A poppet valve for RTO with integrated condition monitoring structure

Abstract

The utility model provides a kind of RTO is lifted valve with integrated condition monitoring structure, it is related to the technical field of lift valve, and it includes: valve body;Base: it is installed on valve body, and two sets of positioning hole are set on it;Valve drive module: including drive cylinder and the valve rod connected with drive cylinder, drive cylinder is installed on base, and drive cylinder is provided with gas path interface;Monitoring module: including magnetostrictive displacement sensor and pressure sensor.Through setting pressure sensor and displacement sensor, the monitoring of lift valve state is realized, sensor installation base is set to the inherent structure of valve body, and basic structural guarantee is provided for high-precision monitoring, exposed cable is converted into embedded pipeline by prefabricated metal threading pipe, the neatness, protection and safety of cable are realized, and the professionalism and reliability of product are improved.

Description

Technical Field

[0001] This utility model relates to the field of lift valve technology, and in particular to a lift valve for RTO with an integrated status monitoring structure. Background Technology

[0002] In RTO equipment, the lift valve is a core component that ensures the accuracy and sealing of airflow switching. Operating under harsh conditions of high temperature and high-frequency start-stop, the valve plate seals, valve stem guide mechanism, and pneumatic drive system are prone to gradual failures such as wear, jamming, or loss of power.

[0003] The existing lift valve has the following structural defects: The valve body itself is a purely mechanical structure, lacking any standardized interfaces or bases for installing status monitoring sensors. Later installation requires on-site drilling and welding, resulting in low construction precision and potential damage to the valve body's integrity. The sensor brackets added later are often non-standard parts with insufficient rigidity, easily shifting or loosening under equipment vibration, leading to drifting and inaccurate monitoring data that fails to accurately reflect the valve's status. Sensor cables lack a standardized laying path, often exposed to high temperatures or interfering with moving parts, posing a risk of ablation, wear, and breakdown, affecting equipment safety. Once a built-in sensor fails, replacement is extremely inconvenient, often requiring extensive disassembly of related components, sometimes even necessitating the removal of the entire valve from the RTO equipment, resulting in extremely high maintenance costs. For these reasons, existing lift valve status monitoring suffers from difficulties in implementation and poor reliability. This application addresses these issues. Utility Model Content

[0004] The purpose of this invention is to provide a lift valve for RTO with an integrated condition monitoring structure, which solves the problems of difficult condition monitoring and poor reliability of current lift valves.

[0005] To address the above problems, this utility model provides a lift valve for an RTO with an integrated condition monitoring structure, comprising:

[0006] Valve body: The main body of the lift valve;

[0007] Base: Mounted on the valve body, and has two sets of positioning holes;

[0008] Valve drive module: includes a drive cylinder and a valve stem connected to the drive cylinder. The drive cylinder is mounted on a base and is equipped with an air passage interface.

[0009] Monitoring module: includes a magnetostrictive displacement sensor and a pressure sensor. The displacement sensor includes a rear sensor, a front sensor and a measuring magnetic ring. The rear sensor and the front sensor are inserted into the positioning hole for installation. The measuring magnetic ring is installed on the valve stem. The pressure sensor is installed at the air circuit interface.

[0010] Cable management module: Includes conduit and waterproof aviation connector. The waterproof aviation connector is mounted on the base, and the conduit is used for cable passage, providing a channel to guide the cable to the location of the waterproof aviation connector.

[0011] By pre-integrating displacement and pressure sensors, measurement interference caused by on-site installation errors and equipment vibration is effectively avoided, ensuring the long-term stability and accuracy of displacement and pressure data.

[0012] By bringing together the scattered sensor cables into an industrial-grade waterproof aviation connector, the entire lift valve becomes a standardized module with "plug and play" functionality, greatly simplifying the on-site installation and subsequent maintenance process.

[0013] The cable is completely protected by the conduit and isolated from high temperatures and moving parts, thus completely eliminating safety hazards such as short circuits and fires caused by cable damage.

[0014] According to one embodiment of the present invention, a three-way connector is connected to the air passage interface, and the other two interfaces of the three-way connector are respectively connected to a pressure sensor and an air intake pipe.

[0015] According to one embodiment of the present invention, both the rear sensor and the front sensor include mounting flanges, and the base is provided with a plurality of bolt holes around the positioning hole. The mounting flanges are connected to the base by bolt assemblies.

[0016] Preferably, four sets of bolt holes are provided.

[0017] According to one embodiment of the present invention, a disc spring washer is provided between the bolt assembly and the mounting flange, which can effectively compensate for the attenuation of bolt preload under high temperature and vibration conditions and prevent loosening.

[0018] According to one embodiment of the present invention, the waterproof aviation plug is installed on the side of the base by bolts.

[0019] According to one embodiment of the present invention, the conduit is made of metal to ensure its protective performance.

[0020] According to one embodiment of the present invention, the base and the valve body are integrally formed.

[0021] According to one embodiment of the present invention, the base is welded or bolted to the valve body.

[0022] According to one embodiment of the present invention, the base is connected to the fixing plate, and a plurality of reinforcing plates are provided between the two. The fixing plate is connected to the valve body by bolts.

[0023] According to one embodiment of the present invention, the valve body is provided with an inspection port.

[0024] The beneficial effects of this invention are as follows: By setting pressure and displacement sensors, the status of the lift valve can be monitored. The base for sensor installation is an inherent structure of the valve body, providing a fundamental structural guarantee for high-precision monitoring. The rigid connection of the displacement sensors solves the measurement lag and data fluctuation problems easily caused by traditional flexible or non-rigid connection methods. Exposed cables are transformed into embedded conduits through prefabricated metal conduits, achieving cable neatness, protection, and safety, thus improving the product's professionalism and reliability. The dispersed sensor cables are gathered into an industrial-grade waterproof aviation connector, making the entire lift valve a standardized module with "plug-and-play" functionality. This greatly simplifies on-site installation and subsequent maintenance processes. When a sensor needs to be replaced, there is no need for extensive disassembly of surrounding components, reducing the average repair time from several hours to tens of minutes. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 A schematic diagram of the overall structure of a lift valve for an RTO with an integrated condition monitoring system;

[0027] Figure 2 This is a schematic diagram of the base structure;

[0028] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle;

[0029] In the diagram: 1. Valve body; 2. Inspection port; 3. Inlet / outlet flange; 4. Valve plate; 5. Base; 6. Drive cylinder; 7. Air circuit interface; 8. Waterproof aviation plug; 9. Conduit; 10. Measuring magnetic ring; 11. Sensor mounting plate; 12. Rear sensor; 13. Front sensor; 14. Mounting plate; 15. Reinforcing plate; 16. Pressure sensor; 17. Inlet pipe; 19. Mounting flange; 20. Bolt assembly; 21. Positioning hole; 22. Valve stem. Detailed Implementation

[0030] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0031]

Example 1

[0032] A lift valve for an RTO with an integrated condition monitoring structure, such as Figures 1-3 ,include:

[0033] Valve body 1: This is the main body of the lift valve. It has a valve plate 4 inside and inlet / outlet flanges 3 on both sides. The valve body 1 is made of 5mm thick Q235B carbon steel plate welded together, or it can be integrally formed by casting HT250 gray cast iron.

[0034] Base 5: Installed on valve body 1, and has two sets of positioning holes 21.

[0035] The base 5 is preferably made of the same material as the valve body.

[0036] Optionally, the base 5 and the valve body 1 can be connected in the following ways:

[0037] In the welding process, the base is a separate forging. Its lower surface is milled by a machine tool to perfectly match the curvature of the outer wall of the valve body. Then, it is circumferentially welded using gas shielded welding (such as CO2 gas shielded welding). The weld leg height is not less than 6mm to ensure connection strength and sealing and prevent exhaust gas leakage.

[0038] In the casting process, the boss base is integrally cast with the valve body, which fundamentally eliminates the problems of thermal deformation and stress concentration that may be caused by welding.

[0039] The base 5 and the valve body 1 can also be connected by bolts. The end of the base 5 is provided with a fixing plate 14, and several reinforcing plates 15 are provided between the two. The fixing plate 14 and the valve body 1 are connected by bolts.

[0040] After the valve body has been initially machined, the upper surface and internal structure of the boss base are precision machined.

[0041] First, use a vertical machining center to mill the upper surface of the base flat, ensuring that the parallelism error between it and the mounting reference surface of the valve stem hole is no more than 0.05mm.

[0042] A sensor mounting plate 11 extending into the hole of the valve body 1 is installed on the base. Of the two positioning holes, one positioning hole is located on the base body and the other positioning hole is located on the sensor mounting plate 11 inside the hole of the valve body 1. The sensor is used as a radial positioning reference for the displacement sensor measuring body by using the hole as a reference. Four evenly distributed threaded holes are drilled around the positioning hole for fastening the sensor.

[0043] Cable management module: includes conduit 9 and waterproof aviation plug 8. The waterproof aviation plug 8 is mounted on base 5. Conduit 9 is used for cable passage, providing a channel to guide the cable to the location of the waterproof aviation plug 8.

[0044] Conduit 9 is made of metal, preferably 304 stainless steel with an outer diameter of 25mm and a wall thickness of 1.5mm, to ensure the protective performance of the conduit.

[0045] The conduit 9 includes a portion inside the base 5 and an outer portion, preferably T-shaped, with both ends of the outer, horizontally arranged conduit usable for inserting cables.

[0046] The aviation connector can be selected from the M12 or M16 series. Its outer shell is made of nickel-plated brass and the inside is potted with silicone rubber to ensure long-term stable operation in the high temperature and dusty environment next to the RTO equipment. The waterproof aviation connector 8 is installed on the side of the base 5 by bolts.

[0047] Valve drive module: includes drive cylinder 6 and valve stem 22 connected to drive cylinder 6. Drive cylinder 6 is mounted on base 5 and is provided with air passage interface 7. Air passage interface 7 is used to connect to air intake pipe 17 and pressure sensor.

[0048] Monitoring module: includes a magnetostrictive displacement sensor and a pressure sensor 16. The displacement sensor includes a rear sensor 12, a front sensor 13 and a measuring magnetic ring 10. The rear sensor 12 and the front sensor 13 are inserted into the positioning hole 21 for installation. The measuring magnetic ring 10 is installed on the valve stem 22. The pressure sensor 16 is installed at the air circuit interface 7.

[0049] The rear sensor 12 and the front sensor 13 have the same structure. The outside is a stainless steel protective tube and the inside is a waveguide. The measuring magnetic ring has a standard stainless steel mounting clip and is fixed to the valve stem with screws.

[0050] Both the rear sensor 12 and the front sensor 13 include a mounting flange 19. The base 5 has several bolt holes around the positioning hole 21. The mounting flange 19 is connected to the base 5 and the sensor fixing plate 11 by a bolt assembly 20. A disc spring washer is provided between the bolt assembly 20 and the mounting flange 19, which can effectively compensate for the attenuation of bolt preload under high temperature and vibration conditions and prevent loosening.

[0051] In other embodiments, two diagonally positioned locating pins may be provided around each locating hole, and corresponding locating pin holes may be provided on the mounting flange 19. During installation, the mounting flange is first placed on the locating pins, and then bolts are used to fix it to ensure that there is no installation error in the torsional direction.

[0052] A brass tee fitting is added between the intake pipe 17 and the air interface 7 of the drive cylinder. A G1 / 4 internal thread is machined on one branch of this tee fitting.

[0053] A compact pressure sensor with a range of 0-1.0MPa and a G1 / 4 external thread interface was directly screwed into the tee and sealed with PTFE tape.

[0054] The output cables of both the displacement sensor and the pressure sensor are shielded cables with high-temperature resistant fluoroplastic insulation.

[0055] Starting near the base, insert the two cables into the pre-embedded metal conduit, extending them from the outer conduit into the inner conduit of the base. The outlet at the bottom of the conduit is located at the mounting hole of the aviation plug. Strip an appropriate length of insulation from the cable ends and solder the core wires to the corresponding terminals of a 5-core industrial-grade waterproof aviation plug (IP67 protection level) female connector.

[0056] Functionality verification:

[0057] During the factory commissioning phase, the booster valve will be connected to the air and power supply.

[0058] Manually control the valve to perform its full stroke (from fully closed to fully open) several times, while simultaneously using a calibration instrument to read the output signal of the displacement sensor (e.g., 4-20mA) to ensure good linearity and that the fully closed / fully open position signals correspond perfectly with the mechanical limit.

[0059] At this point, the lift valve has become a complete functional unit integrating a status monitoring structure. The monitoring module and the valve body form an integrated structure that can be packaged and shipped.

[0060] On-site installation and use:

[0061] On-site installation personnel only need to hoist the entire lift valve onto the base of the RTO equipment and connect the process piping and pneumatic piping.

[0062] For electrical connections, simply insert the pre-fabricated male cable (the other end of which connects to the RTO control cabinet) into the aviation plug female on the valve body and tighten its threaded locking ring.

[0063] From this point on, the RTO's main control system (PLC / DCS) can acquire the precise position signal of the valve stem and the driving air pressure signal in real time and at high speed through this standard interface, providing a solid and reliable hardware foundation for equipment status monitoring, predictive maintenance and intelligent management.

[0064] The advantages of this solution are:

[0065] Transforming the sensor mounting base from an "additional accessory" to an "inherent structural feature of the valve body" provides a fundamental structural guarantee for high-precision monitoring. The sensor is installed through a high-precision base and rigid connectors, and its relative position to the valve body and valve stem is fixed at the factory. This effectively avoids measurement interference caused by on-site installation errors and equipment vibration, ensuring the long-term stability and accuracy of displacement and pressure data.

[0066] By pre-integrating displacement and pressure sensors, measurement interference caused by on-site installation errors and equipment vibration is effectively avoided, ensuring the long-term stability and accuracy of displacement and pressure data.

[0067] By bringing together the scattered sensor cables into an industrial-grade waterproof aviation connector, the entire lift valve becomes a standardized module with "plug and play" functionality, greatly simplifying the on-site installation and subsequent maintenance process.

[0068] The cable is completely protected by the conduit and isolated from high temperatures and moving parts, thus completely eliminating safety hazards such as short circuits and fires caused by cable damage.

[0069] When a sensor needs to be replaced, maintenance personnel can quickly remove the entire sensor module by simply unscrewing the base bolts and unplugging the aviation connector, without having to disassemble the valve or disassemble a large area of ​​surrounding components, reducing the average maintenance time from several hours to ten minutes.

[0070] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A lift valve for an RTO with an integrated condition monitoring structure, characterized in that: include: Valve body (1): the main body of the lift valve; Base (5): Connected to valve body (1), and has two sets of positioning holes (21). Valve drive module: includes a drive cylinder (6) and a valve stem (22) connected to the drive cylinder (6). The drive cylinder (6) is mounted on the base (5) and the drive cylinder (6) is provided with an air passage interface (7). Monitoring module: includes displacement sensor and pressure sensor (16). The displacement sensor includes rear sensor (12), front sensor (13) and measuring magnetic ring (10). The rear sensor (12) and front sensor (13) are inserted into positioning hole (21) for installation. The measuring magnetic ring (10) is installed on valve stem (22). The pressure sensor (16) is installed at air circuit interface (7). Cable management module: includes a conduit (9) and a waterproof aviation plug (8). The waterproof aviation plug (8) is mounted on the base (5). The conduit (9) is used for cable passage, providing a channel to guide the cable to the location of the waterproof aviation plug (8).

2. The lift valve for an RTO with an integrated condition monitoring structure according to claim 1, characterized in that: A three-way connector is connected to the air passage interface (7), and the other two interfaces of the three-way connector are respectively connected to the pressure sensor (16) and the air intake pipe (17).

3. The lift valve for an RTO with an integrated condition monitoring structure according to claim 1, characterized in that: Both the rear sensor (12) and the front sensor (13) include a mounting flange (19). The base (5) has several bolt holes around the positioning hole (21). The mounting flange (19) is connected to the base (5) by a bolt assembly (20).

4. The lift valve for an RTO with an integrated condition monitoring structure according to claim 3, characterized in that: A disc spring washer is provided between the bolt assembly (20) and the mounting flange (19).

5. The lift valve for an RTO with an integrated condition monitoring structure according to any one of claims 1-4, characterized in that: The waterproof aviation plug (8) is installed on the side of the base (5) by bolts.

6. The lift valve for an RTO with an integrated condition monitoring structure according to claim 1, characterized in that: The conduit (9) is made of metal.

7. The lift valve for an RTO with an integrated condition monitoring structure according to any one of claims 1-4, characterized in that: The base (5) is integrally formed with the valve body (1).

8. The lift valve for an RTO with an integrated condition monitoring structure according to any one of claims 1-4, characterized in that: The base (5) is welded or bolted to the valve body (1).

9. The lift valve for an RTO with an integrated condition monitoring structure according to any one of claims 1-4, characterized in that: The base (5) is connected to the fixing plate (14), and a number of reinforcing plates (15) are provided between them. The fixing plate (14) is connected to the valve body (1) by bolts.

10. The lift valve for an RTO with an integrated condition monitoring structure according to claim 1, characterized in that: The valve body (1) is provided with an inspection port (2).

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