CN111060255A - A detection device and detection method for sealing performance of a press-fit three-way connector - Google Patents
A detection device and detection method for sealing performance of a press-fit three-way connector Download PDFInfo
- Publication number
- CN111060255A CN111060255A CN201911265478.6A CN201911265478A CN111060255A CN 111060255 A CN111060255 A CN 111060255A CN 201911265478 A CN201911265478 A CN 201911265478A CN 111060255 A CN111060255 A CN 111060255A
- Authority
- CN
- China
- Prior art keywords
- push rod
- pneumatic push
- tee
- press
- connector
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/085—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for pipe joints or seals
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
本发明公开一种压合三通连接头密封性能检测装置和检测方法，通过上气动推杆向下推动下压板与工作台配合上下压紧三通连接头，再通过左气动推杆和右气动推杆将三通连接头顶紧在工作台的中间隔板以实现对三通连接头进行左右方向上的压紧定位，与此同时弹性定位推块和中间密封件的前密封件实现对三通连接头的前后定位，因此发明技术方案通过上述方式对三通连接头进行完全定位，使得三通连接头在密封性能测试过程中具有可靠的定位以及配合使用水箱以及向三通连接头内通入气体。相对现有技术，本发明技术方案具有结构简单、定位可靠且快速检测等优点，可快速地检测三通连接头的中部结构和主体结构焊接相连位置之间是否存在密封性能缺陷。
The invention discloses a testing device and a testing method for the sealing performance of a press-fit three-way connector. An upper pneumatic push rod is used to push down a lower pressure plate to cooperate with a workbench to press the three-way connector up and down, and then a left pneumatic push rod and a right pneumatic push rod are used to press the three-way connector. The push rod presses the tee connection head against the middle partition plate of the workbench to realize the pressing and positioning of the tee connection head in the left and right directions, and at the same time, the elastic positioning of the push block and the front seal of the middle seal realizes the tee connection. The front and rear positioning of the connector, so the technical solution of the invention completely locates the tee connector in the above-mentioned way, so that the tee connector has reliable positioning during the sealing performance test process and cooperates with the use of the water tank and the passage into the tee connector. gas. Compared with the prior art, the technical solution of the present invention has the advantages of simple structure, reliable positioning and rapid detection, etc., and can quickly detect whether there is a sealing performance defect between the middle structure of the tee connector and the welding connection position of the main structure.
Description
Technical Field
The invention relates to the technical field of pipeline connection, in particular to a device and a method for detecting the sealing performance of a pressing three-way connector.
Background
In the pipeline connection technology, often need to use tee junction head to link to each other the pipeline of different pipe diameters and form the connection system, and prior art's tee junction head mainly produces through the casting technique, but the casting technique production cycle is longer and makes production efficiency lower, meanwhile still there is inside casting defect easily and influences the actual working property of tee junction head, however the end uses the tee junction head that pressfitting cup joints the mode and connects, because its quality is lighter and through mould extrusion shaping main part, adopt welding mode again with intermediate part and main part welding link to each other as overall structure, above-mentioned processing mode can greatly improve production efficiency and is adopted by most enterprises.
However, the three-way connector produced by adopting the welding mode has a welding position, and the three-way connector needs to have better sealing performance when being actually used in the using process, so that a detection device for detecting the sealing performance needs to be designed correspondingly, and whether the defect structure such as insufficient sealing performance of the welding position exists or not is quickly and reliably detected.
Disclosure of Invention
The invention mainly aims to provide a detection device which is simple in structure, reliable in positioning and capable of quickly detecting the sealing performance of a pressing three-way connector.
In order to achieve the purpose, the invention provides a sealing performance detection device for a pressing three-way connector, which comprises an upper mounting bracket and a lower mounting bracket which are arranged up and down, wherein the upper mounting bracket and the lower mounting bracket are fixedly connected through a plurality of outer polished rods, a workbench is arranged between the upper mounting bracket and the lower mounting bracket, the top surface of the workbench is fixedly connected with the upper mounting bracket through a plurality of inner polished rods, the left side and the right side of the workbench are respectively and fixedly connected with a left pneumatic push rod and a right pneumatic push rod through brackets, a middle partition plate is arranged in the middle of the workbench, a lower press plate is arranged above the workbench and is connected with the inner polished rods in a sliding fit manner, a water tank with an opening at the top is arranged below the workbench and is connected with the outer polished rods in a sliding fit manner, an upper pneumatic push rod is arranged at the top of the upper mounting bracket, the telescopic shaft end of the, the flexible axle head of lower pneumatic push rod links to each other with the water tank bottom and promotes the water tank and reciprocates, and two tee bend connectors are symmetrical respectively and are placed in the workstation top surface, and the last sealing member of lower clamp plate bottom surface, the lower sealing member of workstation top surface, the middle sealing member of intermediate bottom side compress tightly the top end hole and the bottom hole of tee bend connector major structure and the middle end hole of middle part structure respectively, and the water tank rises and submergence tee bend connector.
Preferably, the lower pressure plate is provided with an air inlet pipe which penetrates through the lower pressure plate and the upper sealing piece simultaneously to convey air to the inner cavity of the three-way connector, and the other end of the air inlet pipe is connected with the air outlet end of the pressurizing cylinder.
Preferably, the middle sealing piece is a front sealing piece and a rear sealing plate which are connected into a whole from front to back, the front sealing piece is in a round platform-shaped structure, the outer diameter of the root of the front sealing piece is smaller than the inner diameter of a middle end hole of the middle structure of the three-way connector, the bottom of the upper sealing piece is of a hemispherical structure, the root of the upper sealing piece is inserted into the lower pressing plate, and the outlet end of the air inlet pipe is located at the bottom end.
Preferably, the telescopic ends of the left pneumatic push rod and the right pneumatic push rod are provided with elastic deformation push blocks which can be pressed on the surface of the side part of the three-way connector.
Preferably, the side surface of the elastic deformation pushing block is provided with an arc groove which is in contact with the surface of the side part of the three-way connector.
Preferably, the front panel and the rear panel of the water tank are made of transparent materials, and the outer surface of the rear panel is provided with a lamp capable of irradiating light rays towards the front panel.
Preferably, the bottom surface of the upper mounting bracket is provided with a plurality of infrared sensors for detecting hands, the infrared sensors are electrically connected with a master controller, and the master controller is also electrically connected with the upper pneumatic push rod, the lower pneumatic push rod, the left pneumatic push rod and the right pneumatic push rod.
The invention also provides a detection method using the device for detecting the sealing performance of the pressed three-way connector, which comprises the following steps:
step S1: an operator places the two three-way connectors on the top surface of the lower sealing piece of the workbench in a bilateral symmetry mode, and inserts the front sealing piece of the middle sealing piece into a middle end hole of the three-way connector;
step S2: the master controller synchronously controls the left pneumatic push rod and the right pneumatic push rod to respectively push the side parts of the three-way connectors at two sides to move towards the middle partition plate, and the middle end hole of the master controller is tightly propped against the surface of the rear sealing plate of the middle sealing piece;
step S3: the master controller controls the upper pneumatic push rod to push the lower pressing plate to move downwards, the hemispherical structure of the upper sealing element is tightly pressed on a hole at the top end of the three-way connecting head, and the three-way connecting head is pushed to be tightly pressed on the surface of the lower sealing element;
step S4: the air inlet pipe introduces air into the inner three-way connector, the main controller controls the lower pneumatic push rod to push the water tank to move upwards, the water body in the water tank completely immerses the three-way connector, an operator observes whether air leakage exists at the connecting position of the main structure and the middle structure of the three-way connector, if the air leakage exists in the main structure and the middle structure, the air leakage needs to be repaired, and if the air leakage does not exist in the main structure and the middle structure, the air leakage is used as a qualified piece;
step S5: the main control controls the lower pneumatic push rod, the left pneumatic push rod and the right pneumatic push rod in sequence, the upper pneumatic push rod resets, and an operator can take the three-way connector workpiece off the workbench.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the technical scheme, the upper pneumatic push rod pushes the lower pressing plate to be matched with the workbench to vertically press the three-way connector, the left pneumatic push rod and the right pneumatic push rod push the three-way connector against the middle partition plate of the workbench to press and position the three-way connector in the left-right direction, and meanwhile, the elastic positioning push block and the front sealing piece of the middle sealing piece are used for positioning the three-way connector front and back. In addition, air pressure is introduced into the three-way connector through the air inlet pipe arranged in the upper sealing piece, and the three-way connector is enabled to be arranged in the water body in the water tank, so that an operator can conveniently and rapidly judge whether the sealing performance exists between the welding connection positions of the middle structure and the main structure of the three-way connector.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for detecting the sealing performance of a compression three-way connector according to the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Upper |
82 | Lower seal |
| 2 | Upper mounting bracket | 9 | |
| 3 | Outer polished |
91 | |
| 4 | Inner polished |
92 | Lamp fitting |
| 5 | Lower |
10 | Lower |
| 51 | |
11 | |
| 511 | |
12 | Three- |
| 512 | |
121 | Main body structure |
| 6 | Right |
122 | |
| 61 | Elastic |
13 | Middle sealing element |
| 7 | Left |
131 | Front seal |
| 8 | Working table | 132 | |
| 81 | Intermediate partition board |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a device for detecting the sealing performance of a pressing three-way connector.
Referring to fig. 1 and 2, the device for detecting the sealing performance of a compression three-way connector according to an embodiment of the present invention includes an upper mounting bracket 2 and a lower mounting bracket 11 which are vertically disposed, the upper mounting bracket 2 and the lower mounting bracket 11 are fixedly connected through a plurality of outer polish rods 3, a workbench 8 is disposed between the upper mounting bracket 2 and the lower mounting bracket 11, the side portion of the top surface of the workbench 8 is fixedly connected with the upper mounting bracket 2 through a plurality of inner polish rods 4, the left and right sides of the workbench 8 are respectively and fixedly connected with a left pneumatic push rod 7 and a right pneumatic push rod 6 through brackets, a middle partition plate 81 is disposed in the middle of the workbench 8, a lower pressing plate 5 disposed above the workbench 8 is connected with the inner polish rods 4 in a sliding fit manner, so that the lower pressing plate 5 can move up and down relative to the inner polish rods 4, a water tank 9 with an opening at the top portion disposed below the workbench 8 is connected with, go up installing support 2 top and be equipped with pneumatic push rod 1, the flexible axle head of going up pneumatic push rod 1 links to each other with the 5 top surfaces of holding down plate and promotes holding down plate 5 and reciprocates, lower installing support 11 is equipped with pneumatic push rod 10 down, the flexible axle head of pneumatic push rod 10 links to each other with water tank 9 bottom and promotes water tank 9 and reciprocate down, two tee bend connectors 12 are symmetrical respectively and are placed in 8 top surfaces of workstation, the last sealing member 51 of holding down plate 5 bottom surface, the lower sealing member 82 of 8 top surfaces of workstation, the middle sealing member 13 of intermediate bottom 81 side compresses tightly the top hole and the bottom hole of tee bend connector 12 major structure 121 and the middle end hole of middle part structure 122 respectively, water tank 9 rises and submergence tee bend connector 12.
Since the device for detecting the sealing performance of the compression three-way connector of the embodiment detects the sealing performance of the three-way connector 12, the lower pressing plate 5 and the workbench 8 are mutually matched to be tightly pressed on the top end edge and the bottom end edge of the three-way connector 12 for sealing, the middle partition plate 82 performs side sealing on the middle end hole of the three-way connector 12, an air inlet pipe 52 is arranged on the lower pressure plate 5 and penetrates through the lower pressure plate 5 and the upper sealing element 51 simultaneously to convey air to the inner cavity of the three-way connector 12, the other end of the air inlet pipe 52 is connected with the air outlet end of a pressurizing cylinder (not shown in the figure), so that the air inlet pipe 52 fills a certain pressure of air into the three-way joint 12, and if a sealing defect occurs between the connecting positions of the middle structure 122 and the main structure 121 of the three-way joint 12, the air bubbles can be removed outwards through the sealing defects, so that an operator can conveniently observe whether the three-way connector 12 has the defects of sealing performance.
Preferably, the middle sealing member 13 of this embodiment includes a front sealing member 131 and a rear sealing plate 132 which are connected together, the front sealing member 131 is a circular truncated cone-shaped structure and has a root outer diameter smaller than the inner diameter of the middle end hole of the middle structure 122 of the three-way connection head 12, so that the middle seal 13 can reliably position and seal the middle end hole of the middle structure 122 of the three-way joint 12, and can prevent the front and rear displacement thereof, the bottom of the upper sealing member 51 has a hemispherical structure 511, the upper sealing element can be detachably connected with the bottom surface of the lower pressure plate 5, the outlet end of the air inlet pipe 512 is positioned at the bottom end of the hemispherical structure 511, therefore, the hemispherical structure 511 can position and line-seal the top hole of the three-way connector 12, and the three-way connector 12 can be well sealed even if a certain deviation exists between the center of the hemispherical structure 511 and the center of the main structure 121 of the three-way connector 12.
In addition, this embodiment still can compress tightly in three way connection 12 lateral part surface through being equipped with elastic deformation ejector pad 61 at left pneumatic putter 7 and the flexible end of right pneumatic putter 6, promotes respectively through left pneumatic putter 7 and right pneumatic putter 6 and sets up the middle end hole of three way connection 12 on left side and right side and more closely to middle sealing member 13 and seal. Preferably, the side surface of the elastic deformation pushing block 61 of the present embodiment is provided with a circular arc groove to contact with the side surface of the three-way connection head 12.
Therefore, in the embodiment, the upper and lower positioning and pressing of the three-way connector 12 are realized through the lower pressing plate 5 and the workbench 8, and the left pneumatic push rod 7 or the right pneumatic push rod 6 and the middle partition plate 81 perform left and right side pressing, positioning and sealing of the three-way connector 12 so as to realize complete positioning of the three-way connector 12.
The front panel and the rear panel 91 of the water tank 9 of the present embodiment are made of transparent materials, the outer surface of the rear panel 91 is provided with a lamp 92 capable of irradiating light towards the front panel, and an operator is located in the front position of the front panel to conveniently observe whether the three-way connector 12 leaks air or not.
The bottom surface of the upper mounting bracket 2 of other embodiments of the invention can be provided with a plurality of infrared sensors for detecting hands, the infrared sensors are electrically connected with a master controller, and the master controller is also electrically connected with the upper pneumatic push rod 1, the lower pneumatic push rod 10, the left pneumatic push rod 7 and the right pneumatic push rod 6 simultaneously so as to realize the automatic control of the corresponding pneumatic push rods to carry out corresponding compaction and recovery operation steps.
Referring to fig. 1 and fig. 2, an embodiment of the present invention further discloses a detection method using a device for detecting sealing performance of a pressed three-way connection head, firstly, an operator places two three-way connection heads 12 on the top surface of a lower sealing member 82 of a workbench 8 in a bilateral symmetry manner, and inserts a front sealing member 131 of a middle sealing member 13 into a middle end hole of the three-way connection head 12, and then a master controller synchronously controls a left pneumatic push rod 7 and a right pneumatic push rod 6 to respectively push side portions of the three-way connection heads 12 at two sides to move towards a middle partition 81, and enables the middle end hole to be tightly pressed against the surface of a rear sealing plate 132 of the middle sealing member 13; then the master controller controls the upper pneumatic push rod 1 to push the lower pressure plate 5 to move downwards, the hemispherical structure 511 of the upper sealing element 51 is tightly pressed on the top hole of the three-way connection 12, and the three-way connection 12 is pushed to be tightly pressed on the surface of the lower sealing element 82; then, the air inlet pipe 512 introduces air into the inner three-way connector 12, the pneumatic push rod 10 pushes the water tank 9 to move upwards under the control of the master controller, water in the water tank 9 completely submerges the three-way connector 12, an operator observes whether air leakage exists at the connecting position of the main body structure 121 and the middle structure 122 of the three-way connector 12, if air leakage exists between the main body structure 121 and the middle structure 122, the part needs to be repaired, and if air leakage does not exist, the part is stored as a qualified part; and finally, the lower pneumatic push rod 10, the left pneumatic push rod 7, the right pneumatic push rod 6 and the upper pneumatic push rod 1 are sequentially controlled to reset through master control, and an operator can take the three-way connector 12 down from the workbench 8.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911265478.6A CN111060255A (en) | 2019-12-11 | 2019-12-11 | A detection device and detection method for sealing performance of a press-fit three-way connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911265478.6A CN111060255A (en) | 2019-12-11 | 2019-12-11 | A detection device and detection method for sealing performance of a press-fit three-way connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111060255A true CN111060255A (en) | 2020-04-24 |
Family
ID=70298794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911265478.6A Pending CN111060255A (en) | 2019-12-11 | 2019-12-11 | A detection device and detection method for sealing performance of a press-fit three-way connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111060255A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115342984A (en) * | 2022-08-31 | 2022-11-15 | 光隆精密工业（福州）有限公司 | Special watertight detection fixture for marine diesel filter system adapter and its working method |
| CN118913540A (en) * | 2024-10-12 | 2024-11-08 | 常州市苏南环保设备有限公司 | Air tightness detection equipment and detection method for dry fog dust suppression assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928661A (en) * | 2016-07-01 | 2016-09-07 | 天津众达精密机械有限公司 | Modularized casting airtight detection equipment |
| CN106768675A (en) * | 2017-02-09 | 2017-05-31 | 昌乐圣鑫管业有限公司 | Threeway four-way pressure testing machine |
| CN211373957U (en) * | 2019-12-11 | 2020-08-28 | 广东顺德安耐特金属科技有限公司 | Detection device for sealing performance of press-fit three-way connector |
-
2019
- 2019-12-11 CN CN201911265478.6A patent/CN111060255A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928661A (en) * | 2016-07-01 | 2016-09-07 | 天津众达精密机械有限公司 | Modularized casting airtight detection equipment |
| CN106768675A (en) * | 2017-02-09 | 2017-05-31 | 昌乐圣鑫管业有限公司 | Threeway four-way pressure testing machine |
| CN211373957U (en) * | 2019-12-11 | 2020-08-28 | 广东顺德安耐特金属科技有限公司 | Detection device for sealing performance of press-fit three-way connector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115342984A (en) * | 2022-08-31 | 2022-11-15 | 光隆精密工业（福州）有限公司 | Special watertight detection fixture for marine diesel filter system adapter and its working method |
| CN118913540A (en) * | 2024-10-12 | 2024-11-08 | 常州市苏南环保设备有限公司 | Air tightness detection equipment and detection method for dry fog dust suppression assembly |
| CN118913540B (en) * | 2024-10-12 | 2025-02-14 | 常州市苏南环保设备有限公司 | Air tightness detection equipment and detection method for dry fog dust suppression assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111060255A (en) | A detection device and detection method for sealing performance of a press-fit three-way connector | |
| CN107478304B (en) | Verification device and method for automatic fixation of water meter and adjustment of visual pose | |
| CN216247073U (en) | Water detection tool for sealing performance of automobile air conditioner pipeline | |
| CN211373957U (en) | Detection device for sealing performance of press-fit three-way connector | |
| CN206648788U (en) | A kind of testing agency of medical needle air-tightness | |
| CN120644894B (en) | A plate-fin heat exchanger welding equipment | |
| CN207577774U (en) | A robot welding tool | |
| CN206484191U (en) | A kind of automobile accessory frame clamp for machining | |
| CN216349381U (en) | Car light assembly gas tightness detection device | |
| CN112025191B (en) | An adjustable pneumatic tool for aluminum welding type test | |
| CN212645563U (en) | A kind of automobile exhaust flexible pipe seal detection and positioning device | |
| CN216829330U (en) | A front welding fixture and equipment for piston engine gas storage tank accessories | |
| CN216829329U (en) | Piston machine gas holder accessory welding jig and equipment | |
| CN217276725U (en) | Automobile fuel tank sealing performance detection method | |
| CN216370949U (en) | Automatic splicing device for metal pipe and steel joint | |
| CN214538415U (en) | Air tightness detection device for braided hose connector | |
| CN212552650U (en) | Double-buckle hose inner plug assembling system | |
| CN203703493U (en) | Pipe orifice plugging device | |
| CN210005184U (en) | automatic air tightness detection assembly based on multi-station detection machine | |
| CN223435718U (en) | A valve body air tightness testing device | |
| CN223306524U (en) | Crimping mechanism for preventing virtual crimping | |
| CN209342302U (en) | A detection device for weld air tightness | |
| CN108247272A (en) | A kind of non-porous total member auxiliary mould | |
| CN217155453U (en) | High-precision capillary tube blockage detecting machine | |
| CN114714025A (en) | A welding positioning tool for elbow wing tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200424 |