Anti-interference elevator system testing device
By designing a shielded testing chamber and testing components in the elevator system testing device, the problem of traction motor noise interference was solved, thus achieving accuracy and safety in elevator system performance testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SJEC RES INST CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-29
AI Technical Summary
In existing elevator system testing, the high-frequency harmonic currents, eddy current effects, and broadband electromagnetic noise caused by commutation sparks generated during traction motor operation lead to inaccurate electromagnetic compatibility performance and pose safety hazards.
Design an anti-interference elevator system testing device, including a shielded testing chamber and testing components. The traction components are arranged outside the shielded testing chamber, which adopts a double-layer metal shielding layer and an electromagnetic sealing door. The traction components are connected to the elevator system through pre-embedded cables to avoid the influence of the traction components on the test results.
This improves the accuracy of elevator system performance testing, avoids interference from traction components on test results, and ensures the reliability and safety of test results.
Smart Images
Figure CN224298634U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an anti-interference elevator system testing device, belonging to the field of elevator technology. Background Technology
[0002] As a core component of modern buildings and urban infrastructure, elevator systems provide safe, efficient, and intelligent vertical transportation services. By controlling the traction machine to drive the balanced movement of the car and counterweight, elevator systems quickly and smoothly transport people or goods to different floors, greatly improving the utilization efficiency of building space. Among these components, the electromagnetic compatibility (EMC) performance of the frequency converter, a core component of the elevator system, is a crucial technical indicator ensuring the safe and stable operation of the elevator, and its role extends throughout the entire lifecycle of the elevator system.
[0003] However, in existing elevator system tests, when the traction motor is running, the high-frequency harmonic current of the stator winding, the eddy current effect of the rotor bars, and the commutation sparks will generate broadband electromagnetic noise. This noise, after being reflected and superimposed in the dark room, significantly increases the background electromagnetic field strength, resulting in inaccurate electromagnetic compatibility performance of the frequency converter and posing a safety hazard. Utility Model Content
[0004] The purpose of this invention is to provide an anti-interference elevator system testing device to solve the above-mentioned problems.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-interference elevator system testing device, the anti-interference elevator system testing device comprising:
[0006] A shielded testing chamber, which contains a testing space;
[0007] A detection component is arranged within the test space, and the detection component is used to detect the electromagnetic compatibility of the elevator system.
[0008] The traction assembly is arranged outside the shielded testing chamber and is connected to the elevator system via electrical terminals arranged inside the shielded testing chamber. The electrical terminals are also connected to the testing assembly.
[0009] Furthermore, the inner wall of the shielded testing chamber is provided with a double-layer metal shielding layer, which includes an inner copper mesh and an outer galvanized steel plate arranged sequentially from the surface of the wall.
[0010] Furthermore, the shielded testing chamber also includes an electromagnetically sealed shielded door, which is equipped with a pneumatically assisted locking structure.
[0011] Furthermore, the detection component is a frequency converter detection platform.
[0012] Furthermore, the electrical terminal is provided with a circular through hole, and a pre-embedded cable is installed inside the through hole. The pre-embedded cable connects the traction assembly and the elevator system.
[0013] Furthermore, the opening of the circular through hole is provided with a sealing disc, which is fixed to the opening of the circular through hole by a pair of screws.
[0014] Furthermore, an encoder interface is also provided on the electrical terminal, and the encoder interface is connected to the signal of the elevator control system.
[0015] Furthermore, the pre-embedded cable is buried under the floor and extends to the outside of the shielded testing chamber.
[0016] The beneficial effects of this utility model are as follows: By arranging the traction component outside the shielded testing chamber, this application only requires the elevator system to be arranged in the shielded testing chamber and connected to the test component and the traction component respectively. This not only enables performance testing of the elevator system, but also avoids the influence of the traction component on the test results of the elevator system, thus improving the accuracy of the test results.
[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of an anti-interference elevator system testing device according to an embodiment of this application;
[0019] Figure 2 This is a schematic diagram of the electrical wiring terminals of the anti-interference elevator system testing device of this application. Detailed Implementation
[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, in this utility model, unless otherwise explicitly specified and limited, "on" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium.
[0024] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0025] Please refer to Figures 1 to 2 An embodiment of this application shows an anti-interference elevator system testing device, which includes a shielded testing chamber 10, a testing component, and a traction component 20. A testing space is formed within the shielded testing chamber 10.
[0026] The testing components are arranged in the test space and are used to test the electromagnetic compatibility of the elevator system.
[0027] The traction assembly 20 is located outside the shielded testing chamber 10 and is connected to the elevator system signal via electrical terminals 12 located inside the shielded testing chamber 10. The electrical terminals 12 are also connected to the testing assembly signal. The traction machine motor in the traction assembly 20 is the biggest contributor to electromagnetic interference. Magnetic absorbing materials, such as nickel-zinc ferrite plates, can be placed around the traction machine motor to absorb low-frequency magnetic field radiation.
[0028] In one embodiment, the inner wall of the shielded testing chamber 10 is provided with a double-layer metal shielding layer, which includes an inner copper mesh and an outer galvanized steel plate arranged sequentially from the wall surface. The joints between adjacent outer galvanized steel plates are argon arc welded to ensure shielding effectiveness. Furthermore, the double-layer metal shielding layer is independently grounded to avoid coupling interference caused by sharing a ground with the elevator power system.
[0029] In one embodiment, the shielded testing chamber 10 further includes an electromagnetically sealed shielding door 11, which is equipped with a pneumatically assisted locking structure. This facilitates entry and exit while improving the shielding effect.
[0030] In one embodiment, the detection component is a frequency converter detection platform. The frequency converter detection platform is insulated from the double-layer metal shielding layer to avoid electromagnetic interference.
[0031] In one embodiment, a circular through hole 122 is arranged on the electrical terminal 12, and a pre-embedded cable 123 is installed inside the through hole 122. The pre-embedded cable 123 connects the traction assembly 20 and the elevator system. The connection through the pre-embedded cable 123 ensures that the entire test system can operate normally.
[0032] In one embodiment, a sealing disc 124 is provided at the opening of the circular through hole 122. The sealing disc 124 is fixed to the opening of the circular through hole 122 by a pair of screws. During testing, one screw is loosened and the sealing disc 124 is removed to facilitate the interconnection of the traction assembly 20, the elevator system, and the test assembly. After the test, the pre-embedded cable 123 can be stored in the electrical terminal 12. The circular through hole 122 is sealed by the sealing disc 124 to avoid affecting the test process during other tests.
[0033] In one embodiment, an encoder interface 121 is also arranged on the electrical terminal 12, and the encoder interface 121 is connected to the elevator control system signal. This arrangement facilitates the connection between the frequency converter testing platform and the elevator control system signal for testing.
[0034] In one embodiment, the pre-embedded cable 123 is buried under the floor and extends to the outside of the shielded testing chamber 10. This arrangement avoids the need to drill holes in the wall to run the cable, thus improving the shielding effect of the shielded testing chamber 10.
[0035] This application arranges the traction assembly outside the shielded testing chamber. Only the elevator system needs to be placed in the shielded testing chamber and connected to the test assembly and traction assembly respectively. This not only enables performance testing of the elevator system, but also avoids the influence of the traction assembly on the elevator system test results, thus improving the accuracy of the test results.
[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A test device for an anti-interference elevator system, characterized in that, The anti-interference elevator system testing device includes: A shielded testing chamber, which contains a testing space; A detection component is arranged within the test space, and the detection component is used to detect the electromagnetic compatibility of the elevator system. The traction assembly is arranged outside the shielded testing chamber and is connected to the elevator system via electrical terminals arranged inside the shielded testing chamber. The electrical terminals are also connected to the testing assembly.
2. The anti-interference elevator system testing device as described in claim 1, characterized in that, The inner wall of the shielded testing chamber is provided with a double-layer metal shielding layer, which includes an inner copper mesh and an outer galvanized steel plate arranged sequentially from the surface of the wall.
3. The anti-interference elevator system testing device as described in claim 2, characterized in that, The shielded testing chamber also includes an electromagnetically sealed shielded door, which is equipped with a pneumatically assisted locking structure.
4. The anti-interference elevator system testing device as described in claim 1, characterized in that, The detection component is a frequency converter detection platform.
5. The anti-interference elevator system testing device as described in claim 1, characterized in that, The electrical terminal is provided with a circular through hole, and a pre-embedded cable is installed in the through hole. The pre-embedded cable connects the traction assembly and the elevator system.
6. The anti-interference elevator system testing device as described in claim 5, characterized in that, The opening of the circular through hole is provided with a sealing disc, which is fixed to the opening of the circular through hole by a pair of screws.
7. The anti-interference elevator system testing device as described in claim 6, characterized in that, An encoder interface is also provided on the electrical terminal, and the encoder interface is connected to the elevator control system signal.
8. The anti-interference elevator system testing device as described in claim 5, characterized in that, The pre-embedded cable is buried under the floor and extends to the outside of the shielded testing room.