Water-free detection device
By using speed-increasing tubes and digital signal sensors to amplify the air pressure difference in the sanitary ware product testing device, the problems of low testing efficiency and insufficient accuracy of sanitary ware products are solved, achieving high-precision detection of water splashes and leaks, and improving the level of automation in testing.
Patent Information
- Application Number
- CN202423135731.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Existing bathroom products suffer from low testing efficiency, low automation, and insufficient testing accuracy and resolution, making it difficult to accurately determine water splash defects and leakage problems.
By combining a speed-increasing tube and a digital signal sensor, the gas pressure difference is amplified through the gas release speed-increasing technology. Combined with a differential pressure sensor and a gas pressure sensor, the gas source pressure is monitored in real time to achieve high-precision detection of water splashes and leaks.
It improves the accuracy and efficiency of bathroom product testing, can accurately identify water splash defects and leaks, reduces the risk of residual water drying, and enhances the level of automation in testing.
Smart Images
Figure CN223461189U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection equipment technical field, specifically, relate to a water -free detection device. BACKGROUND
[0002] The water outlet effect detection technology of the existing bathroom product (shower, faucet) mainly depends on artificial observation after water test or determines whether the water spray exists defect and whether there is leakage when water outlet through detecting water pressure. However, these methods have some significant deficiencies: first, the efficiency of product water test is low, and the automation level of detection process is not high; second, the product after water test needs to carry out subsequent drying process, which not only is time -consuming, but also is easy to leave residual water, leading to the possibility of residual water steam in the product packaging and transportation process.
[0003] The bathroom product (shower, faucet) passes through water -free testing device, not only can improve the detection efficiency and level of bathroom product, and solve the residual water drying problem when bathroom product leaves factory. The existing water -free detection generally is through pressure maintaining in product interior, then calculates the change of pressure after a period of time to judge whether leakage and other problems occur, however, in the existing scheme, the stability is low during pressure maintaining, and the measurement precision is low, it is difficult to judge the water spray defect caused by product structure defect, and the change amount of the parameter (differential pressure) of the detected pressure is insufficient when the pressure produces slight change, leading to low detection precision and resolution. UTILITARY MODEL CONTENT
[0004] The utility model discloses a water -free detection device, aims at improving the problem mentioned above.
[0005] The utility model has adopted the following schemes:
[0006] A water -free detection device, it includes: the air inlet pipeline of connecting gas source, with first test pipeline that the air inlet pipeline is linked together, wherein, first test pipeline is suitable for connecting the product to be tested, and is provided with the velocity -increasing pipe that is suitable for amplifying the differential pressure value of the test product downstream end caused by the slight change of exhaust flow on first test pipeline, first gas pressure sensor is arranged on the upstream end of velocity -increasing pipe, and second gas pressure sensor is arranged on the downstream end to be used for detecting the air pressure value of two ends before and after velocity -increasing pipe respectively.
[0007] Further, the fluid passage of the velocity -increasing pipe has a cross section smaller than the first test pipeline, and the fluid passage cross section of the velocity -increasing pipe is 1 / 2-1 / 5 of the fluid passage cross section of the first test pipeline.
[0008] Further, the upstream end of the velocity -increasing pipe is provided with a first air inlet valve, and the downstream end is provided with a gas release valve, and the downstream end of the gas release valve is suitable for connecting the product to be tested.
[0009] Further, a second test pipeline connected to the air inlet pipeline is further included, a second air inlet valve is arranged on the second test pipeline, and a differential pressure sensor is arranged at the downstream end of the second air inlet valve, and the other end of the differential pressure sensor is provided with a gas shunt connected to the downstream end of the speed-up tube to detect the pressure difference between the two ends of the speed-up tube.
[0010] Further, a normally open valve is arranged on the gas shunt to control the on-off of the gas shunt.
[0011] Further, a pressure regulating valve and an on-off master valve are arranged on the air inlet pipeline to adjust and control the gas pressure of the first test pipeline and the second test pipeline.
[0012] Further, the first air pressure sensor and the second air pressure sensor are digital signal sensors of RS485 type.
[0013] Further, a third air pressure sensor is arranged on the air inlet pipeline to detect the air inlet pressure of the gas source end.
[0014] Beneficial effects:
[0015] In the scheme, the speed-up tube is arranged on the first test pipeline to detect the air pressure difference between the two ends of the speed-up tube, the air release is continuously monitored in an active air release manner, the speed-up tube is arranged to increase the pressure difference between the two ends of the speed-up tube, so that when the downstream end of the speed-up tube has a problem of the detected water splash of the bathroom product, the air pressure value of the downstream end of the speed-up tube will be changed, the air release speed-up technology is adopted to achieve the sound speed air release, the local pressure drop in the air release process is improved, the water splash loss difference between the test product with the water splash defect and the preset standard value is amplified, and the precision of the water splash detection is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structure schematic view of a water-free detection device according to an embodiment of the utility model;
[0017] Figure: air inlet pipeline 1, pressure regulating valve 2, on-off master valve 3, first test pipeline 4, second test pipeline 5, first air inlet valve 6, second air inlet valve 7, first air pressure sensor 8, second air pressure sensor 9, third air pressure sensor 10, normally open valve 11, air release valve 12, test product 13, differential pressure sensor 14, speed-up tube 15. DETAILED DESCRIPTION
[0018] Embodiment 1
[0019] Combined with Figure 1The embodiment provides a water detection device, which comprises: an air inlet pipeline 1 connected with an air source, and a first test pipeline 4 communicated with the air inlet pipeline 1; wherein a speed-up tube 15 is arranged on the first test pipeline 4, and the speed-up tube 15 is suitable for amplifying the differential pressure value at both ends thereof; a first air pressure sensor 8 is arranged at the upstream end of the speed-up tube 15, and a second air pressure sensor 9 is arranged at the downstream end of the speed-up tube 15, so as to detect the air pressure values at both ends of the speed-up tube 15; and the speed-up tube 15 is suitable for amplifying the differential pressure value at the downstream end thereof caused by the slight change of the exhaust flow of a test product, so as to accurately measure the air pressure differential value at both ends of the speed-up tube.
[0020] A first air inlet valve 6 is arranged at the upstream end of the speed-up tube 15, and an air exhaust valve 12 is arranged at the downstream end of the speed-up tube 15, and the downstream end of the air exhaust valve 12 is suitable for being connected with a product to be tested 13.
[0021] A second test pipeline 5 communicated with the air inlet pipeline 1 is further arranged, a second air inlet valve 7 is arranged on the second test pipeline 5, a differential pressure sensor 14 is arranged at the downstream end of the second air inlet valve 7, and the other end of the differential pressure sensor 14 is connected with a gas branch connected with the downstream end of the speed-up tube 15, so as to detect the differential pressure value at both ends of the speed-up tube 15; a normally open valve 11 is arranged on the gas branch, so as to control the opening and closing of the gas branch; a pressure regulating valve 2 and an on-off valve 3 are arranged on the air inlet pipeline 1, so as to adjust and control the air pressure of the first test pipeline 4 and the second test pipeline 5; and a third air pressure sensor 10 is arranged on the air inlet pipeline 1, so as to detect the air inlet pressure at the air source end.
[0022] In the embodiment, the product to be tested 13 can be a bathroom product, such as a shower head, a faucet or the like, and can also be used for air tightness test, water spray test and the like of other water passing products. The air source end of the air inlet pipeline 1 can be connected with a gas storage tank, so as to ensure that there is sufficient stable exhaust flow in the stable pressure and test air exhaust stages, the third air pressure sensor 10 is arranged at the air source end, so as to monitor the pressure thereof; if the air source pressure decreases below the set air charging and discharging pressure in the stable air exhaust and water spray test stages, the pressure regulating valve 2 cannot provide the set air charging and discharging pressure of the system, the test process is stopped, and an alarm is given, so as to ensure the accuracy of the test.
[0023] The fluid passage in the speed-increasing tube 15 has a cross-sectional area smaller than that of the first test pipeline 4, and the cross-sectional area of the fluid passage in the speed-increasing tube 15 is 1 / 2-1 / 5 of that of the fluid passage in the first test pipeline 4. In this embodiment, the cross-sectional area of the fluid passage in the speed-increasing tube 15 is smaller than that of the fluid passage in the first test pipeline 4. Since the reduction of the fluid passage area will cause the flow rate of the gas to increase when the gas passes through the speed-increasing tube 15, the cross-sectional area of the fluid passage in the speed-increasing tube 15 is set to be 1 / 2-1 / 5 of that of the fluid passage in the first test pipeline 4, so that the flow rate of the gas can reach the speed of sound at a preset gas pressure, and the gas flow rate at the two ends of the speed-increasing tube 15 remains unchanged. Therefore, when the gas pressure in the system is stable, the differential pressure value caused by the slight change of the exhaust flow rate of the test product 13 will be amplified to the maximum value, which is beneficial to improving the test precision. Then, the actual measured differential pressure value is compared with the preset standard differential pressure value range, so as to determine whether the test product 13 has a problem. The preset standard differential pressure value can be obtained by testing the good product, or can be artificially set according to the product standard. For example, the fluctuation range of the differential pressure value of the good product in the water spray test is-10 Pa-10 Pa; the water spray differential pressure of the weak defect bad product is greater than 1000 Pa, and the water spray leakage differential pressure value of the water spray leakage bad product is less than-1000 Pa. The difference between the preset standard differential pressure value and the differential pressure value detected by the gas pressure sensor is defined as the water spray loss pressure drop. When the water spray loss pressure drop of the test is positive and greater than the set water spray pressure drop standard, it is judged that the product has a weak defect in the water outlet effect; when the water spray loss pressure drop of the test is negative and less than the water spray leakage standard, it is judged that the product has a leakage defect in the water outlet effect.
[0024] In an embodiment, the first gas pressure sensor 8, the second gas pressure sensor 9 and the third gas pressure sensor 10 all adopt a digital signal sensor of RS485 type to improve the test precision. The digital signal sensor can make the test precision reach more than one ten-thousandth, and can improve the precision in the water spray detection and the leakage detection.
[0025] In this embodiment, the difference between the test product 13 and the standard good product is compared and tested in the active air release mode, the difference in pressure (i.e. the water spray loss) between the test product 13 and the standard good product is compared and tested, the slight difference in the air release flow rate between the product and the standard good product is compared and tested, and then the water outlet effect of the test product 13 is judged. The air storage tank, the large-flow pressure regulating valve 2 and the real-time monitoring of the gas source pressure are adopted to ensure that there is sufficient air release flow rate and stability in the air release stability and test stage. The air release speed-increasing technology is adopted to achieve the sound speed air release, improve the local pressure drop in the air release process, amplify the water spray loss difference between the test product 13 with the water spray defect and the good product, and cooperate with the digital signal gas pressure sensor to improve the precision of the water spray detection, so that the test precision of the pressure reading in the water spray and leakage test can reach ±1 Pa.
[0026] Embodiment 2
[0027] The utility model further provides a kind of detection method of water-free detection device, utilize the water-free detection device to carry out air-tightness test or water spray test;Wherein,
[0028] When air-tightness test is carried out:
[0029] The water outlet of workpiece is sealed by standard tool, pressure regulating valve 2 is adjusted to set inflation pressure, switch total valve 3, first air inlet valve 6 and second air inlet valve 7 are opened, air release valve 12 is closed, and normally open valve 11 is kept open, to make the pressure of system stable before air release;Pressure regulating valve 2 continues to work at set inflation pressure, while air release valve 12 is opened to release air to system, and the stable time of air release is 2-3 seconds, to make system enter stable air release state;After stabilization, the differential pressure rate of differential pressure sensor is read to judge whether there is leakage in the internal cavity of shower head or not;
[0030] When water spray test is carried out:
[0031] Pressure regulating valve 2 is adjusted to set inflation pressure, switch total valve 3, first air inlet valve 6 are opened, air release valve 12 is opened, and normally open valve 11 is closed, to make the pressure of system stable before air release;Pressure regulating valve 2 continues to work at set inflation pressure, to release air to first test pipeline 4, and the stable time of air release is 2-3 seconds, to make system enter stable air release state;After stabilization, the values of first air pressure sensor 8 and second air pressure sensor 9 at both ends of speed-up tube 15 are read in air release test stage, and the differential pressure value is calculated, the preset standard differential pressure value is subtracted from the calculated differential pressure value to obtain the water spray loss pressure drop of test product 13;When the tested water spray loss pressure drop is positive and greater than set water spray pressure drop standard, it is judged that the product water outlet effect is weak defect, and when the tested water spray loss pressure drop is negative and less than water spray leakage standard, it is judged that the product water outlet effect is leakage defect.
[0032] In the embodiment, when air-tightness test is carried out, the water outlet of product is sealed to carry out air-tightness test on the internal cavity of product, and when water spray test is carried out, the water outlet of product does not need to be sealed.Before testing the product to be detected in water spray test, standard good product workpiece can be tested first, the differential pressure value at both ends of speed-up tube 15 is detected after air release stabilization, and the standard differential pressure value is recorded as preset standard differential pressure;Then, the product to be tested is tested, and the preset standard differential pressure value is subtracted from test result, and the result is judged according to the result.Specifically, when the tested water spray loss pressure drop is positive and greater than preset water spray pressure drop standard, it is judged that the product water outlet effect is weak defect (i.e. hole blocking, oblique jet or bifurcation problem occurs), and when the tested water spray loss pressure drop is negative and less than water spray leakage standard (this standard is negative), it is judged that the product water outlet effect is leakage defect (i.e. water outlet hole is damaged and becomes large or obvious leakage problem).
[0033] The system can respectively carry out air tightness test and water spray test, improves test function, and reduces cost.
[0034] It should be understood that the above are only preferred embodiments of the present application, and the protection scope of the present application is not limited to the above examples only, and any technical solution falling within the scope of the present application is within the protection scope of the present application.
[0035] The above introduction of the drawings used in the embodiments only shows some embodiments of the present application, and should not be considered as limiting the scope, and for ordinary skilled in the art, other related drawings can be obtained without creative labor.
Claims
1. A water detection exempt device, characterized in that, The application relates to a testing device for testing the exhaust flow of a product, which comprises: an air inlet pipeline connected with an air source, a first testing pipeline in communication with the air inlet pipeline; wherein the first testing pipeline is adapted to be connected with the product to be tested, and a velocity increasing tube is arranged on the first testing pipeline and adapted to amplify the differential pressure value of the product to be tested caused by the slight change of the exhaust flow at the downstream end of the first testing pipeline; a first air pressure sensor is arranged at the upstream end of the velocity increasing tube, and a second air pressure sensor is arranged at the downstream end of the velocity increasing tube for detecting the air pressure values at the two ends of the velocity increasing tube respectively.
2. The water detection device of claim 1, wherein The velocity increasing tube has a fluid passage with a cross section smaller than that of the first testing pipeline, and the cross section of the fluid passage of the velocity increasing tube is 1 / 2-1 / 5 of that of the first testing pipeline.
3. The water detection device of claim 1, wherein, A first air inlet valve is arranged at the upstream end of the velocity increasing tube, and a gas releasing valve is arranged at the downstream end of the velocity increasing tube, and the downstream end of the gas releasing valve is adapted to be connected with the product to be tested.
4. The water detection device of claim 3, wherein The testing device further comprises a second testing pipeline in communication with the air inlet pipeline, a second air inlet valve is arranged on the second testing pipeline, and a differential pressure sensor is arranged at the downstream end of the second air inlet valve, and the other end of the differential pressure sensor is connected with a gas shunt connected with the downstream end of the velocity increasing tube for detecting the differential pressure value at the two ends of the velocity increasing tube.
5. The water detection device of claim 4, wherein, A normally open valve is arranged on the gas shunt for controlling the opening and closing of the gas shunt.
6. The water detection device of claim 5, wherein, A pressure regulating valve and an on-off valve are arranged on the air inlet pipeline for adjusting and controlling the air pressure of the first testing pipeline and the second testing pipeline.
7. The water detection device of claim 4, wherein, The first air pressure sensor and the second air pressure sensor are RS485 type digital signal sensors for improving the testing precision.
8. The water detection device of claim 4, wherein, A third air pressure sensor is arranged on the air inlet pipeline for detecting the air inlet pressure at the air source end.