Control valve for urban heating pipelines

Abstract

The utility model belongs to city heating pipeline control valve technical field, and disclose a kind of control valve for city heating pipeline, including control valve main part;The surface of control valve main part is equipped with connecting leakproof component, the connecting leakproof component includes the sealing pipe being installed in the control valve main part inlet and outlet both ends by flange and the rubber ring and the shrink tube for sealing, inlay groove, the ring of sticking, close ring being set in the sealing pipe away from the control valve main part one end;The surface of rubber ring is equipped with aging replacement component, the aging replacement component includes multiple positioning strip being evenly installed in the rubber ring near the control valve main part one end and the positioning groove being opened in the surface of sealing pipe, the utility model has can improve the sealing of control valve and the connecting place of pipeline, avoid medium from the connecting place of control valve and pipeline leakage, improve the safety performance used by control valve, satisfy the advantage that the demand of heating system long-term stable operation.

Description

Technical Field

[0001] This utility model belongs to the technical field of urban heating pipeline control valves, specifically a control valve for urban heating pipelines. Background Technology

[0002] In winter heating systems in northern cities, heating pipes serve as the core carrier of heat transfer, and their operational stability directly affects residents' quality of life and the normal operation of urban infrastructure. Control valves, as key regulating components in the heating pipe system, primarily undertake important functions such as regulating medium flow, controlling the temperature of the heating area, and realizing system zoning management. The reliability of their connection with the pipelines is one of the core links ensuring the trouble-free operation of the entire heating system. Currently, most mainstream urban heating pipeline control valves on the market use traditional flange connections, threaded connections, or socket connections when connecting to pipelines. However, these connection structures have a significant technical flaw in practical applications: they cannot provide long-term, reliable leak-proof treatment at the connection point. As the service time increases after the control valve is connected to the pipeline, heating medium leakage is very likely to occur at the connection point. When the ambient temperature or the temperature of the medium changes, the connecting parts of the control valve and the pipeline will undergo slight displacement due to the difference in the thermal expansion coefficients of the materials. Once a leak occurs at the connection between the control valve and the pipeline, it will cause waste of heating medium, increase the operating cost of the heating system, and make it inconvenient to repair the control valve and pipeline. It is necessary to replace the entire control valve or connecting pipeline, which consumes a lot of manpower and resources, increases safety hazards and operating costs.

[0003] Therefore, a control valve for urban heating pipelines is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a control valve for urban heating pipelines, which has the advantages of improving the sealing performance at the connection between the control valve and the pipeline, preventing media leakage from the connection between the control valve and the pipeline, improving the safety performance of the control valve, and meeting the requirements for long-term stable operation of the heating system.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a control valve for urban heating pipelines, comprising a control valve body; The surface of the control valve body is equipped with a connection anti-leakage assembly, which includes a sealing pipe installed at both ends of the control valve body via a flange, a rubber ring disposed at the end of the sealing pipe away from the control valve body, and a tightening tube, an insert groove, a fitting ring, and a sealing ring for sealing. An aging replacement assembly is installed on the surface of the rubber ring. The aging replacement assembly includes multiple positioning strips evenly installed on one end of the rubber ring near the control valve body, a positioning groove formed on the surface of the sealing tube, and a fixing plate and bolts for fixing.

[0006] Preferably, the tightening tube is disposed inside the sealing tube and installed on one side surface of the rubber ring, the fitting ring is installed on the tightening end of the tightening tube, the inlay groove is formed on the inner side wall of the fitting ring, and the tight ring is inlaid inside the inlay groove.

[0007] Preferably, the end of the tightening tube furthest from the control valve body has a large opening, while the end of the tightening tube closest to the control valve body has a small opening.

[0008] Preferably, the inner diameter of the tight ring is uniformly distributed with multiple friction pads, and the multiple friction pads are arranged in a circumferential array with respect to the center point of the tight ring.

[0009] Preferably, the rubber ring is a temperature-resistant expansion sealing strip.

[0010] Preferably, the positioning strip is inserted into the positioning groove.

[0011] Preferably, the bolt is threaded into a threaded hole on the surface of the fixing plate, and one end of the bolt passes through the fixing plate and is threaded into a threaded hole on the surface of the sealing tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model incorporates a connection leak-proof component, with a sealing pipe serving as a connection transition piece. Together with a rubber ring, a tightening tube, a fitting ring, and a tight ring, it forms a dual sealing structure of end face sealing and radial compression sealing. Compared to existing single sealing methods, this significantly reduces the risk of heating medium leakage from the connection point. Especially for heating systems operating under high temperature and high pressure conditions, this combined structure can effectively resist the impact of the medium on the sealing surface, extend the sealing failure cycle, and ensure long-term stable operation of the system.

[0013] 2. This utility model, by setting up an aging replacement component, ensures the accuracy of rubber ring installation through the insertion and cooperation of positioning strip and positioning groove, combined with the rigid fixation of fixing plate and bolts. When rubber ring and other components age due to long-term use, only the bolts and fixing plate need to be removed to pull out the old rubber ring and other components and replace them with new ones, which shortens maintenance time, reduces labor costs, and avoids interference with the normal operation of the heating system during the maintenance process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the sealing tube and rubber ring of this utility model; Figure 3 This is a schematic diagram of the structure of the rubber ring and tightening tube of this utility model; Figure 4 This is a schematic diagram of the fitting ring and inlay groove of this utility model; Figure 5 This is a schematic diagram of the fitting ring and tight ring of this utility model.

[0015] In the diagram: 1. Control valve body; 2. Connection anti-leakage assembly; 21. Sealing pipe; 22. Rubber ring; 23. Tightening pipe; 24. Embedding groove; 25. Fitting ring; 26. Tightening ring; 3. Aging replacement assembly; 31. Positioning strip; 32. Positioning groove; 33. Fixing plate; 34. Bolt. Detailed Implementation

[0016] 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.

[0017] like Figures 1 to 5 As shown, this utility model provides a control valve for urban heating pipelines, including a control valve body 1; The surface of the control valve body 1 is equipped with a connection anti-leakage assembly 2. The connection anti-leakage assembly 2 includes a sealing pipe 21 installed at the inlet and outlet ends of the control valve body 1 through a flange, a rubber ring 22 disposed at the end of the sealing pipe 21 away from the control valve body 1, and a tightening pipe 23, an insert groove 24, a fitting ring 25, and a tight ring 26 for sealing. The tightening tube 23 is located inside the sealing tube 21 and installed on one side surface of the rubber ring 22. The fitting ring 25 is installed at the tightening end of the tightening tube 23. The inlay groove 24 is opened on the inner side wall of the fitting ring 25. The tight ring 26 is embedded in the inlay groove 24. The sealing tube 21 serves as a connecting transition piece. Together with the rubber ring 22, the tightening tube 23, the fitting ring 25, and the tight ring 26, it forms a dual sealing structure of end face sealing and radial compression sealing. Compared with the existing single sealing method, it significantly reduces the risk of heating medium leakage from the connection. Especially for the high temperature and high pressure conditions of the heating system, this combined structure can effectively resist the impact of the medium on the sealing surface, extend the sealing failure cycle, and ensure the long-term stable operation of the system.

[0018] The end of the tightening tube 23 furthest from the control valve body 1 has a large opening, while the end of the tightening tube 23 closest to the control valve body 1 has a small opening. The tapered structure of the tightening tube 23 allows the pipe to move along the inner wall of the tightening tube 23 toward the small opening end during insertion, naturally pushing the fitting ring 25 and the tight ring 26 against the outer wall of the pipe, forming a radial sealing effect that gets tighter as it is inserted, without the need for additional external force for tightening. At the same time, this tapered structure can adapt to pipes of different outer diameters (within a reasonable error range), improving the compatibility between the tightening tube 23 and the pipe.

[0019] Multiple friction pads are evenly distributed on the inner diameter of the tight ring 26, and the multiple friction pads are arranged in a circumferential array around the center point of the tight ring 26. The friction pads on the inner diameter of the tight ring 26 directly contact the outer wall of the pipeline. By increasing the friction of the contact surface, the sealing reliability is significantly improved.

[0020] The rubber ring 22 is a temperature-resistant expansion sealing strip. When the high-temperature medium flows through the control valve body 1, the rubber ring 22 will expand slightly due to heat. Its contact surface with the pipeline end face and the sealing pipe 21 port will be further squeezed, filling the small gaps that appear during initial installation or long-term use, forming a dynamic sealing compensation effect. This avoids the sealing failure caused by the high-temperature shrinkage of the existing rubber ring 22 and ensures the sealing reliability during long-term operation.

[0021] The surface of the rubber ring 22 is equipped with an aging replacement component 3. The aging replacement component 3 includes multiple positioning strips 31 evenly installed on one end of the rubber ring 22 near the control valve body 1, as well as positioning grooves 32 opened on the surface of the sealing tube 21 and fixing plates 33 and bolts 34 for fixing. The positioning strip 31 is inserted into the positioning groove 32. Through the insertion and cooperation of the positioning strip 31 and the positioning groove 32, combined with the rigid fixation of the fixing plate 33 and the bolt 34, the installation accuracy of the rubber ring 22 is ensured. When the rubber ring 22 and other components age due to long-term use, it is only necessary to remove the bolt 34 and the fixing plate 33 to pull out the old rubber ring 22 and other components and replace them with new ones, which shortens the maintenance time, reduces labor costs, and avoids interference with the normal operation of the heating system during the maintenance process.

[0022] Bolt 34 is threaded into a threaded hole on the surface of fixing plate 33, and one end of bolt 34 passes through fixing plate 33 and is threaded into a threaded hole on the surface of sealing tube 21. The threaded connection of bolt 34 makes fixing plate 33 easy to disassemble and reduces maintenance costs.

[0023] Among them, the structure of the control valve body 1 is existing technology, and its working principle is a well-known technology. The appropriate model is selected according to the actual use.

[0024] Working principle and process: The rubber ring 22, made of heat-resistant expansion sealing strip, is fixed by the positioning structure of the aging replacement component 3. The positioning strip 31 of the rubber ring 22 near the control valve body 1 is aligned with the positioning groove 32 on the surface of the sealing tube 21 and inserted to achieve the initial positioning of the rubber ring 22. Then, the fixing plate 33 is covered on the outside of the positioning strip 31. The bolt 34 is passed through the threaded hole on the surface of the fixing plate 33 and screwed into the corresponding threaded hole of the sealing tube 21. The rubber ring 22 is firmly fixed to the end of the sealing tube 21 away from the control valve body 1 by tightening the bolt 34, thus completing the rigid connection between the rubber ring 22 and the sealing tube 21, thereby realizing the installation operation of the entire device. Insert the end of the heating pipe into the large opening end of the tightening tube 23 until the outer wall of the pipe is in complete contact with the friction pad of the tight ring 26. Since the tightening tube 23 has a tapered structure with the large end in and the small end out, the pipe will gradually move towards the small opening end along the inner wall of the tightening tube 23 during the insertion process, causing the fitting ring 25 to drive the tight ring 26 to squeeze towards the outer wall of the pipe. At the same time, the rubber ring 22 fits against the end face of the pipe, forming a dual initial sealing structure of radial compression seal and end face fitting seal. Since the rubber ring 22 is made of a temperature-resistant expansion sealing strip, when the high-temperature medium flows through the control valve, the rubber ring 22 will expand slightly due to heat. Its contact surface with the pipeline end face and the sealing pipe 21 port will be further squeezed, filling the small gaps that may exist in the initial installation, enhancing the reliability of the end face seal. At the same time, the temperature resistance of the rubber ring 22 can withstand the high temperature of the medium of 80-150℃, avoiding the seal failure due to high temperature aging. The friction convex pads on the inner diameter of the tight ring 26 will form a strong friction with the outer wall of the pipeline, preventing the pipeline from shifting. At the same time, under the constraint of the conical structure of the tightening tube 23, the fitting ring 25 always applies radial pressure to the tight ring 26, ensuring the fitting strength between the tight ring 26 and the outer wall of the pipeline, and preventing the medium from leaking from the radial gap. If system pressure fluctuations cause slight vibrations or displacements in the pipeline, the tapered structure of the tightening tube 23 can adjust the squeezing force of the fitting ring 25 through its own elastic deformation, avoiding the sealing surface from detaching due to pressure fluctuations, achieving adaptive sealing compensation for changes in operating conditions, and maintaining a long-term stable sealing effect. After the control valve has been running for a long time, components such as the rubber ring 22 may experience a decline in sealing performance due to aging. In this case, the aging replacement component 3 can be used for convenient replacement without disassembling the entire connection structure. The specific steps are as follows: Unscrew the bolts 34 on the surface of the fixing plate 33 until the bolts 34 are completely disengaged from the threaded hole of the sealing tube 21. Then remove the fixing plate 33, release the fixing constraint on the positioning strip 31, and take out the aged rubber ring 22 as a whole: Pull out the positioning strip 31 of the rubber ring 22 along the axial direction of the positioning groove 32, and the aged rubber ring 22 can be removed from the port of the sealing tube 21. Align the positioning strip 31 of the new rubber ring 22 with the positioning groove 32 and insert it. Cover the fixing plate 33 and screw in the bolts 34 until the bolts 34 are tightened. The replacement of the structure is completed. After replacement, restart the system to ensure that the control valve continues to operate stably.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A control valve for urban heating pipelines, comprising a control valve body (1); Its features are: The surface of the control valve body (1) is equipped with a connection anti-leakage assembly (2). The connection anti-leakage assembly (2) includes a sealing tube (21) installed at both ends of the control valve body (1) through a flange, a rubber ring (22) disposed at the end of the sealing tube (21) away from the control valve body (1), and a tightening tube (23), an insert groove (24), a fitting ring (25), and a tight ring (26) for sealing. The surface of the rubber ring (22) is equipped with an aging replacement component (3). The aging replacement component (3) includes multiple positioning strips (31) evenly installed on one end of the rubber ring (22) near the control valve body (1), a positioning groove (32) opened on the surface of the sealing tube (21), and a fixing plate (33) and bolts (34) for fixing.

2. A control valve for urban heating pipelines according to claim 1, characterized in that: The tightening tube (23) is disposed inside the sealing tube (21) and installed on one side surface of the rubber ring (22). The fitting ring (25) is installed at the tightening end of the tightening tube (23). The inlay groove (24) is opened on the inner side wall of the fitting ring (25). The tight ring (26) is inlaid inside the inlay groove (24).

3. A control valve for urban heating pipelines according to claim 1, characterized in that: The end of the tightening tube (23) away from the control valve body (1) has a large opening structure, and the end of the tightening tube (23) close to the control valve body (1) has a small opening structure.

4. A control valve for urban heating pipelines according to claim 1, characterized in that: The inner diameter of the tight ring (26) is uniformly distributed with multiple friction pads, and the multiple friction pads are arranged in a circular array around the center point of the tight ring (26).

5. A control valve for urban heating pipelines according to claim 1, characterized in that: The rubber ring (22) is a temperature-resistant expansion sealing strip.

6. A control valve for urban heating pipelines according to claim 1, characterized in that: The positioning strip (31) is inserted into the positioning groove (32).

7. A control valve for urban heating pipelines according to claim 1, characterized in that: The bolt (34) is threaded into a threaded hole on the surface of the fixing plate (33), and one end of the bolt (34) passes through the fixing plate (33) and is threaded into a threaded hole on the surface of the sealing tube (21).

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