CN2280821Y

CN2280821Y - Pipeline joint

Info

Publication number: CN2280821Y
Application number: CN 97207237
Authority: CN
Inventors: 朱建中
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-25
Filing date: 1997-02-25
Publication date: 1998-05-06
Anticipated expiration: 2007-02-25

Abstract

The utility model relates to a pipeline joint which is especially suitable for connecting polyethylene pipes. The pipeline joint is provided with a screw cap, a pipe joint body, a sealing ring and a clamping ring. The pipeline joint is characterized in that the sealing ring is composed of an elastic sealing piece which is formed by the integration of a washer and a pipe body with a sealing ring; the inner surface of the clamping ring is provided with circular saw teeth and tooth tips point to the big head of a taper ring; the pipe joint body can be composed of a two-way pipe, or a three-way pipe, or a four-way pipe, or a multiway pipe. The utility model has the advantages that the pipeline joint does not need to be processed with threads or be heated in operation time, and pipelines can be easily disassembly and added, and the utility model has the advantages of good tightness, strong tensile property and long service life.

Description

A kind of pipe joint

The utility model relates to a kind of pipe joint, is particularly useful for the connection of polyethylene pipe, and sets up and be in charge of and change the pipeline direction.

Polyethylene pipe is nontoxic and have pliability, is the suitable tubing of carrying tap water and drinkable liquid, and still, owing to be subjected to the puzzlement of polyethylene pipe connectivity problem, it is applied for many years and is restricted always.Traditional pipeline connecting method is: process screw thread in the end of connected tube in advance, then, connect with pipe joint.But, because polyethylene pipe is not suitable for hitch, so generally adopt a kind of two ends that tooth bank and the uniform pipe joint of diameter are arranged at present, during use, need to desire earlier the heating of connecting tube end, subsequently with in the pipe joint insertion tube, and take advantage of tube wall still hot soft when, bundling being taken over outer wall respective teeth Kan Chu with iron wire.This pipe joint has 3 major defects: need thermal source when 1. constructing; 2. year iron wire easy-to-rust of a specified duration causes joint to come off; 3. outward appearance is relatively poor.China utility model patent ZL 92224231.3 has invented a kind of quick movable pipe joint, and the seal ring that it steps up part, retaining ring, packing ring, spacer by fittings body, external pressure screw thread and is arranged on the spacer both sides is formed.Though this pipe joint has been abandoned the iron wire binding, but still have the following disadvantages: 1. sealing effect is poor, on the one hand because retaining ring is provided with sawtooth, thereby smoother, when fittings body and external pressure screw thread step up part and screw, also be difficult to make retaining ring and wait to take over and the external pressure screw thread, combine closely between the fittings body; Effect is poorer when waiting to take over periphery cylindricity difference; On the other hand, because spacer, seal ring, retaining ring etc. are in same surface, the circumferential seal effect is only arranged, and there is not the end face seal effect, in case when in the pipeline certain pressure intensity being arranged, just can ooze out with two ends to be taken over, ooze out along spacer, seal ring, retaining ring surface again, cause the pipe joint sealing effect poor.2. tensility is poor.Because the friction between this model utility only depends on fittings body and waits to take over is kept two to be taken over being connected, in case when waiting to take over smooth surface, fittings body and wait to take between friction very little, tensility is poor, thereby make pipe joint can two wait to take between string moving, pipe joint does not have the effect of firm connection.

The purpose of this utility model is to provide a kind of machining screw, additional lashing wire and thermal source of not only need not, dismounting and set up and be in charge of convenience, and good seal performance, and tensility is strong, the pipe joint of long service life.

The technical solution of the utility model is, has nut, tubular union, the pipe joint of seal ring and clamping ring, nut is threaded with the pipe connecting body, clamping ring is the taper ring with single radial cut, the taper hole taper fit of the big end of clamping ring and seal ring adjacency and male cone (strobilus masculinus) and nut, seal ring is for being made the elastomer seal of one by the body of pad and band seal ring, the internal surface of clamping ring has circular saw and the crown big first side towards taper ring, the pipe connecting body can be for two logical, threeway, four-way even how logical, each end of pipe connecting body all has reaming and forms step with pipe connecting body middle part, the outer surface of each end all has outside thread and is meshing with each other with the internal thread of nut, and seal ring is arranged in the reaming and the pad end of seal ring is positioned at the step place of pipe connecting body.

According to the size of pipe to be connected, the inner via hole at the reaming position of each end of pipe connecting body, its internal diameter can also can be reducing for isometrical.

The pipe connecting body can be for straight-through type two logical or become the two logical of α angle; Also can be T-shaped, Y font or other forms of threeway; Also can be cross or other forms of four-way; Can also be other forms of how logical, be in charge of or change the pipeline direction so that set up according to actual needs.

Technique effect of the present utility model is: neither need machining screw during (1) connecting pipeline, need not add binding and thermal source again.When using the utility model pipe joint, as long as caliber according to pipe to be connected, select the pipe joint of suitable size, successively nut, clamping ring and seal ring are enclosed within the end of pipe to be connected, put into then in the inner via hole at pipe reaming position, connecting body end, the outside thread of nut with the reaming position, end of pipe connecting body screwed, pipeline is coupled together.(2) dismounting and to set up pipeline convenient.When maintenance or change pipeline, pipe joint described in the utility model is equivalent to a movable joint, is removable pipeline as long as unscrew nut, can install equally easily behind the replacing pipeline; Simultaneously in case need set up when being in charge of, can make pipeline become required threeway, four-way even how logical as long as change a suitable pipe connecting body, also can will lead directly to the bend that becomes into the α angle, be connected with straight-through pipeline and compare, do not increase more formalities, very convenient.(3) good airproof performance.On the one hand, because seal ring described in the utility model is for being made the elastomer seal of one by the body of pad and band seal ring, the inner and outer surface concave-convex surface of seal ring own, with more smooth the comparing in existing seal ring surface, the circumferential seal effect is better than originally, simultaneously, the pad of seal ring can play the end seal effect, and the visible used seal ring of the utility model has the double seal effect.On the other hand, the internal surface of the used clamping ring of the utility model has circular saw and the crown big first side towards taper ring, with do not have sawtooth to compare on the existing retaining ring, when union body and nut screwing, can better make clamping ring and road to be taken over, the pipe connecting body, nut and seal ring are combined closely, when pipe connecting body reaming position periphery screw thread and nut screwing, under the sawtooth and breach effect of opening clip collar, road to be taken over can only be subjected to the power that applies inwards, make the pad of seal ring end be close to the step place of managing connecting body reaming position inner via hole, and screw thread continues to tighten, the pipe connecting body, seal ring, clamping ring, road to be taken over, combination must be good more each other for nut, thereby guaranteed the sealing of connecting pipeline effectively, even it is poor to wait to take over road outer surface cylindricity, also can utilize the saw tooth structure of clamping ring to overcome, can guarantee that equally connecting pipeline has good sealing effect.4. tensility is strong.Because every end of the utility model pipe connecting body is connected with treating adapter respectively, and the clamping ring internal surface has sawtooth, Comparatively speaking tensility is better, will not cause pipe joint string between waiting to take over moving, thereby make pipe joint play the effect of firm connection.5. corrosion-resistant and long service life.Pipe joint described in the utility model, except that seal ring was rubber parts, remaining part was by engineering plastics (as ABS plastic) injection molded; Therefore do not have corrosion-prone iron wire again, be embedded in underground or be immersed in for a long time in the environment that water is medium, can not get rusty by burn into, prolonged working life.5. particularly suitable to polyethylene pipe.Because the utility model when connecting pipeline, neither needs machining screw, need not add lashing wire and pad source again, sealing is good again, and tensility is strong again, and working life is long again, so particularly important to the connection of present insoluble polyethylene pipe.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is right angle two structural representation when logical for pipe connecting body of the present utility model.

Fig. 2 is the drawing in side sectional elevation of the seal ring of pipe joint shown in Figure 1.

Fig. 3 is the clamping ring schematic perspective view of pipe joint shown in Figure 1.

Structural representation when Fig. 4 is threeway for the pipe connecting body of pipe joint shown in Figure 1.

Structural representation when Fig. 5 is four-way for the pipe connecting body of pipe joint shown in Figure 1.

Fig. 6 is the structural representation that in-line two leads to for the pipe connecting body of pipe joint shown in Figure 1.

Fig. 7 is the structural representation of reaming position, pipe connecting body end inner via hole when not isometrical of pipe joint shown in Figure 1.

Pipe joint shown in Fig. 1～3, comprise nut (1), pipe connecting body (2), seal ring (3) and clamping ring (4), nut (1) is threaded with pipe connecting body (2), clamping ring (4) is for having the taper ring of single radial cut, the big end of clamping ring (4) and seal ring (3) adjacency and the male cone (strobilus masculinus) of clamping ring (4) and the taper hole taper fit of nut (1), seal ring (3) is for by pad (5) with make the elastomer seal of one with the body (7) of two seal rings (6), the internal surface of clamping ring (4) has circular saw (10) and the crown big first side towards taper ring, pipe connecting body (2) is that right angle two is logical, each end of pipe connecting body (2) has reaming (8) and forms step (11) with pipe connecting body (2) middle part, the outer surface of each end all has outside thread and is meshing with each other with the internal thread of nut (1), and the step (11) that seal ring (3) is arranged in the reaming (8) and pad (5) end of seal ring (3) is positioned at pipe connecting body (2) is located.

As Fig. 1, Fig. 4, Fig. 5, pipe connecting body of the present utility model (2) shown in Figure 6, according to the needs of waiting to take over the road, can be logical for right angle two, also can be for in-line two is logical, can also be into the two logical of α angle, the α angle is generally 45 °～135 °; Pipe connecting body (2) also can be T-shaped, Y font or other forms of threeway, and pipe connecting body (2) can also be cross or other forms of four-way, even can for other forms of how logical.

Pipe connecting body of the present utility model (2) as shown in Figure 7, according to actual conditions to be taken over, the internal diameter of the inner via hole at its end reaming (8) position can also can dispose for reducing for isometrical.

The seal ring of pipe joint as shown in Figure 2 (3), can be to make one by a pad (5) with the body (7) of two seal rings (6), also can make one with two bodys (7) by a pad (5) with upper sealing ring (6), seal ring (6) is many more, sealing effect is good relatively more, but its sealing effect meets the demands fully when being with two seal rings (6) usually.

When being used for connecting pipeline, the utility model effect when connecting polyethylene pipe is more obvious.Below with the example that is connected to of polyethylene pipe, can be earlier according to the pipeline number of polyethylene pipe to be connected, caliber etc., select the pipe joint that is complementary with it for use, then as shown in Figure 1, successively with nut (1), clamping ring (4), and seal ring (3) is enclosed within on the polyethylene pipe to be connected (12), the crown of the circular saw (10) of the internal surface of clamping ring (4) is towards the big first side of taper ring, the taper hole tapering of the big end of clamping ring (4) and seal ring (3) adjacency and male cone (strobilus masculinus) and nut (1) is complementary, the pad (5) of seal ring (3) end is adjacent to polyethylene pipe (2) end to be connected, then polyethylene pipe (12) is packed into and manage in the inner via hole at connecting body (2) end reaming (8) position, and the pad (5) of seal ring (3) end is close to mutually with the step (11) of pipe connecting body (2), adjust clamping ring (4), its big first side and seal ring (3) are pressed close to, again the screw thread of nut (1) with the outer surface at the reaming position of pipe connecting body (2) end screwed and tighten, number according to pipeline, carry out repeated operation, two or many polyethylene pipes can be coupled together securely.According to different needs, it is logical that people just can connect into pipeline in-line two easily like this, and right angle two is logical, becomes α angle two logical, Y font, cross or other form threeways, and cross or other form four-ways, and other forms of how logical.As long as select not isometrical pipe connecting body (2) as shown in Figure 7 for use, can be easily the polyethylene pipe of different tube diameters be coupled together.

Because when tightening nuts (1), clamping ring (4) is under the effect of the conical surface and opening (9), all sawtooth (10) are stuck in polyethylene pipe (12) surface in it, under sawtooth (10) effect, get over tightening nuts (1), correspondingly just to polyethylene pipe (12) application of force inwards, at this moment the end of polyethylene pipe (12) just makes the pad (5) of seal ring (3) end and the step (11) of managing connecting body (2) reaming position paste tightly more, make the seal (6) of seal ring (3) be close to the inner via hole wall of managing connecting body (2) reaming position on the one hand, the outer wall of on interior Zhou Fangxiang, being close to polyethylene pipe to be connected (12) on the other hand, seal ring (3) plays pad (5) and seal ring (6) simultaneously like this, and the pad (5) of step (11) and seal ring (3) end closely cooperates and more increased sealing effect.Because opening clip collar this moment (4) also hugs under the effect of screwing on polyethylene pipe (12) outer wall, therefore better tightness not only, and also tensile strength has also strengthened.

The utility model pipe joint, because good airproof performance, it is very convenient that tension and dismounting and setting up is in charge of, and also can play the movable joint effect, it has broad prospect of application at aspects such as the conveying of tap water or other drinkable liquids, rural water improvements, can also promote applying of polyethylene pipe.

Claims

1, a kind of pipe joint, has nut (1), pipe connecting body (2), seal ring (3) and clamping ring (4), nut (1) is threaded with pipe connecting body (2), clamping ring (4) is for having the taper ring of single radial cut, the taper hole taper fit of the big end of clamping ring (4) and seal ring (3) adjacency and male cone (strobilus masculinus) and nut (1), it is characterized in that: seal ring (3) is for being made the elastomer seal of one by the body (7) of pad (5) and band seal ring (6), the internal surface of clamping ring (4) has circular saw (10) and the crown big first side towards taper ring, pipe connecting body (2) can be for two logical, threeway, four-way even how logical, each end of pipe connecting body (2) all has reaming (8) and forms step (11) with pipe connecting body (2) middle part, the outer surface of each end all has outside thread and is meshing with each other with the internal thread of nut (1), and the step (11) that seal ring (3) is arranged in the reaming (8) and pad (5) end of seal ring (3) is positioned at pipe connecting body (2) is located.

2, pipe joint according to claim 1 is characterized in that: the inner via hole at reaming (8) position of each end of pipe connecting body (2), its internal diameter can also can be reducing for isometrical.