A municipal engineering drainage pipeline support connecting structure
By using a combination of multi-layer flexible sleeves and liquid shaped fillers in the drainage pipe connection, the problems of environmental adaptability and installation difficulty are solved, achieving stable connection and timely maintenance, and reducing damage caused by water flow impact.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGDAO MUNICIPAL CONSTR GRP CO LTD
- Filing Date
- 2023-06-07
- Publication Date
- 2026-05-08
AI Technical Summary
Existing drainage pipe connection devices are inadequate in terms of environmental adaptability and installation difficulty, and are easily damaged by water flow impact, making it difficult to detect water leakage.
A multi-layer flexible sleeve that can be filled with shaped filler is set between a pair of installation pipes. The flexible sleeve adapts to the pipeline environment through its bendability, and the state is simulated by filling with water. A solidifiable liquid shaped filler is injected to form a high-strength solid structure, and the internal condition is monitored by a water level sensor.
It achieves a high degree of environmental adaptability and stable resistance to water flow impact, with more stable connections, and timely detection of internal damage through visual and sensor monitoring to reduce losses.
Smart Images

Figure CN116537339B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of municipal engineering, and in particular to a drainage pipe support connection structure for municipal engineering. Background Technology
[0002] Municipal engineering refers to the construction of municipal infrastructure, such as common urban roads, bridges, subways, underground pipelines, tunnels, waterways, rail transit, sewage treatment, and garbage disposal. Among these, drainage is a particularly important function of a city. Drainage pipes refer to the system of pipes and channels that collect and discharge sewage, wastewater, and rainwater, as well as their ancillary facilities. This includes main pipes, branch pipes, and pipes leading to treatment plants. Most drainage pipes are installed underground.
[0003] When installing drainage pipes, connecting devices are necessary to connect adjacent pipes. However, due to the complex environment in which pipes are laid, the interfaces of adjacent pipes may not be oriented in a relatively opposite direction, but rather at an angle. In this case, flexible hose fittings or rigid bend fittings that match the pipe positions are required to adapt to the connection. However, flexible hose fittings have low strength and are easily damaged under the impact of water flow, while rigid bend fittings have limited adaptability to the installation environment, making them difficult to match and install. Furthermore, the water flow impact force at the bend connection between pipes is relatively large, and it is difficult to detect leaks caused by joint damage, which can easily pollute the underground environment. Summary of the Invention
[0004] The purpose of this application is to solve the problems of poor environmental adaptability and high installation difficulty of existing drainage pipe connection devices. Compared with the prior art, it provides a drainage pipe support connection structure for municipal engineering, including a pair of installation pipes. Each of the two installation pipes has a spacer ring fixedly connected to one end of each other. A multi-layer flexible sleeve is fixedly connected between the two spacer rings. The interior of each pair of installation pipes is provided with a main sealing plate and a secondary sealing plate. The upper and lower ends of the main sealing plate and the secondary sealing plate are fixedly connected with rotating rods. The rotating rods movably penetrate the inner wall of the installation pipe and extend to the outside. The outer end of the installation pipe is fixedly connected with a pair of fixed rods corresponding to the rotating rods. A fastening component is threaded between the rotating rods and the fixed rods. The upper ends of the two spacer rings are fixedly connected with a material injection pipe and a liquid injection pipe, respectively. The lower end of the spacer ring with the liquid injection pipe is fixedly connected with a drain pipe. The material injection pipe, the liquid injection pipe and the drain pipe all penetrate the spacer ring and communicate with the interior of the multi-layer flexible sleeve. The lower end of one of the installation pipes is fixedly connected with a water injection pipe that communicates with it. The water injection pipe is located between the rotating rod and the spacer ring.
[0005] By setting a multi-layer flexible sleeve that can be filled with shaped filler between a pair of installation pipes, the flexible sleeve itself can freely adapt to the installation environment of the pipeline, realizing the connection between a pair of non-linearly distributed pipelines. Then, by filling with water, the state of the multi-layer flexible sleeve during the drainage process is simulated and revealed. Then, a solidifiable liquid shaped filler is injected into the revealed multi-layer flexible sleeve, and after it forms a high-strength solid structure, the multi-layer flexible sleeve is shaped. This makes the application highly adaptable to the environment and also has a stable ability to withstand the impact of water flow, making the connection between the installation pipe and the pipeline more stable.
[0006] Optionally, the sides of both the main sealing plate and the secondary sealing plate are curved surfaces, and the outer diameter of the curved surface is the same as the inner diameter of the mounting tube.
[0007] Optionally, the multi-layer flexible sleeve includes an outer sleeve, a middle sleeve, and an inner sleeve distributed sequentially from the outside to the inside, with each end of the three sleeves fixedly connected to a pair of spacer rings. A buffer material is filled between the outer sleeve and the middle sleeve, and an inner measuring ring is provided between the middle sleeve and the inner sleeve.
[0008] Optionally, the inner test ring includes multiple hollow mesh rings and multiple mesh sleeves, with the hollow mesh rings and mesh sleeves distributed at intervals and fixedly connected to each other, and the number of both is the same.
[0009] Optionally, the mesh sleeve away from the injection pipe is fixedly connected to the spacer ring, and the ends of both the injection pipe and the discharge pipe are located inside the opening end of the mesh sleeve.
[0010] Optionally, the outer surfaces of both the hollow mesh ring and the mesh sleeve are bonded with a water-soluble film, and the end of the injection pipe is located between the intermediate sleeve and the inner sleeve.
[0011] Optionally, a water level sensor is installed on the inner wall of the injection tube near the inner ring.
[0012] Optionally, the rotating rod has two mutually perpendicular screw holes, namely screw hole one and screw hole two, and the fixed rod has a pair of mutually parallel screw holes, namely screw hole one and screw hole two, which are located on the same horizontal plane as the pair of screw holes three.
[0013] Optionally, the fastening components include matching bolts and nuts, with screw holes one, two, and three all matching the bolts.
[0014] A drainage pipe support and connection structure for municipal engineering, the method of its use is as follows:
[0015] S1, Basic Connection: Connect a pair of installation pipes to the ports of a pair of pipes respectively to achieve communication between the pair of pipes;
[0016] S2, Shaping Operation:
[0017] S2-1. Rotate the main sealing plate and the auxiliary sealing plate so that their side arc surfaces fit against the inner wall of the installation pipe to seal the installation pipe;
[0018] S2-2. Fill the inside of the injection pipe and the multi-layer flexible sleeve with sufficient water through the water injection pipe, and simulate and reveal the state of the multi-layer flexible sleeve during the drainage process.
[0019] S2-3. Seal the drain pipe port, and then fill the inner ring with liquid phase change filler through the injection pipe. After filling, cool and solidify.
[0020] S2-4. Fill the space between the intermediate sleeve and the inner sleeve with liquid shaping filler through the injection pipe, and dry and cure it to shape the multi-layer flexible sleeve into its state during drainage.
[0021] S3. Visual inspection procedure:
[0022] S3-1. The liquid phase-changing packing is heated and softened, and then discharged through the drain pipe;
[0023] S3-2. Seal the port of the drain pipe again, inject sufficient water into the inner ring through the injection pipe, and then seal the injection pipe.
[0024] S3-3. When the water volume decreases sharply after opening the injection pipe, it indicates that the shaped packing material has internal cracks.
[0025] Compared to existing technologies, the advantages of this application are:
[0026] (1) This application sets a multi-layer flexible sleeve that can be filled with shaped filler between a pair of installation pipes. First, the flexible sleeve itself can freely adapt to the installation environment of the pipeline through its own bendability, so as to realize the connection between a pair of non-linear distributed pipelines. Then, by filling with water, the state of the multi-layer flexible sleeve during the drainage process is simulated and revealed. Then, solidifiable liquid shaped filler is injected into the revealed multi-layer flexible sleeve. After it forms a high-strength solid structure, the multi-layer flexible sleeve is shaped. This application has high adaptability to the environment and stable bearing capacity against water flow impact, so that the connection between the installation pipe and the pipeline is more stable.
[0027] (2) When the solid shaped packing is internally broken under the impact of water flow for a long time, the water inside the inner ring will enter the crack, which will reduce the water inside the inner ring and significantly lower the water level in the injection tube. Thus, visual observation can reflect whether the shaped packing is internally broken to a certain extent, which makes it convenient to disassemble and replace the application in time and avoids greater losses.
[0028] (4) To improve the timeliness and convenience of judgment, a water level sensor can be selectively installed on the inner wall of the injection tube near the inner ring. The water level sensor can monitor the changes in the liquid level in the injection tube in a timely and effective manner, eliminating the timeliness and inconvenience of manual visual inspection. Attached Figure Description
[0029] Figure 1 For the three-dimensional representation of this application Figure 1 ;
[0030] Figure 2 For the three-dimensional representation of this application Figure 2 ;
[0031] Figure 3 For the three-dimensional representation of this application Figure 3 ;
[0032] Figure 4 This is a schematic diagram of the front structure in the initial state of this application;
[0033] Figure 5 This is a front structural diagram of the multi-layer flexible sleeve of this application;
[0034] Figure 6 This is a schematic diagram of the front structure of the inner test ring of this application;
[0035] Figure 7 This is a schematic diagram of the front structure of this application during installation. Figure 1 ;
[0036] Figure 8 This is a schematic diagram of the front structure of this application during installation. Figure 2 ;
[0037] Figure 9 This is a schematic diagram of the front structure of this application during installation. Figure 3 ;
[0038] Figure 10 This is a schematic diagram of the front structure of this application during installation. Figure 4 ;
[0039] Figure 11 This is a schematic diagram of the front structure of this application during installation. Figure 5 ;
[0040] Figure 12 This is a front view of the structure of the present application when the water level sensor is installed.
[0041] Explanation of the labels in the diagram:
[0042] 1. Installation pipe, 2. Spacer ring, 3. Injection pipe, 4. Liquid injection pipe, 5. Multi-layer flexible sleeve, 51. Outer sleeve, 52. Intermediate sleeve, 53. Buffer material, 54. Inner ring, 5401. Hollow mesh ring, 5402. Mesh sleeve, 5403. Water-soluble film, 55. Inner sleeve, 61. Main sealing plate, 62. Secondary sealing plate, 7. Rotating rod, 701. Screw hole one, 702. Screw hole two, 8. Fixed rod, 801. Screw hole three, 9. Drainage pipe, 10. Water injection pipe. Detailed Implementation
[0043] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0044] Example 1:
[0045] Please see Figure 1 This application discloses a drainage pipe support and connection structure for municipal engineering, including a pair of installation pipes 1, which are used to connect and fix to the pipeline. Each pair of installation pipes 1 has a spacer ring 2 fixedly connected to one end of each other. Multiple layers of flexible sleeves 5 are fixedly connected between the spacer rings 2. The interior of each pair of installation pipes 1 is respectively provided with a main sealing plate 61 and a secondary sealing plate 62. Figure 2 and Figure 3 As shown, the sides of the main sealing plate 61 and the auxiliary sealing plate 62 are both arc-shaped surfaces, and the outer diameter of the arc-shaped surface is the same as the inner diameter of the installation pipe 1. When the two are in complete contact, a surface contact sealing state can be achieved, thereby controlling the flow of water inside the installation pipe 1 through the main sealing plate 61 and the auxiliary sealing plate 62.
[0046] Please see Figure 2 and Figure 3 Both the main sealing plate 61 and the secondary sealing plate 62 are fixedly connected to the upper and lower ends of a rotating rod 7. The rotating rod 7 moves through the inner wall of the mounting tube 1 and extends to the outside. The outer end of the mounting tube 1 is fixedly connected to a pair of fixed rods 8 that correspond one-to-one with the rotating rod 7. A fastening assembly is threaded between the rotating rod 7 and the fixed rod 8. The fixing between the rotating rod 7 and the fixed rod 8 fixes the main sealing plate 61 and the secondary sealing plate 62, keeping the main sealing plate 61 and the secondary sealing plate 62 in the required open or closed state.
[0047] Please see Figure 2 and Figure 3The rotating rod 7 has two perpendicular screw holes, 701 and 702, and the fixed rod 8 has a pair of parallel screw holes, 801. Screw holes 701 and 702 are located on the same horizontal plane as screw holes 801. The fastening assembly includes matching bolts and nuts. Screw holes 701, 702, and 801 are all matched with bolts. Figure 2 As shown, when the main sealing plate 61 and the secondary sealing plate 62 are in the closed state inside the mounting tube 1, screw hole 701 and the corresponding screw hole 801 are on the same straight line. At this time, the main sealing plate 61 and the secondary sealing plate 62 can be fixed by connecting them through the fastening assembly; as shown Figure 3 As shown, when the main sealing plate 61 and the secondary sealing plate 62 are in the open state inside the mounting tube 1, the screw hole 2 702 and the corresponding screw hole 3 801 are on the same straight line. At this time, the two are connected by the fastening assembly, which can also achieve the fixation of the main sealing plate 61 and the secondary sealing plate 62.
[0048] Please see Figure 3 and Figure 4 A pair of spacer rings 2 are respectively fixedly connected to the upper ends of a material injection pipe 3 and a liquid injection pipe 4. The lower end of the spacer ring 2 with the liquid injection pipe 4 is fixedly connected to a drain pipe 9. The material injection pipe 3, the liquid injection pipe 4 and the drain pipe 9 all pass through the spacer ring 2 and communicate with the interior of the multi-layer flexible sleeve 5. The lower end of one of the installation pipes 1 is fixedly connected to a water injection pipe 10 that communicates with it. The water injection pipe 10 is located between the rotating rod 7 and the spacer ring 2.
[0049] Please see Figure 5 The multi-layer flexible sleeve 5 includes an outer sleeve 51, a middle sleeve 52, and an inner sleeve 55 distributed sequentially from the outside to the inside. The two ends of each of the three are fixedly connected to a pair of spacer rings 2. The space between the outer sleeve 51 and the middle sleeve 52 is filled with a buffer material 53. The buffer material 53 is made of P4U material, which is soft and elastic under normal conditions, but will tighten and harden when subjected to violent collision or impact, forming a protective layer. When the external force disappears, it returns to a soft and elastic state. The buffer material 53 can effectively resist external impact and play a protective role for the multi-layer flexible sleeve 5. An inner measuring ring 54 is provided between the middle sleeve 52 and the inner sleeve 55.
[0050] Please see Figure 6The inner ring 54 includes multiple hollow mesh rings 5401 and multiple mesh sleeves 5402. The hollow mesh rings 5401 and mesh sleeves 5402 are spaced apart and fixedly connected to each other, and the number of both is the same. The mesh sleeves 5402 away from the injection pipe 3 are fixedly connected to the spacer ring 2. The ends of the injection pipe 4 and the drain pipe 9 are located inside the opening end of the mesh sleeve 5402. That is, liquid can be filled and discharged inside the inner ring 54 through the injection pipe 4 and the drain pipe 9. The outer surfaces of the hollow mesh rings 5401 and the mesh sleeves 5402 are both bonded with a water-soluble film 5403. The water-soluble film 5403 is a water-soluble plastic film with the characteristic of being soluble in cold water. The end of the injection pipe 3 is located between the middle sleeve 52 and the inner sleeve 55.
[0051] A drainage pipe support and connection structure for municipal engineering, the method of its use is as follows:
[0052] S1. Basic connection: Connect a pair of installation pipes 1 to the ports of a pair of pipes respectively to achieve communication between the pair of pipes. This is the existing technology and generally uses bolt connection.
[0053] S2, Shaping Operation:
[0054] S2-1, as shown Figure 4 As shown, rotate the main sealing plate 61 and the auxiliary sealing plate 62 so that their side arc surfaces fit against the inner wall of the mounting tube 1 to seal the mounting tube 1;
[0055] S2-2, as shown Figure 7 As shown, sufficient water is filled into the inside of the injection pipe 3 and the multi-layer flexible sleeve 5 through the water injection pipe 10, and the state of the multi-layer flexible sleeve 5 during the drainage process is simulated and revealed.
[0056] Since the installation pipe 1 has been sealed in step S2-1, the water will fill the space between the main sealing plate 61 and the secondary sealing plate 62 after entering the water injection pipe 10, saturating the inner side of the multi-layer flexible sleeve 5, so that it shows the state when draining, which is convenient for shaping it later.
[0057] S2-3, such as Figure 8 As shown, seal the drain pipe 9 port, and then fill the inner ring 54 with liquid phase change filler through the injection pipe 4. After filling, cool and solidify.
[0058] Liquid phase-change fillers can be made from paraffin wax that has been heated and liquefied, and after cooling, it can be solid at room temperature.
[0059] S2-4, such as Figure 9 As shown, liquid shaping filler is filled between the intermediate sleeve 52 and the inner sleeve 55 through the injection pipe 3, and then dried and cured to shape the multi-layer flexible sleeve 5 into its state during drainage.
[0060] The liquid shaped filler can be silicate cement slurry. After it loses water and solidifies, it can form a high-strength solid structure that can withstand the impact of water flow during drainage without easily shaking, thereby further improving the connection stability between the installation pipe 1 and the pipeline. Since the liquid phase-change filler has been filled and solidified in steps S2-3, even if the liquid shaped filler contains a certain amount of water, which will cause the water-soluble film 5403 to dissolve, the liquid shaped filler will not easily enter the hollow mesh ring 5401 and the mesh sleeve 5402.
[0061] At this time, rotating the main sealing plate 61 and the auxiliary sealing plate 62 to open them can restore the water conveyance function of the installation pipe 1, allowing the drainage process of this application to proceed smoothly.
[0062] S3. Visual inspection procedure:
[0063] S3-1, such as Figure 10 As shown, the liquid phase-changing packing is heated and softened, and then discharged through the drain pipe 9;
[0064] S3-2, such as Figure 11 As shown, seal the port of the drain pipe 9 again, inject sufficient water into the inner ring 54 through the injection pipe 4, and then seal the injection pipe 4.
[0065] S3-3. When the water volume suddenly decreases after opening the injection pipe 4, it indicates that the shaped packing material has internal cracks.
[0066] Since the water-soluble film 5403 has dissolved in water in step S2-4, when water is injected into the inner ring 54, the water will directly contact the solidified shaped filler. When the solid shaped filler breaks internally under the impact of water flow for a long time, the water inside the inner ring 54 will enter the cracks, reducing the water inside the inner ring 54 and significantly lowering the water level in the injection tube 4. Thus, visual observation can reflect whether the shaped filler has internal breakage to a certain extent, facilitating timely disassembly and replacement of this application and preventing greater losses.
[0067] Please see Figure 12 In step S3-3 above, visual observation is used to effectively judge the breakage of the shaped filler. To improve the timeliness and convenience of the judgment, a water level sensor can be selectively installed on the inner wall of the injection pipe 4 near the inner ring 54. The water level sensor can monitor the changes in the liquid level in the injection pipe 4 in a timely and effective manner.
[0068] This application establishes a multi-layered flexible sleeve 5, which can be filled with shaped filler, between a pair of installation pipes 1. Firstly, the flexible sleeve 5's inherent flexibility allows it to adapt freely to the pipe installation environment, achieving connectivity between the two non-linearly distributed pipes. Then, by filling with water, the state of the multi-layered flexible sleeve 5 during drainage is simulated and revealed. Next, a solidifiable liquid shaped filler is injected into the revealed multi-layered flexible sleeve 5, allowing it to form a high-strength solid structure, thus completing the shaping of the multi-layered flexible sleeve 5. This design not only provides high environmental adaptability but also stable resistance to water flow impacts, making the connection between the installation pipe 1 and the pipe more stable. Furthermore, by visually observing the water level changes in the inner ring 54, the design can effectively reflect whether the shaped filler has internal breakage, facilitating timely disassembly and replacement and minimizing potential damage.
[0069] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within the scope of protection of this application.
Claims
1. A drainage pipe support and connection structure for municipal engineering, comprising a pair of installation pipes (1), characterized in that, Each pair of mounting tubes (1) is fixedly connected to a spacer ring (2) at one end close to the other. A multi-layer flexible sleeve (5) is fixedly connected between the pair of spacer rings (2). The inside of each pair of mounting tubes (1) is provided with a main sealing plate (61) and a secondary sealing plate (62). The upper and lower ends of the main sealing plate (61) and the secondary sealing plate (62) are fixedly connected with rotating rods (7). The rotating rods (7) movably penetrate the inner wall of the mounting tube (1) and extend to the outside. The outer end of the mounting tube (1) is fixedly connected with a pair of fixed rods (8) corresponding one-to-one with the rotating rods (7). A fastening assembly is threaded between the rod (7) and the fixed rod (8). The upper ends of a pair of spacers (2) are respectively fixedly connected to a material injection pipe (3) and a liquid injection pipe (4). The lower end of the spacer (2) with the liquid injection pipe (4) is fixedly connected to a drain pipe (9). The material injection pipe (3), the liquid injection pipe (4) and the drain pipe (9) all pass through the spacer (2) and communicate with the interior of the multi-layer flexible sleeve (5). The lower end of one of the installation pipes (1) is fixedly connected to a water injection pipe (10) that communicates with it. The water injection pipe (10) is located between the rotating rod (7) and the spacer (2). The multi-layer flexible sleeve (5) includes an outer sleeve (51), a middle sleeve (52) and an inner sleeve (55) distributed sequentially from the outside to the inside, and the two ends of the three are respectively fixedly connected to a pair of spacer rings (2). The space between the shrinking outer sleeve (51) and the middle sleeve (52) is filled with buffer material (53), and an inner measuring ring (54) is provided between the middle sleeve (52) and the inner sleeve (55). The inner ring (54) includes multiple hollow mesh rings (5401) and multiple mesh sleeves (5402). The hollow mesh rings (5401) and mesh sleeves (5402) are distributed at intervals and fixedly connected to each other, and the number of the two is the same. The mesh sleeves (5402) away from the injection pipe (3) are fixedly connected to the spacer ring (2), and the pipe ends of the injection pipe (4) and the drainage pipe (9) are located inside the opening end of the mesh sleeve (5402). The outer surfaces of the hollow mesh ring (5401) and the mesh sleeve (5402) are both bonded with a water-soluble film (5403), and the end of the injection pipe (3) is located between the intermediate sleeve (52) and the inner sleeve (55). A water level sensor is installed on the inner wall of the injection tube (4) near the inner ring (54).
2. The drainage pipe support and connection structure for municipal engineering according to claim 1, characterized in that, The sides of the main sealing plate (61) and the secondary sealing plate (62) are both arc-shaped, and the outer diameter of the arc-shaped surface is the same as the inner diameter of the mounting tube (1).
3. The drainage pipe support and connection structure for municipal engineering according to claim 1, characterized in that, The rotating rod (7) has two mutually perpendicular screw holes, one (701) and two (702), and the fixed rod (8) has a pair of mutually parallel screw holes, three (801). The screw holes one (701) and two (702) are located on the same horizontal plane as the pair of screw holes three (801).
4. The drainage pipe support and connection structure for municipal engineering according to claim 3, characterized in that, The fastening assembly includes matching bolts and nuts, and the screw holes one (701), two (702) and three (801) are all matched with the bolts.
5. The drainage pipe support and connection structure for municipal engineering according to claim 1, characterized in that, Its usage method is as follows: S1, Basic connection: Connect a pair of installation pipes (1) to the ports of a pair of pipes respectively to achieve the connection between the pair of pipes; S2, Shaping Operation: S2-1. Rotate the main sealing plate (61) and the secondary sealing plate (62) so that their side arc surfaces fit against the inner wall of the mounting pipe (1) to seal the mounting pipe (1); S2-2. Fill the inside of the injection pipe (3) and the multi-layer flexible sleeve (5) with sufficient water through the water injection pipe (10) to simulate and reveal the state of the multi-layer flexible sleeve (5) during the drainage process. S2-3. Seal the port of the drain pipe (9), and then fill the inner ring (54) with liquid phase change filler through the injection pipe (4). After filling, cool and solidify. S2-4. Liquid shaping filler is filled between the intermediate sleeve (52) and the inner sleeve (55) through the injection pipe (3), and then dried and cured to shape the multi-layer flexible sleeve (5) in the state of drainage. S3. Visual inspection procedure: S3-1. The liquid phase-changing packing is heated and softened, and then discharged through the drain pipe (9); S3-2. Seal the port of the drain pipe (9) again, inject sufficient water into the inner ring (54) through the injection pipe (4), and then seal the injection pipe (4). S3-3. When the water volume suddenly decreases after opening the injection pipe (4), it indicates that the shaped packing has internal cracks.
Citation Information
Patent Citations
High-adaptability stainless steel pipe joint
CN113389959A