CN114909540A - Pipe thread plugging method - Google Patents
Pipe thread plugging method Download PDFInfo
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- CN114909540A CN114909540A CN202110167813.XA CN202110167813A CN114909540A CN 114909540 A CN114909540 A CN 114909540A CN 202110167813 A CN202110167813 A CN 202110167813A CN 114909540 A CN114909540 A CN 114909540A
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- Prior art keywords
- control valve
- pressure
- taking control
- pressure taking
- grease
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000004519 grease Substances 0.000 claims abstract description 185
- 238000002347 injection Methods 0.000 claims abstract description 127
- 239000007924 injection Substances 0.000 claims abstract description 127
- 238000003825 pressing Methods 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 50
- 239000003292 glue Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 22
- 239000003345 natural gas Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 7
- 235000015111 chews Nutrition 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- 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
-
- 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
- F16L55/1612—Devices for covering leaks in pipes or hoses, e.g. hose-menders by means of a plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
The application relates to a pipe thread plugging method, and belongs to the technical field of plugging and grease injection. According to the technical scheme provided by the embodiment of the application, the single-filament head is clamped by the two clamping plates, and the two ends of the two clamping plates are connected through the first connecting piece, so that the clamping plates and the single-filament head are relatively fixed when in use; the grease injection nozzle arranged on the grease injection nozzle pressing plate is connected with the pressure taking control valve, so that the grease injection nozzle and the pressure taking control valve are relatively fixed when in use; because this first connecting piece chews the clamp plate through the second connecting piece and annotates the fat and connects, under the condition that need not to bleed, can annotate the fat through the mode that monofilament head and pressure control valve are fixed respectively, consequently need not to annotate the fat through the mode of unloading natural gas, has better economic benefits, also can not cause harm to the environment.
Description
Technical Field
The application relates to the technical field of leakage stoppage and grease injection, in particular to a pipe thread leakage stoppage method.
Background
In the pressure measuring devices installed in gas transmission stations and valve rooms, the situation that the pressure measuring devices leak from threads close to the connecting end of a main line often occurs, and leaked natural gas can generate great potential safety hazards to the surroundings, so that the leaking points need to be repaired by adopting a necessary method when necessary.
The leaking stoppage when the pipe thread leaks comprises: and (3) emptying and decompressing natural gas in the pipe, disassembling the pressure control valve, disassembling the external thread double-screw head, and then winding the sealing raw material belt or the special thread sealant at the thread position for disposal. However, the gas transmission main line is in a production state, and generally does not have the opportunity of stopping gas to process leakage points, the distance between the station and the valve chamber or between the valve chamber and the valve chamber is generally dozens of kilometers, if the main line is stopped and emptied, the emptied natural gas is more, the economic loss of a company is larger, and the emptied natural gas is more, so that a larger risk is generated to the surrounding environment. Therefore, the method for further optimizing the leakage stoppage when the pipe thread leaks is undoubtedly of great significance for optimizing the assembly process and the safety performance.
Disclosure of Invention
The embodiment of the application provides a pipe thread plugging method, which can inject grease without emptying natural gas, has better economic benefit and does not cause harm to the environment. The technical scheme is as follows:
a pipe thread plugging method is provided, which comprises the following steps:
when the leakage occurs at the threaded connection part of the pressure taking control valve of the pressure taking device and the single-screw head on the gas transmission pipeline, closing the pressure taking control valve, and detaching a pressure gauge joint at the gas outlet of the pressure taking control valve;
connecting a grease injection port at the inner end of a grease injection nozzle of the pipe thread plugging device with an air outlet of the pressure taking control valve;
clamping the monofilament head by using two clamping plates;
two first connecting pieces are respectively connected with two ends of the two clamping plates and provide clamping force for the clamping plates;
two second connecting pieces between the fastening grease injection nozzle pressing plate and the two first connecting pieces;
connecting a grease injection gun with the outer end of a grease injection nozzle on the pipe thread plugging device;
opening the pressure control valve, and loosening the threaded connection between the pressure control valve and the monofilament head;
injecting sealing grease into the pressure control valve through a grease injection port of the grease injection nozzle at a preset pressure by using a grease injection gun;
clamping the pressure taking control valve by using a wrench, and driving the pressure taking control valve to rotate back and forth to enable the threaded connection part between the pressure taking control valve and the monofilament head to rotate relatively, so that sealing grease enters the threaded connection part to seal a leakage point at the threaded connection part;
when the leakage point stops leaking, closing the pressure taking control valve and disassembling the pipe thread plugging device;
and installing the pressure gauge joint at the air outlet of the pressure taking control valve, and opening the pressure taking control valve.
In a possible realization mode, a grease injection port at the inner end of a grease injection nozzle of the pipe thread plugging device is in threaded connection with an air outlet of the pressure taking control valve.
In one possible implementation, the clamping of the monofilament head using two clamping plates comprises:
and clamping the monofilament head by using the circular arc-shaped grooves on the two clamping plates.
In a possible implementation manner, the two first connecting members are respectively used for connecting two ends of the clamping plate and providing clamping force for the clamping plate, and the method includes the following steps:
the distance between the two clamping plates is shortened by screwing the nuts at the two ends of the first connecting piece, so that clamping force is provided for the clamping plates.
In one possible implementation, the two second connectors between the fastening grease-injection nozzle pressure plate and the two first connectors comprise:
the distance between the grease injection nozzle pressing plate and the two first connecting pieces is shortened by screwing the nuts at the two ends of the second connecting piece.
In one possible implementation, the amount of sealing grease injected into the pressure-taking control valve is greater than the volume of the pressure-taking control valve.
In one possible implementation, the wrench is clamped on the pressure control valve and drives the pressure control valve to rotate back and forth, so that the threaded connection between the pressure control valve and the monofilament head rotates relatively, and the method comprises the following steps:
screwing the pressure-taking control valve to reduce the space in the pressure-taking control valve, so that the sealing grease is pressed into the connecting position between the pressure-taking control valve and the monofilament head;
moving the pressure taking control valve to a direction away from the monofilament head by a preset distance by unscrewing the pressure taking control valve, thereby providing a space for sealing grease in the pressure taking control valve;
sealing grease is injected into the internal space of the pressure control valve.
In one possible implementation, when the leakage point stops leaking, after closing the pressure control valve and detaching the pipe thread plugging device, the method further comprises:
and (4) sealing the outer side of the repaired leakage point by using glue.
In one possible implementation, the glue is a two-component glue.
In one possible implementation, before the pressure gauge joint is installed at the air outlet of the pressure taking control valve and the pressure taking control valve is opened, the method further comprises:
and cleaning redundant sealant outside the pressure taking control valve.
According to the technical scheme provided by the embodiment of the application, the single-filament head is clamped by the two clamping plates, and the two ends of the two clamping plates are connected through the first connecting piece, so that the clamping plates and the single-filament head are relatively fixed when in use; the grease injection nozzle arranged on the grease injection nozzle pressing plate is connected with the pressure taking control valve, so that the grease injection nozzle and the pressure taking control valve are relatively fixed in use; because this first connecting piece chews the clamp plate through the second connecting piece and annotates the fat and connects, under the condition that need not to bleed, can annotate the fat through the mode that monofilament head and pressure control valve are fixed respectively, consequently need not to annotate the fat through the mode of unloading natural gas, has better economic benefits, can not cause harm to the environment yet.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic top view of a pipe thread plugging device provided in an embodiment of the present application;
fig. 2 is a front view structural schematic diagram of a pipe thread plugging device provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a pipe thread plugging device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a grease injection nozzle 22 provided in the embodiment of the present application;
FIG. 5 is a flow chart of a method for plugging a pipe thread according to an embodiment of the present disclosure;
fig. 6 is a flowchart of a method for plugging a pipe thread according to an embodiment of the present application.
The various reference numbers in the drawings are illustrated below:
1-a clamping unit;
11-a clamping plate;
111-arc-shaped grooves;
112-non-slip rubber mat;
12-a first connector;
121-a through hole;
13-a second connector;
2-a grease injection unit;
21-grease injection nozzle pressing plate;
211-an opening;
22-a grease injection nozzle;
221-snap ring;
222-an outer end;
223-an inner end;
01-pressure control valve;
02-single filament head.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic top-view structural view of a pipe thread leakage stopping device according to an embodiment of the present application, fig. 2 is a schematic front-view structural view of the pipe thread leakage stopping device according to the embodiment of the present application, fig. 3 is a schematic use structural view of the pipe thread leakage stopping device according to the embodiment of the present application, please refer to fig. 1 to 3, the device includes: a clamping unit 1 and a grease injection unit 2; the clamping unit 1 is used for being connected to one end of an air inlet of the pressure taking control valve 01, the grease injection unit 2 is used for being connected to one end of an air outlet of the pressure taking control valve 01, and the air inlet of the pressure taking control valve 01 is connected with a main line pressure taking connecting end through a single-screw head 02; the clamping unit 1 includes: the single-thread clamping device comprises two clamping plates 11 and two first connecting pieces 12, wherein a single thread head 02 is clamped between the two clamping plates 11, two ends of each clamping plate 11 are connected through one first connecting piece 12, and the two first connecting pieces 12 are used for providing clamping force for the two clamping plates 11; the grease injection unit 2 includes: the grease injection nozzle pressing plate 21 and the grease injection nozzle 22 are arranged, the middle part of the grease injection nozzle pressing plate 21 is provided with an opening 211, the grease injection nozzle 22 is clamped in the opening 211, and the grease injection nozzle of the grease injection nozzle 22 is used for being connected with the air outlet of the pressure taking control valve 01; the clamping unit 1 is connected to the greasing unit 2 by at least two second connections 13.
The structure and the working principle of the device are detailed below:
in the actual production process, referring to fig. 3, the pressure taking control valve 01 is connected with the trunk line pressure taking connecting end through the single-thread head 02. Therefore, the pressure control valve 01 and the monofilament head 02 have a high pressure inside. Because the monofilament head 02 is connected with the trunk line pressure taking connecting end, the fixation of the monofilament head 02 is firmer, because the pressure taking control valve 01 is connected with the monofilament head 02, the pressure taking control valve 01 is required to be continuously screwed in the grease injection process, the threaded connection between the pressure taking control valve 01 and the monofilament head 02 is easily loosened, and the pressure taking control valve 01 is separated from the threaded connection between the pressure taking control valve 01 and the monofilament head 02 based on pressure, so that the pressure taking control valve 01 flies out, and the danger that the leakage of the fluid in the trunk line or the pressure taking control valve 01 damages workers is caused.
After the pipe thread plugging device provided by the embodiment of the application is installed on the pressure taking control valve 01 and the monofilament head 02, the grease injection unit 2 is located at one end of an air outlet of the pressure taking control valve 01 and is used for injecting grease, the injected sealing grease is used for repairing leakage points which are generated carelessly when the pressure taking control valve 01 is in threaded connection with the monofilament head 02, the clamping unit 1 is located at one end of an air inlet of the pressure taking control valve 01 and clamps the monofilament head 02, and potential safety hazards caused by the fact that the pressure taking control valve 01 is tripped out due to pressure are avoided.
The clamping unit 1 comprises two clamping plates 11, the two clamping plates 11 clamp the monofilament head 02, the two ends of the two clamping plates 11 are respectively provided with a first connecting piece 12, the two clamping plates 11 can be connected through the two first connecting pieces 12, and the clamping space between the two clamping plates 11 is adjusted, so that clamping and fastening effects on the monofilament head 02 are realized; the grease injection unit 2 comprises a grease injection nozzle pressing plate 21, an opening 211 is formed in the middle of the grease injection nozzle pressing plate 21, a grease injection nozzle 22 is inserted into the opening 211, the grease injection nozzle of the grease injection nozzle 22 is detachably connected with an air outlet of the pressure taking control valve 01, and grease injection into the pressure taking control valve 01 is achieved, wherein the grease injection nozzle 22 can be inserted from the inside of the opening 211, and the embodiment is not limited thereto. At this time, the grease injection unit 2 is connected with the clamping unit 1 through the second connecting piece 13, the grease injection unit 2 and the clamping unit 1 can be adjusted to reach a proper distance, and a counter pull is formed to prevent the pressure taking control valve 01 from tripping and flying out, so that potential safety hazards are caused.
In this embodiment, in the process of injecting grease into the pressure control valve 01, a wrench can be used to clamp the pressure control valve 01 and drive the pressure control valve 01 to rotate back and forth, so that the tightness of the connection between the pressure control valve 01 and the monofilament head 02 is achieved, and at this time, the sealing grease injected into the pressure control valve 01 can be caused to leak out from the connection position between the pressure control valve 01 and the monofilament head 02, and the sealing grease is applied to the whole threaded connection position, so that the sealing repair of the leakage point is achieved.
The pipe thread plugging device provided by the embodiment of the application comprises a clamping unit 1 and a grease injection unit 2, wherein the clamping unit 1 is positioned at one end of an air inlet of a pressure taking control valve 01, the grease injection unit 2 is positioned at one end of an air outlet of the pressure taking control valve 01, and the pressure taking control valve 01 is connected with a main line pressure taking connecting end through a single-thread head 02; the clamping unit 1 comprises two clamping plates 11, the monofilament head 02 is clamped between the middle parts of the two clamping plates 11, first connecting pieces 12 are arranged at two ends of each of the two clamping plates 11, and the first connecting pieces 12 are used for connecting the two clamping plates 11 and providing clamping force for the clamping plates 11, so that the clamping unit 1 and the monofilament head 02 are relatively fixed when in use; the grease injection unit 2 comprises a grease injection nozzle pressing plate 21, the middle part of the grease injection nozzle pressing plate 21 is provided with an opening 211, a grease injection nozzle 22 is inserted into the opening 211, and a grease injection port of the grease injection nozzle 22 is in threaded connection with an outlet of the pressure taking control valve 01, so that the grease injection unit 2 and the pressure taking control valve 01 are relatively fixed when in use; because the clamping unit 1 is connected with the grease injection unit 2 through the second connecting piece 13, the device can respectively fix the single-screw head 02 and the pressure taking control valve 01 when in use, thereby preventing the pressure taking control valve 01 from tripping and flying out during grease injection and greatly reducing the potential safety hazard.
The following details the specific structure and operation principle of each part in the device:
in a possible design, two clamping plates 11 are made of steel plates, so that the fastening force of the clamping plates 11 can be improved, and the service life can be prolonged.
In one possible design, two opposing faces of the clamping plates 11 are provided with circular arc-shaped recesses 111 for receiving the monofilament heads 02.
The shape of the two circular arc-shaped grooves 111 is matched with the shape of the monofilament head 02, and the two circular arc-shaped grooves are used for clamping and fixing the monofilament head 02 and preventing the monofilament head 02 from being separated from the clamping plate 11 under the action of huge pressure.
In one possible design, the circular arc-shaped groove 111 is provided with an anti-skid rubber pad 112.
In this embodiment, since the outer portion of the monofilament head 02 is smooth and cylindrical, the anti-slip rubber pad 112 can prevent the monofilament head 02 from slipping off when the clamping unit 1 clamps the monofilament head 02.
In one possible embodiment, the first connecting element 12 is a first adjusting screw; the second connecting member 13 is a second adjusting bolt.
Wherein, first adjusting bolt's effect does: the two holding plates 11 are fixed by passing through the two holding plates 11, thereby fixing the monofilament head 02 and preventing the monofilament head 02 from being separated from the holding unit 1 by pressure.
The second adjusting bolt has the functions of: the clamping unit 1 and the greasing unit 2 are connected, so that the pressure taking control valve 01 and the monofilament head 02 are fixed, and the monofilament head 02 is further prevented from being separated from the pressure taking control valve 01 under pressure.
In this embodiment, the number of the first adjusting bolts may be two, and the first adjusting bolts are respectively disposed at two end portions of the clamping unit 1, so that the two ends are stressed uniformly, that is, the two sides of the monofilament head 02 are stressed uniformly.
In this embodiment, the number of the second adjusting bolts may be two, and the two second adjusting bolts are respectively disposed at two ends of the clamping unit 1 and the grease injecting unit 2, so that the two ends are stressed uniformly, that is, the second adjusting bolts are stressed uniformly.
In a possible design, a through hole 121 is formed in the position of the first adjusting bolt between the two clamping plates 11, a first end of the second adjusting bolt is connected with the grease injection nozzle pressing plate 21, a second end of the second adjusting bolt is inserted into the through hole 121, and the size of the through hole 121 is matched with that of the second adjusting bolt.
In this embodiment, the first adjusting bolt is used to connect the two clamping plates 11, and the through hole 121 is opened on the first adjusting bolt between the two clamping plates 11, so that the second adjusting bolt can just pass through the through hole 121, and the second adjusting bolt can be connected with the central axis of the clamping unit 1, so that the connection is more stable.
In this embodiment, for the size according to different mainlines adjust the distance between two grip blocks 11 to and adjust the width between clamping unit 1 and the notes fat unit 2, and make the connection more firm, can all be provided with adjusting nut in this first adjusting bolt and second adjusting bolt's bottom.
In a possible design, the grease injection nozzle 22 and the grease injection nozzle pressing plate 21 are rotatably connected, so that the flexibility of the grease injection nozzle 22 can be improved, and the connection between the grease injection nozzle 22 and the pressure taking control valve 01 can be realized by rotating the grease injection nozzle 22 on the premise of ensuring sealing.
In this embodiment, in order to realize that the grease injection nozzle 22 is locked in the opening 211 of the grease injection nozzle pressing plate 21 and prevent the grease injection nozzle 22 from being removed from the opening 211 due to the pressure from the pressure taking control valve 01, the grease injection nozzle 22 may have a plurality of possible structures, and the common characteristic of the plurality of possible structures is that the grease injection nozzle 22 has a grease injection passage inside, one end of which is used for inputting sealing grease and the other end of which is used for outputting sealing grease to the pressure taking control valve 01, and two of them are taken as examples and explained below:
the first method comprises the following steps: referring to fig. 4, in one possible design, the grease nozzle 22 is provided with a snap ring 221, and the diameter of the snap ring 221 is larger than the diameter of the opening 211 for snap-fitting inside the grease nozzle pressure plate 21.
Based on the above structure, when the grease injection nozzle 22 is in operation and is subjected to pressure from the pressure taking control valve 01, the grease injection nozzle 22 will not fall off from the opening 211 of the grease injection nozzle pressing plate 21.
Further, the inner end 223 of the grease injecting nozzle 22 is provided with an external thread for connecting the pressure taking control valve 01, and the outer end is provided with an internal thread for connecting a grease injecting gun.
And the second method comprises the following steps: in a possible design, the outer end 222 of the grease injecting nozzle 22 is inserted into the opening 211, the inner end 223 of the grease injecting nozzle 22 is provided with a grease injecting port, the grease injecting port is connected with the air outlet of the pressure taking control valve 01 through threads, the outer diameter of the inner end 223 of the grease injecting nozzle 22 is larger than that of the outer end 222, and the joint of the inner end 223 and the outer end 222 forms a step surface.
Based on the above structure, the step surface functions as a locking function on the inner side of the grease injection nozzle pressing plate 21, and prevents the grease injection nozzle 22 from falling off from the inner side of the grease injection nozzle pressing plate 21 when the grease injection nozzle 22 is pressed by the pressure control valve 01 during operation.
In one possible design, the outer end 222 of the nozzle 22 is circular and the shape of the opening 211 is adapted to the shape of the outer end 222 of the nozzle 22, i.e. the opening 211 is also circular, which facilitates the rotation of the nozzle 22 in the opening 211 and increases the flexibility of the nozzle 22.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.
The pipe thread plugging device provided by the embodiment of the application comprises a clamping unit 1 and a grease injection unit 2, wherein the clamping unit 1 is positioned at one end of an air inlet of a pressure taking control valve 01, the grease injection unit 2 is positioned at one end of an air outlet of the pressure taking control valve 01, and the pressure taking control valve 01 is connected with a main line pressure taking connecting end through a single-thread head 02; the clamping unit 1 comprises two clamping plates 11, the monofilament head 02 is clamped between the middle parts of the two clamping plates 11, first connecting pieces 12 are arranged at two ends of each of the two clamping plates 11, and the first connecting pieces 12 are used for connecting the two clamping plates 11 and providing clamping force for the clamping plates 11, so that the clamping unit 1 and the monofilament head 02 are relatively fixed when in use; the grease injection unit 2 comprises a grease injection nozzle pressing plate 21, the middle part of the grease injection nozzle pressing plate 21 is provided with an opening 211, a grease injection nozzle 22 is inserted into the opening 211, and a grease injection port of the grease injection nozzle 22 is in threaded connection with an outlet of the pressure taking control valve 01, so that the grease injection unit 2 and the pressure taking control valve 01 are relatively fixed when in use; because the clamping unit 1 is connected with the grease injection unit 2 through the second connecting piece 13, the device can respectively fix the single screw head 02 and the pressure taking control valve 01 when in use, thereby preventing the pressure taking control valve 01 from tripping and flying out during grease injection and greatly reducing potential safety hazards.
In this embodiment, in the process of injecting grease into the pressure control valve 01, a wrench can be used to clamp the pressure control valve 01 and drive the pressure control valve 01 to rotate back and forth, so that the tightness of the connection between the pressure control valve 01 and the monofilament head 02 is achieved, and at this time, the sealing grease injected into the pressure control valve 01 can be caused to leak out from the connection position between the pressure control valve 01 and the monofilament head 02, and the sealing grease is applied to the whole threaded connection position, so that the sealing repair of the leakage point is achieved.
Fig. 5 is a flow chart of a pipe thread plugging method provided in an embodiment of the present application, please refer to fig. 5, the method is applied to a pipe thread plugging device provided in any one of the above possible designs, and the method includes:
501. when leakage occurs at the threaded connection position of the pressure taking control valve 01 of the pressure taking device and the single-screw head 02 on the gas transmission pipeline, the pressure taking control valve 01 is closed, and a pressure gauge joint at the gas outlet of the pressure taking control valve 01 is detached.
502. The grease injection port at the inner end 223 of the grease injection nozzle 22 of the pipe thread plugging device is connected with the air outlet of the pressure taking control valve 01.
503. The monofilament head 02 is held by two holding plates 11.
504. Two first connecting pieces 12 are respectively used for connecting two ends of the two clamping plates 11 and providing clamping force for the clamping plates 11.
505. Two second connectors 13 between the grease injection nozzle pressing plate 21 and the two first connectors 12 are fastened.
506. The grease gun is connected to the outer end 222 of the grease nipple 22 on the pipe thread plugging device.
507. The pressure control valve 01 is opened and the threaded connection between the pressure control valve 01 and the monofilament head 02 is loosened.
508. The sealing grease was injected into the pressure control valve 01 through the grease injection port of the grease injection nozzle 22 at a predetermined pressure using a grease injection gun.
509. The wrench is clamped on the pressure taking control valve 01 and drives the pressure taking control valve 01 to rotate back and forth, so that the threaded connection between the pressure taking control valve 01 and the monofilament head 02 rotates relatively, sealing grease enters the threaded connection, and a leakage point of the threaded connection is sealed.
510. When the leakage point stops leaking, the pressure taking control valve 01 is closed, and the pipe thread plugging device is detached.
511. The pressure gauge joint is installed at the air outlet of the pressure taking control valve 01, and the pressure taking control valve 01 is opened.
According to the technical scheme provided by the embodiment of the application, the monofilament head 02 is clamped by the two clamping plates 11, and the two ends of the two clamping plates 11 are connected through the first connecting piece 12, so that the clamping plates 11 and the monofilament head 02 are relatively fixed in use; the grease injection nozzle 22 arranged on the grease injection nozzle pressing plate 21 is connected with the pressure taking control valve 01, so that the grease injection nozzle 22 and the pressure taking control valve 01 are relatively fixed in use; because this first connecting piece 12 chews the clamp plate 21 through second connecting piece 13 and notes fat and connects, under the condition that need not the gassing, can annotate the fat through the mode that monofilament head 02 and pressure taking control valve 01 are fixed respectively, consequently need not to annotate the fat through the mode of unloading the natural gas, has better economic benefits, also can not cause harm to the environment.
In a possible realization mode, the grease filling port at the inner end 223 of the grease filling nozzle 22 of the pipe thread leakage plugging device is connected with the air outlet of the pressure taking control valve 01 through threads.
In one possible implementation, the clamping of the monofilament head 02 using two clamping plates 11 comprises:
the two clamping plates 11 are used for clamping the monofilament head 02 by circular arc-shaped grooves 111.
In a possible implementation manner, the two first connecting members 12 are respectively used to connect two ends of the two clamping plates 11 and provide clamping force for the clamping plates 11, and the method includes:
the distance between the two clamping plates 11 is shortened by screwing the nuts at the two ends of the first connecting member 12, thereby providing a clamping force for the clamping plates 11.
In a possible realisation, the two second connectors 13, between the fastening grease injection nozzle-holder plate 21 and the two first connectors 12, comprise:
the distance between the grease injection nozzle pressing plate 21 and the two first connecting pieces 12 is shortened by screwing the nuts at the two ends of the second connecting piece 13.
In one possible implementation, the amount of sealing grease injected into the pressure-taking control valve 01 is greater than the volume of the pressure-taking control valve 01.
In one possible implementation manner, the wrench is clamped on the pressure control valve 01 and drives the pressure control valve 01 to rotate back and forth, so that the threaded connection between the pressure control valve 01 and the monofilament head 02 rotates relatively, and the method comprises the following steps:
tightening the pressure control valve 01 to reduce the space inside the pressure control valve 01 and press the sealing grease into the connection position between the pressure control valve 01 and the monofilament head 02;
moving the pressure control valve 01 a predetermined distance in a direction away from the monofilament head 02 by unscrewing the pressure control valve 01, thereby providing a space for sealing grease inside the pressure control valve 01;
sealing grease is injected into the internal space of the pressure control valve 01.
In a possible implementation manner, when the leakage point stops leaking, after closing the pressure control valve 01 and disassembling the pipe thread leakage stopping device, the method further comprises:
and (4) sealing the outer side of the repaired leakage point by using glue.
In one possible implementation, the glue is a two-component glue.
In a possible implementation manner, before the pressure gauge joint is installed at the air outlet of the pressure taking control valve 01 and the pressure taking control valve 01 is opened, the method further comprises the following steps:
and cleaning the excess sealant outside the pressure taking control valve 01.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.
Fig. 6 is a flow chart of a pipe thread plugging method provided in an embodiment of the present application, please refer to fig. 6, the method is applied to a pipe thread plugging device provided in any one of the above possible designs, and the method includes:
601. when the threaded connection part of the pressure taking control valve 01 of the pressure taking device and the single-screw head 02 on the gas transmission pipeline leaks, the pressure taking control valve 01 is closed, and a pressure gauge joint at the gas outlet of the pressure taking control valve 01 is detached.
Wherein, closing pressure taking control valve 01 can prevent that the natural gas from leaking, dismantle the manometer gauge outfit and can provide the space for subsequent pipe thread plugging device's installation, can not cause the leakage of natural gas simultaneously.
602. The grease injection port at the inner end 223 of the grease injection nozzle 22 of the pipe thread leakage plugging device is connected with the air outlet of the pressure taking control valve 01 through threads.
In this step, the pipe thread plugging device is integrated, and the grease injection port of the grease injection nozzle 22 in the pipe thread plugging device is installed on the equipment needing grease injection in the operation field, that is, the grease injection port of the grease injection nozzle 22 is connected with the air outlet of the pressure taking control valve 01 through threads, and the threads are connected in a manner convenient for disassembly and assembly.
603. The two clamping plates 11 are used for clamping the monofilament head 02 by circular arc-shaped grooves 111.
The shape of the circular arc-shaped grooves 111 on the two clamping plates 11 is matched with the shape of the monofilament head 02, and the circular arc-shaped grooves are used for clamping and fixing the monofilament head 02 and preventing the monofilament head 02 from being separated from the clamping plates 11 under the action of huge pressure.
In one possible design, the arc-shaped groove 111 is provided with an anti-slip rubber pad 112. In this embodiment, since the outer portion of the monofilament head 02 is smooth and cylindrical, the anti-slip rubber pad 112 can prevent the monofilament head 02 from slipping off when the clamping unit 1 clamps the monofilament head 02.
604. The distance between the two clamping plates 11 is shortened by screwing the nuts at the two ends of the first connecting member 12, thereby providing a clamping force for the clamping plates 11.
In this step, the two clamping plates 11 may be respectively adjacent to the filament head 02 from both ends of the filament head 02, and then combined and connected by the first connecting members 12 at both ends.
Specifically, the first connecting members 12 may be first connecting bolts, and nuts are further disposed on two ends of each first connecting bolt for fastening the first connecting bolt, so as to provide a clamping force for the clamping plate 11, so as to better fix the single-screw head 02.
605. The distance between the grease injection nozzle pressing plate 21 and the two first connecting pieces 12 is shortened by screwing nuts at both ends of the second connecting piece 13.
In this step, the second connecting member 13 functions to: the clamping plate 11 and the grease injection nozzle pressing plate 21 are connected to fix the pressure control valve 01 and the monofilament head 02, thereby further preventing the monofilament head 02 from being separated from the pressure control valve 0101 by pressure.
606. The grease gun is connected to the outer end 222 of the grease nozzle 22 on the pipe thread plugging device.
Wherein, this annotate fat rifle can provide pressure for annotating the fat process to promote the going on smoothly of annotating the fat process.
607. The pressure control valve 01 is opened, and the threaded connection between the pressure control valve 01 and the monofilament head 02 is loosened.
In this step, a wrench is used to clamp the pressure control valve 01 and loosen the pressure control valve 01, so that the pressure control valve 01 moves a certain distance in a direction away from the monofilament head 02, thereby providing a larger space for the sealing grease inside the pressure control valve 01.
608. The grease gun is used to inject sealing grease into the pressure control valve 01 through the grease injection port of the grease injection nozzle 22 at a predetermined pressure.
The preset pressure may be set according to actual needs, which is not limited in this embodiment.
The sealing grease is a chemical substance used for sealing and insulating valves and O-shaped rings on power equipment, has two forms of liquid and solid, has the use temperature ranging from 50 ℃ to 210 ℃, and has the advantages of good water-resistant sealing property and good electrical appliance insulation property of mineral oil resistance and most chemicals resistance. The sealing grease is injected into the pressure control valve 01 through the grease injection nozzle 22, and flows to the threaded connection between the pressure control valve 01 and the monofilament head 02 through the pressure control valve 01, thereby performing a sealing function at the threaded connection.
In one possible embodiment, the amount of sealing grease injected into the pressure-taking control valve 01 is greater than the volume of the pressure-taking control valve 01, so that the sealing grease is pressed into the threaded connection.
609. The pressure control valve 01 is tightened to reduce the space inside the pressure control valve 01, and the sealing grease is pressed into the connection position between the pressure control valve 01 and the monofilament head 02.
Specifically, by loosening the pressure control valve 01, moving the pressure control valve 01 a certain distance in a direction away from the filament head 02, thereby providing a larger space for the sealing grease inside the pressure control valve 01, injecting the sealing grease into the pressure control valve 01, then tightening the pressure control valve 01, the space inside the pressure control valve 01 becomes smaller, and because of the pressure of the grease injection at the rear end of the grease injection nozzle 22, the sealing grease that has been injected into the pressure control valve 01 does not return to the grease injection nozzle 22, but is pressed into the connection position between the pressure control valve 01 and the filament head 02, and thereafter repeating the above process, a sufficient amount of sealing grease can be injected into the connection position between the pressure control valve 01 and the filament head 02, thereby applying the sealing grease to the entire threaded connection position.
610. By loosening the pressure control valve 01, the pressure control valve 01 is moved a predetermined distance in a direction away from the monofilament head 02, thereby providing a space for the sealing grease inside the pressure control valve 01.
611. A sealing grease is injected into the internal space of the pressure control valve 01.
612. When the leakage point stops leaking, the pressure taking control valve 01 is closed, and the pipe thread plugging device is disassembled.
613. And (5) sealing the outer side of the repaired leakage point by using glue.
This step may further seal the leak.
In one possible implementation, the glue is a two-component glue, e.g., epoxy, polyurethane or 2 nd generation acrylic glue, in two packages, a resin and a hardener, which are mixed just before use.
614. And cleaning the excess sealant outside the pressure taking control valve 01.
In this step, the excess sealant is removed to prevent clogging.
615. The pressure gauge joint is installed at the air outlet of the pressure taking control valve 01, and the pressure taking control valve 01 is opened.
After this step, production can be resumed.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.
According to the technical scheme provided by the embodiment of the application, the two clamping plates 11 are used for clamping the monofilament head 02, and the two ends of the two clamping plates 11 are connected through the first connecting piece 12, so that the clamping plates 11 and the monofilament head 02 are relatively fixed in use; the grease injection nozzle 22 arranged on the grease injection nozzle pressing plate 21 is connected with the pressure taking control valve 01, so that the grease injection nozzle 22 and the pressure taking control valve 01 are relatively fixed in use; because this first connecting piece 12 is chewed the clamp plate 21 through second connecting piece 13 and notes fat and is connected, under the condition that need not the gassing, can annotate the fat through the mode that single-filament head 02 and pressure control valve 01 are fixed respectively, consequently need not to annotate the fat through the mode of unloading natural gas, has better economic benefits, also can not cause harm to the environment.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method for plugging a pipe thread, the method comprising:
when the threaded connection part of a pressure taking control valve (01) of the pressure taking device and a single-thread head (02) on a gas transmission pipeline leaks, the pressure taking control valve (01) is closed, and a pressure gauge joint at the gas outlet of the pressure taking control valve (01) is detached;
connecting a grease injection port at the inner end (223) of a grease injection nozzle (22) of the pipe thread plugging device with an air outlet of the pressure taking control valve (01);
clamping the monofilament head (02) by using two clamping plates (11);
two first connecting pieces (12) are respectively connected with two ends of the two clamping plates (11) and provide clamping force for the clamping plates (11);
two second connecting pieces (13) between the grease injection nozzle pressing plate (21) and the two first connecting pieces (12) are fastened;
connecting a grease injection gun with the outer end (222) of a grease injection nozzle (22) on the pipe thread plugging device;
opening the pressure taking control valve (01), and loosening the threaded connection between the pressure taking control valve (01) and the single-screw head (02);
injecting sealing grease into the pressure taking control valve (01) through a grease injection port of a grease injection nozzle (22) at a preset pressure by using a grease injection gun;
clamping the pressure taking control valve (01) by using a wrench, and driving the pressure taking control valve (01) to rotate back and forth, so that the threaded connection between the pressure taking control valve (01) and the monofilament head (02) rotates relatively, sealing grease is promoted to enter the threaded connection, and a leakage point of the threaded connection is sealed;
when the leakage point stops leaking, closing the pressure taking control valve (01), and disassembling the pipe thread plugging device;
and installing the pressure gauge joint at the air outlet of the pressure taking control valve (01), and opening the pressure taking control valve (01).
2. A pipe thread plugging method according to claim 1, wherein said clamping said monofilament head (02) using two clamping plates (11) comprises:
and clamping the monofilament head (02) by using the circular arc-shaped groove (111) on the clamping plate (11).
3. The pipe thread plugging method according to claim 1, wherein a grease injection port of an inner end (223) of a grease injection nozzle (22) of the pipe thread plugging device is in threaded connection with an air outlet of the pressure control valve (01).
4. A pipe thread leakage plugging method according to claim 1, wherein said connecting both ends of said two clamping plates (11) respectively by using two first connecting members (12) and providing clamping force to said clamping plates (11) comprises:
the distance between the two clamping plates (11) is shortened by screwing the nuts at the two ends of the first connecting piece (12), so that the clamping force is provided for the clamping plates (11).
5. A method for plugging a pipe thread according to claim 1, wherein said two second connections (13) between said fastening grease-injection nozzle-presser (21) and said two first connections (12) comprise:
and the distance between the grease injection nozzle pressing plate (21) and the two first connecting pieces (12) is shortened by screwing nuts at two ends of the second connecting piece (13).
6. A pipe thread plugging method according to claim 1, wherein an amount of sealing grease injected into said pressure-taking control valve (01) is larger than a volume of said pressure-taking control valve (01).
7. A pipe thread leakage plugging method according to claim 1, wherein said using a wrench to clamp on the pressure control valve (01) and drive the pressure control valve (01) to rotate back and forth to rotate the threaded connection between the pressure control valve (01) and the monofilament head (02) relatively, comprises:
tightening the pressure taking control valve (01) to reduce the space in the pressure taking control valve (01) and press sealing grease into the connection position between the pressure taking control valve (01) and the monofilament head (02);
moving the pressure taking control valve (01) a preset distance in a direction away from the monofilament head (02) by unscrewing the pressure taking control valve (01), thereby providing a space for sealing grease again inside the pressure taking control valve (01);
and injecting sealing grease into the internal space of the pressure taking control valve (01).
8. A pipe thread plugging method according to claim 1, wherein after said closing a pressure control valve (01) when said leakage point stops leaking and disassembling said pipe thread plugging device, said method further comprises:
and (4) sealing the outer side of the repaired leakage point by using glue.
9. A method for stopping leakage of pipe threads as claimed in claim 8, wherein the glue is a two-component glue.
10. The pipe thread plugging method according to claim 1, wherein before installing the pressure gauge joint at an air outlet of the pressure taking control valve (01) and opening the pressure taking control valve (01), the method further comprises:
and cleaning the redundant sealant outside the pressure taking control valve (01).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110167813.XA CN114909540A (en) | 2021-02-07 | 2021-02-07 | Pipe thread plugging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110167813.XA CN114909540A (en) | 2021-02-07 | 2021-02-07 | Pipe thread plugging method |
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| CN114909540A true CN114909540A (en) | 2022-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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