CN116242603B - Online checking device for breather valve - Google Patents
Online checking device for breather valve Download PDFInfo
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- CN116242603B CN116242603B CN202310527964.0A CN202310527964A CN116242603B CN 116242603 B CN116242603 B CN 116242603B CN 202310527964 A CN202310527964 A CN 202310527964A CN 116242603 B CN116242603 B CN 116242603B
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- breather valve
- piston
- guide rod
- pressure
- compression spring
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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
- G01M13/003—Machine valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The application relates to the technical field of breather valve calibration, in particular to an online breather valve calibration device which comprises a differential pressure cylinder, wherein the differential pressure cylinder is connected with an air pipe, the air pipe is connected with a vacuum cover and is used for creating a sealing space around a breather valve, a piston is arranged in the differential pressure cylinder, a balancing weight is arranged on the piston, the piston is connected with a movable rack, the movable rack is in meshed connection with a check gear, the check gear is connected with a mounting shaft, the mounting shaft is arranged on the inner wall of the differential pressure cylinder, a friction wheel is fixedly arranged on the mounting shaft, the friction wheel is adaptively connected with a friction plate, the friction plate is connected with a compression spring, the compression spring is connected with a spring seat, the spring seat is connected with a driving mechanism, and a distance meter is further arranged on the spring seat and is used for detecting the distance between the spring seat and the friction plate. The replacement of the balancing weight is not needed according to different specifications of the breather valve, and the effective balancing weight of the balancing weight can be changed only by changing the length of the compression spring through the driving mechanism, so that the breather valve is convenient and quick.
Description
Technical Field
The application relates to the technical field of breather valve verification, in particular to an online breather valve verification device.
Background
The breather valve is a valve which can ensure that the storage tank space is isolated from the atmosphere in a certain pressure range and can be communicated with the atmosphere when the pressure range is exceeded or undershot, and is commonly applied to devices such as storage tanks. In order to ensure that the breather valve can work normally, the breather valve needs to be checked regularly, and the breather valve is detached for checking in a conventional checking mode, so that the breather valve is very troublesome.
The application patent of China with the application number of 201910171138.0 discloses a breather valve on-line detection device, wherein an air cavity and a piston capable of sliding up and down are arranged in a pressure difference generation chamber, the pressure difference generation chamber is connected with a vacuum cover through a hose, the vacuum cover is adsorbed on a position of a tank body to be detected, which is provided with a breather valve, and the piston is driven to move downwards through a balancing weight, so that the pressure in the vacuum cover is changed, whether the breather valve is triggered or not is detected, and the purpose of on-line detection of the breather valve function is achieved.
However, the present inventors have found that the prior art has at least the following problems:
for the breather valves with different specifications, the pressure differences required by triggering are different, so that the balancing weights with various specifications are required to be prepared for replacement, the pressure differences generated by the pressure difference chambers are changed, the time and the labor are wasted, and the verification efficiency is reduced.
Disclosure of Invention
Therefore, the application aims to provide an online checking device for a breather valve, which solves the problems that in the prior art, balancing weights with various specifications are required to be prepared for replacement, and the checking efficiency is reduced.
Based on the above purpose, the application provides an online checking device for a breather valve, which is applied to checking the breather valve on a saving tank and comprises a base, wherein two groups of vertical plates are installed on the base, a turnover shaft is installed between the two groups of vertical plates, the turnover shaft is in power connection with a turnover motor, a differential pressure cylinder is installed on the turnover shaft, the differential pressure cylinder is connected with an air pipe, the air pipe is connected with a vacuum cover and is used for creating a sealed space around the breather valve, a piston is installed in the differential pressure cylinder, a balancing weight is installed on the piston, the piston is connected with a movable rack, the movable rack is in meshed connection with a saving gear, the saving gear is connected with a mounting shaft, the mounting shaft is installed on the inner wall of the differential pressure cylinder, a friction wheel is fixedly installed on the mounting shaft, the friction wheel is in fit connection with a friction plate, the compression spring is connected with a spring seat, the spring seat is connected with a driving mechanism, and a range finder is further arranged on the spring seat and is used for detecting the distance between the spring seat and the friction plate.
The vacuum cover is covered on the breather valve, the vacuum cover can be fixedly adsorbed on the accumulator tank through the electromagnet, a sealed space is formed around the breather valve, then the air pressure in the accumulator tank to be tested, the pressure difference cylinder and the vacuum cover is adjusted to be the same as the air pressure of the external environment, at the moment, the driving mechanism drives the spring seat to apply thrust to the friction plate, the friction plate is tightly propped against the friction wheel, the throttling gear is fixed and can not rotate, then the pressure difference cylinder, the vacuum cover and the accumulator tank are kept sealed, the driving mechanism drives the spring seat to be far away from the friction plate according to the trigger pressure difference of the breather valve to be checked, the elasticity of the compression spring is changed, the friction force between the friction plate and the friction wheel is changed, the effective balance weight of the balance weight is changed, the breather valve is suitable for checking of different specifications, when the negative pressure difference is required to be checked, the turnover shaft is driven by the turnover motor, the pressure difference cylinder is inverted, the piston moves outwards under the action of gravity, and negative pressure is generated in the pressure difference cylinder and the vacuum cover, and whether the breather valve is triggered is checked. When checking, need not to carry out the change of balancing weight according to the different specifications of breather valve, only need change compression spring's length through actuating mechanism, can change the effective counter weight of balancing weight, convenient and fast.
Optionally, a control module is installed on the vertical plate, and the control module includes:
the input unit is used for inputting the trigger pressure difference of the breather valve to be detected;
a calculation unit for calculating an effective weight of the piston according to the trigger pressure difference; calculating the preset deformation of the compression spring according to the calculated effective balance weight of the piston;
and the signal transmission unit is used for transmitting signals to the driving mechanism and the range finder according to the compression deformation quantity, the driving mechanism drives the compression spring to compress, and the range finder detects the deformation quantity of the compression spring in real time until the deformation quantity reaches the preset deformation quantity.
Optionally, the calculating the effective weight of the piston according to the trigger pressure difference includes:
calculating preset pressure to be reached by the differential pressure cylinder according to the trigger differential pressure of the breather valve to be detected:wherein->For the preset pressure to be reached by the pressure difference cylinder, < >>For triggering the pressure difference of the breathing valve, +.>Is the pressure of the accumulator tank;
calculating the effective weight of the piston according to the preset pressure:wherein->Is effective weight of piston, +.>And s is the stress area of the piston, which is the preset pressure required to be reached by the differential pressure cylinder.
Optionally, calculating the preset deformation of the compression spring according to the calculated effective balance weight of the piston includes:the method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>An effective counterweight for the piston; />The weight is the weight of the balancing weight, the piston and the moving rack;the friction factor between the friction plate and the friction wheel; k is the elastic coefficient of the compression spring; x is the deformation of the compression spring; f is the friction force between the piston and the inner wall of the differential pressure cylinder.
Optionally, the actuating mechanism includes the drive shaft of installing on pressure differential section of thick bamboo inner wall, installs drive gear on the drive shaft, and drive gear meshing is connected with thrust rack, and thrust rack outside cover is equipped with the installation section of thick bamboo, and installation section of thick bamboo fixed mounting is on pressure differential section of thick bamboo inner wall, thrust rack and spring holder fixed connection.
Optionally, the installation shaft is connected with a synchronous gear, the synchronous gear is in meshed connection with a sliding rack, an installation groove is formed in the differential pressure cylinder, the sliding rack is adaptively installed in the installation groove, the end part of the sliding rack is connected with a guide rod, a magnetic force field is arranged in the differential pressure cylinder, the guide rod vertically cuts magnetic induction line motion in the magnetic force field, the guide rod is electrically connected with a potentiometer, the potentiometer is used for measuring an electromotive force value generated by the motion of the guide rod in the magnetic force field, and the signal transmission unit is used for grabbing the electromotive force value; and the control module judges whether the breather valve is triggered or not according to the grasped electromotive force value.
During the use, the piston descends under the effect of balancing weight, has certain acceleration, along with the piston descends, the pressure in the pressure differential section of thick bamboo increases, then the acceleration that the piston descends gradually reduces, until the effort of pressure in the pressure differential section of thick bamboo to the piston equals the effective counter weight of piston, the acceleration of piston is zero this moment, in this process, if the breather valve triggers, then the pressure in the pressure differential section of thick bamboo reduces, the acceleration of piston can appear increasing, then judge the breather valve and trigger this moment, likewise, the pressure differential section of thick bamboo rotates 180, the air in the pressure differential section of thick bamboo is pulled to the piston, the pressure in the pressure differential section of thick bamboo gradually reduces, the negative pressure that produces in the pressure differential section of thick bamboo gradually increases, then the acceleration of piston gradually reduces, if the breather valve triggers, the acceleration of piston can appear increasing.
Optionally, the potentiometer is used for measuring an electromotive force value generated by movement of the guide rod in the magnetic force field, and the electromotive force value is measured once every interval time t; the calculating unit is used for calculating the instantaneous speeds of the guide rod at different moments according to a plurality of instantaneous electromotive force valuesThe method comprises the steps of carrying out a first treatment on the surface of the The control module further comprises a judging unit for judging whether the acceleration of the guide rod is increased.
Optionally, the calculating unit is used for calculating the instantaneous speeds of the guide rod at different moments according to a plurality of instantaneous electromotive force valuesComprising the following steps: />，/>.../>Wherein->B is the magnetic induction intensity of the magnetic force field, and l is the effective length of the magnetic force field cut by the guide rod; the calculating unit is also used for calculating the instantaneous acceleration of the guide rod at different moments according to the instantaneous speed of the guide rod at different moments,，/>.../>wherein->Is the initial speed of the guide rod; the judging unit judges->＜/>，/>＜/>.../>＜/>If the time period is not established, judging that the breather valve is not triggered, and if the time period is not established, judging that the breather valve is triggered.
Optionally, the judging unit is configured to judge that the instantaneous acceleration of the guide rod begins to increase when the instantaneous acceleration of the guide rod is zero, and judge that the check result of the breather valve is normal, if the instantaneous acceleration of the guide rod begins to increase before the instantaneous acceleration of the guide rod is zero, judge that the trigger pressure difference of the breather valve is smaller, and if the instantaneous acceleration of the guide rod begins to increase after the instantaneous acceleration of the guide rod is zero, judge that the trigger pressure difference of the breather valve is larger.
Optionally, the judging unit judges that the instantaneous acceleration of the guide rod is zero, or when the breather valve is triggered, the signal transmission unit controls the driving mechanism to squeeze the compression spring for stopping rotating the gear.
The application has the beneficial effects that: the application provides an online checking device for a breather valve, which is characterized in that a driving mechanism drives a spring seat to apply thrust to a friction plate, so that the friction plate abuts against the friction plate, a throttle gear is fixed and cannot rotate, then a differential pressure cylinder, a vacuum cover and a saving box are kept sealed, the driving mechanism drives the spring seat to be away from the friction plate according to the trigger differential pressure of the breather valve to be checked, the elasticity of a compression spring is changed, so that the friction force between the friction plate and the friction plate is changed, the effective counter weight of a counter weight is changed, and further the online checking device is suitable for checking breather valves of different specifications. When checking, need not to carry out the change of balancing weight according to the different specifications of breather valve, only need change compression spring's length through actuating mechanism, can change the effective counter weight of balancing weight, convenient and fast.
Drawings
In order to more clearly illustrate the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the application and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of an online check device for a breather valve according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an internal structure of an online check device for a breather valve according to an embodiment of the present application;
FIG. 3 is a schematic diagram of the internal structure of a differential pressure cylinder of an online check device for a breather valve according to an embodiment of the present application;
FIG. 4 is a schematic view of a part of the enlarged structure of the portion A in FIG. 3;
FIG. 5 is a schematic diagram illustrating an internal structure of a breather valve on-line calibration device in a top view direction according to an embodiment of the present application;
FIG. 6 is a schematic view of a part of the enlarged structure of the portion B in FIG. 5;
fig. 7 is a schematic diagram of connection of a control device of an online check device for a breather valve according to an embodiment of the present application.
Marked in the figure as:
101. a base; 102. a universal wheel; 103. a vertical plate; 104. an air pipe; 105. a vacuum cover; 201. a differential pressure cylinder; 202. a turnover motor; 203. a turnover shaft; 204. a guide cylinder; 205. a connecting rod; 206. moving the rack; 207. a piston; 208. balancing weight; 209. a gear is saved; 210. a mounting shaft; 211. a friction plate; 212. a telescopic rod; 213. a compression spring; 214. a spring seat; 215. a range finder; 216. a mounting cylinder; 217. a thrust rack; 218. a drive gear; 219. a drive shaft; 220. a friction wheel; 301. a synchronizing gear; 302. a mounting groove; 303. sliding racks; 304. a guide rod; 305. a magnetic force field; 401. a control module; 402. a signal transmission unit; 403. a calculation unit; 404. a judging unit; 405. an input unit.
Detailed Description
The present application will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present application more apparent.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As shown in fig. 1 to 6, a specific embodiment of the present application provides an online verification device for a breather valve, which is applied to a breather valve on a tank, and includes a base 101, two sets of upright plates 103 are installed on the base 101, a turning shaft 203 is installed between the two sets of upright plates 103, the turning shaft 203 is dynamically connected with a turning motor 202, a differential pressure cylinder 201 is installed on the turning shaft 203, the differential pressure cylinder 201 is connected with an air pipe 104, the air pipe 104 is connected with a vacuum cover 105 for creating a sealed space around the breather valve, a piston 207 is installed inside the differential pressure cylinder 201, a balancing weight 208 is installed on the piston 207, the piston 207 is connected with a moving rack 206, the moving rack 206 is in meshing connection with a pitch gear 209, the pitch gear 209 is connected with a mounting shaft 210, the mounting shaft 210 is installed on the inner wall of the differential pressure cylinder 201, a friction wheel 220 is fixedly installed on the mounting shaft 210, the friction wheel 220 is adaptively connected with a friction plate 211, the compression spring 213 is connected with the compression spring 213, the compression spring 213 is connected with a spring seat 214, the spring seat 214 is connected with a driving mechanism, and a distance meter 215 is further installed on the spring seat 214 for detecting the distance between the friction plate 211 and the friction plate.
When the vacuum cover 105 is used, the vacuum cover 105 is covered on the breather valve, the vacuum cover 105 can be fixedly adsorbed on the accumulator tank through the electromagnet, a sealing space is formed around the breather valve, then the air pressure in the accumulator tank to be tested, the pressure difference cylinder 201 and the vacuum cover 105 is adjusted to be the same as the air pressure of the external environment, at the moment, the driving mechanism drives the spring seat 214 to apply thrust to the friction plate 211, so that the friction plate 211 tightly supports the friction wheel 220, the check gear 209 is fixed and cannot rotate, then the pressure difference cylinder 201, the vacuum cover 105 and the accumulator tank are kept sealed, the driving mechanism drives the spring seat 214 to be far away from the friction plate 211 according to the trigger pressure difference of the breather valve to be checked, the elasticity of the compression spring 213 is changed, so that the friction force between the friction plate 211 and the friction wheel 220 is changed, and the effective balance weight of the balance weight 208 is further changed, thereby being suitable for checking the breather valve with different specifications, when the negative pressure difference needs to be checked, the overturning motor 202 drives the overturning shaft 203, the pressure difference cylinder 201 is overturned, the piston 207 moves outwards under the action of gravity, so that the negative pressure is generated in the pressure difference cylinder 201 and the vacuum cover 105. When checking, the replacement of the balancing weight 208 is not required according to different specifications of the breather valve, and the effective balancing weight of the balancing weight 208 can be changed only by changing the length of the compression spring 213 through the driving mechanism, so that the breather valve is convenient and quick.
In some alternative embodiments, as shown in fig. 5 and 6, the friction wheel 220 has a diameter equal to the pitch circle of the pitch gear 209.
In some alternative embodiments, as shown in fig. 3, 4 and 7, a control module 401 is installed on the riser 103, where the control module 401 includes:
an input unit 405 for inputting a trigger pressure difference of the respiratory valve to be tested;
a calculation unit 403 for calculating an effective weight of the piston 207 according to the trigger pressure difference; calculating a preset deformation amount of the compression spring 213 according to the calculated effective weight of the piston 207;
the signal transmission unit 402 is configured to send a signal to the driving mechanism and the rangefinder 215 according to the compression deformation amount, where the driving mechanism drives the compression spring 213 to compress, and the rangefinder 215 detects the deformation amount of the compression spring 213 in real time until reaching a preset deformation amount.
The preset deformation quantity of the compression spring 213 can be automatically calculated by inputting the trigger pressure difference of the breather valve to be detected, so that the effective balance weight of the piston 207 is changed, the breather valve is suitable for breather valves of different specifications, and the working efficiency is improved.
In some alternative embodiments, the calculating the effective weight of the piston 207 based on the trigger pressure differential includes:
according to the trigger pressure difference of the breather valve to be detected, the preset pressure to be reached by the pressure difference cylinder 201 is calculated:wherein->For a preset pressure to be reached by the pressure difference cartridge 201, +.>For the triggering pressure difference of the breathing valve,is the pressure of the accumulator tank;
the effective weight of the piston 207 is calculated from the preset pressure:wherein->Is an effective weight for the piston 207,the preset pressure to be reached by the pressure difference cylinder 201 is s, which is the force bearing area of the piston 207.
In some alternative embodiments, calculating the preset deformation amount of the compression spring 213 based on the calculated effective weight of the piston 207 includes:the method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>Effective weight for piston 207; />Weight 208 and the weight of piston 207 and moving rack 206; />Is the friction factor between friction plate 211 and friction wheel 220; k is the spring constant of the compression spring 213; x is the deformation amount of the compression spring 213; f is the friction force between the piston 207 and the inner wall of the differential pressure cylinder 201. The preset amount of deformation of the compression spring 213 can be generally calculated to control the effective weight of the piston 207 to achieve the effect of verifying different types of breathing valves.
In some alternative embodiments, as shown in fig. 4, the driving mechanism includes a driving shaft 219 installed on the inner wall of the pressure differential cylinder 201, a driving gear 218 is installed on the driving shaft 219, a thrust rack 217 is engaged with and connected to the driving gear 218, a mounting cylinder 216 is sleeved outside the thrust rack 217, the mounting cylinder 216 is fixedly installed on the inner wall of the pressure differential cylinder 201, and the thrust rack 217 is fixedly connected to the spring seat 214. The driving shaft 219 drives the driving gear 218 to rotate, so that the driving thrust rack 217 is meshed to move, and the thrust rack 217 moves to compress the compression spring 213 to generate pressure on the friction plate 211.
In some alternative embodiments, as shown in fig. 5 and fig. 6, the mounting shaft 210 is connected with a synchronous gear 301, the synchronous gear 301 is in meshed connection with a sliding rack 303, a mounting groove 302 is arranged in the differential pressure cylinder 201, the sliding rack 303 is adaptively mounted in the mounting groove 302, the end part of the sliding rack 303 is connected with a guide rod 304, a magnetic field 305 is arranged in the differential pressure cylinder 201, the guide rod 304 performs vertical cutting magnetic induction line movement in the magnetic field 305, the guide rod 304 is electrically connected with a potentiometer, the potentiometer is used for measuring an electromotive force value generated by movement of the guide rod 304 in the magnetic field 305, and the signal transmission unit 402 is used for capturing the electromotive force value; the control module 401 determines whether the breather valve is triggered according to the grasped electromotive force value. In use, the piston 207 descends under the action of the balancing weight 208, and has a certain acceleration, along with the descent of the piston 207, the pressure in the differential pressure cylinder 201 increases, the descending acceleration of the piston 207 gradually decreases until the acting force of the pressure in the differential pressure cylinder 201 on the piston 207 is equal to the effective balancing weight of the piston 207, the acceleration of the piston 207 is zero, in the process, if the breather valve is triggered, the pressure in the differential pressure cylinder 201 decreases, the acceleration of the piston 207 increases, the breather valve is judged to be triggered at the moment, the differential pressure cylinder 201 rotates by 180 degrees, the piston 207 pulls air in the differential pressure cylinder 201, the pressure in the differential pressure cylinder 201 gradually decreases, the negative pressure generated in the differential pressure cylinder 201 gradually increases, the acceleration of the piston 207 gradually decreases, and if the breather valve is triggered, the acceleration of the piston 207 increases.
In some alternative embodiments, as shown in fig. 5, 6 and 7, the potentiometer is used to measure the electromotive force generated by the movement of the guide bar 304 in the magnetic field 305, including measuring the instantaneous electromotive force value once every interval t; the calculating unit 403 is configured to calculate the instantaneous speeds of the guide rod 304 at different moments according to the instantaneous electromotive force valuesThe method comprises the steps of carrying out a first treatment on the surface of the The control module 401 further includes a determining unit 404 for determining whether the acceleration of the guide rod 304 increases.
In some alternative embodiments, as shown in FIG. 7, the computing unit 403For calculating the instantaneous speed of the guide bar 304 at different moments based on the instantaneous electromotive force valuesComprising the following steps: />，/>...Wherein->B is the magnetic induction intensity of the magnetic force field 305, and l is the effective length of the magnetic force field 305 cut by the guide rod 304; the calculating unit 403 is further adapted to calculate the instantaneous acceleration of the guiding rod 304 at different moments according to the instantaneous speed of the guiding rod 304 at different moments,/v->，.../>Wherein->Is the initial speed of the guide rod 304; the judgment unit 404 judges +.>＜，/>＜/>.../>＜/>If the time period is not established, judging that the breather valve is not triggered, and if the time period is not established, judging that the breather valve is triggered. In use, the magnetic field 305 is set to have a small magnetic induction so that the force generated by the electromagnetic force on the guide bar 304 is negligible on the whole device.
In some alternative embodiments, as shown in fig. 3 to 7, the determining unit 404 determines that the instantaneous acceleration of the guide rod 304 starts to increase when the instantaneous acceleration of the guide rod 304 is zero, determines that the check result of the respiratory valve is normal, determines that the trigger pressure difference of the respiratory valve is smaller if the instantaneous acceleration of the guide rod 304 starts to increase before the instantaneous acceleration of the guide rod 304 is zero, and determines that the trigger pressure difference of the respiratory valve is larger if the instantaneous acceleration of the guide rod 304 starts to increase after the instantaneous acceleration of the guide rod 304 is zero.
Because the instantaneous acceleration of the guide rod 304 is zero, the stress balance of the piston 207 is achieved at this time, and the pressure difference cylinder 201 reaches the preset pressure, the triggering of the breather valve at this time indicates that the breather valve is normal in verification, the triggering before the triggering indicates that the trigger pressure difference of the breather valve is smaller, and the triggering after the triggering indicates that the trigger pressure difference of the breather valve is larger.
In some alternative embodiments, as shown in fig. 3 to 7, the determining unit 404 determines that the instantaneous acceleration of the guide rod 304 is zero, or when the breather valve is triggered, the signal transmission unit 402 controls the driving mechanism to compress the compression spring 213 for stopping the pitch gear 209. The piston 207 is prevented from affecting the verification result due to inertia.
In some alternative embodiments, as shown in fig. 1, a universal wheel 102 is provided at the bottom of the base 101 to facilitate movement.
In some alternative embodiments, as shown in fig. 1 and 2, a guiding cylinder 204 is sleeved outside the moving rack 206, the guiding cylinder 204 is connected with a connecting rod 205, and the connecting rod 205 is fixedly mounted on the inner wall of the pressure difference cylinder 201.
In some alternative embodiments, as shown in fig. 4, a telescopic rod 212 is installed between the friction plate 211 and the spring seat 214. So that the operation of the friction plate 211 is more stable.
The working principle of the application is as follows: when the vacuum cover 105 is used, the vacuum cover 105 is covered on the breather valve, the vacuum cover 105 can be fixedly adsorbed on the accumulator tank through the electromagnet, a sealing space is formed around the breather valve, then the air pressure in the accumulator tank to be tested, the pressure difference cylinder 201 and the vacuum cover 105 is adjusted to be the same as the air pressure of the external environment, at the moment, the driving mechanism drives the spring seat 214 to apply thrust to the friction plate 211, so that the friction plate 211 tightly supports the friction wheel 220, the check gear 209 is fixed and cannot rotate, then the pressure difference cylinder 201, the vacuum cover 105 and the accumulator tank are kept sealed, the driving mechanism drives the spring seat 214 to be far away from the friction plate 211 according to the trigger pressure difference of the breather valve to be checked, the elasticity of the compression spring 213 is changed, so that the friction force between the friction plate 211 and the friction wheel 220 is changed, and the effective balance weight of the balance weight 208 is further changed, thereby being suitable for checking the breather valve with different specifications, when the negative pressure difference needs to be checked, the overturning motor 202 drives the overturning shaft 203, the pressure difference cylinder 201 is overturned, the piston 207 moves outwards under the action of gravity, so that the negative pressure is generated in the pressure difference cylinder 201 and the vacuum cover 105. When checking, the replacement of the balancing weight 208 is not required according to different specifications of the breather valve, and the effective balancing weight of the balancing weight 208 can be changed only by changing the length of the compression spring 213 through the driving mechanism, so that the breather valve is convenient and quick.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the application (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the application, the steps may be implemented in any order and there are many other variations of the different aspects of the application as described above, which are not provided in detail for the sake of brevity.
The present application is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present application should be included in the scope of the present application.
Claims (6)
1. The utility model provides a breather valve on-line verification device, is applied to breather valve on-line verification on the accumulator tank, including base (101), install two sets of risers (103) on base (101), install tilting shaft (203) between two sets of risers (103), tilting shaft (203) power connection has tilting motor (202), install pressure differential section of thick bamboo (201) on tilting shaft (203), pressure differential section of thick bamboo (201) are connected with trachea (211), trachea (105) are connected with vacuum cover for create sealed space around the breather valve, characterized in that, pressure differential section of thick bamboo (201) internally mounted has piston (207), installs balancing weight (208) on piston (207), piston (207) are connected with movable rack (206), movable rack (206) meshing is connected with pitch gear (209), pitch gear (209) are connected with installation axle (210), installation axle (210) are installed on pressure differential section of thick bamboo (201) inner wall, install and install friction wheel (220) on fixed, friction wheel (220) adaptation is connected with friction plate (211), friction plate (211) are connected with compression spring (213), are connected with compression spring (214) and are connected with spring seat (214) and are equipped with distance measuring instrument (214), for detecting the deformation amount of the compression spring (213);
a control module (401) is installed on the vertical plate (103), and the control module (401) comprises:
an input unit (405) for inputting a trigger pressure difference of the breather valve to be tested;
a calculation unit (403) for calculating an effective weight of the piston (207) from the trigger pressure difference; calculating a preset deformation amount of the compression spring (213) according to the calculated effective weight of the piston (207);
the signal transmission unit (402) is used for sending a signal to the driving mechanism and the range finder (215) according to the preset deformation amount, the driving mechanism drives the compression spring (213) to compress, and the range finder (215) detects the deformation amount of the compression spring (213) in real time until the preset deformation amount is reached;
the device is characterized in that the installation shaft (210) is connected with a synchronous gear (301), the synchronous gear (301) is connected with a sliding rack (303) in a meshed mode, an installation groove (302) is formed in the differential pressure cylinder (201), the sliding rack (303) is installed in the installation groove (302) in an adapting mode, the end portion of the sliding rack (303) is connected with a guide rod (304), a magnetic field (305) is arranged in the differential pressure cylinder (201), the guide rod (304) vertically cuts magnetic induction line movement in the magnetic field (305), the guide rod (304) is electrically connected with a potentiometer, the potentiometer is used for measuring an electromotive force value generated by movement of the guide rod (304) in the magnetic field (305), and the signal transmission unit (402) is used for grabbing the electromotive force value; the control module (401) judges whether the breather valve is triggered according to the grasped electromotive force value;
the potentiometer is used for measuring an electromotive force value generated by movement of the guide rod (304) in the magnetic force field (305), and comprises measuring an instantaneous electromotive force value every interval time t; the calculating unit (403) is used for calculating the instantaneous speeds of the guide rod (304) at different moments according to a plurality of instantaneous electromotive force valuesThe method comprises the steps of carrying out a first treatment on the surface of the The control module (401) further comprises a judging unit (404) for judging whether the acceleration of the guide rod (304) is increased;
the judging unit (404) is configured to judge whether the trigger pressure difference of the breather valve meets a standard, if the instantaneous acceleration of the guide rod (304) is zero, the instantaneous acceleration of the guide rod (304) starts to increase, then it is judged that the check result of the breather valve is normal, if the instantaneous acceleration of the guide rod (304) starts to increase before the instantaneous acceleration of the guide rod (304) is zero, then it is judged that the trigger pressure difference of the breather valve is smaller, and if the instantaneous acceleration of the guide rod (304) starts to increase after the instantaneous acceleration of the guide rod (304) is zero, then it is judged that the trigger pressure difference of the breather valve is larger.
2. An on-line check device for a respiratory valve as claimed in claim 1, wherein said calculating the effective weight of the piston (207) based on the trigger pressure difference comprises:
calculating preset pressure to be reached by a pressure difference cylinder (201) according to the trigger pressure difference of the breather valve to be detected:wherein->For a preset pressure to be reached by the pressure difference cylinder (201), -a pressure difference cylinder (201) is provided with a pressure sensor>For triggering the pressure difference of the breathing valve, +.>Is the pressure of the accumulator tank;
calculating an effective weight of the piston (207) from the preset pressure:wherein->Is an effective weight of the piston (207),the preset pressure to be reached by the differential pressure cylinder (201) is s, and the stress area of the piston (207).
3. An on-line check device for a breather valve according to claim 2, wherein the calculating of the preset deformation amount of the compression spring (213) according to the calculated effective weight of the piston (207) comprises:the method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>An effective weight for the piston (207); />Is the weight of the balancing weight (208), the piston (207) and the moving rack (206); />Is the friction factor between the friction plate (211) and the friction wheel (220); k is the spring constant of the compression spring (213); x is the deformation of the compression spring (213); f is the friction force between the piston (207) and the inner wall of the differential pressure cylinder (201).
4. The online verification device for the breather valve according to claim 1, wherein the driving mechanism comprises a driving shaft (219) arranged on the inner wall of the differential pressure cylinder (201), a driving gear (218) is arranged on the driving shaft (219), a thrust rack (217) is connected to the driving gear (218) in a meshed mode, a mounting cylinder (216) is sleeved outside the thrust rack (217), the mounting cylinder (216) is fixedly arranged on the inner wall of the differential pressure cylinder (201), and the thrust rack (217) is fixedly connected with the spring seat (214).
5. The online check device of a breather valve according to claim 1, wherein the calculating unit (403) is configured to calculate the instantaneous speeds of the guide rod (304) at different moments according to a plurality of instantaneous electromotive force values, respectivelyComprising the following steps:，/>.../>wherein->For the instantaneous electromotive force values generated by the guide rod (304) at different moments, b is the magnetic induction intensity of the magnetic force field (305),lcutting an effective length of the magnetic force field (305) for the guide rod (304); the calculating unit (403) is further adapted to calculate the instantaneous acceleration of the guiding rod (304) at different moments according to the instantaneous speed of the guiding rod (304) at different moments, < >>，/>.../>Wherein->Is the initial speed of the guide rod (304); the judgment unit (404) judges +.>＜/>，/>＜/>.../>＜/>Whether the two time periods are all established or not, if so, judging that the breather valve is not triggered, and if not, judging that the breather valve is triggered.
6. The online checking device for a breather valve according to claim 5, wherein the signal transmission unit (402) controls the driving mechanism to press the compression spring (213) for stopping the pitch gear (209) when the judging unit (404) judges that the instantaneous acceleration of the guide rod (304) is zero or the breather valve is triggered.
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