CN220322631U - Inflatable qualitative leak detection device of electromagnetic flowmeter shell - Google Patents
Inflatable qualitative leak detection device of electromagnetic flowmeter shell Download PDFInfo
- Publication number
- CN220322631U CN220322631U CN202321685691.4U CN202321685691U CN220322631U CN 220322631 U CN220322631 U CN 220322631U CN 202321685691 U CN202321685691 U CN 202321685691U CN 220322631 U CN220322631 U CN 220322631U
- Authority
- CN
- China
- Prior art keywords
- pressurizing
- branch pipe
- shell
- pipe
- electromagnetic flowmeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 abstract description 26
- 238000002474 experimental method Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002791 soaking Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000036561 sun exposure Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The utility model relates to an inflation qualitative leakage detection device of an electromagnetic flowmeter shell, which comprises a pressurizing main pipe, wherein the main pressurizing main pipe is provided with an air compressor, the pressurizing main pipe is communicated with a pressurizing connecting device, and the pressurizing connecting device comprises a pressurizing branch pipe, an inflation connector communicated with the outlet end of the pressurizing branch pipe, a regulating valve and a first pressure sensor, wherein the regulating valve and the first pressure sensor are arranged on the pressurizing branch pipe; the inflation connector comprises a shell, a lower pressing plate is arranged in the shell, a through groove is formed in the shell above the lower pressing plate, an inflation tube is arranged on the through groove and the lower pressing plate, the inflation tube is communicated with a pressurizing branch pipe, a supporting plate is arranged below the shell, an inflation connecting nozzle is arranged on the inflation tube below the lower pressing plate, a sealing gasket is arranged on the outer side of the inflation connecting nozzle, and a connecting clamping groove is formed in the supporting plate below the lower pressing plate. The qualitative leakage detection of the welded electromagnetic flowmeter shell is realized. The utility model is convenient to adjust and use and has wide market prospect.
Description
Technical Field
The utility model relates to the field of verification of electromagnetic flowmeter shells, in particular to an inflatable qualitative leak detection device of an electromagnetic flowmeter shell.
Background
An electromagnetic flowmeter is an instrument which applies the principle of electromagnetic induction and measures the flow of conductive fluid according to the electromotive force induced when the conductive fluid passes through an externally applied magnetic field. The electromagnetic flowmeter has the following requirements on the external environment during installation: the flowmeter is preferably arranged indoors, if the flowmeter is required to be arranged outdoors, rainwater spraying, flooding and sun exposure should be avoided, and dampproof and sun-proof measures are required. The flowmeter should be protected from installation in environments containing corrosive gases and when necessary, ventilation is necessary. For convenient installation, maintenance and maintenance, a sufficient installation space is needed around the flowmeter. The installation place of the flowmeter should avoid magnetic field and strong vibration source, such as large vibration of the pipeline, and supports for fixing the pipeline are arranged at two sides of the flowmeter.
In the actual use process, since the measurement accuracy of the conventional electromagnetic flowmeter is relatively high under the condition of full pipe conveying, the conventional electromagnetic flowmeter is a product under the condition that the flow rate collecting electrode is arranged in the middle of the inner cavity of the electromagnetic flowmeter shell, and in the area requiring high-accuracy feedback, in order to ensure that the full pipe conveying electromagnetic flowmeter is generally arranged at the lowest part of a conveying pipe or in the area with a rising pipeline at the downstream of the electromagnetic flowmeter. The process is characterized in that the process is arranged in the area, particularly the area arranged at the lowest part of the conveying pipe, the whole or part of the shell of the electromagnetic flowmeter is soaked by rainwater in a short time easily due to high rainfall in a short time, and the process for protecting the electrical components arranged in the cavity between the shells of the electromagnetic flowmeter shell by using the sealing glue after the installation of the parts in the electromagnetic flowmeter shell is finished in the prior art. If the whole shell of the electromagnetic flowmeter is soaked in rainwater for a short time, disassembly and factory returning maintenance are needed according to the use requirement. However, if the electromagnetic flowmeter housing portion is immersed, there is still uncertainty as to whether or not the internal cavity between the immersed housing is able to function properly for a long period of time. Therefore, under the working condition, a soaking experiment is required to be carried out on the electromagnetic flowmeter shell according to the requirements in the protection level (IP code) of the shell of GB/T4208-2017.
The duration of use was 30 minutes as required by the short time immersion test of 0.15m to 1m in GB/T4208-2017, where 14.2.7 has a second characteristic number of 7. The test time is longer, if the test requirement is not met after the shell is installed, the installed shell is relatively troublesome to maintain after glue filling and sealing treatment, more time and labor are wasted, and after the electromagnetic flowmeter shell is welded, the qualification rate of the soaking test in the GB/T4208-2017 shell protection level (IP code) can be effectively improved by performing the qualitative leakage detection test. After the electromagnetic flowmeter shell is welded, namely, the inner wall of the electromagnetic flowmeter shell is not provided with a hole through which an electric wire required by connecting a flow rate acquisition electrode passes, in this state, the reserved hole is only a mounting hole at the top of the electromagnetic flowmeter shell for mounting a gauge outfit part, and the purpose of inflation leakage detection is to utilize the product to intuitively judge whether leakage points exist except for welding seams on the electromagnetic flowmeter shell. However, there is still a lack of correspondence in the market for qualitative leak detection of welded electromagnetic flowmeter housings.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides an inflation qualitative leakage detection device of an electromagnetic flowmeter shell, which can perform qualitative leakage detection on the welded electromagnetic flowmeter shell, and is used for overcoming the defects in the prior art.
The utility model adopts the technical scheme that: the utility model provides an electromagnetic flowmeter shell's qualitative leak hunting device of aerifing, includes the pressure boost is responsible for, and the main pressure boost is responsible for and is provided with the air compressor, is responsible for the outlet end in the pressure boost and is linked together and have the pressure boost connecting device, pressure boost connecting device include pressure boost branch pipe, the inflation connector that communicates on the pressure boost branch pipe outlet end and pressure boost branch pipe along being close to the pressure boost and being responsible for to the governing valve and the first pressure sensor that set gradually in the direction of keeping away from the pressure boost, pressure boost branch pipe and pressure boost are responsible for and are linked together; the inflation connector comprises a shell, a lower pressing plate is arranged in the shell, the lower pressing plate is of a plate-shaped structure capable of moving up and down along the inner cavity of the shell, a through groove is formed in the shell above the lower pressing plate, an inflation tube is arranged on the through groove and the lower pressing plate and is communicated with a pressurizing branch pipe, a supporting plate is arranged below the shell, an inflation connecting nozzle is arranged on the inflation tube below the lower pressing plate, a sealing gasket is arranged on the outer side of the inflation connecting nozzle, and a connecting clamping groove is formed in the supporting plate below the lower pressing plate.
Preferably, an air filter is arranged at the inlet end of the main pressurizing pipe, a first one-way valve and a buffer tank are sequentially arranged on the main pressurizing pipe between the air compressor and the pressurizing branch pipe along the direction from the air compressor to the pressurizing branch pipe, and a second pressure sensor is arranged on the buffer tank; the supercharging connecting device also comprises a second one-way valve arranged on the supercharging branch pipe between the first pressure sensor and the outlet end of the supercharging branch pipe.
Preferably, the shell adopts bottom open-ended drum form structure, is provided with the top board above the holding down plate, is provided with the head rod between top board and the holding down plate, is provided with the second connecting rod between shell and the backup pad, is provided with the screw thread lead screw above the top board, the top of shell is provided with the nut, nut and screw thread lead screw threaded connection, is provided with the bearing between screw thread lead screw and the top board.
Preferably, a sealing gasket is arranged on the lower pressing plate at the outer side of the inflatable connecting nozzle, and the cross section of the inner cavity of the connecting clamping groove is semicircular or arched.
Preferably, the bottom of the inflatable connecting nozzle adopts a circular truncated cone-shaped tubular structure, and the diameter of the circumcircle at the bottom of the inflatable connecting nozzle gradually becomes smaller along with the reduction of the height of the inflatable connecting nozzle.
Preferably, the supercharging connecting device further comprises a pressure relief pipe arranged on the supercharging branch pipe between the second one-way valve and the outlet end of the supercharging branch pipe, and a stop valve is arranged on the pressure relief pipe.
The utility model has the beneficial effects that: firstly, qualitative leak detection is carried out on the welded electromagnetic flowmeter shell, and shells which do not meet the requirement of customers on the soaking experiment are removed according to the judgment of qualitative leak detection, so that the qualification rate of the soaking experiment in the next step of GB/T4208-2017 shell protection level is effectively improved.
And secondly, the supporting plate is provided with the connecting clamping groove which is more convenient for clamping the lower edge of the flange of the fixed gauge outfit at the top of the electromagnetic flowmeter shell.
Finally, the outer side of the inflatable connecting nozzle is provided with a sealing gasket, the lower pressure plate at the outer side of the inflatable connecting nozzle is provided with a sealing gasket, the sealing gasket is positioned above the sealing gasket, the sealing gasket and the sealing gasket adopt an integrated structure, and the sealing gasket adopt annular structures made of rubber materials.
The utility model has the advantages of simple structure, convenient operation, ingenious design, great improvement of working efficiency, good social and economic benefits and easy popularization and use.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged partial schematic view of detail a of fig. 1.
Fig. 3 is a bottom view of the support plate of the present utility model.
Detailed Description
As shown in fig. 1 and 3, an inflation qualitative leakage detection device of an electromagnetic flowmeter shell comprises a pressurizing main pipe 1, wherein the pressurizing main pipe 1 is provided with an air compressor 2, an outlet end of the pressurizing main pipe 1 is communicated with a pressurizing connection device, the pressurizing connection device comprises a pressurizing branch pipe 3, an inflation connector communicated with the outlet end of the pressurizing branch pipe 3 and a regulating valve 4 and a first pressure sensor 5, wherein the regulating valve 4 and the first pressure sensor 5 are sequentially arranged along a direction from the pressurizing main pipe 1 to a direction far away from the pressurizing main pipe 1, and the pressurizing branch pipe 3 is communicated with the pressurizing main pipe 1.
The inflation connector comprises a shell 6, the shell 6 adopts a barrel-shaped structure with an opening at the bottom, a lower pressing plate 7 is arranged in the shell 6, the lower pressing plate 7 adopts a plate-shaped structure capable of moving up and down along the inner cavity of the shell 6, a through groove 8 is formed in the shell 6 above the lower pressing plate 7, an inflation tube 9 is arranged on the through groove 8 and the lower pressing plate 7, the inlet end of the inflation tube 9 is communicated with the outlet end of the pressurizing branch tube 3, a supporting plate 10 is arranged below the shell 6, an inflation connecting nozzle 11 is arranged on the inflation tube 9 below the lower pressing plate 7, an upper pressing plate 18 is arranged above the lower pressing plate 7, a first connecting rod 19 is arranged between the upper pressing plate 18 and the lower pressing plate 7, a second connecting rod 20 is arranged between the shell 6 and the supporting plate 10, a threaded lead screw 21 is arranged above the upper pressing plate 18, a nut 22 is arranged on the top of the shell 6, the nut 22 is in threaded connection with the threaded lead screw 21, and a bearing 23 is arranged between the threaded lead screw 21 and the upper pressing plate 18. Parallel to the threaded screw 21 through the slot 8. A handle 28 is provided on the threaded screw 21 above the housing 6.
The outside of the inflation connecting nozzle 11 is provided with a sealing gasket 12, the lower pressure plate 7 at the outside of the inflation connecting nozzle 11 is provided with a sealing gasket 24, the sealing gasket 24 is positioned above the sealing gasket 12, the sealing gasket 12 and the sealing gasket 24 adopt an integrated structure, and the sealing gasket 12 and the sealing gasket 24 adopt an annular structure made of rubber materials.
The supporting plate 10 below the lower pressing plate 7 is provided with a connecting clamping groove 25, and the cross section of the inner cavity of the connecting clamping groove 25 is semicircular or arched. In the prior art, the top of the electromagnetic flowmeter housing is usually provided with a flange for installing the fixed gauge outfit, so the connection clamping groove 25 formed on the product supporting plate 10 is more convenient for clamping the top of the electromagnetic flowmeter housing, and the top of the electromagnetic flowmeter housing is usually provided with a lower edge for installing the fixed gauge outfit flange.
The sealing gasket 12 and the sealing gasket 24 are both annular structures made of rubber materials. A second one-way valve 17 is provided on the pressure increasing branch pipe 3 between the first pressure sensor 5 and the outlet end of the pressure increasing branch pipe 3.
An air filter 13 is arranged on the inlet end of the main supercharging pipe 1, a first one-way valve 14 and a buffer tank 15 are sequentially arranged on the main supercharging pipe 1 between the air compressor 2 and the supercharging branch pipe 3 along the direction from the air compressor 2 to the supercharging branch pipe 3, and a second pressure sensor 16 is arranged on the buffer tank 15. The starting frequency of the air compressor 2 can be effectively reduced after the buffer tank 15 is installed.
The bottom of the inflatable connecting nozzle 11 adopts a circular truncated cone-shaped tubular structure, and the diameter of the circumcircle at the bottom of the inflatable connecting nozzle 11 gradually becomes smaller along with the reduction of the height of the inflatable connecting nozzle 11. The electromagnetic flowmeter is easier to insert into a reserved hole at the top of the electromagnetic flowmeter for installing the gauge head.
The supercharging connecting device also comprises a pressure relief pipe 26 arranged on the supercharging branch pipe 3 between the second one-way valve 17 and the outlet end of the supercharging branch pipe 3, and a stop valve 27 is arranged on the pressure relief pipe 26. The pressurizing branch pipe 3 and the pressure relief pipe 26 between the pressure relief pipe 26 and the inflation pipe 9 are all made of metal hoses.
The application method of the product is as follows: as shown in fig. 1 and 2, the preparation work before the experiment is required before the formal use is performed, and the specific process is as follows: the air compressor 2 is opened, the external atmosphere enters the buffer tank 15 through the air filter 13 to the pressurizing main pipe 1, and after the value fed back by the second pressure sensor 16 installed on the buffer tank 15 reaches the preset pressure, the preparation work of qualitative verification of the electromagnetic flowmeter shell is completed.
After the preparation work of qualitative verification of the electromagnetic flowmeter shell is completed, formal qualitative experiment work can be carried out, firstly, a reserved hole for installing a gauge head at the top of the electromagnetic flowmeter is connected to the inflatable connecting nozzle 11 of the product, and at the moment, the connecting clamping groove 25 on the supporting plate 10 is positioned at the lower edge of the flange for installing and fixing the gauge head on the electromagnetic flowmeter shell.
Then, the handle 28 is rotated, and the handle 28 drives the threaded screw rod 21 to rotate and drive the upper pressing plate 18, the lower pressing plate 7, the inflation tube 9 and the inflation connector 11 to move downwards. As the inflation connector 11 gradually goes deeper into the preformed hole for mounting the gauge outfit at the top of the electromagnetic flowmeter, the sealing gasket 12 and the sealing gasket 24 are gradually compressed, and after the sealing gasket 12 is compressed to a preset range, the continued rotation of the handle 28 is stopped.
Then, the regulating valve 4 is opened, the opening of the regulating valve 4 is reasonably adjusted according to the value fed back by the first pressure sensor 5, at the moment, high-pressure gas reserved in the buffer tank 15 sequentially passes through the pressurizing branch pipe 3, the inflating pipe 9 and the inflating connector 11 to enter the inter-shell cavity of the electromagnetic flowmeter shell, and when the value fed back by the first pressure sensor 5 is in a preset range, the regulating valve 4 is closed.
Finally, immersing the electromagnetic flowmeter shell into water, judging whether gas leaks from the welding seam or not by the straight pipe, and further judging qualitative leakage detection. After the qualitative leak detection is finished, the product is taken out of the water, the stop valve 27 is opened, the gas in the inter-shell cavity of the electromagnetic flowmeter shell is discharged through the pressure release pipe 26, and the electromagnetic flowmeter shell with the qualitative leak detection is taken down by rotating the handle 28 in the opposite direction, so that the next processing treatment is performed.
According to the embodiment, qualitative leakage detection of the welded electromagnetic flowmeter shell is realized, the shell which does not meet the requirement of a customer on a soaking experiment is removed according to the judgment of qualitative leakage detection, and the qualification rate of the soaking experiment in the next step of GB/T4208-2017 shell protection level (IP code) is effectively improved.
The utility model relates to an inflation qualitative leakage detection device of an electromagnetic flowmeter shell, which meets the requirements of workers in the verification field of electromagnetic flowmeter shells, so that the inflation qualitative leakage detection device has wide market prospect.
Claims (6)
1. The utility model provides an aerify qualitative leak hunting device of electromagnetic flowmeter casing which characterized in that: the device comprises a pressurizing main pipe (1), wherein the main pressurizing main pipe (1) is provided with an air compressor (2), the outlet end of the pressurizing main pipe (1) is communicated with a pressurizing connecting device, the pressurizing connecting device comprises a pressurizing branch pipe (3), an inflating connector communicated with the outlet end of the pressurizing branch pipe (3) and the pressurizing branch pipe (3), a regulating valve (4) and a first pressure sensor (5) are sequentially arranged along the direction from the pressurizing main pipe (1) to the direction away from the pressurizing main pipe (1), and the pressurizing branch pipe (3) is communicated with the pressurizing main pipe (1); the utility model provides an inflatable connector include casing (6), be provided with holding down plate (7) in casing (6), holding down plate (7) adopt the platelike structure that can do the up-and-down motion along casing (6) inner chamber, be provided with on casing (6) of holding down plate (7) top through groove (8), be provided with gas tube (9) on through groove (8) and holding down plate (7), gas tube (9) are linked together with pressure boost branch pipe (3), casing (6) below is provided with backup pad (10), be provided with on gas tube (9) of holding down plate (7) below and aerify connecting mouth (11), the outside of aerifing connecting mouth (11) is provided with sealing washer (12), has seted up on backup pad (10) of holding down plate (7) below and has been connected draw-in groove (25).
2. The apparatus for qualitative leak detection of inflation of an electromagnetic flowmeter housing of claim 1, wherein: an air filter (13) is arranged at the inlet end of the main pressurizing pipe (1), a first one-way valve (14) and a buffer tank (15) are sequentially arranged on the main pressurizing pipe (1) between the air compressor (2) and the pressurizing branch pipe (3) along the direction from the air compressor (2) to the pressurizing branch pipe (3), and a second pressure sensor (16) is arranged on the buffer tank (15); the supercharging connecting device also comprises a second one-way valve (17) arranged on the supercharging branch pipe (3) between the first pressure sensor (5) and the outlet end of the supercharging branch pipe (3).
3. The apparatus for qualitative leak detection of inflation of an electromagnetic flowmeter housing of claim 1, wherein: the shell (6) adopts bottom open-ended drum-shaped structure, and holding down plate (7) top is provided with top board (18), is provided with head rod (19) between top board (18) and holding down plate (7), is provided with second connecting rod (20) between shell (6) and backup pad (10), is provided with screw (21) above top board (18), the top of shell (6) is provided with nut (22), nut (22) and screw (21) threaded connection, is provided with bearing (23) between screw (21) and top board (18).
4. The apparatus for qualitative leak detection of inflation of an electromagnetic flowmeter housing of claim 1, wherein: the lower pressure plate (7) at the outer side of the inflatable connecting nozzle (11) is provided with a sealing gasket (24), and the cross section of the inner cavity of the connecting clamping groove (25) is semicircular or arched.
5. The apparatus for qualitative leak detection of inflation of an electromagnetic flowmeter housing of claim 1, wherein: the bottom of the inflatable connecting nozzle (11) adopts a circular truncated cone-shaped tubular structure, and the diameter of the circumcircle at the bottom of the inflatable connecting nozzle (11) gradually becomes smaller along with the reduction of the height of the inflatable connecting nozzle (11).
6. The apparatus for qualitative leak detection of inflation of an electromagnetic flowmeter housing of claim 2, wherein: the supercharging connecting device also comprises a pressure relief pipe (26) arranged on the supercharging branch pipe (3) between the second one-way valve (17) and the outlet end of the supercharging branch pipe (3), and a stop valve (27) is arranged on the pressure relief pipe (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321685691.4U CN220322631U (en) | 2023-06-30 | 2023-06-30 | Inflatable qualitative leak detection device of electromagnetic flowmeter shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321685691.4U CN220322631U (en) | 2023-06-30 | 2023-06-30 | Inflatable qualitative leak detection device of electromagnetic flowmeter shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220322631U true CN220322631U (en) | 2024-01-09 |
Family
ID=89415894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321685691.4U Active CN220322631U (en) | 2023-06-30 | 2023-06-30 | Inflatable qualitative leak detection device of electromagnetic flowmeter shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220322631U (en) |
-
2023
- 2023-06-30 CN CN202321685691.4U patent/CN220322631U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101021459A (en) | Battery circumferential welding withstand voltage testing device and testing method thereof | |
| CN205102986U (en) | Oil pump bracket leak hunting device | |
| CN111397816A (en) | PE valve air tightness test device | |
| CN220322631U (en) | Inflatable qualitative leak detection device of electromagnetic flowmeter shell | |
| CN108918040B (en) | Detection apparatus for automobile engine cylinder seal | |
| CN108693045A (en) | The online high pressure constant-pressure test system of rubber hose | |
| CN212167079U (en) | Performance testing device for membrane assembly flow guide net | |
| CN215832957U (en) | A frock of leaking hunting for turbo charger | |
| CN212007700U (en) | PE valve air tightness test device | |
| CN208187725U (en) | A kind of hydraulic type mechanical load of photovoltaic module test device | |
| CN216617821U (en) | Air inlet regulating valve of piston air compressor | |
| CN209953091U (en) | Special paint spraying apparatus of standard pipe | |
| CN110146266B (en) | Method for testing flow coefficient of high-pressure water mist spray head of hangar | |
| CN221549937U (en) | Rubber tube gas tightness detection device | |
| CN109612838B (en) | Pipe joint pressure-resistant fatigue test device and test method | |
| CN205977730U (en) | Heavy -calibre axial compressor pump performance test device | |
| CN206056875U (en) | Device for flushing inner wall of hydraulic pipe fitting and detecting pressure bearing of welding seam | |
| CN216695204U (en) | Quick exhaust mechanism who uses on flow calibration device | |
| CN219605586U (en) | Tightness detection device for water pump | |
| CN2368028Y (en) | Lifting water leakage checking machine | |
| CN218157231U (en) | PCCP steel cylinder pressure-bearing test device | |
| CN220932282U (en) | Semiconductor electric nozzle air tightness and air leakage detection device | |
| CN219736693U (en) | Waterproof testing device of instrument | |
| CN221631638U (en) | Waterproof property testing device for power supply assembly | |
| CN220490313U (en) | Air tightness test device for ship piping |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |