CN110748531A - Device for testing liquid leakage amount - Google Patents
Device for testing liquid leakage amount Download PDFInfo
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- CN110748531A CN110748531A CN201910968564.7A CN201910968564A CN110748531A CN 110748531 A CN110748531 A CN 110748531A CN 201910968564 A CN201910968564 A CN 201910968564A CN 110748531 A CN110748531 A CN 110748531A
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- oil cylinder
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- grating ruler
- pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a device for testing liquid leakage, wherein an inner cavity of an oil cylinder is defined into a first cavity and a second cavity by an oil cylinder piston, piston rods are arranged at two ends of the piston, and the piston rods are respectively positioned in the first cavity and the second cavity; the casing of the grating ruler is fixed with the cylinder body of the oil cylinder, the measuring head of the grating ruler is electrically connected with the controller, and the measuring head of the grating ruler is connected with the end part of one piston rod through the sliding connection assembly; the two-position four-way electromagnetic valve is electrically connected with the controller, a first executive part interface of the two-position four-way electromagnetic valve is communicated with the first cavity, and a second executive part interface of the two-position four-way electromagnetic valve is simultaneously communicated with the second cavity and communicated with a tested element through a one-way valve; the pressure gauge is connected to the hydraulic system and electrically connected with the controller, and a pressure critical value is arranged in the controller. The invention discloses a device for testing the leakage amount of liquid, which not only can improve the testing precision of the leakage amount of the liquid in a product, but also has a larger measuring range, thereby improving the application range of the device.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a device for testing liquid leakage.
Background
In the prior art, the liquid leakage amount in a product is generally tested through a flowmeter, but the flowmeter has large fluctuation and poor stability, so that the testing precision of the liquid leakage amount is low, and the measuring range of the flowmeter is limited, so that the testing range is small.
Meanwhile, the existing flow meter depends on import, so that the supply period is long and the cost is high.
Disclosure of Invention
In view of the above, the present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a device for testing the liquid leakage amount is connected to a hydraulic system, and the hydraulic system is electrically connected with a controller; the method comprises the following steps:
the piston in the oil cylinder limits an inner cavity of the oil cylinder into a first cavity and a second cavity, piston rods are arranged at two ends of the piston, and the piston rods are respectively positioned in the first cavity and the second cavity;
the casing of the grating ruler is fixed with the cylinder body of the oil cylinder, the measuring head of the grating ruler is electrically connected with the controller, and the measuring head of the grating ruler is connected with the end part of one of the piston rods through a sliding connection assembly;
the two-position four-way electromagnetic valve is electrically connected with the controller; a first executive part interface of the two-position four-way electromagnetic valve is communicated with the first chamber, and a second executive part interface is simultaneously communicated with the second chamber and communicated with a tested element through a one-way valve;
the pressure gauge is connected to the hydraulic system and electrically connected with the controller, a pressure critical value is arranged in the controller, and the pressure critical value is the pressure critical value which is filled with pressure oil in the second cavity and the tested element.
According to the invention, the first executive part interface of the two-position four-way electromagnetic valve is communicated with the first cavity of the oil cylinder, the second executive part interface is simultaneously communicated with the second cavity of the oil cylinder and communicated with the tested element through the one-way valve, so that the two-position four-way electromagnetic valve is controlled to reverse under the control of the controller, pressure oil can selectively enter between the first cavity and the second cavity of the oil cylinder, and therefore, the pressure oil can enter from the oil injection port P of the two-position four-way electromagnetic valve firstly, and is respectively filled in the second cavity and the tested element through the one-way valve, and then the pressure meter detects the pressureAfter the force critical value, controlling a two-position four-way electromagnetic valve to change the direction, so that pressure oil enters a first cavity by changing the direction, if the tested element does not leak, keeping a piston of an oil cylinder still, and simultaneously, enabling the moving distance of a measuring head test of the grating ruler to be 0; if the tested element leaks, the piston of the oil cylinder moves towards the direction of the second cavity, the measuring head of the grating ruler moves together with the piston through the sliding connection assembly, and the moving distance of the measuring head of the grating ruler is the same as the moving distance h of the piston, so that the measured element passes through V-pi (R)2-r2) X h, calculating the leakage amount of the tested element, wherein V is the sum of the volumes of the first chamber and the second chamber and is the leakage amount of the tested element; r is the radius of the inner wall of the oil cylinder; r is the outer diameter of the piston rod; h is the moving distance of the piston and the moving distance of the measuring head of the grating ruler.
In summary, since the two-position four-way solenoid valve and the one-way valve are used to connect the measured element with the cylinder, the distance traveled by the piston of the cylinder is measured by the measuring head of the grating ruler, and then V ═ pi (R) is combined2-r2) And the measuring head of the grating ruler has a large measuring range because the measuring head of the grating ruler measures the displacement of the piston and the relation is established between the measuring head of the grating ruler and the piston rod of the oil cylinder through the sliding connection assembly.
Preferably, the hydraulic oil cylinder further comprises a tooling plate, and the cylinder body of the oil cylinder and the shell of the grating ruler are both fixed on the tooling plate.
Preferably, the slide connection assembly includes:
the sliding block is fixed on the cylinder body of the oil cylinder;
the track is connected with the sliding block in a sliding mode, one end of the track is fixed with one end of one of the piston rods through a connecting piece, meanwhile, the measuring head of the grating ruler is fixed on the track, and the measuring head of the grating ruler is close to one end, connected with the piston rod, of the track.
According to the invention, the slide block is fixed on the cylinder body of the oil cylinder, and the slide block is connected with the rail in a sliding manner, so that the measuring head of the grating ruler is fixed on the rail, and after the rail and the piston rod are fixed through the connecting piece, the effect of the joint movement of the measuring head of the grating ruler and the piston rod of the oil cylinder can be realized, and meanwhile, the measuring head of the grating ruler and the piston of the oil cylinder have the same movement distance.
Preferably, an inlet of the check valve is communicated with the second actuator interface of the two-position four-way solenoid valve, and an outlet of the check valve is respectively communicated with the second chamber and the element to be tested.
The invention ensures that the pressure oil can only flow to the second cavity of the oil cylinder and the element to be measured from the oil filling port P of the two-position four-way electromagnetic valve through the one-way valve, and avoids the backflow of the pressure oil, thereby ensuring that the measured leakage detection amount is the leakage detection amount of the element to be measured, and further improving the measurement precision of the invention.
Preferably, the first and second chambers have the same unit cross-sectional area, so that the radius of the inner wall of the first and second chambers is the same, and thus the radius of the inner wall is equal to pi (R) when passing V ═ pi (R)2-r2) When the leakage detection amount of the element to be detected is calculated by x h, only one variable h, namely the moving distance of the measuring head, is ensured, so that the leakage detection amount of the element to be detected is calculated by measuring only a single variable, the measurement error is reduced, and the measurement precision is improved.
The operation process of the device for testing the leakage amount of the liquid is as follows:
s1, detecting whether the oil cylinder and the one-way valve are leaked or not, and detecting whether the grating ruler, the two-position four-way electromagnetic valve and the pressure gauge are normal or not;
s2, setting a pressure critical value in a controller, wherein the pressure critical value is the pressure critical value of the second chamber of the oil cylinder and the pressure oil filled in the element to be detected, and the pressure gauge is connected with the controller to obtain the pressure critical value detected by the pressure gauge;
s3, the controller controls the right position of the two-position four-way electromagnetic valve, pressure oil enters through an oil filling port P of the two-position four-way electromagnetic valve and is respectively filled in the second cavity of the oil cylinder and the element to be detected through the one-way valve;
s4, after the pressure gauge detects a pressure critical value, the controller controls the left position of the two-position four-way electromagnetic valve, pressure oil is injected into the first chamber of the oil cylinder in a redirection mode, if the tested element does not leak, the piston of the oil cylinder keeps still, and meanwhile the moving distance of a measuring head test of the grating ruler is 0; if the tested element leaks, the piston of the oil cylinder moves towards the direction of the second cavity, meanwhile, the measuring head of the grating ruler moves together with the piston through the sliding connection assembly, and the moving distance of the measuring head of the grating ruler is the same as the moving distance h of the piston;
s5 according to formula V ═ pi (R)2-r2) X h, calculating the leakage amount of the tested element, wherein V is the sum of the volumes of the first chamber and the second chamber and is the leakage amount of the tested element; r is the radius of the inner wall of the oil cylinder; r is the outer diameter of the piston rod; h is the moving distance of the piston and the moving distance of the measuring head of the grating ruler.
The device for testing the liquid leakage amount measures the leakage amount of the element to be tested, not only improves the measurement precision, but also has larger measurement range, and the measurement precision can be up to 0.01 ml, thereby providing the application range of the invention.
Preferably, the first and second chambers have the same unit cross-sectional area, so that the radius of the inner wall of the first and second chambers is the same, and thus the radius of the inner wall is equal to pi (R) when passing V ═ pi (R)2-r2) When the leakage detection amount of the element to be detected is calculated by x h, only one variable h, namely the moving distance of the measuring head, is ensured, so that the leakage detection amount of the element to be detected is calculated by measuring only a single variable, the measurement error is reduced, and the measurement precision is improved.
Through the technical scheme, compared with the prior art, the invention discloses and provides
The invention establishes the connection between the tested element and the oil cylinder through the two-position four-way electromagnetic valve and the one-way valve, so that the invention only needs to test through the grating rulerThe head measures the distance moved by the piston of the cylinder, and then combines V ═ pi (R)2-r2) The invention can calculate the leakage quantity of the measured element by x h, thereby achieving the effect of improving the measurement precision, the measurement precision can be up to 0.01 ml, meanwhile, because the invention measures the displacement of the piston by the measuring head of the grating ruler, and the sliding connection component establishes the connection between the measuring head and the piston rod of the oil cylinder, the measuring head of the grating ruler has a larger measuring range, thereby expanding the application range of the invention, and meanwhile, the component cost of the invention is lower, therefore, compared with the flowmeter in the prior art, the cost can be obviously reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a device for testing liquid leakage amount according to the present invention.
Wherein, 1 is a pressure gauge; 2 is an oil cylinder; 21 is a piston; 22 is a first chamber; 23 is a second chamber; 24 is a piston rod; 3 is a grating ruler; 31 is a measuring head; 4 is a sliding connection assembly; 41 is a slide block; 42 is a track; 5 is a two-position four-way electromagnetic valve; 6 is a one-way valve; 7 is a tested element; and 8 is a connecting piece.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The hydraulic system and the connecting member 8 of the present invention are well known in the art and will not be described herein.
The embodiment of the invention discloses a device for testing liquid leakage, which is connected to a hydraulic system, wherein the hydraulic system is electrically connected with a controller;
the method comprises the following steps:
the piston 21 in the oil cylinder 2 limits an inner cavity of the oil cylinder 2 into a first cavity 22 and a second cavity 23, two ends of the piston 21 are provided with piston rods 24, and the piston rods 24 are respectively positioned in the first cavity 22 and the second cavity 23;
the casing of the grating ruler 3 is fixed with the cylinder body of the oil cylinder 2, the measuring head 31 of the grating ruler 3 is electrically connected with the controller, and the measuring head 31 of the grating ruler 3 is connected with the end part of one of the piston rods 24 through the sliding connection assembly 4;
the two-position four-way electromagnetic valve 5 is electrically connected with the controller; a first executive part interface of the two-position four-way electromagnetic valve 5 is communicated with the first chamber 22, and a second executive part interface is simultaneously communicated with the second chamber 23 and the tested element 7 through the one-way valve 6;
the pressure gauge 1 is connected to the hydraulic system, and is electrically connected to the controller, and a pressure critical value is set in the controller, and the pressure critical value is a pressure critical value at which the pressure oil in the second chamber 23 and the tested element 7 is filled.
In order to further optimize the technical scheme, the hydraulic oil cylinder further comprises a tooling plate, and the cylinder body of the oil cylinder 2 and the shell of the grating ruler 3 are fixed on the tooling plate.
In order to further optimize the above solution, the sliding connection assembly 4 comprises:
the sliding block 41, the sliding block 41 is fixed on the cylinder body of the oil cylinder 2;
and the track 42 is connected with the sliding block 41 in a sliding manner, one end of the track 42 is fixed with one end of one of the piston rods 24 through the connecting piece 8, the measuring head 31 of the grating ruler 3 is fixed on the track 42, and the measuring head 31 of the grating ruler 3 is close to one end of the track 42 connected with the piston rod 24.
In order to further optimize the technical scheme, an inlet of the one-way valve 6 is communicated with a second execution part interface of the two-position four-way electromagnetic valve 5, and an outlet of the one-way valve is communicated with the second chamber 23 and the element to be tested 7 respectively.
In order to further optimize the solution described above, the first chamber 22 and the second chamber 23 have an equal unit cross-sectional area.
The operation process of the device for testing the leakage amount of the liquid is as follows:
s1, detecting whether the oil cylinder 2 and the check valve 6 leak or not, and detecting whether the grating ruler 3, the two-position four-way electromagnetic valve 5 and the pressure gauge 1 are normal or not;
s2, setting a pressure critical value in the controller, wherein the pressure critical value is the pressure critical value of the second chamber 23 of the oil cylinder 2 and the pressure oil filled in the element 7 to be detected, and the pressure gauge 1 is connected with the controller to obtain the pressure critical value detected by the pressure gauge 1;
s3, the controller controls the right position of the two-position four-way electromagnetic valve 5, pressure oil enters through an oil filling port P of the two-position four-way electromagnetic valve 5 and is respectively filled in the second chamber 23 of the oil cylinder 2 and the element 7 to be detected through the one-way valve 6;
s4, after the pressure gauge 1 detects a pressure critical value, the controller controls the left position of the two-position four-way electromagnetic valve 5, pressure oil is injected into the first cavity 22 of the oil cylinder 2, if the detected element 7 does not leak, the piston 21 of the oil cylinder 2 keeps still, and meanwhile, the moving distance of the measuring head 31 of the grating ruler 3 is 0; if the tested element 7 detects leakage, the piston 21 of the oil cylinder 2 moves towards the direction of the second chamber 23, meanwhile, the measuring head 31 of the grating ruler 3 moves together with the piston 21 through the sliding connection assembly 4, and the moving distance of the measuring head 31 of the grating ruler 3 is the same as the moving distance h of the piston 21;
s5, according to the formula V ═ π R2-r2Xh, calculating the leakage amount of the tested element 7, wherein V is the sum of the volumes of the first chamber 22 and the second chamber 23 and is the leakage amount of the tested element 7; r is the radius of the inner wall of the oil cylinder 2; r is the outer diameter of the piston rod 24; h is the distance moved by the piston 21 and the distance moved by the probe 31 of the grating ruler 3.
In order to further optimize the solution described above, the first chamber 22 and the second chamber 23 have an equal unit cross-sectional area.
Example (b):
the embodiment of the invention discloses a device for testing the leakage amount of liquid, which is connected to a hydraulic system and electrically connected with a controller;
the method comprises the following steps:
the piston 21 in the oil cylinder 2 limits an inner cavity of the oil cylinder 2 into a first cavity 22 and a second cavity 23, the unit cross-sectional areas of the first cavity 22 and the second cavity 23 are equal, two ends of the piston 21 are provided with piston rods 24, and the piston rods 24 are respectively positioned in the first cavity 22 and the second cavity 23;
the casing of the grating ruler 3 and the cylinder body of the oil cylinder 2 are fixed on the tooling plate, the measuring head 31 of the grating ruler 3 is electrically connected with the controller, and the measuring head 31 of the grating ruler 3 is connected with the end part of one of the piston rods 24 through the sliding connection assembly 4;
and the sliding connection assembly 4 comprises:
the sliding block 41, the sliding block 41 is fixed on the cylinder body of the oil cylinder 2;
the track 42 is connected with the sliding block 41 in a sliding manner, one end of the track 42 is fixed with one end of one of the piston rods 24 through the connecting piece 8, meanwhile, the measuring head 31 of the grating ruler 3 is fixed on the track 42, and the measuring head 31 of the grating ruler 3 is close to one end, connected with the piston rod 24, of the track 42;
the two-position four-way electromagnetic valve 5 is electrically connected with the controller; a first executive part interface of the two-position four-way electromagnetic valve 5 is communicated with the first chamber 22, a second executive part interface is simultaneously communicated with the second chamber 23 and communicated with the element 7 to be tested through the one-way valve 6, an inlet of the one-way valve 6 is communicated with a second executive part interface of the two-position four-way electromagnetic valve 5, and outlets of the one-way valve 6 are respectively communicated with the second chamber 23 and the element 7 to be tested;
the pressure gauge 1 is connected to the hydraulic system, and is electrically connected to the controller, and a pressure critical value is set in the controller, and the pressure critical value is a pressure critical value at which the pressure oil in the second chamber 23 and the tested element 7 is filled.
The operation process of the device for testing the leakage amount of the liquid is as follows:
s1, detecting whether the oil cylinder 2 and the check valve 6 leak or not, and detecting whether the grating ruler 3, the two-position four-way electromagnetic valve 5 and the pressure gauge 1 are normal or not;
s2, setting a pressure critical value in the controller, wherein the pressure critical value is the pressure critical value of the second chamber 23 of the oil cylinder 2 and the pressure oil filled in the element 7 to be detected, and the pressure gauge 1 is connected with the controller to obtain the pressure critical value detected by the pressure gauge 1;
s3, the controller controls the right position of the two-position four-way electromagnetic valve 5, pressure oil enters through an oil filling port P of the two-position four-way electromagnetic valve 5 and is respectively filled in the second chamber 23 of the oil cylinder 2 and the element 7 to be detected through the one-way valve 6;
s4, after the pressure gauge 1 detects a pressure critical value, the controller controls the left position of the two-position four-way electromagnetic valve 5, pressure oil is injected into the first cavity 22 of the oil cylinder 2, if the detected element 7 does not leak, the piston 21 of the oil cylinder 2 keeps still, and meanwhile, the moving distance of the measuring head 31 of the grating ruler 3 is 0; if the tested element 7 detects leakage, the piston 21 of the oil cylinder 2 moves towards the direction of the second chamber 23, meanwhile, the measuring head 31 of the grating ruler 3 moves together with the piston 21 through the sliding connection assembly 4, and the moving distance of the measuring head 31 of the grating ruler 3 is the same as the moving distance h of the piston 21;
s5, according to the formula V ═ π R2-r2Xh, calculating the leakage amount of the tested element 7, wherein V is the sum of the volumes of the first chamber 22 and the second chamber 23 and is the leakage amount of the tested element 7; r is the radius of the inner wall of the oil cylinder 2; r is the outer diameter of the piston rod 24; h is the distance moved by the piston 21 and the distance moved by the probe 31 of the grating ruler 3.
Because the invention establishes the relation between the element to be measured 7 and the oil cylinder 2 through the two-position four-way electromagnetic valve 5 and the one-way valve 6, the distance moved by the piston 21 of the oil cylinder 2 is measured through the measuring head 31 of the grating ruler 3, and then V ═ pi (R) is combined2-r2) The leakage quantity of the tested element 7 can be calculated by x h, so that the effect of improving the measurement precision can be achieved, the measurement precision can be up to 0.01 ml, and meanwhile, the displacement of the piston 21 is measured by the measuring head 31 of the grating ruler 3And the measuring head 31 of the grating ruler 3 is connected with the piston rod 24 of the oil cylinder 2 through the sliding connection assembly 4, so that the measuring head 31 has a large measuring range.
And the cost of the components making up the invention is lower, thus significantly reducing the cost compared to prior art flowmeters.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A device for testing the liquid leakage amount is connected to a hydraulic system, and the hydraulic system is electrically connected with a controller; it is characterized by comprising:
the oil cylinder (2), a piston (21) in the oil cylinder (2) limits an inner cavity of the oil cylinder (2) into a first chamber (22) and a second chamber (23), two ends of the piston (21) are respectively provided with a piston rod (24), and the piston rods (24) are respectively positioned in the first chamber (22) and the second chamber (23);
the casing of the grating ruler (3) is fixed with the cylinder body of the oil cylinder (2), the measuring head (31) of the grating ruler (3) is electrically connected with the controller, and the measuring head (31) of the grating ruler (3) is connected with the end part of one piston rod (24) through a sliding connection assembly (4);
the two-position four-way electromagnetic valve (5), the two-position four-way electromagnetic valve (5) is electrically connected with the controller; a first executive part interface of the two-position four-way electromagnetic valve (5) is communicated with the first chamber (22), and a second executive part interface is simultaneously communicated with the second chamber (23) and a tested element (7) through a one-way valve (6);
the pressure gauge (1) is connected to the hydraulic system and electrically connected with the controller, a pressure critical value is arranged in the controller, and the pressure critical value is the pressure critical value which is filled with the pressure oil in the second cavity (23) and the tested element (7).
2. The device for testing the leakage amount of the liquid according to claim 1, further comprising a tool plate, wherein the cylinder body of the oil cylinder (2) and the housing of the grating ruler (3) are fixed on the tool plate.
3. A device for testing the amount of leakage of liquid according to claim 1, characterised in that the sliding connection assembly (4) comprises:
the sliding block (41), the sliding block (41) is fixed on the cylinder body of the oil cylinder (2);
the track (42) is connected with the sliding block (41) in a sliding mode, one end of the track (42) is fixed to one end of one of the piston rods (24) through a connecting piece (8), meanwhile, the measuring head (31) of the grating ruler (3) is fixed to the track (42), and the measuring head (31) of the grating ruler (3) is close to one end, connected with the piston rod (24), of the track (42).
4. A device for testing the leakage of liquid according to claim 1, wherein the inlet of the check valve (6) is connected to the second actuator port of the two-position four-way solenoid valve (5), and the outlet is connected to the second chamber (23) and the tested element (7), respectively.
5. A device for testing the amount of leakage of a liquid according to claim 1, wherein the first chamber (22) and the second chamber (23) have an equal unit cross-sectional area.
6. The operation process of the device for testing the leakage amount of the liquid is as follows:
s1, detecting whether the oil cylinder (2) and the one-way valve (6) leak or not, and detecting whether the grating ruler (3), the two-position four-way electromagnetic valve (5) and the pressure gauge (1) are normal or not;
s2, setting a pressure critical value in a controller, wherein the pressure critical value is the pressure critical value of the second chamber (23) of the oil cylinder (2) and the pressure oil filled in the element to be detected (7), and the pressure gauge (1) is connected with the controller to obtain the pressure critical value detected by the pressure gauge (1);
s3, the controller controls the right position of the two-position four-way electromagnetic valve (5), pressure oil enters through an oil filling port P of the two-position four-way electromagnetic valve (5) and is respectively filled in a second cavity (23) of the oil cylinder (2) and the element to be detected (7) through the one-way valve (6);
s4, after the pressure gauge (1) detects a pressure critical value, the controller controls the left position of the two-position four-way electromagnetic valve (5), pressure oil is injected into a first cavity (22) of the oil cylinder (2) in a redirection mode, if the tested element (7) does not leak, the piston (21) of the oil cylinder (2) keeps still, and meanwhile the moving distance of a measuring head (31) of the grating ruler (3) in a test is 0; if the element to be measured (7) leaks, the piston (21) of the oil cylinder (2) moves towards the direction of the second chamber (23), meanwhile, the measuring head (31) of the grating ruler (3) moves together with the piston (21) through a sliding connection assembly (4), and the moving distance of the measuring head (31) of the grating ruler (3) is the same as the moving distance h of the piston (21);
s5 according to formula V ═ pi (R)2-r2) -xh, calculating the leakage of the element under test (7), wherein V is the sum of the volumes of the first chamber (22) and the second chamber (23) and is simultaneously the leakage of the element under test (7); r is the radius of the inner wall of the oil cylinder (2); r is the outer diameter of the piston rod (24); h is the moving distance of the piston (21) and the moving distance of a measuring head (31) of the grating ruler (3).
7. A device for testing the amount of leakage of liquid according to claim 6, characterised in that the first chamber (22) and the second chamber (23) have an equal unit cross-sectional area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910968564.7A CN110748531A (en) | 2019-10-12 | 2019-10-12 | Device for testing liquid leakage amount |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910968564.7A CN110748531A (en) | 2019-10-12 | 2019-10-12 | Device for testing liquid leakage amount |
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| CN110748531A true CN110748531A (en) | 2020-02-04 |
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| CN201910968564.7A Pending CN110748531A (en) | 2019-10-12 | 2019-10-12 | Device for testing liquid leakage amount |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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