Automatic cycle detection device capable of bidirectionally testing air tightness of product
By designing an automatic cyclic testing device capable of bidirectional testing, the problem of low efficiency in unidirectional testing of existing equipment has been solved, enabling high-frequency, automated, and safe airtightness testing, and improving testing accuracy and equipment flexibility.
Patent Information
- Application Number
- CN202520040527.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Existing testing equipment can only perform unidirectional testing, resulting in low testing efficiency, failing to meet the requirements of high-frequency reliability testing, and lacking automation and safety.
An automated cyclic testing device capable of bidirectional testing was designed. By combining forward and reverse testing of pipelines, solenoid valves, pressure sensors, and silencer pressure relief valves, automated and safe airtightness testing is achieved.
It improves the safety, accuracy, and efficiency of testing, reduces noise, enhances the flexibility and maintainability of the equipment, and supports high-frequency reliability testing.
Smart Images
Figure CN223827226U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection equipment technical field, more specifically, it relates to a kind of automatic circulation detection device with two-way test product air tightness. BACKGROUND
[0002] The test of general test bench is carried out from one direction to carry out pressure test, and the one-way valve needs to be tested in two directions. When ordinary testing is completed in one direction, the reverse direction is removed to test the other direction, which is time-consuming and laborious. Moreover, each reliability test national standard requires 100 times, and FM standard requires 500 times, and it takes more than half a month to test.
[0003] To meet the product performance test environment and quality assurance of GB25972 "gas fire extinguishing system and parts", it is required to inspect the product, provide more perfect function and service, and improve efficiency. The invention of the product two-way automatic circulation action control equipment can automatically carry out reliability test on the action one-way valve product, and also can record test pressure and action curve. According to the utility model, a kind of automatic circulation detection device with two-way test product air tightness is provided. UTILITY MODEL CONTENT
[0004] The utility model aims at overcoming the above-mentioned deficiencies in the prior art, and provides an automatic circulation detection device with two-way test product air tightness, which has the characteristics of high safety, high precision, high automation, low noise, good flexibility, easy maintenance and fault diagnosis.
[0005] To solve the above technical problems, the utility model aims at realizing as follows: the utility model relates to an automatic circulation detection device with two-way test product air tightness, which comprises a gas source and a measured product. The measured product is provided with a first air inlet test end and a second air inlet test end. A forward test pipeline is connected in series between the gas source and the first air inlet test end of the measured product. A first manual ball valve and a first electromagnetic valve are connected in series on the forward test pipeline. The first manual ball valve is arranged between the first electromagnetic valve and the gas source. A first branch pipe and a second branch pipe are connected to the forward test pipeline. One end of the first branch pipe and the second branch pipe connected to the forward test pipeline is arranged between the first electromagnetic valve and the measured product. A first pressure sensor and a first safety relief device are arranged on the first branch pipe. A second electromagnetic valve is connected in series on the second branch pipe.
[0006] The gas source is connected in series with a second gas inlet test end of the product to be tested, a reverse test pipeline is connected in series on the second gas inlet test end, a second manual ball valve and a third electromagnetic valve are connected in series on the reverse test pipeline, the second manual ball valve is arranged between the third electromagnetic valve and the gas source, a third branch pipe and a fourth branch pipe are connected to the reverse test pipeline, one end of the third branch pipe and the fourth branch pipe connected to the reverse test pipeline is arranged between the third electromagnetic valve and the product to be tested, a second pressure sensor and a second safety relief device are arranged on the third branch pipe, and the fourth branch pipe is connected in series with a fourth electromagnetic valve.
[0007] An acoustic relief valve is connected in series between one end of the second branch pipe not connected to the forward test pipeline and one end of the fourth branch pipe not connected to the reverse test pipeline.
[0008] The utility model further sets up: still include one end connection gas source, other end simultaneously connect forward test pipeline and reverse test pipeline's main shunt pipeline, main shunt pipeline is connected in series with main shunt manual ball valve.
[0009] The utility model further sets up: the product to be tested is detachably provided with an electric starting assembly.
[0010] In summary, the utility model has the following beneficial effects:
[0011] 1. High safety: through the real-time monitoring of the pressure sensor and the accurate control of the electromagnetic valve, it can be ensured that the pressure does not exceed the set value during the pressure test of the measured part, so as to prevent the equipment damage or safety accident caused by the excessive pressure. After the pressure test is completed, the relief valve is opened automatically or manually to release the pressure, so as to ensure that the internal pressure of the equipment is rapidly reduced to a safe level, and the safety of the operation is further improved.
[0012] 2. High precision: the pressure sensor is used to monitor the pressure change during the pressure test and the pressure maintaining process, so as to accurately judge whether the measured part meets the test requirements, and the test precision and reliability are improved. In the pressure maintaining stage, the pressure change is controlled within the allowable range, so as to ensure the stability and accuracy of the test results.
[0013] 3. High automation: the whole test process from pressure test, pressure maintaining to pressure release can be automatically controlled, so as to reduce the need for manual intervention, and improve the test efficiency and consistency.
[0014] 4. Low noise: in the pressure release process, the noise is reduced to the lowest by using the porous sound attenuation relief method, the working environment is improved, and the influence of the noise on the operator and the surrounding environment is reduced.
[0015] 5. Good flexibility: the control mode supports both forward and reverse pressure modes, and the appropriate pressure mode can be selected according to the specific needs and test requirements of the measured part. One-way pressure can also be used to test the sealing performance of other components or the action test of electric start. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION
[0017] In order to make those skilled in the art better understand the technical scheme of the utility model, the preferred embodiments of the utility model will be described below in combination with specific embodiments, but it should be understood that these descriptions are only for further illustrating the features and advantages of the utility model, and are not a limitation on the utility model patent claims. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0018] The utility model will be further illustrated below in combination with the drawings and preferred embodiments.
[0019] Embodiment 1
[0020] Referring to Figure 1 The automatic cyclic detection device for bidirectional testing of product air tightness of the embodiment comprises a gas source 1 and a measured product 2, the measured product 2 is provided with a first air inlet test end and a second air inlet test end,
[0021] The gas source 1 is connected in series with the first air inlet test end of the measured product 2, a forward test pipeline 3 is connected in series with the first air inlet test end of the measured product 2, a first manual ball valve 4 and a first electromagnetic valve 5 are connected in series on the forward test pipeline 3, the first manual ball valve 4 is arranged between the first electromagnetic valve 5 and the gas source 1, the forward test pipeline 3 is connected with a first branch pipe 6 and a second branch pipe 7, one end of the first branch pipe 6 and the second branch pipe 7 connected with the forward test pipeline 3 is arranged between the first electromagnetic valve and the measured product, the first branch pipe 6 is provided with a first pressure sensor 8 and a first safety relief device 9, and the second branch pipe 7 is connected in series with a second electromagnetic valve 10.
[0022] The gas source 1 is connected in series with the second gas inlet test end of the product 2, a reverse test pipeline 11 is connected in series on the reverse test pipeline 11, a second manual ball valve 12 and a third electromagnetic valve 13 are connected in series on the reverse test pipeline 11, the second manual ball valve 12 is arranged between the third electromagnetic valve 13 and the gas source 1, a third branch pipe 14 and a fourth branch pipe 15 are connected on the reverse test pipeline 11, one end of the third branch pipe 14 and the fourth branch pipe 15 connected with the reverse test pipeline 11 is arranged between the third electromagnetic valve and the product, the second pressure sensor 16 and the second safety relief device 17 are arranged on the third branch pipe 14, and the fourth electromagnetic valve 18 is connected in series on the fourth branch pipe 15.
[0023] The second branch pipe 7 is connected in series between one end of the second branch pipe 7 not connected with the forward test pipeline and one end of the fourth branch pipe 15 not connected with the reverse test pipeline.
[0024] Further, a main shunt pipeline 20 is arranged, one end of the main shunt pipeline 20 is connected with the gas source 1, and the other end of the main shunt pipeline 20 is connected with the forward test pipeline and the reverse test pipeline, and a main shunt manual ball valve 21 is connected in series on the main shunt pipeline 20.
[0025] Further, the product 2 is detachably provided with an electric starting assembly 22.
[0026] In the embodiment, the control principle of the detection device is as follows:
[0027] Forward action process:
[0028] Initial state: all valves are in the closed state, ensuring that the system is in a safe and pressure-free state.
[0029] Start pressurization: open the gas source to provide power for the system. Open the total valve (i.e. the main shunt manual ball valve 21), the first manual ball valve 4 and the first electromagnetic valve 5 in sequence, allow the gas to pass through and pressurize the measured member (i.e. the product 2). During the pressurization process, the pressure value is monitored by the first pressure sensor 8, and when the set test pressure is reached, the first electromagnetic valve 5 is closed to stop pressurization.
[0030] Pressure maintaining test:
[0031] The system enters the pressure maintaining stage, and the pressure is kept stable for a certain time according to the test requirements.
[0032] During this period, the first pressure sensor 8 continuously monitors the pressure change, and if the pressure change is within the allowable range, it is determined to be qualified.
[0033] Forward pressure relief:
[0034] After the test is completed, the fourth electromagnetic valve 18 is opened, and the pressure is relieved through the sound-attenuating relief valve 19 to ensure that the noise is minimized.
[0035] When the pressure drops to 0, all solenoid valves are closed, and the forward test process is ended.
[0036] Special case handling:
[0037] If the first pressure sensor 8 and / or the second pressure sensor 16 shows a non-zero pressure value during the test, a rapid pressure relief can be performed by simultaneously opening the second solenoid valve 10 and the fourth solenoid valve 18.
[0038] Reverse action process:
[0039] Waiting and preparation: After the forward test is completed, the system is paused for 5 seconds to ensure that all operations are stable.
[0040] Preparation for reverse pressure test: The second manual ball valve 12 and the third solenoid valve 13 are opened in sequence (the total valve is not closed).
[0041] Reverse pressure: The tested part is subjected to reverse pressure through the delivered pressure gas, and the second pressure sensor 16 is used to monitor the pressure value.
[0042] When the set reverse test pressure is reached, the system automatically closes the third solenoid valve 13.
[0043] Reverse pressure holding test: The system enters the reverse pressure holding stage, and the pressure value of the second pressure sensor 16 should be 0 (verify that the forward pressure relief is complete).
[0044] Similarly, according to the requirement to maintain pressure stability for a certain period of time, the second pressure sensor 16 monitors whether the pressure change is within the allowed range.
[0045] Reverse pressure relief: After the test is qualified, the fourth solenoid valve 18 is opened, and the reverse pressure relief is performed through the silencing pressure relief valve 5.
[0046] After the pressure relief is completed, the fourth solenoid valve 18 is closed, and the reverse test process is ended.
[0047] Cyclic test: According to the test requirements, the above-mentioned forward and reverse test processes are repeatedly performed until the specified number of tests is reached.
[0048] Safety: If the pressure is too high, the increased high pressure gas can be discharged through the safety relief device (including the first safety relief device 9 and the second safety relief device 17) to ensure that the equipment is not damaged.
[0049] Others: The test device can perform air tightness test on other components through one-way pressure, and can also increase the electric starting assembly 22 to perform starting test after one-way pressure on the tested components. The valves in the pipeline before relief are opened during starting.
[0050] The test mode realizes pressure test of the measured piece in two directions of forward and reverse and subsequent safety pressure relief process through fine valve control and pressure monitoring.
[0051] Wherein, when a fault occurs, the problem can be quickly located by checking the state of each valve and sensor and the reading of the pressure sensor, thereby shortening the troubleshooting and repair time.
[0052] In the technical solution, pneumatic actuators can be used instead of electromagnetic valves to increase the upper limit of system pressure; stainless steel pipes can be used instead of red copper pipes to increase the upper limit of system pressure; and the soundproof device can be replaced by sponge sound absorption or orifice plate pressure reduction.
[0053] The control principle has the advantages of high safety, high precision, high automation, low noise, good flexibility, easy maintenance and fault troubleshooting, etc. These advantages make the detection device widely used and recognized in the fields of industrial production and laboratory test.
[0054] Unless otherwise specified and limited, in the utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", the orientation or positional relationship is based on the actual shown orientation or positional relationship, only for the convenience of describing the utility model and simplifying the description, and therefore the utility model describes the orientation or positional relationship, which is only used for example, and cannot be understood as the limitation of the patent, for the ordinary skilled in the art, can be combined with the embodiment, and the specific meaning of the above-mentioned terms can be understood according to the specific situation.
[0055] Unless otherwise specified and limited, in the utility model, if there are terms such as "setting", "connecting" and "connecting", they should be understood broadly, for example, they can be fixedly connected, or they can be detachably connected, or integrally connected, they can be directly connected, or indirectly connected through an intermediate medium, and they can be connected inside two elements. For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific situation.
[0056] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor based on the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments based on the existing technology within the concept of the present application shall be within the protection scope defined by the claims.
Claims
1. An automatic cyclic testing device for bidirectional testing of product airtightness, comprising an air source and a product under test, wherein the product under test is provided with a first air inlet test end and a second air inlet test end, characterized in that: A forward test pipe is connected in series between the gas source and the first air inlet test end of the product under test. A first manual ball valve and a first solenoid valve are connected in series on the forward test pipe. The first manual ball valve is located between the first solenoid valve and the gas source. A first branch pipe and a second branch pipe are connected to the forward test pipe. The ends of the first branch pipe and the second branch pipe connected to the forward test pipe are located between the first solenoid valve and the product under test. A first pressure sensor and a first safety relief device are provided on the first branch pipe. A second solenoid valve is connected in series on the second branch pipe. A reverse test pipe is connected in series between the gas source and the second air inlet test end of the product under test. A second manual ball valve and a third solenoid valve are connected in series on the reverse test pipe. The second manual ball valve is located between the third solenoid valve and the gas source. A third branch pipe and a fourth branch pipe are connected to the reverse test pipe. One end of the third branch pipe and the fourth branch pipe connected to the reverse test pipe is located between the third solenoid valve and the product under test. A second pressure sensor and a second safety relief device are provided on the third branch pipe. A fourth solenoid valve is connected in series on the fourth branch pipe. A silencer and pressure relief valve is connected in series between the end of the second branch pipe that is not connected to the forward test pipe and the end of the fourth branch pipe that is not connected to the reverse test pipe.
2. The automatic cyclic testing device for bidirectional product airtightness testing according to claim 1, characterized in that: It also includes a main diversion pipe with one end connected to the gas source and the other end connected to both the forward test pipe and the reverse test pipe. A main diversion manual ball valve is connected in series on the main diversion pipe.
3. The automatic cyclic testing device for bidirectional product airtightness testing according to claim 1 or 2, characterized in that: The tested product is equipped with a detachable electric start component.