CN112113727A - Valve detection apparatus and valve detection method - Google Patents
Valve detection apparatus and valve detection method Download PDFInfo
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- CN112113727A CN112113727A CN202011038495.9A CN202011038495A CN112113727A CN 112113727 A CN112113727 A CN 112113727A CN 202011038495 A CN202011038495 A CN 202011038495A CN 112113727 A CN112113727 A CN 112113727A
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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
- G01M3/28—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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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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- Examining Or Testing Airtightness (AREA)
Abstract
A valve detection apparatus includes a first sealing portion, a second sealing portion, a clamping device, a pressurizing device, an air pressure detection device, and a pressure detection device. Valve check out test set can detect the leakproofness of valve to can also detect valve check out test set and wait the leakproofness between the valve that detects, avoid influencing the result that valve leakproofness detected because of valve check out test set and wait to detect the sealed not tight between the valve, improve the authenticity and the reliability of valve leakproofness testing result. The valve detection method adopts the valve detection equipment, so that the measured valve tightness result is more real and reliable.
Description
Technical Field
The invention relates to the field of mechanical detection, in particular to valve detection equipment and a valve detection method.
Background
The valve is a common part and is used for switching on and off a pipeline in a pneumatic system or a hydraulic system.
The valve is required to be subjected to a sealing test after the valve leaves a factory and is disassembled and maintained by using the valve, and the valve can be installed and used after the sealing test is qualified.
The existing valve detection is manually finished by workers, for example, 1 flange is connected at one end of a valve flange, gas is introduced to the flange for pressurizing, water is poured into the other end of the valve flange, and whether bubbles exist or not is checked to judge whether the valve leaks inwards; and additionally arranging flange pieces at two ends of the valve simultaneously, introducing gas, and testing whether the valve leaks outwards by using soapy water.
In the process of connecting the valve flange and the sealing flange, sliding dislocation between the valve flange and the sealing flange due to non-uniform pretightening force of the bolts is possible to occur, namely, sealing is not realized between the valve flange and the sealing flange, so that the result obtained by detecting the sealing performance of the valve is inaccurate, and the real sealing effect of the valve cannot be reflected.
Disclosure of Invention
The invention aims to provide valve detection equipment which can detect the sealing performance of a valve and can also detect the sealing performance between the valve detection equipment and the valve to be detected, so that the influence on the detection result of the sealing performance of the valve due to the poor sealing performance between the valve detection equipment and the valve to be detected is avoided, and the authenticity and the reliability of the detection result of the sealing performance of the valve are improved.
Another object of the present invention is to provide a valve testing method, which uses the above valve testing apparatus, so that the measured valve tightness result is more real and reliable.
The invention is realized by the following steps:
a valve detection apparatus includes a first sealing portion, a second sealing portion, a clamping device, a pressurizing device, an air pressure detection device, and a pressure detection device; the first sealing part comprises a sealing surface for sealing a tested valve to be detected, and the second sealing part comprises a sealing surface for sealing the tested valve; the clamping device is respectively in driving connection with the first sealing part and the second sealing part and is used for driving the first sealing part and the second sealing part to approach or depart from each other; the pressurizing device comprises a first pressurizing air path and a second pressurizing air path, wherein the sealing surface of the first sealing part is provided with an air vent communicated with the first pressurizing air path, and the sealing surface of the second sealing part is provided with an air vent communicated with the second pressurizing air path; the air pressure detection device comprises a first detection air path and a second detection air path, wherein the sealing surface of the first sealing part is provided with an air vent communicated with the first detection air path, and the sealing surface of the second sealing part is provided with an air vent communicated with the second detection air path; the pressure detection device is connected with the clamping device and is used for detecting output forces of the clamping device to the first sealing portion and the second sealing portion respectively.
When the valve detection equipment is used for detecting the valve, the pressure device can be used for pressurizing the interior of the valve to be detected, the air pressure detection device is used for detecting the valve to be detected, whether the valve to be detected leaks or not is judged according to the result of the air pressure detection device, in addition, the pressure detection device is used for detecting the output force of the clamping device, namely the pressing force applied to the valve to be detected, and whether the sealing between the clamping device and the valve to be detected is tight or not can be judged through the change of the pressing force, so that the detection result of the valve to be detected is prevented from being influenced due to the fact that the sealing between the clamping device and the valve to be detected is not tight, and the authenticity and.
In a preferred technical scheme of the invention, a sealing surface of the first sealing part is provided with a first vent, and a sealing surface of the second sealing part is provided with a second vent; the valve detection equipment further comprises a first combination gas circuit and a second combination gas circuit, the first combination gas circuit is communicated with the first vent, the second combination gas circuit is communicated with the second vent, the first pressurization gas circuit and the first detection gas circuit are communicated with the first vent through the first combination gas circuit, and the second pressurization gas circuit and the second detection gas circuit are communicated with the second vent through the second combination gas circuit.
In a preferred technical scheme of the invention, the pressurizing device further comprises an air pump, the first pressurizing air path and the second pressurizing air path are both communicated with an outlet of the air pump, the first pressurizing air path is provided with a first pressurizing air path valve, and the second pressurizing air path is provided with a second pressurizing air path valve.
In a preferred technical scheme of the invention, the pressurizing device further comprises a valve switch air passage, the valve switch air passage is used for being communicated with the pressure switch of the detected valve, and a valve switch air passage valve is arranged on the valve switch air passage.
A valve detection method which adopts the valve detection device comprises the following steps: respectively plugging two ports of a tested valve by using a first sealing part and a second sealing part of the valve testing equipment; applying pressure to the first seal portion and/or the second seal portion using a clamping device of the valve testing apparatus such that the first seal portion and the second seal portion clamp the tested valve; keeping the checked valve in a closed state, and pressurizing a valve cavity of the checked valve through a first detection air passage or a second detection air passage of an air pressure detection device of the valve detection equipment; the first detection gas circuit of the gas pressure detection device of the valve detection equipment detects the gas pressure of one valve cavity of the detected valve, the second detection gas circuit of the gas pressure detection device detects the gas pressure of the other valve cavity of the detected valve, and whether the detected valve leaks or not is judged according to the gas pressure detection result.
In a preferred technical scheme of the invention, after a first pressurizing gas circuit or a second pressurizing gas circuit of an air pressure detection device of the valve detection equipment pressurizes a valve cavity of a detected valve, the air pressure of the pressurized valve cavity of the detected valve is detected through the first detection gas circuit or the second detection gas circuit, and when the air pressure reaches a preset value, the air pressure detection device is stopped from pressurizing and the pressure of the pressurized valve cavity of the detected valve is maintained; judging whether the checked valve leaks internally according to the air pressure detection result comprises the following steps: if the pressure of the pressurized valve cavity of the tested valve is reduced and the pressure of the other valve cavity is increased, the internal leakage of the tested valve from one valve cavity to the other valve cavity is judged.
In a preferred embodiment of the present invention, the valve detection method further includes: if the pressure of the pressurized valve cavity of the detected valve is reduced and the pressure of the other valve cavity is not increased, detecting the output force of the clamping device by a pressure detection device of the valve detection equipment; if the output force of the clamping device is weakened, judging that the first sealing part or the second sealing part and the tested valve are not clamped; and if the output force of the clamping device is not changed, judging that the gas path of the valve detection equipment has leakage.
In a preferred embodiment of the present invention, the valve detection method includes: respectively plugging two ports of a tested valve by using a first sealing part and a second sealing part of the valve testing equipment; applying pressure to the first seal portion and/or the second seal portion using a clamping device of the valve testing apparatus such that the first seal portion and the second seal portion clamp the tested valve; keeping the checked valve in an open state, and pressurizing the inner cavity of the checked valve through a first pressurizing air circuit and/or a second pressurizing air circuit of a pressurizing device of the valve detection equipment; the air pressure of the inner cavity of the detected valve is detected through a first detection air path and a second detection air path of an air pressure detection device of the valve detection equipment respectively, and whether the detected valve leaks or not is judged according to an air pressure detection result.
In a preferred technical scheme of the invention, after a first pressurizing air path and/or a second pressurizing air path of a pressurizing device of valve detection equipment is/are used for pressurizing an inner cavity of a detected valve, the air pressure of the inner cavity of the detected valve is detected through a first detection air path and a second detection air path, and when the pressure of the first detection air path and the pressure of the second detection air path are equal and reach a set value, the pressurizing of the air pressure detection device is stopped and the pressure of the inner cavity of the detected valve is maintained; judging whether the detected valve leaks according to the air pressure detection result comprises the following steps: and if the pressure detected by the first detection gas circuit and the second detection gas circuit is not reduced within the preset time, judging that the detected valve does not leak.
In a preferred embodiment of the present invention, the valve detection method further includes: if the pressure detected by the first detection gas circuit and the second detection gas circuit is reduced, detecting the output force of the clamping device through a pressure detection device of the valve detection equipment; if the output force of the clamping device is weakened, judging that the first sealing part or the second sealing part and the tested valve are not clamped; and if the output force of the clamping device is not changed, judging that the gas path of the valve detection equipment has leakage.
The invention has the following beneficial effects: valve check out test set can detect the leakproofness of valve to can also detect valve check out test set and wait the leakproofness between the valve that detects, avoid influencing the result that valve leakproofness detected because of valve check out test set and wait to detect the sealed not tight between the valve, improve the authenticity and the reliability of valve leakproofness testing result. The valve detection method adopts the valve detection equipment, so that the measured valve tightness result is more real and reliable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of an embodiment of the valve detection apparatus of the present invention;
FIG. 2 is a schematic diagram of the oil and gas circuits of an embodiment of the valve detection apparatus of the present invention;
FIG. 3 is a schematic view of the mounting relationship of the piston of an embodiment of the valve sensing apparatus of the present invention;
FIG. 4 is a schematic diagram of a control cabinet of an embodiment of the valve detection apparatus of the present invention.
In the figure:
110-a first seal; 111-a first vent; 112-a first joint; 120-a second seal; 121-a second vent; 122-a second joint; 210-a first piston; 211-first pressurized oil circuit; 212-a first pressurized oil circuit valve; 213-a first oil pressure transmitter; 214-first oil return path; 215-first return oil circuit valve; 216-first merging oil path; 220-a second piston; 230-an oil pump; 240-oil tank; 250-a liquid level meter; 260-mounting grooves; 301-a first pressurized gas circuit; 311-a first pressurized gas path valve; 302-a second pressurized gas circuit; 321-a second pressurized gas path valve; 303-valve switching gas circuit; 331-valve switching gas circuit valve; 332-a third pneumatic transducer; 333-pressure reducing valve; 401-a first detection gas path; 411 — first detection gas circuit valve; 412-a first pneumatic transmitter; 402-a second detection gas path; 421-second detection gas path valve; 422-a second pneumatic transmitter; 501-a first merging gas path; 502-a second merging gas path; 601-outputting a gas circuit; 603-output gas path valve; 602-pressure relief gas circuit; 604-relief air circuit valve; 610-an air pump; 620-gas box; 621-filter screen; 710-a travel guide; 720-a translation motor; 730-a lifting motor; 740-hanging hooks; 800-control cabinet; 810-upper cabinet door; 820-lower cabinet door; 811-touch screen; 900-tested valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The present invention provides a valve inspection apparatus including a first sealing part 110, a second sealing part 120, a clamping device, a pressurizing device, an air pressure detecting device, and a pressure detecting device.
Fig. 1 to 4 show an embodiment of a valve detecting apparatus, in which a clamping device includes a first piston 210 and a second piston 220 that are oppositely disposed, an end of the first piston 210 is provided with a first sealing portion 110, an end of the second piston is provided with a second sealing portion 120, and the first piston 210 and the second piston 220 can drive the first sealing portion 110 and the second sealing portion 120 to approach or separate from each other, thereby clamping a valve 900 to be detected.
The valve 900 to be tested is an air valve, the valve detection device comprises a hoisting device, as shown in fig. 1, the hoisting device comprises a traveling guide rail 710, a translation motor 720, a lifting motor 730 and a hook 740, wherein the hook 740 is used for being connected with the valve 900 to be tested, the lifting motor 730 is used for driving the hook 740 to move up and down, and the translation motor 720 is used for driving the lifting motor 730 and the hook 740 to move along the traveling guide rail 710.
The hoisting device is used for moving the valve 900 to be tested, moving the valve 900 to be tested to a position between the first sealing part 110 and the second sealing part 120, and then driving the first sealing part 110 and the second sealing part 120 by the first piston 210 and the second piston 220 to clamp two ports of the valve 900 to be tested, so that the valve 900 to be tested is in a state to be tested.
The clamping device further comprises an oil tank 240 and an oil pump 230 for providing hydraulic power to the piston rod, wherein a level gauge 250 is arranged in the oil tank 240.
Fig. 2 shows the hydraulic oil path of the first piston 210, wherein the oil pump 230 takes oil from the oil tank 240, pressurizes the oil, and outputs the oil to the first pressurizing oil path 211, the first pressurizing oil path 211 is provided with a first pressurizing oil path valve 212, the first pressurizing oil path 211 is communicated with the first merging oil path 216, and the first merging oil path 216 is communicated with the first piston 210.
The first merging oil passage 216 is connected to the first pressurizing oil passage 211 and the first oil return passage 214 by a tee joint, the first oil return passage 214 is connected to the tank 240, and the first oil return passage 214 is provided with a first oil return passage valve 215.
When the first piston 210 is driven to move toward the second piston 220, the first return oil path valve 215 is closed, the first pressurizing oil path valve 212 is opened, and the hydraulic oil output from the oil pump 230 enters the first piston 210 through the first pressurizing oil path 211 and the first combining oil path 216, thereby driving the first piston 210 to move.
When the detection is completed, the first return oil path valve 215 is opened, the first pressurizing oil path valve 212 is closed, and the pressure oil in the first piston 210 returns to the tank 240 through the first merging oil path 216 and the first return oil path 214, thereby releasing the force of the first piston 210.
The oil path of the second piston 220 is the same as that of the first piston 210, and thus, will not be described again.
Fig. 3 shows an installation manner of the second piston 220, in which a semicircular installation groove 260 is formed on the installation surface, a part of the second piston 220 is inserted into the installation groove 260, and the second piston 220 is fixed on the installation surface by a fixing member, thereby fixing the second piston 220.
The first piston 210 is mounted in the same manner as the second piston 220.
The pressure detecting means includes a first oil pressure transmitter 213 provided on the first pressurizing oil passage 211, and the first oil pressure transmitter 213 is provided at a position downstream of the first pressurizing oil passage valve 212, so that the first oil pressure transmitter 213 can reflect the oil pressure in the first piston 210 after the first pressurizing oil passage valve 212 is closed, thereby obtaining the thrust of the first piston 210, i.e., the pressure applied by the first piston 210 to the valve 900 to be measured.
Similarly, the pressure detection device further includes a second oil pressure transmitter for detecting the oil pressure in the second piston 220, which is not shown in the drawing.
The first sealing portion 110 and the second sealing portion 120 are both flange plates for sealing ports of the valve 900 to be tested.
A first vent hole 111 is formed in the sealing surface of the first sealing part 110, a first joint 112 is formed in the side surface of the first sealing part 110, and the first vent hole 111 is communicated with the first joint 112; a sealing surface of the second sealing portion 120 is provided with a second vent 121, a side surface of the second sealing portion 120 is provided with a second joint 122, and the second vent 121 and the second joint 122 are communicated.
A through hole with the diameter of phi 8mm is arranged in the first sealing part 110, and two ends of the through hole are respectively communicated with the first air vent 111 and the first joint 112; a through hole with a diameter of phi 8mm is arranged in the second sealing part 120, and two ends of the through hole are respectively communicated with the second vent 121 and the second joint 122.
The pressurizing device is used for pressurizing the valve cavity of the valve 900 to be tested, and the specific structure is shown in fig. 2.
The pressurizing means includes an air pump 610 and an air tank 620, wherein a filter net 621 is provided in the air tank 620 to filter air introduced into the air pump 610.
The air pump 610 is communicated with the output air path 601, and the output air path 601 is provided with an output air path valve 603.
The air box 620 is connected to the pressure relief air channel 602, and the pressure relief air channel 602 is provided with a pressure relief air channel valve 604.
The output air path 601 and the pressure relief air path 602 are connected to one end of the middle air path through a tee joint, and the other end of the middle air path is connected to the first pressurizing air path 301 and the second pressurizing air path 302 through a tee joint, respectively.
The first pressurizing air path 301 is provided with a first pressurizing air path valve 311, the first pressurizing air path 301 is connected with a first combining air path 501, and the first combining air path 501 is connected with a first joint 112 on the side surface of the first sealing part 110, so that the first pressurizing air path 301 is communicated with the first air vent 111; the second pressurizing air path 302 is provided with a second pressurizing air path valve 321, the second pressurizing air path 302 is connected with a second combining air path 502, and the second combining air path 502 is connected with a second joint 122 on the side surface of the second sealing part 120, so that the second pressurizing air path 302 is communicated with the second vent 121.
The first combining air path 501 is connected with the first connector 112 through an 1/2 NPT-phi 10mm quick connector, and the second combining air path 502 is connected with the second connector 122 through a 1/2 NPT-phi 10mm quick connector.
When the left chamber of the valve to be tested 900 needs to be pressurized, the output air path valve 603 is opened, the pressure relief air path valve 604 is closed, the first pressurization air path valve 311 is opened, and the second pressurization air path valve 321 is closed, so that the pressure air output by the air pump 610 enters the first sealing part 110 through the output air path 601, the middle air path, the first pressurization air path 301 and the first combination air path 501, and enters the left chamber of the valve to be tested 900 from the first air vent 111 of the first sealing part 110.
When the left chamber of the valve 900 to be tested needs to be decompressed, the output air path valve 603 is closed, the decompression air path valve 604 is opened, the first pressurization air path valve 311 is opened, and the second pressurization air path valve 321 is closed, so that the pressure air in the left chamber of the valve 900 to be tested enters the air box 620 through the first merging air path 501, the first pressurization air path 301, the middle air path and the decompression air path 602.
The method of pressurizing and depressurizing the right chamber of the valve 900 to be tested is similar to the method of pressurizing and depressurizing the left chamber of the valve 900 to be tested, please refer to the above method.
The air pressure detection device comprises a first detection air path 401 and a second detection air path 402, wherein the first detection air path 401 is respectively communicated with a first pressurization air path 301 and a first combination air path 501 through a tee joint, and the second detection air path 402 is respectively communicated with a second pressurization air path 302 and a second combination air path 502 through a tee joint.
The first detection gas path 401 is provided with a first detection gas path valve 411 and a first gas pressure transmitter 412; the second detection air path 402 is provided with a second detection air path valve 421 and a second air pressure transmitter 422.
When the first detection gas circuit valve 411 is opened, the first gas pressure transmitter 412 is communicated with the first pressurization gas circuit 301 through the first detection gas circuit 401, that is, the pressure in the first pressurization gas circuit 301 can be detected, and then the pressure in the left chamber of the valve to be detected 900 is obtained.
Similarly, the second air pressure transducer 422 is used to sense the pressure within the right chamber of the valve under test 900.
As shown in fig. 2, the valve detection device further includes a valve switch air path 303, the valve switch air path 303 is communicated with the intermediate air path, and a valve switch air path valve 331, a pressure reducing valve 333 and a third air pressure transmitter 332 are sequentially disposed on the valve switch air path 303.
The valve switching gas circuit 303 is used to connect a pressure feedback port of the valve 900 to be tested, that is, when the valve 900 to be tested is a pressure feedback valve, the valve detection device may open or close the valve 900 to be tested through the valve switching gas circuit 303 to control the valve 900 to be tested.
The valve detection device of the present invention further includes a control cabinet 800, as shown in fig. 4, the control cabinet 800 includes an upper cabinet door 810 and a lower cabinet door 820, wherein the upper cabinet door 810 is provided with a touch screen 811, and the lower cabinet door 820 is provided with a plurality of control buttons.
The touch screen 811 is provided with an operation UI of the gas circuit and the liquid circuit of the valve detection device, and the gas circuit and the liquid circuit of the valve detection device are operated by a plurality of operation keys. The operation keys specifically include: the system comprises an oil pump switch, an air pump switch, a left air electromagnetic valve No. 1, a right air electromagnetic valve No. 1, a left air electromagnetic valve No. 2, a right air electromagnetic valve No. 2, an oil loading electromagnetic valve, an oil unloading electromagnetic valve, a total air loading electromagnetic valve, a total air unloading electromagnetic valve, a valve switch battery valve, a 24VDC power input, a regulating valve opening degree control and an oil pressure unloading electric regulating valve. In addition, the touch screen 811 further has a plurality of data display windows for displaying operation data of the valve detection device, and the display windows specifically include: the oil pressure display window, the left air pressure display window, the right air pressure display window, the valve air pressure display window and the oil liquid level display window.
The "oil pump on" operation button is used for controlling the oil pump 230 to start operation, and the "oil pump off" operation button is used for controlling the oil pump 230 to stop operation; the 'air pump on' operation key is used for controlling the air pump 610 to start and operate; the "air pump off" operation button is used for controlling the air pump 610 to stop running; the operation key of 'left air solenoid valve No. 1' is used for controlling the opening of the first pressurizing air path valve 311; the operation key of 'right gas solenoid valve No. 1' is used for controlling the opening of the second pressurizing gas path valve 321; the operation key of 'left air solenoid valve No. 2' is used for controlling the closing of the first pressurizing air path valve 311; the operation key of 'right gas solenoid valve No. 2' is used for controlling the closing of the second pressurizing gas path valve 321; the "oil-loading solenoid valve" is used to control the first pressurizing oil path valve 212 to open and control the first oil return path valve 215 to close, so that the first pressurizing oil path 211 is conducted; the "oil unloading solenoid valve" is used to control the first pressurizing oil path valve 212 to close and control the first oil return path valve 215 to open, i.e., to conduct the first oil return path 214; the 'total gas loading electromagnetic valve' is used for controlling the output gas path valve 603 to be opened and controlling the pressure relief gas path valve 604 to be closed, so that the output gas path 601 is conducted; the "total gas unloading solenoid valve" is used to control the output gas path valve 603 to close and control the pressure relief gas path valve 604 to open, so that the pressure relief gas path 602 is conducted; the "master gas valve switch battery valve" is used for controlling the valve switch air path valve 331 to open or close, so as to turn on or off the valve switch air path 303; the 24VDC power input is used for being connected with an electric control port of the tested valve 900 and controlling the tested valve 900 to be opened or closed; "regulator valve opening degree control" is used to control the opening degree of the pressure reducing valve 333, thereby regulating the output pressure of the regulator valve opening and closing gas circuit 303; "oil pressure uninstallation electrical control valve" is used for controlling the aperture of first return oil way valve for oil pressure release process is steady to be gone on, avoids leading to oil tank 240 to damage because pressure is too big.
The "oil pressure display window" is used to display the pressure value measured by the first oil pressure transmitter 213; the "left air pressure display window" is used for displaying the pressure value measured by the first air pressure transmitter 412; the "right air pressure display window" is used for displaying the pressure value measured by the second air pressure transmitter 422; the "valve air pressure display window" is used for displaying the pressure value measured by the third air pressure transmitter 332; the "oil level display window" is used to display the information on the liquid level measured by the liquid level meter 250.
In this embodiment, the control of the hoisting device is realized by a plurality of control buttons on the lower cabinet door 820, that is, the translation and the lifting of the hook 740 are realized; the control of the clamping device and the pressing device is realized by a touch screen 811, the touch screen 811 performs human-computer interaction, and the detection results are also reflected on the touch screen 811.
As shown in fig. 4, the plurality of control buttons on the lower cabinet door 820 are divided into two rows, i.e., an upper row, four rows, and a lower row, two rows. The four control buttons on the upper row are respectively an ascending button, a descending button, a left-going button and a right-going button from left to right, the ascending button is responsible for controlling the hook 740 to move upwards, the descending button is responsible for controlling the hook 740 to move downwards, the left-going button is responsible for controlling the hook 740 to move leftwards, and the right-going button is responsible for controlling the hook 740 to move rightwards. The two buttons at the lower row are a forward button at the left side and a backward button at the right side, respectively, for controlling the forward and backward movement of the hook 740.
In this embodiment, the gas paths inside the device are made of stainless steel tubes with a diameter of 10mm, and the gas paths outside the device are made of transparent nylon hoses.
The invention also provides a valve detection method, which adopts the valve detection device and comprises the following steps: the first sealing part 110 and the second sealing part 120 of the valve detection device are used for respectively sealing off two ports of the tested valve 900; applying pressure to the first sealing part 110 and/or the second sealing part 120 using a clamping device of the valve inspection apparatus such that the first sealing part 110 and the second sealing part 120 clamp the inspected valve 900; keeping the checked valve 900 in a closed state, and pressurizing a valve cavity of the checked valve 900 through a first detection gas path 401 or a second detection gas path 402 of an air pressure detection device of the valve detection equipment; the first detection gas circuit 401 of the gas pressure detection device of the valve detection device detects the gas pressure in one valve cavity of the detected valve 900, the second detection gas circuit 402 of the gas pressure detection device detects the gas pressure in the other valve cavity of the detected valve 900, and whether the detected valve 900 leaks or not is judged according to the gas pressure detection result.
Whether the inner leakage of the detection valve occurs specifically comprises left chamber inner leakage detection and right chamber inner leakage detection.
The left chamber internal leakage detection method comprises the following steps:
after the left valve cavity of the tested valve 900 is pressurized by the first pressurizing air channel 301 of the air pressure detection device of the valve detection equipment, the air pressure of the pressurized left valve cavity of the tested valve 900 is detected by the first detecting air channel 401, and when the air pressure reaches a preset value, for example, 6bar to 9bar, the pressurization of the air pressure detection device is stopped and the pressure of the pressurized valve cavity of the tested valve 900 is maintained; if the pressure of the pressurized valve chamber of the subject valve 900 decreases and the pressure of the right valve chamber increases, it is determined that there is an internal leakage from the left valve chamber to the right valve chamber of the subject valve 900.
In the left chamber internal leakage detection process, if the pressure of the pressurized left valve chamber of the subject valve 900 is reduced and the pressure of the right valve chamber is not increased, the output force of the clamping device is detected by the pressure detection device of the valve detection apparatus; if the output force of the clamping device is weakened, it is determined that the first sealing portion 110 or the second sealing portion 120 and the check valve 900 are not clamped; and if the output force of the clamping device is not changed, judging that the gas path of the valve detection equipment has leakage.
The method of detecting the inner leakage of the right chamber is similar to that of the left chamber.
Whether the detection valve leaks specifically includes: the first sealing part 110 and the second sealing part 120 of the valve detection device are used for respectively sealing off two ports of the tested valve 900; applying pressure to the first sealing part 110 and/or the second sealing part 120 using a clamping device of the valve inspection apparatus such that the first sealing part 110 and the second sealing part 120 clamp the inspected valve 900; keeping the checked valve 900 in an open state, and pressurizing the inner cavity of the checked valve 900 through the first pressurizing air path 301 and/or the second pressurizing air path 302 of the pressurizing device of the valve detection equipment; the air pressure of the inner cavity of the detected valve 900 is detected through a first detection air path 401 and a second detection air path 402 of an air pressure detection device of the valve detection equipment respectively, and whether the detected valve 900 leaks or not is judged according to an air pressure detection result.
In this embodiment, a clamping device of the valve detection apparatus is used to apply simultaneous pressure to the first sealing portion 110 and the second sealing portion 120, connect the valve switching air path 303 with the feedback port of the tested valve 900, open the valve switching air path valve 331, apply pressure to the feedback port of the tested valve 900, and by adjusting the pressure reducing valve 333, when the pressure displayed by the third air pressure transducer 332 reaches a predetermined pressure value, for example, 3.5bar to 6bar, click the "24 VDC power output" button on the touch screen 811 to open the tested valve 900, or directly operate the tested valve 900 to open, so that the tested valve 900 is in an open state. After the inspected valve 900 is opened, the 24VDC power output is maintained, that is, the inspected valve 900 is maintained in an opened state, and then the valve opening/closing air passage valve 331 is closed, thereby closing the valve opening/closing air passage 303.
The first pressurizing air path 301 and the second pressurizing air path 302 of the air pressure detection device of the valve detection equipment simultaneously pressurize the inner cavity of the tested valve 900, and the display pressure of the first detection air path 401 and the second detection air path 402 is 6bar to 9 bar.
After the inner cavity of the inspected valve 900 is pressurized through the first pressurizing air path 301 and the second pressurizing air path 302 of the pressurizing device of the valve detection equipment, the air pressure of the inner cavity of the inspected valve 900 is detected through the first detection air path 401 and the second detection air path 402, and when the pressure of the first detection air path 401 and the pressure of the second detection air path 402 are equal and reach a set value, the pressurizing of the air pressure detection device is stopped and the pressure of the inner cavity of the inspected valve 900 is maintained; if the pressures detected by the first detection gas path 401 and the second detection gas path 402 are not reduced within the predetermined time, it is determined that the tested valve 900 does not leak.
If the pressures detected by the first detection gas path 401 and the second detection gas path 402 are reduced, detecting the output force of the clamping device through a pressure detection device of the valve detection equipment; if the output force of the clamping device is weakened, it is determined that the first sealing portion 110 or the second sealing portion 120 and the check valve 900 are not clamped; and if the output force of the clamping device is not changed, judging that the gas path of the valve detection equipment has leakage.
Therefore, by adopting the valve detection equipment provided by the invention, when the valve 900 to be detected is subjected to inner leakage detection and outer leakage detection, the valve detection equipment can also detect the sealing state of the valve detection equipment and the valve 900 to be detected, and can also detect the sealing state of the gas path of the valve detection equipment, so that the detection of the valve 900 to be detected is prevented from being interfered by untight sealing and gas path inner leakage, and the detection result is more real and reliable.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A valve detection apparatus, characterized by comprising a first seal portion (110), a second seal portion (120), a clamping device, a pressurizing device, an air pressure detection device, and a pressure detection device;
the first sealing portion (110) comprises a sealing surface for sealing a tested valve (900) to be detected, and the second sealing portion (120) comprises a sealing surface for sealing the tested valve (900);
the clamping device is respectively connected with the first sealing part (110) and the second sealing part (120) in a driving mode and used for driving the first sealing part (110) and the second sealing part (120) to move close to or away from each other;
the pressurizing device comprises a first pressurizing air path (301) and a second pressurizing air path (302), a vent hole communicated with the first pressurizing air path (301) is formed in the sealing surface of the first sealing part (110), and a vent hole communicated with the second pressurizing air path (302) is formed in the sealing surface of the second sealing part (120);
the air pressure detection device comprises a first detection air path (401) and a second detection air path (402), wherein a vent hole communicated with the first detection air path (401) is formed in the sealing surface of the first sealing part (110), and a vent hole communicated with the second detection air path (402) is formed in the sealing surface of the second sealing part (120);
the pressure detection device is connected with the clamping device and is used for detecting output forces of the clamping device to the first sealing part (110) and the second sealing part (120) respectively.
2. The valve detecting apparatus according to claim 1, wherein the first seal portion (110) has a first vent hole (111) in a sealing surface thereof, and the second seal portion (120) has a second vent hole (121) in a sealing surface thereof; valve check out test set still includes first combination gas circuit (501) and second combination gas circuit (502), first combination gas circuit (501) with first blow vent (111) intercommunication, second combination gas circuit (502) with second blow vent (121) intercommunication, first pressurization gas circuit (301) with first detection gas circuit (401) all pass through first combination gas circuit (501) with first blow vent (111) intercommunication, second pressurization gas circuit (302) with second detection gas circuit (402) all pass through second combination gas circuit (502) with second blow vent (121) intercommunication.
3. The valve detection apparatus according to claim 2, wherein the pressurization device further comprises an air pump (610), the first pressurization air path (301) and the second pressurization air path (302) are both communicated with an outlet of the air pump (610), the first pressurization air path (301) is provided with a first pressurization air path valve (311), and the second pressurization air path (302) is provided with a second pressurization air path valve (321).
4. The valve detection apparatus according to claim 1, wherein the pressurizing device further comprises a valve switch gas path (303) for communicating with a pressure switch of the valve under test (900), and a valve switch gas path valve (331) is disposed on the valve switch gas path (303).
5. A valve inspection method using the valve inspection apparatus according to any one of claims 1 to 4, the valve inspection method comprising:
respectively plugging two ports of the valve under test (900) using a first seal (110) and a second seal (120) of the valve testing apparatus;
applying pressure to the first seal (110) and/or the second seal (120) using a clamping device of the valve testing apparatus such that the first seal (110) and the second seal (120) clamp the valve under test (900);
keeping the checked valve (900) in a closed state, and pressurizing a valve cavity of the checked valve (900) through a first detection gas circuit (401) or a second detection gas circuit (402) of an air pressure detection device of the valve detection equipment;
the air pressure of one valve cavity of the detected valve (900) is detected through a first detection air path (401) of an air pressure detection device of the valve detection equipment, the air pressure of the other valve cavity of the detected valve (900) is detected through a second detection air path (402) of the air pressure detection device, and whether the detected valve (900) leaks or not is judged according to an air pressure detection result.
6. The valve detecting method according to claim 5,
after a valve cavity of the valve to be detected (900) is pressurized through a first pressurization gas circuit (301) or a second pressurization gas circuit (302) of an air pressure detection device of the valve detection equipment, the air pressure of the pressurized valve cavity of the valve to be detected (900) is detected through a first detection gas circuit (401) or a second detection gas circuit (402), and when the air pressure reaches a preset value, the pressurization of the air pressure detection device is stopped and the pressure of the pressurized valve cavity of the valve to be detected (900) is maintained;
judging whether the valve (900) is leaked according to the air pressure detection result comprises the following steps:
if the pressure of the pressurized valve cavity of the tested valve (900) is reduced and the pressure of the other valve cavity is increased, the tested valve (900) is judged to have internal leakage from one valve cavity to the other valve cavity.
7. The valve detection method of claim 6, further comprising:
if the pressure of the pressurized valve cavity of the valve (900) to be detected is reduced and the pressure of the other valve cavity is not increased, detecting the output force of the clamping device through the pressure detection device of the valve detection equipment;
if the output force of the clamping device is weakened, determining that the first sealing part (110) or the second sealing part (120) and the tested valve (900) are not clamped;
and if the output force of the clamping device is not changed, judging that the gas circuit of the valve detection equipment has leakage.
8. A valve inspection method using the valve inspection apparatus according to any one of claims 1 to 4, the valve inspection method comprising:
respectively plugging two ports of the valve under test (900) using a first seal (110) and a second seal (120) of the valve testing apparatus;
applying pressure to the first seal (110) and/or the second seal (120) using a clamping device of the valve testing apparatus such that the first seal (110) and the second seal (120) clamp the valve under test (900);
keeping the checked valve (900) in an open state, and pressurizing the inner cavity of the checked valve (900) through a first pressurizing air path (301) and/or a second pressurizing air path (302) of a pressurizing device of the valve detecting equipment;
the air pressure of the inner cavity of the detected valve (900) is detected through a first detection air path (401) and a second detection air path (402) of an air pressure detection device of the valve detection equipment respectively, and whether the detected valve (900) leaks or not is judged according to an air pressure detection result.
9. The valve detecting method according to claim 8,
after the inner cavity of the checked valve (900) is pressurized through a first pressurization air path (301) and/or a second pressurization air path (302) of a pressurization device of the valve detection equipment, the air pressure of the inner cavity of the checked valve (900) is detected through a first detection air path (401) and a second detection air path (402), and when the pressure of the first detection air path (401) and the pressure of the second detection air path (402) are equal and reach a set value, the pressurization of the air pressure detection device is stopped and the pressure of the inner cavity of the checked valve (900) is maintained;
judging whether the detected valve (900) leaks according to the air pressure detection result comprises the following steps:
and if the pressures detected by the first detection gas circuit (401) and the second detection gas circuit (402) are not reduced within a preset time, judging that the detected valve (900) does not leak.
10. The valve detection method of claim 9, further comprising:
if the pressures detected by the first detection gas circuit (401) and the second detection gas circuit (402) are reduced, detecting the output force of the clamping device through a pressure detection device of the valve detection equipment;
if the output force of the clamping device is weakened, determining that the first sealing part (110) or the second sealing part (120) and the tested valve (900) are not clamped;
and if the output force of the clamping device is not changed, judging that the gas circuit of the valve detection equipment has leakage.
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| CN202011038495.9A CN112113727A (en) | 2020-09-28 | 2020-09-28 | Valve detection apparatus and valve detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011038495.9A CN112113727A (en) | 2020-09-28 | 2020-09-28 | Valve detection apparatus and valve detection method |
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|---|---|---|---|---|
| CN201444106U (en) * | 2009-07-28 | 2010-04-28 | 鞍钢集团自动化公司 | Gas tightness detection device of balanced valve |
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Application publication date: 20201222 |