CN112414622A - Vacuum tire airtightness detection device - Google Patents
Vacuum tire airtightness detection device Download PDFInfo
- Publication number
- CN112414622A CN112414622A CN202011402026.0A CN202011402026A CN112414622A CN 112414622 A CN112414622 A CN 112414622A CN 202011402026 A CN202011402026 A CN 202011402026A CN 112414622 A CN112414622 A CN 112414622A
- Authority
- CN
- China
- Prior art keywords
- clamping
- disc
- support
- locking
- tire
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
- G01M17/021—Tyre supporting devices, e.g. chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a vacuum tire airtightness detection device, which comprises a gantry support, a transverse support, a support disc, a clamping disc and a clamping driving device, wherein two ends of the transverse support are respectively and fixedly connected with vertical beams on two sides of the gantry support, the support disc is upwards arranged on the upper part of the transverse support, the bottom or the side part of the support disc is provided with an air supply hole communicated with the top and is connected with an air pipe of a high-pressure air supply system, the clamping driving device is fixedly arranged on a gantry support cross beam on the upper part of the support disc, a driving rod points downwards to the clamping disc, the bottom of the clamping disc is fixedly connected or hinged with a driving rod of the clamping driving device, and the clamping disc. The tire inner cavity is clamped by the clamping disc and the supporting disc to form a closed space through driving the clamping disc to move by the clamping driving device, and compressed air is filled to detect whether cracks or nail holes of air leakage exist on the surface of the tire.
Description
Technical Field
The invention relates to the technical field of tire detection, in particular to a vacuum tire airtightness detection device which is simple in structure, safe, convenient, high in detection precision and efficiency and low in labor intensity.
Background
The quality of the tire is an important guarantee for ensuring the driving safety of motor vehicles and non-motor vehicles, and the strength and the air tightness of the tire are important factors for ensuring the use safety of the tire. The air tightness of the tire is related to the structure, the formula and the process, and the strength and the air tightness of the tire after molding and vulcanization need to be detected due to the difference between the raw material batch and the manufacturing process of a new tire, so that the strength of the material is graded and whether cracks, air holes or nail holes exist is detected, the components in the formula, the proportion of each component and process parameters can be adjusted and changed according to the detection result, the safety performance of a tire finished product can be better ensured, and the production yield can be improved.
The traditional method for detecting the air tightness of the tire is to place the tire in a basin or a groove filled with water, then manually or mechanically drive the tire to rotate, and observe the position where air bubbles appear through naked eyes or a camera so as to search an air leakage point and mark the air leakage point; in addition, a pressure gauge is adopted for direct detection, or a pressure and temperature sensor or a microphone is adopted for processing through a signal processing circuit for indirect detection; the detection methods are labor-consuming, complex in structure and complex to use, and generally only one tire can be detected at a time, so that the detection efficiency is low; particularly, the time for inflating and pressurizing the tire is limited, so that the local strength reduction caused by the defects of air holes, sand holes, impurities and the like in the tire is difficult to detect, and whether the strength of the tire is qualified or not cannot be determined, so that the subsequent use of the tire is influenced, and potential safety hazards are brought to the running of a motor vehicle. At present, vacuum tires have remarkable advantages and are widely applied to motor vehicles and non-motor vehicles, but the existing detection method needs to seal and inflate the inner side of the tire manually during detection, so that the working strength of detection personnel is high, and the detection efficiency is low due to the plugging process.
Disclosure of Invention
The invention aims to provide a vacuum tire airtightness detection device which is simple in structure, safe, convenient and fast, high in detection precision and efficiency and low in labor intensity.
The invention is realized by the following steps: the gantry clamping device comprises a gantry support, a transverse support, a supporting disc, a clamping disc and a clamping driving device, wherein two ends of the transverse support are fixedly connected with vertical beams on two sides of the gantry support respectively, the supporting disc is upwards arranged on the upper portion of the transverse support, an air supply hole communicated with the top is formed in the bottom or the side portion of the supporting disc and is connected with an air pipe of a high-pressure air supply system, the clamping driving device is fixedly arranged on a gantry support cross beam on the upper portion of the supporting disc, a driving rod points downwards to the clamping disc, the bottom of the clamping disc is fixedly connected or hinged with the driving rod of the clamping driving device, and the clamping disc is coaxial with.
The invention has the beneficial effects that:
1. according to the tire clamping device, the supporting plate and the clamping plate are arranged in an up-down opposite mode, the clamping driving device drives the clamping plate to move up and down and is matched with the supporting plate to clamp a tire for detection, the tire can be conveniently installed and taken on the supporting plate after the clamping plate moves upwards, and time and labor are saved.
2. The inner cavity of the tire to be tested can automatically form a closed space under the clamping of the clamping disc and the supporting disc, the air tightness and the strength of the tire can be detected by charging compressed air into the air delivery pipe at the bottom of the supporting disc, the problems of high working strength and low detection efficiency caused by manual sealing of the inner side during vacuum tire detection are solved, the tire to be tested can be adapted by adjusting the pressing amount of the clamping driving device according to tires of different specifications, and the tire to be tested is flexible to use and wide in application range.
3. According to the invention, the clamping driving device drives the clamping disc to move downwards to be matched with the supporting disc to clamp the tire, so that the tire is positioned from two sides and a closed space is formed in the inner cavity of the tire, the tire is in a non-dynamic balance state during detection, the detection precision and the safety are higher, and the maintaining time of high pressure in the tire can be set according to requirements, so that the problem of local strength reduction caused by defects of air holes, sand holes, inclusion and the like can be effectively detected, the tire airtightness and strength detection device can be used for detecting the tire airtightness and strength, and the safety of the detected tire is reliably guaranteed.
Therefore, the invention has the characteristics of simple structure, safety, convenience, high detection precision and efficiency and low labor intensity.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a second schematic structural diagram of the present invention;
FIG. 3 is a third schematic view of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 taken along line A-A;
FIG. 5 is an enlarged view of a portion of the cross-section taken along line B-B of FIG. 3;
FIG. 6 is a fourth schematic view of the present invention;
in the figure: 1-gantry support, 2-transverse support, 3-support plate, 3-1-air supply hole, 3-2-sealing ring, 4-clamping plate, 4-1-locking key part, 5-clamping driving device, 6-air pipe, 7-sleeve I, 8-guide rod I, 9-sleeve II, 10-guide rod II, 11-spring, 12-locking rod, 12-1-locking key part, 13-guide sleeve and 14-locking driving device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in figure 1, the gantry type air-conditioner comprises a gantry support 1, a transverse support 2, a support disc 3, a clamping disc 4 and a clamping driving device 5, wherein two ends of the transverse support 2 are respectively and fixedly connected with vertical beams on two sides of the gantry support 1, the support disc 3 is upwards arranged on the upper portion of the transverse support 2, an air supply hole 3-1 communicated with the top is formed in the bottom or side portion of the support disc 3 and is connected with an air pipe 6 of a high-pressure air supply system, the clamping driving device 5 is fixedly arranged on a transverse beam of the gantry support 1 on the upper portion of the support disc 3, a driving rod points downwards to the clamping disc 4, the bottom of the clamping disc 4 is fixedly connected with or hinged to a driving rod of the clamping driving device 5, and the clamping.
The air delivery pipe 6 is provided with a check valve, the bottom of the support disc 3 is fixedly provided with a pressure gauge communicated with the top, or the air delivery pipe 6 is provided with a pressure gauge between an air supply hole 3-1 interface and the check valve.
The top of the support disc 3 and/or the bottom of the clamping disc 4 is provided with at least one tyre shaping groove of different diameter.
The air supply hole 3-1 is communicated with the inner side disc surface of the innermost tire shaping groove at the top of the supporting disc 3.
As shown in fig. 2, at least one sleeve i 7 is fixedly arranged at the lower end of the cross beam of the gantry support 1 at the side of the clamping disc 4, and a guide rod i 8 which is slidably connected with the inner wall of the sleeve i 7 is fixedly arranged at the top end of the clamping disc 4.
The upper end of the transverse support 2 is fixedly provided with at least one sleeve II 9 on the lateral part of the support plate 3, the bottom end of the support plate 3 is fixedly provided with a guide rod II 10 in sliding connection with the inner wall of the sleeve II 9, and the sleeve II 9 and the guide rod II 10 are sleeved with a spring 11.
As shown in fig. 3, 4 and 5, the supporting disc 3 is vertically and coaxially provided with a through hole i in a penetrating manner, a locking rod 12 is slidably arranged in the through hole i, a guide sleeve 13 is coaxially and fixedly arranged on a transverse support 2 at the lower part of the through hole i, the lower part of the locking rod 12 is slidably connected with the inner wall of the guide sleeve 13, a locking hole is arranged at the lower part of the side wall of the guide sleeve 13, the lower end of the locking rod 12 is hinged with a driving rod of a locking driving device 14 transversely arranged on the transverse support 2, the upper end of the locking rod 12 extends out of the end surface of the supporting disc 3 and is provided with a locking key part 12-1, the bottom end of the clamping disc 4 is upwards provided with a T-shaped blind hole structure, and the locking key part.
The locking key part 12-1 is a non-circular structure with the minimum diameter larger than the connecting rod at the bottom, the bottom of the T-shaped structure of the locking key part 4-1 is consistent with the structure of the locking key part 12-1, and the top of the T-shaped structure of the locking key part 4-1 is an annular cavity with the diameter larger than the maximum diameter of the locking key part 12-1.
The locking key part 12-1 is in an oval, T-shaped, triangular, square or special-shaped structure.
At least one sealing ring 3-2 connected with the outer wall of the locking rod 12 in a sliding mode is arranged in the through hole I.
The body of the locking drive device 14 is hinged to the transverse support 2.
The clamping driving device 5 and/or the locking driving device 14 are cylinders or oil cylinders, and the driving rod of the clamping driving device 5 and/or the locking driving device 14 is a piston rod.
As shown in fig. 6, a support plate 3, a clamping plate 4, a clamping driving device 5, a sleeve i 7 and a guide rod i 8, a sleeve ii 9 and a guide rod ii 10, a spring 11, a locking rod 12, a locking driving device 14 and a locking key part 4-1 are symmetrically arranged on the gantry support 1 at the lower end of the transverse support 2 and are matched with each other.
The working process of the invention is as follows:
as shown in fig. 3, 4 and 5, before operation, according to the parameters of the structure, specification and the like of the vacuum tire to be detected, the corresponding supporting disc 3 and clamping disc 4 are selected and fixed. When the tire clamping device works, a tire to be detected is placed on the supporting plate 3, the inner edge of the tire to be detected is clamped on the tire shaping groove or positioned outside the tire shaping groove, then the switch is started, the clamping plate 4 moves downwards under the driving of the air cylinder 5, and the tire is clamped under the combined action of the spring 11 at the bottom of the supporting plate 3; meanwhile, a locking key part 12-1 of a locking rod 12 in the middle of the supporting disk 3 passes through a corresponding structure at the bottom of a locking key part 4-1 with a T-shaped structure in the clamping disk 4 along with the downward movement of the clamping disk 4 and enters an annular cavity at the top; after the clamping disc 4 moves downwards to a certain position, the trigger cylinder 14 acts to push the locking rod 12 to rotate for an angle, so that a locking key part 12-1 of the locking rod 12 and a locking key part 4-1 of the clamping disc 4 form a vertical locking structure; after locking, the triggering air pipe 6 fills compressed air with preset pressure into the closed space in the tire through the air supply hole 3-1, then the tire is stopped and pressure is maintained for a period of time, and an operator can find out the air leakage part only by simple touch and judgment in the pressure maintaining process and at the end of pressure maintaining, so that the strength and the sealing performance of the detected tire can be directly and accurately concluded. After the detection is finished, an operator closes the switch, and each mechanism reversely acts according to the process, so that the detected tire can be taken out and put into a corresponding position, and the tire airtightness detection process is finished once. Meanwhile, the portal frame 1 is provided with a plurality of groups of detection devices, so that the intensity and air tightness of a plurality of tires can be detected in a matched manner while one person operates the vulcanizing machine, and the detection efficiency can be obviously improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A vacuum tire airtightness detection device is characterized by comprising a gantry support (1), a transverse support (2), a support plate (3), a clamping plate (4) and a clamping driving device (5), two ends of the transverse bracket (2) are respectively fixedly connected with the vertical beams at two sides of the gantry bracket (1), the supporting disk (3) is upwards arranged at the upper part of the transverse bracket (2), the bottom or the side part of the supporting disk (3) is provided with an air supply hole (3-1) communicated with the top and is connected with an air pipe (6) of a high-pressure air supply system, the clamping driving device (5) is fixedly arranged on a beam of the gantry support (1) at the upper part of the supporting disc (3) and a driving rod points downwards to the clamping disc (4), the bottom of the clamping disc (4) is fixedly connected or hinged with a driving rod of the clamping driving device (5), and the clamping disc (4) is coaxial with the supporting disc (3).
2. The vacuum tire airtightness detection apparatus according to claim 1, wherein the top of the support plate (3) and/or the bottom of the clamping plate (4) is provided with at least one tire shaping groove of different diameter.
3. The vacuum tire airtightness detection apparatus according to claim 2, wherein the air supply hole (3-1) communicates with an inside plate surface of the innermost tire shaping groove at the top of the support plate (3).
4. The vacuum tire airtightness detection apparatus according to claim 1, wherein at least one sleeve i (7) is fixedly provided at the lower end of the cross beam of the gantry support (1) at the side of the clamping disk (4), and a guide rod i (8) slidably connected to the inner wall of the sleeve i (7) is fixedly provided at the top end of the clamping disk (4).
5. The vacuum tire airtightness detection apparatus according to claim 1, 2, 3 or 4, wherein at least one sleeve II (9) is fixedly provided at the upper end of the transverse support (2) at the side portion of the support plate (3), a guide rod II (10) slidably connected with the inner wall of the sleeve II (9) is fixedly provided at the bottom end of the support plate (3), and the sleeve II (9) and the guide rod II (10) are sleeved with a spring (11).
6. The vacuum tire airtightness detection apparatus according to claim 5, wherein the support plate (3) is vertically and coaxially provided with a through hole I therethrough, a locking rod (12) is arranged in the through hole I in a sliding manner, a guide sleeve (13) is coaxially and fixedly arranged on the transverse bracket (2) at the lower part of the through hole I, the lower part of the locking rod (12) is connected with the inner wall of the guide sleeve (13) in a sliding way, the lower part of the side wall of the guide sleeve (13) is provided with a locking hole, the lower end of the locking rod (12) is hinged with a driving rod of a locking driving device (14) transversely arranged on the transverse bracket (2), the upper end of the locking rod (12) extends out of the end surface of the supporting disk (3) and is provided with a locking spoon part (12-1), the bottom end of the clamping disc (4) is upwards provided with a T-shaped blind hole structure, and the bottom of the clamping disc can pass through a locking key part (4-1) of a locking key part (12-1).
7. The vacuum tire airtightness detection apparatus according to claim 6, wherein the lock key portion (12-1) has a non-circular configuration with a minimum diameter larger than that of the bottom connecting rod, the bottom of the "T" shaped configuration of the lock key portion (4-1) conforms to the configuration of the lock key portion (12-1), and the top of the "T" shaped configuration of the lock key portion (4-1) has an annular cavity with a diameter larger than that of the maximum diameter of the lock key portion (12-1).
8. The vacuum tire airtightness detection apparatus according to claim 7, wherein the lock key portion (12-1) has an oval, "T" -shaped, triangular, square-shaped or irregularly shaped configuration.
9. The apparatus for testing airtightness of a vacuum tire according to claim 6, wherein at least one sealing ring (3-2) slidably connected to an outer wall of the locking bar (12) is provided in the through-hole I.
10. The vacuum tire airtightness detection apparatus according to claim 6, wherein the gantry support (1) is symmetrically provided at the lower end of the transverse support (2) with a support plate (3), a clamping plate (4), a clamping drive device (5), a sleeve i (7) and a guide rod i (8), a sleeve ii (9) and a guide rod ii (10) and a spring (11), a locking lever (12) and a locking drive device (14) and a locking key portion (4-1) which are fitted with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011402026.0A CN112414622A (en) | 2020-12-04 | 2020-12-04 | Vacuum tire airtightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011402026.0A CN112414622A (en) | 2020-12-04 | 2020-12-04 | Vacuum tire airtightness detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112414622A true CN112414622A (en) | 2021-02-26 |
Family
ID=74830478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011402026.0A Pending CN112414622A (en) | 2020-12-04 | 2020-12-04 | Vacuum tire airtightness detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112414622A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446908A (en) * | 2021-07-20 | 2021-09-28 | 山西新华防化装备研究院有限公司 | Air bag blasting test fixture |
| CN117664478A (en) * | 2024-01-31 | 2024-03-08 | 张家港海锐达模压装备有限公司 | Dysmorphism head leakproofness detection device |
| CN117664461A (en) * | 2024-01-29 | 2024-03-08 | 山东中亚轮胎试验场有限公司 | Tyre airtight performance detection device |
-
2020
- 2020-12-04 CN CN202011402026.0A patent/CN112414622A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113446908A (en) * | 2021-07-20 | 2021-09-28 | 山西新华防化装备研究院有限公司 | Air bag blasting test fixture |
| CN113446908B (en) * | 2021-07-20 | 2022-11-15 | 山西新华防化装备研究院有限公司 | Air bag blasting test fixture |
| CN117664461A (en) * | 2024-01-29 | 2024-03-08 | 山东中亚轮胎试验场有限公司 | Tyre airtight performance detection device |
| CN117664461B (en) * | 2024-01-29 | 2024-05-14 | 山东中亚轮胎试验场有限公司 | Tyre airtight performance detection device |
| CN117664478A (en) * | 2024-01-31 | 2024-03-08 | 张家港海锐达模压装备有限公司 | Dysmorphism head leakproofness detection device |
| CN117664478B (en) * | 2024-01-31 | 2024-04-09 | 张家港海锐达模压装备有限公司 | Dysmorphism head leakproofness detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112414622A (en) | Vacuum tire airtightness detection device | |
| CN105510160B (en) | Novel finished clutch rubber air bag flex cracking test bed | |
| CN210690270U (en) | A compressive capacity detection device for drain pipe production | |
| CN213481643U (en) | Vacuum tire airtightness detection device | |
| CN106273588A (en) | Gas charging system after a kind of tyre vulcanizer | |
| CN109187169B (en) | Automatic detection equipment for automobile curtain | |
| CN101832846A (en) | Workbench for detecting air tightness of air valve | |
| CN206011780U (en) | A kind of superposing type tyre setting rear inflation apparatus | |
| CN212807485U (en) | Tool for detecting airtightness of brake box | |
| CN206348108U (en) | A kind of portable oil sump air tightness detection equipment of pallet | |
| CN112549180A (en) | Tire finished product hole pricking machine suitable for multiple specifications | |
| CN109855535B (en) | Device and method for detecting size of molded embryo | |
| CN219405536U (en) | OTR outer circumference control machine | |
| CN209295907U (en) | For testing the bounce value detection device of tire circularity | |
| CN107364159B (en) | Movable beam inflation precompression stroke controllable tire rear inflation device | |
| CN220198621U (en) | Simple inflatable shaping device for inner tube of bicycle before vulcanization | |
| CN221123262U (en) | Tire appearance defect detection equipment | |
| KR100594848B1 (en) | PCI rim descent position control apparatus of volcanizer | |
| CN220932290U (en) | Air tightness detection device for automobile parking motor cavity | |
| CN221055996U (en) | Flexible air tightness testing equipment for electric vehicle controller | |
| CN219870824U (en) | Material hardness testing device | |
| CN213933412U (en) | Convenient to use's mould detection device | |
| CN218938004U (en) | Plugging ball compression-resistant experimental equipment | |
| CN221124035U (en) | Concrete compression-resistant equipment for building engineering detection | |
| CN214871136U (en) | Tire finished product hole pricking machine suitable for multiple specifications |
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 |