CN2818992Y

CN2818992Y - Gas pipeline lead-in connector

Info

Publication number: CN2818992Y
Application number: CN 200520089710
Authority: CN
Inventors: 刘焕兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-15
Filing date: 2005-03-15
Publication date: 2006-09-20
Anticipated expiration: 2015-03-15

Abstract

The utility model relates to a gas pipeline lead-in connector, which comprises a three-way pipe body A, a three-way pipe body B and a three-way pipe body C. The utility model is characterized in that the upper port of the three-way pipe body B and the inner wall of the side port of the three-way pipe body C are connected by screw threads, and are locked tightly by a set of locking nuts which are arranged on the three-way pipe body B; the side port of the three-way pipe body B and the outer wall of the upper port of the three-way pipe body A are connected by the screw threads, and are locked tightly by a set of locking nuts which are arranged on the three-way pipe body A; the lower port of the three-way pipe body A is screwed with a screw-plug, and the lower port of the three-way pipe body B is screwed with another screw-plug. The utility model has the advantages that the corrosion resistance can be enhanced, interfaces can be reduced, and thus, the air leakage points can be reduced; the installation and the maintenance are convenient, pipe fittings are designed into interchangeable fittings, the special pipe fittings of the gas pipeline lead-in connector are introduced, the enhancement of the engineering cost is not conspicuous, but the engineering quality can be increased conspicuously. If large natural disasters or man-made damages by external forces do not occur, air leak accidents are not easy to occur. The harm and the influence brought by the accidents can be reduced.

Description

Gas pipeline house lead in connection set

(1) technical field

The utility model relates to a kind of pipeline connecting device, particularly relates to a kind of gas pipeline house lead in connection set.

(2) background technique

Coal gas is a kind of clear energy sources, and easy to use, and the vast cities and towns of China have been extensive use of piped gas, do civilian and industrial raw material, in gas pipeline engineering, constantly adopt new material, new product, new technology, new process at present, improved Safety performance widely, installation has also made things convenient for a lot.But also have different defectives, particularly garden pipeline and house lead in inlet tube joint in the part, adopt sometimes and nip off big caliber cast iron tube material, tubule spare adopts steel short tube external sealing plug Placement.This kind mode adds man-hour at the steel short tube, and there are the following problems at two ends screw thread place: 1, zinc-plated anticorrosive coat is destroyed; 2, cause the thick tube wall attenuate of about 3mm; 3, must there be screw thread to leak outside after the installation; 4, pipe fitting connects rough and uneven in surfacely herein, can not get effective preservative treatment, very easily is subjected to the burn into corrosion after burying ground; So that in a single day pipeline is subjected to the external force effect, just easily rupture at the screw thread place.

(3) summary of the invention

At above defective, the utility model provides a kind of good sealing effect, is difficult for leakage gas, and the screw thread place is difficult for taking place the gas pipeline house lead in connection set of fracture.

The technological scheme that adopts is:

Gas pipeline house lead in connection set comprises threeway body A, threeway body B, threeway body C.The upper end-hole of threeway body A and threeway body B is respectively equipped with outside thread, and its lower end mouth is respectively equipped with internal thread, and its side ports is respectively equipped with internal thread and outside thread.The inner wall edge of threeway body A and threeway body B side ports has outward-dipping flare groove, and flare groove has been embedded in seal ring.Be respectively equipped with internal thread and outside thread on the inner and outer wall of threeway body C side ports, its front inner wall edge has outward-dipping flare groove, groove has been embedded in seal ring, the upper end-hole of threeway body A is connected with the inner thread of threeway body C side ports, and locked by a locking nut that is nested with on threeway body A, its side ports is connected with the outer wall thread of threeway body B upper end-hole, and locked by a locking nut that is nested with on threeway body B, the front portion of locking nut inwall is provided with internal thread, its rear portion is provided with the packing ring chamber, the indoor bracing ring that is equipped with of packing ring.The outer wall thread that is nested with the cylindric pipe clamp on the locking nut on the threeway body A and fixing pipe clamp is connected, the locking nut that is nested with on threeway body B upper end-hole outer wall is connected with the outer wall thread of threeway body A side ports, and the lower end mouth of threeway body A and threeway body B is screwed into a plug respectively.

The upper end-hole of above-mentioned threeway body A also can be connected with threeway body C by a connecting tube, the two ends of connecting tube are respectively equipped with outside thread, one end of connecting tube is connected with the inner thread of threeway body C side ports, and locked by a locking nut that is nested with on connecting tube, the other end of connecting tube is connected with the inner thread of threeway body A upper end-hole, and is locked by a locking nut that is nested with on connecting tube.

Major advantage of the present utility model:

1, cancelled steel pipe fittings, the pipe fitting material all adopts spheroidal graphite cast iron or malleable cast iron, thereby has improved corrosion resistance greatly.

2, reduce interface, thereby reduced the gas leakage point.

3, adopting the connection of internal sealing plug rigidity to be connected dual mode with the spigot and socket type sealed soft combines.Thereby: 1) reached the double-sealing effect.In case sealing has for the second time been played in internal sealing plug gas leakage, the rubber seal of socket joint inclined-plane.2) when stress produces, make all bearing loads of a plurality of pipe fittings as far as possible, avoided single pipe fitting or part to be subjected to whole deformation under loads or destroyed.3) when rigidity connects inefficacy, flexibly connect and continue to play interconnect function; And can compensate displacement and the deflection that produces because of external force.4) prevent that pipe fitting breaks away from mutually when pipe sedimentation is excessive.

4, installation and maintenance are convenient.Do not need the cast iron tubing of the big caliber formula of nipping off is installed.Only need on the bassoon diameter pipes, bore a regulation aperture, adopt the flexible rubber backing plate to be tightly connected.

5, pipe fitting is designed to general part.As long as inside nominal diameter is identical, all can general, exchange.

6, introduce gas pipeline house lead in connection set special pipe fitting,, can significantly improve construction quality though the engineering cost raising is not remarkable.As major natural disasters do not take place, or artificial outside destroy, be difficult for taking place the gas leakage accident.The harm and the influence that bring because of accident have been reduced.

(4) description of drawings

Fig. 1 is a kind of embodiment's of the utility model a structural representation.

Fig. 2 is the structural representation of the utility model locking nut.

Fig. 3 is the structural representation of the utility model threeway body A (B).

(5) embodiment

As attached illustrated in figures 1 and 2, gas pipeline house lead in connection set of the present utility model comprises threeway body A, threeway body B, threeway body C and locking nut 3,4.Threeway body A has identical structure with threeway body B, all have upper end-hole 6, lower end mouth 7 and side ports 8, the upper end-hole 6 of threeway body A and B is respectively equipped with outside thread 9, and its lower end mouth 7 is respectively equipped with internal thread 10, and its side ports 8 is respectively equipped with internal thread 11 and outside thread 12.The inner wall edge of the side ports 8 of threeway body A and threeway body B has outward-dipping flare groove 13, and flare groove 13 has been embedded in seal ring 14.Be respectively equipped with internal thread 16 and outside thread 17 on the inner and outer wall of threeway body C side ports 15, its front inner wall edge has outward-dipping flare groove 18, flare groove 18 has been embedded in seal ring 19, the upper end-hole 6 of threeway body B is connected with the inner thread of threeway body C side ports 15, and its side ports 8 is connected with the outer wall thread of threeway body B upper end-hole 6.Locking nut 3,4 is nested with respectively on the outer wall of the upper end-hole 6 of threeway body A and threeway body B, and the front portion of locking nut 3,4 inwalls is provided with internal thread 20, and its rear portion is provided with packing ring chamber 21, and bracing ring 5 is housed in the packing ring chamber 21.The locking nut 3 that is nested with on threeway body A is connected with the outer wall thread of threeway body C side ports 15, the locking nut 4 that is nested with on threeway body B upper end-hole 6 outer walls is connected with the outer wall thread of threeway body A side ports 8, the lower end mouth 7 of threeway body A is screwed into a plug 1, and the lower end mouth of threeway body B is screwed into a plug 2.

Claims

1, gas pipeline house lead in connection set, comprise threeway body (A), threeway body (B) and threeway body (C), the upper end-hole (6) of threeway body (A) and threeway body (B) is respectively equipped with outside thread (9), its lower end mouth (7) is respectively equipped with internal thread (10), its side ports (8) is respectively equipped with internal thread (11) and outside thread (12), the inner wall edge of the side ports (8) of threeway body (A) and threeway body (B) has outward-dipping flare groove (13), flare groove (13) has been embedded in seal ring (14), be respectively equipped with internal thread (16) and outside thread (17) on the inner and outer wall of threeway body (C) side ports (15), its front inner wall edge has outward-dipping flare groove (18), flare groove (18) has been embedded in seal ring (19), it is characterized in that: the upper end-hole (6) of threeway body (B) is connected with the inner thread of threeway body (C) side ports (15), and locked by a locking nut (4) that is nested with on threeway body (B), the side ports (8) of threeway body (B) is connected with the outer wall thread of threeway body (A) upper end-hole (6), and locked by a locking nut (3) that is nested with on threeway body (A), the lower end mouth (7) of threeway body (A) is screwed into a plug (1), and the lower end mouth of threeway body (B) is screwed into a plug (2).

2, gas pipeline house lead in connection set according to claim 1 is characterized in that the front portion of locking nut (3), (4) inwall is provided with internal thread (20), and its rear portion is provided with packing ring chamber (21), and bracing ring (5) is housed in packing ring chamber (21).