CN111562187A - Pressure alternation execution system and integrated pressure alternation testing machine - Google Patents
Pressure alternation execution system and integrated pressure alternation testing machine Download PDFInfo
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- CN111562187A CN111562187A CN202010523538.6A CN202010523538A CN111562187A CN 111562187 A CN111562187 A CN 111562187A CN 202010523538 A CN202010523538 A CN 202010523538A CN 111562187 A CN111562187 A CN 111562187A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- 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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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Abstract
The invention discloses a pressure alternation execution system, which comprises a test element channel, and an air inlet channel and a liquid inlet channel which are positioned between the test element channel and an air source, wherein an electric proportional valve and an air-liquid supercharger are sequentially arranged on the air inlet channel along the air flowing direction, and a connecting valve and a prepressing tank for storing liquid are sequentially arranged on the liquid inlet channel along the air flowing direction; the gas-liquid supercharger is provided with a prepressing port communicated with the prepressing tank, and the connecting valve is connected with a ventilation source and used for pressing liquid into the channel of the testing element through the prepressing port; the electric proportional valve is communicated with a gas source and performs pressure alternation of gas pressure on the gas-liquid supercharger, the gas-liquid supercharger can amplify the gas pressure in equal proportion, and then the gas-liquid supercharger performs hydraulic pressure alternation on a test element channel so as to meet the pressure alternation test of a large-pressure section.
Description
Technical Field
The invention belongs to the technical field of pressure alternation, and particularly relates to a pressure alternation execution system and an integrated pressure alternation tester.
Background
The pressure alternating equipment in the prior art only has a set of pressure control system, so that only one measuring range can be alternated at one time, the air pressure alternating tester in the prior art, such as the invention patent with the application number of 201710779867.5 and named as a negative pressure alternating test method and device, has the air path principle as shown in figure 1, and is sequentially communicated with a pressure regulating valve 1, an air inlet electromagnetic valve 2, a test element channel 3 and an exhaust electromagnetic valve 4 along the air inlet direction of an air source, the air source forms a stable pressure value after passing through the pressure regulating valve, then the air inlet electromagnetic valve opens the exhaust electromagnetic valve to close the channel to fill the pressure, and finally the air inlet electromagnetic valve closes the exhaust electromagnetic valve to open the channel to release the pressure in the channel to zero, so that the pressure alternating of one period is formed; the circuit principle is as follows, after the start button is switched on, the air inlet electromagnetic valve 2 is powered on, the time relay is switched on to start timing, the time relay normally closed contact is switched off and the normally open contact is switched on when the time is set, so that the air inlet electromagnetic valve 2 is powered off, the air outlet electromagnetic valve 4 is powered on, however, the electromagnetic valve is controlled to be switched on and off by the time relay to realize pressure alternation, manual adjustment is needed for pressure adjustment, the use is complicated inevitably caused, and the long-term working life of the electromagnetic valve is;
in addition, the pressure alternating tester in the prior art can only change a pressure gauge with one specification by changing precise pressure regulating valves with different ranges for the conversion of different pressure alternations, cannot avoid the influence of the initial pressure of a gas source, cannot effectively increase the pressure value in the pressure alternating process, and causes the universality of the pressure alternating tester to be poor.
Disclosure of Invention
The invention aims to provide a pressure alternation execution system and an integrated pressure alternation tester, which can convert air pressure alternation into hydraulic pressure alternation, can stably and effectively increase the range of pressure alternation, have high adjustment precision, long service life and low noise through an electric proportional valve, and simultaneously carry out different alternation experiments by comprising a plurality of sets of pressure control systems with different pressure sections in the integrated pressure alternation tester, thereby reducing the use cost and improving the use efficiency of equipment.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a pressure alternation execution system, which comprises a test element channel, and an air inlet channel and a liquid inlet channel which are positioned between the test element channel and an air source, wherein an electric proportional valve and an air-liquid supercharger are sequentially arranged on the air inlet channel along the air flowing direction, and a connecting valve and a prepressing tank for storing liquid are sequentially arranged on the liquid inlet channel along the air flowing direction;
the gas-liquid supercharger is provided with a prepressing port communicated with the prepressing tank, and the connecting valve is communicated with the gas source and is used for pressing the liquid into the test element channel through the prepressing port; the electric proportional valve is communicated with the gas source and performs pressure alternation of gas pressure on the gas-liquid supercharger and is used for driving the gas-liquid supercharger to perform hydraulic pressure alternation on the test element channel.
Preferably, the connecting valve is a pressure regulating valve for controlling an initial pressure of the liquid into the test element passage.
Preferably, a throttle valve is provided on the intake passage between the electric proportional valve and the gas-liquid supercharger.
Preferably, the pressure regulating valve is arranged on the liquid inlet channel and located between the pressure regulating valve and the pre-pressing tank, the three-position five-way electromagnetic valve can be used for communicating the pressure regulating valve with the pre-pressing tank or communicating the pressure regulating valve with the gas-liquid supercharger, and when the pressure regulating valve is communicated with the gas-liquid supercharger, the pressure regulating valve is used for relieving pressure of the gas-liquid supercharger.
Preferably, the pre-pressing tank is provided with a vent hole and a liquid through hole which are respectively communicated with the three-position five-way electromagnetic valve and the gas-liquid supercharger, the vent hole is positioned above the liquid level of the liquid, and the liquid through hole is positioned below the liquid level of the liquid.
Preferably, a pressure sensor is provided on the test element channel for monitoring the pressure inside the test element channel.
Preferably, the pressure sensor comprises an alarm system connected with the pressure sensor, the alarm system is used for judging the leakage condition according to the numerical value monitored by the pressure sensor, and when the leakage condition occurs, the alarm system gives an alarm and controls the channel of the test element to release pressure.
Preferably, an integrated pressure alternation testing machine is provided, which comprises a plurality of pressure alternation execution systems according to any one of claims 1 to 7 and a plurality of auxiliary pressure alternation execution systems arranged in parallel with the pressure alternation execution systems, wherein each auxiliary pressure alternation execution system comprises an auxiliary electric proportional valve and an auxiliary testing element channel which are communicated, and the auxiliary electric proportional valve is communicated with the air source and is used for directly carrying out pressure alternation on the auxiliary testing element channel.
Preferably, the secondary pressure alternation enforcement system comprises a secondary throttle valve for communicating the secondary electric proportional valve and the secondary test element channel.
Preferably, the sub electric proportional valve in each sub pressure alternation execution system has a different range, and the pressure regulating valve in each pressure alternation execution system has a different opening degree.
Compared with the prior art, the invention has the following technical effects:
1. according to the invention, by additionally arranging the pressurizing elements such as the gas-liquid pressurizer, the electric proportional valve can output a specified air pressure after being connected with the air source, the air pressure drives the gas-liquid pressurizer to perform proportional amplification according to the pressurizing proportion of the gas-liquid pressurizer and act on liquid in the test element channel, so that the electric proportional valve is connected with the air source and applies air pressure alternation to the gas-liquid pressurizer, and the gas-liquid pressurizer is further driven to perform stable and effective hydraulic pressure alternation on the test element channel, thereby realizing the pressure alternation test of a large-pressure section, and ensuring that the whole device is not limited by the regulation between the air inlet electromagnetic valve and the air outlet electromagnetic valve.
2. The electric proportional valve is adopted to replace the original electromagnetic valve, has the characteristics of high precision, long service life and low noise, and solves the problem of unstable equipment use caused by short service life of the electromagnetic valve in the prior art.
3. The integrated pressure alternation tester comprises a plurality of pressure alternation execution systems, can perform alternation experiments of a plurality of different pressure sections at the same time, and solves the problem that one original device cannot fatigue test elements of a plurality of specifications at the same time.
4. According to the invention, the pressure sensor is adopted to monitor the internal pressure of the channel of the test element, the alarm system is used to judge the leakage condition according to the value monitored by the pressure sensor, and when the leakage condition occurs, the alarm system gives an alarm and controls the channel of the test element to release pressure, so that the problem of inaccurate pressure alternation test caused by leakage and the like is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a prior art pressure swing apparatus;
FIG. 2 is a schematic diagram of a pressure swing actuator system of the present application;
FIG. 3 is a schematic view of the integrated pressure alternating tester of the present application;
FIG. 4 is a flow chart of the operation of the integrated pressure alternating tester;
FIG. 5 is a schematic diagram of the operation of the secondary pressure swing actuator system;
fig. 6 is a working principle diagram of the pressure alternation execution system.
The system comprises a pressure regulating valve 1, an air inlet electromagnetic valve 2, a test element channel 3, an exhaust electromagnetic valve 4, an air source 5, an electric proportional valve 6, a throttle valve 7, a three-position five-way electromagnetic valve 8, a prepressing tank 9, a gas-liquid supercharger 10, an auxiliary electric proportional valve 11, an auxiliary throttle valve 12 and an auxiliary test element channel 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a pressure alternation execution system and an integrated pressure alternation tester, which can convert air pressure alternation into hydraulic pressure alternation, can stably and effectively increase the range of pressure alternation, have high adjustment precision, long service life and low noise through an electric proportional valve, and simultaneously carry out different alternation experiments by comprising a plurality of sets of pressure control systems with different pressure sections in the integrated pressure alternation tester, thereby reducing the use cost and improving the use efficiency of equipment.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 2, the embodiment provides a pressure alternation execution system, which includes a test element channel, and an air inlet channel and a liquid inlet channel located between the test element channel and an air source 5, wherein an electric proportional valve 6 and an air-liquid supercharger 10 are sequentially arranged on the air inlet channel along an air flowing direction, a connecting valve and a pre-pressing tank 9 storing liquid are sequentially arranged on the liquid inlet channel along the air flowing direction, and preferably, in order to reduce the use cost, the liquid in the pre-pressing tank 9 is water; the gas-liquid supercharger 10 is provided with a prepressing port communicated with the prepressing tank 9, and the connecting valve is communicated with the gas source 5 and is used for pressing liquid into a channel of the test element through the prepressing port; the electric proportional valve 6 is connected with the gas source 5 and then can output a specified gas pressure, the gas pressure drives the gas-liquid supercharger 10 to carry out proportional amplification according to the supercharging proportion of the gas-liquid supercharger 10, namely, the electric proportional valve 6 is connected with the gas source 5 and carries out pressure alternation of the gas pressure on the gas-liquid supercharger 10, and then the gas-liquid supercharger 10 is driven to carry out hydraulic pressure alternation on a test element channel; as a preferred embodiment of the present invention, the connecting valve is a pressure regulating valve 1, and to ensure accurate regulation, for example, a precision pressure regulating valve is used, the pressure regulating valve 1 is used to control the initial pressure of the liquid entering the test element channel, so that different pressures are generated in the test element channel when pressure alternation is performed in the test element channel, and the measurement ranges of the pressure alternation of the hydraulic pressure in the test element channel can be different when pressure alternation is performed subsequently by using the electric proportional valve 6, thereby increasing the universality of the whole pressure alternation execution system.
As a preferred embodiment of the present invention, as shown in fig. 2, the present invention includes a throttle valve 7 disposed in the intake passage and between the electric proportional valve 6 and the gas-liquid supercharger 10, wherein the electric proportional valve 6 is connected to the gas source 5 and performs pressure alternation of the gas pressure of the gas-liquid supercharger 10, that is, the gas source 5 is subjected to an equal proportional adjustment to change the gas pressure value inside the passage, and at this time, the electric proportional valve 6 is subjected to a drive of the gas-liquid supercharger 10 by its own structure and is adjusted in an equal proportional manner to form a step, and after the throttle valve 7 is disposed, when the throttle valve 7 performs a step-type adjustment of the gas pressure in the passage by the electric proportional valve 6, the gas pressure value generated by the electric proportional valve 6 can be gradually adjusted to be changed in a linear manner and then applied to the gas-liquid supercharger 10, thereby effectively reducing.
Further, as a preferred embodiment of the present invention, as shown in fig. 2, in order to ensure that the air source 5 can both press the liquid in the pre-pressure tank 9 into the test element channel 3 and release the pressure of the gas-liquid supercharger 10, a three-position five-way solenoid valve 8 is disposed on the liquid inlet channel and between the pressure regulating valve 1 and the pre-pressure tank 9, generally, the three-position five-way solenoid valve 8 includes a plurality of inlets and outlets, different combinations of inlets and different outlets can be controlled by the action of the three-position five-way solenoid valve 8, so as to communicate the pressure regulating valve 1 with the pre-pressure tank 9 or communicate the pressure regulating valve 1 with the gas-liquid supercharger 10, when the pressure regulating valve 1 communicates with the pre-pressure tank 9, the air source 5 presses the liquid in the pre-pressure tank 9 into the test element channel 3 through the three-position five-way solenoid valve 8, and when the pressure regulating valve 1, and the piston rod can be retracted, thereby realizing the pressure relief of the gas-liquid supercharger 10. Preferably, in order to guarantee that the liquid in the pre-pressing tank 9 is well pushed, the pre-pressing tank 9 is provided with a vent hole and a liquid passing hole which are respectively communicated with the three-position five-way electromagnetic valve 8 and the gas-liquid supercharger 10, the vent hole is positioned above the liquid level of the liquid, and the liquid passing hole is positioned below the liquid level of the liquid, so that the gas source 5 can enter from the liquid level, and then the whole liquid is pushed to flow, and the liquid is guaranteed to flow into the testing element channel 3.
As a preferred embodiment of the present invention, in order to avoid the alternating test result of the leakage in the test element channel, a pressure sensor is arranged on the test element channel, the pressure sensor is used for monitoring the pressure in the test element channel, and the pressure sensor is connected with an alarm system, the alarm system comprises a wireless signal generating module arranged in the electronic device, a wireless signal receiving module, a processing module connected with the wireless signal receiving module, a driving circuit connected with the processing module, and an alarm device connected with the driving circuit, the wireless signal generating module wirelessly communicates with the wireless signal receiving module when the wireless signal generating module is within a communication distance with the wireless signal receiving module, the processing module sends a conducting signal to the driving circuit when the distance between the wireless signal receiving module and the wireless signal generating module exceeds the communication distance and cannot wirelessly communicate with the wireless signal generating module, the driving circuit receives the conduction signal and then drives the alarm device to alarm, the wireless signal generation module transmits the numerical value monitored by the pressure sensor to the wireless signal receiving module so as to judge the leakage condition through the processing module, and the alarm device alarms and controls the channel of the test element to release pressure when the leakage condition occurs.
Furthermore, as shown in fig. 3, an integrated pressure alternation tester is provided, which includes a plurality of pressure alternation execution systems and a plurality of sub-pressure alternation execution systems arranged in parallel with the pressure alternation execution systems, that is, the whole device includes a plurality of pressure alternation execution systems, and can perform alternation experiments of a plurality of different pressure sections at the same time, so as to solve the problem that one original device cannot fatigue test elements of a plurality of specifications at the same time. In order to ensure that the secondary pressure alternation execution system carries out linear pressure regulation on the test element, a secondary throttle valve 12 is also arranged in the secondary pressure alternation execution system, and the secondary throttle valve 12 is used for communicating the secondary electric proportional valve 11 with a secondary test element channel 13. In order to ensure that the sub-pressure alternating execution system can test different pressure sections of different test elements, the range of the sub-electric proportional valve 11 in each sub-pressure alternating execution system is different, and in order to ensure that the pressure alternating execution system tests different pressure sections of different test elements, the opening degree of the pressure regulating valve 1 in each pressure alternating execution system is different, so that the initial pressure of liquid entering a test element channel is different, and further the range of the pressure alternating quantity generated by the gas-liquid supercharger 10 to the test element channel is different in the driving of the subsequent electric proportional valve 6 to the gas-liquid supercharger 10.
The use process of the integrated pressure alternation tester is as follows:
for convenience of understanding, three alternating channels are provided, the first alternating channel and the second alternating channel are auxiliary pressure alternating execution systems, but the measuring ranges of the electric proportional valves 6 adopted by the first alternating channel and the second alternating channel are different, the third alternating channel is a pressure alternating execution system, and the working process is shown in fig. 4: the method comprises the steps of firstly, alternating channel selection (one or more optional channels can be selected), secondly, setting alternating frequency and alternating times under the selected channel, thirdly, clicking and starting under the selected channel, fourthly, setting the alternating times to automatically release pressure, and if a leakage condition exists in the midway, giving an alarm by a system and automatically releasing the pressure.
The first and second alternating channels are used as follows:
as shown in fig. 5, after the system is started, the controller calculates the pressure rise time and the pressure relief time according to the alternating frequency set by the user, then the controller controls the electric proportional valve 6 to rise pressure to the upper limit of the alternating pressure, when the pressure rise time is up, the controller controls the electric proportional valve 6 to relieve pressure to the lower limit of the alternating pressure, when the pressure relief time is up, the controller controls the electric proportional valve 6 to rise pressure to the upper limit of the alternating pressure. The action is repeated until the alternating times reach the set times, and the system automatically releases pressure and stops.
The third alternating channel is used as follows:
the principle is as shown in fig. 6, first the controller calculates the pressure rise time and the pressure release time from the set alternating frequency. After the system is started, in the first step, the three-position five-way electromagnetic valve 8 acts to retract the piston rod of the gas-liquid pressure cylinder to the bottom. And secondly, pre-pressing the interior of the channel to enable the interior of the channel to be filled with water, and thirdly, controlling the electric proportional valve 6 to output specified air pressure by the controller. Fourthly, the gas pressure drives the gas-liquid booster pump to start boosting to the upper limit of the alternating pressure. And fifthly, when the pressure rise time is up, the controller controls the electric proportional valve 6 to release pressure. And sixthly, driving a gas-liquid pressure cylinder to release pressure to the lower limit of the alternating pressure by gas pressure. And (5) repeating the third step to the sixth step until the pressure relief time is up, and automatically stopping the system to relieve the pressure after the alternating times reach the set times.
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 attributes 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.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A pressure alternation execution system is characterized by comprising a test element channel, and an air inlet channel and a liquid inlet channel which are positioned between the test element channel and an air source, wherein an electric proportional valve and an air-liquid supercharger are sequentially arranged on the air inlet channel along the air flowing direction, and a connecting valve and a prepressing tank for storing liquid are sequentially arranged on the liquid inlet channel along the air flowing direction;
the gas-liquid supercharger is provided with a prepressing port communicated with the prepressing tank, and the connecting valve is communicated with the gas source and is used for pressing the liquid into the test element channel through the prepressing port; the electric proportional valve is communicated with the gas source and performs pressure alternation of gas pressure on the gas-liquid supercharger and is used for driving the gas-liquid supercharger to perform hydraulic pressure alternation on the test element channel.
2. The system of claim 1, wherein the connecting valve is a pressure regulating valve for controlling an initial pressure of the liquid into the test element channel.
3. The system according to claim 2, comprising a throttle valve provided on the intake passage between the electric proportional valve and the gas-liquid supercharger.
4. The system according to claim 2 or 3, comprising a three-position five-way solenoid valve disposed on the liquid inlet channel and between the pressure regulating valve and the pre-pressure tank, wherein the three-position five-way solenoid valve is operable to communicate the pressure regulating valve with the pre-pressure tank or with the pressure regulating valve and the gas-liquid supercharger, and is configured to depressurize the gas-liquid supercharger when the pressure regulating valve communicates with the gas-liquid supercharger.
5. The pressure alternation execution system according to claim 4, wherein the pre-pressing tank is provided with a vent port and a liquid through port which are respectively communicated with the three-position five-way electromagnetic valve and the gas-liquid supercharger, the vent port is positioned above the liquid level of the liquid, and the liquid through port is positioned below the liquid level of the liquid.
6. Pressure alternation fulfillment system according to claim 2, characterized in that it comprises a pressure sensor arranged on said test element channel for monitoring the pressure inside said test element channel.
7. The system according to claim 6, characterized by comprising an alarm system connected with the pressure sensor, wherein the alarm system is used for judging a leakage condition according to the value monitored by the pressure sensor, and when the leakage condition occurs, the alarm system gives an alarm and controls the test element channel to release pressure.
8. An integrated pressure alternation tester, which is characterized by comprising a plurality of pressure alternation execution systems according to any one of claims 1 to 7 and a plurality of auxiliary pressure alternation execution systems arranged in parallel with the pressure alternation execution systems, wherein each auxiliary pressure alternation execution system comprises an auxiliary electric proportional valve and an auxiliary test element channel which are communicated, and the auxiliary electric proportional valve is communicated with the air source and is used for directly carrying out pressure alternation on the auxiliary test element channel.
9. The integrated pressure alternation tester of claim 8, wherein the secondary pressure alternation actuator system comprises a secondary throttle valve for communicating the secondary electric proportional valve and the secondary test element channel.
10. The integrated pressure alternation tester as claimed in claim 9, wherein the sub-electric proportional valves in the sub-pressure alternation execution systems have different ranges and the pressure regulating valves in the sub-pressure alternation execution systems have different opening degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010523538.6A CN111562187A (en) | 2020-06-10 | 2020-06-10 | Pressure alternation execution system and integrated pressure alternation testing machine |
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| CN202010523538.6A CN111562187A (en) | 2020-06-10 | 2020-06-10 | Pressure alternation execution system and integrated pressure alternation testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615878A (en) * | 2022-09-23 | 2023-01-17 | 浙江大学 | Automatic saturation device of high-range tensiometer and saturation manufacturing method |
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2020
- 2020-06-10 CN CN202010523538.6A patent/CN111562187A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615878A (en) * | 2022-09-23 | 2023-01-17 | 浙江大学 | Automatic saturation device of high-range tensiometer and saturation manufacturing method |
| CN115615878B (en) * | 2022-09-23 | 2024-01-23 | 浙江大学 | Automatic saturation device of high-range tensiometer and saturation manufacturing method |
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