CN113740166B - Accurate test and automatic recording device of cylinder cap CID pressure blasting - Google Patents
Accurate test and automatic recording device of cylinder cap CID pressure blasting Download PDFInfo
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- CN113740166B CN113740166B CN202110873508.2A CN202110873508A CN113740166B CN 113740166 B CN113740166 B CN 113740166B CN 202110873508 A CN202110873508 A CN 202110873508A CN 113740166 B CN113740166 B CN 113740166B
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- 238000012360 testing method Methods 0.000 title claims abstract description 62
- 238000005422 blasting Methods 0.000 title claims description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 239000000523 sample Substances 0.000 claims abstract description 31
- 238000003825 pressing Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000009172 bursting Effects 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000004880 explosion Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000007405 data analysis Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
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- 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
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- 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
- G01N3/06—Special adaptations of indicating or recording means
-
- 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
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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- 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)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a cylindrical cap CID pressure explosion accurate test and automatic recording device, which comprises a bottom plate, a fixed component, an upright post, a top plate, a lower pressing cylinder, a piston rod, a cap pressing head, an upper test probe, a lower test probe, a test sealing cavity, a pressure regulating gas interface, an O-shaped ring, a first transmission line, a second transmission line, an online ammeter, an online pressure meter, a data acquisition line and a third transmission line, wherein the bottom of the bottom plate is fixedly connected with the center of the top of the fixed component; the invention replaces the traditional range value detection mode with the accurate value detection mode, and can record the variation of the resistance and the pressure of the cap CID in real time in the test process through the continuous pressurization test, thereby accurately measuring the disconnection pressure value and the bursting pressure value of the cap CID, improving the production quality of the cap CID, enhancing the safety protection performance of the cap CID, adopting the split fixing mode, being convenient for disassembly, assembly and replacement, having small labor intensity and saving the maintenance cost.
Description
Technical Field
The invention relates to the technical field of battery production, in particular to a cylindrical cap CID pressure explosion accurate test and automatic recording device.
Background
CID, abbreviated to current interrupt device, is called a current cut-off device, and is a safety protection device for batteries. When the battery core is abnormal, the CID welding point is disconnected after the internal pressure reaches a certain degree or under the action of pressure, so that the external current is disconnected; when the pressure is further increased by the gas generated by the chemical reaction, CID bursts to release the pressure. The breaking pressure and the bursting pressure of the CID are very important indicators of the safety of the battery, and in terms of the safety design of the battery, the selection of the breaking pressure and the bursting pressure suitable for the application scene is very important. Due to the unrecoverable nature of the breaking and blasting of the CID, different action pressure values need to be used for different application environments, and the more accurate the more favorable the safety design of the battery, the safety protection action cannot be generated, and the protection cannot be generated in advance, so that the battery core fails.
At present, the battery cell manufacturer detects the action pressure of the cap CID by adopting a rough range value detection mode, only detects by using a fixed pressure value which is larger than the breaking pressure of the cap CID specification to judge whether the cap CID is qualified, the breaking pressure value and the bursting pressure value of the cap CID cannot be accurately measured, the production quality is poor, the safety protection performance is insufficient, the data analysis of the breaking pressure and the bursting pressure of the cap CID is difficult to carry out by adopting the range value detection mode, the CID manufacturing process cannot be optimized, meanwhile, the whole fixing mode is mostly adopted, the whole cap CID needs to be disassembled and replaced after the cap CID breaks down, the labor intensity of personnel is high, and the maintenance cost of the device is increased.
Disclosure of Invention
The invention aims to provide a cylindrical cap CID pressure explosion accurate test and automatic recording device, which aims to solve the problems of poor detection precision, difficult process optimization and inconvenient disassembly, assembly and replacement in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a cylinder cap CID pressure blasting accurate test and automatic recording device, includes bottom plate, fixed subassembly, stand, roof, down the air cylinder, piston rod, block hold-down head, goes up test probe, down test probe, test seal chamber, pressure regulating gas interface, O type circle, first transmission line, second transmission line, online ampere meter, online manometer, data acquisition line and third transmission line, the bottom of bottom plate and the central fixed connection at fixed subassembly top, fixed subassembly comprises hold-down frame, spacing groove, stopper, locating hole, reference column, spread groove, connecting plate, connecting screw, fixed frame, otic placode and fixed orifices, and the bottom of holding-down frame is through spacing groove and stopper activity cup joint on the bottom plate, and the four corners of fixed frame bottom inner edge all is provided with the otic placode through locating hole, reference column, spread groove, connecting plate, connecting screw and the top fixed connection of fixed frame, and the fixed hole has been seted up at the center at otic placode top.
Preferably, four corners at the top of the bottom plate are fixedly sleeved with one end of the upright post, the other end of the upright post is fixedly connected with four corners at the bottom of the top plate respectively, a lower pressing cylinder is fixedly arranged at the center of the top plate, the output end of the lower pressing cylinder is fixedly connected with one end of a piston rod, the other end of the piston rod is fixedly connected with the center of the top of the cap pressing head, and the center of the bottom of the cap pressing head is fixedly connected with one end of the upper test probe.
Preferably, the center at the top of the bottom plate is fixedly sleeved with one end of the lower test probe, the inner edge at the top of the bottom plate is fixedly connected with the outer edge at the bottom of the test sealing cavity, a pressure regulating gas interface is arranged at the center of one side of the test sealing cavity, and the inner edge at the top of the test sealing cavity is fixedly connected with the bottom of the O-shaped ring.
Preferably, the top of the side surface of the upper test probe and the center of the other side of the test sealing cavity are fixedly connected with one ends of a first transmission line and a second transmission line respectively, the other ends of the first transmission line and the second transmission line are fixedly connected with the input ends of an online ammeter and an online pressure meter respectively, the output ends of the online ammeter and the online pressure meter are fixedly connected with one end of a data acquisition line, the other end of the data acquisition line is fixedly connected with the input end of an industrial computer, one end of the data acquisition line is fixedly connected with one end of a third transmission line, and the other end of the third transmission line is fixedly sleeved with one end of the lower test probe.
Preferably, both sides of the bottom of the cap pressing head and the other end of the upper test probe are respectively contacted with the center and both sides of the top of the cylindrical cap CID, and the center and the outer edge of the bottom of the cylindrical cap CID are respectively contacted with the other end of the lower test probe and the top of the O-shaped ring.
Preferably, the limiting grooves are respectively formed in four sides of the bottom of the pressing frame, limiting blocks are embedded in the limiting grooves, and the limiting blocks are respectively arranged in four sides of the bottom plate.
Preferably, the locating holes are respectively arranged at four corners of the bottom of the pressing frame, locating columns are embedded in the locating holes, and one ends of the locating columns are respectively fixedly connected with four corners of the top of the fixing frame.
Preferably, the connecting grooves are respectively arranged on four sides of the top of the fixed frame, connecting plates are embedded in the connecting grooves, and the tops of the connecting plates are respectively fixedly connected with four sides of the bottom of the pressing frame.
Preferably, the connecting screw holes are respectively formed in the centers of the side surfaces of the connecting groove and the connecting plate, and the connecting screw holes are embedded with connecting screws.
Compared with the prior art, the invention has the beneficial effects that: according to the cylindrical cap CID pressure explosion accurate test and automatic recording device, a traditional range value detection mode is replaced by an accurate value detection mode, and the changes of the cap CID resistance and the pressure can be recorded in real time in the test process through continuous pressurization test, so that the disconnection pressure value and the explosion pressure value of the cap CID are accurately measured, the production quality of the cap CID is improved, and the safety protection performance of the cap CID is enhanced; the accurate value detection mode is adopted, the change of the breaking pressure value and the bursting pressure value of the CID of the cap is recorded in real time, and the data analysis of the breaking pressure and the bursting pressure of the CID is convenient for personnel, so that the CID manufacturing process is optimized; the split fixing mode is adopted, the whole disassembly, assembly and replacement are not needed after the fault occurs, the labor intensity of personnel is low, and the maintenance cost of the device is saved;
Drawings
FIG. 1 is a front partial cross-sectional view of the overall structure of the present invention;
FIG. 2 is a top view of the overall structure of the present invention;
FIG. 3 is a bottom view of the overall structure of the present invention;
FIG. 4 is a perspective view of a compression frame of the present invention;
FIG. 5 is a perspective view of a fixing frame according to the present invention;
In the figure: 1. a bottom plate; 2. a fixing assembly; 201. a compression frame; 202. a limit groove; 203. a limiting block; 204. positioning holes; 205. positioning columns; 206. a connecting groove; 207. a connecting plate; 208. a connecting screw hole; 209. a connecting screw; 210. a fixed frame; 211. ear plates; 212. a fixing hole; 3. a column; 4. a top plate; 5. a pressing cylinder; 6. a piston rod; 7. a cap pressing head; 8. a test probe is arranged on the probe; 9. a lower test probe; 10. testing the sealing cavity; 11. a pressure regulating gas interface; 12. an O-ring; 13. a first transmission line; 14. a second transmission line; 15. an online ammeter; 16. an online pressure gauge; 17. a data acquisition line; 18. and a third transmission line.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, an embodiment of the present invention is provided: the utility model provides a cylinder cap CID pressure blasting accurate test and automatic recording device, including bottom plate 1, fixed subassembly 2, stand 3, roof 4, down force cylinder 5, piston rod 6, the block compresses tightly head 7, go up test probe 8, down test probe 9, test seal chamber 10, pressure regulating gas interface 11, O circle 12, first transmission line 13, second transmission line 14, online ammeter 15, online manometer 16, data acquisition line 17 and third transmission line 18, the bottom of bottom plate 1 and the central fixed connection at fixed subassembly 2 top, fixed subassembly 2 is by compressing tightly frame 201, Spacing groove 202, stopper 203, locating hole 204, reference column 205, spread groove 206, connecting plate 207, connecting screw 208, connecting screw 209, fixed frame 210, otic placode 211 and fixed orifices 212 constitute, compress tightly frame 201 and cup joint on bottom plate 1 through spacing groove 202 and stopper 203 activity, spacing groove 202 is seted up respectively at four sides of compressing tightly frame 201 bottom, the inside of spacing groove 202 is inlayed and is equipped with stopper 203, stopper 203 sets up respectively at four sides of bottom plate 1 bottom, the bottom of compressing tightly frame 201 is through locating hole 204, reference column 205, spread groove 206, The connecting plate 207, the connecting screw holes 208 and the connecting screws 209 are fixedly connected with the top of the fixed frame 210, the positioning holes 204 are respectively arranged at four corners of the bottom of the compression frame 201, the positioning columns 205 are embedded in the positioning holes 204, one ends of the positioning columns 205 are respectively fixedly connected with four corners of the top of the fixed frame 210, the connecting grooves 206 are respectively arranged at four sides of the top of the fixed frame 210, the connecting plates 207 are embedded in the connecting grooves 206, the top of the connecting plates 207 are respectively fixedly connected with four sides of the bottom of the compression frame 201, the connecting screw holes 208 are respectively arranged at the centers of the side surfaces of the connecting grooves 206 and the connecting plates 207, the connecting screw 209 is embedded in the connecting screw hole 208, the four corners of the inner edge of the bottom of the fixed frame 210 are provided with the lug plates 211, the center of the top of each lug plate 211 is provided with the fixed hole 212, and the split fixing mode is adopted, so that the whole assembly, disassembly and replacement are not needed after the fault occurs, the labor intensity of personnel is low, and the maintenance cost of the device is saved; the four corners at the top of the bottom plate 1 are fixedly sleeved with one end of the upright post 3, the other end of the upright post 3 is fixedly connected with the four corners at the bottom of the top plate 4 respectively, the center at the top of the top plate 4 is fixedly provided with a lower pressing cylinder 5, the output end of the lower pressing cylinder 5 is fixedly connected with one end of a piston rod 6, the other end of the piston rod 6 is fixedly connected with the center at the top of a cap pressing head 7, the center at the bottom of the cap pressing head 7 is fixedly connected with one end of an upper test probe 8, the center at the top of the bottom plate 1 is fixedly sleeved with one end of a lower test probe 9, the inner edge at the top of the bottom plate 1 is fixedly connected with the outer edge at the bottom of a test sealing cavity 10, the center at one side of the test sealing cavity 10 is provided with a pressure regulating gas interface 11, the inner edge of the top of the test sealing cavity 10 is fixedly connected with the bottom of the O-shaped ring 12, the two sides of the bottom of the cap pressing head 7 and the other end of the upper test probe 8 are respectively contacted with the center and two sides of the top of the cylindrical cap CID, the center and the outer edge of the bottom of the cylindrical cap CID are respectively contacted with the other end of the lower test probe 9 and the top of the O-shaped ring 12, the traditional range value detection mode is replaced by the accurate value detection mode, the variation of the resistance and the pressure of the cap CID can be recorded in real time in the test process through the continuous pressurization test, thereby accurately measuring the breaking pressure value and the bursting pressure value of the cap CID, improving the production quality of the cap CID, the safety protection performance of the cap CID is enhanced; the top end of the side surface of the upper test probe 8 and the center of the other side of the test sealing cavity 10 are fixedly connected with one end of a first transmission line 13 and one end of a second transmission line 14 respectively, the other ends of the first transmission line 13 and the second transmission line 14 are fixedly connected with the input ends of an online ammeter 15 and an online pressure meter 16 respectively, the output ends of the online ammeter 15 and the online pressure meter 16 are fixedly connected with one end of a data acquisition line 17, the other end of the data acquisition line 17 is fixedly connected with the input end of an industrial computer, one end of the data acquisition line 17 is fixedly connected with one end of a third transmission line 18, the other end of the third transmission line 18 is fixedly sleeved with one end of the lower test probe 9, the accurate value detection mode is adopted to record the change of the breaking pressure value and the bursting pressure value of the CID of the cap in real time, thereby being convenient for personnel to carry out data analysis on the breaking pressure and the bursting pressure of the CID and optimizing the manufacturing process of the CID.
Working principle: when the device is used, firstly, a cylindrical cap CID to be detected is placed on an O-shaped ring 12, then, a lower pressing cylinder 5 is started, a cap pressing head 7 is driven by a piston rod 6 to press the cylindrical cap CID, an upper test probe 8 and a lower test probe 9 are matched to detect the breaking pressure and the bursting pressure of the cylindrical cap CID, meanwhile, the change of the breaking pressure value and the bursting pressure value of the cylindrical cap CID is recorded in real time through a first transmission line 13, a second transmission line 14, an online ammeter 15, an online pressure meter 16, a data acquisition line 17 and a third transmission line 18, further, the data analysis is carried out through an industry and a computer, the manufacturing process of the cylindrical cap CID is optimized, finally, a connecting screw 209 is separated from a connecting screw hole 208, a connecting plate 207 is separated from a connecting groove 206, a positioning column 205 is separated from a positioning hole 204, a limiting block 203 is separated from a limiting groove 202, the pressing frame 201 is taken down from a fixed frame 210, and then, the base plate 1 is taken out from the fixed assembly 2, the whole is not required to be disassembled and replaced, the labor intensity of personnel is low, and the maintenance cost of the device is saved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (1)
1. The utility model provides a cylinder cap CID pressure blasting accurate test and automatic recording device, including bottom plate (1), fixed subassembly (2), stand (3), roof (4), cylinder (5) down, piston rod (6), closing cap compress tightly head (7), go up test probe (8), test probe (9) down, test seal chamber (10), pressure regulating gas interface (11), O type circle (12), first transmission line (13), second transmission line (14), online ammeter (15), online manometer (16), data acquisition line (17) and third transmission line (18), its characterized in that: the bottom of the bottom plate (1) is fixedly connected with the center of the top of the fixing component (2), the fixing component (2) is composed of a compression frame (201), a limiting groove (202), a limiting block (203), a positioning hole (204), a positioning column (205), a connecting groove (206), a connecting plate (207), a connecting screw hole (208), a connecting screw (209), a fixing frame (210), an ear plate (211) and a fixing hole (212), the compression frame (201) is movably sleeved on the bottom plate (1) through the limiting groove (202) and the limiting block (203), the bottom of the compression frame (201) is fixedly connected with the top of the fixing frame (210) through the positioning hole (204), the positioning column (205), the connecting groove (206), the connecting plate (207), the connecting screw hole (208) and the connecting screw (209), and the four corners of the inner edge of the bottom of the fixing frame (210) are respectively provided with the ear plate (211), and the center of the top of the ear plate (211) is provided with the fixing hole (212);
Four corners at the top of the bottom plate (1) are fixedly sleeved with one end of the upright post (3), the other end of the upright post (3) is fixedly connected with four corners at the bottom of the top plate (4) respectively, a lower pressing cylinder (5) is fixedly arranged at the center of the top plate (4), the output end of the lower pressing cylinder (5) is fixedly connected with one end of a piston rod (6), the other end of the piston rod (6) is fixedly connected with the center of the top of a cap pressing head (7), and the center of the bottom of the cap pressing head (7) is fixedly connected with one end of an upper test probe (8);
the center of the top of the bottom plate (1) is fixedly sleeved with one end of the lower test probe (9), the inner edge of the top of the bottom plate (1) is fixedly connected with the outer edge of the bottom of the test sealing cavity (10), the center of one side of the test sealing cavity (10) is provided with a pressure regulating gas interface (11), and the inner edge of the top of the test sealing cavity (10) is fixedly connected with the bottom of the O-shaped ring (12);
The top end of the side surface of the upper test probe (8) and the center of the other side of the test sealing cavity (10) are fixedly connected with one end of a first transmission line (13) and one end of a second transmission line (14) respectively, the other ends of the first transmission line (13) and the second transmission line (14) are fixedly connected with the input ends of an online ammeter (15) and an online pressure meter (16) respectively, the output ends of the online ammeter (15) and the online pressure meter (16) are fixedly connected with one end of a data acquisition line (17), the other end of the data acquisition line (17) is fixedly connected with the input end of an industrial computer, one end of the data acquisition line (17) is fixedly connected with one end of a third transmission line (18), and the other end of the third transmission line (18) is fixedly sleeved with one end of the lower test probe (9);
The two sides of the bottom of the cap pressing head (7) and the other end of the upper test probe (8) are respectively contacted with the center and the two sides of the top of the cylindrical cap CID, and the center and the outer edge of the bottom of the cylindrical cap CID are respectively contacted with the other end of the lower test probe (9) and the top of the O-shaped ring (12);
The limiting grooves (202) are respectively formed in four sides of the bottom of the pressing frame (201), limiting blocks (203) are embedded in the limiting grooves (202), and the limiting blocks (203) are respectively arranged in four sides of the bottom plate (1);
The positioning holes (204) are respectively formed in four corners of the bottom of the pressing frame (201), positioning columns (205) are embedded in the positioning holes (204), and one ends of the positioning columns (205) are respectively fixedly connected with four corners of the top of the fixing frame (210);
the connecting grooves (206) are respectively formed in four sides of the top of the fixed frame (210), connecting plates (207) are embedded in the connecting grooves (206), and the tops of the connecting plates (207) are respectively and fixedly connected with four sides of the bottom of the pressing frame (201);
the connecting screw hole (208) is respectively arranged at the side centers of the connecting groove (206) and the connecting plate (207), and a connecting screw (209) is embedded in the connecting screw hole (208).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110873508.2A CN113740166B (en) | 2021-07-30 | 2021-07-30 | Accurate test and automatic recording device of cylinder cap CID pressure blasting |
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| CN202110873508.2A CN113740166B (en) | 2021-07-30 | 2021-07-30 | Accurate test and automatic recording device of cylinder cap CID pressure blasting |
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| CN113740166B true CN113740166B (en) | 2024-05-28 |
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| CN113740166A (en) | 2021-12-03 |
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