Liquid level monitoring device based on diaphragm type FBG pressure sensor

Abstract

The utility model discloses a liquid level monitoring device based on a diaphragm type FBG pressure sensor, which comprises a mounting block arranged in a storage tank and a plurality of monitoring assemblies, the mounting block is provided with a plurality of movable grooves, a rotating chamber is arranged in the mounting block, a screw extending into the rotating chamber is rotatably arranged in each movable groove, and the monitoring assemblies are arranged on the mounting block. A driving motor is arranged on the mounting block, and an output shaft of the driving motor also extends into the rotating chamber and is connected with the screw rod through a rotating mechanism. The screw rod is driven to rotate through the driving motor, so that the positioning disc on the movable frame synchronously expands or contracts and is accurately attached to the inner wall of the storage tank, the problem that a traditional fixed arc-shaped plate is poor in adaptability is solved, and the device is suitable for storage tanks with different inner diameters and structures.

Description

Technical Field

[0001] This utility model relates to the field of liquid level monitoring technology, and in particular to a liquid level monitoring device based on a diaphragm-type FBG pressure sensor. Background Technology

[0002] The liquid level monitoring device based on the diaphragm-type FBG pressure sensor is a high-precision liquid level measurement system that uses fiber Bragg grating (FBG) technology. Its structure consists of a dust cover, a pressure-sensing diaphragm, a sealing ring, and a stainless steel base.

[0003] In existing technologies, liquid level monitoring devices based on diaphragm-type FBG pressure sensors often employ an arc-shaped plate design for the crucial support component. During operation, this arc-shaped plate supports the entire device through contact with the inner wall of the storage tank. However, this seemingly simple support structure has significant drawbacks. The curvature of the arc-shaped plate is fixed during manufacturing, severely limiting its adaptability. Storage tanks come in various sizes, with differences in inner diameter and internal structure between different manufacturers and for different applications. An arc-shaped plate with a fixed curvature may not fit tightly against the inner wall, leading to unstable support. Under the impact of liquid flow, the liquid level monitoring device is prone to shaking, affecting the accuracy of the monitoring data. Conversely, when dealing with storage tanks with larger inner diameters, the arc-shaped plate, due to insufficient curvature, cannot form an effective support contact area with the inner wall, potentially causing the device to be unstable during installation or even risk falling. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a liquid level monitoring device based on a diaphragm-type FBG pressure sensor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A liquid level monitoring device based on a diaphragm-type FBG pressure sensor includes a mounting block and multiple monitoring components disposed within a storage tank. The mounting block has multiple movable slots and a rotating chamber inside. Each movable slot has a screw extending into the rotating chamber. The mounting block has a drive motor, the output shaft of which also extends into the rotating chamber and is connected to the screw via a rotating mechanism. A movable frame is threaded onto the screw, a positioning plate is mounted on the movable frame, and a vertical rod is also mounted on the movable frame. The monitoring components are mounted on the vertical rod via the mounting mechanism.

[0007] Preferably, the rotating mechanism includes a drive gear mounted on the output shaft of the drive motor, and a transmission gear meshing with the drive gear is mounted on the screw.

[0008] Preferably, the mounting mechanism includes mounting bolts mounted on the monitoring component, and the vertical rod is provided with mounting grooves corresponding to the mounting bolts.

[0009] Preferably, the positioning disk is provided with a rubber sleeve, and the surface of the rubber sleeve is provided with anti-slip texture.

[0010] Preferably, the mounting block has a support frame at its bottom, and the support frame has an inverted T-shaped design.

[0011] Preferably, both the driving gear and the transmission gear are bevel gears, and the specific meshing relationship between the driving gear and the transmission gear is perpendicular meshing.

[0012] The beneficial effects of this utility model are:

[0013] 1. The screw is driven by a drive motor to rotate, which causes the positioning plate on the movable frame to expand or contract synchronously, precisely fitting the inner wall of the storage tank. This solves the problem of poor adaptability of traditional fixed arc plates and is suitable for storage tanks with different inner diameters and structures.

[0014] 2. Vertical meshing transmission mechanism: The drive motor meshes vertically with the transmission gear through the active gear (bevel gear), which efficiently transmits power to multiple screws, enabling multiple positioning discs to move synchronously. The adjustment process is fast and highly consistent.

[0015] 3. The monitoring components are fixed to the mounting slots of the vertical poles by mounting bolts. The number, spacing and height can be freely adjusted according to the needs, supporting distributed or quasi-distributed monitoring.

[0016] 4. The U-shaped limiting structure of the screw and the movable groove prevents the movable frame from rotating, ensuring the positioning plate moves linearly and saving internal space of the storage tank. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a liquid level monitoring device based on a diaphragm-type FBG pressure sensor proposed in this utility model.

[0018] Figure 2 A bottom view of the structure for mounting blocks and other components;

[0019] Figure 3 for Figure 1 A schematic diagram of the vertical section structure;

[0020] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A;

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point B.

[0022] In the diagram: 1. Storage tank, 2. Mounting block, 3. Drive motor, 4. Movable slot, 5. Movable frame, 6. Positioning plate, 7. Rubber sleeve, 8. Vertical rod, 9. Monitoring component, 10. Support frame, 11. Mounting bolt, 12. Mounting slot, 13. Screw, 14. Rotating chamber, 15. Drive gear, 16. Transmission gear. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 This liquid level monitoring device is mainly used for accurate liquid level monitoring in storage tank 1. Its core structure includes an installation block 2 installed inside storage tank 1 and multiple monitoring components 9.

[0025] The monitoring component 9 is an existing technology product, and its structure, from top to bottom, consists of a dust cover, a pressure-sensing diaphragm, a sealing ring, and a stainless steel base. Two pressure-sensitive fiber optic cables (FBGs) are fixed to the pressure-sensing diaphragm using high-temperature adhesive; one is for pressure sensing, and the other for temperature compensation. After the sealing ring is placed on the pressure-sensing base, the pressure-sensing diaphragm is placed on the pressure-sensing base, with the fiber optic cable portion of the pressure-sensing diaphragm extending from one side of the base. Finally, the dust cover is fixed to the entire base with screws.

[0026] Mounting block 2 plays a crucial supporting and connecting role in the entire device. It is equipped with multiple movable slots 4, which provide rotation space for the subsequent screw 13. At the same time, mounting block 2 contains a rotating chamber 14, which is the key area for power transmission and conversion in the entire device.

[0027] As shown in the figure, both the movable slot 4 and the movable frame 5 are U-shaped. They work together to ensure that the movable frame 5 has its own limit and will not rotate with the screw 13.

[0028] Each movable slot 4 houses a rotatable screw 13, with one end of the screw 13 extending into the rotating chamber 14. A drive motor 3 is mounted on the mounting block 2, and the output shaft of the drive motor 3 also extends into the rotating chamber 14, connecting to the screw 13 via a specific rotating mechanism. This rotating mechanism specifically includes a drive gear 15 mounted on the output shaft of the drive motor 3, and a transmission gear 16 mounted on the screw 13 and meshing with the drive gear 15. Notably, both the drive gear 15 and the transmission gear 16 are bevel gears, and their meshing relationship is perpendicular. This design enables efficient power transmission and steering, allowing the rotation of the drive motor 3 to smoothly drive the screw 13 to rotate.

[0029] It should be noted that the thread orientation of the four screws 13 is set according to their rotation direction to ensure that the four movable frames 5 move synchronously closer or further apart.

[0030] When the screw 13 rotates, due to its threaded structure, the movable frame 5, which is threaded onto the screw 13, moves along the axial direction of the screw 13. A positioning disc 6 is mounted on the movable frame 5, and a rubber sleeve 7 is fitted onto the positioning disc 6. The surface of the rubber sleeve 7 is also provided with anti-slip texture. The design of the positioning disc 6 and the rubber sleeve 7 is mainly to provide stable support and positioning when the monitoring component 9 is working, while the anti-slip texture further enhances friction and prevents displacement of the monitoring component 9 during operation.

[0031] The movable frame 5 is also equipped with a vertical rod 8, which is used to install the monitoring component 9. The monitoring component 9 is mounted on the vertical rod 8 via a mounting mechanism, which includes mounting bolts 11 installed on the monitoring component 9 and mounting slots 12 on the vertical rod 8 corresponding to the mounting bolts 11 (specifically, the mounting bolts 11 and mounting slots 12 are threaded together, and the mounting bolts 11 are glued or welded to the base of the monitoring component 9). This installation method is simple and convenient, allowing staff to easily install and remove the monitoring component 9 for later maintenance and replacement.

[0032] In addition, a support frame 10 is provided at the bottom of the mounting block 2, and the support frame 10 has an inverted T-shaped design. The inverted T-shaped support frame 10 can provide more stable support for the mounting block 2, so that it can be installed firmly in the storage tank 1 and is not affected by factors such as the flow of liquid in the storage tank 1.

[0033] Components not specifically described in this utility model are all standard parts and can be purchased from the market. The specific connection methods of each component adopt mature methods in the prior art, and will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] In use, the mounting block 2 and other components are placed on the storage tank 1. The number and vertical spacing of the monitoring components 9 on the vertical rod 8 can be selected according to the actual situation. After the mounting block 2 and other components are in the storage tank 1, the drive motor 3 can be started. The drive motor 3, together with the active gear 15 and the transmission gear 16, can drive the screw 13 to rotate. When the screw 13 rotates, the movable frame 5 drives the positioning disk 6 to move. As shown in the figure, the four positioning disks 6 move away and spread out, and finally contact the inner wall of the storage tank 1 and squeeze. The mounting block 2 is supported by the support frame 10 below. Thus, the mounting block 2 and other components will be stably placed in the storage tank 1, and the monitoring components 9 shown in the figure can perform monitoring.

[0035] 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 equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A liquid level monitoring device based on a diaphragm FBG pressure sensor, comprising a mounting block (2) arranged in a storage tank (1) and a plurality of monitoring assemblies (9), characterized in that, The mounting block (2) is provided with multiple movable slots (4), and the mounting block (2) is provided with a rotating chamber (14). Each movable slot (4) is provided with a screw (13) extending into the rotating chamber (14). The mounting block (2) is provided with a drive motor (3). The output shaft of the drive motor (3) also extends into the rotating chamber (14) and is connected to the screw (13) through a rotating mechanism. A movable frame (5) is threaded on the screw (13). A positioning plate (6) is installed on the movable frame (5). A vertical rod (8) is also installed on the movable frame (5). The monitoring component (9) is mounted on the vertical rod (8) through the mounting mechanism.

2. The liquid level monitoring device based on the diaphragm FBG pressure sensor according to claim 1, characterized in that, The rotating mechanism includes a drive gear (15) mounted on the output shaft of the drive motor (3), and a transmission gear (16) meshing with the drive gear (15) is mounted on the screw (13).

3. The liquid level monitoring device based on the diaphragm FBG pressure sensor according to claim 2, characterized in that, The installation mechanism includes mounting bolts (11) installed on the monitoring component (9), and the vertical rod (8) is provided with mounting grooves (12) corresponding to the mounting bolts (11).

4. The liquid level monitoring device based on the diaphragm FBG pressure sensor according to claim 3, characterized in that, The positioning disk (6) is provided with a rubber sleeve (7), and the surface of the rubber sleeve (7) is provided with anti-slip texture.

5. The liquid level monitoring device based on the diaphragm FBG pressure sensor according to claim 4, characterized in that, The mounting block (2) is provided with a support frame (10) at the bottom, and the support frame (10) is designed in an inverted T shape.

6. The liquid level monitoring device based on the diaphragm FBG pressure sensor according to claim 5, characterized in that, Both the driving gear (15) and the transmission gear (16) are bevel gears, and the specific meshing relationship between the driving gear (15) and the transmission gear (16) is perpendicular meshing.

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