CN107588266B - Non-pressure-reduction opening equipment for pipe fitting - Google Patents
Non-pressure-reduction opening equipment for pipe fitting Download PDFInfo
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- CN107588266B CN107588266B CN201711078748.3A CN201711078748A CN107588266B CN 107588266 B CN107588266 B CN 107588266B CN 201711078748 A CN201711078748 A CN 201711078748A CN 107588266 B CN107588266 B CN 107588266B
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Abstract
The invention discloses non-depressurization opening equipment for a pipe fitting, which relates to the technical field of gas pipeline dial-connection branch openings and comprises two screw rods, wherein the two screw rods are arranged in parallel, and a clamping plate, a sealing plate and a positioning plate are sequentially positioned on the two screw rods from front to back; a piston cylinder is arranged between the positioning plate and the sealing plate, a piston is arranged in the piston cylinder, a tapping knife is arranged on the lower side of the piston, and the upper end of the tapping knife is connected with the lower end of the piston through a connecting rod penetrating through the sealing plate; an exhaust hole is formed in the piston cylinder in a penetrating mode and penetrates through the inner wall and the outer wall, and an exhaust valve is arranged on the exhaust hole; the piston cylinder is provided with a test hole penetrating through the inner wall and the outer wall, and the test hole is provided with an air pressure tester. The invention aims to solve the problem that the bypass pipe can be connected only by stopping the gas supply of the gas pipeline, and provides non-pressure-reduction opening equipment which is used for a pipe fitting and can be used for connecting the bypass pipe without stopping the gas supply of the gas pipeline.
Description
Technical Field
The invention relates to the technical field of gas pipeline shifting branch ports, in particular to non-pressure-reduction opening equipment for a pipe fitting.
Background
In recent years, with the rapid development of the economy of China, the urbanization progress is accelerated, the polyethylene gas pipeline is also rapidly developed, and with the construction and development of cities and towns, the situation that a pipeline needs to be perforated on an original main pipeline and a bypass pipe is connected is met. However, the influence range of the gas cut-off on the buried pipeline engineering is large, and the economic loss is large.
Disclosure of Invention
The invention aims to solve the problem that the bypass pipe can be connected only by stopping the gas supply of the gas pipeline, and provides non-pressure-reduction opening equipment which is used for a pipe fitting and can be used for connecting the bypass pipe without stopping the gas supply of the gas pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme: a non-depressurization opening device for a pipe fitting comprises two screw rods, wherein the two screw rods are arranged in parallel, and a clamping plate, a sealing plate and a positioning plate are sequentially positioned on the two screw rods from front to back;
a bayonet matched with the ball valve connecting arm is arranged on the clamping plate;
a sealing end cover is arranged on one side of the sealing plate, which faces to the clamping plate;
a piston cylinder is arranged between the positioning plate and the sealing plate, one end of the piston cylinder is fixed with the positioning plate in a sealing way, and the other end of the piston cylinder is fixed with the sealing plate in a sealing way; the inner wall of the port of the piston cylinder close to one end of the positioning plate is provided with upper-side internal threads, and the inner wall of the port of the piston cylinder close to one end of the sealing plate is provided with lower-side internal threads; the sealing plate is provided with a plurality of connecting holes for communicating the piston cylinder with the sealing end cover;
a piston is arranged in the piston cylinder, and the piston is slidably arranged in the piston cylinder and is in sealing fit with the inner wall of the piston cylinder; the upper end of the piston is circumferentially provided with an upper side external thread matched with the upper side internal thread, and the lower end of the piston is circumferentially provided with a lower side external thread matched with the lower side internal thread;
the lower side of the piston is provided with a tapping knife, and the upper end of the tapping knife is connected with the lower end of the piston through a connecting rod penetrating through the sealing plate; a wrench is arranged on the upper side of the piston, and the wrench is connected with the upper end of the piston through a torsion bar penetrating through the positioning plate;
the piston cylinder is provided with an exhaust hole penetrating through the inner wall and the outer wall, and the exhaust hole is provided with an exhaust valve; the piston cylinder is provided with a test hole penetrating through the inner wall and the outer wall, and the test hole is provided with an air pressure tester.
Preferably, the sealing end cover is annular, the upper end of the sealing end cover is fixed with the sealing plate in a sealing mode, the lower opening of the sealing end cover is open, the connecting holes are located on the inner side of the opening of the sealing end cover, at least one limiting groove is formed in the circumferential direction of the inner wall of the sealing end cover in a surrounding mode, and a sealing ring is arranged in each limiting groove.
Preferably, the seal ring is a Y-shaped seal ring.
Preferably, the tapping knife is an annular knife head, and the tapping knife is arranged coaxially with the piston.
Preferably, the air pressure tester is a pressure gauge.
Therefore, the invention has the following beneficial effects: 1. the bypass pipe can be connected without stopping the gas of the gas pipeline, so that the economic loss caused by gas stopping can be avoided; 2. the electric melting straight saddle-shaped pipe fitting can be used for detecting the sealing performance of a welding position after the electric melting straight saddle-shaped pipe fitting and a pipeline are dissolved; 3. the opening device can be repeatedly used, is convenient to operate, and improves the installation efficiency of pipeline engineering.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a schematic structural view of the blocking plate of the present invention.
Fig. 3 is a schematic view of the piston structure of the present invention.
Fig. 4 is a cross-sectional view of the end closure of the present invention.
Fig. 5 is a bottom view of the hermetic end cap of the present invention.
Fig. 6 is an enlarged schematic view at a in fig. 1.
Fig. 7 is an enlarged schematic view at B in fig. 1.
Fig. 8 is a schematic structural view of the electric smelting straight saddle, the electric smelting sleeve and the ball valve which are arranged on the pressurized gas pipeline.
Fig. 9 is a schematic structural diagram after installation and positioning of the invention.
Fig. 10 is a schematic structural view at the time of the sealing performance test of the present invention.
FIG. 11 is a schematic structural view of the state of the opening of the present invention.
Fig. 12 is a schematic view of the structure of the present invention after use.
1: a clamping plate; 101: a bayonet; 2: a sealing plate; 201: connecting holes; 3: positioning a plate; 4: a screw; 5: sealing the end cover; 501: a limiting groove; 502: a seal ring; 6: a piston cylinder; 601: upper internal threads; 602: lower side internal threads; 603: an exhaust hole; 604: an exhaust valve; 605: a test well; 606: an air pressure tester; 7: a piston; 701: an upper side external thread; 702: a lower side external thread; 8: a hole cutter; 9: a connecting rod; 10: a torsion bar; 11: a wrench; 12: a ball valve; 13: electrically fusing the sleeve; 14: electrically melting the straight saddle-shaped pipe fitting; 15: a gas pipeline with pressure.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
The utility model provides a not step down opening device for pipe fitting, refers to fig. 1 to 12, includes two screw rods 4, two screw rods 4 parallel arrangement, two screw rods 4 go up by having screens board 1, closing plate 2 and locating plate 3 to fix a position after going to in proper order, screens board 1, closing plate 2 and locating plate 3 all fix through the nut parallel of spiral shell dress on screw rod 4, and all can dismantle or adjust the distance between the adjacent plate through the adjusting nut. The clamping plate 1 is provided with a bayonet 101 matched with the connecting arm of the ball valve 12, as shown in fig. 2. The sealing plate 2 is provided with a sealing end cover 5 on one side facing the clamping plate 1, as shown in fig. 4 and 5, the sealing end cover 5 is used for sealing a port at one end of the ball valve 12, the sealing end cover 5 is annular, the upper end of the sealing end cover 5 is fixed with the sealing plate 2 in a sealing manner, and a lower opening is opened and is used for one end of the ball valve 12 to extend into. 5 inner wall circumference rings of end cover are equipped with a spacing groove 501, be equipped with a sealing washer 502 in the spacing groove 501, sealing washer 502 is Y type sealing washer, and after 5 lower extreme openings of end cover were stretched into to ball valve 12 one end, sealing washer 502 cup jointed at ball valve 12 port outer wall to it is sealed with ball valve 12 port outer wall, chooses for use Y type sealing washer can be after the inside pressurization of ball valve 12, realizes better self sealss, and the inside atmospheric pressure of ball valve 12 is big more, and the sealed effect of Y type sealing washer is better.
A piston cylinder 6 is arranged between the positioning plate 3 and the sealing plate 2, one end of the piston cylinder 6 is fixed with the positioning plate 3 in a sealing way, and the other end of the piston cylinder 6 is fixed with the sealing plate 2 in a sealing way; an upper internal thread 601 is arranged on the inner wall of a port at one end of the piston cylinder 6, close to the positioning plate 3, and a lower internal thread 602 is arranged on the inner wall of a port at one end of the piston cylinder 6, close to the sealing plate 2; the sealing plate 2 is provided with a plurality of connecting holes 201 for communicating the piston cylinder 6 with the sealing end cover 5, and the connecting holes 201 are all positioned on the inner side of the opening of the sealing end cover 5; a piston 7 is arranged in the piston cylinder 6, and as shown in fig. 3, the piston 7 is slidably arranged in the piston cylinder 6 and is in sealing fit with the inner wall of the piston cylinder 6; an upper external thread 701 matched with the upper internal thread 601 is circumferentially arranged at the upper end of the piston 7, and a lower external thread 702 matched with the lower internal thread 602 is circumferentially arranged at the lower end of the piston.
A tapping knife 8 is arranged on the lower side of the piston 7, the tapping knife 8 is an annular knife head, the tapping knife 8 and the piston 7 are coaxially arranged, and the upper end of the tapping knife 8 is connected with the lower end of the piston 7 through a connecting rod 9 penetrating through the sealing plate 2; a wrench 11 is arranged on the upper side of the piston 7, and the wrench 11 is connected with the upper end of the piston 7 through a torsion bar 10 penetrating through the positioning plate 3. The wrench 11 is used for pushing the piston 7 to slide in the piston cylinder 6 and also for rotating the piston 7 so that the piston 7 can be screwed with the upper external thread 701 and the lower external thread 702.
A vent hole 603 is formed in the piston cylinder 6 in a way of penetrating through the inner wall and the outer wall, and an exhaust valve 604 is arranged on the vent hole 603, as shown in fig. 6; a test hole 605 is formed in the piston cylinder 6 in a penetrating manner through the inner wall and the outer wall, and a pressure tester 606 is arranged on the test hole 605, as shown in fig. 7, the pressure tester 606 is a pressure gauge.
When the pressure gas pipeline is connected with the bypass pipe, the following pipe fittings are assembled and fixed, firstly, an electric melting straight-through saddle-shaped pipe fitting 14 is positioned on the pressure gas pipeline 15, the electric melting straight-through saddle-shaped pipe fitting 14 and the pressure gas pipeline 15 are welded and fixed through an electric heating wire on the electric melting straight-through saddle-shaped pipe fitting 14, then, one end of a ball valve 12 and a straight pipe of the electric melting straight-through saddle-shaped pipe fitting 14 are welded and fixed through an electric melting sleeve 13, and at the moment, the assembly and the fixation before the pipe fitting is opened are completed, as shown in fig. 8.
Then with the opening equipment installation location on the pipe fitting, can lift clamping plate 1 off from screw rod 4 earlier, trompil sword 8 stretches into and end cover 5 cup joints at ball valve 12 outer wall towards the unfixed end port of ball valve 12, and the terminal surface of ball valve 12 is contradicted with 2 bottom surfaces of closing plate in the end cover 5 until the terminal surface of ball valve 12, and at this moment, the Y type sealing washer in the end cover 5 realizes sealedly with the outer wall of ball valve 12, and inside atmospheric pressure is big more, and sealed effect is better. Then the clamping plate 1 is installed back, the bayonet 101 of the clamping plate 1 is clamped on the connecting arm of the ball valve 12 at one end which is not sleeved with the sealing end cover 5, the distance between the clamping plate 1 and the sealing plate 2 is adjusted through the screw cap on the adjusting screw rod 4 until the ball valve 12 is limited and fixed between the clamping plate 1 and the sealing plate 2. At this time, the opening device mounting positioning is completed as shown in fig. 9.
Before the hole is opened, the sealing performance test is carried out, before the test, the valve core of the ball valve 12 is opened, the upper external thread 701 of the piston 7 is completely screwed with the upper internal thread 601 of the piston cylinder 6, and the exhaust valve 604 is closed, at the moment, the inner cavity of the piston cylinder 6, the inner cavity of the ball valve 12 and the inner cavity of the electric smelting straight saddle-shaped pipe fitting 14 form a sealing cavity integrally. During testing, the torsion bar 10 is rotated through the wrench 11, and then the piston 7 is rotated, the piston 7 rotates and moves down along the upper side internal thread 601 of the piston cylinder 6, the inner cavity of the piston cylinder 6 on the lower side of the piston 7 is compressed, so that the air pressure in the inner cavity of the piston cylinder 6 on the lower side of the piston 7 is increased, because the sealing plate 2 is provided with a plurality of connecting holes 201 for communicating the piston cylinder 6 with the sealing end cover 5, the air pressure in the inner cavity of the ball valve 12 and the inner cavity of the electrofusion straight-through saddle-shaped pipe fitting 14 can also be synchronously increased along with the air pressure in the inner cavity of the piston cylinder 6, the air pressure value in the inner cavity of the piston cylinder 6 can be monitored through a pressure gauge connected to the testing hole 605, the air pressure in the inner cavity of the ball valve 12 can also be adjusted by adjusting the descending displacement of the piston 7, and the controllable maximum value state of the air pressure in the inner cavity of the ball valve 12 is that the upper side external thread 701 of the piston 7 is just separated from the upper side internal thread 601 of the piston cylinder 6, as shown in fig. 10. An operator only needs to compress the inner cavity of the piston cylinder 6 to form the air pressure of a required air pressure value, the pressure is maintained for a certain time, and whether leakage exists at the welding position among the ball valve 12, the electric melting sleeve 13, the electric melting straight-through saddle-shaped pipe fitting 14 and the pressurized gas pipeline 15 or not can be judged by comparing the data of the pressure gauge before and after the pressure maintaining. After the test is finished, if leakage exists, welding is needed again; if no leakage exists, the hole opening operation can be carried out.
When holes are formed, the exhaust valve 604 is opened, the compressed air pressure in the inner cavity of the piston cylinder 6, the inner cavity of the ball valve 12 and the inner cavity of the electric melting straight-through saddle-shaped pipe fitting 14 is relieved, and the piston 7 can smoothly slide downwards. After the upper side external thread 701 of the piston 7 is separated from the upper side internal thread 601 of the piston cylinder 6, the piston 7 can slide along the inner wall of the piston cylinder 6, and meanwhile, the tapping knife 8 can penetrate through the valve core through hole of the ball valve 12 and draw close to the outer wall of the pressurized gas pipeline 15 until the lower side external thread 702 of the piston 7 contacts with the lower side internal thread 602 of the piston cylinder 6. At this time, the exhaust valve 604 is closed to prevent the gas from leaking from the exhaust valve 604 after the opening. The piston 7 is rotated again, the lower external thread 702 of the piston 7 is screwed with the lower internal thread 602 of the piston cylinder 6, and the tapping knife 8 is rotated and moved downward until a through hole is cut in the pressurized gas pipe 15, as shown in fig. 11.
After the hole is opened, the tapping knife 8 needs to be retracted, at this time, the piston 7 only needs to be rotated reversely until the lower external thread 702 of the piston 7 is separated from the lower internal thread 602 of the piston cylinder 6, the piston 7 is pulled up to be in contact with the upper internal thread 601 of the piston cylinder 6, the piston 7 is rotated reversely again, the upper external thread 701 of the piston 7 is completely screwed with the upper internal thread 601 of the piston cylinder 6, and meanwhile, the tapping knife 8 is also returned to the initial position. At this time, the valve body of the ball valve 12 is closed, and as shown in fig. 12, the cavities in the two connecting arms of the ball valve 12 are disconnected from each other, and the exhaust valve 604 is opened to discharge the gas in the cavity of the piston cylinder 6 and the cavity of the connecting arm on the side of the sealing end cap 5 of the ball valve 12. Finally, the clamping plate 1 is unscrewed, and the whole opening device is detached from the pipe fitting, namely, one-time opening operation is completed. If the product is used again, the operation is repeated according to the process.
Claims (5)
1. A non-depressurising opening device for tubes, characterized in that: the device comprises two screw rods (4), wherein the two screw rods (4) are arranged in parallel, and a clamping plate (1), a sealing plate (2) and a positioning plate (3) are sequentially positioned on the two screw rods (4) from front to back;
a bayonet (101) matched with the connecting arm of the ball valve (12) is arranged on the clamping plate (1);
a sealing end cover (5) is arranged on one side of the sealing plate (2) facing the clamping plate (1);
a piston cylinder (6) is arranged between the positioning plate (3) and the sealing plate (2), one end of the piston cylinder (6) is fixed with the positioning plate (3) in a sealing way, and the other end of the piston cylinder (6) is fixed with the sealing plate (2) in a sealing way; an upper internal thread (601) is arranged on the inner wall of the port of the piston cylinder (6) close to one end of the positioning plate (3), and a lower internal thread (602) is arranged on the inner wall of the port of the piston cylinder (6) close to one end of the sealing plate (2); the sealing plate (2) is provided with a plurality of connecting holes (201) for communicating the piston cylinder (6) with the sealing end cover (5);
a piston (7) is arranged in the piston cylinder (6), and the piston (7) can be slidably arranged in the piston cylinder (6) and is in sealing fit with the inner wall of the piston cylinder (6); an upper external thread (701) matched with the upper internal thread (601) is arranged at the upper end of the piston (7) in the circumferential direction, and a lower external thread (702) matched with the lower internal thread (602) is arranged at the lower end of the piston in the circumferential direction;
a tapping knife (8) is arranged on the lower side of the piston (7), and the upper end of the tapping knife (8) is connected with the lower end of the piston (7) through a connecting rod (9) penetrating through the sealing plate (2); a wrench (11) is arranged on the upper side of the piston (7), and the wrench (11) is connected with the upper end of the piston (7) through a torsion bar (10) penetrating through the positioning plate (3);
an exhaust hole (603) is formed in the piston cylinder (6) in a penetrating mode and penetrates through the inner wall and the outer wall, and an exhaust valve (604) is arranged on the exhaust hole (603); the piston cylinder (6) is provided with a test hole (605) penetrating through the inner wall and the outer wall, and the test hole (605) is provided with an air pressure tester (606).
2. Non-depressurising opening device for tubes according to claim 1, characterised in that: end cover (5) are cyclic annular, and end cover (5) upper end is sealed fixed with closing plate (2), and the end opening is opened down, connecting hole (201) all are located end cover (5) opening inboard, and end cover (5) inner wall circumference encircles and is equipped with at least one spacing groove (501), all is equipped with one sealing washer (502) in every spacing groove (501).
3. Non-depressurising opening device for tubes according to claim 2, characterised in that: the sealing ring (502) is a Y-shaped sealing ring.
4. Non-depressurising opening device for tubes according to claim 1, characterised in that: the tapping knife (8) is an annular knife head, and the tapping knife (8) and the piston (7) are coaxially arranged.
5. Non-depressurising opening apparatus for tubes according to claim 1, characterised in that: the air pressure tester (606) is a pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078748.3A CN107588266B (en) | 2017-11-06 | 2017-11-06 | Non-pressure-reduction opening equipment for pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078748.3A CN107588266B (en) | 2017-11-06 | 2017-11-06 | Non-pressure-reduction opening equipment for pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107588266A CN107588266A (en) | 2018-01-16 |
| CN107588266B true CN107588266B (en) | 2022-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711078748.3A Active CN107588266B (en) | 2017-11-06 | 2017-11-06 | Non-pressure-reduction opening equipment for pipe fitting |
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| CN (1) | CN107588266B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113531290B (en) * | 2021-08-13 | 2022-02-08 | 无锡华润燃气有限公司 | Automatic gas pipeline maintenance robot and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022595A1 (en) * | 1990-12-10 | 1993-11-11 | Oy Kwh Tech Ab | Means and procedure for pipeline tapping |
| FR2692334A1 (en) * | 1992-06-10 | 1993-12-17 | Girpi Sa | Assembly and cutting tool for forming branch pipe in situ - comprising upper tube containing drive fitted perpendicular to main pipe walls, and lower part with cutting tool and containing saddle clamping to main pipe |
| CN2811727Y (en) * | 2005-07-29 | 2006-08-30 | 安源管道实业有限公司 | Apparatus for drilling and plugging steel-skeleton plastic composite pipe without stopping gas transportation |
| 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 |
| CN104029248A (en) * | 2014-06-11 | 2014-09-10 | 永高股份有限公司 | PE gas pipeline borer for operation under pressure |
| CN207514463U (en) * | 2017-11-06 | 2018-06-19 | 宁波市宇华电器有限公司 | It is a kind of not to be depressured open device for pipe fitting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016066981A1 (en) * | 2014-10-29 | 2016-05-06 | Heath Morgan Group Limited | Apparatus and method |
-
2017
- 2017-11-06 CN CN201711078748.3A patent/CN107588266B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993022595A1 (en) * | 1990-12-10 | 1993-11-11 | Oy Kwh Tech Ab | Means and procedure for pipeline tapping |
| FR2692334A1 (en) * | 1992-06-10 | 1993-12-17 | Girpi Sa | Assembly and cutting tool for forming branch pipe in situ - comprising upper tube containing drive fitted perpendicular to main pipe walls, and lower part with cutting tool and containing saddle clamping to main pipe |
| CN2811727Y (en) * | 2005-07-29 | 2006-08-30 | 安源管道实业有限公司 | Apparatus for drilling and plugging steel-skeleton plastic composite pipe without stopping gas transportation |
| 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 |
| CN104029248A (en) * | 2014-06-11 | 2014-09-10 | 永高股份有限公司 | PE gas pipeline borer for operation under pressure |
| CN207514463U (en) * | 2017-11-06 | 2018-06-19 | 宁波市宇华电器有限公司 | It is a kind of not to be depressured open device for pipe fitting |
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| CN107588266A (en) | 2018-01-16 |
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Address after: 315414 No. 71, West Road, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Applicant after: Ningbo Yuhua Industrial Co.,Ltd. Address before: 315414 No. 71, West Road, Hemudu Town, Yuyao City, Ningbo City, Zhejiang Province Applicant before: NINGBO YUHUA ELECTRIC APPLIANCE Co.,Ltd. |
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