RFID tag for underground pipeline inspection
By using a glass protective shell and desiccant cartridge in the design of RFID tags, the problem of easy corrosion of tags in underground pipeline environments is solved, achieving the effect of corrosion resistance and convenient fixation of tags.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN CARDS INTELLIGENT TECH CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-01
AI Technical Summary
Existing RFID tags are susceptible to corrosion in underground pipeline environments, which affects their service life.
The RFID tag body is encapsulated in a glass protective shell and glass cover, and is equipped with a desiccant container to absorb moisture. It is combined with a magnetic ring and a fixing pad to facilitate fixing to different pipes.
It improves the corrosion resistance and convenience of RFID tags, ensures that the tags work normally in humid environments, and can be easily replaced and fixed to various pipes.
Smart Images

Figure CN224190503U_ABST
Abstract
Description
An RFID tag for underground pipeline inspection Technical Field
[0001] This utility model relates to the field of RFID tag technology, specifically an RFID tag for underground pipeline inspection. Background Technology
[0002] my country has achieved new breakthroughs in the research and development of key Internet of Things (IoT) technologies, which have begun to be applied in various fields such as agriculture, public safety, urban transportation, and healthcare. The management and application of RFID technology in underground pipeline marking and inspection has also been increasingly prioritized by underground pipeline management departments in recent years. It has also achieved good applications in fields such as gas, water supply, and communications. RFID technology is based on a transformer coupling model in the low-frequency band and a spatial coupling model for radar target detection in the high-frequency band. RFID is classified by power supply method into active and passive cards; by carrier frequency into low-frequency, medium-frequency, and high-frequency RFID cards; by modulation method into active and passive; and by operating distance into closely coupled cards (operating distance less than 1cm), close-coupled cards (operating distance less than 15cm), loosely coupled cards (operating distance approximately 1m), and long-range cards (operating distance from 1m to 10m or even further). Underground electronic markers used in underground pipelines are generally low-frequency, passive, and loosely coupled cards, which differ from commonly used RFID cards on the market.
[0003] Currently, the casing of RFID cards is generally made of plastic. In underground pipeline environments, this can lead to long-term corrosion of the RFID cards, affecting the use of the RFID tags inside. To address this, we have proposed an RFID tag for underground pipeline inspection. Summary of the Invention
[0004] The purpose of this invention is to provide an RFID tag for underground pipeline inspection, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] An RFID tag for underground pipeline inspection includes a glass protective shell with an opening at the top. A boss is fixedly installed inside the glass protective shell, and a protective pad is fixedly installed on the top of the boss. A glass cover is installed on the top of the opening. A placement chamber is opened inside the glass protective shell, and a limiting plate is fixedly installed inside the placement chamber. An RFID tag body is positioned between opposite sides of the limiting plate. The bottom of the glass cover fits against the boss, and a threaded cylinder is fixedly installed on the top of the glass cover. A glass bolt is threadedly connected to the top of the threaded cylinder.
[0007] Preferably, a rotating plate is fixedly provided on the top of the glass bolt. The rotating plate is rectangular and has rotating grooves on both sides.
[0008] The above solution, by setting a screwing groove, makes it easier to rotate the screwing plate.
[0009] Preferably, a column is fixedly installed inside the placement chamber, and the top of the column is provided with a threaded groove.
[0010] The above solution allows for the creation of threaded grooves at the top of the column by setting up a support column.
[0011] Preferably, the threaded groove and one end of the glass plug are threaded together, and a placement cylinder is fixedly installed inside the placement chamber.
[0012] The above solution allows the desiccant pack to be placed inside a placement cylinder.
[0013] Preferably, the outer surface of the placement cylinder has an annular opening, and a protective net is fixedly installed inside the annular opening.
[0014] The above solution, by setting an annular opening, allows the desiccant pack to absorb moisture passing through the annular opening, thus keeping the inside of the device dry.
[0015] Preferably, a magnetic ring is fixedly provided at the bottom of the glass protective shell, and a fixing pad is fixedly provided at the bottom of the glass protective shell.
[0016] The above solution, by setting a magnetic ring, makes it easy for the device to adhere to the metal pipe.
[0017] Preferably, the fixing pad is located in the middle of the magnetic ring, and a fixing adhesive layer is fixedly provided on the top of the fixing pad.
[0018] The above solution, by setting a fixing pad and a fixing adhesive layer, enables the device to adhere to non-metallic pipes.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] 1. This RFID tag for underground pipeline inspection utilizes a combination of a glass protective shell and a glass cover to encapsulate the RFID tag body within the shell. The glass shell material is corrosion-resistant, protecting the internal RFID tag body from erosion. Simultaneously, a placement cylinder allows a desiccant to absorb moisture, working in conjunction with the seal of the glass shell and cover to provide a dry environment for the RFID tag body. Furthermore, when the RFID tag body needs replacement, simply rotating the screw plate and removing the glass cover allows for easy removal of the tag body. These design features enhance the device's practicality.
[0021] 2. This RFID tag for underground pipeline inspection features a magnetic ring for easy attachment to metal pipes, and a fixing pad and adhesive layer for attachment to non-metallic pipes. These features improve the ease of fixing the RFID tag. Attached Figure Description
[0022] Figure 1 is a schematic diagram of the overall structure of this utility model;
[0023] Figure 2 is a schematic diagram of the internal structure of the glass protective shell of this utility model;
[0024] Figure 3 is a schematic diagram of the bottom structure of the glass protective shell of this utility model;
[0025] Figure 4 is an enlarged schematic diagram of point A in Figure 1 of this utility model.
[0026] In the diagram: 1. Glass protective shell; 2. Opening; 3. Boss; 4. Protective pad; 5. Glass cover; 6. Placement chamber; 7. Limiting plate; 8. RFID tag body; 9. Threaded cylinder; 10. Glass bolt; 11. Tightening plate; 12. Tightening groove; 13. Column; 15. Threaded groove; 16. Placement cylinder; 17. Annular opening; 18. Protective net; 19. Magnetic ring; 20. Fixing pad; 21. Fixing adhesive layer. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Please refer to Figures 1-4, which illustrate a technical solution provided by this utility model:
[0029] An RFID tag for underground pipeline inspection includes a glass protective shell 1, an opening 2 at the top of the glass protective shell 1, a boss 3 fixedly installed inside the glass protective shell 1, a protective pad 4 fixedly installed on the top of the boss 3, a glass cover plate 5 installed on the top of the opening 2, a placement chamber 6 inside the glass protective shell 1, a limiting plate 7 fixedly installed inside the placement chamber 6, an RFID tag body 8 between opposite sides of the limiting plate 7, the bottom of the glass cover plate 5 and the boss 3 fitting together, a threaded cylinder 9 fixedly installed on the top of the glass cover plate 5, and a glass bolt 10 threadedly connected to the top of the threaded cylinder 9.
[0030] In this embodiment, preferably, a rotating plate 11 is fixedly installed on the top of the glass bolt 10. The rotating plate 11 is rectangular and has rotating grooves 12 on both sides. A column 13 is fixedly installed inside the placement chamber 6. A threaded groove 15 is opened on the top of the column 13. The threaded groove 15 is threadedly connected to one end of the glass bolt 10. A placement cylinder 16 is fixedly installed inside the placement chamber 6. An annular opening 17 is opened on the outer surface of the placement cylinder 16. A protective net 18 is fixedly installed inside the annular opening 17. A magnetic ring 19 is fixedly installed at the bottom of the glass protective shell 1. A fixing pad 20 is fixedly installed at the bottom of the glass protective shell 1. The fixing pad 20 is located in the middle of the magnetic ring 19. A fixing adhesive layer 21 is fixedly installed on the top of the fixing pad 20.
[0031] With the above scheme, by setting the twisting groove 12, the twisting plate 11 can be rotated more conveniently; by setting the column 13, the threaded groove 15 can be opened on the top of the column 13; by setting the placement cylinder 16, the desiccant pack can be placed inside the placement cylinder 16; by setting the annular opening 17, the desiccant pack can absorb the moisture passing through the annular opening 17, keeping the inside of the device dry; by setting the magnetic ring 19, the device can be easily attached to the metal pipe; and by setting the fixing pad 20 and the fixing adhesive layer 21, the device can be attached to the non-metallic pipe.
[0032] In this embodiment, an RFID tag for underground pipeline inspection is used in a combination of a glass protective shell 1 and a glass cover plate 5. The RFID tag body 8 is encapsulated inside the glass protective shell 1. The glass protective shell 1 is made of a corrosion-resistant material, which protects the internal RFID tag body 8 from corrosion. At the same time, the placement cylinder 16 allows the desiccant inside to absorb moisture. Combined with the seal of the glass protective shell 1 and the glass cover plate 5, this provides a dry environment for the RFID tag body 8. When the RFID tag body 8 needs to be replaced in the future, it can be removed by simply turning the screw plate 11 and removing the glass cover plate 5. The above design improves the practicality of the device. The magnetic ring 19 makes it easy for the device to be attached to metal pipes. The fixing pad 20 and the fixing adhesive layer 21 make it easy for the device to be attached to non-metallic pipes. The above design improves the convenience of fixing the RFID tag body 8.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An RFID tag for underground pipeline inspection, comprising a glass protective shell (1), characterized in that: The glass protective shell (1) has an opening (2) at the top, a boss (3) is fixedly provided inside the glass protective shell (1), a protective pad (4) is fixedly provided on the top of the boss (3), a glass cover plate (5) is provided on the top of the opening (2), a placement chamber (6) is provided inside the glass protective shell (1), a limiting plate (7) is fixedly provided inside the placement chamber (6), an RFID tag body (8) is provided between the opposite sides of the limiting plate (7), the bottom of the glass cover plate (5) is in contact with the boss (3), a threaded cylinder (9) is fixedly provided on the top of the glass cover plate (5), and a glass bolt (10) is threadedly connected to the top of the threaded cylinder (9).
2. The RFID tag for underground pipeline inspection according to claim 1, characterized in that: A screwing plate (11) is fixedly installed on the top of the glass bolt (10). The screwing plate (11) is rectangular and has screwing grooves (12) on both sides.
3. The RFID tag for underground pipeline inspection according to claim 2, characterized in that: The placement chamber (6) is fixedly equipped with a column (13), and the top of the column (13) is provided with a threaded groove (15).
4. An RFID tag for underground pipeline inspection according to claim 3, characterized in that: The threaded groove (15) and the glass bolt (10) are threadedly connected at one end, and a placement cylinder (16) is fixedly installed inside the placement chamber (6).
5. An RFID tag for underground pipeline inspection according to claim 4, characterized in that: The outer surface of the placement tube (16) is provided with an annular opening (17), and a protective net (18) is fixedly installed inside the annular opening (17).
6. An RFID tag for underground pipeline inspection according to claim 1, characterized in that: A magnetic ring (19) is fixedly provided at the bottom of the glass protective shell (1), and a fixing pad (20) is fixedly provided at the bottom of the glass protective shell (1).
7. An RFID tag for underground pipeline inspection according to claim 6, characterized in that: The fixing pad (20) is located in the middle of the magnetic ring (19), and a fixing adhesive layer (21) is fixedly provided on the top of the fixing pad (20).