CN217540058U - Pipe fitting is with smooth tight cover and pipe fitting connection structure - Google Patents

Abstract

The utility model provides a pipe fitting is with smooth tight cover and pipe connection structure relates to pipe connection technical field. The pipe fitting is with smooth tight cover as pipe fitting with smooth tight cover through main part cooperation sleeve pipe, utilizes the cooperation of the first connecting piece in the main part and the second connecting piece on the sleeve pipe to assemble, and the host material is plastics, and the material of pipe box is the metal, can not ftracture during the installation, can reach increase tensile strength's purpose in reduce cost. The main part hole is equipped with the anticreep arch, can prevent after the installation that smooth tight cover is deviate from, uses safelyr. The device has the advantages of simple and compact structure, low cost and environmental protection, and can improve the competitiveness of products.

Description

Pipe fitting is with smooth tight cover and pipe fitting connection structure

Technical Field

The utility model relates to a pipe connection technical field particularly, relates to a pipe fitting is with smooth tight cover and pipe connection structure.

Background

Pipe fittings commonly used in the pipeline industry are of the clamp-on type, the quick-connect type, the flaring slide-on type, the flaring memory type, the ferrule type connection type and the like. The flaring sliding-tight type connecting pipe fitting and the clamping-pressing type pipe fitting have the advantages of large flow, simple structure and firm connection and are widely applied.

The sliding and tightening type pipe fitting tightly tightens the outer circular surface of the pipe fitting through the inner hole of the sliding and tightening sleeve, so that the plastic layer on the inner wall of the pipe fitting is embedded into the concave-convex teeth of the core body of the pipe fitting for forced sealing. Therefore, the slip sleeve is subjected to strong hoop stress, so that the slip sleeve is required to have high tensile strength, cannot crack, cannot become soft and yield under a high-temperature working condition environment, and is easy to leak water.

The existing slip sleeve on the market is mostly formed by hot forging and pressing copper materials and then machining, and although the slip sleeve is high in strength and cannot crack during installation and use, the cost is too high. The PVDF single plastic integral injection molding sliding tight sleeve is also available on the market, certain risks exist in the sliding tight sleeve, cracks are easy to appear on a glue inlet or a die assembly line after the sliding tight sleeve is used for a period of time, the tensile strength of the material is easy to decline at a higher water temperature, the pipe and the pipe cannot be tightly clamped, the required sealing specific pressure cannot be ensured, the pipe leaks or is separated from the pipe, and unnecessary economic loss is caused. In addition, the PVDF material is expensive, the material cost is increased if the sliding sleeve is made to be thick, and injection molding defects such as shrinkage, air holes and the like are easy to occur in production.

Therefore, it is an urgent technical problem in the art to provide a high-strength, safe and reliable, low-cost slip-fit sleeve for pipe fittings.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pipe fitting is with smooth tight cover and pipe connection structure increases the tensile strength of smooth tight cover when aiming at reduce cost, is showing the emergence that reduces the fracture condition.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a pipe fitting is with smooth tight cover, including the main part and be used for the pipe box of cover locating on the main part, main part and pipe box all are hollow tubulose, the main part has the first end that is used for supporting the fender position on the pipe fitting and the second end opposite with first end, be provided with first connecting piece on the second end of main part, be provided with the second connecting piece that cooperatees with first connecting piece on the pipe box and the corresponding tip of the second end of main part, so as to make main part and pipe box assemble through the cooperation of first connecting piece and second connecting piece;

the main body is made of plastic, and the pipe sleeve is made of metal.

In an alternative embodiment, an end convex ring extending along the axial direction is arranged at the opening part of the inner hole at the second end of the main body, a plurality of connecting bosses distributed at intervals are annularly arranged on the outer wall of the end convex ring, and the outside diameter of each connecting boss is smaller than that of the outer circular surface of the main body;

a plurality of first inner bulges are annularly arranged in an inner hole at the end part of the pipe sleeve, and an embedded groove matched with the connecting boss is formed between every two adjacent first inner bulges;

when the pipe sleeve is arranged on the main body, the first inner bulge is embedded between the two adjacent connecting bosses and abuts against the outer wall of the end convex ring.

In an alternative embodiment, a flare is provided at the bore port of the first end of the body.

In an alternative embodiment, the single side angle of the flare is 20 ° -30 °.

In an alternative embodiment, a transition fillet is provided between the inclined surface of the bell mouth and the inner cylindrical surface of the main body.

In an optional embodiment, an outer convex ring for abutting against a stop on the pipe fitting is arranged on the outer circular surface of the bell mouth of the main body, and the length of the pipe sleeve is smaller than that of the main body, so that when the main body and the pipe sleeve are assembled, the end part of the pipe sleeve abuts against the outer convex ring of the main body.

In an optional embodiment, a plurality of inclined inverted tooth-shaped second inner protrusions are arranged on the inner cylindrical surface of the main body at intervals along the circumferential direction, the thickness of the second inner protrusions is gradually increased from a position close to the first end to the opposite other end, and the inner diameter of the tooth tops of the second inner protrusions is matched with the outer diameter of the pipe in a free state before installation.

In an alternative embodiment, the second inner projection is located on an inner cylindrical surface of the body adjacent the flare.

In a second aspect, the present invention provides a pipe connecting structure, which comprises a pipe body, a pipe and a sliding sleeve for the pipe in any one of the above embodiments, wherein the sliding sleeve is used for fastening the joint of the pipe body and the pipe.

In an optional embodiment, an end of the tube is sleeved on the core section of the tube body, and the main body of the sliding sleeve is sleeved on the end of the tube and abuts against the abutment of the tube body by using the first end of the main body.

The embodiment of the utility model provides a beneficial effect is: as the sliding sleeve for the pipe fitting, the main body is matched with the sleeve, the first connecting piece on the main body and the second connecting piece on the sleeve are matched for assembly, the main body is made of plastic, the pipe sleeve is made of metal, and the pipe sleeve cannot crack during installation and can achieve the purpose of increasing the tensile strength while reducing the cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic structural view of a sliding sleeve for pipe fittings according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the slip collar for the tubular member of FIG. 1;

FIG. 3 is a cross-sectional view of the pipe fitting of FIG. 1 installed with a slip collar;

FIG. 4 is a schematic structural view of the pipe fitting of FIG. 1 after being installed with a slip cover;

FIG. 5 is a schematic structural view of the pipe fitting body of FIG. 3;

FIG. 6 is a cross-sectional view of the body of FIG. 1;

FIG. 7 is a first perspective view of the main body of FIG. 1;

FIG. 8 is a second perspective view of the slip cover for pipe fitting of FIG. 1;

FIG. 9 is a first perspective view of the shroud of FIG. 1;

FIG. 10 is a second perspective view of the shroud of FIG. 1;

fig. 11 is a working principle diagram of the sliding tight sleeve for the pipe fitting in fig. 1.

100-sliding sleeve for pipe fitting; 001-first end; 002-a second end; 110-a body; 111-end bulge loop; 112-connecting boss; 113-a bell mouth; 114-transition fillets; 115-convex ring; 116-a second inner protrusion; 120-pipe sleeve; 121-a first inner protrusion; 122-embedded groove; 200-a pipe fitting body; a core segment-210; 300-pipe.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the attached drawings in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, an embodiment of the present invention provides a sliding sleeve 100 for a pipe, including a main body 110 and a sleeve 120 for covering the main body 110, wherein the sliding sleeve in a sleeve form is used, the main body 110 is made of plastic, the sleeve 120 is made of metal, and the sliding sleeve does not crack during installation, so as to achieve the purpose of increasing tensile strength while reducing cost.

Specifically, the slip collar 100 for a pipe is used for fastening a joint of a pipe body 200 and other pipes, and the structure of the pipe body 200 is shown in fig. 5, which is a common type of pipe. The pipe body 200 has a stop, the main body 110 and the socket 120 are both hollow pipes, the main body 110 has a first end 001 for stopping the stop on the pipe body and a second end 002 opposite to the first end 001, and after the pipe slip sleeve 100 is installed, the first end 001 stops the stop on the pipe body 200. More specifically, the socket 120 has an annular thin tubular shape and the main body has an annular tubular shape.

In order to make the main body 110 and the socket 120 be assembled together better, a first connector is provided on the second end 002 of the main body 110, and a second connector, which is engaged with the first connector, is provided on an end of the socket 120 corresponding to the second end 002 of the main body 110, so that the main body 110 and the socket 120 are assembled by the engagement of the first connector and the second connector. The first connector and the second connector may be engaged with each other in any form, such as a common engaging groove and a protrusion, or in any other form, so that the ends of the main body 110 and the sleeve 120 can be assembled.

Referring to fig. 6-10, an end protruding ring 111 extending along the axial direction is disposed at the mouth of the inner hole at the second end 002 of the main body 110, a plurality of connecting bosses 112 are annularly disposed on the outer wall of the end protruding ring 111, and the outer diameter of the connecting bosses 112 is smaller than the outer circular surface diameter of the main body 110; correspondingly, the inner hole of the end of the pipe sleeve 120 is annularly provided with a plurality of first inner protrusions 121, an embedded groove 122 matched with the connecting boss 112 is formed between two adjacent first inner protrusions 121, and the inner hole diameter of the first inner protrusions 121 is slightly larger than the inner cylindrical surface diameter of the main body 110. When the pipe sleeve 120 is mounted on the main body 110, the first inner protrusion 121 is inserted between two adjacent connecting bosses 112 and abuts against the outer wall of the end protruding ring 111. Thus, the assembly of the body 110 and the sleeve 120 is accomplished with highly mating end structures.

Specifically, the size of the first inner protrusion 121 is adapted to the distance between two adjacent connecting bosses 112 on the main body 110, so that the size of the first inner protrusion 121 is slightly smaller than the distance between two adjacent connecting bosses 112; the size of the connection boss 112 is adapted to the size of the insertion groove 122, so that the size of the connection boss 112 is slightly smaller than the size of the insertion groove 122. The inner diameter of the tube housing 120 is adapted to the outer diameter of the cylindrical circumference of the main body 110, so that the inner diameter of the tube housing 120 is slightly larger than the outer diameter of the cylindrical circumference of the main body 110.

In some embodiments, a flared opening 113 is provided at the inner hole port of the first end 001 of the main body 110, and the shape of the flared opening 113 means that the inner diameter is gradually increased, which can facilitate installation. The single-side angle of the bell mouth 113 is 20 degrees to 30 degrees, the single-side angle is the included angle between the curved surface of one side and the plane of the central axis, and is the outward expansion angle.

Furthermore, a transition fillet 114 is arranged between the inclined plane of the bell mouth 113 and the inner cylindrical surface of the main body 110, so that the sliding and tight sleeve can be more smoothly installed by the transition of the bell mouth and the R fillet. Transition radius 114 may be a radius from R5 to R8.

In some embodiments, an outer convex ring 115 for abutting against a stop on the pipe body 200 is disposed on an outer circumferential surface of the bell mouth 113 of the main body 110, and the length of the socket 120 is smaller than that of the main body 110, so that when the main body 110 and the socket 120 are assembled, one end of the socket 120 abuts against the outer convex ring 115 of the main body 110, as shown in fig. 1, and the other end is assembled by the cooperation of the first connecting member and the second connecting member. The end of the metal pipe sleeve 120 does not directly contact the copper body for a long time after installation, thereby avoiding the occurrence of galvanic corrosion.

In some embodiments, a plurality of second inner protrusions 116 having an inclined inverted tooth shape are disposed at intervals along the circumferential direction on the inner cylindrical surface of the main body 110, the thickness of the second inner protrusions 116 increases gradually from the position near the first end 001 to the opposite end, and the inner diameter of the tooth tops of the second inner protrusions 116 is adapted to the outer diameter of the pipe in the free state before installation, so that the inner diameter of the tooth tops of the second inner protrusions 116 may be slightly larger than the outer diameter of the pipe in the free state before installation. The inverted tooth-shaped bulge can prevent the sliding sleeve from slipping after installation, and the use is safer. The friction resistance of the outer circle of the pipe facing the sliding sleeve can be reduced when the sliding sleeve is pushed to be installed on the inclined surface, and the installation is easier.

The second inner protrusion 116 is circumferentially arranged, and the specific position is not limited, and may be on the inner cylindrical surface of the main body 110.

In some embodiments, the second inner protrusion 116 is located on the inner cylindrical surface of the body 110 near the flare 113 to facilitate smooth installation.

Specifically, the main body 110 may be made of engineering plastics such as high-temperature nylon, PPSU, or PVDF, and is an existing material, and the specific type is not limited; the shroud 120 may be stamped from sheet metal, such as 304 stainless steel or aluminum alloy. During preparation, the pipe sleeve 120 can be used as a framework to be injection molded with the main body 110, or the pipe sleeve 120 and the main body 110 can be separately manufactured and then are assembled together in an interference fit manner.

Referring to fig. 3 and fig. 11, an embodiment of the present invention provides a pipe connection structure, including a pipe body 200, a pipe 300 and the sliding sleeve 100 for pipe, where the sliding sleeve 100 for pipe is used to fasten a joint between the pipe body 200 and the pipe 300.

Specifically, the end of the tube 300 is sleeved on the core section 210 of the tube body 200, the main body 110 of the sliding sleeve is sleeved on the end of the tube 300, and the first end 001 of the main body 110 abuts against the abutment of the tube body 200.

The manufacturing process of the slip sleeve is as follows: (1) Firstly, manufacturing the pipe sleeve 120, wherein the pipe sleeve 120 is in an annular thin pipe shape and can be formed by punching metal plates such as stainless steel or aluminum alloy and the like; (2) The main body 110 is made of engineering plastics, the manufactured pipe sleeve 120 can be preferably placed in a mold and directly injected into a sliding sleeve integrating the pipe sleeve 120 and the main body 110, and the pipe sleeve and the main body are firmly connected by the production process and are not easy to separate; (3) Alternatively, body 110 may be separately injection molded and then assembled with sleeve 120 in a tight fit.

Referring to fig. 5 and 11, the installation and use process is as follows: (1) Cutting the pipe 300 capable of flaring to enable the end face of the pipe 300 to be flat; (2) Sleeving the non-flared end of the sliding sleeve into the pipe 300 and moving the non-flared end away from the pipe 300 by about 50mm to reserve a pipe flaring section; (3) flaring the pipe port by using a special flaring tool; (4) moving the sliding sleeve to the pipe end opening to the flaring section; (5) Inserting the core section 210 of the pipe fitting body 200 into the flared pipe end hole; (6) The sliding sleeve is pushed upwards towards the body core body by a special sliding tool, and the sliding sleeve slides to the horn mouth end face and is abutted to the core body to abut against a gear.

To sum up, the utility model provides a smooth tight cover and pipe connection structure for pipe fitting, this pipe fitting are equipped with metal pipe box and cladding plastics main part with smooth tight cover, and the installation is used and can not ftracture, has increased tensile strength again when reduce cost. The main part hole is equipped with the anticreep arch, can prevent after the installation that smooth tight cover is deviate from, uses safelyr. The device has the advantages of simple and compact structure, low cost and environmental protection, and can improve the competitive power of products.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A sliding and tightening sleeve for a pipe fitting is characterized by comprising a main body and a pipe sleeve sleeved on the main body, wherein the main body and the pipe sleeve are both in a hollow pipe shape, the main body is provided with a first end used for abutting against a stop position on the pipe fitting and a second end opposite to the first end, a first connecting piece is arranged on the second end of the main body, and a second connecting piece matched with the first connecting piece is arranged on the end part, corresponding to the second end of the main body, of the pipe sleeve, so that the main body and the pipe sleeve are assembled through the matching of the first connecting piece and the second connecting piece;

the main body is made of plastic, and the pipe sleeve is made of metal.

2. The slip collar for pipe fittings according to claim 1, wherein an end portion protruding ring extending in the axial direction is provided at a mouth portion of the second end inner hole of the main body, a plurality of connecting bosses are annularly provided on an outer wall of the end portion protruding ring at intervals, and an outer diameter of each connecting boss is smaller than an outer circular surface diameter of the main body;

a plurality of first inner bulges are annularly arranged in an inner hole at the end part of the pipe sleeve, and an embedded groove matched with the connecting boss is formed between every two adjacent first inner bulges;

when the pipe sleeve is arranged on the main body, the first inner bulge is embedded between two adjacent connecting bosses and abuts against the outer wall of the end convex ring.

3. The slip collar for pipe fittings of claim 1, wherein a flare is provided at an inner bore port of said first end of said body.

4. A slip collar for pipe elements according to claim 3, wherein said flare has a single angle of 20 ° to 30 °.

5. The slip collar for pipe according to claim 4, wherein a transition fillet is provided between the inclined surface of the bell mouth and the inner cylindrical surface of the main body.

6. The slip cover for pipe according to any one of claims 3 to 5, wherein an outer convex ring for abutting against a stop on a pipe is provided on an outer circumferential surface of the bell mouth of the main body, and a length of the socket is smaller than that of the main body, so that an end of the socket abuts against the outer convex ring of the main body when the main body and the socket are assembled.

7. The slip collar for pipe fittings according to claim 6, wherein a plurality of second inner protrusions having an inclined inverted tooth shape are provided at intervals in a circumferential direction on the inner cylindrical surface of the main body, the thickness of the second inner protrusions increases gradually from a position near the first end to the opposite end, and the inner diameter of the tooth tops of the second inner protrusions is adapted to the outer diameter of the pipe fitting in a free state before installation.

8. A slip collar for a pipe fitting according to claim 7, wherein said second inner protrusion is located on an inner cylindrical surface of said body adjacent said flare.

9. A pipe connecting structure comprising a pipe body, a pipe, and the sliding clinch for pipe of any one of claims 1 to 8, the sliding clinch being used to fasten a junction of the pipe body and the pipe.

10. The tubular connection structure of claim 9, wherein an end of the tubular member is sleeved on the core section of the tubular body, and the main body of the sliding sleeve is sleeved on the end of the tubular member and abuts against the abutment of the tubular body by the first end of the main body.

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