A terminal for ground reliability monitoring
Patent Information
- Application Number
- CN202522049633.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-23
AI Technical Summary
[0004]并且，在进行设备接地状态监测过程中，还存在由于被监测物体本身移走等不在位的情况，在这种情况下可能出现接地不可靠性的误报警，得到错误的监测信号
[0027]本实用新型的用于接地可靠性监测的终端，结构简单、成本低廉、安装方便、可靠性高且具有良好兼容性；在进行设备的接地状态监测时，可实现对接地状态监测所需有效监测信号的引出，便于接地可靠性的远程监测，特别适用于例如火工品等需要强可靠接地的设备或产品的接地可靠性监测。
Smart Images
Figure CN224907009U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of grounding monitoring technology, and in particular relates to a terminal for grounding reliability monitoring. Background Technology
[0002] In industrial production and equipment operation environments, the grounding status of equipment is crucial for ensuring equipment safety, stable operation, and the safety of maintenance personnel. However, missing, loose, or disconnected grounding wires pose hidden dangers that are difficult to detect or cannot be detected in a timely manner, thus increasing the risk of safety accidents. Therefore, the grounding status of equipment needs to be effectively monitored.
[0003] For equipment, including pyrotechnics, that requires highly reliable grounding but whose grounding reliability cannot or is not permitted to be monitored on the equipment itself, it is necessary to extract the grounding controllability monitoring signal to enable remote monitoring of situations such as missing, loose, or disconnected grounding wires.
[0004] Furthermore, during equipment grounding status monitoring, there are situations where the monitored object may be moved or out of place, potentially causing false alarms indicating unreliable grounding and resulting in incorrect monitoring signals. Such signals need to be eliminated.
[0005] Therefore, there is an urgent need for a terminal that is simple in structure, low in cost, easy to install, highly reliable, and has good compatibility, so as to extract the effective monitoring signals required for grounding status monitoring when monitoring the grounding status of equipment, and facilitate remote monitoring of grounding reliability. Utility Model Content
[0006] Based on the above analysis, this utility model aims to provide a terminal for grounding reliability monitoring, so as to realize the extraction of effective monitoring signals required for grounding status monitoring.
[0007] The objective of this utility model is mainly achieved through the following technical solutions:
[0008] This utility model discloses a terminal for grounding reliability monitoring, comprising a first cable, a first plug, an in-situ sensor, a second cable, and a second plug; wherein,
[0009] The first cable is a 4-core cable; one end of the first and second cores of the 4-core cable is connected to a position near the connection point of the original grounding wire on the monitored object; one end of the third and fourth cores is connected to a position different from the connection point of the original grounding wire and the grounding busbar; the other ends of the first, second, third and fourth cores are respectively connected to the corresponding core posts in the first plug;
[0010] The in-situ sensor is electrically connected to the second plug via a second cable, and the in-situ signal of the monitored object monitored by the in-situ sensor is output to the second plug via the second cable.
[0011] Furthermore, the first and third cores of the 4-core cable are connected to the positive and negative power supplies of the constant current source through the corresponding core posts in the first plug, while the second and fourth cores output positive and negative monitoring signals through the corresponding core posts in the first plug.
[0012] Furthermore, the in-situ sensor is fixed within the effective sensing area for in-situ monitoring of the monitored object by a fixed bracket; the sensing head is facing the monitored object.
[0013] Furthermore, the in-situ sensor is a photoelectric proximity sensor, a capacitive proximity sensor, an inductive proximity sensor, or an ultrasonic proximity sensor.
[0014] Furthermore, the monitored object is a pyrotechnic device, the first and second plugs are explosion-proof plugs, and the in-situ sensor is explosion-proof, all of which meet the IIBT4 requirements for use in explosion-proof environments.
[0015] Furthermore, the first cable is a 4-core RVV4x0.75 flexible cable, which is connected to the pyrotechnic device and the grounding busbar using copper connectors; wherein, the first and second cores of the first cable are connected to the terminals on the outer shell of the pyrotechnic device using copper connectors, and the third and fourth cores of the first cable are connected to the grounding busbar using copper connectors.
[0016] Furthermore, the first and second cables are located inside explosion-proof steel pipes.
[0017] This utility model also discloses a terminal for grounding reliability monitoring, wherein one terminal provides grounding reliability monitoring for multiple monitored objects; the terminal includes a first cable group, an in-situ sensor group, and a second cable group;
[0018] The first cable group includes the same number of first cables as the monitored grounding wires, with each first cable corresponding to one monitored grounding wire; the in-situ sensor group includes the same number of in-situ sensors as the monitored objects, with each in-situ sensor corresponding to one monitored object for in-situ monitoring; the second cable group includes the same number of second cables as the in-situ sensors; when each monitored object has only one monitored grounding wire, the number of cables in the first cable group and the second cable group is the same.
[0019] In the terminal for grounding reliability monitoring as described above, the first cable is connected in a certain way, and the in-situ sensor is connected to the second cable in a certain way. Each first cable is connected to the corresponding monitored object, and each in-situ sensor is connected to the corresponding second cable.
[0020] Furthermore, it also includes a first plug assembly and a second plug assembly; wherein,
[0021] The first plug group includes the same number of first plugs as the number of first cables in the first cable group; the first plugs are connected to the first cables in a one-to-one correspondence.
[0022] The second plug group includes the same number of second plugs as the second cables in the second cable group; the second plugs are connected to the second cables in a one-to-one correspondence.
[0023] Furthermore, it also includes a first plug and a second plug; wherein,
[0024] The first plug includes core posts with a number not less than the total number of core wires of all the first cables in the first cable group; each core wire of each first cable in the first cable group is connected to one of the core posts.
[0025] The second plug includes a number of core posts not less than the total number of core wires of all the second cables in the second cable group; each core wire of each second cable in the second cable group is connected to one of the core posts.
[0026] The beneficial effects that this utility model can achieve are as follows:
[0027] The terminal for grounding reliability monitoring of this utility model has a simple structure, low cost, convenient installation, high reliability and good compatibility. When monitoring the grounding status of equipment, it can extract the effective monitoring signal required for grounding status monitoring, which facilitates remote monitoring of grounding reliability. It is particularly suitable for grounding reliability monitoring of equipment or products that require strong and reliable grounding, such as pyrotechnics. Attached Figure Description
[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.
[0029] Figure 1 This is a schematic diagram of the connection of a terminal for grounding reliability monitoring in an embodiment of this utility model;
[0030] Figure 2 This is a schematic diagram showing the connection of a terminal that provides grounding reliability monitoring for four monitored objects in this embodiment of the present invention.
[0031] Reference numerals: 1-First plug, 2-First cable, 3-Second plug, 4-Second cable, 5-In-situ sensor, 6-Monitored object, 7-Grounding busbar, 8-Existing grounding wire. Detailed Implementation
[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and, together with the embodiments of the present invention, serve to illustrate the principles of the present invention.
[0033] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model,
[0034] All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.
[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 based on the specific circumstances.
[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] A specific embodiment of this utility model discloses a terminal for grounding reliability monitoring, such as... Figure 1 As shown, it includes a first cable, a first plug, an in-situ sensor, a second cable, and a second plug; wherein,
[0038] The first cable is a 4-core cable; one end of the first and second cores of the 4-core cable is connected to a position near the connection point of the original grounding wire on the monitored object; one end of the third and fourth cores is connected to a position different from the connection point of the original grounding wire and the grounding busbar; the other ends of the first, second, third and fourth cores are respectively connected to the corresponding core posts in the first plug;
[0039] The in-situ sensor is electrically connected to the second plug via a second cable, and the in-situ signal of the monitored object monitored by the in-situ sensor is output to the second plug via the second cable;
[0040] The monitored object can be a product, device, or equipment that requires reliable grounding.
[0041] In this embodiment, the method is applicable to the measurement of grounding resistance using a high-precision four-wire measurement method. When measuring grounding resistance, the first and third cores of the four-core cable are connected to the positive and negative power supply of the constant current source through the corresponding core posts in the first plug, and the second and fourth cores output positive and negative monitoring signals through the corresponding core posts in the first plug.
[0042] One end of the first and second cores is connected to a position near the connection point of the original grounding wire on the monitored object; one end of the third and fourth cores is connected to a position different from the connection point of the original grounding wire and the grounding busbar; this connection method ensures that the output monitoring signal is the resistance of the grounding wire from the monitored object to the grounding busbar.
[0043] The location near the connection point of the original grounding wire is generally within 5cm of the original grounding wire terminal on the outer shell of the monitored object. A terminal block is set within this range, and the first and second cores of the 4-core cable are connected to this terminal block.
[0044] One end of the third and fourth cores is connected to a different location from the connection point of the original grounding wire and the grounding busbar. The purpose of this is to prevent false monitoring events where the original grounding wire and the third and fourth cores are disconnected from the grounding busbar together when connected to the same point, thus mistakenly believing that the grounding is still good, thereby improving the reliability of monitoring.
[0045] By monitoring the presence signal of the monitored object using an in-situ sensor, grounding reliability monitoring can be performed only on the monitored object that is in place, preventing invalid grounding reliability monitoring after the monitored object has been removed. This improves the reliability of the monitoring data.
[0046] Specifically, the in-situ sensor is fixed within the effective sensing area for in-situ monitoring of the monitored object by a fixed bracket; the sensing head is facing the monitored object.
[0047] The effective sensing area is a range of 10mm to 400mm in front of the sensing head; when there is an object in this range, the in-situ sensor outputs an in-situ signal, otherwise it outputs an out-of-situ signal.
[0048] Preferably, the in-situ sensor is a photoelectric proximity sensor, a capacitive proximity sensor, an inductive proximity sensor, or an ultrasonic proximity sensor. The appropriate proximity sensor can be selected based on the specific equipment installation environment and monitoring requirements.
[0049] In another specific embodiment, the monitored object is a pyrotechnic device; the pyrotechnic device is stored on a pyrotechnic device support; since pyrotechnic devices have the potential to explode, this specific embodiment employs an intrinsically safe explosion-proof design; wherein,
[0050] All in-situ sensors are explosion-proof, with both the first and second plugs being explosion-proof, meeting the IIBT4 requirements for use in explosion-proof environments. Furthermore, the current flowing through the test cable in the first cable does not exceed 0.1mA, ensuring the safety of pyrotechnic devices. Through the control of a selector switch, current is output only during the test process, with no current output at other times.
[0051] Preferably, the in-situ sensor employs a dust and gas explosion-proof and interference-resistant photoelectric proximity sensor (also known as a photoelectric proximity switch); the light-emitting device and the photoelectric device are mounted in the same detection head in a certain direction. When a reflective surface (the object being detected) approaches, the photoelectric device receives the reflected light and outputs a signal, thus "sensing" the approach of an object and outputting an in-situ signal. The sensor is explosion-proof and meets explosion-proof requirements (IIBT4).
[0052] Preferably, the photoelectric proximity sensor is fixedly mounted below the pyrotechnic storage rack via a mounting bracket. The mounting bracket has a notched slot. When the photoelectric proximity sensor is inserted into the slot, its detection head is positioned directly above the pyrotechnic item. Once initially installed on the pyrotechnic storage rack, the mounting bracket is not removed; the photoelectric proximity sensor is simply removed when the product is changed. Moving the pyrotechnic storage rack also requires only removing the photoelectric proximity sensor from the notched slot.
[0053] When using a photoelectric proximity sensor, the second cable is a 3-core cable, with two cores connected to the power supply terminal and ground terminal of the photoelectric proximity sensor, respectively, and the other core connected to the signal output terminal of the photoelectric proximity sensor.
[0054] The first cable is a 4-core RVV4x0.75 flexible cable, which is connected to the pyrotechnic device and the grounding busbar using copper connectors. The first and second cores of the first cable are connected to the terminals on the outer shell of the pyrotechnic device using copper connectors, and the third and fourth cores of the first cable are connected to the grounding busbar using copper connectors.
[0055] Furthermore, to further achieve explosion protection, the first and second cables are placed inside explosion-proof steel pipes.
[0056] In another specific embodiment, a terminal for grounding reliability monitoring is also disclosed, wherein one terminal provides grounding reliability monitoring for multiple monitored objects; such as Figure 2As shown, this is an example of providing grounding reliability monitoring for four monitored objects. The terminal includes a first cable group, an in-situ sensor group, and a second cable group.
[0057] The first cable group includes the same number of first cables as the monitored grounding wires, with each first cable corresponding to one monitored grounding wire; the in-situ sensor group includes the same number of in-situ sensors as the monitored objects, with each in-situ sensor corresponding to one monitored object for in-situ monitoring; the second cable group includes the same number of second cables as the in-situ sensors; when each monitored object has only one monitored grounding wire, the number of cables in the first cable group and the second cable group is the same.
[0058] In the terminal for grounding reliability monitoring according to the above scheme, the connection method between the first cable and the monitored object, and the connection method between the in-situ sensor and the second cable, each first cable is connected to the corresponding monitored object, and each in-situ sensor is connected to the corresponding second cable.
[0059] Furthermore, in this scheme, as the number of cable cores increases, there are two design options for the plug: one is to use a plug group, and the other is to use a multi-core plug.
[0060] Specifically, the plug assembly method includes a first plug assembly and a second plug assembly; wherein,
[0061] The first plug group includes the same number of first plugs as the first cables in the first cable group; the number of core posts in each first plug is the same as the number of core wires in the first cable, and they are connected in a one-to-one correspondence.
[0062] The second plug group includes the same number of second plugs as the second cables in the second cable group; the number of core posts in each second plug is the same as the number of core wires in the second cable, and they are connected in a one-to-one correspondence.
[0063] Specifically, the multi-pin plug method includes a first plug and a second plug; among which,
[0064] The first plug includes core posts with a number not less than the total number of core wires of all the first cables in the first cable group; each core wire of each first cable in the first cable group is connected to one of the core posts.
[0065] The second plug includes a number of core posts not less than the total number of core wires of all the second cables in the second cable group; each core wire of each second cable in the second cable group is connected to one of the core posts.
[0066] In a specific implementation case, the grounding reliability of multiple pyrotechnic devices placed on a multi-station pyrotechnic device support is monitored.
[0067] In the corresponding terminal for grounding reliability monitoring, a sensor mounting bracket installed on a multi-position pyrotechnic device support connects each in-situ sensor in the sensor group to a specific pyrotechnic device. The sensor mounting bracket has a notched slot; when the photoelectric proximity sensor is inserted into the slot, its detection head faces the pyrotechnic device. Once the photoelectric proximity sensor is initially installed on the pyrotechnic device support, it is not removed; the photoelectric proximity switch is simply removed when the product is changed. Moving the pyrotechnic device support also simply involves removing the photoelectric proximity sensor from the notch in the slot.
[0068] Each second cable in the second cable group is connected at one end to the corresponding in-situ sensor and at the other end to a second plug in the second plug group.
[0069] One end of each first cable in the first cable group is connected to the corresponding pyrotechnic device and grounding busbar, and the other end is connected to a first plug in the first plug group.
[0070] Preferably, four pyrotechnic items can be grouped together, and their four first plugs and second plugs can be connected to the corresponding sockets on an explosion-proof box. The explosion-proof box can be equipped with necessary components for remote grounding reliability monitoring, including a constant current source, a switching component, and a communication component, to achieve grounding reliability monitoring of the pyrotechnic items.
[0071] In summary, the terminal for grounding reliability monitoring of this utility model has a simple structure, low cost, convenient installation, high reliability, and good compatibility; when monitoring the grounding status of equipment, it can extract the effective monitoring signals required for grounding status monitoring, which facilitates remote monitoring of grounding reliability.
[0072] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A terminal for grounding reliability monitoring, characterized in that, Includes a first cable, a first plug, an in-situ sensor, a second cable, and a second plug; wherein, The first cable is a 4-core cable; one end of the first and second cores of the 4-core cable is connected to a position near the connection point of the original grounding wire on the monitored object; one end of the third and fourth cores is connected to a position different from the connection point of the original grounding wire and the grounding busbar; the other ends of the first, second, third and fourth cores are respectively connected to the corresponding core posts in the first plug; The in-situ sensor is electrically connected to the second plug via a second cable, and the in-situ signal of the monitored object monitored by the in-situ sensor is output to the second plug via the second cable.
2. The terminal for grounding reliability monitoring according to claim 1, characterized in that, The first and third cores of the 4-core cable are connected to the positive and negative power supply of the constant current source through the corresponding core posts in the first plug, while the second and fourth cores output positive and negative monitoring signals through the corresponding core posts in the first plug.
3. The terminal for grounding reliability monitoring according to claim 1, characterized in that, The in-situ sensor is fixed in the effective sensing area for in-situ monitoring of the monitored object by a fixed bracket; the sensing head is facing the monitored object.
4. The terminal for grounding reliability monitoring according to claim 3, characterized in that, The in-situ sensor is a photoelectric proximity sensor, a capacitive proximity sensor, an inductive proximity sensor, or an ultrasonic proximity sensor.
5. The terminal for grounding reliability monitoring according to any one of claims 1-4, characterized in that, The monitored object is a pyrotechnic device, the first and second plugs are explosion-proof plugs, and the in-situ sensor is explosion-proof, all of which meet the IIBT4 requirements for use in explosion-proof environments.
6. The terminal for grounding reliability monitoring according to claim 5, characterized in that, The first cable is a 4-core RVV4x0.75 flexible cable, which is connected to the pyrotechnic device and the grounding busbar using copper connectors. The first and second cores of the first cable are connected to the terminals on the outer shell of the pyrotechnic device using copper connectors, and the third and fourth cores of the first cable are connected to the grounding busbar using copper connectors.
7. The terminal for grounding reliability monitoring according to claim 5, characterized in that, The first and second cables are located inside explosion-proof steel pipes.
8. A terminal for grounding reliability monitoring, characterized in that, One of the terminals provides grounding reliability monitoring for multiple monitored objects; the terminal includes a first cable group, an in-situ sensor group, and a second cable group. The first cable group includes the same number of first cables as the monitored grounding wires, with each first cable corresponding to one monitored grounding wire; the in-situ sensor group includes the same number of in-situ sensors as the monitored objects, with each in-situ sensor corresponding to one monitored object for in-situ monitoring; the second cable group includes the same number of second cables as the in-situ sensors; when each monitored object has only one monitored grounding wire, the number of cables in the first cable group and the second cable group is the same. In the terminal for grounding reliability monitoring as described in any one of claims 1-7, the connection method of the first cable and the connection method of the in-situ sensor and the second cable are such that each first cable is connected to the corresponding monitored object and each in-situ sensor is connected to the corresponding second cable.
9. The terminal for grounding reliability monitoring according to claim 8, characterized in that, It also includes a first plug assembly and a second plug assembly; wherein, The first plug group includes the same number of first plugs as the number of first cables in the first cable group; the first plugs are connected to the first cables in a one-to-one correspondence. The second plug group includes the same number of second plugs as the second cables in the second cable group; the second plugs are connected to the second cables in a one-to-one correspondence.
10. The terminal for grounding reliability monitoring according to claim 8, characterized in that, It also includes a first plug and a second plug; wherein, The first plug includes core posts with a number not less than the total number of core wires of all the first cables in the first cable group; each core wire of each first cable in the first cable group is connected to one of the core posts. The second plug includes a number of core posts not less than the total number of core wires of all the second cables in the second cable group; each core wire of each second cable in the second cable group is connected to one of the core posts.