.2 times of the rated working pressure of a measured product.
Preferably, the dial diameters of the high-pressure gauge and the low-pressure gauge are not less than 150mm, the precision grades of the pressure gauges are not less than 0.2 grade, and accurate measurement and interpretation of pressure changes can be achieved.
Preferably, the high-pressure inflation circuit and the low-pressure test circuit are mounted in a box-type structure, the box-type structure is formed by combining a front panel, an upper panel, a rear panel, a bottom panel and side panels in a screw connection mode, a rotating pin shaft is mounted between the front panel and the bottom panel and used for realizing 90-degree opening and closing rotation, and a locking structure is mounted between the front panel and the upper panel and used for reliably locking the position in a closed state.
As the optimization of the scheme, handrails are arranged on two sides of the box-type structure and used for the portable movement of the device, and foot pads are arranged at the bottom of the box-type structure and used for the stable placement and transportation buffering of the device.
Due to the structure, the beneficial effects of the utility model reside in that:
before detection, the high-pressure inflation circuit and the low-pressure testing circuit are independent, and the low-pressure outlet end is provided with an independent exhaust valve; during detection, the high-pressure test loop is simultaneously communicated with an air source and a high-pressure air inlet of a product to be detected, when nitrogen is filled into the high-pressure sealing system from the test system through a high-pressure nitrogen cylinder, a high-pressure region and a low-pressure region are formed in the high-pressure sealing system, the high-pressure region and the low-pressure region are isolated by a pressure reducing valve, an independent high-pressure channel and a low-pressure channel of the detection system form a passage after being connected with the detected sealing system, the pressure value of the high-pressure region is read by a high-pressure meter, the pressure of the low-pressure region is led back by the low-pressure test loop, and the pressure value of the low-pressure region is read by the low-pressure meter; and when the specified pressure balance is achieved, closing the air inlet channel, waiting for 10 minutes, and determining that the change of the indication value of the meter is not more than 0.1MPa, so that the high-low pressure synchronous airtight detection is realized.
Moreover, the portable movable handrails can be moved in a portable mode, the foot pads are placed stably, the tool spare parts can be stored and taken conveniently through the opening and closing panel, the portable movable handrails have the advantages of being small in size, light in weight, capable of moving in a portable mode, simple to operate and the like, and the portable movable handrails are particularly suitable for being used for detecting the air tightness of products such as missiles, rockets and carriers in aerospace engineering.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.
FIG. 1 is a gas circuit structure diagram of the present invention;
FIG. 2 is an isometric view of the present invention with the front panel closed;
FIG. 3 is a side view of the front panel of the present invention in an open position;
FIG. 4 is an internal structure view of the present invention;
FIG. 5 is a schematic diagram of the gas circuit of the present invention;
in the figure: 1-an inflation connector, 2-a high-pressure pipeline I, 3-a filter and 4-a high-pressure gauge; 5-high pressure test interface, 6-safety valve, 7-high pressure pipeline II, 8-air outlet joint, 9-test joint, 10-low pressure pipeline I, 11-low pressure gauge, 12-low pressure test interface, 13-exhaust stop valve, 14-low pressure pipeline II, 15-exhaust joint and 16-box structure.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present 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.
As shown in fig. 1 to 5, the present embodiment provides a portable high-low pressure synchronous airtightness detection apparatus, which includes two independent high-pressure inflation circuits and two independent low-pressure testing circuits; the high-pressure inflation loop is sequentially provided with an inflation joint 1, a high-pressure pipeline I2, a filter 3, a safety valve 6, a high-pressure gauge 4, a high-pressure test interface 5, a high-pressure pipeline II 7 and an air outlet joint 8; the low-pressure test loop is sequentially provided with a test joint 9, a low-pressure pipeline I10, an exhaust stop valve 13, a low-pressure pipeline II 14, a low-pressure gauge 11, a low-pressure test interface 12 and an exhaust joint 15; the high-pressure inflation circuit and the low-pressure test circuit are mutually independent on the gas circuit channel, and high-pressure and low-pressure synchronous airtight detection of a product to be detected can be realized.
In the embodiment, in the high-pressure inflation loop, an air inlet of a high-pressure pipeline I2 is connected with an inflation connector 1, and an air outlet is connected with an inlet of a filter 3; the high-pressure pipeline II 7 is provided with 1 air inlet connected with the outlet of the filter 3, 1 air outlet connected with the air outlet joint 8, 2 test ports respectively connected with the high-pressure gauge 4 and the high-pressure test interface 5, and 1 pressure relief port connected with the safety valve 6.
In the embodiment, in the low-pressure test loop, an air inlet of a low-pressure pipeline I10 is connected with a test joint 9, and an air outlet is connected with an inlet of a stop valve; the low-pressure pipeline II 14 is provided with 1 air inlet connected with the outlet of the stop valve, 2 test ports respectively connected with a low-pressure gauge 11 and a low-pressure test interface 12, and 1 air outlet connected with an exhaust joint 15.
In the embodiment, the filtering precision of the filter 3 is selected according to the requirement of the product on the cleanliness of the charged gas, and the filtering precision is generally selected to be 10-15 μm; the safety valve 6 is used for limiting the highest pressure of the inflation gas and ensuring the safety of a gas circuit, and the take-off pressure of the safety valve 6 is generally selected according to 1.2 times of the rated working pressure of a measured product.
In this embodiment, the dial diameters of the high-pressure gauge 4 and the low-pressure gauge 11 are not less than 150mm, the precision grades of the pressure gauges are not less than 0.2 grade, and accurate measurement and interpretation of pressure changes can be realized.
In this embodiment, high pressure inflation circuit and low pressure test circuit are installed in box structure 16, box structure 16 is formed by front panel, top panel, back plate, bottom plate, curb plate through the mode combination of screwed connection, install the rotation pin axle between front panel and the bottom plate for realize 90 opening and shutting rotation, install the hasp structure between front panel and the top panel, be used for can reliably locking position under the closed condition.
In this embodiment, the box structure 16 is equipped with handrails on both sides for portable movement of the device and foot pads on the bottom for smooth placement and transportation cushioning of the device.
The working step principle of the structure is as follows:
(1) Preparing before sealing detection: before use, the loose nuts on the exhaust joint 15, the inflation joint 1 and the low-pressure test interface 12 are loosened, and the loose nuts and the plugs are taken down. The exhaust shut valve 13 is screwed closed clockwise in the direction of opening and closing on the panel. The high-pressure area air outlet connector 8, the low-pressure area air outlet connector 15, the high-pressure area sensor testing interface 5 and the low-pressure area sensor testing port 12 are plugged by plugs.
(2) High-pressure circuit gas tightness self-checking before sealing detection: and (3) slowly filling 8MPa nitrogen into the sealing inspection device from the high-pressure gas filling joint 1 by using a nitrogen bottle high-pressure tank, and observing whether the value displayed by the pressure gauge is correct. And after the pressure is stable, closing the inflation switch to stop inflating, maintaining the pressure for 10min, and ensuring that the pressure drop is not allowed to exceed 0.1MPa. And after the test is qualified, loosening the pipeline joints 1-2 at the high-pressure air inlet inflation joint 1 to slowly discharge the gas.
(3) Low-pressure loop airtightness self-inspection before sealing detection: and (5 MPa of nitrogen is slowly filled into the sealing inspection device from the low-pressure test interface 9, and whether the value displayed by the pressure gauge is correct or not is observed. And after the pressure is stable, closing the inflation switch to stop inflating, maintaining the pressure for 10min, and ensuring that the pressure drop is not allowed to exceed 0.1MPa. And after the test is qualified, opening the exhaust stop valve switch 13 to discharge the gas.
(4) Connecting test pipelines of the products to be tested: the high-pressure air inlet inflation connector 1 and the high-pressure area air outlet connector 8 are in an open state, the low-pressure area exhaust stop valve 13 is in a closed state, the low-pressure test interface 9 is in a closed state, and the test connector 9 is in a blocking state. The principle is shown in fig. 5. And an outlet of the nitrogen cylinder is provided with an inflating tool which is connected to the air inlet and inflation connector 1 of the high-pressure loop of the sealing inspection device through a metal hose. The schematic connection is shown in fig. 5. And opening the sealing inspection device, and taking out the two metal hoses, wherein one metal hose is used for connecting the high-pressure loop interface 8 of the sealing inspection device to the high-pressure test interface C1 of the product to be tested. And the other one is used for connecting the low-pressure loop interface 9 of the sealing inspection device with the low-pressure test interface C2 of the product. The connection schematic diagram is as shown in fig. 5, the pressure transmitter interfaces 5 and 12 are plugged by plugs and gaskets, and the plugging of the interfaces 5 and 12 is completed when the sealing inspection device leaves the factory.
(5) And (3) testing the air tightness of the product to be tested: and opening a stop valve of the nitrogen cylinder, and adjusting a knob of a pressure reducing valve of the inflating tool to enable the nitrogen to be inflated into the product, wherein the pressure increasing rate does not exceed (0.6-0.8) MPa/min in the inflating process. And (4) observing the pressure gauge reading of a high-pressure gauge 4 of the sealing inspection device, stopping inflating when the pressure reaches (8 +/-0.2) MPa, and closing the stop valve of the nitrogen bottle mouth. And stabilizing the pressure for 10min, observing the reading of a high-pressure gauge 4 of a high-pressure area of the sealing inspection device in the pressure stabilizing process, opening a stop valve of a nitrogen bottle mouth when the pressure is less than 7.8MPa, filling nitrogen into the product, and ensuring that the reading of the high-pressure gauge 4 of the sealing inspection device is within the range of (8 +/-0.2) MPa and the reading of a low-pressure gauge 11 is within the range of (3.4 +/-0.2) MPa after the pressure stabilizing is finished. And starting pressure maintaining timing after pressure stabilization, recording the pressure at the moment as a reference value, maintaining the pressure for 10min, and observing the pressure change of a high-pressure loop and a low-pressure loop of the sealing inspection device in the pressure maintaining process through a pressure gauge. The pressure drop of the high-pressure loop is not more than 0.2MPa, and the pressure change of the low-pressure loop is not more than +/-0.2 MPa, which are taken as qualification judgment conditions, and the leakage detection of the joint part of the pipeline is allowed by using the soap liquid smearing in the pressure maintaining process. And after the test is finished, the exhaust stop valve 13 is opened to exhaust the gas in the attitude control system.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a synchronous airtight detection device of portable high-low pressure which characterized in that: the device comprises a high-pressure inflation circuit and a low-pressure test circuit; the high-pressure inflation loop is sequentially provided with an inflation joint, a high-pressure pipeline I, a filter, a safety valve, a high-pressure gauge, a high-pressure test interface, a high-pressure pipeline II and an air outlet joint; the low-pressure test loop is sequentially provided with a test joint, a low-pressure pipeline I, an exhaust stop valve, a low-pressure pipeline II, a low-pressure gauge, a low-pressure test interface and an exhaust joint; the high-pressure inflation circuit and the low-pressure testing circuit are independent on the gas circuit channel, and high-pressure and low-pressure synchronous airtight detection of a product to be detected can be achieved.
2. The portable high-low pressure synchronous air tightness detection device according to claim 1, characterized in that: in the high-pressure inflation loop, an air inlet of a high-pressure pipeline I is connected with an inflation connector, and an air outlet is connected with an inlet of a filter; the high-pressure pipeline II is provided with 1 air inlet and filter outlet connection, 1 air outlet and air outlet joint connection, and is also provided with 2 test ports which are respectively connected with a high-pressure gauge and a high-pressure test interface, and 1 pressure relief port is connected with a safety valve.
3. The portable high-low pressure synchronous air-tightness detection device according to claim 1, characterized in that: in the low-pressure test loop, a gas inlet of a low-pressure pipeline I is connected with a test joint, and a gas outlet is connected with an inlet of a stop valve; the low-pressure pipeline II is provided with 1 air inlet and a stop valve outlet, 2 test ports are respectively connected with a low-pressure gauge and a low-pressure test interface, and 1 air outlet is connected with an exhaust joint.
4. The portable high-low pressure synchronous air tightness detection device according to claim 1, characterized in that: the filtering precision of the filter is 10-15 μm; the take-off pressure of the safety valve is 1.2 times of the rated working pressure of the product to be measured.
5. The portable high-low pressure synchronous air-tightness detection device according to claim 1, characterized in that: the dial diameter of the high-pressure gauge and the low-pressure gauge is not less than 150mm, and the precision grade of the pressure gauges is not less than 0.2 grade.
6. The portable high-low pressure synchronous air tightness detection device according to claim 1, characterized in that: the high-pressure inflation circuit and the low-pressure testing circuit are arranged in a box-type structure, the box-type structure is formed by combining a front panel, an upper panel, a rear panel, a bottom plate and side plates in a screw connection mode, a rotating pin shaft is arranged between the front panel and the bottom plate and used for realizing 90-degree opening and closing rotation, and a lock catch structure is arranged between the front panel and the upper panel and used for reliably locking the position in a closed state.
7. The portable high-low pressure synchronous air-tightness detection device according to claim 6, characterized in that: handrails are arranged on two sides of the box-type structure, and a foot pad is arranged at the bottom of the box-type structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281181.6U CN217560890U (en) | 2022-05-25 | 2022-05-25 | Portable high-low pressure synchronous air tightness detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221281181.6U CN217560890U (en) | 2022-05-25 | 2022-05-25 | Portable high-low pressure synchronous air tightness detection device |
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| CN217560890U true CN217560890U (en) | 2022-10-11 |
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| CN202221281181.6U Active CN217560890U (en) | 2022-05-25 | 2022-05-25 | Portable high-low pressure synchronous air tightness detection device |
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| CN (1) | CN217560890U (en) |
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- 2022-05-25 CN CN202221281181.6U patent/CN217560890U/en active Active
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