Corrosion-resistant pressure transmitter

Abstract

The utility model relates to the technical field of pressure transmitters, and discloses a corrosion-resistant pressure transmitter, which comprises a pressure transmitter main body, a display module is arranged on the surface of the pressure transmitter main body, the end part of the pressure transmitter main body is connected with a mounting flange through a connecting pipe column, the other side of the mounting flange is provided with a diaphragm, and the diaphragm is provided with a pressure sensor. A pressure sensor is arranged in the connecting pipe column, the diaphragm is connected with the pressure sensor through a silicone oil pipeline, a corrosion-resistant coating is arranged on the surface of the diaphragm and is made of PFA red powder paint, and crystals of the ruby paint are distributed disorderly after the ruby paint is mixed and dissolved. And the intricate intergranular form greatly slows down the permeation time of the mixed corrosive medium, thereby achieving the purpose of prolonging the service life of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure transmitters, in particular to a corrosion-resistant pressure transmitter. Background Art

[0002] The main function of the pressure transmitter is to transmit the pressure signal to the electronic equipment, and then display the pressure on the computer. The principle is roughly: convert the mechanical signal of water pressure into an electronic signal such as current (4-20mA). The pressure and voltage or current are linearly related, generally proportional. Therefore, the voltage or current output by the transmitter increases with the increase of pressure. From this, a relationship between pressure and voltage or current is obtained. The two pressures of the measured medium of the pressure transmitter are passed into the high and low pressure chambers. The pressure in the low pressure chamber adopts atmospheric pressure or vacuum, which acts on the isolation diaphragms on both sides of the delta element (i.e. the sensitive element), and is transmitted to both sides of the measuring diaphragm through the isolation plate and the filling liquid in the element. When the pressure transmitter is in use, the coated diaphragm will be in direct contact with the corrosive medium, which will make the conventional PFA material unable to resist the corrosion of hydrogen fluoride, fluorosilicic acid, and silicon tetrafluoride mixed medium for a long time. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art and proposes a corrosion-resistant pressure transmitter.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A corrosion-resistant pressure transmitter comprises a pressure transmitter body, a display module is arranged on the surface of the pressure transmitter body, an end of the pressure transmitter body is connected to a mounting flange via a connecting pipe column, a diaphragm is arranged on the other side of the mounting flange, a pressure sensor is arranged in the pressure transmitter body, the diaphragm is connected to the pressure sensor via a silicone oil pipeline, a corrosion-resistant coating is arranged on the surface of the diaphragm, and the material of the corrosion-resistant coating is PFA red powder coating.

[0006] As a preferred embodiment of the utility model, the pressure transmitter body includes a case and a connecting seat, a nameplate is provided on the top of the case, the case and the connecting pipe column are respectively installed on the top and the side of the connecting seat, and the pressure sensor is arranged at the bottom of the inside of the case.

[0007] As a preferred implementation manner of the present utility model, the display module is a display screen.

[0008] As a preferred embodiment of the present invention, the thickness of the corrosion-resistant coating is 0.15 to 0.3 mm.

[0009] As a preferred embodiment of the utility model, the connecting pipe column is connected to the connecting seat through a connecting mechanism, and the connecting mechanism includes a connecting piece, a bolt, a screw hole and a mounting hole. The connecting piece is T-shaped and is integrally formed with the connecting pipe column. The mounting hole is arranged on one side of the connecting piece, and the screw hole is arranged on one side of the connecting seat. The bolt passes through the mounting hole and is threadedly connected to the threaded hole.

[0010] As a preferred embodiment of the utility model, a display mainboard is arranged inside the watch case, the pressure sensor is electrically connected to the display mainboard using a pipeline, and the display mainboard is electrically connected to the display module through a wire.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model adopts PFA red powder coating as the corrosion-resistant coating. Compared with the prior art, the metallographic structure of the conventional PFA material will be changed after the mixed, heated and dissolved, so that its crystal arrangement is disordered. After the conventional PFA material is in contact with the above three mixed media for a long time, the medium will penetrate between the crystals to the diaphragm body material, thereby corroding the diaphragm. After the ruby ​​coating is mixed and dissolved, its crystals are disordered, and its intricate intercrystalline form greatly slows down the penetration time of the mixed corrosive medium, thereby achieving the purpose of increasing the service life of the product, and solving the problem in the prior art that the conventional PFA material cannot resist the corrosion of the mixed medium of hydrogen fluoride, fluorosilicic acid and silicon tetrafluoride for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an overall schematic diagram of a corrosion-resistant pressure transmitter proposed by the utility model.

[0014] In the figure: 1. Case; 2. Connecting pipe column; 3. Pressure sensor; 4. Display module; 5. Silicone oil pipeline; 6. Corrosion-resistant coating; 7. Mounting flange; 8. Diaphragm; 9. Connecting seat; 10. Bolt; 11. Nameplate; 12. Connector; 13. Display motherboard. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] Reference Figure 1A corrosion-resistant pressure transmitter comprises a pressure transmitter body, a display module 4 is arranged on the surface of the pressure transmitter body, an end of the pressure transmitter body is connected to a mounting flange 7 through a connecting pipe column 2, a diaphragm 8 is arranged on the other side of the mounting flange 7, a pressure sensor 3 is arranged in the pressure transmitter body, the diaphragm 8 is connected to the pressure sensor 3 through a silicone oil pipeline, a corrosion-resistant coating 6 is arranged on the surface of the diaphragm 8, and the material of the corrosion-resistant coating 6 is PFA red powder coating.

[0017] When the device is used, compared with the prior art, the metallographic structure of the conventional PFA material will be changed after the mixed, heated and dissolved, making its crystal arrangement disordered. After the conventional PFA material is in contact with the above three mixed media for a long time, the medium will penetrate between the crystals to the diaphragm body material, thereby corroding the diaphragm. After the ruby ​​coating is mixed and dissolved, its crystals are arranged disorderly, and its intricate intercrystalline form greatly slows down the penetration time of the mixed corrosive medium, thereby achieving the purpose of increasing the service life of the product, and solving the problem in the prior art that the conventional PFA material cannot resist the corrosion of the mixed medium of hydrogen fluoride, fluorosilicic acid and silicon tetrafluoride for a long time.

[0018]

[0019] In this embodiment, the pressure transmitter body includes a case 1 and a connecting seat 9, a nameplate 11 is provided on the top of the case 1, the case 1 and the connecting pipe column 2 are respectively installed on the top and the side of the connecting seat 9, and the pressure sensor 3 is arranged at the bottom of the case 1.

[0020] In this embodiment, the display module 4 is a display screen, and a display mainboard 13 is disposed inside the watch case 1. The pressure sensor 3 is electrically connected to the display mainboard 13 using a pipeline. The display mainboard 13 is electrically connected to the display module 4, and the pressure sensor 3 transmits the monitoring data to the display mainboard 13, and the display mainboard 13 displays the data on the display module 4.

[0021] In this embodiment, the thickness of the corrosion-resistant coating 6 is 0.15-0.3 mm. By setting the thickness of the coating to 0.15-0.3 mm, it can be adjusted between 0.15-0.3 mm. Corrosion-resistant coatings of different thicknesses can be set according to different use environments. In this way, the diaphragm can be protected more accurately (for example: when a pressure gauge with a range unit of MPa is in use, the normal accuracy is ±0.1%, when the thickness of the corrosion-resistant coating is 0.15 mm, the pressure accuracy is ±0.2%, when the thickness of the corrosion-resistant coating is 0.2 mm, the pressure accuracy is ±0.5%, and when the thickness of the corrosion-resistant coating is 0.3 mm, the pressure accuracy is ±1%). The corrosion-resistant coating of the above-mentioned device can be set to different coating thicknesses according to the actual use conditions of the device to achieve better results.

[0022] In this embodiment, the connecting pipe column 2 is connected to the connecting seat 9 through a connecting mechanism, and the connecting mechanism includes a connecting piece 12, a bolt 10, a screw hole and a mounting hole. The connecting piece 12 is T-shaped and is integrally formed with the connecting pipe column 2. The mounting hole is arranged on one side of the connecting piece 12, and the screw hole is arranged on one side of the connecting seat 9. The bolt 10 passes through the mounting hole and is threadedly connected to the threaded hole, so that the connecting pipe column 2 can be disassembled and installed by tightening the bolt, which makes installation and disassembly more convenient.

[0023] It should be noted that the components of the PFA red powder coating used in the present invention are shown in the above table.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A corrosion-resistant pressure transmitter, comprising a pressure transmitter body, a display module (4) being arranged on the surface of the pressure transmitter body, an end of the pressure transmitter body being connected to a mounting flange (7) via a connecting pipe column (2), a diaphragm (8) being arranged on the other side of the mounting flange (7), a pressure sensor (3) being arranged in the pressure transmitter body, the diaphragm (8) being connected to the pressure sensor (3) via a silicone oil pipeline, characterized in that: The surface of the diaphragm (8) is provided with a corrosion-resistant coating (6), and the material of the corrosion-resistant coating (6) is PFA red powder coating.

2. A corrosion-resistant pressure transmitter according to claim 1, characterized in that: The pressure transmitter body comprises a case (1) and a connecting seat (9); a nameplate (11) is arranged on the top of the case (1); the case (1) and the connecting pipe column (2) are respectively mounted on the top of the connecting seat (9) and the side of the connecting seat (9); and the pressure sensor (3) is arranged at the bottom inside the case (1).

3. The corrosion-resistant pressure transmitter according to claim 1, characterized in that: The display module (4) is a display screen.

4. A corrosion-resistant pressure transmitter according to claim 2, characterized in that: The thickness of the corrosion-resistant coating (6) is 0.15-0.3 mm.

5. The corrosion-resistant pressure transmitter according to claim 1, characterized in that: The connecting pipe column (2) is connected to the connecting seat (9) via a connecting mechanism, wherein the connecting mechanism comprises a connecting piece (12), a bolt (10), a screw hole and a mounting hole, wherein the connecting piece (12) is T-shaped and is integrally formed with the connecting pipe column (2), wherein the mounting hole is arranged on one side of the connecting piece (12), wherein the screw hole is arranged on one side of the connecting seat (9), and wherein the bolt (10) passes through the mounting hole and is threadedly connected to the screw hole.

6. The corrosion-resistant pressure transmitter according to claim 2, characterized in that: A display mainboard (13) is arranged inside the watch case (1), the pressure sensor (3) is electrically connected to the display mainboard (13) using a pipeline, and the display mainboard (13) is electrically connected to the display module (4).

Images