Contact initial pressure detection device suitable for contactor
By introducing a distance measuring sensor and a data acquisition device into the contactor to detect the displacement change of the moving contact, the problem of low accuracy in contact initial pressure detection is solved, and efficient and accurate contact initial pressure measurement is achieved.
Patent Information
- Application Number
- CN202422827285.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-20
AI Technical Summary
In the prior art, the detection accuracy of the initial contact pressure is not high, and it is difficult to accurately determine the pressure value of the contactor contacts when they first come into contact.
The detection device consists of a contact bracket, a moving contact, a static contact, a contact spring, a moving iron core, a static iron core, a coil, a reaction spring and a distance sensor. The displacement change of the moving contact is detected by the distance sensor, and the initial pressure value is obtained by analysis combined with a data acquisition device.
High-precision detection of the initial contact pressure is achieved, which improves the accuracy and efficiency of detection.
Smart Images
Figure CN223376808U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a contact initial pressure detection device suitable for a contactor. Background Art
[0002] The connection process of low-voltage electrical contacts is often accompanied by mechanical vibration, which can generate arcs. Since the load current is often large during connection, the hazards of connection arcs can sometimes be quite serious, the most dangerous of which is contact welding.
[0003] Initial contact pressure refers to the pressure on each contact (or each contact for double-breakpoint applications) when the moving and stationary contacts first come into contact. When the contacts close, mechanical shock causes bounce, which can create a short arc between the contacts, increasing contact wear and even causing welding.
[0004] At present, the initial pressure of the contact is measured when the contact is in the position of just contacting. This position is generally difficult to fix. Because the initial pressure of the contact is formed by the pre-compression of the contact spring, it can also be measured when the contact is in the disconnected position. Finger contact pressure measurement method, such as Figure 1 As shown, a paper strip is sandwiched between the moving contact and its bracket, and the weight is gradually increased. When it can be gently pulled, the weight is the initial contact pressure. The initial pressure of the bridge contact can be measured in the same way. Alternatively, the contact spring can be removed and measured directly. Half of the pressure measured on the spring measuring instrument based on the pre-compression length is the contact pressure. However, this method is not very accurate.
[0005] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a new type of contact initial pressure detection device suitable for contactors, making it more valuable for industrial use. Utility Model Content
[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a contact initial pressure detection device suitable for a contactor.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A contact initial pressure detection device suitable for a contactor, comprising a contact bracket, a moving contact and a static contact, wherein the moving contact is connected to the top of the contact bracket, the moving contact and the static contact are arranged opposite to each other, a contact spring is connected inside the contact bracket, one end of the contact spring is connected to the top of the contact bracket, and the other end is connected to the moving contact, the lower end of the contact bracket is connected to the moving iron core, the lower part of the moving iron core is connected to the static iron core spaced therefrom, a coil is connected inside the static iron core, a reaction spring is connected between the moving iron core and the static iron core, and also includes a fixed bracket, a distance sensor for detecting the displacement of the moving contact is connected to the fixed bracket, the output end of the distance sensor is connected to the input end of the monitoring device, the output end of the contactor is connected to the input end of the detection module, and the output end of the detection module is connected to the input end of the monitoring device.
[0009] Preferably, in the contact initial pressure detection device applicable to a contactor, the monitoring device is an oscilloscope.
[0010] Preferably, in the contact initial pressure detection device applicable to a contactor, the sensor is a distance measurement displacement sensor.
[0011] Preferably, in the contact initial pressure detection device suitable for a contactor, the distance measuring displacement sensor is connected to the fixing bracket via an adjusting bolt.
[0012] By means of the above solution, the present invention has at least the following advantages:
[0013] The utility model can detect the initial pressure value to judge the corresponding numerical value, has higher accuracy and efficiency, greatly facilitates the test personnel and improves the detection efficiency.
[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.
[0016] Figure 1 It is a structural diagram of the prior art of the utility model;
[0017] Figure 2It is a structural diagram and a test circuit diagram of the utility model;
[0018] Figure 3 It is a line graph of detection data of the utility model. DETAILED DESCRIPTION
[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.
[0021] Example
[0022] like Figure 2 and Figure 3 As shown, a contact initial pressure detection device suitable for a contactor includes a contact bracket 2, a moving contact 3 and a static contact 4. The moving contact 3 is connected to the top of the contact bracket 2, and the moving contact 3 is arranged opposite to the static contact 4. A contact spring 1 is connected to the contact bracket 2, one end of the contact spring 1 is connected to the top of the contact bracket 2, and the other end is connected to the moving contact 3. The lower end of the contact bracket 2 is connected to the moving iron core 5, and the lower part of the moving iron core 5 is connected to the static iron core 8 spaced therefrom. A coil 7 is connected inside the static iron core 8, and a reaction spring 6 is connected between the moving iron core 5 and the static iron core 8. It also includes a fixed bracket 9, and a ranging displacement sensor 10 for detecting the displacement of the moving contact is connected to the fixed bracket 9. The output end of the ranging displacement sensor 10 is connected to the input end of the data acquisition device 11, and the output end of the contactor is connected to the input end of the data acquisition device 11.
[0023] The data acquisition device 11 in the present invention is a host computer with data acquisition and analysis functions, or other equipment and instruments with data acquisition and analysis functions.
[0024] The distance measuring displacement sensor of the utility model is connected to the fixed bracket by adjusting bolts, and can be appropriately fine-tuned to improve the position accuracy of the contactor to be detected.
[0025] The working principle of this utility model is as follows:
[0026] During specific operation, the moving contact moves downward through the contact spring and the contact bracket. During this process, due to inertia, the moving contact remains stationary, while the contact bracket compresses the spring and accelerates downward. Then, the moving contact accelerates downward along with the spring until it contacts the static contact. At this time, the displacement change of the moving contact over time is tested by the distance sensor (laser distance sensor) and plotted as curve ①. By taking the derivative of curve ① (v=ds / dt), the rate of change of displacement is obtained, which is a curve ② reflecting the change of velocity over time; by taking the derivative of curve ② (a=dv / dt), the rate of change of velocity is obtained, which is a curve ③ reflecting the change of acceleration over time: At the same time, the detection module can be used to obtain the time t when the moving contact contacts the static contact, and thus the acceleration value a at time t on curve ③;
[0027] The contact mass is known, so the initial pressure value at this time is F=ma, and the value of F can be known.
[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0029] In the description of this application, it should be noted that the terms "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0030] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0031] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A contact initial pressure detection device suitable for a contactor, characterized in that: The invention comprises a contact support (2), a moving contact (3) and a static contact (4), wherein the moving contact (3) is connected to the top of the contact support (2), the moving contact (3) and the static contact (4) are arranged opposite to each other, a contact spring (1) is connected inside the contact support (2), one end of the contact spring (1) is connected to the top of the contact support (2), and the other end thereof is connected to the moving contact (3), the lower end of the contact support (2) is connected to the moving iron core (5), the lower end of the moving iron core (5) is connected to a static iron core (8) spaced therefrom, a coil (7) is connected inside the static iron core (8), a reaction spring (6) is connected between the moving iron core (5) and the static iron core (8), and a fixed support (9) is also included, the fixed support (9) is connected to a sensor for detecting the displacement of the moving contact, the output end of the sensor (10) is connected to the input end of a data acquisition device (11), and the output end of the contactor is connected to the input end of the data acquisition device (11).
2. A contact initial pressure detection device for a contactor according to claim 1, characterized in that: The sensor is a distance measuring displacement sensor (10).
3. A contact initial pressure detection device for a contactor according to claim 2, characterized in that: The distance measuring displacement sensor (10) is connected to the fixed bracket (9) via an adjusting bolt.