CN2190213Y

CN2190213Y - Combined pipe bend

Info

Publication number: CN2190213Y
Application number: CN 94210804
Authority: CN
Inventors: 郭书均
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-30
Filing date: 1994-04-30
Publication date: 1995-02-22
Anticipated expiration: 2004-04-30

Abstract

The utility model discloses a combined pipe bend, which uses a conical tooth sleeve as the basic part, when the diameter of the pipe is larger, a flange with a conical inner hole is fitted with the conical tooth sleeve; when the diameter of the pipe is smaller, a screw-thread taper sleeve and a step taper sleeve are fitted with the conical tooth sleeve, and a hooking-head nut hooks the steps of the step taper sleeve to be screwed with the screw-thread taper sleeve. The two methods both use the pulling force of the screw thread, the taper holes force the conical tooth sleeve to bite the wall of pipes and drive the two pipes to be connected tightly. The utility model has the advantages of quick and tight connection, etc., and does not need to preprocess the pipes.

Description

Combined pipe bend

The utility model has related to a kind of pipe joint, particularly a kind of combined pipe joint.

In the existing pipe interconnection technique of using, when the connected tube diameter is big, it is the most extensive to connect use with flange, but this kind connecting means need be welded on flange on the pipe, also the bolt connecting hole of two flanges must be aligned in welding process, these are not only installed for the scene of pipe and make troubles, and have reduced installation rate, and need carry multiple instrument, the welding of flange simultaneously also has certain technical difficulty.

When burying pipe underground, also have that a kind of method---sand replacement method is often used, it is a big end of the small end of a pipe being put into another root pipe, then around gap location fill out sand and seal.This connecting means is not suitable for the bigger situation of pipe internal pressure, and sealing effect is also undesirable, and sand enters in the pipe easily, and environment has when necessarily requiring in pipe, and the interior environment of pipe is exceeded standard, and pollutes.

The connected tube diameter hour, use the most general to be threaded, it is that the tube head of connected tube is processed screw thread in advance, be wrapped with raw meal belt or other sealer at tube head then, connect two pipes with socket or movable joint, though this connecting means can reach requirement on pressure-bearing, sealing effect, it needs the preprocessing screw thread, has brought trouble to installation.When the pipeline of laying is longer and since whole pipe can not be on lathe machining screw, be divided into multistage after must blocking and process, and then connect into whole with socket or movable joint, this just makes pipe joint increase, and has increased installation cost.

In addition, it is also more commonly used to also have a kind of snap button to connect, and it also belongs to be threaded a kind of, and than above-mentioned being threaded, this connecting means can be processed a pipe thread less, but has increased the shortcoming that can not bear pressure.

The purpose of this utility model is exactly the deficiency that has now in the pipe interconnection technique in order to solve, and the combined pipe joint has very wide application area, can use on big-inch pipe, can use on the minor diameter pipe again; Promptly do not need flange is welded on the pipe, need be on pipe yet the preprocessing screw thread.And have and connect closely, ne-leakage, can bear characteristics such as pressure, installation and removal are simple, easy to maintenance.

The utility model is achieved in that when the connected tube diameter is big, cooperate with flange taper facing with internal taper hole, fastening between the flange with screw bolt and nut, under the tension of screw thread, flange is drawn close mutually, make the tooth of taper facing buckle the connected tube tube wall of nipping simultaneously, the taper facing drives two tubes to moving together in the impetus of flange internal taper hole, fit tightly at last, the sealing gasket of packing in the junction of two tubes, the pipe junction is sealed fully, prevent seepage.

At the connected tube diameter hour, match with the taper facing with screw thread tapered sleeve and step tapered sleeve, hook the step of step tapered sleeve by the gib head nut, the other end and screw thread tapered sleeve screw, under the tension of screw thread, screw thread tapered sleeve and step tapered sleeve are drawn close mutually, make the interior connected tube tube wall of nipping of buckleing of taper facing simultaneously, the taper facing drives two tubes to moving together under the impetus of the internal taper hole of the internal taper hole of screw thread tapered sleeve and step tapered sleeve, fit tightly the sealing gasket of equally also need packing at last in the pipe junction.

Below in conjunction with accompanying drawing the utility model is described in further details.

Fig. 1 is the schematic perspective view of taper facing.

Fig. 2 is that the combined pipe joint that connects narrow tube partly cuts open connection diagram.

Fig. 3 is that the combined pipe joint that connects large diameter tube partly cuts open connection diagram.

With reference to Fig. 1.Taper facing profile is a truncated cone, and endoporus is cylindrical, and inner hole wall is processed with the tooth button of snap fastener tube wall, and tooth button cross section acute angle points to two pipe docking sites.The taper facing has a plurality of opening slots on circumference, wherein have only an opening slot to reach big end from small end, and taper facing total length is open-minded, and remaining is then not open-minded.

With reference to Fig. 2.Screw thread tapered sleeve (2) and step tapered sleeve (4) match with taper facing (1) respectively, the step that gib head nut (3) one end hooks are lived step tapered sleeve (4), and the other end and screw thread tapered sleeve (2) screw.Its working procedure is such: under the effect of screw thread pulling force, screw thread tapered sleeve (2) and step tapered sleeve (4) are drawn close gradually, and the screw thread pulling force is delivered on the male cone (strobilus masculinus) of taper facing (1) by the internal taper hole of screw thread tapered sleeve (2) and the internal taper hole of step tapered sleeve (4), the screw thread pulling force reality that acts on the male cone (strobilus masculinus) of taper facing (1) can be decomposed into two power---radial force and axial force, because taper facing (1) has opening slot, so have the character of spring housing---can tighten up under external force, just because of this, taper facing (1) constantly tightens up under the radial force effect, the tooth button connected tube tube wall of also nipping gradually, simultaneously, again under the effect of axial force, drive connected tube and constantly move forward, fit tightly until two pipes.

With reference to Fig. 3.Two taper facings (1) cooperate with two flanges (5) with internal taper hole respectively, and are fastening with bolt (6) and nut (7) between two flanges (5).Its working principle is identical with Fig. 2; Turn nut (7), two flanges (5) are drawn close under the screw thread tension gradually, and the screw thread pulling force is delivered on the male cone (strobilus masculinus) of taper facing (1) by internal taper hole, the screw thread pulling force resolves into two power---radial force and axial force at this, taper facing (1) constantly tightens up under the radial force effect, the tooth button connected tube tube wall of also nipping gradually, simultaneously, under the effect of axial force, drive connected tube again and constantly move forward, fit tightly until two mouths of pipe.

Claims

1, a kind of combined pipe joint is characterized in that:

A, combined pipe joint divide two major types, all use taper facing (1) as basic part,

B, taper facing (1) profile are truncated cone, endoporus is cylindrical, inner hole wall is processed with the tooth button of snap fastener tube wall, tooth button cross section acute angle points to two pipe docking sites, taper facing (1) is processed with a plurality of opening slots on circumference, wherein only an opening slot is opened to big end from small end, total length is open-minded, and remaining is then not open-minded.

2, according to the described combined pipe joint of claim 1, it is characterized in that: hour at the connected tube diameter, match with two taper facings (1) respectively by screw thread tapered sleeve (2) with internal taper hole and step tapered sleeve (4), the step that gib head nut (3) one end hooks are lived step tapered sleeve (4), one end and screw thread tapered sleeve (2) screw, connecting thread tapered sleeve (2) and step tapered sleeve (4).

3, according to the described combined pipe joint of claim 1, it is characterized in that: when the connected tube diameter is big, use two flanges (5) to match, be connected two flanges (5) with nut (7) by bolt (6) with two taper facings (1) with internal taper hole.