Pipeline butt joint device for fire engineering construction

Abstract

The utility model discloses a pipeline butt joint device for fire-fighting engineering construction, which is used for connecting two fire-fighting pipelines and comprises a sealing cover and two connecting components, the sealing cover is sleeved at the joint of the two fire-fighting pipelines, each connecting component comprises a sliding part and at least two abutting parts, the two sliding parts are respectively sleeved on the two fire-fighting pipelines in a sliding manner, and the abutting parts are connected with the sealing cover. A sliding gap allowing the end of the sealing cover to pass through is formed between the sliding part and the circumferential outer wall of the fire-fighting pipeline, and the at least two abutting parts are slidably connected to the sliding part in the radial direction of the fire-fighting pipeline and can abut against the end of the sealing cover so as to limit sliding of the sealing cover relative to the fire-fighting pipeline. According to the utility model, the problems of unstable connection and insufficient sealing performance of the combination of two box bodies due to the lack of an adjustable protection structure and a positioning structure between the combination of the two box bodies can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of fire protection engineering construction technology, specifically to a pipe connection device for fire protection engineering construction. Background Technology

[0002] To avoid the problem of bolts being difficult to disassemble due to easy corrosion caused by exposed bolts, research on related applications has emerged.

[0003] For example, Chinese utility model patent CN213929836U, entitled "A Novel Fire Pipeline Connection Structure," includes a pipeline. This novel fire pipeline connection structure involves fitting a first mounting box around one end of the pipeline and a second mounting box around the other end. Four equally spaced sliders and grooves are provided at one end of the first mounting box, and four equally spaced sliders and grooves are provided on the side of the second mounting box near the first mounting box. A groove is formed on one side wall of the groove to prevent bolts from being exposed and corroding. The device uses rubber sealing gaskets on the flange sides and on opposite sides of the first and second mounting boxes; the rubber gaskets deform under pressure, increasing the airtightness between the two pipelines. However, this structure uses two boxes for enclosure and lacks adjustable protective and positioning structures, resulting in unstable connections and insufficient sealing.

[0004] Therefore, there is an urgent need for a pipe connection device for fire protection engineering construction to solve the problem that the existing technology, which uses two box combinations, lacks an adjustable protective structure and positioning structure, resulting in unstable connection and insufficient sealing between the two box combinations. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a pipe connection device for fire protection engineering construction, which solves the technical problem in the prior art that the connection between the two box combinations is unstable and the sealing is insufficient due to the lack of an adjustable protective structure and positioning structure between the two box combinations.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a pipe connection device for fire protection engineering construction, used to connect two fire protection pipes, including:

[0008] A sealing cover is fitted over the connection between the two fire-fighting pipes; and

[0009] Two connecting components, each including a sliding member and at least two abutting portions, wherein the two sliding members are respectively slidably fitted onto the two fire-fighting pipes, and a sliding gap is formed between the sliding member and the circumferential outer wall of the fire-fighting pipe to allow the end of the sealing cover to pass through; and the at least two abutting portions are respectively slidably connected to the sliding member along the radial direction of the fire-fighting pipe and are capable of abutting against the end of the sealing cover to restrict the sliding of the sealing cover relative to the fire-fighting pipe.

[0010] In some embodiments, the sealing cover is flexible, the sealing cover is cylindrical and open at both ends, and both ends of the sealing cover can pass through the sliding gap respectively.

[0011] In some embodiments, the sliding member includes a sliding ring, which is slidably sleeved on the fire-fighting pipe, and the sliding gap is formed between the inner circumferential wall of the sliding ring and the outer circumferential wall of the fire-fighting pipe. The sliding ring has at least two first grooves relative to the outer circumferential wall of the fire-fighting pipe. One end of the abutting part is disposed relative to the outer circumferential wall of the fire-fighting pipe, and the other end is slidably embedded in the first groove. The abutting part slides along the guide of the first groove so that one end of the abutting part abuts against the outer circumferential wall of the fire-fighting pipe.

[0012] In some embodiments, the sliding member further includes at least two movable parts, which are arranged one-to-one with the abutment parts and are slidably connected to the sliding ring along the axial direction of the fire-fighting pipe. The movable parts slide close to the sealing cover along the axial direction of the fire-fighting pipe, and can abut against the other end of the abutment part, and push the abutment part to slide relative to the sliding ring.

[0013] In some embodiments, the other end of the abutting portion has a wedge-shaped surface relative to the movable portion, and the cross-sectional area of ​​the other end of the abutting portion gradually decreases along the direction away from the fire-fighting pipe.

[0014] In some embodiments, the sliding ring has at least two second sliding grooves along the axial direction of the fire-fighting pipeline relative to the first sliding groove. The second sliding grooves penetrate the outer wall of the sliding ring and communicate with the first sliding groove. The movable part is slidably embedded in the second sliding groove and can abut against the abutting part. The movable part slides in a direction close to the sealing cover and can push one end of the abutting part to abut against the circumferential outer wall of the fire-fighting pipeline.

[0015] In some embodiments, the sliding ring is provided with at least two third sliding grooves along the axial direction of the fire-fighting pipe. The third sliding grooves are provided in a one-to-one correspondence with the second sliding grooves and are connected to the second sliding grooves. The third sliding grooves and the second sliding grooves together form a guide groove. The cross-section of the guide groove is "+" shaped, and the cross-section of the movable part is set to match the cross-section of the guide groove.

[0016] In some embodiments, the number of abutting portions in the connecting assembly is multiple, and the multiple abutting portions are spaced apart along the circumferential direction of the fire-fighting pipe and are all slidably connected to the sliding ring. The sliding member also includes a locking ring, which is sleeved on the sliding ring. The locking ring can slide relative to the sliding ring and lock with the sliding ring. After sliding along the direction close to the sealing cover, the locking ring can abut against the multiple movable portions and push the multiple abutting portions closer to the sealing cover to slide.

[0017] In some embodiments, the outer circumferential wall of the sliding ring is provided with an external thread, the inner circumferential wall of the locking ring is provided with an internal thread, and the locking ring is threadedly connected to the sliding ring.

[0018] In some embodiments, the abutting portion has at least one spherical groove on the inner wall of the first slide groove, and the connecting assembly further includes at least two rolling portions, each of which is corresponding to one of the spherical grooves. The rolling portions are rotatably housed within the spherical grooves and abut against the inner wall of the first slide groove.

[0019] Compared with the prior art, the beneficial effects of the pipe connection device for fire protection engineering construction provided by this utility model include: a sealing cover is fitted onto the connection of two fire protection pipes; two sliding members are respectively slidably fitted onto the two fire protection pipes, and a sliding gap is formed between each of the two circumferential outer walls, allowing the ends of the sealing cover to pass through; at least two abutting parts are respectively slidably connected along the radial direction of the fire protection pipes and abut against the sealing cover. Compared with the prior art, by fitting the sealing cover onto the connection of the two fire protection pipes, the connection of the two fire protection pipes is wrapped to prevent the flange bolts at the connection of the two fire protection pipes from being corroded. At the same time, the two ends of the sealing cover pass through the sliding gap and abut against the ends of the sealing cover using the abutting parts on the sliding members, so that the two ends of the sealing cover are respectively locked onto the fire protection pipes, preventing the sealing cover from sliding relative to the fire protection pipes, improving the stability of the sealing cover after installation, and solving the problem in the prior art that the connection of the two box combinations is unstable and the sealing is insufficient due to the lack of an adjustable protective structure and positioning structure between the two box combinations. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural schematic diagram of a pipe connection device for fire protection engineering construction provided by an embodiment of the present utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of two connecting components connected to two fire-fighting pipes according to an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional structural schematic diagram of a pipe connection device for fire protection engineering construction provided by an embodiment of the present utility model;

[0023] Figure 4 It is along Figure 3 Enlarged view of point A in the middle:

[0024] Figure 5 This is a cross-sectional structural diagram of the active part provided in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] Fire-fighting pipe 1; sealing cover 2; connecting assembly 3; sliding part 31; sliding ring 311; moving part 312; locking ring 313; wedge surface 314; abutting part 32; sliding gap 33; rolling part 34. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] To address the technical problem of unstable connection and insufficient sealing between two assembled fire-fighting pipes due to the lack of adjustable protective and positioning structures, this invention provides a pipe connection device for fire-fighting engineering construction. This device encloses the connection of two fire-fighting pipes 1 with a sealing cover 2, preventing corrosion of the flange bolts at the connection. Simultaneously, both ends of the sealing cover 2 pass through a sliding gap 33 and abut against the ends of the sealing cover 2 using the abutment portion 32 on the sliding member 31. This locks both ends of the sealing cover 2 onto the fire-fighting pipe 1, preventing the sealing cover 2 from sliding relative to the fire-fighting pipe 1 and improving the stability of the sealing cover 2 after installation.

[0029] It should be noted that the pipe connection device for fire protection engineering construction described in this utility model is used in, but not limited to, the field of fire protection engineering construction technology. For ease of explanation, this utility model only uses the application of the pipe connection device for fire protection engineering construction technology as an example for explanation. The principle of the pipe connection device for fire protection engineering construction applied to other types of equipment is essentially the same as the principle applied to the field of fire protection engineering construction technology, and will not be described in detail here.

[0030] Please see Figure 1 , Figure 3 , Figure 1 , Figure 2 This is a schematic diagram of the structure of a pipe connection device for fire protection engineering construction in one embodiment of the present invention. The pipe connection device for fire protection engineering construction is used to connect two fire protection pipes 1, including: a sealing cover 2 and two connecting components 3. The sealing cover 2 is sleeved at the connection of the two fire protection pipes 1. The connecting components 3 include a sliding member 31 and at least two abutting parts 32. The two sliding members 31 are respectively slidably sleeved on the two fire protection pipes 1. A sliding gap 33 is formed between the sliding member 31 and the circumferential outer wall of the fire protection pipe 1, allowing the end of the sealing cover 2 to pass through. The at least two abutting parts 32 are respectively slidably connected to the sliding member 31 along the radial direction of the fire protection pipe 1, and can abut against the end of the sealing cover 2 to restrict the sliding of the sealing cover 2 relative to the fire protection pipe 1.

[0031] In this device, the sealing cover 2 is fitted at the connection of the two fire pipes 1, and the two sliding parts 31 are respectively slidably fitted on the two fire pipes 1, and a sliding gap 33 is formed between them and the outer circumferential walls of the two pipes, allowing the end of the sealing cover 2 to pass through. At least two abutting parts 32 are respectively slidably connected along the radial direction of the fire pipes 1 and abut against the sealing cover 2.

[0032] Compared to existing technologies, by placing the sealing cover 2 over the connection of the two fire pipes 1, the connection of the two fire pipes 1 is wrapped to prevent the flange bolts at the connection of the two fire pipes 1 from being corroded. At the same time, the two ends of the sealing cover 2 pass through the sliding gap 33 respectively, and the abutting part 32 on the sliding member 31 abuts against the ends of the sealing cover 2, so that the two ends of the sealing cover 2 are locked onto the fire pipe 1 respectively, preventing the sealing cover 2 from sliding relative to the fire pipe 1, improving the stability of the sealing cover 2 after installation. This can solve the problem in existing technologies where the lack of an adjustable protective structure and positioning structure between the two box combinations leads to unstable connection and insufficient sealing of the two box combinations.

[0033] Furthermore, such as Figure 2As shown, in the prior art, when two sections of fire-fighting pipe 1 are joined, they are mostly connected by flanges, sealing rings and bolts. The sealing cover 2 is placed on the two flanges to protect the connection between the two fire-fighting pipes 1. This avoids the problem that the bolts are easily corroded due to long-term exposure to humid air, which makes bolt disassembly more difficult. The connection method of flanges, sealing rings and bolts is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0034] In this embodiment, the sealing cover 2 is flexible, cylindrical, and open at both ends, with both ends of the sealing cover 2 able to pass through the sliding gap 33 respectively.

[0035] The sealing cover 2 is flexible and can be extended and stretched according to the protruding edge of the flange. Specifically, the volume of the middle part of the sealing cover 2 is larger than the volume of the two ends of the sealing cover 2, so that its appearance fits the connection structure of the two sections of fire pipe 1 better.

[0036] Furthermore, the sealing cover 2 here is a common and readily available device on the market, and is a conventional setting known to those skilled in the art, so it will not be described in detail here.

[0037] In this embodiment, as Figures 2 to 4 As shown, the slider 31 includes a sliding ring 311, at least two movable parts 312, and a locking ring 313.

[0038] The sliding ring 311 is slidably sleeved on the fire pipe 1, and the inner circumferential wall of the sliding ring 311 and the outer circumferential wall of the fire pipe 1 form a sliding gap 33. The sliding ring 311 has at least two first grooves relative to the outer circumferential wall of the fire pipe 1. One end of the abutting part 32 is disposed relative to the outer circumferential wall of the fire pipe 1, and the other end is slidably embedded in the first groove. The abutting part 32 slides along the guide of the first groove so that one end of the abutting part 32 abuts against the outer circumferential wall of the fire pipe 1.

[0039] The sliding ring 311 is used to connect and support at least two abutting parts 32, and the first groove guides the sliding of the abutting parts 32 relative to the sliding ring 311.

[0040] In one embodiment, Figure 4 As shown, the abutting part 32 has at least one spherical groove on the inner wall of the first slide groove. The connecting component 3 also includes at least two rolling parts 34, which are arranged in a one-to-one correspondence with the spherical grooves. The rolling parts 34 are rotatably housed in the spherical grooves and abut against the inner wall of the first slide groove.

[0041] The rolling part 34 is disposed between the abutting part 32 and the inner wall of the first groove to reduce the sliding friction when the abutting part 32 slides relative to the inner wall of the first groove.

[0042] Furthermore, the rolling part 34 here is a steel ball that is common and readily available in the market. This is a conventional setting known to those skilled in the art, and will not be described in detail here.

[0043] In one embodiment, Figure 3 , Figure 4 As shown, the movable part 312 and the abutting part 32 are provided in a one-to-one correspondence and are slidably connected to the sliding ring 311 along the axial direction of the fire pipe 1. The movable part 312 slides close to the sealing cover 2 along the axial direction of the fire pipe 1 and can abut against the other end of the abutting part 32, and push the abutting part 32 to slide relative to the sliding ring 311.

[0044] The movable part 312 drives the sliding of the contact part 32 relative to the inner wall of the first chute close to the fire pipe 1.

[0045] In one embodiment, Figure 4 As shown, the other end of the abutting part 32 has a wedge-shaped surface 314 formed relative to the movable part 312, and the cross-sectional area of ​​the other end of the abutting part 32 gradually decreases along the direction away from the fire pipe 1.

[0046] Specifically, the sliding direction of the movable part 312 is perpendicular to the sliding direction of the abutting part 32. By setting the wedge-shaped surface 314, the sliding of the movable part 312 can be smoothly transmitted to the abutting part 32, and the abutting part 32 can be smoothly slid relative to the first groove.

[0047] In one embodiment, Figure 4 As shown, the sliding ring 311 has at least two second sliding grooves along the axial direction of the fire pipe 1 relative to the first sliding groove. The second sliding grooves penetrate the outer wall of the sliding ring 311 and are connected to the first sliding groove. The movable part 312 is slidably embedded in the second sliding groove and can abut against the abutting part 32. The movable part 312 slides in the direction close to the sealing cover 2 and can push one end of the abutting part 32 to abut against the circumferential outer wall of the fire pipe 1.

[0048] The second groove serves to connect and guide the sliding of the movable part 312 relative to the sliding ring 311.

[0049] In one embodiment, Figure 4 , Figure 5 As shown, the sliding ring 311 has at least two third sliding grooves along the axial direction of the fire pipe 1. The third sliding grooves are arranged in a one-to-one correspondence with the second sliding grooves and are connected to the second sliding grooves. The third sliding grooves and the second sliding grooves together form a guide groove. The cross-section of the guide groove is "+" shaped. The cross-section of the movable part 312 is set to match the cross-section of the guide groove.

[0050] The third and second chutes together form a guide groove with a cross-section in the shape of a cross, which can prevent the moving part 312 from separating from the second chutes during the sliding process and can increase the stability of the abutment part 32 in connecting the sealing cover 2 to the fire pipe 1.

[0051] In one embodiment, Figure 1 , Figure 2 As shown, the connecting assembly 3 has multiple abutment parts 32, which are spaced apart along the circumference of the fire pipe 1 and are all slidably connected to the sliding ring 311. The locking ring 313 is sleeved on the sliding ring 311. The locking ring 313 can slide relative to the sliding ring 311 and lock with the sliding ring 311. After the locking ring 313 slides in the direction close to the sealing cover 2, it can abut against multiple movable parts 312 and push the multiple abutment parts 32 to slide closer to the sealing cover 2.

[0052] Multiple contact parts 32 are spaced apart along the circumference of the fire pipe 1, which can increase the stability of the contact parts 32 in connecting the sealing cover 2 to the fire pipe 1.

[0053] Furthermore, by providing a locking ring 313 that can slide relative to the sliding ring 311 and engage with the sliding ring 311, after the locking ring 313 slides in the direction close to the sealing cover 2, it can push multiple movable parts 312 to abut against each other, thereby pushing multiple abutting parts 32 to slide close to the sealing cover 2.

[0054] In one embodiment, Figure 2 , Figure 4 As shown, the outer circumferential wall of the sliding ring 311 is provided with external threads, and the inner circumferential wall of the locking ring 313 is provided with internal threads. The locking ring 313 is threadedly connected to the sliding ring 311.

[0055] Specifically, the locking ring 313 and the sliding ring 311 are connected by threads and can achieve locking.

[0056] Furthermore, as the locking ring 313 is continuously tightened, it can simultaneously push multiple movable parts 312 to slide along the direction close to the sealing cover 2 until multiple abutting parts 32 are pushed to abut against the sealing cover 2 and the fire pipe 1 respectively, thereby achieving interlocking and increasing the stability of the connection.

[0057] To better understand this utility model, the following is combined with... Figures 1 to 5 The technical solution of this utility model is described in detail below:

[0058] A sealing cover 2 is fitted onto the connection of two fire-fighting pipes 1. Two sliding members 31 are slidably fitted onto the two fire-fighting pipes 1 respectively, and a sliding gap 33 is formed between each of the two pipes and their circumferential outer walls, allowing the ends of the sealing cover 2 to pass through. At least two abutting portions 32 are slidably connected along the radial direction of the fire-fighting pipes 1 and abut against the sealing cover 2. Compared with the prior art, by covering the connection of the two fire-fighting pipes 1 with the sealing cover 2, the connection of the two fire-fighting pipes 1 is wrapped to prevent the flange bolts at the connection of the two fire-fighting pipes 1 from being corroded. At the same time, the two ends of the sealing cover 2 pass through the sliding gap 33 respectively, and the abutting portions 32 on the sliding members 31 abut against the ends of the sealing cover 2, so that the two ends of the sealing cover 2 are locked onto the fire-fighting pipes 1 respectively, preventing the sealing cover 2 from sliding relative to the fire-fighting pipes 1 and improving the stability of the sealing cover 2 after installation.

[0059] In the specific working process of this utility model, the user first uses connecting flanges and bolts to connect two sections of fire-fighting pipe 1. Then, the sealing cover 2 is placed on the connecting flange of the two fire-fighting pipes 1, and the sliding ring 311 is slid so that both ends of the sealing cover 2 pass through the sliding gap 33 respectively. Then, the user adjusts the edge of the end of the sealing cover 2 so that it is beyond the edge of the sliding ring 311. Finally, the user tightens the locking ring 313. During the continuous tightening process, the locking ring 313 can simultaneously push multiple movable parts 312 to slide in the direction close to the sealing cover 2, and drive multiple abutting parts 32 to abut against the end of the sealing cover 2, so that the sealing cover 2 cannot slide relative to the fire-fighting pipe 1. It is not only simple in structure, but also convenient to install and disassemble.

[0060] This device, through the aforementioned structure, can solve the problem in the prior art where the connection between the two box combinations is unstable and the sealing is insufficient due to the lack of an adjustable protective and positioning structure between the two box combinations.

[0061] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A pipe connection device for fire protection engineering construction, used to connect two fire protection pipes, characterized in that, include: A sealing cover is fitted over the connection between the two fire-fighting pipes; as well as Two connecting components, each including a sliding member and at least two abutting portions, wherein the two sliding members are respectively slidably fitted onto the two fire-fighting pipes, and a sliding gap is formed between the sliding member and the circumferential outer wall of the fire-fighting pipe to allow the end of the sealing cover to pass through; and the at least two abutting portions are respectively slidably connected to the sliding member along the radial direction of the fire-fighting pipe and are capable of abutting against the end of the sealing cover to restrict the sliding of the sealing cover relative to the fire-fighting pipe.

2. The pipe connection device for fire protection engineering construction according to claim 1, characterized in that, The sealing cover is flexible, cylindrical, and open at both ends, with each end of the sealing cover able to pass through the sliding gap.

3. The pipe connection device for fire protection engineering construction according to claim 2, characterized in that, The sliding member includes a sliding ring, which is slidably sleeved on the fire-fighting pipeline. The sliding gap is formed by the inner circumferential wall of the sliding ring and the outer circumferential wall of the fire-fighting pipeline. The sliding ring has at least two first sliding grooves relative to the outer circumferential wall of the fire-fighting pipeline. One end of the abutting part is disposed relative to the outer circumferential wall of the fire-fighting pipeline, and the other end is slidably embedded in the first sliding groove. The abutting part slides along the guide of the first sliding groove so that one end of the abutting part abuts against the outer circumferential wall of the fire-fighting pipeline.

4. The pipe connection device for fire protection engineering construction according to claim 3, characterized in that, The sliding member further includes at least two movable parts, which are arranged one-to-one with the abutting parts and are slidably connected to the sliding ring along the axial direction of the fire-fighting pipe. The movable parts slide close to the sealing cover along the axial direction of the fire-fighting pipe, and can abut against the other end of the abutting part, and push the abutting part to slide relative to the sliding ring.

5. The pipe connection device for fire protection engineering construction according to claim 4, characterized in that, The other end of the abutting part has a wedge-shaped surface relative to the movable part, and the cross-sectional area of ​​the other end of the abutting part gradually decreases along the direction away from the fire pipe.

6. The pipe connection device for fire protection engineering construction according to claim 5, characterized in that, The sliding ring has at least two second sliding grooves along the axial direction of the fire-fighting pipeline, which are opposite to the first sliding groove. The second sliding grooves penetrate the outer wall of the sliding ring and are connected to the first sliding groove. The movable part is slidably embedded in the second sliding groove and can abut against the abutting part. The movable part slides in the direction close to the sealing cover and can push one end of the abutting part to abut against the circumferential outer wall of the fire-fighting pipeline.

7. The pipe connection device for fire protection engineering construction according to claim 6, characterized in that, The sliding ring has at least two third sliding grooves along the axial direction of the fire-fighting pipe. The third sliding grooves are arranged in a one-to-one correspondence with the second sliding grooves and are connected to the second sliding grooves. The third sliding grooves and the second sliding grooves together form a guide groove. The cross-section of the guide groove is "+" shaped, and the cross-section of the movable part is set to match the cross-section of the guide groove.

8. The pipe connection device for fire protection engineering construction according to claim 7, characterized in that, The connecting assembly has multiple abutment portions, which are spaced apart along the circumference of the fire-fighting pipe and slidably connected to the sliding ring. The sliding component also includes a locking ring, which is sleeved on the sliding ring. The locking ring can slide relative to the sliding ring and lock with the sliding ring. After sliding along the direction close to the sealing cover, the locking ring can abut against multiple movable portions and push the multiple abutment portions closer to the sealing cover.

9. The pipe connection device for fire protection engineering construction according to claim 8, characterized in that, The sliding ring has an external thread on its outer circumferential wall, and the locking ring has an internal thread on its inner circumferential wall. The locking ring is threadedly connected to the sliding ring.

10. The pipe connection device for fire protection engineering construction according to claim 3, characterized in that, The abutting part has at least one spherical groove on the inner wall of the first slide groove. The connecting assembly also includes at least two rolling parts, each of which is arranged in a one-to-one correspondence with the spherical groove. The rolling parts are rotatably housed within the spherical groove and abut against the inner wall of the first slide groove.

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