An anti-interference electromagnetic flowmeter protective sealing device

Abstract

This utility model relates to the technical field of protective structures for measuring instruments, specifically disclosing an anti-interference electromagnetic flowmeter protective sealing device, including a housing and a flowmeter body disposed inside the housing. A sealing component and an anti-interference component are disposed between the housing and the flowmeter body. The sealing component includes a main sealing ring and a secondary sealing ring. The main sealing ring is disposed at the connection between the housing and the flowmeter body, and the secondary sealing ring is disposed outside the main sealing ring. Both the main sealing ring and the secondary sealing ring are tightly fitted to the housing and the flowmeter body. The anti-interference component includes an electromagnetic shielding layer and a grounding wire. This anti-interference electromagnetic flowmeter protective sealing device, through the sealing component, anti-interference component, buffer layer, flow guide groove, and reasonable installation design, achieves high anti-interference performance, reliable sealing performance, and good applicability, effectively extending service life and reducing equipment replacement and maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of protective structure technology for measuring instruments, and specifically discloses a protective sealing device for an anti-interference electromagnetic flowmeter. Background Technology

[0002] Electromagnetic flowmeters, as flow measurement devices based on the Faraday principle of electromagnetic induction, play a vital role in numerous fields such as industrial production, energy, environmental monitoring, agriculture, municipal engineering, and medicine. They offer advantages such as high measurement accuracy, good stability, strong corrosion resistance, no moving parts, and wide applicability to various conductive liquids. For example, they are used in the chemical industry to measure corrosive media, in the food and beverage industry to measure liquid food, and in the pharmaceutical industry to accurately measure the flow rate of pharmaceutical solutions. However, electromagnetic flowmeters face several challenges in practical applications. Firstly, electromagnetic interference from the external environment can severely impact their measurement accuracy. Because the induced potential in the liquid is very small, a high-magnification amplifier is required, making the flowmeter highly susceptible to external electromagnetic interference. Even weak interference signals, after being amplified, can significantly affect the instrument's accuracy, posing a threat to the stability and reliability of the control system. Secondly, existing sealing structures are insufficient in preventing liquid leakage and protecting the internal electromagnetic components and circuit boards from external environmental influences. For example, the common method of sealing the pipe and flowmeter with flanges and bolts can cause the connection to loosen due to vibrations from liquid flow. If not checked promptly, leaks can occur, affecting production.

[0003] Therefore, developing a protective sealing device for electromagnetic flowmeters with good anti-interference performance and a reliable sealing structure is of great practical significance. Utility Model Content

[0004] This utility model proposes an anti-interference electromagnetic flowmeter protective sealing device, which has a double sealing structure and a multi-layer anti-interference structure, which can effectively improve the sealing performance and anti-interference ability of the device, while facilitating installation and maintenance.

[0005] This utility model is implemented as follows: an anti-interference electromagnetic flowmeter protective sealing device includes a housing and a flowmeter body disposed inside the housing. A sealing component and an anti-interference component are disposed between the housing and the flowmeter body. The sealing component includes a main sealing ring and a secondary sealing ring. The main sealing ring is disposed at the connection between the housing and the flowmeter body, and the secondary sealing ring is disposed outside the main sealing ring. Both the main sealing ring and the secondary sealing ring are tightly fitted to the housing and the flowmeter body. The anti-interference component includes an electromagnetic shielding layer and a grounding wire. The electromagnetic shielding layer is wrapped around the outside of the flowmeter body. One end of the grounding wire is connected to the electromagnetic shielding layer, and the other end is connected to a grounding device outside the housing.

[0006] As a preferred embodiment of the anti-interference electromagnetic flowmeter protective sealing device of this utility model, an annular sealing groove is provided on the inner side wall of the housing, the main sealing ring is embedded in the sealing groove, the secondary sealing ring is provided on the outer side of the sealing groove, and the secondary sealing ring forms a sealing fit with both the inner side wall of the housing and the outer side wall of the flowmeter body.

[0007] As a preferred embodiment of the anti-interference electromagnetic flowmeter protective sealing device of this utility model, the main sealing ring is made of silicone rubber material, and the secondary sealing ring is made of polytetrafluoroethylene material.

[0008] As a preferred embodiment of the anti-interference electromagnetic flowmeter protective sealing device of this utility model, the electromagnetic shielding layer includes an inner metal braided mesh and an outer conductive coating. The metal braided mesh is tightly wrapped around the outside of the flowmeter body, and the conductive coating is applied to the outside of the metal braided mesh.

[0009] As a preferred embodiment of the anti-interference electromagnetic flowmeter protective sealing device of this utility model, the top and bottom of the housing are provided with mounting flanges, the mounting flanges are provided with multiple mounting holes, the mounting holes are provided with insulating bolts, the heads of the insulating bolts are provided with insulating gaskets, and the insulating gaskets are located between the mounting flanges and the bolt heads.

[0010] As a preferred embodiment of the anti-interference electromagnetic flowmeter protective sealing device of this utility model, a buffer layer is further provided between the inner wall of the outer shell and the flowmeter body, and the buffer layer is made of elastic material.

[0011] As a preferred embodiment of the anti-interference electromagnetic flowmeter protective sealing device of this utility model, a flow guide groove is provided on the outer side wall of the housing, and the flow guide groove is distributed along the circumference of the housing.

[0012] The beneficial effects of this utility model are: 1. The anti-interference component, consisting of an electromagnetic shielding layer and a grounding wire, effectively shields external electromagnetic interference and introduces the interference current to the ground, ensuring that the electromagnetic flowmeter can still accurately measure the flow rate in complex electromagnetic environments. This greatly improves the measurement accuracy and stability, meeting the needs of industrial production and scientific research fields with high requirements for measurement accuracy.

[0013] 2. The sealing assembly consisting of the main sealing ring and the secondary sealing ring, along with the sealing groove and other structures, can effectively prevent liquid leakage, prevent external liquid from entering and affecting the normal operation of the electromagnetic flowmeter, and at the same time avoid the internal electromagnetic components and circuit boards from being corroded by the external environment, thus extending the service life of the electromagnetic flowmeter and improving the reliability and stability of the device in the liquid environment.

[0014] 3. The mounting flange of the device facilitates installation on various pipelines and other equipment. The insulating bolts and insulating gaskets ensure electrical insulation performance during installation. The buffer layer can buffer external vibrations and protect the flow meter body. The guide channel can guide the liquid to flow evenly and reduce local impacts, enabling the device to adapt to different working environments and operating conditions, and has wide applicability.

[0015] 4. The excellent sealing performance of the sealing components prevents external liquids from corroding internal components, the anti-interference components ensure that the equipment operates in a normal electromagnetic environment, the buffer layer reduces vibration damage, and the flow guide groove reduces liquid impact. All of these effectively extend the overall service life of the electromagnetic flowmeter's protective sealing device and reduce equipment replacement and maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the mounting flange and mounting hole of this utility model.

[0019] Figure 3 This is a schematic diagram of the outer shell and the guide channel of this utility model.

[0020] In the diagram, 1 is the outer casing; 2 is the flow meter body; 3 is the main sealing ring; 4 is the secondary sealing ring; 5 is the electromagnetic shielding layer; 6 is the grounding wire; 7 is the sealing groove; 8 is the mounting flange; 9 is the mounting hole; 10 is the insulating bolt; 11 is the insulating gasket; 12 is the buffer layer; and 13 is the flow guide groove. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0022] Please see Figure 1-3 An anti-interference electromagnetic flowmeter protective sealing device includes a housing 1 and a flowmeter body 2 disposed inside the housing 1. A sealing component and an anti-interference component are disposed between the housing 1 and the flowmeter body 2. The sealing component includes a main sealing ring 3 and a secondary sealing ring 4. The main sealing ring 3 is disposed at the connection between the housing 1 and the flowmeter body 2, and the secondary sealing ring 4 is disposed outside the main sealing ring 3. Both the main sealing ring 3 and the secondary sealing ring 4 are tightly fitted to the housing 1 and the flowmeter body 2. The anti-interference component includes an electromagnetic shielding layer 5 and a grounding wire 6. The electromagnetic shielding layer 5 is wrapped around the outside of the flowmeter body 2. One end of the grounding wire 6 is connected to the electromagnetic shielding layer 5, and the other end is connected to a grounding device outside the housing 1.

[0023] In this embodiment: When the electromagnetic flowmeter is working, the conductive fluid flows in the magnetic field. According to Faraday's law of electromagnetic induction, an induced voltage is generated in the magnetic field perpendicular to the flow direction. This voltage is proportional to the fluid velocity, and the flow rate data can be obtained by measuring the induced voltage. The anti-interference component and the sealing component in this device work together to ensure the stable operation of the electromagnetic flowmeter. Regarding the anti-interference component, the electromagnetic shielding layer 5 wraps around the outside of the flowmeter body 2. The metal braided mesh and conductive coating can shield external electromagnetic interference signals. The grounding wire 6 introduces the interference current induced on the electromagnetic shielding layer 5 into the ground, eliminating the influence of electromagnetic interference on the flowmeter body 2's measurement. Regarding the sealing component, the main sealing ring 3 and the secondary sealing ring 4 are tightly fitted between the outer shell 1 and the flowmeter body 2, preventing liquid leakage and preventing external liquid from entering and affecting the normal operation of the electromagnetic flowmeter. This also prevents the internal electromagnetic components and circuit boards from being corroded by the external environment.

[0024] As a technical optimization of this utility model, an annular sealing groove 7 is provided on the inner side wall of the outer shell 1, the main sealing ring 3 is embedded in the sealing groove 7, and the secondary sealing ring 4 is provided on the outer side of the sealing groove 7. The secondary sealing ring 4 forms a sealing fit with the inner side wall of the outer shell 1 and the outer side wall of the flow meter body 2.

[0025] In this embodiment: the setting of the sealing groove 7 makes the main sealing ring 3 more securely installed, and the secondary sealing ring 4 forms a sealing fit with the outer shell 1 and the flow meter body 2 on the outside of the sealing groove 7, which further enhances the sealing effect, effectively prevents liquid from leaking from the connection, and improves the sealing performance of the device.

[0026] As a technical optimization of this utility model, the main sealing ring 3 is made of silicone rubber material, and the secondary sealing ring 4 is made of polytetrafluoroethylene material.

[0027] In this embodiment: the main sealing ring 3 made of silicone rubber has good elasticity and sealing performance, which can effectively achieve the main sealing function; the secondary sealing ring 4 made of polytetrafluoroethylene has excellent corrosion resistance and low coefficient of friction, which not only enhances the sealing effect, but also reduces the erosion of the main sealing ring 3 by the external environment, extends the service life of the sealing assembly, and improves the reliability and durability of the device.

[0028] As a technical optimization of this utility model, the electromagnetic shielding layer 5 includes an inner metal braided mesh and an outer conductive coating. The metal braided mesh is tightly wrapped around the outside of the flow meter body 2, and the conductive coating is applied to the outside of the metal braided mesh.

[0029] In this embodiment, the inner metal braided mesh and the outer conductive coating are combined. The metal braided mesh first provides initial shielding against electromagnetic interference signals, and the conductive coating further enhances the shielding effect, greatly improving the anti-interference capability of the device and ensuring the measurement accuracy of the flowmeter body 2 in complex electromagnetic environments.

[0030] As a technical optimization of this utility model, the top and bottom of the outer shell 1 are provided with mounting flanges 8, and multiple mounting holes 9 are provided on the mounting flanges 8. Insulating bolts 10 are provided in the mounting holes 9, and insulating gaskets 11 are provided on the heads of the insulating bolts 10. The insulating gaskets 11 are located between the mounting flanges 8 and the bolt heads.

[0031] In this embodiment: the mounting flange 8 facilitates the installation of the device on equipment such as pipes, and the setting of insulating bolts 10 and insulating gaskets 11 prevents the introduction of additional interference signals during the installation process, ensuring the electrical insulation performance between the device and the installed equipment, and improving the anti-interference ability and safety of the device in actual installation and use.

[0032] As a technical optimization of this utility model, a buffer layer 12 is also provided between the inner sidewall of the outer shell 1 and the flow meter body 2. The buffer layer 12 is made of elastic material.

[0033] In this embodiment, the buffer layer 12 made of elastic material can effectively buffer the impact of external vibration on the flow meter body 2, protect the flow meter body 2 from vibration damage, improve the reliability and stability of the device, and extend the service life of the flow meter body 2.

[0034] As a technical optimization of this utility model, a guide groove 13 is provided on the outer side wall of the outer shell 1, and the guide groove 13 is distributed along the circumference of the outer shell 1.

[0035] In this embodiment, the flow guide trough 13 can guide the liquid to flow evenly on the outside of the outer shell 1, reduce the impact of the liquid on the local part of the device, avoid damage to the device due to excessive local impact, extend the service life of the device, and improve the applicability of the device in liquid flow environment.

[0036] Working principle and usage process of this utility model: During installation, the device is mounted on pipelines and other equipment using insulating bolts 10 and insulating gaskets 11 through the mounting holes 9 on the mounting flanges 8 at the top and bottom of the housing 1, ensuring electrical insulation performance during installation. During operation, conductive fluid flows through the electromagnetic flowmeter body 2. At this time, the anti-interference component continuously shields against external electromagnetic interference, and the grounding wire 6 introduces the interference current to the ground. Simultaneously, the sealing component prevents liquid leakage, ensuring that the flowmeter body 2 operates in a stable environment unaffected by external liquid and electromagnetic interference. If there is external vibration, the elastic buffer layer 12 can cushion the vibration, protecting the flowmeter body 2. If the liquid flows outside the device, the guide channel 13 can guide the liquid to flow evenly, reducing localized impact.

[0037] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An interference-proof electromagnetic flowmeter protection sealing device, comprising a housing (1) and a flowmeter body (2) arranged inside the housing (1), characterized in that: A sealing assembly and an anti-interference assembly are provided between the outer shell (1) and the flow meter body (2); the sealing assembly includes a main sealing ring (3) and a secondary sealing ring (4). The main sealing ring (3) is located at the connection between the outer shell (1) and the flow meter body (2), and the secondary sealing ring (4) is located outside the main sealing ring (3). Both the main sealing ring (3) and the secondary sealing ring (4) are tightly fitted to the outer shell (1) and the flow meter body (2); the anti-interference assembly includes an electromagnetic shielding layer (5) and a grounding wire (6). The electromagnetic shielding layer (5) is wrapped around the outside of the flow meter body (2). One end of the grounding wire (6) is connected to the electromagnetic shielding layer (5), and the other end is connected to the grounding device outside the outer shell (1).

2. An electromagnetic flowmeter guard seal according to claim 1, wherein: The inner wall of the outer casing (1) is provided with an annular sealing groove (7), the main sealing ring (3) is embedded in the sealing groove (7), the secondary sealing ring (4) is provided on the outer side of the sealing groove (7), and the secondary sealing ring (4) forms a sealing fit with the inner wall of the outer casing (1) and the outer wall of the flow meter body (2).

3. The anti- interference electromagnetic flowmeter guard seal of claim 1, wherein: The main sealing ring (3) is made of silicone rubber, and the secondary sealing ring (4) is made of polytetrafluoroethylene.

4. The anti- interference electromagnetic flowmeter guard seal of claim 1, wherein: The electromagnetic shielding layer (5) includes an inner metal braided mesh and an outer conductive coating. The metal braided mesh is tightly wrapped around the outside of the flow meter body (2), and the conductive coating is applied to the outside of the metal braided mesh.

5. The anti- interference electromagnetic flowmeter guard seal of claim 1, wherein: The top and bottom of the outer shell (1) are provided with mounting flanges (8), and multiple mounting holes (9) are provided on the mounting flanges (8). Insulating bolts (10) are provided in the mounting holes (9), and insulating gaskets (11) are provided on the heads of the insulating bolts (10). The insulating gaskets (11) are located between the mounting flanges (8) and the bolt heads.

6. The anti- interference electromagnetic flowmeter guard seal of claim 1, wherein: A buffer layer (12) is provided between the inner wall of the outer casing (1) and the flow meter body (2), and the buffer layer (12) is made of elastic material.

7. The anti- interference electromagnetic flowmeter guard seal of claim 1, wherein: A flow guide groove (13) is provided on the outer side wall of the outer shell (1), and the flow guide groove (13) is distributed along the circumference of the outer shell (1).

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