CN219551834U - Online testing device and offline testing device for mechanical limit switch of valve - Google Patents
Online testing device and offline testing device for mechanical limit switch of valve Download PDFInfo
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- CN219551834U CN219551834U CN202223034459.2U CN202223034459U CN219551834U CN 219551834 U CN219551834 U CN 219551834U CN 202223034459 U CN202223034459 U CN 202223034459U CN 219551834 U CN219551834 U CN 219551834U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The utility model discloses an online testing device and an offline testing device for a mechanical limit switch of a valve, comprising an upper computer, a measurement and control cabinet, a swing arm clamp and an inclination sensor, wherein the swing arm clamp can be clamped on a swing arm of the limit switch to be tested; the inclination angle sensor is detachably connected to the swing arm clamp; the swing arm can drive the inclination sensor to synchronously move when swinging, and the inclination sensor outputs a swing arm angle signal of the limit switch to be detected in real time; the measurement and control cabinet is connected with the limit switch to be measured and the inclination sensor; the measurement and control cabinet comprises a data acquisition board card for acquiring swing arm angle signals, a digital multimeter for acquiring contact on-off signals and a switch for transmitting the swing arm angle signals and the contact on-off signals to the upper computer; the upper computer is connected with the switch to display and record the swing arm angle signal and the contact on-off signal. The on-line testing device for the mechanical limit switch of the valve can measure the swing arm angle signal when the limit switch to be tested is triggered and reset.
Description
Technical Field
The utility model relates to the technical field of maintenance of mechanical limit switches of nuclear power valves, in particular to an on-line testing device and an off-line testing device of a mechanical limit switch of a valve.
Background
The main steam isolating valve belongs to a nuclear secondary important device, and has the function of isolating the steam generator under the conditions of low pressure of a steam pipeline in a main steam loop, sudden pressure drop or low temperature of a cold section. The main steam isolation valve limit switch is used for judging whether the valve reaches a specified position, the swing arm angle of the main steam isolation valve limit switch changes along with the stroke position of the valve rod, and when the valve rod moves to the specified position, namely, the limit switch swing arm swings to the specified angle, the on-off state of the contact point of the limit switch changes.
The main steam isolation valve limit switch is used as a key component for controlling the working mode of the main steam isolation valve, such as controlling quick closing, slow closing, office closing and opening, and plays a role in the normal operation of the nuclear power plant and the accident handling process, and serious accidents are caused if the limit switch is improperly arranged.
Some limit switches may have deviation after long-term use, for example, when the valve rod moves to a designated position, the on-off state of the contact of the limit switch is not changed, and serious accident risks exist.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an on-line testing device and an off-line testing device for a mechanical limit switch of a valve aiming at least one defect of the related art mentioned in the background art.
The technical scheme adopted for solving the technical problems is as follows: an on-line testing device for a mechanical limit switch of a valve is constructed, and the on-line testing device comprises an upper computer, a measurement and control cabinet, a swing arm clamp and an inclination sensor, wherein the swing arm clamp can be clamped on a swing arm of the limit switch to be tested;
the inclination sensor is detachably connected to the swing arm clamp; the swing arm can drive the inclination sensor to synchronously move when swinging, and the inclination sensor outputs a swing arm angle signal of the limit switch to be detected in real time;
the measurement and control cabinet is connected with the limit switch to be measured and the inclination sensor; the measurement and control chassis comprises a data acquisition board card for acquiring the swing arm angle signal, a digital multimeter for acquiring a contact on-off signal and a switch for transmitting the swing arm angle signal and the contact on-off signal to the upper computer; the upper computer is connected with the switch to display and record the swing arm angle signal and the contact on-off signal.
Preferably, in the valve mechanical limit switch on-line testing device of the present utility model, the swing arm fixture includes a chuck and an inclination sensor bracket; the clamping head is clamped on the swing arm, and the inclination sensor bracket is detachably connected to the clamping head; the inclination sensor is arranged on the inclination sensor bracket.
Preferably, in the valve mechanical limit switch on-line testing device of the present utility model, the inclination sensor bracket includes a fixing plate and a support rod; one end of the supporting rod is connected with the fixed plate, and the other end of the fixed plate is detachably connected with the clamping head; the inclination sensor is mounted on the fixed plate.
Preferably, in the valve mechanical limit switch on-line testing device of the present utility model, the support rod is connected with the chuck through engagement.
Preferably, in the valve mechanical limit switch on-line testing device of the utility model, the clamping head comprises a movable clamping head, a fixed clamping head, a pressing block and a locking piece; the movable chuck is arranged at one end part of the fixed chuck, and the pressing block is movably arranged in the middle part of the fixed chuck;
one ends of the pressing block and the fixed chuck far away from the movable chuck are respectively clamped at the opposite ends of the swing arm; one end of the locking piece enters the movable chuck and is abutted against the pressing block, and the entering depth of the locking piece is adjusted to adjust the relative distance between the pressing block and the movable chuck.
Preferably, in the on-line testing device for a mechanical limit switch of a valve, the movable chuck is rotatably arranged at one end of the fixed chuck, and one end of the pressing block opposite to the movable chuck is provided with a guide post movably connected with the movable chuck;
and adjusting the relative angle between the movable chuck and the fixed chuck so as to adjust the relative angle between the pressing block and the fixed chuck.
Preferably, in the on-line testing device for a mechanical limit switch of a valve, the digital multimeter can be further used for collecting a contact resistance value of the limit switch to be tested, and the switch is further used for transmitting the contact resistance value to the upper computer; the upper computer is also used for displaying and recording the contact resistance.
The utility model also constructs an off-line testing device for the mechanical limit switch of the valve, which comprises the on-line testing device for the mechanical limit switch of the valve; the test platform is connected with the measurement and control cabinet;
the test platform comprises a motion control module, a fixing module for fixing the limit switch to be tested, a guide rail sliding table, a motor and a baffle; the motion control module is connected with the upper computer and the motor; the motor is connected with the guide rail sliding table shaft; the baffle is connected to the guide rail sliding table relative to the swing arm of the limit switch to be detected, and the extension length of the baffle towards the swing arm of the limit switch to be detected is larger than the minimum distance between the guide rail sliding table and the swing arm of the limit switch to be detected; the fixing module can be used for detachably fixing the limit switch to be detected;
starting the motor, and enabling the baffle to move close to or far away from the swing arm of the limit switch to be detected; the upper computer displays and records the swing arm angle signal, the contact on-off signal, the contact resistance signal and the control motion control module.
Preferably, in the off-line testing device for a mechanical limit switch of a valve, the testing platform further comprises a platform bracket; the platform bracket comprises a supporting plate and a mounting plate which are mutually angled; the motion control module and the fixing module are arranged at the part of the mounting plate away from the supporting plate; the guide rail sliding table is arranged at the part of the mounting plate, which is close to the supporting plate; the fixed module and the guide rail sliding table are arranged on the same side of the mounting plate.
Preferably, in the off-line testing device for a mechanical limit switch of a valve, the fixing module comprises a containing groove, a limiting piece and an adjusting bolt; the accommodating groove is embedded in the limit switch to be detected of the accommodating part, which is arranged on the mounting plate, and the limiting piece is arranged on two sides of the accommodating groove; the adjusting bolt enters from one end of the limiting piece on any side of the accommodating groove, which is far away from the accommodating groove, and penetrates through the limiting piece to be abutted against the limit switch to be detected.
By implementing the utility model, the following beneficial effects are achieved:
the on-line testing device for the mechanical limit switch of the valve can measure the swing arm angle signal when the limit switch to be tested is triggered and reset.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of an on-line testing device for a mechanical limit switch of a valve according to the present utility model;
FIG. 2 is an enlarged schematic view of the lower right portion of FIG. 1;
FIG. 3 is a schematic view of the swing arm clamp shown in FIG. 2;
FIG. 4 is a schematic view of the structure of the tilt sensor bracket shown in FIG. 3;
FIG. 5 is a schematic view of the stationary chuck shown in FIG. 3;
FIG. 6 is a schematic view of the attachment of the tilt sensor bracket shown in FIG. 3 to a stationary chuck;
FIG. 7 is a schematic diagram of an off-line testing device for a mechanical limit switch of a valve according to the present utility model;
FIG. 8 is a schematic diagram of the structure of the test platform of FIG. 7 according to the present utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or chemically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
Referring to fig. 1 to 6, an embodiment of the utility model discloses an on-line testing device for a mechanical limit switch of a valve, which comprises an upper computer 1, a measurement and control cabinet 2, a swing arm clamp 3 and an inclination sensor 4, wherein the swing arm clamp 3 can be clamped on a swing arm 61 of the limit switch 6 to be tested; the inclination angle sensor 4 is detachably connected to the swing arm clamp 3; the swing arm can drive the inclination sensor 4 to synchronously move when swinging, and the inclination sensor 4 outputs an angle signal of the swing arm 61 of the limit switch 6 to be detected in real time; the measurement and control cabinet 2 is connected with a limit switch 6 to be measured and an inclination sensor 4; the measurement and control cabinet 2 comprises a data acquisition board card for acquiring swing arm angle signals, a digital multimeter for acquiring contact on-off signals and a switch for transmitting the swing arm angle signals and the contact on-off signals to the upper computer 1; the upper computer 1 is connected with the switch to display and record swing arm angle signals and contact on-off signals. The upper computer 1 is internally provided with an upper computer 1 software system, and the upper computer 1 displays and records swing arm angle signals and contact on-off signals. In addition, in the valve mechanical limit switch on-line testing device, the digital multimeter can be used for collecting the contact resistance value of the limit switch 6 to be tested, and the switch is also used for transmitting the contact resistance value to the upper computer 1; the upper computer 1 is also used for displaying and recording the contact resistance.
The limit switch 6 to be tested of the valve mechanical limit switch on-line testing device can be a limit switch connected to a main steam isolation valve of a nuclear power plant, a swing arm of the limit switch can be driven to swing through the movement of a valve rod of the main steam isolation valve, the tilt sensor 4 can be driven to synchronously move when the swing arm swings, the tilt sensor 4 outputs swing arm angle signals of the limit switch in real time, such as when the contact of the limit switch 6 to be tested is communicated in the swing process, when the contact of the limit switch 6 to be tested is disconnected and when the swing arm stops, the swing arm angle signals are output to a data acquisition board card of the measurement and control case 2 in real time, the switch transmits the swing arm angle signals acquired by the data acquisition board card to the upper computer 1 in real time, and the upper computer 1 can display and record the swing arm angle signals in real time. Meanwhile, the measurement and control case 2 contains a digital multimeter for collecting contact on-off signals and contact resistance values, so that the contact on-off signals and the contact resistance values of the limit switch can be collected in real time, namely, the contact on-off signals and the contact resistance values of the limit switch 6 to be measured are transmitted to the upper computer 1 in real time through a switch when the contacts of the limit switch 6 to be measured are communicated in the swinging process and the contacts of the limit switch 6 to be measured are disconnected, and the upper computer 1 can display and record the contact on-off signals and the contact resistance values in real time. The swing arm angle signal when the limit switch 6 to be detected is triggered and reset can be obtained by comparing the swing arm angle signal and the contact on-off signal at the same time. Preferably, the measurement and control case 2 is in connection communication with the upper computer 1 through an Ethernet cable, is connected with the limit switch 6 to be measured through an aviation connector and a cable, is used for measuring contact on-off signals and contact resistance values of the limit switch, is connected with the inclination sensor 4 through a serial port communication cable, is used for measuring inclination in real time, and is integrated in a case panel. It should be noted that: the above-mentioned connection lines are not shown in fig. 1 to 6.
It should be appreciated that the contact resistance may be reflected by a voltage/current analog signal that is linear with the current tilt attitude.
Specifically:
in order to enable the inclination sensor 4 to swing along with the swing arm 61 of the limit switch 6 to be detected so as to collect a swing arm angle signal, as shown in fig. 2, the swing arm clamp 3 comprises a clamping head 31 and a bracket 32 of the inclination sensor 4; the clamping head 31 is clamped on the swing arm, and the bracket 32 of the inclination sensor 4 is detachably connected to the clamping head 31; the tilt sensor 4 is mounted on the tilt sensor 4 bracket 32 of the tilt sensor 4.
Further, in order to mount the fixed tilt sensor 4, as shown in fig. 4, the bracket 32 of the tilt sensor 4 comprises a fixing plate (321 and a supporting rod 322, wherein one end of the supporting rod 322 is connected with the fixing plate (321), the other end of the supporting rod 322 is detachably connected with the clamping head 31, the tilt sensor 4 is mounted on the fixing plate (321. Preferably, the supporting rod 322 can be a curved rod with a certain radian, a plurality of connecting holes 315 are formed on the fixing plate (321), and the tilt sensor 4 can be connected and fixed with the fixing plate (321) through screws, or can be connected and fixed through bonding, binding or the like in other embodiments.
Further, in order to adjust the connection angle of the support bar 322 with the collet 31, as shown in fig. 4 to 6, the support bar 322 is connected with the collet 31 by engagement. The inclination sensor 4 bracket 32 has compact structure and adjustable installation angle, can avoid on-site interference, and has strong adaptability to the in-line test in a narrow space. One end of the support rod 322, which is close to the chuck 31, is provided with a connecting hole 315, an external gear is inserted into the connecting hole 315 and fixedly connected with the connecting hole 315, and the part of the external gear, which extends out of the connecting hole 315, is provided with teeth; the inside of the clamping head 31 is provided with a connecting hole 315, the connecting hole 315 is an internal gear, and the external gear and the internal gear are mutually matched to adjust the connecting angle of the supporting rod 322 and the clamping head 31. In other embodiments, the chuck 31 may be provided with an external gear, the part of the external gear extending out of the chuck 31 is provided with teeth, one end of the support rod 322 near the chuck 31 is provided with a connecting hole 315, teeth matching with the external gear are arranged in the connecting hole 315, the external gear is inserted into the connecting hole 315 to realize connection, and the connection angle between the support rod 322 and the chuck 31 can be adjusted.
In order to clamp on the swing arms of the limit switch 6 to be tested with different sizes, as shown in fig. 3, the clamping head 31 comprises a movable clamping head 311, a fixed clamping head 312, a pressing block 313 and a locking piece 314; the movable clamp 311 is arranged at one end of the fixed clamp 312, and the pressing block 313 is movably arranged at the middle of the fixed clamp 312; one end of the pressing block 313 and one end of the fixed chuck 312, which are far away from the movable chuck 311, are respectively clamped at two opposite ends of the swing arm; one end of the locking piece 314 enters the movable clamping head 311 and abuts against the pressing block 313, and the entering depth of the locking piece 314 is adjusted to adjust the relative distance between the pressing block 313 and the movable clamping head 311. Preferably, the pressing block 313 and the fixed chuck 312 are respectively clamped on two side surfaces of the swing arm 61 of the limit switch 6 to be tested, and the fastening pieces connected to the movable chuck 311 can be adjusted to adapt to different clamping end face distances of the swing arm 61 of the limit switch 6 to be tested of different types of limit switches 6 to be tested, and apply clamping force. The fastener may be a dovetail bolt and the press block 313 may be L-shaped. The pressing block 313 and one end of the fixed clamp 312 far away from the movable clamp 311 are respectively provided with a clamping channel 316, and the opposite ends of the swing arm are inserted into the clamping channels 316 to be connected. In order to realize that the pressing block 313 is movably arranged in the middle of the fixed clamping head 312, a long waist hole can be formed in the fixed clamping head 312, a bolt penetrates through the pressing block 313 and the long waist hole, the pressing block 313 is fixed by matching with a nut, and the pressing block 313 is pressed down by the dovetail bolt to realize that the pressing block 313 moves on the long waist hole.
Further, in order to adjust the relative angle between the pressing block 313 and the fixed chuck 312 to adapt to the end face included angles of different swing arms, the movable chuck 311 is rotatably arranged at one end of the fixed chuck 312, and the movable chuck 311 is connected with the fixed chuck 312 through a pin shaft, so that the movable chuck 311 can freely rotate around the connecting pin shaft within a certain angle range; one end of the pressing block 313 opposite to the movable clamp 311 is provided with a guide post 317 movably connected with the movable clamp 311, and the guide post 317 is matched with a guide hole on the movable clamp 311 to form a shaft hole so as to limit the rotation of the pressing block 313 in the direction of the clamping end face; the relative angle of the movable clamp 311 and the fixed clamp 312 is adjusted to adjust the relative angle of the pressing block 313 and the fixed clamp 312. Preferably, as shown in fig. 5, a yielding channel 318 and a pin hole 319 are provided at one end of the fixed chuck 312, the yielding channel 318 provides a rotation space for the movable chuck 311, the movable chuck 311 is inserted into the yielding channel 318, and a pin shaft passes through the yielding channel 318 and the movable chuck 311 to realize rotatable connection. The guide post 317 is fixedly connected to one end of the pressing block 313 opposite to the movable chuck 311, and a guide hole is provided on the movable chuck 311 for the guide post 317 to pass through, so that the guide post 317 can move along the axial direction of the movable chuck 311 and prevent the pressing block 313 from rotating relative to the movable chuck 311. In some embodiments, at least two guide posts 317 may be provided, with corresponding guide holes provided on the movable clamp 311.
Referring to fig. 7 to 8, an embodiment of the present utility model discloses an off-line testing device for a mechanical limit switch of a valve, which includes the on-line testing device for the mechanical limit switch of the valve according to any one of the above embodiments; the test platform 5 is connected with the measurement and control cabinet 2; the test platform 5 comprises a motion control module 51, a fixing module 52 for fixing the limit switch 6 to be tested, a guide rail sliding table 53, a motor 54 and a baffle 55; the motion control module 51 is connected with the upper computer 1 and the motor 54; the motor 54 is connected with the guide rail sliding table 53 in a shaft way; the baffle 55 is connected to the guide rail sliding table 53 relative to the swing arm 61 of the limit switch 6 to be detected, and the extension length of the baffle 55 towards the swing arm 61 of the limit switch 6 to be detected is larger than the minimum distance between the guide rail sliding table 53 and the swing arm 61 of the limit switch 6 to be detected; the fixing module 52 can detachably fix the limit switch 6 to be detected; starting the motor 54, and moving the baffle 55 close to or far from the swing arm 61 of the limit switch 6 to be detected; the upper computer 1 is internally provided with an upper computer 1 software system, and the upper computer 1 displays and records a swing arm angle signal, a contact on-off signal, a contact resistance signal and a control motion control module 51. The guide rail sliding table 53 and the motor 54 are used for simulating the linear motion of the valve rod, and the baffle plate 55 is fixed on the guide rail sliding table 53 and used for poking the swing arm 61 of the limit switch 6 to be measured to move. Preferably, the measurement and control chassis 2 and the motion control module 51 of the test platform 5 are in communication through an ethernet cable connection, and the motor 54 is a stepper motor. The above mentioned connection lines are not shown in fig. 7 and 8. It should be noted that the off-line testing device for the mechanical limit switch of the valve includes the on-line testing device for the mechanical limit switch of the valve in any one of the above embodiments, which is not described herein again.
The test platform 5 is used for clamping and fixing the limit switch 6 to be tested in off-line test in a laboratory environment, and can simulate linear motion of a field valve rod, and toggle the swing arm 61 of the limit switch 6 to be tested to control angle change of the swing arm 61 of the limit switch 6 to be tested. The test platform 5 is matched with the valve mechanical limit switch on-line test device to measure the swing arm angle signal when the limit switch 6 to be tested in an off-line state is triggered and reset.
The specific method comprises the following steps: firstly, the upper computer 1 controls the starting motor 54 to drive the baffle 55 to slide on the guide rail sliding table 53 through the motion control module 51, the sliding table slides close to the swing arm 61 of the limit switch 6 to be tested, the limit switch contacts continue to travel a short distance after being communicated so as to ensure physical complete communication, and meanwhile, the inclination sensor 4 outputs swing arm angle signals of the limit switch in real time, such as swing arm angle signals of the limit switch 6 to be tested when the contacts are communicated in the initial position of the swing arm and in the swing process, to a data acquisition board card of the measurement and control case 2. Then the upper computer 1 controls the motor 54 to reversely rotate through the motion control module 51 so as to control the baffle 55 to reversely slide on the guide rail sliding table 53, and the baffle continues to travel a small distance after the contact of the limit switch is disconnected so as to ensure physical complete disconnection, and meanwhile, the inclination sensor 4 outputs swing arm angle signals of the limit switch in real time, for example, the swing arm angle signals when the contact of the limit switch 6 to be detected is disconnected and the swing arm stops are output to the data acquisition board card of the measurement and control case 2 in real time. The synchronous operation is also carried out, the switch transmits the swing arm angle signals acquired by the data acquisition board card to the upper computer 1 in real time, and the upper computer 1 can display and record the swing arm angle signals in real time; the measurement and control case 2 contains a digital multimeter for collecting contact on-off signals, and can collect the contact on-off signals and the contact resistance of the limit switch in real time, namely, the contact on-off signals and the contact resistance when the contact of the limit switch 6 to be measured is communicated and the contact of the limit switch 6 to be measured is disconnected in the swinging process, and the signals and the contact resistance are transmitted to the upper computer 1 in real time through the switch, and the upper computer 1 can display and record the contact on-off signals and the contact resistance in real time. The swing arm angle signal when the limit switch 6 to be detected is triggered and reset can be obtained by comparing the swing arm angle signal and the contact on-off signal at the same time.
Specifically:
to realize modular installation of the test platform 5 for convenient carrying and use, as shown in fig. 8, the test platform 5 further comprises a platform bracket for fixing and supporting each element on the test platform 5, the platform bracket comprising a supporting plate 561 and a mounting plate 562 which are angled with each other; the motion control module 51 and the fixing module 52 are provided at a portion of the mounting plate 562 remote from the support plate 561; the guide rail sliding table 53 is arranged at the part of the mounting plate 562, which is close to the supporting plate 561; the fixed module 52 and the guide rail sliding table 53 are arranged on the same side of the mounting plate 562. Preferably, the support plate 561 and the mounting plate 562 are vertically disposed and fixed using a triangle. The mounting plate 562 is provided with a waist hole, so that the test platform 5 can be conveniently carried by a hand.
Further, in order to fix the limit switch 6 to be measured, the fixing module 52 includes a receiving groove 521, a limiting member 522, and an adjusting bolt 523; the accommodating groove 521 is embedded in the mounting plate 562 and can accommodate part of the limit switch 6 to be detected, and the limiting piece 522 is arranged at two sides of the accommodating groove 521; the adjusting bolt 523 enters from one end of the limiting piece 522 on either side of the accommodating groove 521 away from the accommodating groove 521 and penetrates through the limiting piece 522 to abut against the limit switch 6 to be measured. Preferably, the limit switch 6 to be tested is partially disposed in the accommodating groove 521, and partially disposed in the limiting member 522, and the adjusting bolt 523 is used for pressing the limit switch 6 to be tested to realize clamping and fixing of the limit switch 6 to be tested.
By implementing the utility model, the following beneficial effects are achieved:
the on-line testing device for the mechanical limit switch of the valve can measure the swing arm angle signal when the limit switch to be tested is triggered and reset.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above embodiments or technical features may be freely combined, and several variations and modifications may be made, without departing from the spirit of the utility model, which fall within the scope of the utility model, i.e. the embodiments described in "some embodiments" may be freely combined with any of the above and below embodiments; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. The on-line testing device for the mechanical limit switch of the valve is characterized by comprising an upper computer (1), a measurement and control cabinet (2), a swing arm clamp (3) and an inclination sensor (4), wherein the swing arm clamp can be clamped on a swing arm (61) of a limit switch (6) to be tested;
the inclination angle sensor (4) is detachably connected to the swing arm clamp (3); the swing arm can drive the inclination sensor (4) to synchronously move when swinging, and the inclination sensor (4) outputs a swing arm (61) angle signal of the limit switch (6) to be detected in real time;
the measurement and control cabinet (2) is connected with the limit switch (6) to be measured and the inclination angle sensor (4); the measurement and control cabinet (2) comprises a data acquisition board for acquiring the swing arm angle signals, a digital multimeter for acquiring contact on-off signals and a switch for transmitting the swing arm angle signals and the contact on-off signals to the upper computer (1); the upper computer (1) is connected with the switch to display and record the swing arm angle signal and the contact on-off signal.
2. The valve mechanical limit switch on-line testing device according to claim 1, wherein the swing arm fixture (3) comprises a chuck (31) and an inclination sensor (4) bracket (32) of the inclination sensor (4); the clamping head (31) is clamped on the swing arm, and the inclination sensor (4) bracket (32) of the inclination sensor (4) is detachably connected to the clamping head (31); the inclination angle sensor (4) is arranged on a bracket (32) of the inclination angle sensor (4).
3. The valve mechanical limit switch on-line testing device according to claim 2, wherein the tilt sensor (4) bracket (32) of the tilt sensor (4) comprises a fixed plate (321) and a support rod (322); one end of the supporting rod (322) is connected with the fixed plate (321), and the other end of the supporting rod (322) is detachably connected with the clamping head (31); the inclination sensor (4) is mounted on the fixed plate (321).
4. A valve mechanical limit switch on-line testing device according to claim 3, characterized in that the support bar (322) is connected with the collet (31) by engagement.
5. The valve mechanical limit switch on-line testing device according to claim 2, wherein the chuck (31) comprises a movable chuck (311), a fixed chuck (312), a pressing block (313) and a locking member (314); the movable clamp head (311) is arranged at one end part of the fixed clamp head (312), and the pressing block (313) is movably arranged in the middle part of the fixed clamp head (312);
one end of the pressing block (313) and one end of the fixed chuck (312) far away from the movable chuck (311) are respectively clamped at two opposite ends of the swing arm; one end of the locking piece (314) enters the movable clamp head (311) and abuts against the pressing block (313), and the entering depth of the locking piece (314) is adjusted to adjust the relative distance between the pressing block (313) and the movable clamp head (311).
6. The on-line testing device for mechanical limit switches of valves according to claim 5, wherein the movable chuck (311) is rotatably disposed at an end of the fixed chuck (312), and a guide post (317) movably connected to the movable chuck (311) is disposed at an end of the pressing block (313) opposite to the movable chuck (311);
and adjusting the relative angle of the movable clamp (311) and the fixed clamp (312) so as to adjust the relative angle of the pressing block (313) and the fixed clamp (312).
7. The on-line testing device for mechanical limit switches of valves according to any one of claims 1 to 6, wherein the digital multimeter is further operable to collect a contact resistance value of the limit switch (6) to be tested; the switch is also used for transmitting the contact resistance value to the upper computer (1); the upper computer (1) is also used for displaying and recording the contact resistance.
8. An off-line testing device for a mechanical limit switch of a valve, which is characterized by comprising the on-line testing device for the mechanical limit switch of the valve according to claim 7; the test platform (5) is connected with the measurement and control cabinet (2);
the test platform (5) comprises a motion control module (51), a fixing module (52) for fixing the limit switch (6) to be tested, a guide rail sliding table (53), a motor (54) and a baffle plate (55); the motion control module (51) is connected with the upper computer (1) and the motor (54); the motor (54) is connected with the guide rail sliding table (53) in a shaft way; the baffle (55) is connected to the guide rail sliding table (53) relative to the swing arm (61) of the limit switch (6) to be detected, and the extension length of the baffle (55) towards the swing arm (61) of the limit switch (6) to be detected is larger than the minimum distance between the guide rail sliding table (53) and the swing arm (61) of the limit switch (6) to be detected; the fixing module (52) can be used for detachably fixing the limit switch (6) to be detected;
starting the motor (54), and enabling the baffle plate (55) to move close to or far from the swing arm (61) of the limit switch (6) to be detected; the upper computer (1) displays and records the swing arm angle signal, the contact on-off signal and the contact resistance signal and controls the motion control module (51).
9. The off-line testing device of a mechanical limit switch of a valve according to claim 8, wherein the testing platform (5) further comprises a platform support; the platform bracket comprises a support plate (561) and a mounting plate (562) which are at an angle to each other; the motion control module (51) and the fixing module (52) are arranged at the part of the mounting plate (562) away from the supporting plate (561); the guide rail sliding table (53) is arranged at the part of the mounting plate (562) close to the supporting plate (561); the fixed module (52) and the guide rail sliding table (53) are arranged on the same side of the mounting plate (562).
10. The off-line testing device of a mechanical limit switch of a valve according to claim 9, wherein the fixed module (52) comprises a receiving groove (521), a limiting member (522) and an adjusting bolt (523); the accommodating groove (521) is embedded in the limit switch (6) to be detected, which is arranged on the mounting plate (562) and can accommodate part of the limit switch, and the limiting piece (522) is arranged on two sides of the accommodating groove (521); the adjusting bolt (523) enters from one end, away from the accommodating groove (521), of the limiting piece (522) on any side of the accommodating groove (521) and penetrates through the limiting piece (522) to abut against the limit switch (6) to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223034459.2U CN219551834U (en) | 2022-11-15 | 2022-11-15 | Online testing device and offline testing device for mechanical limit switch of valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223034459.2U CN219551834U (en) | 2022-11-15 | 2022-11-15 | Online testing device and offline testing device for mechanical limit switch of valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219551834U true CN219551834U (en) | 2023-08-18 |
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ID=87728811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223034459.2U Active CN219551834U (en) | 2022-11-15 | 2022-11-15 | Online testing device and offline testing device for mechanical limit switch of valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219551834U (en) |
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2022
- 2022-11-15 CN CN202223034459.2U patent/CN219551834U/en active Active
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