CN115993529B - Performance test platform for non-contact limit switch - Google Patents
Performance test platform for non-contact limit switch Download PDFInfo
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- CN115993529B CN115993529B CN202310279814.2A CN202310279814A CN115993529B CN 115993529 B CN115993529 B CN 115993529B CN 202310279814 A CN202310279814 A CN 202310279814A CN 115993529 B CN115993529 B CN 115993529B
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Abstract
The invention relates to the technical field of nuclear power equipment, in particular to a performance test platform for a non-contact limit switch. The performance test platform for the non-contact limit switch comprises: the base is fixedly provided with a vertical screw rod; the magnet objective table is connected with the base; the side walls are fixed on the periphery of the base to form an independent space; the vertical screw rod is also connected with a horizontal direction bottom plate, and the vertical hand wheel is connected with the vertical screw rod through a vertical transmission mechanism to realize the movement of the horizontal direction bottom plate in the vertical direction; the limit switch fixing device is arranged on the horizontal screw rod; the horizontal screw rod is controlled by a horizontal hand wheel to drive the limit switch fixing device to slide on the bottom plate in the horizontal direction; the horizontal bottom plate is provided with scales; graduations are also arranged on the side wall. The invention can obtain the specific action range value of the non-contact limit switch in the transverse direction and the longitudinal direction, and improve the reliability of equipment.
Description
Technical Field
The invention relates to the technical field of nuclear power equipment, in particular to a performance test platform for a non-contact limit switch.
Background
A non-contact limit switch is a device that causes a contact switch to operate when a moving part reaches a certain position, thereby causing a circuit to be switched. The non-contact limit switch plays roles in state judgment, limit protection and control. However, as the non-contact limit switch is used for a valve, the trigger device is connected with the valve through the connecting rod, the mechanical structure of the trigger device is easily affected by the ambient temperature, and the limit switch can be invalid due to the installation deviation, swing, position change, deformation, collision and abrasion and the like generated in the working environment. In a main steam isolation valve of a nuclear power plant, a limit switch is used as an important equipment component, the failure of the limit switch can affect the judgment of the equipment state and cause logic false triggering, and the stop and stack of the nuclear power plant can be caused when the condition is serious. In the on-site actual work, trigger device of non-contact limit switch receives ambient temperature influence, easily bumps the mill with the limit switch body in the valve action in-process, shortens limit switch life and security.
Therefore, a non-contact limit switch performance test platform is required to be designed to simulate the influence caused by the actual working environment of the site, so that the specific working range values (such as action gap values and trigger distance range values) of the non-contact limit switch can be accurately tested, the reliability of equipment is improved, and the safe and stable operation of a unit is ensured.
Disclosure of Invention
The invention aims to solve the technical problems that: the performance test platform for the non-contact limit switch is provided, a specific transverse and longitudinal action range value of the non-contact limit switch can be obtained, and the reliability of equipment is improved.
The invention provides a performance test platform for a non-contact limit switch, which comprises the following components:
the base is fixedly provided with a vertical screw rod;
the magnet objective table is connected with the base;
the side walls are fixed on the periphery of the base to form an independent space;
the vertical screw rod is also connected with a horizontal direction bottom plate, and the vertical hand wheel is connected with the vertical screw rod through a vertical transmission mechanism to realize the movement of the horizontal direction bottom plate in the vertical direction;
the limit switch fixing device is arranged on the horizontal screw rod;
the horizontal screw rod is controlled by a horizontal hand wheel to drive the limit switch fixing device to slide on the bottom plate in the horizontal direction;
the horizontal bottom plate is provided with scales; graduations are also arranged on the side wall.
Preferably, the vertical screw is arranged at eight positions in four directions and is fixed on the side wall;
two vertical screws are placed in each direction.
Preferably, the vertical hand wheel and the horizontal hand wheel are arranged in two directions perpendicular to each other.
Preferably, the magnet stage is disposed opposite to the horizontal base plate.
Preferably, the vertical transmission mechanism comprises a plurality of gears connected to each other.
Preferably, the vertical screw rods are driven by gears, so that 8 vertical screw rods run at the same speed and in the same direction.
Preferably, no structural shielding exists between the magnet objective table and the non-contact limit switch fixing device.
Preferably, the magnet stage is connected with the base through a screw.
Compared with the prior art, the performance test platform for the non-contact limit switch has the following beneficial effects:
1) The test platform simulates the actual work on site, is simple and convenient to use, can accurately obtain the accurate parameters of the working range of the non-contact limit switch, and determines whether the performance of the limit switch is stable or not through repeated tests;
2) The test platform provides a scientific and specific mode for measuring the performance of the limit switch, can be used for testing the qualification test of new replacement parts and repair parts, and provides data support for the reason analysis of fault parts;
3) The data obtained by the test platform can be used for the field actual installation work of the non-contact limit switch, the installation distance of the limit switch is embodied, the field work time is greatly reduced, the work efficiency is improved, and the test work is more scientific;
4) The test platform has stable structure, and the redundant structure is considered at the four corners of the vertical direction, so that the test platform is convenient to maintain, low in cost, high in practicability and not easy to damage.
Drawings
FIG. 1 shows a schematic structural diagram of a performance testing platform for a non-contact limit switch;
FIG. 2 shows an internal block diagram for a non-contact limit switch performance test platform;
FIG. 3 is a schematic view showing the structure of a horizontal moving member;
FIG. 4 shows a schematic view of a vertical drive mechanism;
in the drawing the view of the figure,
the device comprises a 1-vertical hand wheel, a 2-vertical lead screw, a 3-limit switch fixing device, a 4-horizontal hand wheel, a 5-magnet objective table, a 6-base, a 7-horizontal lead screw, an 8-horizontal bottom plate, a 9-gear and a 10-side wall.
Detailed Description
For a further understanding of the present invention, embodiments of the invention are described below in conjunction with the examples, but it should be understood that these descriptions are merely intended to illustrate further features and advantages of the invention, and are not limiting of the invention.
The non-contact limit switch is a device which can cause the contact switch to act after the moving part reaches a specific position so as to cause circuit switching, and the conditions of swing, displacement, deformation, bumping and grinding and the like are easy to occur in the field work. The test platform simulates the field working environment, and the accurate interval of triggering of the limit switch in the two directions is obtained by changing the horizontal and vertical positions of the limit switch, so that whether the limit switch can adapt to the influence caused by the field environment is judged.
The embodiment of the invention discloses a performance test platform for a non-contact limit switch, which is shown in fig. 1 and 2 and comprises the following components:
the base 6 is fixedly provided with a vertical screw rod 2;
the magnet objective table 5 is connected with the base 6;
the side wall 10 is fixed around the base 6 to form an independent space;
the vertical screw rod 2 is also connected with a horizontal direction bottom plate 8, and the vertical hand wheel 1 is connected with the vertical screw rod 2 through a vertical transmission mechanism to realize the movement of the horizontal direction bottom plate 8 in the vertical direction;
the limit switch fixing device 3 is arranged on the horizontal screw rod 7;
as shown in fig. 3, the horizontal screw rod 7 is controlled by the horizontal hand wheel 4 to drive the limit switch fixing device 3 to slide on the bottom plate 8 in the horizontal direction;
the horizontal bottom plate 8 is provided with scales; the side wall 10 is also provided with graduations.
The test platforms of the invention are all built on the base 6.
The magnet objective table 5 is fixed structure, and magnet objective table 5 passes through screw connection with base 6.
A vertical screw rod 2 is fixed on the base 6;
the vertical screw rod 2 is arranged at eight positions in four directions and is fixed on the side wall 10;
two vertical screws are placed in each direction, so that redundant configuration is considered, if a certain vertical screw has a problem, the base can be directly removed by unscrewing the screw, the operation is convenient, and the normal movement of other vertical screws and the vertical transmission mechanism can be ensured.
As shown in fig. 4, the vertical transmission mechanism includes a plurality of gears connected to each other.
The vertical screw rods 2 are driven by the gears 9, so that 8 vertical screw rods run at the same speed and in the same direction.
The horizontal bottom plate 8 is directly connected to the vertical screw rod 2, and the vertical hand wheel 1 is connected with the vertical screw rod 2 through a vertical transmission mechanism, so that the movement of the horizontal bottom plate 8 in the vertical direction is realized;
the horizontal screw rod 7 is controlled by the horizontal hand wheel 4 to drive the limit switch fixing device 3 to slide on the bottom plate 8 in the horizontal direction.
The vertical hand wheel 1 and the horizontal hand wheel 4 are arranged in two directions perpendicular to each other.
The magnet stage 5 is disposed opposite to the horizontal bottom plate 8.
The horizontal hand wheel, the horizontal direction bottom plate and the limit switch fixing device are easy to maintain and replace.
The whole device adopts the opening design, and there is not the structure to shelter from between magnet objective table 5 and the non-contact limit switch fixing device 3, prevents to shelter from the interference of thing to the magnetic field, prevents that limit switch circuit state from failing in time to change. The transmission mechanisms in the two directions are controlled by the hand wheel, so that the convenience and the micro-motion of an operator are improved, the data deviation caused by human factors is reduced, and the accuracy of the performance test of the non-contact limit switch is improved. And realize the hand wheel through gear structure and rotate horizontally and realize the vertical direction motion, accord with ordinary operation habit.
During testing, the magnet is placed on the magnet objective table 5 of the fixing device, the limit switch is placed on the limit switch fixing device 3, the vertical hand wheel 1 is rotated to drive the bottom plate 8 in the horizontal direction to move up and down through the vertical screw rod 2, and the whole horizontal direction transmission mechanism is built on the bottom plate in the horizontal direction, so that the limit switch fixing device 3 is driven to move in the vertical direction. Rotating the horizontal hand wheel 4 directly drives the limit switch fixing device 3 to move in the horizontal direction. The method can realize the function of changing the working position of the limit switch by the motion test platform, and a universal meter is added to the limit switch at the moment to judge whether the loop of the limit switch is closed or not, so that the accurate working range of the limit switch is obtained.
The non-contact limit switch testing platform is composed of a vertical motion transmission part and a horizontal motion transmission part, and scale marks are respectively carved in the two directions. The non-contact limit switch is matched with the circuit on-off test function of the universal meter to determine the state of the limit switch.
The non-contact limit switch and the magnet are respectively placed on a specific objective table and are fixed by using a binding belt. The limit switch is just attached to the magnet through the hand wheel in the horizontal direction and the vertical direction, and the scales are recorded at the moment and recorded as initial positions. The universal meter is connected into the limit switch circuit, and the limit switch fixing device is changed to disconnect the circuit.
The position of the limit switch fixing device is adjusted through a hand wheel, so that the site situation is simulated. And in the horizontal direction, recording the scale reading of the state change moment of the limit switch circuit, and subtracting the initial reading to obtain the minimum distance of the limit switch action in the horizontal direction. And in the vertical direction, rotating the hand wheel in the vertical direction, recording the scale reading at the moment when the limit switch circuit is just closed, continuously rotating the hand wheel in the same direction, recording the scale reading at the moment when the limit switch circuit is just opened, and comparing the two with the initial state data to obtain the action range of the limit switch in the vertical direction. The above operation is repeated in the opposite direction. The above operation is repeated several times, an average value is obtained, the measurement error is reduced, and meanwhile, whether the performance of the limit switch is stable or not is judged.
By the measuring method, the specific position value of the non-contact limit switch action can be accurately obtained, and the performance judgment and the field installation requirement of the limit switch can be met.
The above description of the embodiments is only for aiding in the understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A performance test platform for a non-contact limit switch, comprising:
the base is fixedly provided with a vertical screw rod;
the magnet objective table is connected with the base;
the side walls are fixed on the periphery of the base to form an independent space;
the vertical screw rod is also connected with a horizontal direction bottom plate, and the vertical hand wheel is connected with the vertical screw rod through a vertical transmission mechanism to realize the movement of the horizontal direction bottom plate in the vertical direction;
the limit switch fixing device is arranged on the horizontal screw rod;
the horizontal screw rod is controlled by a horizontal hand wheel to drive the limit switch fixing device to slide on the bottom plate in the horizontal direction;
the horizontal bottom plate is provided with scales; graduations are also arranged on the side wall.
2. The performance testing platform for a non-contact limit switch of claim 1, wherein the vertical lead screw is disposed at eight positions in four orientations and is fixed to a side wall;
two vertical screws are placed in each direction.
3. The performance testing platform for a non-contact limit switch of claim 1, wherein the vertical hand wheel and the horizontal hand wheel are disposed in two directions perpendicular to each other.
4. The performance testing platform for a non-contact limit switch of claim 1, wherein the magnet stage is disposed opposite the horizontal floor.
5. The performance testing platform for a non-contact limit switch of claim 1, wherein the vertical drive mechanism comprises a plurality of interconnected gears.
6. The performance test platform for the non-contact limit switch of claim 5, wherein the vertical screws are driven by gears, so that 8 vertical screws run at the same speed and in the same direction.
7. The performance testing platform for a non-contact limit switch of claim 1, wherein there is no structural shielding between the magnet stage and the non-contact limit switch fixture.
8. The performance testing platform for a non-contact limit switch of claim 1, wherein the magnet stage is screwed to the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310279814.2A CN115993529B (en) | 2023-03-22 | 2023-03-22 | Performance test platform for non-contact limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310279814.2A CN115993529B (en) | 2023-03-22 | 2023-03-22 | Performance test platform for non-contact limit switch |
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| Publication Number | Publication Date |
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| CN115993529A CN115993529A (en) | 2023-04-21 |
| CN115993529B true CN115993529B (en) | 2023-05-23 |
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| CN202310279814.2A Active CN115993529B (en) | 2023-03-22 | 2023-03-22 | Performance test platform for non-contact limit switch |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205981461U (en) * | 2016-08-29 | 2017-02-22 | 上海柔龙科技股份有限公司 | Non -contact temperature -detecting device |
| CN110018374A (en) * | 2019-04-11 | 2019-07-16 | 深圳市宏之都科技有限公司 | A kind of life test apparatus under simulated environment |
| CN213517958U (en) * | 2020-12-16 | 2021-06-22 | 江苏利核仪控技术有限公司 | Limit switch's functional test system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI413763B (en) * | 2010-04-06 | 2013-11-01 | Inventec Corp | Testing device and limiting switch thereof |
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- 2023-03-22 CN CN202310279814.2A patent/CN115993529B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205981461U (en) * | 2016-08-29 | 2017-02-22 | 上海柔龙科技股份有限公司 | Non -contact temperature -detecting device |
| CN110018374A (en) * | 2019-04-11 | 2019-07-16 | 深圳市宏之都科技有限公司 | A kind of life test apparatus under simulated environment |
| CN213517958U (en) * | 2020-12-16 | 2021-06-22 | 江苏利核仪控技术有限公司 | Limit switch's functional test system |
Non-Patent Citations (2)
| Title |
|---|
| 柱塞式限位开关参数测试系统的研制;陈硕;方晓乐;檀丛啸;;机械制造与自动化(第02期);第 221-225页 * |
| 自动化检修装置限位开关失效机理分析;高厚秀 等;《机械工程师》;第122-123页 * |
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