CN113295532A - Pressure test device and multi-station pressure test machine - Google Patents
Pressure test device and multi-station pressure test machine Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 159
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- 238000003825 pressing Methods 0.000 claims abstract description 42
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- 230000008569 process Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
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- 239000002699 waste material Substances 0.000 description 2
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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
- 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
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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
- G01N2203/003—Generation of the force
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- G01N2203/0048—Hydraulic means
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Abstract
The invention discloses a pressure test device and a multi-station pressure test machine, which solve the problems of low efficiency, poor precision, high cost and the like of single-person single-machine manual operation in the existing concrete pressure test process, can be used for batch detection operation of concrete pressure tests, and has the specific scheme that: the device comprises a base, wherein a hydraulic cylinder is arranged on the base, a lower pressing plate is arranged at the top of the hydraulic cylinder, an upper pressing plate is matched with the lower pressing plate, the upper pressing plate and the lower pressing plate are matched to perform a pressure test on a test piece, and the upper part of the upper pressing plate is connected with a pre-tightening motor through a lead screw; the pressure test device also comprises a cleaning and wiping mechanism, the wiping mechanism comprises a force application motor and a push plate in driving connection with the force application motor, and the push plate moves to push the test piece down from the lower pressing plate. The multi-station pressure testing machine provided by the invention creates a unique integrated structure design of three pressure testing devices, improves the working efficiency and saves the space and occupied area.
Description
Technical Field
The invention relates to the technical field of concrete pressure tests, in particular to a pressure test device.
Background
Concrete pressure detection, especially laboratory concrete pressure detection, mostly still stays in a manual detection state. One person has one machine, manual lofting is carried out, test piece information is manually input, manual pressurization and manual detection are carried out, and the inspected test piece needs to be manually cleaned after the detection is finished. The manual work occupies an absolute position in the whole detection process, the action is slow, the operation is not safe, and especially, the manual entry of basic information wastes time and labor and is easy to cause errors. The tested test piece is required to be transferred to a sample retention area for storage after detection, the transfer sample retention not only consumes a large amount of physical power, but also is not easy to put in order, and the sample retention is required to be moved up and down during expiration treatment, so that the waste of the sample retention is avoided.
Disclosure of Invention
In order to solve the technical problems, the invention provides a pressure test device and a multi-station pressure test machine, which solve the problems of low efficiency, poor precision, high cost and the like of single-person single-machine manual operation in the existing concrete pressure test process, and can be used for batch detection operation of concrete pressure tests.
The technical purpose of the invention is realized by the following technical scheme:
a pressure test device comprises a base, wherein a hydraulic cylinder is arranged on the base, a lower pressing plate is arranged at the top of the hydraulic cylinder, an upper pressing plate is matched with the lower pressing plate, the upper pressing plate and the lower pressing plate are matched to carry out pressure test on a test piece, and the upper part of the upper pressing plate is connected with a pre-tightening motor through a lead screw; the pressure test device also comprises a cleaning and wiping mechanism, the wiping mechanism comprises a force application motor and a push plate in driving connection with the force application motor, and the push plate moves to push the test piece down from the lower pressing plate.
In the scheme, a test piece is placed between an upper pressing plate and a lower pressing plate, then the position of a lead screw in the vertical direction is adjusted through a pre-tightening motor, after the test piece is tightly pressed, the lower pressing plate is controlled through a hydraulic cylinder to carry out test piece testing until a final result is measured; after the test of a test piece is finished, the wiping mechanism drives the push plate through the force application motor to push down the test piece, and then the test of the next test piece is carried out.
As a preferred scheme, the bottom of the push plate is provided with a soft brush, and in the process of pushing the test piece by the push plate, the soft brush is in contact with the lower pressing plate and is used for wiping the test piece in a full-coverage mode from one end of the upper surface of the lower pressing plate to the other end of the upper surface of the lower pressing plate.
In the preferred scheme, in the test piece testing process, the test piece deforms and cracks or even is damaged, so that after the test of one test piece is finished, the fragments of the test piece are wiped from the lower pressing plate through the soft brush, and the damage of scratches and the like of the subsequent test piece to be tested caused by the residual fragments of the test piece is avoided; in different schemes, a layer can be additionally arranged on the top of the push plate by the soft brush for wiping the upper pressing plate.
As a preferred scheme, the force application motor is connected with a pneumatic push rod, the pneumatic push rod is connected with the push plate, and the process that the push plate pushes the test piece is realized through the movement of the pneumatic push rod.
In above-mentioned preferred scheme, application of force motor accessible actuating arm is connected with pneumatic push pedal, and the actuating arm position can be equipped with a branch pole and be used for fixing, and when using pneumatic push pedal, pneumatic push rod acts on the push pedal, realizes the horizontal migration of push pedal, including the action that promotes the test piece and clean the holding down plate.
Preferably, the surface of the screw is provided with a speed reducing mechanism in contact with the surface of the screw.
In the above preferred embodiment, since the reduction ratio of the general motor is not high, when the pre-tightening motor is used to control the screw to move up and down, the screw cannot be accurately controlled, and therefore, the reduction mechanism is additionally provided, the overall reduction ratio of the screw can be increased, and the operation of the screw can be accurately controlled.
Preferably, the speed reducing mechanism is a belt speed reducing mechanism.
In the above preferred embodiment, the belt speed reducing mechanism can play a good role in protection, and in a different embodiment, a gear speed reducing mechanism can be used instead of the belt speed reducing mechanism.
As a preferred scheme, the pressure test device further comprises a hydraulic unit, a control unit and a positioning mechanism, the hydraulic unit is matched with the hydraulic cylinder, the control unit is respectively in signal connection with the hydraulic unit, the pre-tightening motor and the force application motor, and the positioning mechanism is used for positioning and detecting a test piece placed between the upper pressing plate and the lower pressing plate.
In the above preferred embodiment, the hydraulic unit is configured to support the hydraulic cylinder to move upward, and apply a force to the test piece, so as to obtain a pressure test curve of the test piece; the control unit respectively controls the pre-tightening motor, the force application motor and the hydraulic unit to realize mechanical operation.
As a preferred scheme, the hydraulic unit comprises an oil tank, an oil pump, a one-way valve, a booster valve, an oil filter, a differential pressure valve, a three-position four-way servo valve, a three-position four-way reversing valve and a quick pressure relief valve which are sequentially arranged, and the hydraulic cylinder is respectively connected with the three-position four-way reversing valve quick pressure relief valve.
As an optimal scheme, the pressure test device further comprises a top plate, the top plate is connected with the base through a plurality of stand columns and stand column nuts, screw holes are formed in the top plate, the screw rods are rotated to penetrate through the screw holes, the speed reducing mechanism is placed on the top plate, and the pre-tightening motor is rotationally connected with the screw rods through the motor supporting plate.
The utility model provides a multistation compression testing machine, based on foretell compression testing machine, including a base, one set of hydraulic unit and one set of control unit, even interval sets up two at least compression testing devices on the base, the hydraulic unit is all connected to compression testing device's all pneumatic cylinders, one set of hydraulic unit includes the hydraulic drive subassembly with compression testing device quantity matching, hydraulic drive subassembly includes the check valve, the pressure boost valve, the oil filter, the differential pressure valve, tribit four-way servo valve, tribit four-way reversing valve, quick relief valve and pneumatic cylinder, the hydraulic unit still includes oil tank and the oil pump that all hydraulic drive subassemblies used jointly, all pretension motors and the equal signal connection control unit of application of force motor of compression testing device, control unit and hydraulic unit signal connection.
As a preferred scheme, in the pressure test device, a force application motor is connected with a pneumatic push rod through a driving arm, the pneumatic push rod is connected with a push plate through a push plate connecting rod, the force application motor realizes the horizontal movement of the push plate through the pneumatic push rod, and the force application motor realizes the rotation of the push plate by taking the driving arm as a shaft through the pneumatic push rod and the push plate connecting rod.
In conclusion, the invention has the following beneficial effects:
1. the multi-station pressure testing machine provided by the invention creates a unique integrated structural design of at least two pressure testing devices, improves the working efficiency and saves the space and occupied area.
2. The multi-station pressure testing machine provided by the invention has the advantages that an independent set of oil source system is innovated to supply at least two pressure testing devices to work simultaneously, the safe, stable and efficient work of the system is ensured, the configuration resources and the cost of a hydraulic system are saved, and the reliability and the stability of the work of the system are improved.
3. The multi-station pressure testing machine provided by the invention is provided with the automatic positioning and cleaning mechanism, so that the test piece can be smoothly and accurately placed and quickly cleaned before and after the test piece is subjected to pressure test, and the accuracy and the high efficiency of system test are guaranteed.
4. The multi-station compression testing machine provided by the invention develops the operation control module in system software, and the operation control module is organically combined, mutually supported and cooperatively operated with a software program solidified in a PLC (programmable logic controller), so that the integral action rhythm of the system is stable and smooth.
5. The multi-station pressure testing machine provided by the invention has the advantages that the extensibility and the software program control are realized, the assembly line type operation of the three-station pressure testing machine is realized, the speed is high, and the efficiency is high.
Drawings
FIG. 1 is a schematic structural diagram of a multi-station compression testing machine in an embodiment of the invention;
FIG. 2 is a schematic structural view of a cleaning wiping mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a hydraulic system of an embodiment of the present invention;
reference numerals:
1. a lead screw; 2. an upper pressure plate; 3. a lower pressing plate; 4. a hydraulic cylinder; 5. cleaning the wiping mechanism; 6. a column; 7. pre-tightening the motor; 8. a motor supporting plate; 9. a top plate; 10. a rear left column nut; 11. a speed reduction mechanism; 12. a rear right column nut; 13. a base; 14. a test piece; 501. soft brushing; 502. a force application motor; 503. a drive arm; 504. a strut; 505. a pneumatic push rod; 506. a push plate connecting rod; 507. pushing the plate; 21. an oil tank; 22. an oil pump; 23. a one-way valve; 24. a pressure increasing valve; 25. an oil filter; 26. a differential pressure valve; 27. a three-position four-way servo valve; 28. a three-position four-way reversing valve; 29. a quick pressure relief valve.
Detailed Description
This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
The terms in upper, lower, left, right and the like in the description and the claims are combined with the drawings to facilitate further explanation, so that the application is more convenient to understand and is not limited to the application.
The present invention will be described in further detail with reference to the accompanying drawings.
A pressure test device comprises a base 13, wherein a hydraulic cylinder 4 is arranged on the base 13, a lower pressing plate 3 is arranged at the top of the hydraulic cylinder 4, an upper pressing plate 2 is arranged in a matching manner with the lower pressing plate 3, the upper pressing plate 2 and the lower pressing plate 3 are matched to carry out a pressure test on a test piece 14, and the upper part of the upper pressing plate 2 is connected with a pre-tightening motor 7 through a lead screw 1; the pressure test device further comprises a cleaning and wiping mechanism 5, the wiping mechanism comprises a force application motor 502 and a push plate 507 in driving connection with the force application motor 502, and the push plate 507 moves to push the test piece 14 down from the lower pressing plate 3.
In the embodiment, the test piece 14 is placed between the upper pressing plate 2 and the lower pressing plate 3, then the position of the screw rod 1 in the vertical direction is adjusted through the pre-tightening motor 7, and after the test piece 14 is tightly pressed, the lower pressing plate 3 is controlled through the hydraulic cylinder 4 to test the test piece 14 until the final result is measured; after the test of one test piece 14 is finished, the wiping mechanism drives the push plate 507 through the force application motor 502 to push down the test piece 14, and then the test of the next test piece 14 is carried out.
As a preferred embodiment, the bottom of the push plate 507 is provided with a soft brush 501, and during the process of pushing the test piece 14 by the push plate 507, the soft brush 501 contacts the lower press plate 3 and is wiped along the upper surface of the lower press plate 3 from one end to the other end in a full coverage manner.
In the above preferred embodiment, in the test process of the test piece 14, the test piece 14 deforms, and cracks or even damages can occur, so after the test of one test piece 14 is finished, fragments of the test piece 14 are wiped from the lower press plate 3 by the soft brush 501, and damage such as scratching and the like to the subsequent test piece 14 to be tested caused by the remaining fragments of the test piece 14 is avoided; in different embodiments, the soft brush 501 may also be provided with a layer on top of the push plate 507 for wiping the upper press plate 2.
As a preferred embodiment, the force application motor 502 is connected with a pneumatic push rod 505, the pneumatic push rod 505 is connected with a push plate 507, and the process of pushing the test piece 14 by the push plate 507 is realized through the movement of the pneumatic push rod 505.
In the above preferred embodiment, the force applying motor 502 can be connected to the pneumatic push plate 505 by the driving arm 503, the driving arm 503 can be provided with a support rod 504 for fixing, when the pneumatic push plate 507 is used, the pneumatic push rod 505 acts on the push plate 507 to realize the horizontal movement of the push plate 507, including the actions of pushing the test piece 14 and wiping the lower press plate 3.
As a preferred embodiment, the screw 1 is provided with a reduction mechanism 11 in surface contact.
In the preferred embodiment, since the reduction ratio of the general motor is not high, when the pretensioning motor 7 is used to control the vertical movement of the screw 1, the screw 1 cannot be precisely controlled, and therefore, the reduction mechanism 11 is additionally provided, so that the overall reduction ratio of the screw 1 can be increased, and the operation of the screw 1 can be precisely controlled.
As a preferred embodiment, the speed reduction mechanism 11 is a belt speed reduction mechanism 11.
In the preferred embodiment described above, the belt speed reducing mechanism 11 is well protected, and in a different embodiment, the gear speed reducing mechanism 11 may be used instead of the belt speed reducing mechanism 11.
As a preferred embodiment, the pressure test apparatus further includes a hydraulic unit, a control unit and a positioning mechanism, the hydraulic unit is matched with the hydraulic cylinder 4, the control unit is respectively in signal connection with the hydraulic unit, the pre-tightening motor 7 and the force application motor 502, and the positioning mechanism is used for positioning and detecting the position of the test piece 14 between the upper press plate 2 and the lower press plate 3.
In the above preferred embodiment, the hydraulic unit is used to support the hydraulic cylinder 4 to move upward, and apply force to the test piece 14, so as to finally obtain a pressure test curve of the test piece 14; the control unit respectively controls the pre-tightening motor 7, the force application motor 502 and the hydraulic unit to realize mechanical operation.
As a preferred embodiment, the hydraulic unit includes an oil tank 21, an oil pump 22, a check valve 23, a pressure increasing valve 24, an oil filter 25, a differential pressure valve 26, a three-position four-way servo valve 27, a three-position four-way selector valve 28, and a quick relief valve 29, which are arranged in this order, and the hydraulic cylinder 4 is connected to the three-position four-way selector valve 28 and the quick relief valve 29, respectively.
As a preferred embodiment, the pressure test device further comprises a top plate 9, the top plate 9 is connected with a base 13 through a plurality of stand columns 6 and stand column nuts 12, screw holes are formed in the top plate 9 and used for the lead screw 1 to rotate to penetrate through, a speed reducing mechanism 11 is placed on the top plate 9, and a pre-tightening motor 7 is rotatably connected with the lead screw 1 through a motor supporting plate 8.
The utility model provides a multistation compression testing machine, based on foretell compression testing machine, including a base 13, a set of hydraulic unit and a set of control unit, even interval sets up two at least compression testing devices on the base 13, hydraulic unit is all connected to all pneumatic cylinders 4 of compression testing device, a set of hydraulic unit includes the hydraulic drive subassembly with compression testing device quantity matching, hydraulic drive subassembly includes check valve 23, pressure-increasing valve 24, oil filter 25, differential pressure valve 26, three-position four-way servo valve 27, three-position four-way reversing valve 28, quick relief valve 29 and pneumatic cylinder 4, hydraulic unit still includes oil tank 21 and oil pump 22 that all hydraulic drive subassemblies share, all pretension motor 7 and the equal signal connection control unit of force application motor 502 of compression testing device, the control unit and hydraulic unit signal connection.
In a preferred embodiment, in the pressure testing apparatus, the force application motor 502 is connected to the pneumatic push rod 505 through the driving arm 503, the pneumatic push rod 505 is connected to the push plate 507 through the push plate 507 connecting rod 506, the force application motor 502 realizes the horizontal movement of the push plate 507 through the pneumatic push rod 505, and the force application motor 502 realizes the rotation of the push plate 507 around the driving arm 503 as the axis through the pneumatic push rod 505 and the push plate 507 connecting rod 506.
Take the multistation compression testing machine that three compression testing device constitutes as an example, specifically set up including following content:
the hardware system consists of a three-station pressure tester and related auxiliary equipment thereof. The hardware system comprises: mechanical units, hydraulic units, electrical units, information scanning equipment, and auxiliary components necessary to accomplish the pressure testing task.
The mechanical unit comprises a base 13, three pressure test devices, three sets of tested sample 14 cleaning mechanisms, three sets of wiping mechanisms and three sets of positioning devices.
The electric unit is an electric control system used for completing a pressure test, and comprises a power supply control cabinet, a circuit breaker, a proximity switch, a lead screw 1 pre-tightening motor 7, a system fault alarm device, a connecting circuit and the like.
The information scanning unit is a code scanning gun arranged on the side surface of the upright post of each station.
The auxiliary components comprise safety protection baffles, foot embedded parts and the like.
The measurement and control software is a set of measurement and control system capable of independently completing three-station pressure tests.
The working principle is as follows: the front-end feeding and distributing mechanism distributes the test piece 14 to the position of the wiped lower pressing plate 3 of the pressure test device according to the requirement of each station, the positioning mechanism positions the test piece to the middle position, after the positioning is finished, the positioning mechanism sends an instruction to the software control system, the software control system sends a code scanning instruction to the code scanning gun after receiving the instruction, the code scanning gun scans the two-dimensional code of the test piece 14, the information result read by the code scanning is transmitted to the software control system, and the automatic recording of the basic information of the test piece 14 is completed. And after the input is finished, the software control system compares the current code scanning information with the system input information, if the comparison result is correct, an action instruction is sent to the pressure test device, a proper pressurization rate is automatically selected, and the pressurization test is started. And the system automatically draws a pressure curve chart in the pressurizing process, records the peak value of the current test piece 14, calculates the detection results of a group of test pieces 14 according to the corresponding standard requirements as the final evaluation results, and simultaneously generates a corresponding report. And after pressurization is finished, the software system sends out a pressure relief instruction, and the testing machine quickly relieves pressure. And then the motor 7 is pre-tightened to act, the screw rod 1 drives the upper pressure plate 2 to move upwards, the cleaning and wiping mechanism 5 acts to clean the tested test piece 14 to the next action flow, and meanwhile, the lower pressure plate 3 is wiped. At this point, the pressure test movement cycle of one test piece 14 is completed.
The test action of the remaining pressure test apparatus and the next test piece 14 is repeated.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A pressure test device is characterized by comprising a base (13), wherein a hydraulic cylinder (4) is arranged on the base (13), a lower pressing plate (3) is arranged at the top of the hydraulic cylinder (4), an upper pressing plate (2) is arranged in a matching manner with the lower pressing plate (3), the upper pressing plate (2) and the lower pressing plate (3) are matched to carry out a pressure test on a test piece (14), and the upper part of the upper pressing plate (2) is connected with a pre-tightening motor (7) through a lead screw (1); the pressure test device also comprises a cleaning and wiping mechanism (5), the wiping mechanism comprises a force application motor (502) and a push plate (507) in driving connection with the force application motor (502), and the push plate (507) moves to push the test piece (14) down from the lower press plate (3).
2. The pressure test device according to claim 1, characterized in that a soft brush (501) is arranged at the bottom of the push plate (507), and during the process that the push plate (507) pushes the test piece (14), the soft brush (501) contacts the lower press plate (3) and is wiped in a full-coverage manner from one end to the other end of the upper surface of the lower press plate (3).
3. The pressure test device according to claim 2, wherein the force application motor (502) is connected with a pneumatic push rod (505), the pneumatic push rod (505) is connected with the push plate (507), and the process that the push plate (507) pushes the test piece (14) is realized through the movement of the pneumatic push rod (505).
4. Pressure tester according to claim 1, characterized in that the screw (1) is provided with a reduction mechanism (11) in surface contact.
5. Pressure test device according to claim 4, characterized in that the speed reduction mechanism (11) is a belt speed reduction mechanism (11).
6. The pressure test device according to any one of claims 1 to 5, characterized in that the pressure test device further comprises a hydraulic unit, a control unit and a positioning mechanism, wherein the hydraulic unit is matched with the hydraulic cylinder (4), the control unit is respectively in signal connection with the hydraulic unit, the pre-tightening motor (7) and the force application motor (502), and the positioning mechanism is used for positioning detection of a position of the test piece (14) between the upper pressure plate (2) and the lower pressure plate (3).
7. The pressure test device according to claim 6, wherein the hydraulic unit comprises an oil tank (21), an oil pump (22), a one-way valve (23), a booster valve (24), an oil filter (25), a differential pressure valve (26), a three-position four-way servo valve (27), a three-position four-way reversing valve (28) and a quick pressure relief valve (29) which are arranged in sequence, and the hydraulic cylinder (4) is connected with the three-position four-way reversing valve (28) and the quick pressure relief valve (29) respectively.
8. The pressure test device of claim 7, further comprising a top plate (9), wherein the top plate (9) is connected with the base (13) through a plurality of columns (6) and column nuts (12), screw holes are formed in the top plate (9) and used for the lead screw (1) to rotate and penetrate through, the speed reducing mechanism (11) is placed on the top plate (9), and the pre-tightening motor (7) is rotatably connected with the lead screw (1) through a motor supporting plate (8).
9. A multi-station pressure testing machine is based on the pressure testing device of any one of claims 1 to 8 and is characterized by comprising a base (13), a set of hydraulic unit and a set of control unit, wherein at least two pressure testing devices are uniformly arranged on the base (13) at intervals, all hydraulic cylinders (4) of the pressure testing devices are connected with the hydraulic unit, one set of hydraulic unit comprises hydraulic driving components matched with the pressure testing devices in number, each hydraulic driving component comprises a one-way valve (23), a booster valve (24), an oil filter (25), a differential pressure valve (26), a three-position four-way servo valve (27), a three-position four-way reversing valve (28), a quick pressure relief valve (29) and a hydraulic cylinder (4), the hydraulic unit further comprises an oil tank (21) and an oil pump (22) shared by all hydraulic driving components, and all pre-tightening motors (7) and force application motors (502) of the pressure testing devices are in signal connection with the control unit, the control unit is in signal connection with the hydraulic unit.
10. The multi-station compression testing machine according to claim 9, wherein in the compression testing device, the force application motor (502) is connected with the pneumatic push rod (505) through the driving arm (503), the pneumatic push rod (505) is connected with the push plate (507) through the push plate (507) connecting rod (506), the force application motor (502) realizes the horizontal movement of the push plate (507) through the pneumatic push rod (505), and the force application motor (502) realizes the rotation of the push plate (507) with the driving arm (503) as the shaft through the pneumatic push rod (505) and the push plate (507) connecting rod (506).
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| CN202110440455.5A CN113295532A (en) | 2021-04-23 | 2021-04-23 | Pressure test device and multi-station pressure test machine |
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| CN202110440455.5A CN113295532A (en) | 2021-04-23 | 2021-04-23 | Pressure test device and multi-station pressure test machine |
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