A device for monitoring the number of times of plugging and unplugging of a two-hole and three-hole socket

Abstract

The utility model relates to a kind of device for monitoring the plug-in times of two-hole and three-hole socket, be set on the bottom plate in socket, comprising: mainboard, with the bottom plate up-down stack connection, the mainboard includes at least one of three-hole test part and two-hole test part, the three-hole test part is used to detect three-hole socket, the two-hole test part is used to detect two-hole socket;A plurality of tactile switches, set on the mainboard, the tactile switch is used to detect the plug-in state of socket;PLC control unit, fixed on the mainboard, the PLC control unit is triggered signal by the tactile switch Statistics socket's plug-in times.The utility model discloses the device for monitoring the plug-in times of two-hole and three-hole socket, adopt tactile switch, directly capture abnormal deformation of spring leaf one side ≥1mm, detection accuracy is improved 25 times, false alarm rate ≤5%, and real-time trigger sound light alarm, realize early fault early warning.

Description

Technical Field

[0001] This utility model belongs to the field of plug and socket technology, specifically relating to a device for monitoring the number of times two-hole and three-hole sockets are plugged in and unplugged. Background Technology

[0002] As a basic power interface device, the weakening of the clamping force of the spring contacts in sockets has become a core cause of electrical fires and equipment damage. When copper alloy spring contacts experience fatigue expansion and deformation of ≥1mm, the clamping force drops sharply to 38%-42% of the initial value, causing the contact resistance to surge to 3-5 times the normal value. Under a 16A load, the temperature rise can reach 80-100℃, posing a significant safety hazard. In scenarios such as rail transit and data centers, sockets are densely deployed and concealed, making manual full inspection cost over 5000 yuan per 100 sockets per inspection, with no real-time warning available. Furthermore, the number of insertions and removals is strongly correlated with the lifespan of the spring contacts, but existing products lack accurate counting and lifespan prediction functions, leading to passive maintenance.

[0003] Current industry monitoring technologies have significant limitations: manual inspection relies on periodic manual testing, with a testing cycle of 1-3 months per instance, resulting in insufficient efficiency and timeliness; impedance monitoring alarms based on circuit impedance thresholds, but cannot distinguish between spring deformation and plug oxidation, leading to a false alarm rate of over 30%.

[0004] In published patent applications, such as Chinese Invention Patent Application Publication No. CN111879506A, a socket life testing device is disclosed, including a base with a socket cavity inside. A buffer cavity is provided on the rear wall of the socket cavity, with its opening facing forward. A buffer slider is slidably mounted on the buffer cavity, and a spring is provided between the rear side of the buffer slider and the rear wall of the buffer cavity. However, this device is used for actively testing the clamping force and connection status of the socket, and cannot achieve automatic counting of insertion and removal times or real-time monitoring of spring loosening status in actual use scenarios.

[0005] Comprehensive analysis reveals three major shortcomings in the existing solution: In terms of detection accuracy, the impedance method is greatly affected by environmental interference; in terms of economy, manual inspection costs are 6-8 times higher than intelligent solutions; and in terms of functional integrity, there is a lack of early warning correlation between the number of insertions / removals and the remaining lifespan.

[0006] To address the aforementioned technical problems in the existing technology, this utility model provides a device for monitoring the number of times two-hole and three-hole sockets are plugged in and unplugged. Utility Model Content

[0007] The present invention adopts the following technical solution: The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to this utility model is installed on the base plate inside the socket and includes: The motherboard is fixedly mounted on the base plate. The motherboard includes at least one of a three-hole test section and a two-hole test section. The three-hole test section is used to detect the socket spring corresponding to the three-hole socket, and the two-hole test section is used to detect the socket spring corresponding to the two-hole socket. Several tactile switches are disposed on the motherboard, and the tactile switches are used to detect the plugging and unplugging status of the socket; The PLC control unit is fixed on the motherboard. The PLC control unit counts the number of times the socket is plugged in and unplugged through the trigger signal of the tactile switch.

[0008] Furthermore, the motherboard has an H-shaped structure, and both the three-hole test section and the two-hole test section have an n-shaped structure. The motherboard is extended in series from front to back by plugging or soldering.

[0009] Furthermore, in the three-hole test section, the tactile switch is located on one side of the socket spring at the live wire, on the other side of the socket spring at the neutral wire, and on the other side of the socket spring at the ground wire; in the two-hole test section, the tactile switch is located on one side of the socket spring at the neutral wire and on the other side of the socket spring at the live wire.

[0010] Furthermore, the tactile switch and the spring head of the socket spring on the base plate are disposed on the same horizontal plane.

[0011] Furthermore, the motherboard is connected to the base plate via a pin header and nut header structure. The pin header and nut header structure consists of two 2×2P pin headers and nut headers with a spacing of 2mm. The pin headers are soldered to the bottom of the motherboard, and the nut headers are disposed on the base plate.

[0012] Furthermore, the PLC control unit is connected to an external alarm module, which includes an audible and visual alarm and a wireless transmission unit.

[0013] Furthermore, the trigger pressure of the tactile switch is 80±5gf, and the trigger stroke is 0.25±0.02mm.

[0014] Furthermore, the tactile switch is fixed 0.2mm inward from the normal expansion position of the spring head of the socket spring.

[0015] Furthermore, the tactile switch is located below the socket spring, and the tactile switch is triggered when the plug is inserted and pressed down.

[0016] Furthermore, the motherboard is equipped with a current detector, which is electrically connected to the socket contact spring. The current detector is used to detect the current flowing through the socket contact spring.

[0017] The superior technical effects of this utility model are as follows: 1. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets described in this utility model uses a miniature tactile switch as the sensing core, which can directly and sensitively capture the abnormal expansion deformation displacement of ≥1mm on one side of the spring contact. Compared with traditional detection methods, its detection accuracy is significantly improved by up to 25 times.

[0018] 2. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets described in this utility model achieves a compact layout of the core detection function through a touch switch and a double-layer stacked structure of the main board and the base plate. It can perfectly integrate the detection and early warning function in a limited space without changing the original physical size and interface specifications of the socket, thus realizing a plug-and-play upgrade solution.

[0019] 3. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets described in this utility model adopts a highly modular design structure on the main board, supports flexible stacking in the front and rear directions, and has strong versatility and adaptability. It can quickly adapt to different types of socket products (such as different numbers of holes and structural forms), simplifying the production and maintenance process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front of the base plate; Figure 2 This is a schematic diagram of the motherboard's 3D structure. Figure 3 This is a schematic diagram of the planar structure of the base plate; Figure 4 A 3D schematic diagram of the socket contact spring; Figure 5 This is a 3D diagram of the inside of the socket.

[0021] In the diagram: 1 - base plate, 2 - socket spring, 3 - main board, 4 - tactile switch, 5 - female connector, 6 - socket spring soldering position, 7 - spring head, 8 - spring bottom, 9 - spring soldering point. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0023] like Figures 1 to 4 As shown, this utility model provides a device for monitoring the number of times two-hole and three-hole sockets are inserted and removed, which is installed on the base plate 1 inside the socket.

[0024] like Figure 1 and Figure 3As shown, the base plate 1 inside the socket, taking a partial example of a three-hole and a two-hole socket base plate, is provided with a socket spring 2 on the base plate 1, and the socket spring 2 is welded to the socket spring welding position 6. Figure 3 (Not shown), the base plate 1 and the main plate 3 are connected by a pin header and socket structure. The base plate 1 is equipped with a socket interface 5. The base plate 1 adopts a copper plating soldering process: the live wire, neutral wire and ground wire routing areas are opened with copper plating, and the tin plating layer thickness is ≥0.1mm to ensure stable 16A current carrying capacity. The circuit on the base plate 1 has been verified to be normal after 72 hours of 220V / 16A load.

[0025] like Figure 4 As shown, the socket spring 2 includes a spring head 7, a spring bottom 8, and a spring welding point 9, which is welded to the socket spring welding position 6.

[0026] like Figure 2 As shown, the device for monitoring the number of insertions and removals of two-prong and three-prong sockets includes: The motherboard 3 is connected to the base plate 1 in a stacked manner and its position is fixed by a pin header and socket structure. The motherboard 3 includes at least one of a "three-hole test section" for testing three-hole sockets or a "two-hole test section" for testing two-hole sockets. The motherboard adopts a modular design and can be expanded by connecting or soldering in series. Figure 2 The motherboard 3 shown includes a "three-hole test section" and a "two-hole test section". Both the three-hole test section and the two-hole test section are n-shaped structures, and the motherboard 3 as a whole has an H-shaped structure. Several tactile switches 4 are mounted on the main board 3 to count the number of times the socket is plugged in and out. The contacts and spring heads 7 of the tactile switches 4 are all on the same horizontal plane. The tactile switches 4 are located 0.2mm inward from the normal expansion position of the socket spring 2. When calibrating the normal expansion position of the socket spring 2, a socket spring 2 with a thickness of 1.4mm should be used, compatible with 1.4mm / 1.6mm socket spring 2 specifications. In terms of specific layout, in the three-hole test section, the tactile switches 4 have three independently configurable points, corresponding to the live wire, neutral wire, and ground wire, respectively. A maximum of 3 points or a minimum of 1 point can be configured as needed. The points of the tactile switches 4 are on the live wire side, the neutral wire side, and the ground wire side. Generally, the neutral wire and live wire positions are selected to ensure accurate counting of plugging and unplugging times, avoid incorrect counting of plugging and unplugging times when the ground wire is missing, and also avoid the influence of individual three-pin plug misalignment on the judgment. In the two-hole test section, the tactile switches 4 are only located on the neutral wire side and the live wire side. Due to the limited internal space of the socket and the extremely high measurement accuracy requirements, it is necessary to detect the state where the socket spring 2 expands by only 1mm on one side after normal expansion. Therefore, a tactile switch 4, model TS-1133-BA (brand name: XKB Connection), was selected. The tactile switch has a size of 3mm × 4.5mm, an actuation stroke of 0.25±0.02mm, and an actuation pressure of 80±5gf. It is suitable for applications with compact space and high limit accuracy requirements, and can effectively detect the minute expansion changes of the socket spring 2.

[0027] In one specific embodiment, the interior of the socket is as follows: Figure 5 As shown, since the socket spring 2 is fixed inside the plastic part, the tactile switch cannot be triggered if it is placed on both sides of the socket spring 2. Therefore, the tactile switch is set below the socket spring 2, with its contact facing the plug insertion direction.

[0028] In one specific embodiment, a current detector located on the motherboard 3 is electrically connected to the socket contact 2 to monitor the current flowing through the socket contact 2. The PLC control unit combines the signals from the current detector and the tactile switch 4 to calculate the equivalent number of insertions and removals. Considering that the plugs in some sockets, such as those connecting industrial machinery, computers, televisions, air conditioners, and other household appliances, are usually not unplugged, it is difficult to determine the insertion and removal actions based solely on the tactile switch 4. Therefore, a comprehensive judgment strategy is adopted: if the current detector detects current and the tactile switch 4 does not trigger a signal within a certain period of time before and after, it is determined that the plug has not been unplugged for a long time. At this time, the system converts the continuous insertion time of the plug into the equivalent number of insertions and removals based on an empirical formula, thereby assessing and reflecting the actual health status of the socket.

[0029] The PLC control unit is fixed on the motherboard 3. It counts the number of times the socket is plugged in and unplugged and determines the looseness of the socket spring 2 by using the trigger signal of the touch switch 4 and the built-in working logic. The bottom of the motherboard 3 is provided with two sets of 2×2P pin headers with a spacing of 2mm (not shown in the figure). The pin headers adopt a symmetrical layout anti-offset design and are used to connect with the corresponding female header interface 5 on the base plate 1. The pin headers and female header interface 5 are soldered to the motherboard and the base plate using special tooling to ensure that the horizontal offset is controlled within ≤0.1mm after assembly. The mainboard 3 has a 4P external socket (not shown in the figure) for connecting the PLC control unit and external devices, so as to output signals to the external alarm module and cloud control system to display the socket status.

[0030] Working logic and detection methods of PLC control units: Number of plug-in / plug-out cycles: Principle: When the plug is inserted, the socket spring 2 expands normally, triggering the tactile switch 4; Statistical logic: When tactile switch 4 is triggered, the PLC control unit records one valid insertion / removal. Key anti-false alarm mechanism: After detecting that tactile switch 4 has been triggered, the PLC control unit will check whether other tactile switches 4 at the same hole position have also been triggered simultaneously. If they are triggered simultaneously, a single insertion / removal is recorded. The core purpose of this mechanism is to effectively eliminate false alarms caused by external factors such as misalignment of the plug itself or abnormal insertion angle, which may lead to abnormal expansion of the socket spring 2 on one side. When the PLC control unit detects that the number of insertions / removals in a single hole has reached a preset threshold (e.g., 10,000 times), the following linkage operation will be executed: Event logging: Automatically records detailed information such as the time of occurrence of abnormal events and the corresponding hole location; Local alert: Immediately activate the on-site audible and visual alarm device to provide real-time on-site notification; Remote alarm: Simultaneously send remote alarm information to the monitoring center or designated personnel to achieve multi-terminal notification; Work order generation: When the number of single-hole insertion and removal exceeds the preset threshold (such as 10,000 times) or triggers the loosening alarm of the socket spring 2, the maintenance work order generation function is automatically triggered to promote the subsequent maintenance process.

[0031] Technical effectiveness verification: Reliability: After 5,000 insertion and removal tests, the false alarm rate is ≤0.1%.

[0032] This utility model is not limited to the above-described embodiments. Any modifications, improvements, or substitutions that can be conceived by those skilled in the art without departing from the essential content of this utility model shall fall within the protection scope of the claims of this utility model.

Claims

1. A device for monitoring the number of insertions and removals of two-prong and three-prong sockets, characterized in that, The base plate installed inside the socket includes: The motherboard is fixedly mounted on the base plate. The motherboard includes at least one of a three-hole test section and a two-hole test section. The three-hole test section is used to detect the socket spring corresponding to the three-hole socket, and the two-hole test section is used to detect the socket spring corresponding to the two-hole socket. Several tactile switches are disposed on the motherboard, and the tactile switches are used to detect the plugging and unplugging status of the socket; The PLC control unit is fixed on the motherboard. The PLC control unit counts the number of times the socket is plugged in and unplugged through the trigger signal of the tactile switch.

2. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The motherboard has an H-shaped structure, and both the three-hole test section and the two-hole test section have an n-shaped structure. The motherboard is extended in series from front to back by plugging or soldering.

3. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, In the three-hole test section, the tactile switch is located on one side of the socket spring at the live wire, on the other side of the socket spring at the neutral wire, and on the other side of the socket spring at the ground wire; in the two-hole test section, the tactile switch is located on one side of the socket spring at the neutral wire and on the other side of the socket spring at the live wire.

4. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The tactile switch and the socket spring head on the base plate are positioned on the same horizontal plane.

5. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The motherboard is connected to the base plate via a pin header and nut header structure. The pin header and nut header structure consists of two 2×2P pin headers and nut headers with a spacing of 2mm. The pin headers are soldered to the bottom of the motherboard, and the nut headers are located on the base plate.

6. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The PLC control unit is connected to an external alarm module, which includes an audible and visual alarm and a wireless transmission unit.

7. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The trigger pressure of the tactile switch is 80±5gf, and the trigger stroke is 0.25±0.02mm.

8. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 4, characterized in that, The tactile switch is fixed 0.2mm inward from the normal expansion position of the spring head of the socket contact.

9. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The tactile switch is located below the socket spring contact. When the plug is inserted, the plug is pressed down to trigger the tactile switch.

10. The device for monitoring the number of insertions and removals of two-hole and three-hole sockets according to claim 1, characterized in that, The motherboard is equipped with a current detector, which is electrically connected to the socket contact spring. The current detector is used to detect the current flowing through the socket contact spring.

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