CN222316243U

CN222316243U - Water conservancy pipeline connection structure

Info

Publication number: CN222316243U
Application number: CN202421199257.XU
Authority: CN
Inventors: 陈昱锡; 刘嵩寿; 杨海昆; 范昊炳; 周富杰
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2024-05-29
Filing date: 2024-05-29
Publication date: 2025-01-07
Anticipated expiration: 2034-05-29

Abstract

The utility model discloses a water conservancy pipeline connection structure, which relates to the technical field of water conservancy engineering, and comprises two flanges arranged oppositely and respectively sealed and fixed at the ends of the pipelines on both sides, the flange holes between the two flanges are connected by bolts; a first sealing structure and a second sealing structure are arranged between the two flanges; the first sealing structure comprises a chamfer arranged outside the center hole of the flange and a fixing sleeve inserted in the center hole, the fixing sleeve is provided with a guide bevel which expands outward and matches the chamfer, a first sealing ring is sandwiched between the guide bevel and the chamfer; a second sealing ring is sandwiched between the two opposite fixing sleeves; the second sealing structure comprises a sealing pad sandwiched between the two flanges. By arranging a two-layer sealing structure, the sealing effect is improved, and liquid leakage caused by aging of the sealing pad is avoided.

Description

Water conservancy pipeline connection structure

Technical Field

The utility model relates to the technical field of hydraulic engineering, in particular to a hydraulic pipeline connecting structure.

Background

In hydraulic engineering, pipelines are often required to be connected, sealing gaskets are generally clamped between flange plates of two pipelines in the existing connection mode, and then the two flanges are screwed down through bolts, so that sealing is achieved, but the sealing mode is unstable in sealing, the sealing gaskets are easy to age, and when the flange plates are stressed unevenly, local leakage of the sealing gaskets is easy to cause.

Disclosure of utility model

The utility model aims to provide a water conservancy pipeline connecting structure, which improves the sealing effect and avoids liquid leakage caused by ageing of a sealing gasket by arranging two layers of sealing structures.

The utility model provides a water conservancy pipeline connecting structure, which comprises two flange plates which are oppositely arranged and respectively fixed at the end parts of pipelines at two sides in a sealing way, wherein flange holes between the two flange plates are connected through bolts, a first sealing structure and a second sealing structure are arranged between the two flange plates, the first sealing structure comprises a chamfer arranged at the outer side of a central hole of the flange plate and a fixing sleeve inserted into the central hole, a guide inclined surface which is outwards expanded and matched with the chamfer is arranged on the fixing sleeve, a first sealing ring is clamped between the guide inclined surface and the chamfer, a second sealing ring is clamped between the two opposite fixing sleeves, and the second sealing structure comprises a sealing gasket clamped between the two flange plates.

After the structure is adopted, when the bolts between the two flange plates are screwed, the flange plates clamp the fixed sleeves, the interaction forces of the two fixed sleeves are respectively extruded to two sides, so that chamfering and guiding inclined planes are pressed, the first sealing ring and the second sealing ring are clamped, the first layer of sealing is realized, the two flange plates are mutually extruded, the sealing gasket is clamped, and the second layer of sealing is realized. When the pressure of water flow in the pipeline is large and the pressure is exerted outwards, the two fixing sleeves repel each other, acting force between the two flange plates is dispersed to the whole flange plate, and the acting force of bolts is not only relied on, so that the impact strength of the sealing gasket is reduced, the sealing effect is improved, the sealing is firmer, and meanwhile, the problem of local leakage caused by uneven stress of the flange plate is avoided.

In order to ensure the stability of the fit between the fixing sleeve and the flange, the first sealing ring is prevented from being stressed unevenly, so that the inclination angles of the chamfer and the guide inclined plane are consistent.

In order to improve the force transmission effect and reduce the stress of the bolt, the inclination angle is 10-45 degrees.

In order to further improve the force transmission effect, the inclination angle is 30 °.

In order to avoid the formation of a step surface and the resistance of water flow delivery, the inner end surface of one end of the fixing sleeve inserted into the central hole is provided with a transition inclined surface.

In order to ensure the stable positions of the first sealing ring and the second sealing ring, a first sealing ring installation groove is formed in the guide inclined plane, and a second sealing ring installation groove is formed in the fixing sleeve corresponding to the second sealing ring.

In order to improve the stability of the installation position of the sealing gasket, the sealing gasket is of an annular structure, and an avoidance hole is formed in the sealing gasket corresponding to the flange hole of the flange plate.

After the technical scheme is adopted, the utility model has the beneficial effects that:

The water conservancy pipeline connecting structure solves the technical problem of poor sealing performance of pipeline connection in the prior art, and the sealing effect is improved and liquid leakage caused by ageing of the sealing gasket is avoided by arranging the two-layer sealing structure.

Drawings

FIG. 1 is a schematic structural view of a hydraulic pipeline connecting structure according to the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

fig. 4 is a partial enlarged view of a in fig. 3.

In the figure, 1, a pipeline, 2, a flange plate, 21, a central hole, 3, a first sealing structure, 31, a chamfer, 32, a fixed sleeve, 321, a guide inclined surface, 322, a transition inclined surface, 33, a first sealing ring, 34, a second sealing ring, 4, a sealing gasket, 41 and an avoidance hole.

Detailed Description

The utility model is further elucidated below in conjunction with the accompanying drawings.

The orientations referred to in the specification are all based on the orientations of the water conservancy pipeline connecting structure in normal operation, are not limited to the orientations in storage and transportation, and only represent relative positional relationships and not absolute positional relationships.

As shown in fig. 1, the water conservancy pipeline connecting structure comprises two flanges 2 which are oppositely arranged and respectively fixed at the end parts of pipelines 1 at two sides in a sealing way, wherein the flanges 2 are fixed on the pipelines 1 through welding. The flange holes between the two flanges 2 are connected by bolts.

As shown in fig. 2, 3 and 4, a first sealing structure 3 and a second sealing structure are arranged between the two flanges 2, and the first sealing structure 3 comprises a chamfer 31 arranged outside the central hole 21 of the flange 2 and a fixing sleeve 32 inserted into the central hole 21. The fixing sleeve 32 is provided with an outwards-expanded guide inclined plane 321 matched with the chamfer 31, the fixing sleeve 32 comprises a cylinder body and a conical cylinder body, the outer diameter of the cylinder body is matched with the inner diameter of the central hole 21, so that smooth insertion of the cylinder body can be ensured, and the outer contour of the conical cylinder body is the guide inclined plane 321 which is matched with the chamfer 31.

The first seal ring 33 is clamped between the guide inclined surface 321 and the chamfer 31, and a first seal ring mounting groove is arranged on the guide inclined surface 321 in order to prevent the first seal ring 33 from sliding and causing seal failure. The second seal ring 34 is clamped between the two opposite fixed sleeves 32, and in order to ensure the position of the second seal ring 34, a second seal ring mounting groove is arranged on the fixed sleeve 32 corresponding to the second seal ring 34.

The second sealing structure comprises a sealing gasket 4 clamped between the two flanges 2, the sealing gasket 4 is of an annular structure, and the flange holes corresponding to the flanges 2 are provided with avoiding holes 41.

In the mounting process, the first sealing ring 33 is firstly mounted on the fixing sleeve 32, then the fixing sleeve 32 is inserted into the center hole 21 of the corresponding flange plate 2, then the sealing gasket 4 is clamped between the two flange plates 2, and the two flange plates 2 are screwed down through bolts. After the bolts between the two flanges 2 are screwed, the flanges 2 clamp the fixed sleeves 32, the two fixed sleeves 32 are pressed towards two sides by interaction force, so that the chamfer 31 and the guide inclined plane 321 are pressed, the first sealing ring 33 and the second sealing ring 34 are clamped, the first layer of sealing is realized, the two flanges 2 are mutually pressed, the sealing gasket 4 is clamped, and the second layer of sealing is realized. When the water flow pressure in the pipeline 1 is large and the pressure is applied outwards, the two fixing sleeves 32 repel each other, the acting force between the two flanges 2 is dispersed to the whole flange 2, and the acting force of bolts is not only relied on, so that the impact strength of the sealing gasket 4 is reduced, the sealing effect is improved, the sealing is firmer, and meanwhile, the problem of local leakage caused by uneven stress of the flange 2 is avoided.

The inclination angles of the chamfer 31 and the guide inclined surface 321 may be inconsistent, but in order to ensure the stability of the fit of the fixing sleeve 32 and the flange, the first seal ring 33 is prevented from being stressed unevenly, so the inclination angles of the chamfer 31 and the guide inclined surface 321 are consistent. The inclination angle is 10-45 °, and in this embodiment, the inclination angle is preferably 30 °.

In order to avoid the formation of a stepped surface, which causes water flow conveying resistance, an inner end surface of one end of the fixing sleeve 32 inserted into the center hole 21 is provided with a transition slope 322.

It should be understood that the above description is not intended to limit the utility model to the particular embodiments disclosed, but to limit the utility model to the particular embodiments disclosed, and that the utility model is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the utility model.

Claims

1. A water conservancy pipeline connecting structure is characterized by comprising two flanges which are oppositely arranged and respectively fixed at the end parts of pipelines at two sides in a sealing way, wherein flange holes between the two flanges are connected through bolts;

The first sealing structure comprises a chamfer arranged at the outer side of a central hole of the flange plate and a fixing sleeve inserted in the central hole, wherein the fixing sleeve is provided with a guide inclined surface which expands outwards and is matched with the chamfer, and a first sealing ring is clamped between the guide inclined surface and the chamfer;

the second seal structure includes a gasket clamped between the two flanges.

2. The hydraulic pipeline connecting structure according to claim 1, wherein the chamfer angle is identical to the inclination angle of the guide inclined surface.

3. The hydraulic pipeline connecting structure according to claim 2, wherein the inclination angle is 10-45 degrees.

4. A hydraulic pipe connection according to claim 3, wherein the inclination angle is 30 °.

5. The hydraulic pipeline connecting structure according to claim 1, wherein a transition inclined plane is arranged on the inner end surface of one end of the fixing sleeve inserted into the central hole.

6. The hydraulic pipeline connecting structure according to claim 1, wherein the guide inclined surface is provided with a first sealing ring mounting groove, and the fixing sleeve is provided with a second sealing ring mounting groove corresponding to the second sealing ring.

7. The hydraulic pipeline connecting structure of claim 1, wherein the sealing gasket is of an annular structure, and the flange holes corresponding to the flange plates are provided with avoiding holes.