Double-flange liquid level meter with anti-scaling device

Abstract

The utility model provides a double-flange liquid level meter with an anti-scaling device. The double-flange liquid level meter comprises a flange assembly, an isolation diaphragm, a capillary tube and a differential pressure transmitter. Wherein the two flange assemblies are installed on protruding connecting pipes at the bottom and the top of the side wall of the storage tank respectively, each flange assembly is provided with an isolation diaphragm, and each isolation diaphragm is connected with the differential pressure transmitter through a capillary tube filled with a transmission medium; each flange assembly is provided with an anti-scaling device. According to the anti-scaling device, the transmission rod is installed on the flange, the stirring blade is connected to the transmission rod, and according to the characteristics of materials in the storage tank, the stirring blade slowly reciprocates in the connecting pipe through regular movement of the transmission rod, so that the materials in the connecting pipe are cyclically updated, and a blind area at the front end of the flange assembly is eliminated; scaling at the isolation diaphragm is reduced, the maintenance period of the flange is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of liquid level measurement technology, specifically relating to a double-flange liquid level gauge with an anti-scaling device. Background Technology

[0002] A dual-flange level gauge is a differential pressure level instrument used to measure liquid level or interface height. Widely used in industrial process control, it mainly consists of flange assemblies (high-pressure side flange and low-pressure side flange), diaphragm, capillary tube, and differential pressure transmitter. The high-pressure side flange is installed at the bottom of the container or at the lower limit of the liquid level, contacting the static pressure of the liquid; the low-pressure side flange is installed at the top of the container or at the upper limit of the liquid level, contacting the gas phase pressure (or reference pressure). The diaphragm, as an elastic element at the flange end, isolates the medium and senses both static and gas phase pressures. The capillary tube is filled with a transmission medium such as silicone oil. The static pressure and gas phase pressure generated by the liquid level act on the diaphragms of the high-pressure and low-pressure side flanges, respectively. The capillary tube transmits the pressure from the diaphragm to the differential pressure transmitter. The differential pressure transmitter receives the two pressure signals, calculates the pressure difference at both flanges, and outputs a 4-20mA signal proportional to the liquid level, thus achieving liquid level measurement.

[0003] In actual production, since most dual-flange level gauges have their flanges connected to a protruding connecting pipe on the side of the storage tank, a dead zone can easily form due to the stagnant medium inside the connecting pipe. Prolonged measurement can lead to scale buildup at the diaphragm. If the storage tank contains substances that easily crystallize or self-polymerize, crystals or self-polymers will form inside the connecting pipe, affecting measurement accuracy. In this case, the flange needs to be disassembled for cleaning and maintenance, increasing the workload for personnel. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This invention proposes a dual-flange level gauge with an anti-scaling device to solve the technical problems of how to eliminate the blind zone in front of the flange, reduce scaling at the isolation diaphragm, extend the flange maintenance cycle, and reduce maintenance costs.

[0006] (II) Technical Solution

[0007] To address the aforementioned technical problems, this utility model proposes a dual-flange level gauge with an anti-scaling device. The dual-flange level gauge includes flange assemblies, isolation diaphragms, capillary tubes, and differential pressure transmitters. The two flange assemblies are respectively installed on the bottom and top protruding connecting pipes of the side wall of the storage tank. Each flange assembly is equipped with an isolation diaphragm, and each isolation diaphragm is connected to the differential pressure transmitter via a capillary tube filled with a transmission medium. Each flange assembly is equipped with an anti-scaling device.

[0008] Furthermore, the anti-scaling device includes a drive rod and a stirring blade; wherein, a drive rod is installed on each flange assembly, the drive rod extends into the inner cavity of the connecting pipe, and the front end of the drive rod is connected to a stirring blade. The drive rod can move along the axial direction of the connecting pipe, thereby driving the stirring blade to move, thereby causing the material in the connecting pipe to generate a vortex, preventing the material from scaling at the isolation diaphragm.

[0009] Furthermore, a drive rod is installed at the top and bottom of each flange assembly.

[0010] Furthermore, the stirring blades are provided with crescent-shaped teeth.

[0011] Furthermore, the transmission rod is moved manually or electrically.

[0012] Furthermore, the anti-scaling device includes a transmission rod, a fixed head, a movable threaded rod, stirring blades, and toothed plates. Each flange assembly has a transmission rod mounted on its top, extending into the inner cavity of the connecting pipe, with a fixed head at the front end of each transmission rod. Each flange assembly has a movable threaded rod mounted on its bottom. The stirring blades are annular in shape, with grooved tracks on their sides, threads on the outer ring, and multiple toothed plates on the inner ring. The fixed head is embedded in the grooved tracks, and the stirring blades engage with the spiral grooves of the movable threaded rod through the threads of the outer ring. The transmission rod can move axially along the connecting pipe, achieving axial movement through the engagement of the stirring blades and the movable threaded rod. The fixed head and the grooved tracks further enable circumferential rotation of the stirring blades and their toothed plates, creating a vortex in the material within the connecting pipe and preventing scaling at the isolation diaphragm.

[0013] Furthermore, the fixing head adopts a circular fixing head.

[0014] Furthermore, crescent-shaped teeth are provided on the stirring blades.

[0015] Furthermore, the transmission rod is moved manually or electrically.

[0016] (III) Beneficial Effects

[0017] This invention proposes a dual-flange level gauge with an anti-scaling device, comprising flange assemblies, an isolation diaphragm, a capillary tube, and a differential pressure transmitter. The two flange assemblies are respectively installed on the bottom and top protruding connecting pipes of the side wall of the storage tank. Each flange assembly is equipped with an isolation diaphragm, and each isolation diaphragm is connected to the differential pressure transmitter via a capillary tube filled with a transmission medium. Each flange assembly is equipped with an anti-scaling device. The anti-scaling device uses a drive rod installed on the flange, with a stirring blade connected to the drive rod. Based on the characteristics of the material in the storage tank, the drive rod moves periodically, causing the stirring blade to slowly reciprocate within the connecting pipe. This circulates and refreshes the material within the connecting pipe, eliminating the blind zone at the front of the flange assembly, reducing scaling at the isolation diaphragm, extending the flange maintenance cycle, and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the double-flange level gauge in Embodiment 1 of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the double-flange level gauge in Embodiment 2 of this utility model;

[0020] Figure 3 This is a schematic diagram of the stirring blade and toothed plate structure in Embodiment 2 of this utility model. Detailed Implementation

[0021] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0022] Example 1

[0023] This embodiment proposes a dual-flange level gauge with an anti-scaling device, the overall structure of which is as follows: Figure 1 As shown, the system mainly includes flange assemblies 3 (high-pressure side flange and low-pressure side flange), isolation diaphragms 6, capillary tubes 7, and differential pressure transmitters 8. The two flange assemblies 3 are respectively installed on the connecting pipes 2 protruding from the bottom and top of the side wall of the storage tank 1. Each flange assembly 3 is equipped with an isolation diaphragm 6, and each isolation diaphragm 6 is connected to the differential pressure transmitter 8 via a capillary tube 7 filled with silicone oil. Each flange assembly 3 is equipped with an anti-scaling device.

[0024] The anti-scaling device includes a drive rod 4, a stirring blade 5, and toothed plates 9. Each flange assembly 3 has a drive rod 4 installed at both its top and bottom, extending into the inner cavity of the connecting pipe 2. Each drive rod 4 has a semi-circular stirring blade 5 connected to its front end, and the stirring blade 5 is equipped with multiple crescent-shaped toothed plates 9. The drive rod 4 can be moved manually or electrically along the axial direction of the connecting pipe 2 at regular intervals, thereby driving the stirring blade 5 and its toothed plates 9 to move. This creates a slight vortex in the material within the connecting pipe 2, facilitating material turnover and preventing scaling at the isolation diaphragm 6.

[0025] Example 2

[0026] This embodiment proposes a dual-flange level gauge with an anti-scaling device, the overall structure of which is as follows: Figure 2 As shown, the difference from Embodiment 1 is that the anti-scaling device includes a transmission rod 4, a circular fixed head 12, a movable threaded rod 10, a stirring blade 5, and toothed blades 9. A transmission rod 4 is mounted on the top of each flange assembly 3, extending into the inner cavity of the connecting pipe 2. A circular fixed head 12 is provided at the front end of each transmission rod 4. A movable threaded rod 10 is mounted on the bottom of each flange assembly 3. The stirring blade 5 has an annular structure, with grooved tracks 11 on the sides. The outer ring is threaded, and the inner ring has multiple crescent-shaped toothed blades 9, such as... Figure 3 As shown. The circular fixed head 12 is embedded in the grooved track 11, and the stirring blade 5 engages with the spiral groove of the movable threaded rod 10 through the outer thread. The transmission rod 4 can be moved axially along the connecting pipe 2 by manual or electric drive, thereby achieving axial movement through the engagement of the stirring blade 5 with the movable threaded rod 10, and achieving circumferential rotation of the stirring blade 5 and its upper toothed plate 9 through the cooperation of the circular fixed head 12 and the grooved track 11. This causes a slight vortex in the material inside the connecting pipe 2, which is beneficial for the renewal of the material inside the connecting pipe 2 and prevents scaling of the material at the isolation diaphragm 6.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A dual-flange level gauge with an anti-scaling device, the dual-flange level gauge comprising a flange assembly, an isolation diaphragm, a capillary tube, and a differential pressure transmitter; wherein, Two flange assemblies are respectively installed on the bottom and top protruding connecting pipes of the side wall of the storage tank. Each flange assembly is equipped with an isolation diaphragm, and each isolation diaphragm is connected to a differential pressure transmitter through a capillary tube filled with the transmission medium. The feature is that each flange assembly is equipped with an anti-scaling device.

2. The dual-flange level gauge with anti-scaling device as described in claim 1, characterized in that, The anti-scaling device includes a transmission rod and a stirring blade; wherein, a transmission rod is installed on each flange assembly, the transmission rod extends into the inner cavity of the connecting pipe, and the front end of the transmission rod is connected to the stirring blade. The transmission rod can move along the axial direction of the connecting pipe, thereby driving the stirring blade to move, so as to generate a vortex in the material inside the connecting pipe and prevent the material from scaling at the isolation diaphragm.

3. The dual-flange level gauge with anti-scaling device as described in claim 2, characterized in that, Each flange assembly has a drive rod installed at both the top and bottom.

4. The dual-flange level gauge with anti-scaling device as described in claim 2, characterized in that, The stirring blades are semi-circular.

5. The dual-flange level gauge with anti-scaling device as described in claim 2, characterized in that, The stirring blades are provided with crescent-shaped teeth.

6. The dual-flange level gauge with anti-scaling device as described in claim 2, characterized in that, The transmission rod is moved manually or electrically.

7. The dual-flange level gauge with anti-scaling device as described in claim 1, characterized in that, The anti-scaling device includes a transmission rod, a fixed head, a movable threaded rod, stirring blades, and toothed plates. Each flange assembly has a transmission rod mounted on its top, extending into the inner cavity of the connecting pipe. A fixed head is located at the front end of each transmission rod. A movable threaded rod is mounted on the bottom of each flange assembly. The stirring blades have an annular structure with grooved tracks on their sides. The outer ring is threaded, and the inner ring has multiple toothed plates. The fixed head is embedded in the grooved tracks, and the stirring blades engage with the spiral grooves of the movable threaded rod through the threads of the outer ring. The transmission rod can move axially along the connecting pipe, thereby achieving axial movement through the engagement of the stirring blades and the movable threaded rod. The fixed head, in conjunction with the grooved tracks, enables the circumferential rotation of the stirring blades and their toothed plates, thus creating a vortex in the material within the connecting pipe and preventing scaling at the isolation diaphragm.

8. The dual-flange level gauge with anti-scaling device as described in claim 7, characterized in that, The fixing head is a circular fixing head.

9. The dual-flange level gauge with anti-scaling device as described in claim 7, characterized in that, The stirring blades are provided with crescent-shaped teeth.

10. The dual-flange level gauge with anti-scaling device as described in claim 7, characterized in that, The transmission rod is moved manually or electrically.

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