CN112628511A - Electric smelting bypass saddle pipe fitting capable of recovering drilling tool under pressure without stopping gas - Google Patents
Electric smelting bypass saddle pipe fitting capable of recovering drilling tool under pressure without stopping gas Download PDFInfo
- Publication number
- CN112628511A CN112628511A CN202011389658.8A CN202011389658A CN112628511A CN 112628511 A CN112628511 A CN 112628511A CN 202011389658 A CN202011389658 A CN 202011389658A CN 112628511 A CN112628511 A CN 112628511A
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- Prior art keywords
- drilling
- bypass
- pipeline
- saddle
- sealing ring
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- 238000005553 drilling Methods 0.000 title claims abstract description 123
- 238000003723 Smelting Methods 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 121
- 238000003466 welding Methods 0.000 claims abstract description 23
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000008646 thermal stress Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 29
- 239000004698 Polyethylene Substances 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- -1 Polyethylene Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
- F16L47/28—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe
- F16L47/30—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe using attaching means embracing the pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
- F16L47/03—Welded joints with an electrical resistance incorporated in the joint
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
- F16L47/28—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe
- F16L47/285—Joining pipes to walls or to other pipes, the axis of the joined pipe being perpendicular to the wall or to the axis of the other pipe with fluid cut-off means in the branching 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
- F16L47/34—Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Pipe Accessories (AREA)
Abstract
The invention provides an electric smelting bypass saddle-shaped pipe fitting capable of recovering a drilling tool under pressure without stopping gas, wherein the electric smelting bypass saddle-shaped pipe fitting is used for connecting a main gas pipeline and comprises a bypass main body, the bypass main body comprises a drilling pipeline and a bypass branch pipe communicated with the drilling pipeline, one end of the drilling pipeline is provided with a saddle-shaped pipeline connecting part, the pipeline connecting part is provided with a saddle-shaped arc welding surface, a pipe hole is formed in the saddle-shaped arc welding surface of the drilling pipeline, the drilling tool is arranged at the other end of the drilling pipeline, a sealing cover is arranged at a corner part connected with the bypass branch pipe in the drilling pipeline, one end of the sealing cover is rotatably connected with the drilling pipeline through a rotating shaft, the sealing cover divides the drilling pipeline into a drilling tool cavity and a saddle pipe cavity after being sealed, and the saddle pipe cavity is communicated with the bypass branch pipe, and a torsional spring which enables the sealing cover to have the tendency of sealing the drilling cutter cavity is arranged at the rotating shaft.
Description
Technical Field
The invention belongs to the technical field of electric smelting bypass saddle-shaped pipe fittings, and particularly relates to an electric smelting bypass saddle-shaped pipe fitting capable of recovering a drilling tool under pressure without stopping gas.
Background
Natural gas is one of clean and efficient energy sources in cities, and the most convenient conveying mode is pipeline conveying. Compared with metal gas transmission and distribution pipelines, the Polyethylene (PE) gas pipeline has the comprehensive advantages of stable mechanical property, chemical corrosion resistance, weldability, environmental protection, long service life, light weight, easy processing and forming, low transportation and installation cost and the like, has the popularization rate of over 90 percent in the countries such as British, Denmark, France and the like, and is also popularized and applied in large quantities in newly built medium-pressure and low-pressure gas transmission and distribution pipelines in China. However, one of the important problems in the practical use of the pipeline made of the material is the technical problem of connecting the operated pipeline with the newly-built branch pipeline. According to the requirements of CJJ63-2018 polyethylene gas pipeline engineering technical standard, PE gas pipeline connection adopts electric melting connection (electric melting bearing connection and electric melting saddle connection) or hot melting connection, and threaded connection and bonding are not adopted. The electric smelting bypass saddle-shaped connection is a common mode in the gas pipeline pressure-bearing non-stop connection.
The structural parts of the conventional PE electric melting bypass saddle-shaped pipe fitting (saddle pipe for short) comprise an electric melting cover cap, a sealing ring, a bypass main body, a drilling tool, a tool support body and electric heating wires, wherein the wires of the electric heating wires on the saddle pipe are circular wires on a spatial cylindrical surface, and the wire distances of the electric heating wires in all directions are the same. The method for connecting the main gas pipeline with pressure without stopping gas comprises the following working principles: firstly, the saddle pipe is bound on a main gas pipeline, at the moment, the electric heating wire is electrified, the electric heating wire generates heat to melt PE materials to enable the saddle pipe and the main gas pipeline to be welded together, gas-uninterrupted tapping under pressure is needed after welding is completed, at the moment, a drilling tool descends through thread fit rotation and drills a hole on the main gas pipeline, sealing rings are guaranteed to seal all leakage channels between the tool and a tool support body, between the tool support body and a bypass main body in the process, the tool is screwed up after a hole is drilled, and an electric melting cap is covered, so that the gas-uninterrupted tapping under pressure is completed.
The existing drilling tool is not generally dismantled due to fear of leakage of gas under pressure, and is directly left in a saddle pipe, so that resource waste is caused.
Disclosure of Invention
The invention aims to solve the technical problem and provides an electric melting bypass saddle-shaped pipe fitting capable of recovering a drilling tool under pressure without stopping gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
an electric smelting bypass saddle-shaped pipe fitting which can recover a drilling tool without stopping gas under pressure is used for connecting a main gas pipeline, the electric smelting bypass saddle-shaped pipe fitting comprises a bypass main body, the bypass main body comprises a drilling pipeline and a bypass branch pipe communicated with the drilling pipeline, one end of the drilling pipeline is provided with a saddle-shaped pipeline connecting part which is provided with a saddle-shaped arc welding surface, the drilling pipeline is provided with a pipe hole on the saddle-shaped arc welding surface, the other end of the drilling pipeline is provided with a drilling tool, a sealing cover is arranged at the corner connected with the bypass branch pipe in the drilling pipeline, one end of the sealing cover is rotationally connected with the drilling pipeline through a rotating shaft, the drilling pipeline is divided into a drilling tool cavity and a saddle pipe cavity after the sealing cover is closed, the saddle pipe cavity is communicated with the bypass branch pipe, and a torsional spring which enables the sealing cover to have the tendency of sealing the drilling tool cavity is arranged at the rotating shaft.
Preferably, the sealing cover is provided with a support bracket, and when the sealing cover rotates to the pipe orifice of the bypass branch pipe, the support bracket is supported on the bypass branch pipe, so that the sealing cover does not block the bypass branch pipe.
Preferably, the closing cap includes closing plate portion and plunger portion, the drilling pipeline is equipped with and is used for spacingly the spacing face of closing plate portion, plunger portion with the drilling pipeline internal diameter suits, on the closing plate portion with spacing face department of contact is equipped with round sixth sealing washer mounting groove, install the sixth sealing washer in the sixth sealing washer mounting groove, plunger portion with drilling pipeline inner wall department of contact is equipped with round seventh sealing washer mounting groove, install the seventh sealing washer in the seventh sealing washer mounting groove.
Preferably, the sealing cover is provided with a buckle, and the drilling pipeline is provided with a clamping groove corresponding to the buckle.
Preferably, the electric smelting bypass saddle-shaped pipe fitting further comprises a cutter bracket and a bypass cap, the drilling cutter is installed on the cutter bracket, the cutter bracket is provided with a cylindrical groove which is communicated up and down, the groove wall of the cylindrical groove is provided with threads for connecting the drilling cutter, a circle of cutter bracket supporting groove is arranged at the pipe orifice of the drilling pipeline, the cutter bracket comprises a first circular cylinder body, a second circular cylinder body and a third circular cylinder body which are sequentially arranged from top to bottom, the diameter of the first circular cylinder body is matched with that of the cutter bracket supporting groove, the diameter of the second circular cylinder body is matched with that of the drilling pipeline, the diameter of the third circular cylinder body is smaller than that of the drilling pipeline, the first circular cylinder body is provided with a circle of first sealing ring installing groove, a first sealing ring is installed in the first sealing ring installing groove, and the second circular cylinder body is provided with a circle of second sealing ring installing groove, and a second sealing ring is arranged in the second sealing ring mounting groove.
Preferably, the cross section of the bypass cap is in a concave shape, the bypass cap is in gapless fit with the cutter bracket and the drilling pipeline, a circle of third sealing ring mounting groove is formed in the bottom surface inside the bypass cap, and a third sealing ring is mounted in the third sealing ring mounting groove.
Preferably, the drilling tool is provided with a circle of fourth sealing ring mounting groove and a circle of fifth sealing ring mounting groove respectively at the upper part and the lower part of the cylindrical surface matched with the cylindrical groove, and a fourth sealing ring and a fifth sealing ring are respectively mounted in the fourth sealing ring mounting groove and the fifth sealing ring mounting groove.
Preferably, the saddle-shaped arc welding surface is provided with heating wires which are distributed in a spiral manner, the heating wires are distributed in an elliptic spiral line manner, and the long axis of the elliptic spiral line is parallel to the generatrix of the saddle-shaped arc welding surface.
Preferably, the bypass body is provided with temperature-controlled shape memory alloys on two sides of the pipe hole, the temperature-controlled shape memory alloys are arranged inside the pipe connecting part, and the direction of thermal deformation of the temperature-controlled shape memory alloys is opposite to the direction of thermal stress deformation of the pipe connecting part.
After the technical scheme is adopted, the invention has the following advantages:
according to the electric melting bypass saddle-shaped pipe fitting, the sealing cover is arranged inside the saddle-shaped pipe fitting and used for sealing the inlet of a drilling tool under the action of the elastic force of the torsion spring; when the hole is to be opened after the welding is finished, the drilling tool descends to push the sealing cover open, and after the drilling tool finishes drilling, pressure gas can enter the cavity of the saddle-shaped pipe fitting; after the drilling tool is lifted, the sealing cover is closed towards the tool inlet due to the elastic force of the torsion spring, the sealing cover can automatically seal the tool inlet, the tool can be recovered at this time, and the bypass cover cap is immediately covered on the drilling pipeline after the tool is recovered, so that the drilling tool can be recovered under pressure without stopping air.
Drawings
FIG. 1 is a schematic view of an installation structure of an electric melting bypass saddle pipe fitting for recovering a drilling tool without stopping gas under pressure according to the present invention;
FIG. 2 is an exploded view of an electrofusion bypass saddle pipe fitting for recovering a drilling tool under pressure without stopping gas supply according to the present invention;
FIG. 3 is a cross-sectional view of an electrofusion bypass saddle pipe fitting for recovering a drilling tool under pressure without stopping gas supply in accordance with the present invention;
FIG. 4 is an enlarged view of an electrofusion bypass saddle pipe fitting for recovering a drilling tool under pressure without stopping gas supply, at a sealing cover, according to the present invention;
FIG. 5 is a schematic view of the structure of an electrofusion bypass saddle pipe fitting on a saddle-shaped arc welding surface of the drilling tool for recovering the drilling tool under pressure without stopping gas supply according to the present invention;
in the figure:
1-a main gas pipeline; 2-a bypass body; 21-drilling a pipeline; 211-a pipe connection; 212-pore of pipe; 213-tool holder support groove; 214-card slot; 22-a bypass branch; 3-drilling a cutter; 4-a tool holder; 41-a circular cylinder I; 42-a circular cylinder II; 43-circular cylinder three; 44-cylindrical grooves; 5-a bypass cap; 6-sealing the cover; 61-resting; 62-a cover plate portion; 63-a plunger portion; 64-buckling; 7-a first sealing ring; 8-a second sealing ring; 9-a third sealing ring; 10-a fourth seal ring; 11-a fifth sealing ring; 12-torsion spring; 13-sixth sealing ring; 14-a seventh sealing ring; 15-electric heating wire; 16-temperature controlled shape memory alloy.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific examples.
As shown in fig. 1-5, an electric smelting bypass saddle pipe fitting for recovering a drilling tool without stopping gas under pressure is used for connecting a main gas pipeline 1, and comprises a bypass main body 2, a drilling tool 3, a tool bracket 4 and a bypass cap 5.
The bypass body 2 includes a bore pipe 21 and a bypass branch pipe 22 communicating with the bore pipe 21. One end of the drilling pipeline 21 is provided with a saddle-shaped pipeline connecting part 211, the pipeline connecting part 211 is provided with a saddle-shaped arc welding surface, and a pipe hole 212 is formed on the saddle-shaped arc welding surface of the drilling pipeline 21; the other end of the drilling pipeline is provided with the drilling tool 3, a tool bracket 4 and a bypass cover cap 5.
The drilling tool 3 is installed on the tool bracket 4, the tool bracket 4 is provided with a cylindrical groove 44 which is through from top to bottom, and the wall of the cylindrical groove 44 is provided with a thread for connecting the drilling tool 3.
The mouth of pipe department of drilling pipeline 21 is equipped with round cutter bracket and supports groove 213, cutter bracket 4 is including the ring cylinder one 41, two 42 and three 43 of ring cylinder that from top to bottom set gradually. The diameter of the first annular cylinder 41 is matched with that of the cutter bracket supporting groove 213; the diameter of the second circular cylinder 42 is matched with the inner diameter of the drilling pipeline 21; the diameter of the circular ring cylinder three 43 is smaller than the inner diameter of the drill pipe 21. A circle of first sealing ring mounting groove is formed in the first circular cylinder 41, and a first sealing ring 7 is mounted in the first sealing ring mounting groove; and a circle of second sealing ring mounting groove is formed in the second circular cylinder 42, and a second sealing ring 8 is mounted in the second sealing ring mounting groove.
The cross section of the bypass cover cap 5 is concave, and the bypass cover cap 5 is in gapless fit with the cutter bracket 4 and the drilling pipeline 21. And a circle of third sealing ring mounting groove is formed in the bottom surface inside the bypass cover cap 5, and a third sealing ring 9 is mounted in the third sealing ring mounting groove.
The drilling tool 3 is provided with a circle of fourth sealing ring mounting groove and a circle of fifth sealing ring mounting groove respectively on the upper part and the lower part of the cylindrical surface matched with the cylindrical groove 44, and a fourth sealing ring 10 and a fifth sealing ring 11 are respectively mounted in the fourth sealing ring mounting groove and the fifth sealing ring mounting groove.
The sealing cover 6 is provided with a support lug 61, and when the sealing cover 6 rotates to the pipe orifice of the bypass branch pipe 22, the support lug 61 is supported on the bypass branch pipe 22, so that the sealing cover 6 does not block the bypass branch pipe 22.
The sealing cover 6 comprises a sealing plate part 62 and a plunger part 63, the drilling pipeline 21 is provided with a limiting surface for limiting the sealing plate part 62, and the plunger part 63 is adapted to the inner diameter of the drilling pipeline 21. And a circle of sixth sealing ring mounting groove is formed in the position, contacted with the limiting surface, of the sealing plate part 62, and a sixth sealing ring 13 is mounted in the sixth sealing ring mounting groove. And a circle of seventh sealing ring installation groove is formed in the position, contacted with the inner wall of the drilling pipeline 21, of the plunger part 63, and a seventh sealing ring 14 is installed in the seventh sealing ring installation groove.
The seal cover 6 is provided with a buckle 64, and the drilling pipeline 21 is provided with a clamping groove 214 corresponding to the buckle 64.
The heating wires 15 are arranged on the saddle-shaped arc welding surface in a spiral distribution mode, the heating wires 15 are arranged in an elliptical spiral line mode, and the long axis of the elliptical spiral line is parallel to the generatrix of the saddle-shaped arc welding surface. The heating wire 15 is arranged in the form of an elliptical spiral line, and the elliptical distribution wires can be distributed in a homogenized temperature field, because the wire spacing of the elliptical distribution wires is changed, the temperature for increasing the wire spacing is reduced, and the temperature for reducing the wire spacing is increased, so that the temperature homogenization can be realized by controlling the change of the wire spacing of the elliptical distribution wires. This improves the quality of the weld and also reduces uneven thermal stress deformation.
The bypass main body 2 is provided with temperature-controlled shape memory alloys 16 on two sides of the pipe hole 212, the temperature-controlled shape memory alloys 16 are arranged inside the pipe connecting part 211, and the direction of thermal deformation of the temperature-controlled shape memory alloys 16 is opposite to the direction of thermal stress deformation of the pipe connecting part 211. The temperature control shape memory alloy which is an advanced intelligent material at present is arranged near the welding wire of the saddle pipe, when welding, the temperature rises, the temperature control shape memory alloy 16 generates deformation stress along with the temperature according to the predesigned direction, the deformation stress of the memory alloy can counteract the thermal stress when welding, the deformation stress of the memory alloy disappears when the temperature returns to the normal temperature after welding, and thus the shape is controlled.
According to the electric melting bypass saddle-shaped pipe fitting, the sealing cover 6 is arranged inside the saddle-shaped pipe fitting, and the sealing cover 6 blocks the inlet of a drilling tool under the action of the elastic force of the torsion spring 12. When the hole is ready to be opened after the welding is finished, the drilling tool 3 descends to push the sealing cover 6 open, and after the drilling tool 3 finishes drilling, pressure gas can start to enter the saddle pipe cavity at the moment, and because the sealing cover 6 is provided with the support 61 which enables the sealing cover 6 not to block the bypass branch pipe 22, the openings of the sealing cover 6 and the bypass branch pipe are not closed, and the pressure gas can enter the bypass branch pipe 22, so that the pressure of the end surfaces at the two sides of the sealing cover 6 can be balanced. After the drilling tool 2 is lifted back, the sealing cover 6 is still closed to the inlet of the drilling tool due to the elastic force of the torsion spring 12, the pressure-bearing area of the upper end face of the sealing cover 6 is smaller than that of the lower end face, the inlet of the drilling tool can be automatically blocked by the sealing cover 6 by means of the gas pressure difference and the elastic force of the torsion spring 12, and the buckle 64 on the sealing cover 6 can also be blocked with the clamping groove 214 on the drilling pipeline 21. The drilling tool 3 can be recovered at this time, and the bypass cap cover 5 is immediately sealed to close the drilling pipeline 21 after the drilling tool 3 is recovered, so that the drilling tool 3 can be recovered under pressure without stopping air supply.
In order to realize the installability of the sealing cover 6, the original bypass main body 2 is split into two parts, one part is a drilling pipeline 21, the other part is a bypass branch pipe 22, after the sealing cover 6 is installed, the bypass branch pipe 22 is welded on the drilling pipeline 21 by an electric fusion welding method, and resistance wires and electric connectors are distributed on the bypass branch pipe 22.
Other embodiments of the present invention than the preferred embodiments described above will be apparent to those skilled in the art from the present invention, and various changes and modifications can be made therein without departing from the spirit of the present invention as defined in the appended claims.
Claims (9)
1. The electric smelting bypass saddle pipe fitting capable of recovering drilling tools under pressure without stopping gas is used for connecting a main gas pipeline (1), and comprises a bypass main body (2), wherein the bypass main body (2) comprises a drilling pipeline (21) and a bypass branch pipe (22) communicated with the drilling pipeline (21), one end of the drilling pipeline (21) is provided with a saddle-shaped pipeline connecting part (211), the pipeline connecting part (211) is provided with a saddle-shaped arc welding surface, the drilling pipeline (21) is provided with a pipe hole (212) formed in the saddle-shaped arc welding surface, the other end of the drilling pipeline (21) is provided with a drilling tool (3), the electric smelting bypass saddle pipe fitting is characterized in that a sealing cover (6) is arranged at a corner part connected with the bypass branch pipe (22) in the drilling pipeline (21), one end of the sealing cover (6) is rotatably connected with the drilling pipeline (21) through a rotating shaft, the drilling pipeline (21) is divided into a drilling tool cavity and a saddle pipe cavity after the sealing cover (6) is sealed, the saddle pipe cavity is communicated with the bypass branch pipe (22), and a torsion spring (12) which enables the sealing cover (6) to have the tendency of plugging the drilling tool cavity is arranged at the rotating shaft.
2. An electrofusion bypass saddle pipe fitting for recovering drilling tools without stopping the gas under pressure according to claim 1, characterised in that the cover (6) is provided with a support lug (61), when the cover (6) is rotated to the mouth of the bypass branch pipe (22), the support lug (61) is supported on the bypass branch pipe (22) so that the cover (6) does not block the bypass branch pipe (22).
3. The electric melting bypass saddle pipe fitting capable of recovering the drilling tool without stopping gas under pressure according to claim 1, wherein the sealing cover (6) comprises a sealing plate portion (62) and a plunger portion (63), the drilling pipeline (21) is provided with a limiting surface for limiting the sealing plate portion (62), the plunger portion (63) is adapted to the inner diameter of the drilling pipeline (21), a circle of sixth sealing ring installation groove is formed in the position, contacted with the limiting surface, of the sealing plate portion (62), a sixth sealing ring (13) is installed in the sixth sealing ring installation groove, a circle of seventh sealing ring installation groove is formed in the position, contacted with the inner wall of the drilling pipeline (21), of the plunger portion (63), and a seventh sealing ring (14) is installed in the seventh sealing ring installation groove.
4. The electric melting bypass saddle pipe fitting capable of recovering the drilling tool with pressure without stopping air supply according to claim 1, 2 or 3, wherein a buckle (64) is arranged on the sealing cover (6), and a clamping groove (214) corresponding to the buckle (64) is arranged on the drilling pipeline (21).
5. The electric smelting bypass saddle pipe fitting capable of recovering the drilling tool without stopping gas under pressure according to claim 1, further comprising a tool bracket (4) and a bypass cap (5), wherein the drilling tool (3) is installed on the tool bracket (4), the tool bracket (4) is provided with a cylindrical groove (44) which is through from top to bottom, the groove wall of the cylindrical groove (44) is provided with a thread for connecting the drilling tool (3), the orifice of the drilling pipeline (21) is provided with a circle of tool bracket supporting groove (213), the tool bracket (4) comprises a first circular cylinder body (41), a second circular cylinder body (42) and a third circular cylinder body (43) which are sequentially arranged from top to bottom, the diameter of the first circular cylinder body (41) is matched with the diameter of the tool bracket supporting groove (213), and the diameter of the second circular cylinder body (42) is matched with the inner diameter of the drilling pipeline (21), the internal diameter of ring cylinder three (43) is less than the diameter of drilling pipeline (21), be equipped with the first sealing washer mounting groove of round on ring cylinder (41), install first sealing washer (7) in the first sealing washer mounting groove, be equipped with round second sealing washer mounting groove on ring cylinder two (42), install second sealing washer (8) in the second sealing washer mounting groove.
6. The electric melting bypass saddle pipe fitting capable of recovering the drilling tool under pressure without stopping gas supply according to claim 5, wherein the cross section of the bypass cap (5) is in a concave shape, the bypass cap (5) is in gapless fit with the tool bracket (4) and the drilling pipeline (21), a circle of third sealing ring installation groove is formed in the bottom surface inside the bypass cap (5), and a third sealing ring (9) is installed in the third sealing ring installation groove.
7. An electric smelting bypass saddle pipe fitting for recovering a drilling tool without stopping gas under pressure according to claim 5, wherein the drilling tool is provided with a circle of a fourth sealing ring mounting groove and a circle of a fifth sealing ring mounting groove respectively at the upper part and the lower part of the cylindrical surface matched with the cylindrical groove (44), and a fourth sealing ring (10) and a fifth sealing ring (11) are respectively mounted in the fourth sealing ring mounting groove and the fifth sealing ring mounting groove.
8. The electric melting bypass saddle-shaped pipe fitting capable of recovering the drilling tool under pressure without stopping gas supply according to claim 1, wherein the saddle-shaped arc welding surface is provided with heating wires (15) which are spirally distributed, the heating wires (15) are arranged in an elliptical spiral line, and the long axis of the elliptical spiral line is parallel to the generatrix of the saddle-shaped arc welding surface.
9. The electric smelting bypass saddle pipe fitting capable of recovering the drilling tool without stopping gas under pressure according to claim 8, wherein the bypass main body (2) is provided with temperature-controlled shape memory alloys (16) respectively at two sides of the pipe hole (212), the temperature-controlled shape memory alloys (16) are arranged inside the pipe connecting part (211), and the direction of thermal deformation of the temperature-controlled shape memory alloys (16) is opposite to the direction of thermal stress deformation of the pipe connecting part (211) when being heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389658.8A CN112628511A (en) | 2020-12-01 | 2020-12-01 | Electric smelting bypass saddle pipe fitting capable of recovering drilling tool under pressure without stopping gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011389658.8A CN112628511A (en) | 2020-12-01 | 2020-12-01 | Electric smelting bypass saddle pipe fitting capable of recovering drilling tool under pressure without stopping gas |
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| CN112628511A true CN112628511A (en) | 2021-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505519A (en) * | 2021-12-24 | 2022-05-17 | 深圳市中港建筑工程有限公司 | Fire-fighting pipeline is with pressing perforating device in area |
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| JPH074576A (en) * | 1993-04-23 | 1995-01-10 | Sekisui Chem Co Ltd | Branch pipe joint, drill and engineering method for branching sewer pipe in vaccum type sewerage system |
| JPH1089582A (en) * | 1996-09-18 | 1998-04-10 | Mitsubishi Plastics Ind Ltd | Heating mat for forming electric fusing joint |
| JP2002168390A (en) * | 2000-11-30 | 2002-06-14 | Mitsui Chemicals Inc | Electric fusion saddle joint |
| CN1687628A (en) * | 2005-04-11 | 2005-10-26 | 南塑建材塑胶制品（深圳）有限公司 | Electrocast saddle shaped plastic pipe fitting with wires laid at double-face and mfg. method thereof |
| JP2013100878A (en) * | 2011-11-09 | 2013-05-23 | Kubota-Ci Co | Fusion inner and branch saddle joint using the same |
| CN103672269A (en) * | 2013-12-11 | 2014-03-26 | 河北一塑管道制造有限责任公司 | Saddle-type bypass pressure tapping connecting device for delivery pipe |
| CN104061397A (en) * | 2014-05-08 | 2014-09-24 | 浙江庆发管业科技有限公司 | Back fabric wire electric smelting saddle type bypass |
| CN207112213U (en) * | 2017-08-10 | 2018-03-16 | 邹昱朴 | A kind of throat formula automatic flow-stop device for being easy to tap to change |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB760622A (en) * | 1952-07-02 | 1956-11-07 | Goossen Foppen | Improvements in or relating to apparatus for connecting one pipe line with another |
| JPH074576A (en) * | 1993-04-23 | 1995-01-10 | Sekisui Chem Co Ltd | Branch pipe joint, drill and engineering method for branching sewer pipe in vaccum type sewerage system |
| JPH1089582A (en) * | 1996-09-18 | 1998-04-10 | Mitsubishi Plastics Ind Ltd | Heating mat for forming electric fusing joint |
| JP2002168390A (en) * | 2000-11-30 | 2002-06-14 | Mitsui Chemicals Inc | Electric fusion saddle joint |
| CN1687628A (en) * | 2005-04-11 | 2005-10-26 | 南塑建材塑胶制品（深圳）有限公司 | Electrocast saddle shaped plastic pipe fitting with wires laid at double-face and mfg. method thereof |
| JP2013100878A (en) * | 2011-11-09 | 2013-05-23 | Kubota-Ci Co | Fusion inner and branch saddle joint using the same |
| CN103672269A (en) * | 2013-12-11 | 2014-03-26 | 河北一塑管道制造有限责任公司 | Saddle-type bypass pressure tapping connecting device for delivery pipe |
| CN104061397A (en) * | 2014-05-08 | 2014-09-24 | 浙江庆发管业科技有限公司 | Back fabric wire electric smelting saddle type bypass |
| CN207112213U (en) * | 2017-08-10 | 2018-03-16 | 邹昱朴 | A kind of throat formula automatic flow-stop device for being easy to tap to change |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114505519A (en) * | 2021-12-24 | 2022-05-17 | 深圳市中港建筑工程有限公司 | Fire-fighting pipeline is with pressing perforating device in area |
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Application publication date: 20210409 |