CN113586831A - Leakage-proof sealing device for pipeline expansion joint - Google Patents
Leakage-proof sealing device for pipeline expansion joint Download PDFInfo
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- CN113586831A CN113586831A CN202110671519.2A CN202110671519A CN113586831A CN 113586831 A CN113586831 A CN 113586831A CN 202110671519 A CN202110671519 A CN 202110671519A CN 113586831 A CN113586831 A CN 113586831A
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- Prior art keywords
- sealing
- pipe
- expansion joint
- ring
- sleeve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
- F16L51/025—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube with several corrugations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/62—Couplings of the quick-acting type pneumatically or hydraulically actuated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/168—Devices for covering leaks in pipes or hoses, e.g. hose-menders from outside the pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/179—Devices for covering leaks in pipes or hoses, e.g. hose-menders specially adapted for bends, branch units, branching pipes or the like
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
Abstract
The invention relates to the technical field of conveying equipment, in particular to a leakage-proof sealing device for a pipeline expansion joint, which comprises an expansion joint body and a sealing mechanism, wherein the expansion joint body is provided with a sealing ring; the expansion joint body comprises a corrugated pipe, connecting rings are arranged at two ends of the corrugated pipe, an auxiliary pipe is arranged on the connecting rings, connecting flanges are arranged at the outer ends of the auxiliary pipe, the corrugated pipe, the connecting rings, the auxiliary pipe and the connecting flanges are communicated with one another, a quick-mounting mechanism is arranged on the connecting flanges, a plurality of connecting rods are uniformly arranged between the two connecting flanges, and the two connecting flanges are connected through the connecting rods; the sealing mechanism comprises two fixing rings arranged on the outer walls of the two auxiliary pipes, wherein first sealing sleeves are arranged on the fixing rings and positioned between the two fixing rings; the bellows through the leakage state carries out sealing treatment, effectively avoids the fluid of pipeline transport to take place to reveal in a large number, reduces the wasting of resources, improves the practicality.
Description
Technical Field
The invention relates to the technical field of conveying equipment, in particular to a leakage-proof sealing device for a pipeline expansion joint.
Background
As is known, an expansion joint is a common connection device for pipeline conveying fluid, deformation or stress is generated on a pipeline due to temperature difference or vibration phenomena of the pipeline, the pipeline is compensated through the expansion joint, so that the stress or deformation of the pipeline is counteracted, and a slow release effect is achieved.
Disclosure of Invention
In order to solve the technical problem, the invention provides a leakage-proof sealing device for a pipeline expansion joint.
In order to achieve the purpose, the invention adopts the technical scheme that:
the pipeline expansion joint leakage-proof sealing device comprises an expansion joint body and a sealing mechanism;
the expansion joint body comprises a corrugated pipe, connecting rings are arranged at two ends of the corrugated pipe, an auxiliary pipe is arranged on the connecting rings, connecting flanges are arranged at the outer ends of the auxiliary pipe, the corrugated pipe, the connecting rings, the auxiliary pipe and the connecting flanges are communicated with one another, a quick-mounting mechanism is arranged on the connecting flanges, a plurality of connecting rods are uniformly arranged between the two connecting flanges, and the two connecting flanges are connected through the connecting rods;
the sealing mechanism comprises two fixing rings arranged on the outer walls of the two auxiliary pipes, a first sealing sleeve is arranged on each fixing ring, the two first sealing sleeves are positioned between the two fixing rings, a second sealing sleeve is hermetically sleeved on the upper sealing sleeve of each first sealing sleeve, the diameters of the two second sealing sleeves are different, and a plurality of sealing rings are arranged on the outer wall of one second sealing sleeve and the inner wall of the other second sealing sleeve;
and one of the two auxiliary pipes positioned on the input side is provided with a pushing mechanism, the output end of the pushing mechanism is connected with the adjacent second sealing sleeves, and a synchronizing mechanism is arranged between the two second sealing sleeves.
Further, the cross section of the sealing ring is in a herringbone shape, and the sealing ring on the second sealing sleeve is inverted towards the direction of the other second sealing sleeve.
Furthermore, the quick-assembly mechanism comprises a fixed sleeve arranged on the outer side wall of the connecting flange plate, threads are uniformly arranged on the circumferential inner wall of the fixed sleeve, an external thread ring is arranged in the fixed sleeve in a threaded manner, and a plurality of plate springs are uniformly arranged on the side wall of the external thread ring;
a plurality of support shafts are uniformly distributed in the connecting flange plate in an annular shape, the direction of each support shaft is along the axis direction of the connecting flange plate, a moving sleeve is slidably sleeved on each support shaft, a telescopic rod and a clamping plate are arranged on the side wall of each moving sleeve, the positions of the telescopic rods and the clamping plates are symmetrical, the clamping plates are arranged along the radial direction of the connecting flange plate, the outer sides or the top ends of the telescopic rods are rotatably arranged on the inner wall of the circumference of the external thread ring, the side wall of each clamping plate, facing the direction of the connecting flange plate, is provided with an inclined surface, and a pushing cylinder is obliquely and rotatably arranged on the inclined surface of each clamping plate;
the outer end opening position spiral-lock of fixed cover has a seal ring, seal ring passes through bolt and fixed cover fixed connection, the outer end of back shaft with the outer end of cardboard all contacts with the lateral wall of seal ring.
Furthermore, be annular evenly distributed and have a plurality of arc deflector on the lateral wall of flange plate, the outer end of arc deflector passes seal ring middle part and stretches out to the outside of seal ring, the outer end slope of arc deflector.
Furthermore, the pushing mechanism comprises a plurality of groups of cylinder push rods, the cylinder push rods are arranged on a fixing ring on the outer wall of the auxiliary pipe on the input side, and the movable ends of the cylinder push rods penetrate through the fixing ring and are connected with the end parts of the adjacent second sealing sleeves;
the fixed end of the cylinder push rod is communicated with a guide pipe, the input end of the guide pipe is communicated with the auxiliary pipe, and the guide pipe is provided with an electromagnetic switch valve.
Furthermore, the synchronizing mechanism comprises a plurality of lead screws positioned on the outer side of the corrugated pipe, the lead screws are uniformly distributed in an annular shape, two ends of each lead screw are rotatably installed on the two connecting flange plates, and the rotating directions of the threads on the left side and the right side of the circumferential outer wall of each lead screw are opposite;
and a plurality of pushing plates are uniformly arranged on the outer wall of each second sealing sleeve, and the lead screw penetrates through the pushing plates and is in screwed connection.
Furthermore, pressure gauges are arranged on the two auxiliary pipes, a central control box is arranged on the side wall of one connecting flange plate, and the electromagnetic switch valve and the pressure gauges are in signal connection with the central control box.
Furthermore, the middle part of the lead screw is provided with a limiting sleeve.
Compared with the prior art, the invention has the beneficial effects that: fluid in the external pipeline passes through the bellows, the go-between, auxiliary pipe and flange plate flow, deformation or stress that the auxiliary pipe produced when carrying fluid to external pipeline compensate, when the auxiliary pipe takes place to leak, pushing mechanism promotes the second seal cover on it and removes, this second seal cover passes through synchronous mechanism and drives another second seal cover synchronous motion, two second seal covers are close to each other, because there is the difference in two second seal cover diameters, two mutual suit plug-in connections of second seal cover, a plurality of sealing washers carry out sealing process to the gap between two second seal covers, thereby through solid fixed ring, first seal cover, the bellows of second seal cover and sealing washer to the leakage state carries out sealing process, effectively avoid the fluid of pipeline to take place a large amount of leakages, reduce the wasting of resources, and improve the practicality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the body of the expansion joint of FIG. 1;
FIG. 3 is a schematic cross-sectional structural view of the present invention;
FIG. 4 is a schematic cross-sectional view of the inside of the seal ring of FIG. 1;
FIG. 5 is an enlarged view of a portion A of FIG. 3;
FIG. 6 is an enlarged view of a portion B of FIG. 3;
FIG. 7 is an enlarged view of a portion of the structure of FIG. 5 at C;
in the drawings, the reference numbers: 1. a bellows; 2. a connecting ring; 3. a secondary pipe; 4. connecting a flange plate; 5. a fixing ring; 6. a first seal cartridge; 7. a second seal cartridge; 8. a seal ring; 9. fixing a sleeve; 10. an externally threaded ring; 11. a plate spring; 12. a support shaft; 13. moving the sleeve; 14. a telescopic rod; 15. clamping a plate; 16. pushing the cylinder; 17. sealing a ring; 18. an arc-shaped guide plate; 19. a cylinder push rod; 20. a conduit; 21. an electromagnetic on-off valve; 22. a lead screw; 23. a push plate; 24. a central control box; 25. a limiting sleeve; 26. a connecting rod; 27. and a pressure gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. This embodiment is written in a progressive manner.
As shown in fig. 1 to 7, the pipe expansion joint leakage-proof sealing device of the invention comprises an expansion joint body and a sealing mechanism;
the expansion joint body comprises a corrugated pipe 1, connecting rings 2 are arranged at two ends of the corrugated pipe 1, an auxiliary pipe 3 is arranged on the connecting rings 2, a connecting flange plate 4 is arranged at the outer end of the auxiliary pipe 3, the corrugated pipe 1, the connecting rings 2, the auxiliary pipe 3 and the connecting flange plate 4 are communicated with each other, a quick-assembling mechanism is arranged on the connecting flange plate 4, a plurality of connecting rods 26 are uniformly arranged between the two connecting flange plates 4, and the two connecting flange plates 4 are connected through the connecting rods 26;
the sealing mechanism comprises two fixing rings 5 arranged on the outer walls of the two auxiliary pipes 3, a first sealing sleeve 6 is arranged on each fixing ring 5, the two first sealing sleeves 6 are positioned between the two fixing rings 5, second sealing sleeves 7 are arranged on the upper sealing sleeves of the first sealing sleeves 6 in a sealing mode, the diameters of the two second sealing sleeves 7 are different, and a plurality of sealing rings 8 are arranged on the outer wall of one second sealing sleeve 7 and the inner wall of the other second sealing sleeve 7;
and one auxiliary pipe 3 positioned on the input side of the two auxiliary pipes 3 is provided with a pushing mechanism, the output end of the pushing mechanism is connected with the adjacent second sealing sleeves 7, and a synchronizing mechanism is arranged between the two second sealing sleeves 7.
In the embodiment, fluid in an external pipeline flows through the corrugated pipe 1, the connecting ring 2, the auxiliary pipe 3 and the connecting flange 4, the auxiliary pipe 3 compensates deformation or stress generated when the external pipeline conveys the fluid, when the auxiliary pipe 3 leaks, the pushing mechanism pushes the second sealing sleeves 7 on the auxiliary pipe to move, the second sealing sleeves 7 drive the other second sealing sleeves 7 to synchronously move through the synchronizing mechanism, the two second sealing sleeves 7 are close to each other, because the diameters of the two second sealing sleeves 7 are different, the two second sealing sleeves 7 are mutually sleeved and connected in an inserting way, a plurality of sealing rings 8 perform sealing treatment on gaps between the two second sealing sleeves 7, so that the corrugated pipe 1 in a leakage state is sealed through the fixing ring 5, the first sealing sleeve 6, the second sealing sleeves 7 and the sealing rings 8, and a large amount of fluid conveyed by the pipeline is effectively avoided from leaking, reduce the wasting of resources, improve the practicality.
As a preferable aspect of the above embodiment, the cross-sectional shape of the seal ring 8 is a chevron shape, and the seal ring 8 on the second seal boot 7 is inverted toward the other second seal boot 7.
In this embodiment, the section of the sealing ring 8 is designed into a herringbone shape and is inverted, so that the sealing rings 8 on the two second sealing sleeves 7 can be conveniently inserted into each other, the sealing rings 8 on the two second sealing sleeves 7 can be smoothly inserted into each other, the two second sealing sleeves 7 can be conveniently inserted into each other, and meanwhile, when the auxiliary pipe 3 leaks, fluid enters between the two second sealing sleeves 7 and generates thrust to the sealing ring 8, because the section of the sealing ring 8 is in a herringbone shape, when the sealing ring 8 receives the thrust of the fluid, the sealing ring 8 is in an open state and is tightly attached to the side wall of the second sealing sleeve 7, so that the sealing ring 8 can tightly seal a gap between the two second sealing sleeves 7, and the sealing effect of the sealing ring is improved.
Preferably, the quick-assembly mechanism comprises a fixed sleeve 9 mounted on the outer side wall of the connecting flange 4, threads are uniformly arranged on the circumferential inner wall of the fixed sleeve 9, an external thread ring 10 is arranged in the fixed sleeve 9 in a threaded manner, and a plurality of plate springs 11 are uniformly arranged on the side wall of the external thread ring 10;
a plurality of support shafts 12 are uniformly distributed in the connecting flange plate 4 in an annular shape, the direction of each support shaft 12 is along the axial direction of the connecting flange plate 4, a moving sleeve 13 is slidably sleeved on each support shaft 12, a telescopic rod 14 and a clamping plate 15 are arranged on the side wall of each moving sleeve 13, the positions of the telescopic rod 14 and the clamping plate 15 are symmetrical, the clamping plate 15 is arranged along the radial direction of the connecting flange plate 4, the outer side or the top end of the telescopic rod 14 is rotatably installed on the inner wall of the circumference of the external thread ring 10, the side wall of the clamping plate 15 facing the direction of the connecting flange plate 4 is an inclined surface, and a pushing cylinder 16 is obliquely and rotatably arranged on the inclined surface of the clamping plate 15;
the outer end opening position spiral-lock of fixed cover 9 has a seal ring 17, seal ring 17 passes through bolt and fixed cover 9 fixed connection, the outer end of back shaft 12 with the outer end of cardboard 15 all contacts with the lateral wall of seal ring 17.
In this embodiment, when the expansion joint is connected to an external pipeline, the flange on the external pipeline is pushed into the fixing sleeve 9 through the opening in the middle of the sealing ring 17, at this time, the flange on the pipeline contacts with the outer end of the clamping plate 15 and generates thrust on the clamping plate 15, the clamping plate 15 drives the moving sleeve 13 to slide towards the direction of the connecting flange 4 on the supporting shaft 12, the moving sleeve 13 drives the external thread ring 10 to move towards the direction of the connecting flange 4 through the telescopic rod 14, because the fixing sleeve 9 is screwed with the external thread ring 10, the external thread ring 10 rotates in the fixing sleeve 9, the external thread ring 10 drives the plate spring 11 to elastically deform, the external thread ring 10 drives the moving sleeve 13 to synchronously rotate through the telescopic rod 14, the moving sleeve 13 drives the clamping plate 15 to tilt, the clamping plate 15 is gradually separated from the flange on the pipeline, when the clamping plate 15 is separated from the flange on the pipeline, the flange on the pipeline bypasses the clamping plate 15 to move towards the direction of the connecting flange 4 and contacts with the side wall of the connecting flange 4, leaf spring 11 promotes external screw thread ring 10 antiport, cardboard 15 rotates gradually to initial condition, the contact of ring flange on promotion cylinder 16 on the cardboard 15 and the pipeline, because promote the slope of cylinder 16, promote cylinder 16 and produce the slope thrust to the ring flange on the pipeline, thereby make the pipeline and connect flange 4 to paste tightly, realize the fast-assembling work of pipeline, the pipeline is in the connected state with connecting flange 4 this moment, simultaneously because the outer end of cardboard 15 contacts with the lateral wall of seal ring 17 again, seal ring 17 carries out limit treatment to cardboard 15, thereby carry on spacingly to the turned position of external screw thread ring 10, promotion cylinder 16 on the cardboard 15 contacts with the ring flange on the pipeline this moment, the outer end of cardboard 15 contacts with the lateral wall of seal ring 17, thereby extrude fixed processing through cardboard 15 and promotion cylinder 16 to the ring flange on the pipeline.
In this embodiment, when the pipeline needs to be separated from the connecting flange 4, the seal ring 17 is removed, the clamp plate 15 is moved in the reverse direction and rotates in an inclined manner, the clamp plate 15 moves in the direction away from the connecting flange 4 at this time, the clamp plate 15 is inclined, and the clamp plate 15 stops the extrusion fixing work on the pipeline flange, so that the pipeline can be quickly pulled out.
In this embodiment, when the external thread ring 10 rotates, the external thread ring 10 drives the telescopic rod 14 to tilt, and the telescopic rod 14 performs telescopic motion.
Preferably, a plurality of arc-shaped guide plates 18 are uniformly distributed on the side wall of the connecting flange plate 4 in an annular shape, the outer ends of the arc-shaped guide plates 18 penetrate through the middle of the seal ring 17 and extend out of the outer side of the seal ring 17, and the outer ends of the arc-shaped guide plates 18 are inclined.
In this embodiment, through setting up many arc deflector 18, can conveniently lead the processing to external pipeline flange to conveniently make pipeline and connection flange 4 carry out accurate butt joint, when avoiding pipeline and connection flange 4 slope dislocation, the phenomenon is leaked in the fluid emergence.
Preferably, the pushing mechanism comprises a plurality of groups of cylinder push rods 19, the cylinder push rods 19 are mounted on a fixing ring 5 on the outer wall of the auxiliary pipe 3 on the input side, and the movable ends of the cylinder push rods 19 penetrate through the fixing ring 5 and are connected with the end parts of the adjacent second sealing sleeves 7;
the fixed end of the cylinder push rod 19 is communicated with a guide pipe 20, the input end of the guide pipe 20 is communicated with the auxiliary pipe 3, and an electromagnetic switch valve 21 is arranged on the guide pipe 20.
In this embodiment, when the bellows 1 leaks, the electromagnetic switch valve 21 is opened, the fluid in the input-side auxiliary pipe 3 enters the cylinder push rod 19 through the conduit 20, and because the fluid pressure in the input-side auxiliary pipe 3 is relatively high, the fluid pushes the cylinder push rod 19 to perform an extension motion, and the movable end on the cylinder push rod 19 pushes the second sealing sleeves 7 thereon to move, thereby realizing the automatic butt-joint sealing operation of the two second sealing sleeves 7.
As a preference of the above embodiment, the synchronizing mechanism includes a plurality of lead screws 22 located outside the bellows 1, the plurality of lead screws 22 are uniformly distributed in an annular shape, two ends of the lead screws 22 are rotatably mounted on the two connecting flange plates 4, and the thread directions of the left and right sides of the circumferential outer wall of the lead screw 22 are opposite;
a plurality of pushing plates 23 are uniformly arranged on the outer wall of each second sealing sleeve 7, and the screw rod 22 penetrates through the pushing plates 23 and is connected in a threaded manner.
In this embodiment, because the pushing plate 23 is connected with the screw rod 22 in a threaded manner, when the second seal cartridge 7 close to the input side moves, the second seal cartridge 7 drives the screw rod 22 to rotate through the pushing plate 23 on the second seal cartridge 7, the screw rod 22 drives the pushing plates 23 on two second seal cartridges 7 to move, and because the thread turning directions of the left side and the right side on the screw rod 22 are opposite, the screw rod 22 pushes the two pushing plates 23 on the screw rod 22 to synchronously move relatively, so that the two second seal cartridges 7 are driven to synchronously move relatively.
Preferably, as the above embodiment, the two sub pipes 3 are provided with the pressure gauges 27, the side wall of one connecting flange 4 is provided with the central control box 24, and the electromagnetic switch valve 21 and the pressure gauge 27 are in signal connection with the central control box 24.
In this embodiment, can conveniently carry out real-time detection to the fluid flow pressure in two auxiliary pipes 3 through setting up two pressure gauges 27, when the detection pressure value of two pressure gauges 27 produced the difference, the leakage phenomenon appeared in auxiliary pipe 3, and well accuse case 24 control electromagnetic switch valve 21 opens to realize the automatic detection sealing work of expansion joint.
Preferably, the middle part of the screw rod 22 is provided with a limit sleeve 25.
In this embodiment, through setting up stop collar 25, can conveniently carry out spacing and location processing to two slurcam 23 relative movement positions on lead screw 22, when slurcam 23 and stop collar 25 contact, two second seal casings 7 all move to sealed position and mutual plug connection.
According to the leakage-proof sealing device for the expansion joint of the pipeline, the installation mode, the connection mode or the arrangement mode are common mechanical modes, and the leakage-proof sealing device can be implemented as long as the beneficial effects of the leakage-proof sealing device can be achieved; the electromagnetic opening/closing valve 21, the center control box 24 and the pressure gauge 27 are commercially available.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A pipeline expansion joint leakage-proof sealing device is characterized by comprising an expansion joint body and a sealing mechanism;
the expansion joint body comprises a corrugated pipe (1), connecting rings (2) are arranged at two ends of the corrugated pipe (1), an auxiliary pipe (3) is arranged on the connecting rings (2), a connecting flange (4) is arranged at the outer end of the auxiliary pipe (3), the corrugated pipe (1), the connecting rings (2), the auxiliary pipe (3) and the connecting flange (4) are communicated with each other, a quick-assembling mechanism is arranged on the connecting flange (4), a plurality of connecting rods (26) are uniformly arranged between the two connecting flanges (4), and the two connecting flanges (4) are connected through the connecting rods (26);
the sealing mechanism comprises two fixing rings (5) arranged on the outer walls of the two auxiliary pipes (3), a first sealing sleeve (6) is arranged on each fixing ring (5), the two first sealing sleeves (6) are positioned between the two fixing rings (5), a second sealing sleeve (7) is hermetically sleeved on each first sealing sleeve (6), the diameters of the two second sealing sleeves (7) are different, and a plurality of sealing rings (8) are arranged on the outer wall of one second sealing sleeve (7) and the inner wall of the other second sealing sleeve (7);
a pushing mechanism is arranged on one auxiliary pipe (3) located on the input side of the two auxiliary pipes (3), the output end of the pushing mechanism is connected with the adjacent second sealing sleeves (7), and a synchronizing mechanism is arranged between the two second sealing sleeves (7).
2. A leak-proof sealing device for a pipe expansion joint, according to claim 1, characterized in that the cross-section of the sealing ring (8) is a herringbone, and the sealing ring (8) on the second sealing sleeve (7) is inverted towards the other second sealing sleeve (7).
3. A leak-proof sealing device for a pipe expansion joint according to claim 2, wherein the quick-mounting mechanism comprises a fixing sleeve (9) mounted on the outer side wall of the connecting flange (4), the inner circumferential wall of the fixing sleeve (9) is uniformly provided with threads, an external thread ring (10) is screwed in the fixing sleeve (9), and the side wall of the external thread ring (10) is uniformly provided with a plurality of plate springs (11);
a plurality of support shafts (12) are uniformly distributed in the connecting flange plate (4) in an annular manner, the direction of each support shaft (12) is along the axis direction of the connecting flange plate (4), a moving sleeve (13) is slidably sleeved on each support shaft (12), a telescopic rod (14) and a clamping plate (15) are arranged on the side wall of each moving sleeve (13), the positions of the telescopic rod (14) and the clamping plate (15) are symmetrical, the clamping plate (15) is along the radial direction of the connecting flange plate (4), the outer side or the top end of each telescopic rod (14) is rotatably arranged on the inner wall of the circumference of the external thread ring (10), the side wall of each clamping plate (15) facing the direction of the connecting flange plate (4) is provided with an inclined surface, and a pushing cylinder (16) is obliquely and rotatably arranged on the inclined surface of the clamping plate (15);
the outer end opening position spiral-lock of fixed cover (9) is equipped with seal ring (17), seal ring (17) pass through bolt and fixed cover (9) fixed connection, the outer end of back shaft (12) with the outer end of cardboard (15) all contacts with the lateral wall of seal ring (17).
4. A leak-proof sealing device for expansion joint of pipeline according to claim 3, wherein a plurality of arc-shaped guiding plates (18) are uniformly distributed on the side wall of the connecting flange (4) in a ring shape, the outer ends of the arc-shaped guiding plates (18) pass through the middle of the seal ring (17) and extend to the outer side of the seal ring (17), and the outer ends of the arc-shaped guiding plates (18) are inclined.
5. A leakproof sealing device for a pipe expansion joint according to claim 4, characterized in that the pushing mechanism comprises a plurality of groups of cylinder push rods (19), the cylinder push rods (19) are arranged on a fixing ring (5) on the outer wall of the auxiliary pipe (3) at the input side, and the movable ends of the cylinder push rods (19) pass through the fixing ring (5) and are connected with the end part of the adjacent second sealing sleeve (7);
the fixed end intercommunication of cylinder push rod (19) is provided with pipe (20), the input of pipe (20) with auxiliary pipe (3) intercommunication, be provided with electromagnetic switch valve (21) on pipe (20).
6. A leakproof sealing device for a pipe expansion joint according to claim 5, wherein the synchronizing mechanism comprises a plurality of lead screws (22) which are positioned outside the corrugated pipe (1), the plurality of lead screws (22) are uniformly distributed in an annular shape, two ends of each lead screw (22) are rotatably mounted on the two connecting flanges (4), and the threads on the left side and the right side of the circumferential outer wall of each lead screw (22) are oppositely threaded;
a plurality of pushing plates (23) are uniformly arranged on the outer wall of each second sealing sleeve (7), and the lead screw (22) penetrates through the pushing plates (23) and is connected in a threaded manner.
7. A leak-proof sealing device for a pipe expansion joint, according to claim 6, characterized in that pressure gauges (27) are provided on both of the secondary pipes (3), a central control box (24) is provided on the side wall of one of the connecting flanges (4), and the electromagnetic switch valve (21) and the pressure gauges (27) are in signal connection with the central control box (24).
8. A leak-proof sealing device for a pipe expansion joint according to claim 7, wherein a stop collar (25) is provided in the middle of the screw (22).
Priority Applications (1)
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| CN114809975A (en) * | 2022-04-01 | 2022-07-29 | 阜宁县宏达石化机械有限公司 | Packer |
| CN115355382A (en) * | 2022-10-20 | 2022-11-18 | 华电宁德电力开发有限公司 | Pipeline connecting device stable in connection |
| CN117267501A (en) * | 2023-11-22 | 2023-12-22 | 江苏博格东进管道设备有限公司 | Anticorrosive bellows compensator |
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| CN117267501A (en) * | 2023-11-22 | 2023-12-22 | 江苏博格东进管道设备有限公司 | Anticorrosive bellows compensator |
| CN117267501B (en) * | 2023-11-22 | 2024-02-23 | 江苏博格东进管道设备有限公司 | Anticorrosive bellows compensator |
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| CN113586831B (en) | 2022-09-06 |
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