A heating conduit regulating valve

Abstract

The utility model relates to a kind of heating pipeline regulating valve, belong to valve technical field.The heating pipeline regulating valve, comprising: electric regulating valve and the flange connecting mechanism of two quantity, the flange connecting mechanism includes two quantity flange plate, one of which the flange plate fixedly connected and communicated with the one end of electric regulating valve, the opposite end of two flange plate is all set up with placement cavity, the inside embedding installation of placement cavity has two quantity metal sealing ring;Through the liquid guide pipe of warning component communication liquid guide pipe of liquid discharge hole in outer metal sealing ring setting, the physical detection of medium leakage is realized using the linkage mechanism of piston and spring, in combination with the visual observation function of transparent Teflon liquid guide pipe and the electrical signal trigger of pressure alarm, form double leakage early warning system, solve the technical defects that sealing state cannot be monitored in real time in traditional maintenance, provide reliable basis for predictive maintenance.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a regulating valve for heating pipelines. Background Technology

[0002] An electric regulating valve is an automated control valve that uses an electric actuator to drive the valve core, thereby precisely regulating the flow rate, pressure, or temperature of the medium in a pipeline. It is a common type of regulating valve used in heating pipelines. It receives signals from the control system and automatically adjusts its opening degree to achieve closed-loop control of process parameters.

[0003] During long-term operation, the seals of electric control valves are susceptible to aging, damage, and media leakage due to factors such as high temperature and vibration. Currently, sealing performance is mainly maintained by replacing damaged parts or periodic maintenance. However, existing maintenance strategies lack real-time monitoring methods for the seals, making predictive maintenance impossible. This is the main technical bottleneck in the current operation and maintenance management of electric control valves. Utility Model Content

[0004] Therefore, it is necessary to provide a heating pipeline regulating valve to address the current problem of lacking real-time monitoring methods for the sealing components in the operation and maintenance management of electric regulating valves, which makes predictive maintenance impossible.

[0005] A heating pipeline regulating valve includes: an electric regulating valve and two flange connection mechanisms. The flange connection mechanism includes two flanges, one of which is fixedly connected to and communicates with one end of the electric regulating valve. Each of the two flanges has a placement cavity at its opposite ends. Two metal sealing rings are embedded in the placement cavity. The diameter ratio of one metal sealing ring to the other metal sealing ring is 5:7, and one metal sealing ring is disposed inside the other metal sealing ring.

[0006] In one embodiment, a support column is fixedly connected to the inner surface of the other metal sealing ring, and one end of the support column contacts one of the metal sealing rings.

[0007] In one embodiment, the number of support columns is not less than nine, and the support columns are arranged in a ring around the axis of one of the metal sealing rings.

[0008] In one embodiment, the inner surface of the other metal sealing ring is provided with a drain hole, and the flange connection mechanism further includes a warning component. The warning component includes a liquid guide tube fixedly connected to the outer surface of the other metal sealing ring. The top of the liquid guide tube communicates with the drain hole, and the bottom of the liquid guide tube is fixedly connected to a pressure alarm.

[0009] In one embodiment, a piston is slidably connected inside the liquid guide tube, and a spring is provided at the bottom of the piston that contacts the liquid guide tube.

[0010] In one embodiment, the bottom of the liquid guide tube extends through a flange, and the liquid guide tube is a transparent Teflon material component.

[0011] In one embodiment, the vertical cross-sectional shape of the inner side of the liquid guide tube is cross-shaped, and the diameter of the piston is larger than the inner diameter of the two openings of the liquid guide tube.

[0012] In one embodiment, the inner diameter of the spring is larger than the diameter of the detection end of the pressure alarm, and the detection end of the pressure alarm is located inside the spring.

[0013] Beneficial effects 1. The aforementioned heating pipeline regulating valve, by setting a drain hole in the outer metal sealing ring to connect the liquid guide pipe of the warning component, realizes the physical detection of medium leakage through the linkage mechanism of piston and spring. Combined with the visual observation function of the transparent Teflon liquid guide pipe and the electrical signal triggering of the pressure alarm, a dual leakage early warning system is formed, which solves the technical defect of not being able to monitor the sealing status in real time in traditional maintenance and provides a reliable basis for predictive maintenance.

[0014] 2. The flange connection mechanism adopts a double-layer metal sealing ring design with a diameter ratio of 5:7. The smaller diameter metal sealing ring is nested inside the larger diameter metal sealing ring. Together with no less than nine ring-shaped support columns, it forms a radial support structure, which effectively enhances the compressive strength and stability of the sealing surface, significantly reduces the risk of sealing deformation under high temperature vibration conditions, and extends the service life of the sealing assembly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 Schematic sectional view along the middle AA direction; Figure 3 for Figure 1 Cross-sectional view along the middle BB direction; Figure 4 This is a partial structural diagram of the flange connection mechanism in this utility model; Figure 5 This is a partial exploded view of the flange connection mechanism in this utility model.

[0017] Figure label: 100. Electric regulating valve; 200. Flange connection mechanism; 210. Flange; 220. Placement cavity; 230. Metal sealing ring; 231. Drain hole; 240. Support column; 250. Warning assembly; 251. Liquid guide pipe; 252. Pressure alarm; 253. Piston; 254. Spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] The following is combined Figure 1 - Figure 5 This invention describes a regulating valve for heating pipelines.

[0020] In one embodiment, a heating pipeline regulating valve includes: an electric regulating valve 100 and two flange connection mechanisms 200. Each flange connection mechanism 200 includes two flanges 210, one of which is fixedly connected to and communicates with one end of the electric regulating valve 100. Each of the two flanges 210 has a placement cavity 220 at its opposite ends. Two metal sealing rings 230 are embedded inside each placement cavity 220. The diameter ratio of one metal sealing ring 230 to the other metal sealing ring 230 is 5:7. One metal sealing ring 230 is located inside the other metal sealing ring 230. A support column 240 is fixedly connected to the inner surface of the other metal sealing ring 230, with one end of the support column 240 contacting one of the metal sealing rings 230. There are at least nine support columns 240, arranged in a ring around the axis of one of the metal sealing rings 230.

[0021] like Figure 4 and Figure 5As shown, another metal sealing ring 230 has a drain hole 231 on its inner surface. The flange connection mechanism 200 also includes a warning component 250, which includes a liquid guide tube 251 fixedly connected to the outer surface of the other metal sealing ring 230. The top of the liquid guide tube 251 communicates with the drain hole 231, and a pressure alarm 252 is fixedly connected to the bottom of the liquid guide tube 251. A piston 253 is slidably connected inside the liquid guide tube 251. A spring 254 is provided at the bottom of piston 53 to contact the liquid guide tube 251; the bottom of the liquid guide tube 251 extends through the flange 210, and the liquid guide tube 251 is a transparent Teflon material component; the vertical cross-section of the inner side of the liquid guide tube 251 is cross-shaped, and the diameter of piston 253 is larger than the inner diameter of the two openings of the liquid guide tube 251; the inner diameter of spring 254 is larger than the diameter of the detection end of pressure alarm 252, and the detection end of pressure alarm 252 is located inside spring 254.

[0022] In this embodiment, when the electric regulating valve 100 is connected to the pipeline through the flange connection mechanism 200, firstly, the two flanges 210 are fixed to the opposite ends of the electric regulating valve 100 and the pipeline by welding. Then, two metal sealing rings 230 with a diameter ratio of 5:7 are embedded and installed in the placement cavity 220 aligned between the two flanges 210. The smaller diameter metal sealing ring 230 is located inside the larger diameter metal sealing ring 230. Finally, the two flanges 210 are locked together by bolts and nuts. At this time, the electric regulating valve 100 and the opposite pipeline are connected.

[0023] Working principle: This heating pipeline regulating valve adopts a double sealing design. Metal sealing rings 230 with a diameter ratio of 5:7 are embedded in the placement cavities 220 of the two flanges 210 of the flange connection mechanism 200. The smaller diameter metal sealing ring 230 is placed on the inner side, while the larger diameter metal sealing ring 230 is reinforced by no fewer than nine annularly distributed support columns 240. The outer metal sealing ring 230 has a drain hole 231 connected to a liquid guide pipe 251, and an internal piston 253 and spring 254 form a pressure relief channel to ensure reliable sealing.

[0024] When the metal sealing ring 230 fails, the medium enters the liquid guide tube 251 through the drain hole 231, pushing the piston 253 to compress the spring 254. After the piston 253 moves to the bottom of the liquid guide tube 251, it triggers the pressure alarm 252. The transparent Teflon liquid guide tube 251 allows for direct observation of the leak, and its cross-shaped cross section and the limiting design of the piston 253 ensure accurate detection and rapid response.

[0025] It should be noted that the electric regulating valve 100 is described in detail below: The electric regulating valve 100 is a Siemens SKD62 type electric two-way regulating valve, suitable for branch flow regulation in centralized heating systems. The medium is hot water or steam, with an operating pressure ≤16 bar and temperature ≤150℃. Its valve body is made of ductile iron or cast steel, fixed by a flange connection, and the actuator is a SAX61.63 type with an IP67 protection rating. Core components include a stainless steel V-type valve core, PTFE graphite composite gasket seal, and an integrated intelligent positioner, ensuring precise regulation and reliable sealing.

[0026] Operating procedure of electric regulating valve 100: Coarse adjustment stage: Close all branch valves, set the target flow rate (e.g., 50 m³ / h for branch 1 corresponds to an opening of 60%), open the valve to the preset opening and maintain the main pipeline pressure at 0.4-0.6 MPa, use an ultrasonic flow meter to measure the actual flow rate and record the deviation. Fine adjustment stage: For branches with deviation >5%, finely adjust the opening by 2% to 5%, wait for the corresponding time after each adjustment until the flow rate stabilizes, and then remeasure; finally, perform dynamic balance verification, simulate load changes (e.g., close adjacent branches), and ensure that the flow fluctuation of the target branch is ≤3%.

[0027] Precautions Safety precautions: Before adjustment, ensure that the system has been depressurized, and that high-temperature pipelines have been cooled to below 50°C. After the electric actuator is powered off, it must be manually unlocked before operation.

[0028] Troubleshooting: If the flow rate cannot be stabilized, check if the valve is stuck or the pipeline is blocked. If water hammer occurs, the opening should be gradually increased or decreased, with each adjustment interval not less than 30 seconds.

[0029] Data logging: It is recommended to establish an adjustment log to record the final opening, flow rate, and pressure difference of each branch.

[0030] It should be noted that the electric regulating valve 100 and pressure alarm 252 mentioned above are both devices with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the electric regulating valve 100 and pressure alarm 252 can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0031] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A regulating valve for a heating pipeline, characterized in that, include: Electric regulating valve (100); The flange connection mechanism (200) comprises two flanges (210), one of which is fixedly connected to and communicates with one end of an electric regulating valve (100). Each of the two flanges (210) has a placement cavity (220) at its opposite end. Two metal sealing rings (230) are embedded in the placement cavity (220). The diameter ratio of one metal sealing ring (230) to the other metal sealing ring (230) is 5:

7. One metal sealing ring (230) is located inside the other metal sealing ring (230).

2. The heating pipeline regulating valve according to claim 1, characterized in that, A support column (240) is fixedly connected to the inner surface of the other metal sealing ring (230), and one end of the support column (240) is in contact with one of the metal sealing rings (230).

3. The heating pipeline regulating valve according to claim 2, characterized in that, The number of support columns (240) is not less than nine, and the support columns (240) are arranged in a ring around the axis of one of the metal sealing rings (230).

4. The regulating valve for heating pipelines according to claim 1, characterized in that, Another metal sealing ring (230) has a drain hole (231) on its inner surface. The flange connection mechanism (200) also includes a warning component (250). The warning component (250) includes a liquid guide tube (251) fixedly connected to the outer surface of the other metal sealing ring (230). The top of the liquid guide tube (251) is connected to the drain hole (231), and the bottom of the liquid guide tube (251) is fixedly connected to a pressure alarm (252).

5. The heating pipeline regulating valve according to claim 4, characterized in that, A piston (253) is slidably connected inside the liquid guide tube (251), and a spring (254) is provided at the bottom of the piston (253) to contact the liquid guide tube (251).

6. The heating pipeline regulating valve according to claim 4, characterized in that, The bottom of the liquid guide tube (251) extends through the flange (210), and the liquid guide tube (251) is a transparent Teflon material component.

7. The heating pipeline regulating valve according to claim 5, characterized in that, The vertical cross-section of the inner side of the liquid guide tube (251) is cross-shaped, and the diameter of the piston (253) is larger than the inner diameter of the two openings of the liquid guide tube (251).

8. The regulating valve for heating pipelines according to claim 5, characterized in that, The inner diameter of the spring (254) is larger than the diameter of the detection end of the pressure alarm (252), and the detection end of the pressure alarm (252) is located inside the spring (254).

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