An online sealing device for flow meters

Abstract

This utility model discloses an online sealing device for a flow meter, including a flange base and a flange sleeve installed on the bottom surface of the flange base. An upper pressure flange is connected to the surface of the flange base, and a lead screw is welded to the bottom surface of the upper pressure flange. A locking nut is fitted onto the surface of the lead screw. A flange sleeve is installed on the inner wall of the opening of the upper pressure flange. A limiting platform is provided on the inner wall of the flange sleeve, and a PTFE sealing ring assembly is installed on the surface of the limiting platform. The PTFE sealing ring assembly includes a flat gasket-type sealing ring and a conical sealing ring. This utility model achieves the conversion of axial pressure into radial sealing force through the linkage design of the flange assembly and the PTFE sealing ring assembly. After being compressed, the central conical sealing ring bidirectionally adheres to the flow meter and the flange sleeve, ensuring reliable sealing. The lead screw drives the upper pressure flange to move synchronously, making operation simple. This structure supports quick disassembly without damaging the seal, and is suitable for pipeline systems in chemical and energy industries that require frequent maintenance.

Description

Technical Field

[0001] This utility model relates to the field of industrial pipeline flow measurement technology, specifically to an online sealing device for a flow meter. Background Technology

[0002] A flow meter is an instrument used to measure the flow rate or volume / mass of fluids (liquids, gases, steam, etc.) in pipes or channels. It is widely used in industrial production, energy metering, environmental protection, water conservancy projects, and medical and health fields. Its core function is to convert fluid flow parameters (such as velocity and volume) into measurable signals (mechanical scale, electrical signals, digital displays, etc.) to achieve quantitative monitoring of fluid flow.

[0003] The existing technical solution still has the following problems when used:

[0004] 1. Traditional flow meters are often installed using flange welding or bolt fixing. Disassembly requires stopping the machine and damages the sealing structure, resulting in low maintenance efficiency and easy sealing failure.

[0005] 2. Existing rapid installation solutions often rely on complex sealing mechanisms, resulting in problems such as high cost and poor adaptability;

[0006] Therefore, improvements are needed to address the aforementioned issues. Utility Model Content

[0007] The purpose of this invention is to provide an online sealing device for flow meters to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an online sealing device for a flow meter, comprising a flange base and a flange sleeve installed on the bottom surface of the flange base, wherein an upper pressure flange is connected to the surface of the flange base, a lead screw is welded to the bottom surface of the upper pressure flange, and a locking nut is sleeved on the surface of the lead screw;

[0009] A flange sleeve is installed on the inner wall of the opening of the upper pressure flange. A limiting platform is provided on the inner wall of the flange sleeve. A PTFE sealing ring assembly is installed on the surface of the limiting platform. The PTFE sealing ring assembly includes a flat gasket-type sealing ring and a conical sealing ring.

[0010] Preferably, the upper pressure flange is threadedly connected to the lock nut after passing through an opening on the surface of the flange base via a lead screw.

[0011] Preferably, two flat gasket-type sealing rings are provided, and the two flat gasket-type sealing rings are distributed at the upper and lower ends of the PTFE sealing ring assembly.

[0012] Preferably, three conical sealing rings are provided, and the three conical sealing rings are distributed in the middle of the PTFE sealing ring assembly, and the surface of the conical sealing rings is inclined.

[0013] Preferably, the surface dimensions of the flange sleeve are adapted to the dimensions of the limiting platform on the inner wall of the flange sleeve.

[0014] Preferably, the upper pressure flange is in contact with the PTFE sealing ring assembly via the pressure flange sleeve.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This online sealing device for flowmeters uses a linkage design between the pressure flange assembly and the PTFE sealing ring assembly to convert axial pressure into radial sealing force. The central conical sealing ring, when compressed, fits bidirectionally against the flowmeter and flange sleeve, ensuring reliable sealing. The screw drives the upper pressure flange to move synchronously, making operation simple. This structure supports quick disassembly without damaging the seal, making it suitable for pipeline systems in chemical and energy industries that require frequent maintenance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the sealing device of this utility model;

[0018] Figure 2 This is an exploded view of the sealing device of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of the sealing device of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the upper pressure flange of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the flange sleeve of this utility model;

[0022] Figure 6 This is a schematic diagram of the PTFE sealing ring assembly of this utility model.

[0023] In the diagram: 1. Flange base; 2. Flange sleeve; 3. Upper pressure flange; 4. Lead screw; 5. Lock nut; 6. Pressure flange sleeve; 7. Limiting platform; 8. PTFE sealing ring assembly; 81. Flat gasket type sealing ring; 82. Conical sealing ring. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-6 This utility model provides a technical solution: an online sealing device for a flow meter, including a flange base 1 and a flange sleeve 2 installed on the bottom surface of the flange base 1. An upper pressure flange 3 is connected to the surface of the flange base 1, and a screw 4 is welded to the bottom surface of the upper pressure flange 3. A locking nut 5 is sleeved on the surface of the screw 4.

[0026] A flange sleeve 6 is installed on the inner wall of the opening of the upper pressure flange 3. A limiting platform 7 is provided on the inner wall of the flange sleeve 2. A PTFE sealing ring assembly 8 is installed on the surface of the limiting platform 7. The PTFE sealing ring assembly 8 includes a flat gasket type sealing ring 81 and a conical sealing ring 82.

[0027] The upper pressure flange 3 is threadedly connected to the lock nut 5 after passing through the opening on the surface of the flange base 1 via the lead screw 4.

[0028] Two flat gasket-type sealing rings 81 are provided, distributed at the upper and lower ends of the PTFE sealing ring assembly 8. Three conical sealing rings 82 are provided, distributed in the middle of the PTFE sealing ring assembly 8. The surface of the conical sealing rings 82 is inclined. The PTFE sealing ring assembly 8 is placed on the limiting platform 7 on the inner wall of the flange sleeve 2 in the order of upper flat gasket-type sealing ring 81, middle conical sealing ring 82, and lower flat gasket-type sealing ring 81, so that the axial pressure is converted into radial expansion force without damaging the seal.

[0029] The surface dimensions of the flange sleeve 6 are adapted to the dimensions of the inner wall limiting platform 7 of the flange sleeve 2. The upper flange 3 abuts against the PTFE sealing ring assembly 8 through the flange sleeve 6. In actual use, the flange sealing performance is ensured by contacting the flange sleeve 6 with the PTFE sealing ring assembly 8 on the surface of the limiting platform 7.

[0030] Working principle: When using the online sealing device for flowmeters, during installation, the flowmeter is inserted into the flange sleeve 2, and the screw 4 on the bottom surface of the upper pressure flange 3 passes through the opening on the surface of the flange base 1. Then, tightening the locking nut 5 drives the gap between the flange base 1 and the upper pressure flange 3 to decrease. The central conical sealing ring 82 expands bidirectionally towards the outer wall of the flowmeter and the inner wall of the flange sleeve 2 under axial pressure, forming a dynamic seal. When disassembling, loosening the locking nut 5 in the opposite direction allows the sealing ring to elastically reset, and the flowmeter can be quickly pulled out. The entire process does not require damage to the sealing structure, significantly reducing maintenance costs.

[0031] This is the characteristic of the online sealing device for flow meters. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An online sealing device for a flow meter, characterized in that, Includes a flange base (1) and a flange sleeve (2) installed on the bottom surface of the flange base (1). The surface of the flange base (1) is connected to an upper pressure flange (3). The bottom surface of the upper pressure flange (3) is welded with a screw (4). The surface of the screw (4) is fitted with a locking nut (5). The inner wall of the opening of the upper pressure flange (3) is equipped with a flange sleeve (6), and the inner wall of the flange sleeve (2) is provided with a limiting platform (7). The surface of the limiting platform (7) is equipped with a PTFE sealing ring assembly (8), which includes a flat gasket type sealing ring (81) and a conical sealing ring (82).

2. The online sealing device for a flow meter according to claim 1, characterized in that: The upper pressure flange (3) is threadedly connected to the locking nut (5) after passing through the opening on the surface of the flange base (1) via the lead screw (4).

3. The online sealing device for a flow meter according to claim 1, characterized in that: Two flat gasket-type sealing rings (81) are provided, and the two flat gasket-type sealing rings (81) are distributed at the upper and lower ends of the PTFE sealing ring assembly (8).

4. The online sealing device for a flow meter according to claim 1, characterized in that: Three conical sealing rings (82) are provided, and the three conical sealing rings (82) are distributed in the middle of the PTFE sealing ring assembly (8). The surface of the conical sealing rings (82) is inclined.

5. The online sealing device for a flow meter according to claim 1, characterized in that: The surface dimensions of the flange sleeve (6) are compatible with the dimensions of the inner wall limiting platform (7) of the flange sleeve (2).

6. The online sealing device for a flow meter according to claim 1, characterized in that: The upper pressure flange (3) comes into contact with the PTFE sealing ring assembly (8) through the pressure flange sleeve (6).

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