A pipeline connecting device for hydraulic engineering

Abstract

The utility model relates to water conservancy engineering technical field discloses a pipeline connecting device for water conservancy engineering, including bellows, both ends of bellows are fixedly connected with flange no.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, and in particular to a pipe connection device for water conservancy projects. Background Technology

[0002] In water conservancy projects, pipeline systems are a key component for the transportation, distribution, and regulation of water resources. Different water conservancy projects, such as irrigation systems, urban water supply systems, drainage systems, and hydropower station water transmission systems, all require a large number of pipelines to connect their various parts.

[0003] Pipe fittings serve as the core connection, connecting different pipes. During installation, the bellows' expansion and flexibility compensate for pipe displacement caused by various factors. Next, flanges are installed at both ends of the pipe fitting, ensuring the flange faces are perpendicular to and parallel to the pipe axis. Then, double-ended studs are passed through the bolt holes on the flanges, and nuts are tightened at both ends. Rotating the nuts generates axial tension in the studs, causing the two flanges to fit tightly together, achieving a reliable seal. During this process, screws can be used to assist in fixing or connecting other related components, ensuring the stability of the entire connection structure. Ultimately, this results in a tight, well-sealed pipe connection, capable of adapting to complex working conditions in hydraulic engineering projects.

[0004] The high-pressure water flow in the pipeline will generate vibration during operation. Due to the long-term vibration of the pipeline, the screws on the flange will loosen, which will eventually increase the gap in the middle of the flange and cause the sealing ring to leak. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a pipe connection device for water conservancy projects, which aims to improve the problem of water leakage and seepage caused by poor sealing of pipe connections in the existing technology.

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

[0007] A pipe connection device for water conservancy projects includes a corrugated pipe, with flange two fixedly connected to both ends of the corrugated pipe. Multiple screws are slidably connected inside the flange two, and flange one is slidably connected between the outer sides of the multiple screws. A locking nut is threadedly connected to the outer side of the screws. Multiple fixing seats are fixedly connected to the outer side of flange one, and pins are slidably connected inside the fixing seats. A spring is sleeved on the outer side of the pins, and a rubber ring is fixedly connected to the bottom of the outer side. A sealing ring is embedded inside flange one.

[0008] As a further description of the above technical solution:

[0009] The locking nut has a locking groove on its outer side, and the bottom end of the pin is inserted into the locking groove.

[0010] As a further description of the above technical solution:

[0011] A round cap is fixedly connected to the end of the pin away from the stop nut.

[0012] As a further description of the above technical solution:

[0013] Multiple double-ended studs are provided between the two flanges, and nuts are threaded onto both sides of the double-ended studs.

[0014] As a further description of the above technical solution:

[0015] One end of the spring is located on the side of the fixed seat near the stop nut, and the other end of the spring is located on the side of the limiting ring away from the stop nut.

[0016] As a further description of the above technical solution:

[0017] One end of the sealing ring abuts against the side of the flange closest to the bellows.

[0018] As a further description of the above technical solution:

[0019] The outer side of the rubber ring and the sealing ring abut against each other.

[0020] As a further description of the above technical solution:

[0021] The second flange and the first flange abut against each other, and the stop nut is located on the side of the first flange away from the second flange.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, traditional threaded connections are prone to loosening in the complex vibration and impact environment of water conservancy projects. The pin and locking groove cooperate, and the spring provides continuous thrust to form a mechanical lock. Compared with simply relying on the friction of the thread to prevent loosening, the effect is significantly improved, greatly reducing the risk of pipeline connection failure and water leakage caused by loose nuts, and ensuring the safe operation of water conservancy projects.

[0024] 2. In this utility model, the flange adopts a double sealing structure of rubber ring and sealing ring. When the flange is squeezed against each other, the two sealing rings fill the gap from different positions and angles, which greatly improves the sealing effect and effectively prevents water leakage and seepage at the pipe connection in water conservancy projects, ensuring the efficient transmission and utilization of water resources. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a pipe connection device for water conservancy projects proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the flange connection structure of a pipeline connection device for water conservancy projects proposed in this utility model;

[0027] Figure 3 This is a structural schematic diagram of a screw for a pipe connection device in water conservancy engineering proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of a pin in a pipe connection device for water conservancy projects proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of a corrugated pipe, a pipe connection device for water conservancy projects, proposed in this utility model.

[0030] Legend:

[0031] 1. Flange 1; 2. Bellows; 3. Flange 2; 4. Screw; 5. Double-ended stud; 6. Nut; 7. Locking nut; 8. Rubber ring; 9. Sealing ring; 10. Pin; 11. Round cap; 12. Spring; 13. Limit ring; 14. Fixing base; 15. Locking groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figures 1-5 A pipe connection device for water conservancy projects includes a corrugated pipe 2, with flanges 3 fixedly connected to both ends of the corrugated pipe 2. The corrugated pipe 2 can adjust the gap between pipe connections. Multiple screws 4 are slidably connected inside the flanges 3. A flange 1 is slidably connected between the outer sides of the multiple screws 4. A stop nut 7 is threadedly connected to the outer side of the screws 4. The stop nut 7 can effectively prevent loosening caused by pipe vibration. Multiple fixing seats 14 are fixedly connected to the outer side of the flange 1. A pin 10 is slidably connected inside the fixing seat 14. A spring 12 is sleeved on the outer side of the pin 10. A limit ring 13 is fixedly connected to the bottom of the outer side of the pin 10. A rubber ring 8 is provided inside the flange 1. A sealing ring 9 is embedded inside the flange 3. The rubber ring 8 and the sealing ring 9 form a double seal under the contact of the flanges 1 and 3.

[0034] Reference Figures 1-4The outer side of the stop nut 7 is provided with a locking groove 15. The locking groove 15 can conveniently and effectively restrict the movement of the pin 10. The bottom end of the pin 10 is inserted into the locking groove 15. The pin 10 is fixed in the locking groove 15, which can lock the stop nut 7 well and prevent it from loosening.

[0035] Reference Figures 1-4 A round cap 11 is fixedly connected to the end of the pin 10 away from the stop nut 7. The addition of the round cap 11 makes the use of the pin 10 more convenient and easy.

[0036] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 Multiple double-ended studs 5 are provided between the two flanges 2 3. Nuts 6 are threaded to both sides of the double-ended studs 5. The length of the bellows 2 is controlled by the cooperation of the double-ended studs 5 and the nuts 6, which facilitates the construction of pipeline connections.

[0037] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 One end of the spring 12 is located on the side of the fixed seat 14 near the stop nut 7, and the other end of the spring 12 is located on the side of the limiting ring 13 away from the stop nut 7. The spring 12 provides elastic force to reset the pin 10.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 One end of the sealing ring 9 abuts against the side of flange 1 near the bellows 2, and the sealing ring 9 improves the sealing performance of flange 1 and flange 2 3.

[0039] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 The rubber ring 8 and the sealing ring 9 abut against each other, forming a double seal through the abutment between the sealing ring 9 and the rubber ring 8, thereby improving the sealing performance.

[0040] Reference Figures 1-5 Flange 2 3 and flange 1 abut against each other. The stop nut 7 is located on the side of flange 1 away from flange 2 3. The screw 4 and the stop nut 7 are threaded together to provide a sealing effect for flange 1 and flange 2 3.

[0041] Working Principle: During the installation of this water conservancy project pipeline connection device, the flanges 2 and 3 at both ends of the corrugated pipe 2 are first preliminarily positioned with the corresponding parts of the pipe to be connected. Then, flange 1 is connected to flange 2 and 3 using screws 4. The screws 4 slide inside flange 2 and 3, allowing flange 1 to be flexibly adjusted for easy alignment. Next, the locking nut 7 is rotated and tightened along the outside of the screws 4, initially fixing flange 1 and flange 2 and 3. Then, double-ended studs 5 are installed between the two flanges 2 and 3, passing through corresponding holes on flange 2 and 3, with nuts 6 threaded onto their outer sides. Tightening the nuts 6 brings the two flanges 2 and 3 closer together and compresses them, simultaneously causing flange 1 to fit further. During this process, the rubber ring 8 inside flange 1 and the sealing ring 9 embedded inside flange 2 and 3 play crucial roles. One end of the sealing ring 9 abuts against the side closest to the corrugated pipe 2. When the flanges are compressed, both the sealing ring 9 and the rubber ring 8 are deformed, filling the tiny gaps between the flanges and at the pipe connection, thus creating a good seal. The corrugated pipe 2 itself possesses excellent extensibility and flexibility, enabling it to adapt to deformation when the pipeline shifts due to factors such as thermal expansion and contraction or foundation settlement, preventing loosening or sealing failure at the connection due to stress concentration. A double sealing structure using rubber rings 8 and sealing rings 9 is employed. When the flanges are pressed together, the two sealing rings 9 fill the gap from different positions and angles, greatly improving the sealing effect and effectively preventing leakage and seepage at pipeline connections in water conservancy projects, ensuring efficient water resource transmission and utilization. After the initial installation of the pipeline connection device is completed and the stop nut 7 is tightened, the round cap 11 is pressed down, causing the pin 10 to move downwards. At this time, the spring 12 begins to compress and deform under the pressure of the limiting ring 13 and the fixed seat 14, accumulating elastic potential energy. When the bottom end of the pin 10 is accurately inserted into the locking groove 15 outside the stop nut 7, the round cap 11 is released. Under the action of elastic restoring force, the spring 12 pushes the limiting ring 13, keeping the pin 10 always within the locking groove 15, thus mechanically limiting the stop nut 7. This structure effectively prevents the locking nut 7 from loosening due to water flow impact and pipeline vibration during the operation of water conservancy pipelines, ensuring a stable fastening state between the screw 4 and flange 1 and flange 3. Traditional threaded connections are prone to loosening in the complex vibration and impact environment of water conservancy projects. The pin 10 and locking groove 15 cooperate, and the spring 12 provides continuous thrust to form a mechanical lock. Compared with relying solely on thread friction to prevent loosening, the effect is significantly improved, greatly reducing the risk of pipeline connection failure and leakage caused by the loosening of nut 6, ensuring the safe operation of water conservancy projects, maintaining the anti-loosening effect, avoiding loosening of connecting parts due to frequent vibration, and reducing maintenance frequency and costs. It effectively prevents pipeline leaks and detachment caused by the loosening of nut 6, avoiding economic losses and environmental pollution caused by water resource leakage. The flange 3 is connected and fastened to the pipeline by the screw 4, double-ended stud 5, nut 6 and locking nut 7, making the device and pipeline reliably connected.Flange 1 can be connected to the pipe port to achieve pipe connection. Rubber ring 8 and sealing ring 9 are compressed during the tightening process of flange 3, filling the connection gap, preventing water leakage, and ensuring the seal of the connection. Bellows 2 has expandable and bendable characteristics, absorbing displacement and deformation of the pipe caused by temperature changes, foundation settlement, etc., reducing the impact of stress on the pipe connection and protecting the stability of the connection structure. Pin 10, together with round cap 11, spring 12, limit ring 13, and fixing seat 14, may prevent components from loosening and limit the range of movement of components, ensuring that all components of the connection device maintain the correct position and state during operation.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pipe connection device for water conservancy projects, comprising a corrugated pipe (2), characterized in that: Both ends of the corrugated pipe (2) are fixedly connected to flange two (3). Multiple screws (4) are slidably connected inside flange two (3). Flange one (1) is slidably connected between the outer sides of the multiple screws (4). A stop nut (7) is threadedly connected to the outer side of the screws (4). Multiple fixing seats (14) are fixedly connected to the outer side of flange one (1). A pin (10) is slidably connected inside the fixing seat (14). A spring (12) is sleeved on the outer side of the pin (10). A limit ring (13) is fixedly connected to the bottom of the outer side of the pin (10). A rubber ring (8) is provided inside flange one (1). A sealing ring (9) is embedded inside flange two (3).

2. The pipe connection device for water conservancy projects according to claim 1, characterized in that: The locking nut (7) has a locking groove (15) on its outer side, and the bottom end of the pin (10) is inserted into the locking groove (15).

3. A pipe connection device for water conservancy projects according to claim 1, characterized in that: A round cap (11) is fixedly connected to the end of the pin (10) away from the stop nut (7).

4. A pipe connection device for water conservancy projects according to claim 1, characterized in that: Multiple double-ended studs (5) are provided between the two flanges (3), and nuts (6) are threaded to both sides of the double-ended studs (5).

5. A pipe connection device for water conservancy projects according to claim 2, characterized in that: One end of the spring (12) is located on the side of the fixed seat (14) near the stop nut (7), and the other end of the spring (12) is located on the side of the limiting ring (13) away from the stop nut (7).

6. A pipe connection device for water conservancy projects according to claim 2, characterized in that: One end of the sealing ring (9) abuts against the side of the flange (1) near the bellows (2).

7. A pipe connection device for water conservancy projects according to claim 1, characterized in that: The rubber ring (8) abuts against the outer side of the sealing ring (9).

8. A pipe connection device for water conservancy projects according to claim 1, characterized in that: The second flange (3) and the first flange (1) abut against each other, and the stop nut (7) is located on the side of the first flange (1) away from the second flange (3).

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