阅读说明：本技术 一种聚乙烯类柔性管用钳压管件 (Clamp pressing pipe fitting for polyethylene flexible pipe ) 是由 黄晓峰 胡迪高 叶高峰 于 2021-01-06 设计创作，主要内容包括：本发明涉及管道连接领域,具体涉及一种聚乙烯类柔性管用钳压管件。一种聚乙烯类柔性管用钳压管件,包括一管件体,管件体上至少有一管件嘴头,以及固定在管件嘴头底端的管套,管件嘴头上设有挡水筋,以及在密封槽内的密封圈,所述的挡水筋上横向设有导流槽,导流槽从管件嘴头头部贯穿到底部。本发明对管件未压不漏导致遗漏钳压的问题提供一种新的解决方案,进一步提高管件安装的安全性及可靠性。本发明的管件结构从实际出发,实用性高,具有市场推广价值。(The invention relates to the field of pipeline connection, in particular to a clamping and pressing pipe fitting for a polyethylene flexible pipe. The utility model provides a polyethylene class is clamp pressure pipe fitting for flexible pipe, includes a pipe fitting body, has a pipe fitting mouth at least on the pipe fitting body to and fix the pipe box in pipe fitting mouth bottom, be equipped with the manger plate muscle on the pipe fitting mouth, and the sealing washer in the seal groove, manger plate muscle on transversely be equipped with the guiding gutter, the guiding gutter runs through the bottom from pipe fitting mouth head. The invention provides a new solution to the problem of missed clamping caused by no leakage of the pipe fitting, and further improves the safety and reliability of pipe fitting installation. The pipe fitting structure provided by the invention is in practice, high in practicability and has market popularization value.)

1. The utility model provides a polyethylene class is clamp pressure pipe fitting for flexible pipe, includes a pipe fitting body (1), has at least a pipe fitting mouth (10) on the pipe fitting body (1) to and fix pipe box (2) in pipe fitting mouth (10) bottom, be equipped with manger plate muscle (11) on pipe fitting mouth (10), and sealing washer (13) in seal groove (12), its characterized in that: the water retaining rib (11) is transversely provided with a guide groove (15), and the guide groove (15) penetrates from the head of the pipe fitting nozzle (10) to the bottom.

2. The pipe clamp for the polyethylene flexible pipe according to claim 1, wherein: the guide groove (15) is a shallow groove, the depth of the guide groove is less than 1.5 mm, and the guide groove does not touch the bottom of the sealing groove (12); 1 or more than one pipe fitting nozzles (10) are distributed.

3. The pipe clamp for the polyethylene flexible pipe according to claim 1, wherein: the bottom of the diversion trench (15) is arc-shaped.

4. The pipe clamp for the polyethylene flexible pipe according to claim 1, wherein: the rear part of a sealing ring (13) of the pipe fitting nozzle head (10) is provided with more than two anti-rotation convex teeth (16).

5. The pipe clamp for the polyethylene flexible pipe as claimed in claim 4, wherein: the anti-rotation convex teeth (16) are distributed in a whole circle.

6. The pipe clamp for the polyethylene flexible pipe as claimed in claim 4, wherein: the top of the anti-rotation convex tooth (16) is not higher than the outer diameter of the water retaining rib (11).

7. The pipe clamp for the polyethylene flexible pipe according to any one of claims 1 to 6, wherein: the pipe fitting body (1) is made of plastic materials.

8. The pipe clamp for the polyethylene flexible pipe according to any one of claims 1 to 6, wherein: the rear section of the anti-rotation convex tooth (16) is also provided with an annular groove (17), and a backflow baffle spacer ring (18) is arranged in the annular groove (17).

Technical Field

The invention relates to the field of pipeline connection, in particular to a clamping and pressing pipe fitting for a polyethylene flexible pipe.

Background

The flexible pipe is a main pipe for household water supply and heating, and comprises an aluminum plastic pipe and a polyethylene pipe, wherein the inner wall and the outer wall of the two pipes are both made of polyethylene materials, the flexibility is good, manual pipe distribution can be completely realized, and the temperature resistance and pressure resistance are good.

There are various connection modes of the polyethylene flexible pipe, including a clamp connection, as shown in publication No. CN 106969218A, "an improved clamp connection". The pipe sleeves of the connecting pipe fittings are clamped through the clamping tool and are compressed inwards, and the connecting and sealing are realized through the deformation of the linkage pipe. The clamping connection mode is safe and efficient, and the clamp is widely applied at home and abroad.

Generally when the construction is pressed to flexible pipe pincers, in order to prevent that the pipe connection from making mistakes, all accomplish the back with whole pipeline layout, carry out unified pincers and press, carry out pipeline water injection pressure testing at last again, after the pressurize inspection finishes, accomplish the construction. However, in the case of the background art of the above-mentioned publication, the seal ring and the water blocking rib of the pipe fitting are compressed after the pipe fitting is inserted, and the pipe cannot be leaked due to the fact that the pipe fitting is not clamped. The visual surface difference between the pipe clamping pressure and the pipe non-clamping pressure is not large, the installation pressure test is passed, but the pipe non-clamping pressure has great hidden trouble in the later operation. The above bulletin number provides a scheme for judging whether the clamping pressure is available or not through the clamping seat, but the scheme is authorized and becomes the prior art scheme.

In addition, during the construction of the polyethylene flexible pipe, a problem of rotation of the nozzle of the pipe fitting is also found. If the whole pipe fitting nozzle is cylindrical, under the condition of long-term expansion with heat and contraction with cold, the pipe fitting is connected with the pipe fitting and can be loosened, so that the pipe fitting can rotate at the joint, the force of the circular arc of the clamp pressure is not uniform, the rotation of the pipe fitting can cause the sealing failure of the pipe fitting, the leakage is caused, and the leakage happens occasionally on the site.

And also the case where the pipe member is under negative pressure and external sewage is permeated into the intake air.

Disclosure of Invention

The invention provides a polyethylene flexible pipe clamping pipe fitting with a novel structure, which solves the problem that the pipe fitting is not pressed and does not leak, and simultaneously increases the problems of nozzle rotation after the nozzle of the clamping pipe fitting is contracted and negative pressure water seepage and air intake. The invention starts from the problems found in the long-term installation of the pipelines of the company, solves the related problems by changing the structure of the nozzle of the pipe fitting, and ensures the sealing performance in the installation and later period of the pipe fitting. The pipe fitting structure is practical, further promotes the connection security, has market spreading value.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a polyethylene class is clamp pressure pipe fitting for flexible pipe, includes a pipe fitting body, has a pipe fitting mouth at least on the pipe fitting body to and fix the pipe box in pipe fitting mouth bottom, be equipped with the manger plate muscle on the pipe fitting mouth, and the sealing washer in the seal groove, manger plate muscle on transversely be equipped with the guiding gutter, the guiding gutter runs through the bottom from pipe fitting mouth head.

The technical scheme of the invention can also comprise:

the flow guide groove is a shallow groove, the depth of the flow guide groove is less than 1.5 mm, and the flow guide groove does not touch the bottom of the sealing groove; 1 or more than one pipe fitting nozzles are distributed on the pipe fitting nozzles.

The bottom of the diversion trench is arc-shaped.

The rear part of the sealing ring of the pipe fitting nozzle is provided with more than two anti-rotation convex teeth.

The anti-rotation convex teeth are distributed in a whole circle.

The top of the anti-rotation convex tooth is not higher than the outer diameter of the water retaining rib.

The pipe fitting body is made of plastic materials.

The rear section of the anti-rotation convex tooth is also provided with an annular groove, and a backflow baffle spacer ring is arranged in the annular groove.

The invention provides a novel solution for solving the problem of missed clamping caused by no leakage of the pipe fitting after clamping and the problems of leakage caused by loosening and rotation of the pipe fitting after clamping and negative pressure water seepage and air intake in the long-term pipeline construction process of aluminum plastic pipes and polyethylene pipes. Further improve the security of installation and the sealed reliability in later stage. The pipe fitting structure provided by the invention is in practice, high in practicability and has market popularization value.

Drawings

Fig. 1 is an exploded perspective view of a first embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a first embodiment of the present invention;

fig. 3 is a schematic perspective view of a second embodiment of the present invention;

fig. 4 is a schematic perspective view of a third embodiment of the present invention.

Detailed Description

The invention will be further described with reference to the drawings showing preferred embodiments.

As shown in fig. 1 and fig. 2, in a first preferred embodiment, a pipe clamp for a polyethylene flexible pipe includes a pipe body 1, at least one pipe nozzle 10 is disposed on the pipe body 1, and a pipe sleeve 2 is fixed at a bottom end of the pipe nozzle 10, a water retaining rib 11 is disposed on the pipe nozzle 10, and a sealing ring 13 is disposed in a sealing groove 12, a diversion trench 15 is transversely disposed on the water retaining rib 11, and the diversion trench 15 penetrates from a head portion to a bottom portion of the pipe nozzle 10.

The polyethylene flexible pipe is mainly an aluminum plastic pipe, a polyethylene pipe and other two flexible pipes, the polyethylene pipe also comprises a high temperature resistant polyethylene pipe, a cross-linked polyethylene pipe and the like, and further subdivided pipes, and the polyethylene flexible pipe is characterized in that the inner layer and the outer layer of the pipe are made of polyethylene materials. Different from other materials, the polyethylene flexible pipe has strong plastic retraction memory, moderate material hardness and material sealing property, and the properties are completely different from those of a copper pipe and a stainless steel pipe in hardness, rigidity, sealing property and the like. The sealing effect of the water retaining rib is not large when metal pipes such as copper pipes and the like are not pressed, water is basically leaked during pressure testing, and due to the characteristics of polyethylene flexible pipe materials, the water retaining rib 11 is good in sealing performance after being attached to the polyethylene flexible pipe 3, the water pressure flowing through can be effectively reduced by blocking, a certain sealing effect can be achieved due to the fact that the sealing ring 13 blocks, and the sealing effect is not leaked during pressure testing.

But the long-term tightness of the pipeline connection without clamping pressure is still insufficient, and in addition, the pipeline connection has no connection strength, is easy to loosen and has huge leakage hidden trouble. The polyethylene flexible pipe 3 can be further contracted into a gap of the pipe fitting nozzle 10 by clamping the pipe fitting for clamping the polyethylene flexible pipe, so that the sealing property and the tensile pulling strength are improved, and the connection requirement is met.

The water retaining rib 11 not only improves the sealing performance, but also improves the drawing strength after the clamping, and has a guiding effect on the pipe at the connecting part. The nozzle 10 is provided with a plurality of water retaining ribs 11, such as six ribs in the embodiment.

The diversion trench 15 is a structure which can effectively improve water leakage before clamp pressure, and is particularly suitable for occasions of polyethylene flexible pipes. The diversion trench 15 is a shallow trench, the depth of which is less than 1.5 mm, and the bottom of the sealing trench 12 is not touched; 1 or more, in the embodiment, one, are distributed on the pipe fitting nozzle head 10. The depth distance is related to the size of the clamp compression opening and the wall thickness of the inner wall of the polyethylene flexible pipe 3, but has little influence on the sealing performance and the tensile strength after clamping. Before the pipe fittings are clamped, the sealing ring 13 is not enough to block the pressure to be tested, and the pressure-tested water flow reaches the effect of water leakage through the diversion trench 15; after the pipe fittings are clamped, the diversion trench 15 of the shallow groove can be filled with the polyethylene flexible pipe 3, and the water retaining rib 11 and the sealing ring 13 can realize the sealing effect.

The bottom of the diversion trench 15 is arc-shaped, so that the polyethylene flexible pipe 3 is easier to fill after being clamped without gaps, the diversion trench 15 is of a rectangular structure or a triangular structure, the inner wall of the pipe is not easy to fill, and the pipe can be sealed by the sealing ring 13, but the layer-by-layer sealing blocking effect of the water retaining rib 11 is reduced.

The machining direction of the diversion trench 15 is different from the generally cylindrical machining direction of the pipe fitting nozzle 10, the pipe fitting needs to be machined by different equipment such as a milling machine and the like, the machining cost is high, the pipe fitting can also be formed by injection molding, and the pipe fitting body 1 is made of plastic materials. The plastic injection molding one-step molding is adopted, the molding is fast, the cost is low, and the complex structure can be completed. The plastic can be PPSU, PSU, nylon, etc.

The pipe clamping tool is shown in figure 1 in specification of "an improved clamping and pressing pipe" with publication number CN 106969218A, and has two semicircular structures with middle joint. The pipe sleeve 2 after clamping is in a non-complete round shape, generally in an oval shape, and the pipe fitting nozzle 10 is stressed unevenly. As the pipe expands with heat and contracts with cold for a long time, the nozzle 10 of the pipe fitting becomes loose, if the pipe fitting rotates at a direct equal part, the rotation of the pipe fitting can cause the sealing failure of the pipe fitting to cause leakage.

In the invention, more than two anti-rotation convex teeth 16 are arranged at the rear part of the sealing ring 13 of the pipe fitting nozzle head 10. After the pipe fitting is clamped, the inner wall of the polyethylene flexible pipe 3 can be tightly held with the anti-rotation convex teeth 16, so that the pipe fitting is prevented from rotating. The anti-rotation teeth 16 may also be distributed in a complete circle, as shown in the drawings. The figure is provided with two complete turns of the anti-rotation teeth 16. The anti-rotation convex teeth 16 are not suitable for hard pipes such as copper pipes and stainless steel pipes in structure, and polyethylene flexible pipes are moderate in hardness and can realize effective plastic deformation with the anti-rotation convex teeth 16.

The top of the anti-rotation convex tooth 16 is not higher than the outer diameter of the water retaining rib 11. This structure makes the rotation preventing teeth 16 not affect the sealing of the water blocking rib 11.

The anti-rotation structure of the pipe fitting is clamped, so that the long-term stability of the sealing of the pipe fitting can be ensured.

An annular groove 17 is arranged at the rear section of the anti-rotation convex tooth 16, and a backflow baffle spacer ring 18 is arranged in the annular groove 17 to prevent external water seepage and air inflow and corrosion or pollution of the external to the inner wall of the polyethylene flexible pipe 3. The water quality is required to be high, and the attention is particularly paid. The reverse flow barrier 18 is typically mounted in a bottom position on the tubing.

As shown in fig. 3, the second preferred embodiment is substantially the same as the first embodiment, and the second embodiment is different from the first embodiment in that the externally threaded direct body 1 is a pressure-clamping pipe body 1 of an internally threaded tee. The utility model provides a polyethylene class is clamp pressure pipe fitting for flexible pipe, includes a pipe fitting body 1, has two pipe fitting nozzles 10 on the pipe fitting body 1 to and fix the pipe box 2 in pipe fitting nozzle 10 bottom, be equipped with manger plate muscle 11 on the pipe fitting nozzle 10, and sealing washer 13 in seal groove 12, transversely be equipped with guiding gutter 15 on the manger plate muscle 11, guiding gutter 15 runs through the bottom from pipe fitting nozzle 10 head. The diversion trench 15 is a shallow trench and does not touch the bottom of the sealing trench 12; the guide grooves 15 are distributed on the pipe fitting nozzle 10 in 2.

The back part of the sealing ring 13 of the pipe fitting nozzle 10 is provided with more than two anti-rotation convex teeth 16. The anti-rotation convex teeth 16 are distributed in a whole circle.

The pipe clamping body 1 is made of plastic materials, and a pipe nozzle 10, a diversion trench 15 and an anti-rotation convex tooth 16 on the pipe clamping body 1 are formed in one step.

The rear end of the anti-rotation convex tooth 16 is also provided with an annular groove 17, and a backflow baffle ring 18 is arranged in the annular groove 17.

In a third preferred embodiment, shown in figure 4, a third embodiment is an elbow-type crimp body 1, substantially as in the first embodiment. The utility model provides a polyethylene class is clamp pressure pipe fitting for flexible pipe, includes a pipe fitting body 1, has two pipe fitting nozzles 10 on the pipe fitting body 1 to and fix the pipe box 2 in pipe fitting nozzle 10 bottom, be equipped with manger plate muscle 11 on the pipe fitting nozzle 10, and sealing washer 13 in seal groove 12, transversely be equipped with guiding gutter 15 on the manger plate muscle 11, guiding gutter 15 runs through the bottom from pipe fitting nozzle 10 head. The diversion trench 15 is a shallow trench and does not touch the bottom of the sealing trench 12; the flow guide grooves 15 are distributed on the pipe fitting nozzle 10 by 1.

The rear part of the sealing ring 13 of the pipe fitting nozzle 10 of the embodiment is provided with an anti-rotation convex tooth 16 distributed in a whole circle.

The rear end of the anti-rotation convex tooth 16 is not provided with a backflow baffle ring 18.

The clamping pipe fitting for the polyethylene flexible pipe provides a new solution for the problem of missed clamping caused by no-pressing and no-leakage of the pipe fitting, and improves the problems of leakage caused by loosening and rotation of the pipe fitting after clamping, water seepage and air inflow under negative pressure. The safety of pipe fitting installation and the sealing reliability in later stage are further improved. The pipe fitting structure provided by the invention is in practice, high in practicability and has market popularization value.