CN117804704B - Leak protection detection device is used in valve processing - Google Patents
Leak protection detection device is used in valve processing Download PDFInfo
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- CN117804704B CN117804704B CN202410223551.8A CN202410223551A CN117804704B CN 117804704 B CN117804704 B CN 117804704B CN 202410223551 A CN202410223551 A CN 202410223551A CN 117804704 B CN117804704 B CN 117804704B
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Abstract
The invention relates to the technical field of valve detection, in particular to a leakage-proof detection device for valve processing, which comprises: the first telescopic cylinder is fixedly arranged on the base, a first compression plate is fixedly arranged at the end part of a piston rod of the first telescopic cylinder, a positioning column is fixedly arranged on the inner side of the first compression plate, a first external connection pipe is arranged on the outer side of the first compression plate, and the first external connection pipe is communicated with the interior of the valve through the first compression plate; the valve is characterized by comprising a bending mechanism, wherein a second compression plate is arranged on the inner side of the bending mechanism, a positioning column is fixedly arranged on the inner side of the second compression plate, the bending mechanism drives the second compression plate to generate off-axis motion, the valve can bear the force deviating from an axis when the valve is subjected to leakage prevention detection through the arrangement of the bending mechanism, the valve is deformed, the actual use situation that the valve is subjected to off-axis force (force bending the valve) is simulated, and the tightness of the valve under the condition of off-axis force can be effectively detected after the valve is closed.
Description
Technical Field
The invention relates to the technical field of valve detection, in particular to a leakage-proof detection device for valve processing.
Background
The valve is a pipeline accessory for opening and closing a pipeline, controlling flow direction, adjusting and controlling parameters of a conveying medium, is a control component in a fluid conveying system, has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, splitting flow or overflow pressure relief and the like, and can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive mediums, slurry, oil products, liquid metal, radioactive mediums and the like.
In the process of installing an actual pipeline valve, because pipeline laying needs bending, multi-section pipeline connection and the like, the laying precision of the pipeline is limited, in many cases, two pipeline ports of the valve are required to be installed and are not in a completely aligned state, namely the axis of the pipeline is deviated, so that the pipeline is required to be forcibly broken into an aligned state when the valve is installed, the valve and the pipeline are smoothly connected, the valve after the installation is subjected to certain off-axis force, the valve is subjected to certain deformation, the valve is leaked (not tightly closed) and the like, and in the factory inspection of the valve, the leakage prevention detection of the valve is only carried out after two ports of the valve are extruded by a vertical valve flange, the constant pressure and pressure maintaining detection is carried out, the real service environment of the valve is difficult to simulate, the valve is qualified in the factory inspection, and the leakage problem occurs after the valve is installed on site.
Therefore, the leakage-proof detection device for valve processing can realize the sealing detection of the valve under the condition of bearing an off-axis force.
Disclosure of Invention
The invention aims to provide a leakage-proof detection device for valve processing, which is used for solving the valve detection problem in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: leak protection detection device is used in valve processing includes:
The first telescopic cylinder is fixedly arranged on the base, a first compression plate is fixedly arranged at the end part of a piston rod of the first telescopic cylinder, a positioning column is fixedly arranged on the inner side of the first compression plate, a first external connection pipe is arranged on the outer side of the first compression plate, and the first external connection pipe is communicated with the interior of the valve through the first compression plate;
the bending mechanism is connected with a second outer connecting pipe, the second outer connecting pipe is communicated with the inside of the valve through the second pressing plate, and the bending mechanism drives the second pressing plate to generate off-axis motion.
As the preferred scheme, the turn-buckle mechanism includes the roof pressure pipe, roof pressure pipe is hollow pipeline, roof pressure pipe one end fixed mounting second hold-down plate, roof pressure intraduct is inside to be switched on with the valve through second hold-down plate, roof pressure pipe other end fixed mounting limiting plate, limiting plate lateral surface slides the roof and leans on in the limiting ring medial surface, limiting ring internal diameter is less than limiting plate outside diameter, limiting ring passes through spacing support fixed mounting in the base, the limiting plate outside is equipped with the second takeover, the second takeover switches on with roof pressure intraduct, the eccentric column is installed in the limiting plate outside rotation, eccentric column fixed mounting is in the terminal surface in the fourth runner, the axis of eccentric column axis and fourth runner is parallel, the axis of eccentric column axis and fourth runner has interval L, and 0.0mm < L is less than or equal to 50.0mm, the fourth runner passes through motor drive and winds the fourth runner axis rotation, motor fixed mounting is in the base.
As an optimal scheme, the middle part of the jacking pipe is provided with a supporting ring, the jacking pipe is sleeved with the supporting ring, the supporting ring is installed on the jacking pipe through a rubber ring, and the supporting ring is fixedly installed on the base through a supporting bracket.
As the preferable scheme, the piston rod of the first telescopic cylinder slides and penetrates through the sliding hole block, and the sliding hole block is fixedly arranged on the base through the sliding hole bracket.
As the preferable scheme, the motor drives the fourth runner through drive mechanism, drive mechanism includes first runner, first runner fixed mounting is in the motor, motor fixed mounting is in the drive bracket, fourth runner and drive bracket rotate and are connected, first runner passes through the belt and is connected with fourth runner, drive bracket fixed mounting is in the base.
As the preferable scheme, first runner passes through speed reducing mechanism and is connected with the fourth runner, speed reducing mechanism includes the second runner, the second runner rotates to be installed in the drive bracket, the coaxial fixed mounting third runner of second runner, the diameter of second runner is greater than the diameter of third runner, first runner passes through the belt and is connected with the second runner, the third runner passes through the belt and is connected with the fourth runner.
As a preferable scheme, the first compacting plate is connected with a negative pressure tank through a hose, the internal pressure of the negative pressure tank is negative pressure relative to the internal air pressure of the side of the first compacting plate of the valve, the second compacting plate is connected with an air storage tank through the hose and a second air valve, the internal pressure of the air storage tank is positive pressure relative to the internal air pressure of the side of the second compacting plate of the valve, and the first air valve and the second air valve are opened simultaneously.
As the preferred scheme, leak protection detection device is used in valve processing still includes the gas and gushes out the mechanism, the gas gushes out the mechanism and includes the piston gas pitcher, piston gas pitcher one end is passed through the hose connection first pressure strip and is switched on with the valve is inside, the piston gas pitcher other end is passed through the hose connection second pressure strip and is switched on with the valve is inside, the inside slidable mounting gas slide plug of piston gas pitcher, gas slide plug keeps sealed with the piston gas pitcher, piston gas pitcher one end side is equipped with the flexible jar of second, the piston rod sliding seal of the flexible jar of second runs through the inside of going into the piston gas pitcher, gas slide plug fixed mounting is in the piston rod tip of the flexible jar of second, the flexible jar of second drives gas slide plug motion, the flexible jar fixed mounting of second is in the base.
Preferably, the end part of the positioning column is provided with threads, and the positioning column is provided with a nut after the valve is installed.
As the preferred scheme, the outside of first pressure strip and second pressure strip is equipped with the locking knot respectively, the locking knot includes the side piece, side piece fixed mounting is in first pressure strip and second pressure strip outside and part stretches out first pressure strip and second pressure strip outward flange respectively, side piece extension rotates and runs through the installation even post, just even the post can axial sliding, even post one end fixed mounting locking piece, even the other end of post rotates and installs in the cross axle, the cross axle eccentric mounting is in the circle commentaries on classics piece, circle commentaries on classics piece middle part has the clearance that holds even post motion, circle commentaries on classics piece side fixed mounting handle, be equipped with the rubber pad between circle commentaries on classics piece and the side piece.
Compared with the prior art, the invention provides a leakage-proof detection device for valve processing. The beneficial effects are as follows:
1. Through the setting of the bending mechanism, the valve can bear the force deviating from the axis when the valve is subjected to leak-proof detection, so that the valve is deformed, the actual use scene of the valve subjected to the off-axis force (the force for bending the valve) is simulated, the tightness of the valve under the condition of the off-axis force can be effectively detected after the valve is closed, and when the valve bears the off-axis force, the defects (such as cracks which do not penetrate the valve shell) of the valve shell can be amplified, so that the defects of the valve can be timely found.
2. By arranging the air surge mechanism, compared with the traditional constant-pressure-maintaining valve leakage-proof detection device, the device can simulate the pressure change of the front and back flowing media after the valve is closed, so that the valve bears the pressure detection with fluctuation, and the device is closer to the real use environment.
Drawings
FIG. 1 is a schematic diagram I of a valve structure according to the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of the structure of the bending mechanism, the transmission mechanism and the speed reducing mechanism of the application;
FIG. 4 is a schematic diagram II of the installation valve structure of the present application;
FIG. 5 is a schematic view of the drive bracket of FIG. 4 with the drive bracket removed;
FIG. 6 is a schematic illustration of the present application without a valve installed;
FIG. 7 is a partial enlarged view at B in FIG. 6;
FIG. 8 is a schematic view of a rubber ring according to an embodiment of the present application;
FIG. 9 is an enlarged view of a portion of FIG. 6 at C;
FIG. 10 is a front view of the present application;
FIG. 11 is a partial enlarged view at D in FIG. 10;
FIG. 12 is a schematic view of a fourth rotor and eccentric column according to the present application;
FIG. 13 is a partial cross-sectional view of a gas surge mechanism of the present application;
FIG. 14 is a schematic view I of the structure of the locking buckle of the present application;
FIG. 15 is a cross-sectional view of a locking buckle of the present application;
FIG. 16 is a schematic view II of the structure of the locking buckle of the present application;
FIG. 17 is a schematic view of a water-surrounding board structure according to the present application.
In the figure: 1. a base, a base seat and a base seat,
2. The first telescopic cylinder is provided with a first telescopic cylinder,
3. The first pressing plate is provided with a first pressing plate,
4. The positioning column is arranged on the upper surface of the positioning column,
5. The first external connection pipe is connected with the first external connection pipe,
6. A bending and twisting mechanism 601, a second compacting plate 602, a jacking pipe 603, a limiting plate 604, a limiting ring 6041, a limiting bracket 605 and an eccentric column,
7. A second external connection pipe is connected with the first external connection pipe,
8. The motor is provided with a motor,
9. A transmission mechanism 901, a first rotating wheel, 902 and a fourth rotating wheel,
10. A speed reducing mechanism 1001, a second rotating wheel 1002, a third rotating wheel,
11. The bracket is driven to be arranged on the frame,
12. A slide hole block 1201, a slide hole bracket,
13. A support ring 1301, a rubber ring 1302, a support bracket,
14. A gas surge mechanism, 1401, a piston gas tank, 1402, a second telescopic cylinder, 1403 and a gas sliding plug,
15. The hose is provided with a flexible pipe,
16. Locking buckle 1601, side block 1602, connecting column 1603, transverse shaft 1604, round rotating block 1605, operating handle 1606, locking block 1607, rubber pad,
17. And a water surrounding plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly attached, detachably attached, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in this document, relational terms such as first and second, third and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
It should be noted that, in this document, except for the specific description shown in the drawings, the "inner side" refers to the direction approaching the valve and the "outer side" refers to the direction separating from the valve.
Referring to fig. 1-17, the present invention provides a technical solution: leak protection detection device is used in valve processing includes:
the first embodiment has the leak-proof detection device of the bending mechanism 6.
The first telescopic cylinder 2 is fixedly installed on the base 1, it is to be noted that the base 1 may be a workbench, here the base 1 may refer to a part for installing the leak-proof detection device of the present application, the end portion of a piston rod of the first telescopic cylinder 2 is fixedly installed with the first compression plate 3, the first compression plate 3 clamps and loosens a detected valve through telescopic movement of the first telescopic cylinder 2, generally, two ends of the detected valve are provided with flanges, through holes for installing bolts are formed on the flanges, in order that the valve cannot rotate or slide relatively after contacting with the first compression plate 3, a positioning column 4 is fixedly installed on the inner side of the first compression plate 3, the positioning column 4 may be provided with a plurality of positioning columns 4 corresponding to the positions of the through holes of the valve flanges, after the valve is installed, the positioning column 4 of the first compression plate 3 is inserted into the through holes of the valve flanges, a first outer connection pipe 5 is arranged on the outer side of the first compression plate 3, the first outer connection pipe 5 is conducted with the valve through the first compression plate 3, and the first compression plate 3 is in sealing connection with the valve, and the first connection pipe 3 and the first connection pipe 5 is in sealing connection pipe or the sealing connection part is used for sealing the sealing connection with the valve;
Currently, valve detection: the valve is generally extruded in the direction perpendicular to the flange plates of the valve at two ends, so that the two ends of the valve are sealed, then the valve is pressurized to detect the leakage condition of the valve, but in the actual installation process of the valve, pipelines at the two ends of the valve generally have certain deviation, namely the axes of the pipelines have deviation, so that after the valve is installed, the valve needs to bear certain eccentric force, the valve is easy to deform, and in order to simulate the valve to bear the eccentric force, the valve leakage detection is closer to the actual use environment of the valve, and the leakage detection device provided by the application is provided with:
The bending mechanism 6, the inboard of bending mechanism 6 is equipped with second pressure strip 601, the inboard fixed mounting reference column 4 of second pressure strip 601, bending mechanism 6 is connected with second takeover 7 outward, second takeover 7 is switched on with the valve is inside through second pressure strip 601, sealing connection between its second pressure strip 601 and the valve, can set up parts such as sealing washer and/or sealing fin between second pressure strip 601 and the valve, and second takeover 7 is used for connecting outside air supply, for the inside pressurization of valve, bending mechanism 6 drive second pressure strip 601 produces the off-axis motion to make the valve receive off-axis motion power and take place certain deformation under the effect of second pressure strip 601, thereby reach the purpose of simulation valve true service environment.
In some embodiments, a specific structure of the bending mechanism 6 is provided, the bending mechanism 6 includes a pressing pipe 602, the pressing pipe 602 is a hollow pipe, and is used for passing gas, one end of the pressing pipe 602 is fixedly provided with a second pressing plate 601, the inside of the pressing pipe 602 is communicated with the inside of the valve through the second pressing plate 601, in order that the pressing pipe 602 can bear the extrusion force from the first pressing plate 3, the other end of the pressing pipe 602 is fixedly provided with a limiting plate 603, the outer side surface of the limiting plate 603 is slidably propped against the inner side surface of the limiting ring 604, the inner diameter of the limiting ring 604 is smaller than the outer diameter of the limiting plate 603, the limiting ring 604 is fixedly arranged on the base 1 through a limiting bracket 6041, the limiting plate 603 is limited to move away from the valve direction through the limiting ring 604, so that the pressing pipe 602 is ensured not to move outwards (in the direction away from the valve) when being stressed by the force away from the valve, further, when the limiting plate 603 moves eccentrically with the jacking pipe 602, the edge of the limiting plate 603 is always in contact with the limiting ring 604, that is, the limiting plate 603 and the limiting ring 604 have no gap in the axial direction of the jacking pipe 602, so that the circumference of the limiting plate 603 is always limited by the limiting ring 604, at this time, the limiting plate 603 is connected with the second compacting plate 601 through the jacking pipe 602, the jacking pipe 602 has a certain length, and can be elastically deformed, thus the phenomenon that the limiting plate 603 is directly connected with a valve to generate excessively rigid valve eccentric shaft movement when the limiting plate 603 moves eccentrically is avoided, that is, the elastic deformation of the jacking pipe 602 is utilized to form buffer to prevent the valve from being subjected to rigid impact, the second outer connecting pipe 7 is arranged outside the limiting plate 603, the second outer connecting pipe 7 is communicated with the inside of the jacking pipe 602, and an eccentric column 605 is rotatably arranged outside the limiting plate 603 for generating eccentric shaft movement, the eccentric column 605 is fixedly arranged on the inner end surface of the fourth rotating wheel 902, as shown in fig. 11 and 12, the axis of the fourth rotating wheel 902 is Y1-Y1, the axis of the eccentric column 605 is Y2-Y2, the axis of the eccentric column 605 is parallel to the axis of the fourth rotating wheel 902, the axis of the eccentric column 605 is provided with a distance L between the axis of the eccentric column 605 and the axis of the fourth rotating wheel 902, and 0.0mm < L < 50.0mm, preferably 0.0mm < L < 15.0mm, such as 1.0mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 11.0mm, 12.0mm, 13.0mm, 14.0mm and the like, more preferably 5.0mm < L < 10.0mm, such as 5.5mm, 6.0mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, and the like, and the valve values do not have obvious effects when the values L are not shown, the excessively large L value not only needs a motor 8 with larger torque to drive, but also can easily generate non-elastically deformed statue deformation when the valve is subjected to the movement of the excessively large off-axis force, so that the valve is damaged, L is controlled within a certain range, for example, 5.0mm is less than or equal to L is less than or equal to 10.0mm, the off-axis force can be effectively generated on the valve, the valve is not damaged, in addition, in the elastic deformation process, some invisible defects are amplified and developed (for example, cracks of a valve shell are not penetrated, and the valve is thoroughly cracked under the elastic deformation to cause air leakage or appearance) in the deformation process of the valve, the valve defects can be discovered as early as possible, the fourth runner 902 is driven to rotate around the fourth runner axis through the motor 902, and the motor 8 is fixedly arranged on the base 1.
Further, in order to obtain a better rotational connection position between the eccentric column 605 and the limiting plate 603, through experiments:
The rotation connection parts of the eccentric column 605 and the limiting plate 603 are respectively arranged on: the R value of the device is set according to the movement track of the limiting plate 603 and the size of the limiting ring 604, so that an experimental group in which the eccentric column 605 is gradually far away from the axis of the jacking pipe 602 is finally formed, after the same valve is installed, each parameter is kept consistent, and each experimental group rotates a fourth rotating wheel 902 with the same number of turns;
The experiment finds that: the abrasion at the rotating connection part of the eccentric column 605 and the limiting plate 603 is obviously proportional to the distance of the eccentric column 605 from the axis of the jacking pipe 602, and the local abrasion phenomenon also occurs between the limiting plate 603 and the limiting ring 604 along with the increase of the distance of the eccentric column 605 from the axis of the jacking pipe 602, so that the eccentric column 605 is preferably parallel to the axis of the jacking pipe 602, the distance between the axis of the eccentric column 605 and the axis of the jacking pipe 602 is not more than 100mm, and more preferably, the axis of the eccentric column 605 and the axis of the jacking pipe 602 are arranged in a collinear way, namely, the eccentric column 605 and the jacking pipe 602 are coaxial.
Furthermore, the jacking pipe 602 of the leak protection detection device is arranged in the air, that is, the jacking pipe 602 is connected with the eccentric column 605 to maintain the space position, so that in order to further increase the parts for supporting the jacking pipe 602, the stress of the eccentric column 605 is reduced, the supported parts do not influence the jacking pipe 602, the middle part of the jacking pipe 602 is provided with the supporting ring 13, the supporting ring 13 is sleeved on the jacking pipe 602, the supporting ring 13 is arranged on the jacking pipe 602 through the rubber ring 1301, the rubber ring 1301 can elastically deform, the jacking pipe 602 can extrude the rubber ring 1301 to keep the required movement after deformation, a certain force is required for explaining the elastic deformation of the rubber ring 1301, but the force required for the relative valve off-axis movement is negligible, but the rubber ring 1301 generates a supporting force for the jacking pipe 602, so that the jacking pipe 602 is not suspended any more, and as shown in fig. 8, the inner ring of the rubber ring 1301 is provided with teeth, and gaps between adjacent teeth, so that teeth of the rubber ring 1301 can flexibly deform through the adjacent teeth, and the supporting ring 1302 can be fixed on the base 1 through the supporting ring 1302.
In a preferred embodiment, in order to avoid the valve from affecting the first telescopic cylinder 2 when the valve is subjected to the off-axis motion, the piston rod of the first telescopic cylinder 2 is slid through the sliding hole block 12, the sliding hole block 12 allows the axial motion of the piston rod, but limits the motion of the piston rod in the vertical axial direction, the sliding hole block 12 is fixedly mounted on the base 1 through the sliding hole bracket 1201, the sliding hole block 12 and the sliding hole bracket 1201 effectively prevent the fluctuation of the piston rod of the first telescopic cylinder 2, and the loss or damage of the first telescopic cylinder 2 caused by the fluctuation of the piston rod is prevented.
Another embodiment: in the second embodiment, the bending mechanism 6 is driven by a transmission mechanism 9:
The transmission mechanism 9 is added in this embodiment, and the rest parts can be basically the same as those in the first embodiment, and will not be described again;
In order to detect the tightness of the valve, the device of the application needs to be placed in water, in order to avoid immersing the motor 8 in water, the motor 8 drives the fourth runner 902 through the transmission mechanism 9, the transmission mechanism 9 comprises a first runner 901, the first runner 901 is fixedly installed on the motor 8, the motor 8 is fixedly installed on the driving support 11, the fourth runner 902 is rotationally connected with the driving support 11, the first runner 901 is connected with the fourth runner 902 through a belt, the driving support 11 is fixedly installed on the base 1, the alternative scheme of the belt is provided with a chain, and preferably, belt transmission is selected, the belt has elasticity, the impact can be alleviated, the vibration can be reduced, the transmission is stable, the belt does not need lubricating oil especially when in water transmission, and can not rust, and can not pollute the water, more preferably, the belt adopts an asynchronous belt, for example: v-ribbed belts, V-belts, flat belts, etc., because the device of the application does not require strict transmission ratios, the non-synchronous belt can slip relative to the rotating wheel when the load is excessive, and the device can play a role of a protection device.
In a more preferred embodiment, in order to increase the torque of the motor 8 and reduce the rotation speed of the motor 8, the first rotating wheel 901 is connected with the fourth rotating wheel 902 through a speed reducing mechanism 10, the speed reducing mechanism 10 comprises a second rotating wheel 1001, the second rotating wheel 1001 is rotatably mounted on a driving bracket 11, a third rotating wheel 1002 is coaxially and fixedly mounted on the second rotating wheel 1001, the diameter of the second rotating wheel 1001 is larger than that of the third rotating wheel 1002, the first rotating wheel 901 is connected with the second rotating wheel 1001 through a belt, and the third rotating wheel 1002 is connected with the fourth rotating wheel 902 through a belt, so that low-speed and high-torque driving of the fourth rotating wheel 902 is realized.
Yet another embodiment: in a third embodiment, the device simulates the pressure change across the valve when the valve is closed:
Generally, after the valve is closed, a water hammer effect occurs at the upstream (the inflow end), the flowing medium causes larger impact on the valve under the action of inertia, so that the valve needs to bear larger pressure at the upstream, the flowing medium at the downstream (the outflow end) of the valve continuously moves downstream under the action of inertia, a negative pressure is generated on the valve, namely, the pressure at the downstream (the outflow end) of the valve is reduced, and a larger pressure difference is formed at two ends of the valve.
First, the hose 15 of the present application means: the flexible pipe can be freely bent and deformed, can be bent and deformed along with the position change of the connecting part, but can not influence the gas transmission in the flexible pipe 15, the inside of the flexible pipe 15 can bear positive pressure and negative pressure, the flexible pipe 15 adopts the conventional prior art in the field/industry, and the description is omitted.
The first hold-down plate 3 is connected with a first air valve (not shown in the figure) through a hose 15, a part for controlling the conduction between the air and the inside of the valve is connected with a negative pressure tank (not shown in the figure), the pressure in the negative pressure tank is negative to the air pressure in the side of the first hold-down plate 3 of the valve, the second hold-down plate 601 is connected with an air storage tank (not shown in the figure) through the hose 15 and a second air valve (not shown in the figure), the air pressure in the air storage tank is positive to the air pressure in the side of the second hold-down plate 601 of the valve, the first air valve and the second air valve are simultaneously opened, the side of the first hold-down plate 3 of the valve is defined as an outflow end, the side of the second hold-down plate 601 is defined as an inflow end, when the first air valve and the second air valve are simultaneously opened, the pressure in the outflow end of the valve is rapidly reduced, and the pressure in the inflow end of the valve is rapidly increased, when the valve is closed is imitated; on the contrary, the side of the first compacting plate 3 of the valve is defined as an inflow end, the side of the second compacting plate 601 is defined as an outflow end, the first compacting plate 3 is connected with a first air valve through a hose 15 to form an air storage tank, and the second compacting plate 601 is connected with a second air valve through the hose 15 to form a negative pressure tank.
The rest of the present embodiment may be substantially the same as the first embodiment or the second embodiment, and will not be described again.
Yet another embodiment: in the fourth embodiment, the present device adds an air surge mechanism 14:
The air-surging mechanism 14 is added in this embodiment, and the rest of the air-surging mechanism can be basically the same as that in the first embodiment or the second embodiment, and will not be described again;
in the third embodiment, the pressure change at two ends of the valve can be simulated only once, and the speed of the pressure change in the valve cannot be controlled, that is, the pressure change of the valve closed when the medium in the valve has different flow rates cannot be simulated, and the faster the speed of the flowing medium in the valve is, the faster the pressure change at two ends of the valve is when the valve is closed.
Thus, in this embodiment, the leak prevention detecting device for valve processing further includes a gas surge mechanism 14, the gas surge mechanism 14 includes a piston gas tank 1401, one end of the piston gas tank 1401 is connected to the first pressure plate 3 via a hose 15 and is communicated with the interior of the valve, the hose 15 may be connected to the first pressure plate 3 together with the first extension pipe 5 via a three-way valve, the other end of the piston gas tank 1401 is connected to the second pressure plate 601 via the hose 15 and is communicated with the interior of the valve, the hose 15 may be connected to the second pressure plate 601 together with the second extension pipe 7 via a three-way valve, a gas slide plug 1403 is slidably mounted in the piston gas tank 1401, the gas slide plug 1403 is kept sealed with the piston gas tank 1401, the positions where the two ends of the piston gas tank 1401 are connected to the hose 15 are located on both sides of the gas slide plug 1403, a second telescopic cylinder 1402 is provided on one end side of the piston gas tank 1401, the piston rod sliding seal of the second telescopic cylinder 1402 penetrates into the piston cylinder 1401, the piston rod end of the second telescopic cylinder 1402 is fixedly arranged on the piston rod end of the second telescopic cylinder 1402, the second telescopic cylinder 1402 drives the piston rod 1403 to move, the second telescopic cylinder 1402 is fixedly arranged on the base 1, after the valve is internally pressurized, the corresponding piston cylinder 1401 also has the same pressure, namely the pressure of one side of the piston rod 1403 connected with the first compression plate 3 is the same as the pressure of the inner side of the piston rod 3, the pressure of one side of the piston rod 1403 connected with the second compression plate 601 is the same as the pressure of the inner side of the piston rod 601, at the moment, the gas pressure of one side of the piston rod 1403 can be increased, the gas pressure of the other side of the piston rod 1403 can be reduced by moving the position of the piston rod 1403, and the pressure of the other side of the piston rod 1403 can be reduced, so that the pressure variation of the two ends of the valve can be realized, and the second telescopic cylinder 1402 controls the movement speed of the air slide plug 1403, so that the pressure change speed at two ends of the valve can be controlled, the pressure change speed of closing the valve when the medium in the valve is at different flow rates can be simulated, the second telescopic cylinder 1402 can control the air slide plug 1403 to slide for a plurality of times, the pressure change at two ends of the valve when the valve is closed can be simulated for a plurality of times, and obviously, the air burst mechanism 14 can also simulate the pressure change condition of liquid at two ends of the valve in a normal closing state.
Yet another embodiment: in the fifth embodiment, the structure of the fixed valve, the first compression plate 3 and the second compression plate 601 is added in the device:
in this embodiment, the rest may be substantially the same as the first, second, third or fourth embodiments, and will not be described again.
In order to increase the stability of the leak protection detection device in the leak protection detection of the valve, a structure for increasing the stability after the valve is installed is provided, the end part of the positioning column 4 is provided with threads, a nut is installed after the positioning column 4 is installed with the valve, and the valve, the first compacting plate 3 and the second compacting plate 601 are tightly compacted by the threaded connection of the nut and the positioning column 4.
In a more preferred embodiment, in order to quickly fix the valve and the first compression plate 3 and the second compression plate 601, as shown in fig. 2 and 14-16, the outer sides of the first compression plate 3 and the second compression plate 601 are respectively provided with locking buckles 16, and the locking buckles 16 may be provided with a plurality of, for example, 2,3, 4, etc., and may be circumferentially and uniformly distributed on the first compression plate 3 and the second compression plate 601, in some embodiments, in order to facilitate the operation of the locking buckles 16, the locking buckles 16 are disposed on the upper portions of the first compression plate 3 and the second compression plate 601, the locking buckles 16 comprise side blocks 1601, the side blocks 1601 are respectively fixedly mounted on the outer sides of the first compression plate 3 and the second compression plate 601 and partially extend out of the outer edges of the first compression plate 3 and the second compression plate 601, preferably, the side blocks 1601 and the first compression plate 3 and the second compression plate 601 are integrally formed, for example, directly extend out of the edges of the first compression plate 3 and the second compression plate 601, the extending part of the side block 1601 rotates to penetrate through the mounting connecting column 1602, the connecting column 1602 can axially slide, one end of the connecting column 1602 is fixedly provided with a locking block 1606, the other end of the connecting column 1602 is rotatably mounted on a transverse shaft 1603, the transverse shaft 1603 is eccentrically mounted on a circular rotating block 1604, a gap for accommodating the movement of the connecting column 1602 is formed in the middle of the circular rotating block 1604, an operating handle 1605 is fixedly mounted on the side surface of the circular rotating block 1604, when the circular rotating block 1604 is rotated by the operating handle 1605, the transverse shaft 1603 is placed at a position far away from the side block 1601, the connecting column 1602 drives the locking block 1606 to move towards the side block 1601, the locking block 1606 compresses a valve, the valve is kept in close contact with the first compressing plate 3 and the second compressing plate 601, when the valve needs to be released, the transverse shaft 1603 is placed at a position close to the side block 1601 by rotating the circular rotating block 1605 through the operating handle 1605, at the moment, the connecting rod drives the locking block 1606 to move towards a direction far away from the side block 1601, the locking piece 1606 releases the valve, rotates the locking piece 1606, makes its locking piece 1606 can not stop the valve and take off from first pressure strip 3, second pressure strip 601 or reference column 4, in order to increase the stability of locking 16, increase round rotating piece 1604 with the area of contact of side piece 1601, be equipped with rubber pad 1607 between round rotating piece 1604 and the side piece 1601, rubber pad 1607 can fixed mounting in side piece 1601.
In summary, when the device is used, the valves are all in a closed state, and when the valves are taken and placed, the first compression plate 3 and the second compression plate 601 are kept aligned, namely, the valves are not subjected to off-axis force in the state, after the valve is installed, the valves are extruded through the first telescopic cylinder 2 and are fixed, further, off-axis motion simulation of the valves is performed through the bending mechanism 6, gas injection and pressure maintaining are performed inside the valves through the first outer connecting pipe 5 and the second outer connecting pipe 7 in the off-axis motion simulation process of the valves, and then the leakage resistance of the valves is detected, and gas can be injected and pressure maintaining can be performed before the off-axis motion simulation of the valves;
For the device of the application, further, pressure gauges (not shown in the figure) are connected in the inner part of the outflow end and the inner part of the inflow end of the valve, the pressure gauges can be connected with a first external connecting pipe 5 and a second external connecting pipe 7, so as to measure the pressure in the valve body, and through inputting gases with different pressures into the inflow end and the outflow end of the valve (generally, the pressure of the gas at the inflow end is higher than that of the gas at the outflow end), whether leakage occurs between the inflow end and the outflow end of the valve is judged through the pressure gauge value change at the two ends of the valve after a period of pressure maintaining, if no leakage occurs, the pressure at the two ends of the valve can be further changed, the pressure maintaining is carried out for a period of time again, the pressure gauge value condition at the two ends of the valve is observed, and when the pressure maintaining and changing the pressure at the two ends of the valve, the first external connecting pipe 5 and the second external connecting pipe 7 are not communicated with an external gas source (the components for adjusting the pressure change in the valve such as a degassing and surge mechanism 14);
Furthermore, the water enclosing plate 17 is arranged on the outer side of the device, and the water is filled into the water enclosing plate 17 to submerge the valve to be detected, so that after the gas is filled into the valve, whether bubbles are discharged from the surface of the valve can be directly observed, and whether the whole valve leaks or not can be judged.
In some embodiments, the valve leaks during the process of changing the gas pressure, the pressure gauge cannot effectively monitor, so that a helium sensor (not shown in the drawing) is disposed inside the first compression plate 3, the second extension tube 7 is connected to an external helium injection device, the gas pressure of the second extension tube 7 injected into the valve is greater than the gas pressure of the first extension tube 5 injected into the valve, and the content of helium in the air is about 5.2 parts per million, so that the first extension tube 5 can inject ordinary air, and when helium in the valve connected to the second extension tube 7 leaks to the valve side connected to the first extension tube 5, the content of helium in the valve connected to the first extension tube 5 is rapidly increased, and the helium sensor can rapidly detect the change of the content of helium and output signals to the outside, so that the leakage condition of the valve is effectively and accurately determined, and when the pressure of both ends of the valve is changed, the first extension tube 5 and the second extension tube 7 are not connected to an external gas source (components for adjusting the change in the valve such as the degassing mechanism 14).
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. Leak protection detection device is used in valve processing, its characterized in that: comprising the following steps:
The telescopic device comprises a first telescopic cylinder (2), wherein the first telescopic cylinder (2) is fixedly arranged on a base (1), a first compression plate (3) is fixedly arranged at the end part of a piston rod of the first telescopic cylinder (2), a positioning column (4) is fixedly arranged at the inner side of the first compression plate (3), a first outer connecting pipe (5) is arranged at the outer side of the first compression plate (3), and the first outer connecting pipe (5) is communicated with the inside of a valve through the first compression plate (3);
The bending mechanism (6), the inboard of bending mechanism (6) is equipped with second clamp plate (601), the inboard fixed mounting reference column (4) of second clamp plate (601), bending mechanism (6) are connected with second outer takeover (7), second outer takeover (7) are switched on with the valve inside through second clamp plate (601), bending mechanism (6) drive second clamp plate (601) produces the off-axis motion, bending mechanism (6) include push tube (602), push tube (602) are hollow pipeline, push tube (602) one end fixed mounting second clamp plate (601), push tube (602) inside is switched on with the valve inside through second clamp plate (601), push tube (602) other end fixed mounting limiting plate (603), limiting plate (603) lateral surface slides and leans on in limiting ring (604) medial surface, limiting ring (604) are fixed mounting in base (1) through limiting bracket (6041), limiting plate (603) are equipped with, second outer side (605) and inside of the eccentric connection of second outer takeover (605) are installed in the eccentric connection of round tube (605), the axis of the eccentric column (605) is parallel to the axis of the fourth rotating wheel (902), the axis of the eccentric column (605) is spaced from the axis of the fourth rotating wheel (902) by an interval L, L is more than 0.0mm and less than or equal to 50.0mm, the fourth rotating wheel (902) is driven to rotate around the axis of the fourth rotating wheel (902) through a motor (8), the motor (8) is fixedly arranged on the base (1), a supporting ring (13) is arranged in the middle of the top pressure pipe (602), the supporting ring (13) is sleeved on the top pressure pipe (602), the supporting ring (13) is arranged on the top pressure pipe (602) through a rubber ring (1301), the supporting ring (13) is fixedly arranged on the base (1) through a supporting bracket (1302), a piston rod of the first telescopic cylinder (2) penetrates through a sliding hole block (12) and is fixedly arranged on the base (1) through a sliding hole bracket (1201), a first compression plate (3) is connected with a negative pressure tank through a negative pressure valve through a 15, the negative pressure tank is connected with a first air valve, and the negative pressure tank is opposite to the second air valve (601) through a second air valve, and the negative pressure tank is opposite to the second air valve (601) and is connected with the air valve;
The air surge mechanism (14), the air surge mechanism (14) comprises a piston air tank (1401), one end of the piston air tank (1401) is connected with a first compression plate (3) through a hose (15) and is communicated with the inside of a valve, the other end of the piston air tank (1401) is connected with a second compression plate (601) through the hose (15) and is communicated with the inside of the valve, an air slide plug (1403) is slidably arranged in the piston air tank (1401), the air slide plug (1403) is kept sealed with the piston air tank (1401), a second telescopic cylinder (1402) is arranged at one end side of the piston air tank (1401), a piston rod of the second telescopic cylinder (1402) penetrates into the inside of the piston air tank (1401) in a sliding and sealing mode, the air slide plug (1403) is fixedly arranged at the end portion of the piston rod of the second telescopic cylinder (1402), the second telescopic cylinder (1402) drives the air slide plug (1403) to move, the second telescopic cylinder (1402) is fixedly arranged on a base (1), locking buckles (16) are respectively arranged on the outer sides of the first compression plate (3) and the second compression plate (601), the locking blocks (16) are respectively arranged on the outer sides of the second compression plate (1601) and the outer compression plate (601), the utility model discloses a side piece (1601) stretching out part rotates and runs through installation even post (1602), just even post (1602) can axial sliding, even post (1602) one end fixed mounting locking piece (1606), even the other end rotation of post (1602) is installed in cross axle (1603), cross axle (1603) eccentric mounting is in round rotating piece (1604), round rotating piece (1604) middle part has the clearance that holds even post (1602) motion, round rotating piece (1604) side fixed mounting handle (1605), be equipped with rubber pad (1607) between round rotating piece (1604) and side piece (1601).
2. The leak detection device for valve processing according to claim 1, wherein: the motor (8) drives a fourth rotating wheel (902) through a transmission mechanism (9), the transmission mechanism (9) comprises a first rotating wheel (901), the first rotating wheel (901) is fixedly arranged on the motor (8), the motor (8) is fixedly arranged on a driving support (11), the fourth rotating wheel (902) is rotationally connected with the driving support (11), the first rotating wheel (901) is connected with the fourth rotating wheel (902) through a belt, and the driving support (11) is fixedly arranged on a base (1).
3. The leak detection device for valve processing according to claim 2, wherein: the first runner (901) is connected with the fourth runner (902) through reducing gear (10), reducing gear (10) include second runner (1001), second runner (1001) rotate install in drive support (11), coaxial fixed mounting third runner (1002) of second runner (1001), the diameter of second runner (1001) is greater than the diameter of third runner (1002), first runner (901) are connected with second runner (1001) through the belt, third runner (1002) are connected with fourth runner (902) through the belt.
4. The leak detection device for valve processing according to claim 1, wherein: the end part of the positioning column (4) is provided with threads, and a nut is arranged after the valve is arranged on the positioning column (4).
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