A water storage heat insulation device for protecting RFID tags

Abstract

The utility model discloses a kind of water storage heat insulation devices for protecting RFID label, belong to RFID technology high-temperature working condition application field.The device includes water storage shell, steam protection valve, dustproof directional cover, joint and joint bottom plate, label chamber is formed by joint and joint bottom plate, for accommodating RFID label, label chamber is joined in water storage shell inside, so that RFID label carries out heat exchange with cooling water by joint bottom plate.Steam protection valve is installed on water storage shell, for discharging internal steam control water temperature upper limit.Dustproof directional cover is made of magnetic steel material, middle part is provided with through-hole and sealed with glass plate, and misread is prevented by limiting the solid angle of RFID label receiving signal.The device solves the heat protection problem of RFID label under high-temperature environment and the signal interference problem under multi-recognizer environment, and is suitable for RFID label protection of high-temperature mobile equipment such as ladle.

Description

Technical Field

[0001] This utility model belongs to the field of RFID technology application technology under high temperature conditions, and specifically relates to a water storage and heat insulation device for protecting RFID tags. Background Technology

[0002] A Radio Frequency Identification (RFID) system consists of a reader, tags, and software. The reader reads and writes to electronic tags via radio frequency, enabling non-contact, two-way data communication over a range of several meters, thereby achieving the purpose of target identification and data exchange.

[0003] In high-temperature industrial environments such as steel mills, applying RFID technology to ladle identification requires fixing the reader in a specific location and attaching tags to the outer wall of each ladle. When a tagged ladle is detected entering or leaving the reader's signal range, the reader records the moment the ladle arrives or leaves that location. However, in practical applications under steel mill conditions, the following technical problems arise: (1) Temperature tolerance issue: Although the dedicated passive high-temperature tag can withstand temperatures of 200℃~250℃ under long-term working conditions, the highest temperature of the outer wall of the ladle reaches about 350℃~400℃ during the entire operation process. Even if the tag is installed 50mm away from the outer wall of the ladle, the temperature is usually around 150℃, but there is still a risk of excessive temperature under certain accidental factors, so thermal protection measures need to be provided to allow the ladle to move freely.

[0004] (2) Identification range control problem: The signal emitted by the identifier is not very directional, and the signals of multiple identifiers may overlap, which can easily lead to misreading or missed reading. When identifiers are installed in multiple locations in the same site, additional measures are needed to define and limit the identification range.

[0005] Existing cooling and protection devices typically employ circulating cooling systems, but these systems suffer from drawbacks such as complex cooling medium circulation and inability to be moved over long distances, making it difficult to meet the usage requirements of mobile equipment such as steel ladles. Summary of the Invention

[0006] Purpose of the invention: The purpose of this utility model is to address the shortcomings of the existing technology by providing a water storage and heat insulation device for protecting RFID tags, thereby solving the problems of thermal protection of RFID tags in high-temperature environments and signal interference in multi-identifier environments.

[0007] Technical solution: The water storage and heat insulation device for protecting RFID tags described in this utility model includes: Water storage shell, used to store cooling water; A tag chamber configured to accommodate an RFID tag, the tag chamber being formed by a connector and a connector base plate connected to one end of the connector, the connector base plate being used to mount the RFID tag; the tag chamber is engaged with the water storage shell such that the connector base plate can exchange heat with the cooling water inside the water storage shell, and the other end of the connector extends to the outside of the water storage shell; A steam protection valve, which is installed on the water storage shell, is used to discharge internal steam to control the upper limit of water temperature; A dustproof directional cover is detachably mounted on one end of the connector that extends to the outside of the water storage shell.

[0008] Preferably, the dustproof directional cover is made of magnetic steel with radio frequency shielding properties, while the water storage shell, connector, and connector base plate are made of non-magnetic steel.

[0009] Preferably, the end of the connector extending to the outside of the water storage shell is provided with an external thread, and the dustproof directional cover is provided with a matching internal thread, and the two are detachable and installable by means of thread engagement.

[0010] Preferably, the connector base plate is provided with one or more threaded blind holes for attaching and fixing the RFID tag thereon with screws.

[0011] Preferably, the opening pressure of the steam protection valve is adjustable to set the upper limit of the temperature of the cooling water inside the water storage shell to a predetermined value, such as between 120°C and 180°C.

[0012] Preferably, the dustproof directional cover has a round hole in the middle and is sealed from the inside by a circular plate.

[0013] Preferably, the circular plate is made of glass or other non-magnetic non-metallic materials.

[0014] Preferably, the depth of the tag chamber and the diameter of the circular hole together define the solid angle at which the RFID tag can receive radio frequency signals.

[0015] Preferably, the water storage shell (1) has a cuboid structure.

[0016] Preferably, the depth of the tag chamber is 50 mm and the diameter of the circular hole is 70 mm, so that the solid angle at which the RFID tag can receive radio frequency signals is 70°.

[0017] Beneficial effects: Compared with the prior art, the advantages of this utility model are: it provides thermal protection measures that can be moved freely with mobile devices, overcoming the problems of complex cooling medium circulation systems and inability to move long distances in traditional coolers; through the combination of water storage insulation and steam protection valve, it effectively limits the temperature of RFID tags to below a safe value; it uses materials with different magnetic permeability to limit the identification range, which is beneficial to the accuracy of tag reading in scenarios where multiple readers work simultaneously; it has a simple structure, is easy to maintain, and is applicable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the water storage and heat insulation device for protecting RFID tags provided in Example 1.

[0019] Figure 2 This is a schematic diagram of the usage posture of the water storage and heat insulation device for protecting RFID tags provided in Example 1.

[0020] Figure 3 This is a cross-sectional view of the water storage and heat insulation device for protecting RFID tags provided in Example 1.

[0021] Figure 4 This is a structural diagram of a dustproof directional cover. Figure 4 (a) is a top view of the dustproof directional cover. Figure 4 (b) along Figure 4 (a) Sectional view along AA. Detailed Implementation

[0022] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited to the described embodiments.

[0023] Example 1: As Figures 1 to 3 The water storage and heat insulation device shown is for protecting RFID tags and includes a water storage shell 1, a steam protection valve 2, a dustproof directional cover 3, a connector 4, and a connector base plate 5.

[0024] The water storage shell 1 has a cuboid structure with square front and back sides. It stores cooling water but is not fully filled to prevent it from affecting the venting. The water storage shell 1 is made of non-magnetic steel to avoid interfering with RFID signals.

[0025] Steam protection valve 2 is welded and installed on the upper surface of water storage shell 1. The opening pressure of steam protection valve 2 is adjustable, and the upper limit of the water temperature inside the water storage shell can be controlled by setting an appropriate opening pressure. In a specific embodiment, the opening pressure can be adjusted to 10MPa, corresponding to a water temperature of 180℃. When the internal water temperature reaches this temperature, steam is released, thereby limiting the upper limit of the water temperature to around 180℃.

[0026] The connector 4 is a single-threaded stainless steel pipe made of non-magnetic steel. The threadless end of the connector 4 is welded and sealed to the connector base plate 5, forming a cylindrical cavity with one open end, called the label chamber. The label chamber is welded to the front of the water storage shell 1, so that the threaded part of the connector 4 is exposed on the outside of the water storage shell 1, while the rest of the label chamber and the connector base plate 5 are located inside the water storage shell 1.

[0027] The connector base plate 5 is also made of non-magnetic steel and has one or more threaded blind holes for attaching and fixing the RFID tag to the connector base plate 5 with screws. Since one side of the connector base plate 5 is in contact with the cooling water inside the water storage shell 1 and the other side is in contact with the RFID tag, the RFID tag can be kept at an ambient temperature close to the water temperature, thus achieving effective thermal protection.

[0028] like Figure 4 As shown, the dustproof directional cover 3 is made of magnetic steel and has high magnetic permeability, which shields electromagnetic signals transmitted from the side and the front side. The dustproof directional cover 3 has an internal thread that matches the external thread of the connector 4, and can be screwed onto the connector 4 by thread engagement, achieving detachable installation.

[0029] A circular through-hole is provided in the center of the dustproof directional cover 3, which is sealed from the inside by a circular glass plate. The circular glass plate is made of glass or other non-magnetic non-metallic material to seal the circular hole. It is transparent to radio frequency signals and will not affect the transmission of RFID signals, while also serving as a dustproof seal.

[0030] Through the magnetic steel shielding of the dustproof directional cover 3 and the limitation of the central through-hole, the RFID tag can only receive signals through the central circular hole. All lines connecting the center point of the RFID tag to points on the edge of the circular hole determine the solid angle for receiving the signal, ensuring that it can only respond to the reader within a small forward angle.

[0031] Example 2: In this example, the label chamber depth can be set to 50mm, and the diameter of the central hole in the dustproof directional cover 3 can be set to 70mm. Calculations show that the angular range of the signal that the label can receive on the horizontal plane is: That is, RFID readers within a 70° radius directly in front of the device can recognize this RFID tag.

[0032] In use, the device is mounted on the steel ladle using the bracket, maintaining a 50mm distance from the outer wall of the ladle. For scenarios requiring multiple identifiers to operate simultaneously, the size of the central hole in the dustproof directional cover can be adjusted to accommodate different identifier spacing requirements, effectively preventing misreading caused by signal overlap.

[0033] Compared to traditional circulating cooling systems, this device uses water storage and insulation, eliminating the need for a complex cooling medium circulation system. It can move freely with mobile equipment such as steel ladles, making it suitable for long-distance operation. Heat exchange between the cooling water inside the water storage shell and the RFID tags is controlled by an adjustable pressure steam protection valve. This maintains the RFID tag temperature below a safe level, extending their lifespan. Utilizing the radio frequency shielding properties of magnetic steel and the geometric definition of the through-holes, the device precisely controls the RFID tag's signal reception range, effectively solving signal interference problems in multi-identifier environments and improving reading accuracy. The overall structure is simple, with reliable component connections, making it easy to manufacture and maintain at a relatively low cost. By adjusting the size of the through-holes in the dustproof directional cover, it can adapt to different identifier placement schemes and recognition range requirements, demonstrating good adaptability. Simultaneously, it provides thermal protection, dustproofing, and directional identification functions, comprehensively protecting the RFID tags for normal operation in harsh industrial environments.

[0034] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A water storage and heat insulation device for protecting RFID tags, characterized in that, include: Water storage shell (1) is used to store cooling water; The tag chamber is configured to accommodate RFID tags. The tag chamber is formed by a connector (4) and a connector base plate (5) connected to one end of the connector (4). The connector base plate (5) is used to install the RFID tags. The tag chamber is engaged with the water storage shell (1) so that the connector base plate (5) can exchange heat with the cooling water inside the water storage shell (1), and the other end of the connector (4) extends to the outside of the water storage shell (1). A steam protection valve (2) is installed on the water storage shell (1) to discharge internal steam in order to control the upper limit of water temperature; A dustproof directional cover (3) is detachably mounted on one end of the connector (4) extending to the outside of the water storage shell (1).

2. The water storage and heat insulation device for protecting RFID tags according to claim 1, characterized in that, The dustproof directional cover (3) is made of magnetic steel with radio frequency shielding properties, while the water storage shell (1), connector (4) and connector base plate (5) are made of non-magnetic steel.

3. The water storage and heat insulation device for protecting RFID tags according to claim 1, characterized in that, The connector (4) has an external thread extending to the outside of the water storage shell (1), and the dustproof directional cover (3) has a matching internal thread. The two are detachable and installable by thread engagement.

4. The water storage and heat insulation device for protecting RFID tags according to claim 1, characterized in that, The connector base plate (5) is provided with one or more threaded blind holes (12) for attaching and fixing the RFID tag thereon by screws.

5. The water storage and heat insulation device for protecting RFID tags according to claim 1, characterized in that, The opening pressure of the steam protection valve (2) can be adjusted to set the upper limit of the temperature of the cooling water inside the water storage shell (1) to a predetermined value.

6. The water storage and heat insulation device for protecting RFID tags according to claim 1 or 2, characterized in that, The dustproof directional cover (3) has a round hole in the middle and is sealed from the inside by a circular plate.

7. The water storage and heat insulation device for protecting RFID tags according to claim 6, characterized in that, The circular plate is made of glass or other non-magnetic non-metallic materials.

8. The water storage and heat insulation device for protecting RFID tags according to claim 7, characterized in that, The depth of the tag chamber and the diameter of the circular hole together define the solid angle at which the RFID tag can receive radio frequency signals.

9. The water storage and heat insulation device for protecting RFID tags according to claim 1, characterized in that, The water storage shell (1) has a cuboid structure.

10. The water storage and heat insulation device for protecting RFID tags according to claim 8, characterized in that, The tag chamber has a depth of 50mm and the circular hole has a diameter of 70mm, which together define the solid angle at which the RFID tag can receive radio frequency signals as 70°.

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