A connection joint for a heating network pipe

Abstract

The present application relates to the technical field of pipeline connection, in particular to a connection joint of a heat supply network pipe, comprising a communication pipe, which is a flexible hose; the connection joint of the heat supply network pipe further comprises a clamping unit, which is provided with two and symmetrically connected at both ends of the communication pipe. The angle adjusting unit adopted in the present application can adjust the included angle between the two clamping units, effectively increasing the use scenarios of the connection joint; the cooperation of the threaded sleeve and the threaded teeth drives the movement of the two elastic expansion parts, the two elastic expansion parts drive the rotation of the two clamping joints, realizing the function of flexible adjustment of the included angle of the clamping joint, which is not only suitable for the connection of the heat supply network pipe with clear planning path, but also suitable for the actual scenarios such as angle deviation and misplacement in the on-site installation of the pipeline, without the need for additional cutting or adjustment of the laid pipeline, effectively shortening the period of pipeline laying and reducing the cost.

Description

Technical Field

[0001] This invention relates to the field of pipeline connection technology, and in particular to a connection joint for heating network pipes. Background Technology

[0002] During the installation and operation of heating systems, the connecting joints, as the core connecting components of the heating network, directly affect the operating efficiency and safety of the heating system due to their connection stability, angle adaptability, and thermal displacement compensation capabilities.

[0003] Connections between heating network pipes can be straight or angular. Existing angular connectors typically have fixed angles, making them suitable only for pre-planned laying paths. However, in complex construction environments such as renovations of older residential areas, building risers often exhibit significant verticality deviations. Furthermore, dimensional errors can occur during pipe prefabrication, and angular deviations may arise during on-site installation. Fixed-angle connectors cannot accommodate these deviations, significantly increasing connection difficulty and requiring pipe adjustments to extend the laying period. Additionally, angular connectors are located at pipe bends, where displacement from end-compensator components can create stress concentrations. This necessitates the installation of additional flexible compensation connectors to absorb localized displacement, increasing operational steps and costs. Moreover, flexible compensation connectors cannot re-clamp and limit pipe movement during use. Over time, gaps can develop at the connection between the heating network pipe and the flexible compensation connector, leading to leakage of the heating medium and reducing the stability of the heating operation.

[0004] Therefore, there is an urgent need to provide a heating network pipe connection joint that can improve applicability and connection strength. Summary of the Invention

[0005] Therefore, it is necessary to provide a connection joint for a heating network pipe, which aims to solve the problems of low applicability and low connection strength when connecting existing heating network pipes with connection joints.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a connecting joint for a heating network pipe, comprising: a connecting pipe, wherein the connecting pipe is a flexible hose.

[0007] The connection joint of the heating network pipe also includes a snap-fit ​​unit. Two snap-fit ​​units are provided and symmetrically connected to both ends of the connecting pipe. The snap-fit ​​unit includes a snap-fit ​​connector connected to the end of the connecting pipe and used to fit the heating network pipe.

[0008] The connection joint of the heating network pipe also includes an angle adjustment unit, which is connected between two clamping joints. The angle adjustment unit includes elastic telescopic parts that are respectively hinged to the two clamping joints. The thermal displacement generated by the heating network pipe is compensated by the change in shape of the elastic telescopic parts. An adjustment part is connected between the two elastic telescopic parts to adjust the distance between the two elastic telescopic parts in order to change the included angle of the two clamping joints.

[0009] The connection joint of the heating network pipe also includes a tensioning unit, which is simultaneously installed on the connecting pipe and two clamping joints. The tensioning unit includes a positioning part fixedly installed in the middle of the outer periphery of the connecting pipe, and tensioning parts are respectively connected to the two clamping joints. Each tensioning part is connected to the positioning part through two traction rods. During thermal displacement compensation, the clamping joints drive the tensioning part to move, and the positioning part adjusts the tensioning part through the traction rods and drives the tensioning part to squeeze the heating network pipe.

[0010] The tensioning part includes a limiting ring sleeved on the snap connector. Multiple clamping components are slidably connected to the limiting ring. The ends of the multiple clamping components away from the axis of the limiting ring are connected to the clamping ring. The clamping ring is hinged to two corresponding traction rods.

[0011] Preferably, the snap-fit ​​unit further includes a snap-fit ​​sleeve that mates with the snap-fit ​​connector and is used to press and fix the heating network pipe onto the snap-fit ​​connector.

[0012] Preferably, the elastic telescopic part includes a rotating frame hinged to the snap-fit ​​connector, a sliding rod slidably connected to the end of the rotating frame away from the snap-fit ​​connector, and a connecting spring installed between the sliding rod and the inner end wall of the rotating frame.

[0013] Preferably, the adjusting part includes a positioning frame installed on the outer periphery of any one of the sliding rods, a threaded sleeve sleeved on the corresponding sliding rod is rotatably connected inside the positioning frame, and a threaded tooth is installed on the outer ring surface of the other sliding rod, the threaded tooth being threadedly connected to the threaded sleeve.

[0014] Preferably, the positioning part includes a positioning sleeve installed in the middle of the outer annular surface of the connecting pipe, and positioning screws are threaded to both the front and rear ends of the positioning sleeve.

[0015] Preferably, the clamping component includes a sliding block that slides through the limiting ring, a clamping arc plate is installed at one end of the sliding block near the axis of the limiting ring, and a sliding groove with an isosceles trapezoidal cross section is opened at the other end of the sliding block away from the clamping arc plate.

[0016] Preferably, the inner ring surface of the clamping ring is provided with an annular protrusion with an isosceles trapezoidal cross section. The annular protrusion cooperates with multiple sliding grooves at the same time. When the clamping ring moves in any direction along the axis of the limiting ring, the annular protrusion squeezes the multiple sliding grooves, so that multiple clamping components simultaneously clamp the end of the heating network pipe.

[0017] Preferably, the traction rod has multiple evenly distributed insertion holes at one end near the positioning sleeve, and the insertion holes are engaged with the positioning screw.

[0018] Preferably, the traction rods connected to the two clamping rings have the same structure but different sizes, and the traction rods on the same side of the two clamping rings are staggered and meet at the positioning sleeve.

[0019] Preferably, the sliding block is equipped with an anti-detachment rod, which is located outside the limiting ring.

[0020] Preferably, the inner arc surface of the pressing arc plate is covered with an anti-slip pad, and multiple pressing arc plates form a ring structure.

[0021] In summary, the present invention has the following beneficial technical effects: 1. The angle adjustment unit used in the present invention can adjust the included angle between the two snap-fit ​​units, effectively increasing the application scenarios of the connection joint; the cooperation between the threaded sleeve and the threaded teeth drives the two elastic telescopic parts to move, and the two elastic telescopic parts drive the two snap-fit ​​joints to rotate, realizing the function of flexibly adjusting the included angle of the snap-fit ​​joint. It is not only suitable for heating network pipe connections with clear planned paths, but also suitable for actual scenarios such as angle deviations and misalignments that occur during on-site pipe installation. There is no need to cut or adjust the already laid pipes, effectively shortening the pipe laying cycle and reducing costs.

[0022] 2. The angle adjustment unit used in this invention can not only adjust the connection angle of the heating network pipe, but also compensate for its thermal displacement during use, avoiding gaps between the heating network pipe and the clamping joint due to thermal expansion and contraction. While the elastic expansion part compensates for the thermal displacement of the heating network pipe by changing its shape, the tensioning unit and the clamping component work together. When the clamping joint rotates with the thermal displacement, the moving sliding block cooperates with the inclined surface of the annular protrusion of the clamping ring through the sliding groove, driving multiple clamping arc plates to simultaneously clamp the end of the heating network pipe. Regardless of the thermal displacement of the heating network pipe in different directions, the clamping arc plates can always maintain effective clamping of the end of the heating network pipe, further enhancing the connection and sealing strength between the heating network pipe and the clamping joint, preventing leakage of the heating medium, and ensuring the stable operation of the heating system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0025] Figure 2 A front view of the present invention is shown.

[0026] Figure 3 A left view of the present invention is shown.

[0027] Figure 4 It shows Figure 2 Sectional view of AA.

[0028] Figure 5 It shows Figure 3 A cross-sectional view of BB.

[0029] Figure 6 It shows Figure 5 A magnified view of region C in the middle.

[0030] Figure 7 A schematic diagram of the structure of the connecting pipe, clamp, elastic telescopic part, adjustment part and positioning sleeve of the present invention is shown.

[0031] Figure 8 A schematic diagram of the positioning part, tensioning part, and traction rod of the present invention is shown.

[0032] The above-mentioned figures include the following reference numerals: 1. Connecting pipe; 2. Snap-fit ​​unit; 20. Snap-fit ​​connector; 21. Snap-fit ​​sleeve; 3. Angle adjustment unit; 30. Elastic telescopic part; 300. Rotating frame; 301. Sliding rod; 302. Connecting spring; 31. Adjusting part; 310. Positioning frame; 311. Threaded sleeve; 312. Threaded tooth; 4. Tensioning unit; 40. Positioning part; 400. Positioning sleeve; 401. Positioning screw; 41. Tensioning part; 410. Limiting ring; 411. Pressing ring; 412. Sliding block; 413. Pressing arc plate; 414. Sliding groove; 415. Annular protrusion; 42. Traction rod; 421. Insertion hole. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] See Figures 1-3 A connection joint for a heating network pipe includes a connecting pipe 1, wherein the connecting pipe 1 is a flexible hose, and the connecting pipe 1 can be an existing metal corrugated hose, polybutene flexible pipe, aluminum-plastic composite flexible pipe, fluororubber flexible pipe, etc., and is not limited to one type.

[0035] See Figure 1 The connection joint of the heating network pipe also includes two clamping units 2 that are symmetrically connected to both ends of the connecting pipe 1. The clamping unit 2 includes a clamping connector 20 that is fixedly connected to the end of the connecting pipe 1 and used to fit the heating network pipe. The clamping connector 20 has an L-shaped tubular structure and a circular protrusion at the end of the clamping connector 20 near the connecting pipe 1.

[0036] See Figure 1 , Figure 2 and Figure 5 The heating network pipe connection joint also includes an angle adjustment unit 3 connected between two clamping joints 20. The angle adjustment unit 3 includes an elastic telescopic part 30 that is hinged to the two clamping joints 20 respectively. The thermal displacement generated by the heating network pipe is compensated by the shape change of the elastic telescopic part 30. The elastic telescopic part 30 includes a rotating frame 300 hinged to the clamping joint 20. A sliding rod 301 is slidably connected to one end of the rotating frame 300 away from the clamping joint 20. A connecting spring 302 is installed between the sliding rod 301 and the inner end wall of the rotating frame 300.

[0037] See Figure 1 , Figure 2 , Figure 5 and Figure 7 An adjustment part 31 is connected between the two elastic telescopic parts 30. The adjustment part 31 adjusts the distance between the two elastic telescopic parts 30 to change the included angle of the two snap-fit ​​joints 20. The adjustment part 31 includes a positioning frame 310 installed on the outer periphery of any one of the sliding rods 301. A threaded sleeve 311 sleeved on the corresponding sliding rod 301 is rotatably connected inside the positioning frame 310. A threaded tooth 312 is installed on the outer ring surface of the other sliding rod 301. The threaded tooth 312 is threadedly connected to the threaded sleeve 311.

[0038] In actual operation, according to the angle requirements of the installation position, the threaded sleeve 311 is rotated. The threaded sleeve 311 engages with the threaded teeth 312, which drives the two sliding rods 301 to move. The two sliding rods 301 drive the two rotating frames 300 to move through the two connecting springs 302. The two rotating frames 300 rotate on the two snap-fit ​​joints 20 and drive the two snap-fit ​​joints 20 to move towards or away from each other, thereby changing the angle between the two snap-fit ​​joints 20. The rotation of the threaded sleeve 311 is stopped when the included angle between the two snap-fit ​​joints 20 reaches the required angle.

[0039] See Figure 1 , Figure 4 , Figure 6 and Figure 8The connecting joint of the heating network pipe also includes a tensioning unit 4 that is simultaneously installed on the connecting pipe 1 and the two clamping joints 20. The tensioning unit 4 includes a positioning part 40 fixedly installed in the middle of the outer periphery of the connecting pipe 1. The two clamping joints 20 are respectively connected to tensioning parts 41. The tensioning part 41 includes a limiting ring 410 sleeved on the clamping joint 20. Each tensioning part 41 is connected to the positioning part 40 through two traction rods 42.

[0040] See Figure 1 , Figure 4 , Figure 6 and Figure 8 The positioning part 40 includes a positioning sleeve 400 installed in the middle of the outer ring surface of the connecting pipe 1, and positioning screws 401 are threaded to both the front and rear ends of the positioning sleeve 400.

[0041] See Figure 1 , Figure 4 , Figure 6 and Figure 8 The traction rod 42 has multiple evenly distributed insertion holes 421 at one end near the positioning sleeve 400. The insertion holes 421 are inserted and engaged with the positioning screw 401. The traction rods 42 connected to the two clamping rings 411 have the same structure but different sizes. The traction rods 42 on the same side of the two clamping rings 411 are staggered and meet at the positioning sleeve 400.

[0042] In specific operation, during the angle adjustment process of the two clamping joints 20, the positioning sleeve 400 moves synchronously with the clamping joints 20. After the angle adjustment between the two clamping joints 20 is completed, the two traction rods 42 on the front side of the two clamping rings 411 are rotated to the positioning sleeve 400. The corresponding insertion holes 421 on the two traction rods 42 are staggered and coaxially distributed. Then, the positioning screw 401 is inserted through the corresponding insertion holes 421 on the two traction rods 42 and threadedly connected to the positioning sleeve 400 to realize the function of limiting the two traction rods 42. Then, the previous steps are repeated to limit the two traction rods 42 on the rear side of the positioning sleeve 400. Then, the positioning sleeve 400 can be fixed in the working position by existing buckles or bolts and other connecting parts. The four traction rods 42 after being limited limit the two clamping rings 411. At the same time, the four traction rods 42 also limit one rotation direction of the connecting pipe 1, effectively enhancing the strength of the connecting pipe 1 against impact and collision during use.

[0043] See Figure 1 , Figure 4 and Figure 5 The snap-fit ​​unit 2 also includes a snap-fit ​​sleeve 21 that cooperates with the snap-fit ​​connector 20 and is used to press and fix the heating network pipe onto the snap-fit ​​connector 20. This can be an existing sliding connector.

[0044] In practice, after the traction rod 42 is installed, the snap-fit ​​sleeve 21 is first placed on the outer circumference of the heating network pipe. Then, the heating network pipe to be connected is placed on the snap-fit ​​connector 20 and the heating network pipe is pushed so that the end of the heating network pipe is tightly attached to the annular protrusion of the snap-fit ​​connector 20, that is, the end of the heating network pipe is located inside the positioning sleeve 400. Then, the snap-fit ​​sleeve 21 is slidably placed on the snap-fit ​​connector 20 by using a wrench. The snap-fit ​​sleeve 21 presses the heating network pipe onto the snap-fit ​​connector 20 and limits the position of the heating network pipe.

[0045] See Figure 1 , Figure 4 , Figure 6 and Figure 8 Multiple clamping components are slidably connected to the limiting ring 410. Each clamping component includes a sliding block 412 that slides through the limiting ring 410. A clamping arc plate 413 is installed at one end of the sliding block 412 near the axis of the limiting ring 410. An anti-slip pad is laid on the inner arc surface of the clamping arc plate 413. Multiple clamping arc plates 413 form a ring structure. A sliding groove 414 with an isosceles trapezoidal cross section is opened at one end of the sliding block 412 away from the clamping arc plate 413. An anti-detachment rod is installed on the sliding block 412. The anti-detachment rod is located outside the limiting ring 410. The anti-detachment rod can prevent the sliding block 412 from separating from the limiting ring 410. The ends of the multiple clamping components away from the axis of the limiting ring 410 are connected to a clamping ring 411. The clamping ring 411 is hinged to two corresponding traction rods 42.

[0046] See Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 8 The inner ring surface of the clamping ring 411 is provided with an annular protrusion 415 with an isosceles trapezoidal cross section. The annular protrusion 415 cooperates with multiple sliding grooves 414. When the clamping ring 411 moves in any direction along the axis of the limiting ring 410, the annular protrusion 415 squeezes the multiple sliding grooves 414, so that the sliding blocks 412 in the multiple clamping parts are simultaneously subjected to force to drive the multiple clamping arc plates 413 to clamp the end of the heating network pipe, ensuring that the function of clamping the end of the heating network pipe can be achieved even when the heating network pipe generates thermal displacement in different directions.

[0047] In actual operation, the multiple pressing arc plates 413 initially form a ring structure. When the pressing ring 411 is positioned by the traction rod 42, the annular protrusion 415 is located in the middle of the sliding groove 414. The annular protrusion 415 does not squeeze the sliding groove 414. Subsequently, after the heating network pipe is sleeved and connected to the clamping connector 20, the multiple pressing arc plates 413 initially press and limit the end of the heating network pipe through the corresponding anti-slip pads. During heating operation, the heating network pipe will experience thermal displacement due to thermal expansion and contraction. When compensating for thermal displacement, the clamping connector 20 drives the tensioning part 41 to move. Simultaneously, the positioning part 40 adjusts the tensioning part 41 via the traction rod 42 and drives the tensioning part 41 to squeeze the heating network pipe. Specifically, the thermal displacement generated by the heating network pipe is transferred to the clamping connector 20, causing the clamping connector 20 to move. The clamping connector 20, under force, drives the rotating frame 300 to move. The rotating frame 300 moves relative to the sliding rod 301 and stretches or squeezes the connecting spring 302, thereby achieving the function of absorbing and compensating for the thermal displacement of the heating network pipe. This avoids the phenomenon of leakage of the heating medium due to gaps between the heating network pipe and the clamping connector 20, ensuring the proper functioning of the heating network pipe and the clamping connector. The stability of the connection between the heads 20 and the relative sliding range between the rotating frame 300 and the sliding rod 301 can effectively prevent excessive deflection of the clamping joint 20, thereby preventing gaps between the clamping joint 20 and the heating network pipe that could lead to seal failure. This ensures that the clamping joint 20 rotates within a safe range. When the clamping joint 20 rotates, it synchronously drives the limiting ring 410 to rotate. The limiting ring 410 drives multiple sliding blocks 412 to move. Since the positioning sleeve 400 limits the clamping ring 411 through the positioning screw 401 and the traction rod 42, the multiple moving sliding blocks 412... 12 The inclined surface of the sliding groove 414 and the inclined surface of the annular protrusion 415 cooperate with each other. The annular protrusion 415 squeezes multiple sliding blocks 412. The multiple sliding blocks 412 are driven by force to move multiple pressing arc plates 413 towards the end of the heating network pipe. The multiple pressing arc plates 413 further press and limit the end of the heating network pipe through the anti-slip pad. While compensating for thermal displacement, it effectively increases the connection strength between the clamping connector 20 and the heating network pipe, avoids gaps or detachment between the clamping connector 20 and the heating network pipe, and thus ensures the stability of the heating operation.

[0048] It should be noted that existing heating network pipe connection joints also have different angles. Only the corresponding angled connection joint needs to be connected to the heating network pipe. However, this type of connection joint is only suitable for connecting the heating network pipe when the laying path has been planned. It cannot be used to connect building risers with large vertical deviations during the renovation of old residential areas, nor can it tolerate pipe prefabrication errors or on-site installation angle deviations. In the present invention, simply rotating the threaded sleeve 311 allows for angle adjustment between the two clamping joints 20, making it suitable for different scenarios in actual installation and effectively improving the practicality of the connection joint. The angle adjustment unit 3 and tensioning unit 4 used are both conventional and ordinary mechanical structural components, without any high-cost precision parts. In summary, the above technical solution of the present invention is a specific improvement based entirely on the existing technical situation and to solve technical problems.

[0049] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A connecting joint for a heating network pipe, characterized in that, include: A connecting pipe, wherein the connecting pipe is a flexible hose; The snap-fit ​​unit has two symmetrically connected to both ends of the connecting pipe. The snap-fit ​​unit includes a snap-fit ​​connector connected to the end of the connecting pipe and used for fitting the heating network pipe. An angle adjustment unit is connected between two snap-fit ​​connectors. The angle adjustment unit includes elastic telescopic parts that are respectively hinged to the two snap-fit ​​connectors. The thermal displacement generated by the heating network pipe is compensated by the change in shape of the elastic telescopic parts. An adjustment part is connected between the two elastic telescopic parts to adjust the distance between the two elastic telescopic parts so as to change the included angle of the two snap-fit ​​connectors. A tensioning unit is simultaneously installed on the connecting pipe and two clamping joints. The tensioning unit includes a positioning part fixedly installed in the middle of the outer periphery of the connecting pipe, and tensioning parts are respectively connected to the two clamping joints. Each tensioning part is connected to the positioning part through two traction rods. During thermal displacement compensation, the clamping joints drive the tensioning part to move, and the positioning part adjusts the tensioning part through the traction rods and drives the tensioning part to squeeze the heating network pipe. The tensioning part includes a limiting ring sleeved on the snap connector. Multiple clamping components are slidably connected to the limiting ring. The ends of the multiple clamping components away from the axis of the limiting ring are connected to the clamping ring. The clamping ring is hinged to two corresponding traction rods. The clamping component includes a sliding block that slides through the limiting ring, and a sliding groove with an isosceles trapezoidal cross-section is opened at the end of the sliding block away from the clamping arc plate. The inner ring surface of the clamping ring is provided with an annular protrusion with an isosceles trapezoidal cross section, and the annular protrusion cooperates with multiple sliding grooves.

2. The connecting joint for a heating network pipe according to claim 1, characterized in that: The snap-fit ​​unit also includes a snap-fit ​​sleeve that mates with the snap-fit ​​connector and is used to press and fix the heating network pipe onto the snap-fit ​​connector.

3. The connecting joint for a heating network pipe according to claim 1, characterized in that: The elastic telescopic part includes a rotating frame hinged to the snap-fit ​​connector, a sliding rod slidably connected to the end of the rotating frame away from the snap-fit ​​connector, and a connecting spring installed between the sliding rod and the inner end wall of the rotating frame.

4. A connecting joint for a heating network pipe according to claim 3, characterized in that: The adjustment unit includes a positioning frame installed on the outer periphery of any one of the sliding rods. A threaded sleeve fitted on the corresponding sliding rod is rotatably connected inside the positioning frame. Threaded teeth are installed on the outer ring surface of the other sliding rod, and the threaded teeth are threadedly connected to the threaded sleeve.

5. A connecting joint for a heating network pipe according to claim 1, characterized in that: The positioning part includes a positioning sleeve installed in the middle of the outer annular surface of the connecting pipe, and positioning screws are threaded to both the front and rear ends of the positioning sleeve.

6. A connecting joint for a heating network pipe according to claim 1, characterized in that: A clamping arc plate is installed at one end of the sliding block near the axis of the limiting ring.

7. A connecting joint for a heating network pipe according to claim 6, characterized in that: When the clamping ring moves in any direction along the axis of the limiting ring, the annular protrusions squeeze multiple sliding grooves, causing multiple clamping components to simultaneously press the end of the heating network pipe.

8. A connecting joint for a heating network pipe according to claim 5, characterized in that: The traction rod has multiple evenly distributed insertion holes at one end near the positioning sleeve, which are engaged with the positioning screw.

9. A connecting joint for a heating network pipe according to claim 5, characterized in that: The traction rods connected to the two clamping rings have the same structure but different sizes. The traction rods on the same side of the two clamping rings are staggered and meet at the positioning sleeve.

10. A connecting joint for a heating network pipe according to claim 6, characterized in that: An anti-detachment rod is installed on the sliding block, and the anti-detachment rod is located outside the limiting ring.

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