CN112923145A - Flange sealing device - Google Patents
Flange sealing device Download PDFInfo
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- CN112923145A CN112923145A CN201911239304.2A CN201911239304A CN112923145A CN 112923145 A CN112923145 A CN 112923145A CN 201911239304 A CN201911239304 A CN 201911239304A CN 112923145 A CN112923145 A CN 112923145A
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- groove
- annular
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- 238000007789 sealing Methods 0.000 title claims abstract description 315
- 239000004519 grease Substances 0.000 claims abstract description 207
- 238000002347 injection Methods 0.000 claims abstract description 65
- 239000007924 injection Substances 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000008569 process Effects 0.000 claims abstract description 33
- 230000009471 action Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 229910000831 Steel Inorganic materials 0.000 description 22
- 239000010959 steel Substances 0.000 description 22
- 239000000243 solution Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
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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
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention provides a flange sealing device, which is used on a process pipeline in an oil-gas station and comprises the following components: the annular sealing gasket is clamped between the two beveled flanges; the bevel flanges are provided with a first end and a second end, the first end is used for being connected with a pipeline, the second ends of the two bevel flanges are arranged oppositely, and the end faces of the second ends of the two bevel flanges are provided with annular sealing grooves capable of containing annular sealing gaskets; the groove flange is provided with a grease injection channel, the grease injection channel is provided with a grease inlet and a grease outlet, the grease inlet is communicated with the outside, a grease injection check valve is arranged at the grease inlet, the grease outlet is arranged between the annular sealing groove and the inner hole and is communicated with the joint of the annular sealing groove and the annular sealing gasket, so that sealing grease flowing out of the grease outlet flows to the joint under the thrust action of a medium in the pipeline to seal the joint. The invention can seal the joint under the condition that the process pipeline does not stop production so as to ensure the production efficiency.
Description
Technical Field
The invention relates to the field of oil and gas exploitation and transportation, in particular to a flange sealing device.
Background
In order to meet the requirement of controlling the flow of a medium in a process pipeline in an oil and gas station, control valves or other devices are generally arranged on different sections of the process pipeline, and the control valves or other devices are connected with the process pipeline through two bevel flanges in an abutting mode. Referring to fig. 1, in order to maintain good sealing performance and pressure-bearing capacity after the process pipeline is butted with a control valve or other devices through two bevel flanges, corresponding sealing grooves 112 are generally formed on the butting faces of the two bevel flanges 110, a sealing steel ring 120 is arranged between the two corresponding sealing grooves 112, and then the two bevel flanges 110 are fastened through fasteners 130 to press the sealing steel ring 120 so as to achieve sealing.
After the process pipeline is put into production, when the temperature or the pressure of the medium in the pipeline changes or the medium in the pipeline has strong corrosiveness, leakage or puncture can be generated at the sealing surface formed by the sealing steel ring and the sealing groove. In the prior art, when leakage or puncture occurs at a sealing surface formed by a sealing steel ring and a sealing groove, the sealing steel ring is further compressed in a fastening flange mode to recover sealing, and when the leakage or puncture cannot be eliminated by adopting a fastening method, the tightness of the sealing surface formed by the sealing groove and the sealing steel ring can be recovered only by replacing a flange sheet or the sealing steel ring.
However, when replacing the flange plate or the sealing steel ring, the pressure of the pipeline needs to be relieved, and even the operation procedures such as industrial fire driving and the like are needed, which can cause the production downtime of the process pipeline to be too long, and seriously affect the production efficiency of the process pipeline.
Disclosure of Invention
The invention provides a flange sealing device which can repair the sealing joint of a flange and recover the sealing property under the condition that a process pipeline is not stopped so as to ensure the production efficiency of the process pipeline.
The invention provides a flange sealing device, which is used on a process pipeline in an oil-gas station and comprises the following components: the sealing device comprises an annular sealing gasket and two oppositely arranged bevel flanges, wherein the annular sealing gasket is clamped between the two bevel flanges;
the groove flanges are provided with a first end and a second end, the first ends of the groove flanges are used for being connected with a pipeline, the second ends of the two groove flanges are arranged oppositely, the end faces of the second ends of the two groove flanges are provided with annular sealing grooves capable of containing the annular sealing gaskets, and the annular sealing grooves are arranged around the inner holes of the groove flanges;
be provided with on the groove flange and annotate the fat passageway, it has into fat mouth and play fat mouth to annotate the fat passageway, it communicates with the outside to go into the fat mouth, it is provided with notes fat single current valve to go into fat mouth department, it sets up to go out the fat mouth annular seal groove with between the hole, and with annular seal groove with the junction intercommunication of annular seal pad, so that follow the sealed fat that goes out the fat mouth outflow is in the thrust action of the medium in the pipeline flows to the junction, with sealed the junction.
In the flange sealing device as described above, optionally, the grease injection channel includes a first channel section and a second channel section;
the first end of the first channel section is communicated with the grease inlet, the second end of the first channel section is communicated with the first end of the second channel section, and the second end of the second channel section is communicated with the grease outlet.
In the flange sealing device, optionally, the first channel section is perpendicular to the bevel of the bevel flange.
In the flange sealing device, optionally, the second channel section is perpendicular to the end face of the second end of the bevel flange.
According to the flange sealing device, optionally, at least two grease injection channels are arranged on the groove flange at intervals.
According to the flange sealing device, optionally, at least two grease injection channels are uniformly distributed along the circumferential direction of the groove flange.
In the flange sealing device, optionally, the grease outlet is disposed near the annular sealing groove.
According to the flange sealing device, optionally, the grease injection check valve is connected with the hole wall of the grease inlet in a threaded sealing mode.
In the flange sealing device, optionally, the annular sealing groove is coaxially disposed with the inner hole.
In the flange sealing device, optionally, the hardness of the annular sealing gasket is less than that of the groove flange.
The flange sealing device of the invention is used on a process pipeline in an oil-gas field station, and comprises: the annular sealing gasket is clamped between the two beveled flanges; the bevel flanges are provided with a first end and a second end, the first end is used for being connected with a pipeline, the second ends of the two bevel flanges are arranged oppositely, the end surfaces of the second ends of the two bevel flanges are provided with annular sealing grooves capable of containing annular sealing gaskets, and the annular sealing grooves are arranged around the inner holes of the bevel flanges; the groove flange is provided with a grease injection channel which is provided with a grease inlet and a grease outlet, the grease inlet is communicated with the outside, the grease inlet is provided with a grease injection check valve, so that sealing grease can be injected into the inner space of the flange sealing device from the grease inlet, a medium in a pipeline cannot flow out of the grease inlet under the blocking of the grease injection check valve, the grease outlet is arranged between the annular sealing groove and the inner hole and is communicated with the joint of the annular sealing groove and the annular sealing gasket, so that the sealing grease flowing out of the grease outlet can flow to the joint of the annular sealing groove and the annular sealing gasket under the thrust action of the medium in the pipeline, then the sealing grease gathered near the joint is wrapped by the medium near the leakage or puncture position to enter the leakage or puncture gap, and is accumulated in the gap to form filling blockage to block the leakage or puncture, the method and the device have the advantages that the sealing performance of the flange sealing device is recovered, so that the sealing joint of the flange can be repaired under the condition that the process pipeline is not stopped, the sealing performance of the flange sealing device is recovered, and the production efficiency of the process pipeline is guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a prior art flange seal assembly;
fig. 2 is a schematic structural diagram of a flange sealing device according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of another flange sealing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another flange sealing device according to an embodiment of the present invention.
Description of reference numerals:
110. 210-groove flange;
112-sealing the groove;
120-sealing steel ring;
130. 230-a fastener;
212-annular seal groove;
213-inner bore;
214-a grease injection channel;
2141-a first channel segment;
2142-a second channel segment;
214 a-a fat inlet;
214 b-a fat outlet;
215-grease injection check valve;
220-annular seal;
221-junction.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower" (if any), and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing the present invention and to simplify description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The terms "first" and "second" in the description and claims of the present application and the description of the above-described figures are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
The process pipeline in the oil and gas field station is usually connected by fastening two groove flanges through a fastening piece after being butted, corresponding sealing grooves are usually arranged on the butted surfaces of the two groove flanges in order to ensure the sealing performance and the pressure-bearing capacity after connection, a sealing steel ring is clamped between the two corresponding sealing grooves, and the two groove flanges extrude the sealing steel ring through the sealing grooves under the fastening action of the fastening piece so as to meet the sealing requirement and the pressure-bearing requirement of the process pipeline. In the process of actual production of the process pipeline, a leakage gap appears on a sealing surface between the sealing groove and the sealing steel ring due to the temperature or pressure change of a medium in the pipeline, a puncture notch is generated on the sealing surface due to the corrosion of the medium in the pipeline due to the strong corrosivity, and in addition, the sealing failure between the sealing groove and the sealing steel ring is caused by the looseness of a fastener due to the change of the outside air temperature.
In the prior art, when the problem of leakage or puncture of a sealing surface between a sealing groove and a sealing steel ring is solved, a fastener for connecting two bevel flanges is generally fastened so that the sealing groove can further compress the sealing steel ring to eliminate a leakage gap or a puncture gap; under the condition that the fastening mode is invalid, the prior art can only restore the sealing performance between the sealing groove and the sealing steel ring by replacing the bevel flange or the sealing steel ring.
However, in the prior art, when the bevel flange plate or the sealing steel ring is replaced, the production of the process pipeline needs to be stopped for pressure relief, then the bevel flange and the sealing steel ring need to be disassembled, the sealing groove and the sealing steel ring need to be checked, the bevel flange and/or the sealing steel ring which needs to be replaced are determined, the process pipeline is assembled and connected again after the replacement is completed, the sealing is tested, the whole replacement process takes a long time, that is, the process pipeline needs to be stopped for a long time, and the production efficiency of the process pipeline is seriously affected.
In order to solve the technical problems in the prior art, the invention provides a flange sealing device, which is provided with a grease injection channel, when the joint of an annular sealing groove and an annular sealing gasket of the flange sealing device is permeated or punctured, sealing grease can be injected into the joint of the annular sealing groove and the annular sealing gasket through the grease injection channel to fill a leakage gap or a puncture gap at the joint in a state that a process pipeline is not stopped, so that the sealing performance of the flange sealing device can be recovered, and the production efficiency of the process pipeline is ensured.
The flange sealing device of the present invention will be described in detail below by way of specific examples:
fig. 2 is a schematic structural diagram of a flange sealing device according to an embodiment of the present invention. Fig. 3 is a schematic structural diagram of another flange sealing device according to an embodiment of the present invention. Fig. 4 is a schematic structural diagram of another flange sealing device according to an embodiment of the present invention. The present embodiment provides a flange sealing apparatus.
This flange sealing device is often used for on the process line in the oil gas field station, and this flange sealing device includes: the sealing device comprises an annular sealing gasket 220 and two oppositely arranged bevel flanges 210, wherein the annular sealing gasket 220 is clamped between the two bevel flanges 210.
Among them, the annular sealing gasket 220 may be made of a metal material, such as: sealing the steel ring; or made of a polymer material, such as: polytetrafluoroethylene; but may be made of any other material that meets the functional and performance requirements of the present invention with respect to the annular seal 220 and is not specifically limited herein.
The bevel flange 210 has a first end and a second end, wherein the first end of the bevel flange 210 is the end having a bevel, and the second end of the bevel flange 210 is the end of the plane opposite to the first end of the bevel flange 210; the first end of the groove flange 210 is used for connecting with a pipeline, and the specific connection mode of the groove flange and the pipeline can be threaded connection or welding; the second ends of the two bevel flanges 210 are disposed oppositely, and the end faces of the second ends of the two bevel flanges 210 are provided with annular sealing grooves 212 capable of accommodating the annular sealing gaskets 220, the annular sealing grooves 212 are disposed around the inner holes 213 of the bevel flanges 210, generally, the annular sealing grooves 212 are circular, and the annular sealing gaskets 220 need to be placed in the annular sealing grooves 212, so that the annular sealing gaskets 220 are also circular.
Meanwhile, a grease injection channel 214 is arranged on the bevel flange 210, the grease injection channel 214 is provided with a grease inlet 214a and a grease outlet 214b, the grease inlet 214a is communicated with the outside, a grease injection check valve 215 is arranged at the grease inlet 214a, the grease injection check valve 215 can enable the direction from the grease inlet 214a to the grease outlet 214b to be communicated, and the direction from the grease outlet 214b to the grease inlet 214a to be blocked, so that a grease gun or other equipment capable of being used for grease injection can inject sealing grease into the grease injection channel 214 through the grease injection check valve 215 at the grease inlet 214a and flow into the inner space of the flange sealing device through the grease outlet 214b, and a medium entering the inner space of the flange sealing device from a pipeline cannot flow to the outside through the grease injection channel 214 from the grease injection check valve 215 at the grease inlet 214 a; the grease outlet 214b is arranged between the annular sealing groove 212 and the inner hole 213 and is communicated with the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220, so that the sealing grease flowing out of the grease outlet 214b flows to the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220 under the thrust action of the medium in the pipeline to seal the joint 221, wherein sealing particles can be added into the sealing grease to increase the leakage stoppage effect of the sealing grease, and the sealing capability and the sealing reliability of the sealing grease are improved.
In particular, when the flange sealing device is used, the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device leaks or punctures due to the pressure or temperature change of the medium in the pipeline; or, when the medium in the pipeline has strong corrosiveness and corrodes a pit at the annular sealing groove 212 of the bevel flange 210 or at the edge of the annular sealing gasket 220, so that the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 leaks or punctures; firstly, the sealing can be restored by tightly fastening the fastening members 230 of the two bevel flanges 210 to compress the annular sealing gasket 220, when the way of fastening the fastening members 230 of the two bevel flanges 210 cannot eliminate leakage or puncture, a grease gun or other grease injecting equipment can be connected with the grease injecting check valve 215 at the grease inlet 214a of the bevel flange 210, and the grease is injected into the grease injecting channel 214 and flows into the inner space of the flange sealing device through the grease outlet 214b, at this time, because the medium entering the inner space of the flange sealing device from the pipeline has a certain pressure and the pressure is diffused from the inner hole 213 of the bevel flange 210 to the direction of the annular sealing gasket 220, the grease can be gathered to the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device under the extrusion and pushing of the medium, and then the grease gathered near the joint 221 can be wrapped by the medium near the leakage or puncture to enter the leakage or puncture And the leaked gap is accumulated to form a filling plug in the gap, so that leakage or puncture is blocked, and the sealing performance of the flange sealing device is recovered.
Of course, when the flange sealing device leaks or punctures, the groove flange 210 may not be fastened according to actual needs, but the gap causing the leakage or puncture at the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device may be directly filled by injecting grease into the grease inlet 214a, so as to restore the sealing performance of the flange sealing device.
Referring to fig. 4, in particular, the grease injection channel 214 may include a first channel section 2141 and a second channel section 2142; the first end of the first passage section 2141 is communicated with the grease inlet 214a, the second end of the first passage section 2141 is communicated with the first end of the second passage section 2142, and the second end of the second passage section 2142 is communicated with the grease outlet 214 b.
The first channel section 2141 and the second channel section 2142 may be on the same straight line, or may have a certain included angle therebetween; the specific arrangement of the first channel section 2141 and the second channel section 2142 may be determined by comprehensive consideration of practical situations, and is not limited herein.
Referring to fig. 4, in order to enable a grease gun or other grease injecting equipment to have a large operating space when the grease gun or other grease injecting equipment is connected to the grease inlet 214a during grease injection, it is preferable that the first channel section 2141 is perpendicular to the bevel of the bevel flange 210, in this case, the grease inlet 214a communicated with the first end of the first channel section 2141 is located on the bevel of the bevel flange 210, and the normal line of the grease inlet 214a is perpendicular to the bevel of the bevel flange 210.
In concrete implementation, when the flange sealing device leaks or punctures, a grease gun or other grease injecting equipment is close to the grease inlet 214a communicated with the first end of the first channel section 2141 of the grease injecting channel 214 along a direction perpendicular to the bevel of the bevel flange 210, and sealing grease is injected after the grease gun or other grease injecting equipment is butted in place with the grease injecting check valve 215 at the grease inlet 214a, wherein in the process that the grease gun or other grease injecting equipment is perpendicular to the bevel of the bevel flange 210 and close to the grease inlet 214a, a certain included angle is formed between the grease gun or other grease injecting equipment and the pipeline connected to the two ends of the flange sealing device, so that the interference of the pipeline to the grease gun or other grease injecting equipment can be reduced, and in addition, the interference of the fastener 230 connecting the two bevel flanges 210 to the grease gun or other grease injecting equipment can also be reduced.
Referring to fig. 4, in order to enable the sealing grease to enter the flange sealing device from the grease outlet and then quickly and sufficiently cover the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 under the squeezing and pushing of the medium in the pipeline, it is preferable that the second channel section 2142 is perpendicular to the end surface of the second end of the groove flange 210, at this time, the grease outlet 214b communicated with the second end of the second channel section 2142 is located on the end surface of the second end of the groove flange 210 and is close to the annular sealing groove 212, and the normal line of the grease outlet 214b is perpendicular to the end surface of the second end of the groove flange 210.
In concrete implementation, when the flange sealing device leaks or punctures, the process pipeline does not need to be stopped to release pressure, that is, under the condition of pressure of the pipeline, a grease injection gun or other grease injection equipment is directly close to the grease inlet 214a and is butted with the grease injection check valve 215 at the grease inlet 214a in place, and then sealing grease is injected, the sealing grease firstly enters the grease injection channel 214 through the grease injection check valve 215 and then flows into the space between the end faces of the opposite second ends of the two bevel flanges 210 from the grease outlet 214b of the grease injection channel 214, because the medium entering the flange sealing device from the pipe section has a certain pressure and the pressure is diffused from the inner hole 213 of the bevel flange 210 to the direction of the annular sealing gasket 220, the sealing grease flowing into the space between the end faces of the opposite second ends of the two bevel flanges 210 from the grease outlet 214b can be gathered to the annular sealing groove 212 and the annular sealing ring 220 of the flange sealing device under the extrusion and pushing of the medium inside the flange sealing device The joint 221 of the sealing gasket 220 is shaped to fill a gap of the joint 221 which causes leakage or puncture, and the normal line of the grease outlet 214b is arranged to be perpendicular to the end surface of the second end of the beveled flange 210, so that the sealing grease flowing out of the grease outlet 214b can be pushed to the joint 221 of the annular sealing groove 212 of the flange sealing device and the annular sealing gasket 220 without leakage and smoothness by media, and then the sealing grease gathered near the joint 221 is wrapped by the media near the leakage or puncture and enters the gap of the leakage or puncture, and is accumulated in the gap to form filling blockage, block the leakage or puncture, and restore the sealing performance of the flange sealing device.
In order to enable the flange sealing device to repair a leakage or puncture gap at a joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 more accurately and quickly and save sealing grease, at least two grease injection channels 214 may be provided on the groove flange 210, that is, in concrete implementation, two grease injection channels 214 may be provided on the groove flange 210, three grease injection channels 214 may be provided on the groove flange 210, or more grease injection channels 214 may be provided on the groove flange 210 according to actual needs.
The at least two grease injection channels 214 are arranged on the groove flange 210 at intervals, that is, the at least two grease injection channels 214 may be arranged on the groove flange 210 at equal intervals, or may be arranged at unequal intervals, or may be a specific arrangement manner of the grease injection channels 214 determined according to an operation space on site when the grease injection channels are specifically implemented, which is not further limited herein.
It should be noted that, no matter how many grease injection channels 214 are arranged on the bevel flange 210, and no matter how at least two grease injection channels 214 are arranged on the bevel flange 210, the strength of the bevel flange 210, the pressure requirement of the specific application scenario of the flange sealing device, and the like need to be considered; that is to say, after the number and arrangement of the grease injection channels 214 arranged on the bevel flange 210 of the flange sealing device are determined, the overall strength of the bevel flange 210 needs to be checked, so as to ensure that both the overall strength of the bevel flange 210 and the strength of the wall surface near the grease injection channels 214 can meet the strength requirement of the scene to which the flange sealing device is applied.
In consideration of uncertainty of positions of leakage or puncture at the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device, in order to ensure that a gap of leakage or puncture occurs at any position of the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220, accurate and rapid treatment can be achieved, and sealing grease can be saved, at least two grease injection channels 214 can be uniformly distributed along the circumferential direction of the groove-divided flange 210.
In specific implementation, when a leakage or puncture gap occurs at any position of the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device, the grease injection channel 214 closest to the leakage or puncture gap can be selected to inject the sealing grease so that the sealing grease blocks the leakage or puncture gap and recovers the sealing, and the grease injection mode of the grease injection channel 214 closest to the leakage or puncture gap can be selected, so that the leakage or puncture at any position of the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 can be accurately and quickly processed, and the sealing grease can be saved.
Of course, if the gap between the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device is relatively large, or the positions of leakage or puncture are relatively large, sealing grease can be injected from more than two grease injection channels 214 at the same time, so as to rapidly block the relatively large leakage or puncture gap, or rapidly block a plurality of leakage or puncture gaps, thereby facilitating the rapid recovery of sealing of the flange sealing device. In particular, when a plurality of leaks occur, the sealing can be restored by fastening the fastening member 230 on the groove flange 210, and injecting sealing grease through the grease injection channel 214 to restore the sealing if the fastening is invalid.
In order to allow the sealing grease entering the flange sealing device from the grease outlet 214b to quickly gather in the leaking or leaking gap at the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 to block the leaking or leaking gap as soon as possible and restore the sealing of the flange sealing device, the grease outlet 214b may be disposed close to the annular sealing groove 212.
In concrete implementation, when a gap of leakage or puncture occurs at the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device, sealing grease is injected into the flange sealing device from the grease injection channel 214, because the grease outlet 214b is close to the annular sealing groove 212, the sealing grease flowing into the flange sealing device from the grease outlet 214b can quickly reach the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220 under the squeezing and pushing of a medium in the flange sealing device, the sealing grease gathered near the joint 221 is wrapped by the medium near the leakage or puncture to enter the gap of the leakage or puncture, and the sealing grease is accumulated in the gap to form filling blockage, so that the leakage or puncture is blocked, and the sealing performance of the flange sealing device is restored.
It should be noted that the distance between the grease outlet 214b and the annular seal groove 212 may be determined according to the needs in practical applications, and is not specifically limited herein, however, when the distance between the grease outlet 214b and the annular seal groove 212 is determined, the strength of the groove flange 210, the pressure requirement of the application scenario of the flange seal device, and the strength of the edge of the annular seal groove 212 need to be taken into consideration, that is, after the distance between the grease outlet 214b and the annular seal groove 212 is determined, the strength of the whole groove flange 210 needs to be checked to ensure that the strength of the whole groove flange 210 and the strength of the edge of the annular seal groove 212 close to the grease injection channel 214 can both meet the strength requirement of the application scenario of the flange seal device.
Besides, the method for arranging the grease-filling check valve 215 at the grease inlet 214a of the grease-filling channel 214 includes, but is not limited to, the following two possible implementation manners:
one possible implementation is: the grease injection check valve 215 is connected with the hole wall of the grease inlet 214a in a sealing manner through threads, namely, internal threads are arranged on the hole wall of the grease inlet 214a, and meanwhile, external threads matched with the internal threads on the hole wall of the grease inlet 214a are arranged on the outer surface of one end, connected with the grease inlet 214a, of the grease injection check valve 215 so as to realize thread sealing connection, wherein the thread sealing connection can be conical threads or flat threads and the like; generally, under a high-pressure working condition, a conical surface seal is selected between the grease injection check valve 215 and the hole wall of the grease inlet 214a, and the sealing effect is good. In addition, the implementation mode of connecting the grease injection check valve 215 and the hole wall of the grease inlet 214a through thread sealing has the advantage of being convenient to disassemble, assemble and replace.
In other embodiments, to ensure that the sealing of the threaded connection is more reliable, a sealing material may be applied to the threaded connection to further ensure the sealing performance of the threaded connection between the grease-filled check valve 215 and the wall of the bore of the grease inlet 214 a.
Another possible implementation is: the grease injection check valve 215 is connected with the hole wall of the grease inlet 214a through an interference fit mode, and the connection mode enables good sealing performance to be achieved between the grease injection check valve 215 and the hole wall of the grease inlet 214 a.
At present, the shape of the beveled flange 210 and the inner hole 213 thereof, which are commonly used in a flange sealing device, are circular, and the shape of the beveled flange 210 and the inner hole 213 thereof are coaxially arranged, so that the beveled flange 210, the annular sealing groove 212 and the annular sealing gasket 220 of the flange sealing device can be uniformly stressed, the annular sealing groove 212 and the inner hole 213 can be coaxially arranged, and the arrangement mode ensures that the stress of the flange sealing device is uniform, and simultaneously facilitates the uniform arrangement of the plurality of grease injection channels 214 along the circumferential direction.
Considering that the sealing manner of the flange sealing device is realized by arranging the two bevel flanges 210 opposite to each other and pressing the annular sealing gasket 220 clamped between the annular sealing grooves 212 of the two bevel flanges 210, in order to enable the annular sealing gasket 220 to deform under the pressing of the two bevel flanges 210 and seal the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220 so as to ensure the sealing performance of the flange sealing device, the hardness of the selected annular sealing gasket 220 is generally smaller than that of the bevel flanges 210.
In the concrete implementation, when the two beveled flanges 210 are oppositely arranged and fastened and approached by the fastening member 230, the annular sealing grooves 212 oppositely arranged on the two beveled flanges 210 squeeze the annular sealing gasket 220 clamped therebetween, and at this time, because the hardness of the annular sealing gasket 220 is less than that of the beveled flanges 210, the annular sealing gasket 220 gradually deforms under the squeezing of the beveled flanges 210 and fills the joint 221 between the annular sealing groove 212 and the annular sealing gasket 220, so that the flange sealing device has good sealing performance and certain pressure-bearing capacity.
The flange sealing device of the invention is used on a process pipeline in an oil-gas field station, and comprises: the sealing device comprises an annular sealing gasket 220 and two oppositely arranged beveled flanges 210, wherein the annular sealing gasket 220 is clamped between the two beveled flanges 210; the bevel flanges 210 are provided with a first end and a second end, the first end is used for being connected with a pipeline, the second ends of the two bevel flanges 210 are arranged oppositely, the end surfaces of the second ends of the two bevel flanges 210 are provided with annular sealing grooves 212 capable of accommodating annular sealing gaskets 220, and the annular sealing grooves 212 are arranged around inner holes 213 of the bevel flanges 210; by providing a grease injection passage 214 on the bevel flange 210, the grease injection passage 214 is provided with a grease inlet 214a and a grease outlet 214b, the grease inlet 214a is communicated with the outside, a grease check valve 215 is provided at the grease inlet 214a, so that sealing grease can be injected into the inner space of the flange sealing device from the grease inlet 214a, medium in the pipeline can not flow out of the grease inlet 214a under the blocking of the grease check valve 215, the grease outlet 214b is provided between the annular sealing groove 212 and the inner hole 213 and is communicated with the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220, so that sealing grease flowing out from the grease outlet 214b can flow to the joint 221 of the annular sealing groove 212 and the annular sealing gasket 220 under the thrust of the medium in the pipeline, and then the sealing grease gathered near the joint 221 is wrapped by the medium near the leakage or puncture and enters into the leakage or puncture gap, and the filling blockage is formed by accumulation in the gap to block leakage or puncture so as to recover the sealing performance of the flange sealing device, thereby repairing the sealing joint 221 of the flange and recovering the sealing performance of the flange sealing device under the condition that the process pipeline does not stop production, and further ensuring the production efficiency of the process pipeline.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A flange sealing device is used on a process pipeline in an oil and gas station, and is characterized by comprising: the sealing device comprises an annular sealing gasket and two oppositely arranged bevel flanges, wherein the annular sealing gasket is clamped between the two bevel flanges;
the groove flanges are provided with a first end and a second end, the first ends of the groove flanges are used for being connected with a pipeline, the second ends of the two groove flanges are arranged oppositely, the end faces of the second ends of the two groove flanges are provided with annular sealing grooves capable of containing the annular sealing gaskets, and the annular sealing grooves are arranged around the inner holes of the groove flanges;
be provided with on the groove flange and annotate the fat passageway, it has into fat mouth and play fat mouth to annotate the fat passageway, it communicates with the outside to go into the fat mouth, it is provided with notes fat single current valve to go into fat mouth department, it sets up to go out the fat mouth annular seal groove with between the hole, and with annular seal groove with the junction intercommunication of annular seal pad, so that follow the sealed fat that goes out the fat mouth outflow is in the thrust action of the medium in the pipeline flows to the junction, with sealed the junction.
2. The flange seal arrangement of claim 1, wherein the grease injection passage includes a first passage section and a second passage section;
the first end of the first channel section is communicated with the grease inlet, the second end of the first channel section is communicated with the first end of the second channel section, and the second end of the second channel section is communicated with the grease outlet.
3. The flange seal apparatus of claim 2, wherein the first channel segment is perpendicular to the beveled face of the beveled flange.
4. The flange seal arrangement of claim 3, wherein the second channel segment is perpendicular to an end face of the second end of the groove flange.
5. The flange sealing device according to any one of claims 1 to 4, wherein the number of the grease injection channels is at least two, and at least two of the grease injection channels are arranged at intervals on the groove flange.
6. The flange seal of claim 5, wherein at least two of the grease injection channels are evenly distributed along a circumference of the beveled flange.
7. The flange seal of any one of claims 1 to 4, wherein the grease outlet is disposed proximate the annular seal groove.
8. The flange sealing device according to any one of claims 1 to 4, wherein the grease injection check valve is connected with the hole wall of the grease inlet in a threaded sealing manner.
9. The flange seal arrangement of any one of claims 1 to 4 wherein the annular seal groove is disposed coaxially with the inner bore.
10. The flange seal according to any one of claims 1 to 4, wherein the annular gasket has a hardness less than that of the bevel flange.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239304.2A CN112923145A (en) | 2019-12-06 | 2019-12-06 | Flange sealing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239304.2A CN112923145A (en) | 2019-12-06 | 2019-12-06 | Flange sealing device |
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| CN112923145A true CN112923145A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911239304.2A Pending CN112923145A (en) | 2019-12-06 | 2019-12-06 | Flange sealing device |
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| CN211649391U (en) * | 2019-12-06 | 2020-10-09 | 中国石油天然气股份有限公司 | Flange sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406481A (en) * | 1979-11-15 | 1983-09-27 | Sibex (Construction) Limited | Sealing clamps |
| US4801161A (en) * | 1986-05-08 | 1989-01-31 | Vickers Plc | Rotary pipe coupling |
| CN203230985U (en) * | 2013-04-10 | 2013-10-09 | 河北四伟化学工业有限公司 | Pipeline sealing connection device |
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