CN218267829U

CN218267829U - Leakage-proof device for pipeline connection

Info

Publication number: CN218267829U
Application number: CN202222388737.8U
Authority: CN
Inventors: 荣庆军; 宗辉; 高坤; 王庆禄
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-01-10
Anticipated expiration: 2032-09-06

Abstract

The utility model relates to a pipe connection leak protection device in pipeline connection technical field, including coming the flow tube, going the flow tube, still include the connecting pipe, the connecting pipe interlude is the ripple section, and a connecting pipe corresponding a flow tube tip inside pipe wall is equipped with incoming flow tube mouth end face seal complex step face, and step face inside edge diameter is not more than incoming flow tube inside diameter to the inside diameter of pipe that the connecting pipe inner chamber correspondence is located between step face and the ripple section increases along the fluid flow direction gradually. The utility model discloses because the connecting pipe interlude is the ripple section, therefore the whole length of connecting pipe can be adjusted, when having solved among the prior art when the leakage appears in the middle of the connection between indirect pipe and the oil transportation passageway, it is inconvenient to take over in the middle of dismantling, appears unable demolising even and can't install the technical problem of taking over in the middle of new, has played the function of convenient maintenance or change connecting pipe.

Description

Leakage-proof device for pipeline connection

Technical Field

The utility model relates to a pipe connection technical field especially relates to a pipe connection leak protection device.

Background

The steam turbine is used as important auxiliary equipment of a power plant generator set, the rotating speed of a water feeding pump is adjusted through the steam inlet quantity of a control machine, the normal water level of a boiler drum is maintained, the fault of a steam turbine rotating speed control system can cause an automatic adjusting system to be unstable, hidden danger is brought to long-term safe operation of the generator set, and the leakage at the pipeline connection part is found to be one of the most important reasons for causing the fault of the steam turbine rotating speed control system through detection.

The existing oil pump pipeline is generally a steel pipe and is connected into a long-distance pipeline by welding and flange connecting devices; at present, a traditional chinese patent with publication number CN211203215U discloses a leakage-proof device for an oil extraction pipeline of an oil field, and specifically discloses an intermediate connection pipe, wherein the left side of the intermediate connection pipe is communicated with a second oil through pipe, an inner cavity of the second oil through pipe is provided with a second oil transportation channel, and the right side of the intermediate connection pipe is communicated with a first oil through pipe; and a third oil delivery channel is formed in the inner cavity of the middle connecting pipe, and the inner wall of the third oil delivery channel is fixedly connected with a lining pipe. Although the device can improve the leakage-proof function by the labyrinth structure sealing structure, the device still has at least one of the following defects: 1. the oil transportation channels at the two ends of the middle connecting pipe are required to be inserted into the middle connecting pipe, so that the middle connecting pipe cannot move, and therefore when the connection between the middle connecting pipe and the oil transportation channel leaks, the middle connecting pipe is inconvenient to disassemble, and even a new middle connecting pipe cannot be disassembled and installed; 2. because the inside lining pipe that is equipped with of middle takeover, when leading to whole oil circuit to get into the lining intraductal, the oil circuit cross-section reduces suddenly, and then leads to lining pipe atress unbalance, breaks down easily, and then leads to leaking.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pipe connection leak protection device for solving the above problems.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a pipeline connection leakage-proof device comprises an incoming flow pipe, a flow removal pipe and a connecting pipe, wherein the middle section of the connecting pipe is a corrugated section, a step surface which is in sealing fit with the end face of the pipe end of the incoming flow pipe is arranged on the inner wall of one end part of the connecting pipe corresponding to the incoming flow pipe, the diameter of the inner edge of the step surface is not larger than the inner diameter of the incoming flow pipe, and the inner diameter of the pipe, corresponding to the position between the step surface and the corrugated section, of the connecting pipe is gradually increased along the flowing direction of fluid; an annular slot which is in plug-in fit with the end face of the flow removing pipe is arranged on one end face, corresponding to the flow removing pipe, of the connecting pipe, and the end face of the flow removing pipe is in sealing fit with the bottom of the annular slot;

the connecting pipe body both ends all are equipped with first ring flange, come the flow tube and go the flow tube body all sealed be equipped with the first ring flange seal complex second ring flange that corresponds, and the second ring flange outer fringe portion corresponds with the first ring flange outer fringe portion that corresponds and is connected through the bolt.

Preferably, the step surface is in sealing fit with the end surface of the pipe opening end of the incoming flow pipe, the end surface of the pipe opening end of the outgoing flow pipe is in sealing fit with the bottom of the annular slot groove, and the second flange plate is in sealing fit with the corresponding first flange plate through a sealing structure.

Preferably, still include the open annular cover in the inside edge portion, the inside wall of annular cover open end both ends is laminated in the second ring flange respectively and is discoid mutually with the diskehand quotation of the first ring flange that corresponds.

Preferably, the inner walls of the two end parts of the opening end of the annular cover are in sealing fit with the corresponding disk surfaces of the flange plates through sealing structures.

Preferably, magnets capable of being adsorbed to corresponding flange plate surfaces are embedded in the two end parts of the opening end of the annular cover.

Preferably, the annular cover is embedded with an arc-shaped elastic sheet capable of expanding radially along the axial direction.

Preferably, the bottom of the annular cover is provided with a through hole, and the through hole cavity is hermetically connected with a detection piece for detecting whether fluid exists in the inner cavity of the annular cover.

Preferably, the annular cover is further provided with a connecting port, and the connecting port is connected with an oil storage piece in a sealing mode.

Preferably, the bolts connecting the two corresponding flanges are located in the inner cavity of the corresponding annular cover.

Preferably, the pipe body of the incoming flow pipe is correspondingly attached to the inner wall of the connecting pipe; the inner wall and the outer wall of the pipe orifice of the flow removal pipe are correspondingly attached to the groove walls of the corresponding annular slots respectively.

Has the advantages that:

1. the middle section of the connecting pipe is a corrugated section, so that the whole length of the connecting pipe can be adjusted, the technical problems that the middle connecting pipe is inconvenient to disassemble and even a new middle connecting pipe cannot be disassembled and installed when the connection between the middle connecting pipe and the oil transportation channel leaks in the prior art are solved, and the function of conveniently maintaining or replacing the connecting pipe is achieved;

2. the diameter of the inner edge of the step surface is not larger than the inner diameter of the incoming flow pipe, and the inner diameter of the connecting pipe, which corresponds to the pipe between the step surface and the corrugated section, is gradually increased along the flowing direction of the fluid, so that the fluid enters the connecting pipe, the pressure of the fluid is firstly reduced, and then the corrugated section with the buffering capacity is impacted, thereby solving the technical problems that the stress of the lining pipe is unbalanced, the fault is easy to occur and the leakage is caused when the oil way enters the lining pipe in the prior art, and playing a role in preventing the fault from easily occurring between the connecting pipe and the incoming flow pipe and further causing the leakage;

3. due to the arrangement of the annular cover, when the connection pipe is matched with the inflow pipe or the outflow pipe to cause leakage, the fluid can be shielded and collected through the annular cover, so that the leaked fluid is prevented from impacting the surrounding environment, and the surrounding environment is prevented from being polluted;

4. because the setting of detection piece, can detect out whether the connecting pipe appears leaking with coming between the flow pipe, going the flow pipe, realize reminding the staff to maintain it or cooperate the equipment that corresponds for the pipeline stop work is of value to and has reduced potential safety hazard and loss.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is an enlarged partial cross-sectional view of I of FIG. 2;

fig. 4 is an enlarged partial sectional view II of fig. 2.

The reference numerals are explained below:

1. an incoming flow pipe; 2. a flow removal pipe; 3. a connecting pipe; 31. a step surface; 32. an annular slot; 33. a first flange plate; 4. a second flange plate; 5. an annular shroud; 51. a magnet; 52. an arc-shaped elastic sheet; 53. a detection member; 54. an oil storage member.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In a first embodiment, as shown in fig. 1 to 4, a pipeline connection leakage-proof device includes an incoming flow pipe 1, a outgoing flow pipe 2, and a connection pipe 3, where the middle section of the connection pipe 3 is a corrugated section, a step surface 31 hermetically fitted with the end surface of the pipe opening end of the incoming flow pipe 1 is disposed on the inner wall of one end part of the connection pipe 3 corresponding to the incoming flow pipe 1, the diameter of the inner edge of the step surface 31 is not greater than the pipe inner diameter of the incoming flow pipe 1, and the pipe inner diameter of the inner cavity of the connection pipe 3 corresponding to the position between the step surface 31 and the corrugated section is gradually increased along the fluid flowing direction; an annular slot 32 which is in plug-in fit with the pipe orifice end of the flow removal pipe 2 is arranged on one end face, corresponding to the flow removal pipe 2, of the connecting pipe 3, and the end face of the pipe orifice end of the flow removal pipe 2 is in sealing fit with the bottom of the annular slot 32;

the two ends of the pipe body of the connecting pipe 3 are respectively provided with a first flange plate 33, the pipe bodies of the inflow pipe 1 and the outflow pipe 2 are respectively provided with a second flange plate 4 which is in sealing fit with the corresponding first flange plate 33, and the outer edge part of the second flange plate 4 is correspondingly connected with the outer edge part of the corresponding first flange plate 33 through bolts;

due to the fact that the middle section of the connecting pipe 3 is the corrugated section, the whole length of the connecting pipe 3 can be adjusted, the technical problems that in the prior art, when the connection between the middle connecting pipe and the oil transportation channel leaks, the middle connecting pipe is inconvenient to disassemble, even the middle connecting pipe cannot be disassembled and a new middle connecting pipe cannot be installed are solved, and the function of facilitating maintenance or replacement of the connecting pipe 3 is achieved;

because the diameter of the inner edge of the step surface 31 is not larger than the inner diameter of the inflow pipe 1, and the inner diameter of the pipe, which corresponds to the position between the step surface 31 and the corrugated section, of the inner cavity of the connecting pipe 3 is gradually increased along the flowing direction of the fluid, so that the fluid enters the connecting pipe 3, the pressure of the fluid is firstly reduced, and then the corrugated section with the buffering capacity is impacted, the technical problems that the stress of the lining pipe is unbalanced, the fault is easy to occur and the leakage is caused due to the sudden reduction of the section of the oil path when the oil path enters the lining pipe in the prior art are solved, and the technical problem that the fault is easy to occur and the leakage is caused between the connecting pipe 3 and the inflow pipe 1 is prevented, so that the leakage is caused is achieved;

the leakage-proof device adopts a labyrinth seal structure at the same time, which is beneficial to preventing fluid leakage.

According to the needs, the step surface 31 and the end surface of the pipe opening end of the inflow pipe 1, the end surface of the pipe opening end of the outflow pipe 2 and the bottom of the annular slot 32, and the second flange plate 4 and the corresponding first flange plate 33 are in sealing fit through a sealing structure, preferably, the sealing structure is a sealing gasket.

In the second embodiment, on the basis of the first embodiment, as shown in fig. 1 to 4, the flange further includes an annular cover 5 with an open inner edge, and inner walls of two end portions of the open end of the annular cover 5 are respectively attached to the opposite disk surfaces of the second flange 4 and the corresponding first flange 33;

due to the arrangement of the annular cover 5, when leakage occurs due to the matching of the connecting pipe 3 and the inflow pipe 1 or the outflow pipe 2, the fluid can be shielded and collected through the annular cover 5, and the leaked fluid is prevented from impacting the surrounding environment, so that the surrounding environment is prevented from being polluted; particularly, when the fluid is oil, a large amount of oil can be prevented from being adhered to the ground, the wall surface or other equipment in the surrounding environment, for example, when the leakage-proof device is applied to an oil circuit for a steam turbine, a large amount of oil can be prevented from being adhered to a steam turbine tower body or a pipeline;

according to the requirement, the annular cover 5 is made of elastic material;

according to the requirement, the inner walls of the two end parts of the opening end of the annular cover 5 are in sealing fit with the corresponding disc surfaces of the flange plates through sealing structures.

Magnets 51 which can be adsorbed on the corresponding flange disc surfaces are embedded in the two end parts of the opening end of the annular cover 5 according to requirements;

this arrangement increases the stability of the mounting of the annular shroud 5;

according to the requirement, the arc-shaped elastic sheet 52 which can be radially expanded is embedded in the annular cover 5 along the axial direction, so that the stability of the appearance structure of the annular cover 5 can be improved;

and bolts for connecting the two corresponding flanges are positioned in the inner cavities of the corresponding annular covers 5 as required.

In the third embodiment, on the basis of the second embodiment, as shown in fig. 1, the bottom of the annular cover 5 is provided with a through hole, and the through hole cavity is hermetically connected with a detecting piece 53 for detecting whether a fluid exists in the inner cavity of the annular cover 5;

according to the requirement, the detection piece 53 is a hydraulic sensor, and the hydraulic sensor is in signal connection with a control system of the steam turbine according to the requirement, so that when the detection piece 53 monitors that oil exists in the inner cavity of the annular cover 5, the oil leakage of the anti-leakage device is indicated, and the detection piece 53 transmits the signal to the control system of the steam turbine, so that the control system of the steam turbine controls the steam turbine to stop or give an alarm;

the detecting member 53 is a liquid sensor and an alarm, if necessary, so that when the detecting member 53 detects the presence of oil in the cavity of the annular housing 5, indicating that the leak-proof device is leaking oil, the detecting member 53 transmits the signal to the alarm, so that the alarm gives an alarm.

The annular cover 5 is also provided with a connection port, as required, which is hermetically connected with an oil reservoir 54;

preferably, the reservoir 54 is a bladder;

the connection port is also located at the bottom of the annular cover 5 as required, and the oil reservoir 54 is of a housing structure having an inner cavity as required.

In the fourth embodiment, on the basis of the first embodiment, as shown in fig. 1 to 4, the pipe body of the inflow pipe 1 is correspondingly attached to the inner wall of the connecting pipe 3; the inner wall and the outer wall of the pipe orifice of the flow removing pipe 2 are correspondingly attached to the groove walls of the corresponding annular slots 32 respectively;

this arrangement increases the sealing performance between the connection pipe 3 and the inflow pipe 1 and the outflow pipe 2.

The foregoing illustrates and describes the general principles, features and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pipe connection leak protection device, is including coming flow tube (1), go flow tube (2), its characterized in that: the connecting pipe is characterized by further comprising a connecting pipe (3), the middle section of the connecting pipe (3) is a corrugated section, a step surface (31) which is in sealing fit with the end face of the pipe opening end of the inflow pipe (1) is arranged on the inner wall of one end part of the connecting pipe (3) corresponding to the inflow pipe (1), the diameter of the inner edge of the step surface (31) is not larger than the inner diameter of the inflow pipe (1), and the inner diameter of the pipe, which is positioned between the step surface (31) and the corrugated section, of the inner cavity of the connecting pipe (3) is gradually increased along the flowing direction of fluid; an annular slot (32) which is in plug fit with the pipe orifice end of the flow removal pipe (2) is formed in one end face, corresponding to the flow removal pipe (2), of the connecting pipe (3), and the end face of the pipe orifice end of the flow removal pipe (2) is in sealing fit with the bottom of the annular slot (32);

connecting pipe (3) shaft both ends all are equipped with first ring flange (33), come to flow pipe (1) and go to flow pipe (2) shaft all sealed be equipped with the sealed complex second ring flange (4) of first ring flange (33) that correspond, and second ring flange (4) outer fringe portion corresponds the connection with the first ring flange (33) outer fringe portion that corresponds through the bolt.

2. The anti-leakage device for pipe connection according to claim 1, wherein: the step surface (31) is in sealing fit with the end surface of the pipe opening end of the incoming flow pipe (1), the end surface of the pipe opening end of the outgoing flow pipe (2) is in sealing fit with the bottom of the annular slot (32), and the second flange plate (4) is in sealing fit with the corresponding first flange plate (33) through a sealing structure.

3. The anti-leakage device for pipe connection according to claim 1, wherein: the novel flange plate is characterized by further comprising an annular cover (5) with an opening in the inner edge, and the inner walls of the two end parts of the opening end of the annular cover (5) are respectively attached to the back of the second flange plate (4) and the corresponding first flange plate (33).

4. The anti-leakage device for pipe connection according to claim 3, wherein: and the inner walls of the two end parts of the opening end of the annular cover (5) are in sealing fit with the corresponding disc surfaces of the flange discs through sealing structures.

5. The anti-leakage device for pipe connection according to claim 3, wherein: magnets (51) capable of being adsorbed to the corresponding flange plate surfaces are embedded in the two end parts of the opening end of the annular cover (5).

6. The anti-leakage device for pipe connection according to claim 3, wherein: the annular cover (5) is embedded with an arc-shaped elastic sheet (52) which can be radially expanded along the axial direction.

7. The anti-leakage device for pipe connection according to claim 3, wherein: the bottom of the annular cover (5) is provided with a through hole, and the through hole cavity is hermetically connected with a detection piece (53) for detecting whether the fluid exists in the inner cavity of the annular cover (5).

8. The anti-leakage device for pipe connection according to claim 3, wherein: the annular cover (5) is also provided with a connecting port, and the connecting port is hermetically connected with an oil storage part (54).

9. The anti-leakage device for pipe connection according to claim 3, wherein: the bolts connecting the two corresponding flanges are positioned in the inner cavity of the corresponding annular cover (5).

10. The anti-leakage device for pipe connection according to claim 1, wherein: the pipe body of the inflow pipe (1) is correspondingly attached to the inner wall of the connecting pipe (3); the inner wall and the outer wall of the pipe orifice of the flow removing pipe (2) are correspondingly attached to the corresponding groove walls of the annular slots (32).