CN111237572A

CN111237572A - Detachable connecting plastic pipe fitting

Info

Publication number: CN111237572A
Application number: CN202010073931.XA
Authority: CN
Inventors: 马胜; 饶攀; 孙宽
Original assignee: Linhai Weixing New Building Materials Co Ltd
Current assignee: Linhai Weixing New Building Materials Co Ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-06-05

Abstract

The invention discloses a detachable plastic pipe fitting, which relates to the field of plastic pipe connection and comprises a pipe fitting main body and a pipe locking piece, wherein the pipe fitting main body is provided with at least one joint part and at least one claw part; when the pipe is inserted into the pipe fitting main body, the pipe locking piece is tightly matched with the pipe fitting main body, so that the clamping claw part can clamp the pipe. The invention optimally adopts an integrated structure design, reduces the number of parts, simplifies the disassembly and assembly process, improves the sealing effect and is beneficial to the socket fit of the pipe.

Description

Detachable connecting plastic pipe fitting

Technical Field

The invention relates to the field of plastic pipeline connection, in particular to a detachable plastic pipe fitting.

Background

In the construction of water supply, irrigation and drainage systems, the pipe fitting is an indispensable component, plays an important role in a pipeline system and has the function of water delivery and distribution. In the construction of piping system, the length of tubular product is too long then be unfavorable for its transportation and arrange, and for the convenience of transportation, tubular product has the length that is fit for the carrier transport usually, and this just makes needs tubular product connecting device to connect the pipe fitting to satisfy the operator and connect the realization of its drainage function to the pipe fitting.

Water supply, irrigation and drainage pipes are widely used in plastic pipes, the pipes of which are generally extruded from PVC-U, PP, PE, ABS and CPVC plastics, and the pipes are generally injection molded. In order to adapt to emergency sites with different ground surfaces, underground and off-ground surfaces and occasions of mobile transition and anchor-free repeated laying, the plastic pipes and the pipe fittings are generally detachably connected so as to facilitate assembly and disassembly construction and mobile carrying.

In the market, some detachable pipe fittings adopt stainless steel annular jaw parts, after the detachable pipe fittings are connected, the jaws clamp the plastic pipe to damage the surface of the low-hardness plastic pipe, and the damaged plastic pipe can damage a sealing ring in the repeated dismounting process to cause leakage of a sealing position; some detachable connecting pipe fittings are not suitable for being connected with the rigid pipe and comprise an internal support structure, so that the effective drift diameter of the pipeline is reduced; in some detachable connecting pipe fittings, as the structure of the connecting cap which is abutted against the inclined plane of the fastening opening of the pipe fitting connecting body is a rigid plastic cylindrical surface, the connecting cap is not connected with plastic pipe fittings with different size errors and shape errors to form a flexible sealing structure, and the sealing surface is easy to form an arch gap to cause leakage at the connecting part; some detachable pipe fittings contain a cutting sleeve part combined structure, wherein the cutting sleeve for clamping the pipe fitting and the pipe fitting body do not have a radial positioning structure, and the coaxiality of the cutting sleeve clamping inner circle and the groove of the sealing ring is in a free state, so that the sealing circumference of the pipe fitting clamped by the sealing ring and the cutting sleeve is not tight, and the leakage phenomenon at the sealing position is easy to cause; some detachable connection pipe fittings comprise pipe fitting body, nut, sealing washer spacer sleeve, cutting ferrule and sealing washer part, and four are no less than to the variety, and the cutting ferrule adopts the shaping of high strength elastic material to make, and three kinds are no less than to the shaping material kind, and manufacturing cost is high. In addition, there are certain pressures and impact forces within the plumbing system for water supply, irrigation and drainage, and therefore, it is important that the detachably attachable plastic pipe has a reliable construction.

Disclosure of Invention

Based on the problems of the existing detachable pipe fitting and in order to solve the problems of the existing detachable pipe fitting, the invention provides the detachable plastic pipe fitting which adopts an integrated structural design, reduces the number of parts, simplifies the disassembly and assembly process, improves the sealing effect and is beneficial to the socket fit of the pipe.

So that to the problem that above-mentioned existing detachable coupling pipe spare exists, propose following technical scheme:

a detachable plastic pipe fitting comprises a pipe fitting main body and a pipe locking piece, and is characterized in that the pipe fitting main body is provided with at least one joint part and at least one claw part, the joint part and the claw part are integrally formed with the pipe fitting main body, and the claw part is provided with a lateral tensioning opening; when the pipe is inserted into the pipe fitting main body, the pipe locking piece is tightly matched with the joint part and the clamping claw part, so that the clamping claw part can clamp and fix the pipe.

At least one sealing ring groove is formed in the inner wall of the joint part, and a sealing ring is arranged in the sealing ring groove in a pre-sealing matched mode.

An isolation groove is arranged between the joint part and the clamping claw part, and a bending groove is inwards arranged on the opposite side of the isolation groove.

The outer edge of the claw part is provided with at least one glue reducing groove; if the number of the glue reducing grooves is 2 or more, a convex part is formed between every two adjacent glue reducing grooves.

The inner wall of the clamping claw part is provided with a row of teeth.

The inner wall of the clamping claw part is provided with a row of teeth, the row of teeth are provided with a plurality of bending grooves in the axial direction, and the bending grooves are arranged at equal intervals along the radial direction.

The tooth row comprises claw teeth, and the claw teeth comprise front side tooth side parts, front side tooth side parts and tooth cusps formed by intersecting the front side tooth side parts and the front side tooth side parts, the rear side tooth side parts and the tooth cusps are of an integral structure.

An assembly and disassembly gap is reserved in the inner wall of the joint.

The joint part comprises a threaded part, and a through hole is formed in the threaded part inwards.

The utility model discloses a pipe fitting, including pipe locking part, claw, screw thread portion, pipe locking part inner wall and claw portion outer fringe, screw up pipe locking part wedging claw portion when connecting, pipe locking part has the adjustment allowance at the tip of claw tooth direction, pipe locking part outer fringe and set up on the pipe fitting main part and twist and change and glue.

The technical effects brought by adopting the technical means are as follows:

1. the detachable plastic pipe fitting provided by the invention adopts an integrated structure design, the number of single-end parts of the pipe fitting is reduced by 2, and the manufacturing cost is greatly reduced.

2. The pipe fitting main part adopts the integrated design, has reduced pipe fitting built-up part quantity, has improved the installation and has dismantled efficiency, can full play detachable simple and convenient efficient advantage of hookup.

3. The sealing ring groove is integrated, so that the self-sealing function of the sealing ring can be favorably exerted, the connection sealing position of a pipeline with higher pressure can be ensured not to leak for a long time, and the sealing effect is improved; and meanwhile, the sealing ring is frequently disassembled and assembled, so that the installation of the sealing ring is not influenced.

4. The invention adopts an integrated clamping jaw structure, and can realize multi-point deformation fastening by utilizing structures such as a lateral tensioning opening, a bending groove and the like, thereby improving the fastening inosculation with the pipe; the tooth arrangement structure is optimized, the occlusion property of the pipe is improved, the friction is enhanced, and the tightness is improved; the optimized arrangement of the glue reducing groove is beneficial to balancing the wall thickness of the pipe fitting body so as to avoid shrinkage deformation caused by uneven wall thickness and reduce material consumption.

5. The invention optimizes the assembly and disassembly clearance, can improve the socket fault tolerance rate of the pipe, avoids the problem that effective socket butt joint cannot be realized due to the dimension error of individual pipes, can realize the forward and backward movement along the length direction and realize the position adjustment.

6. The detachable plastic pipe fitting provided by the invention has the advantages that the phenomenon that the sealing ring, the sealing ring retaining sleeve and the clamping sleeve scatter when the pipe fitting is detached is avoided, and the detachable plastic pipe fitting has safe and reliable use effects.

7. The detachable plastic pipe fitting provided by the invention can be suitable for occasions with different specifications and different requirements by changing the specification and the form of the pipe fitting interface.

Drawings

FIG. 1 is a schematic cross-sectional view of a detachably attachable plastic pipe according to the present invention;

FIG. 2 is a schematic cross-sectional view of an integral structure of a detachably connectable plastic pipe according to the present invention;

FIG. 3 is a schematic front view of an integrated structure of a detachable plastic pipe according to the present invention;

FIG. 4 is a schematic cross-sectional view of a tube locking member for detachably connecting plastic tubes according to the present invention;

FIG. 5 is a schematic, partially cross-sectional, right-side view of a detachably connectable plastic pipe according to the present invention;

FIG. 6 is a cross-sectional view of a twist-tie portion of a detachably attachable plastic pipe of the present invention;

FIG. 7 is a sectional view of a portion of a glue reducing groove of a detachably attachable plastic pipe according to the present invention;

FIG. 8 is a right side view of the claw portion of the detachable plastic tube of the present invention;

FIG. 9 is a schematic cross-sectional view of one embodiment of a plastic tubing with a releasable connection provided by the present invention;

FIG. 10 is a schematic cross-sectional view of another embodiment of the present invention having a detachably attachable plastic tube;

FIG. 11 is a schematic view of the internal structure of another embodiment of the present invention with a detachable plastic tube;

FIG. 12 is a cross-sectional view of another embodiment of a detachably attachable plastic tube provided by the present invention;

FIG. 13 is a cross-sectional view of another embodiment of a detachably attachable plastic tube provided by the present invention;

FIG. 14 is a cross-sectional view of another embodiment of a detachably attachable plastic tube provided by the present invention;

FIG. 15 is a cross-sectional view of another embodiment of the present invention having a detachably attachable plastic tube;

FIG. 16 is a cross-sectional view of another embodiment of the present invention having a detachably attachable plastic tube;

FIG. 17 is a cross-sectional view of one embodiment of a plastic tube having a releasable connection provided by the present invention;

FIG. 18 is a cross-sectional view of another embodiment of the present invention with a detachable plastic tube.

In the figure: the plastic pipe fitting comprises a plastic pipe fitting assembly-1, a pipe fitting main body-11, a joint part-111, a sealing ring groove-1111, a sealing ring-1112, a threaded part-1113, a through hole-1114, a clamping claw part-112, an isolation groove-113, a bending groove-114, a tensioning opening-1121, a glue reducing groove-1122, a convex part-1123, a tooth arrangement-1124, a bending groove-1125, a pipe locking part-12, a screwing and rotating part-13, an assembling and disassembling gap-1115, an adjusting allowance-121 and a pipe-2.

Detailed Description

The invention is further described below in conjunction with fig. 1-18 and the detailed description.

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

The invention provides a detachable plastic pipe fitting, which comprises a pipe fitting main body 11 and a pipe locking piece 12, wherein the pipe fitting main body 11 is provided with at least one joint part 111 and at least one claw part 112, the joint part 111 and the claw part 112 are integrally formed with the pipe fitting main body 11, and the claw part 112 is provided with a lateral tensioning opening 1121; when the pipe is inserted into the pipe main body 11, the pipe locking member 12 is tightly matched with the joint part 111 and the claw part 112, so that the claw part 112 can clamp and fix the pipe, the number of pipe assembling parts is reduced, the assembling and disassembling efficiency is improved, and the characteristics of simplicity, convenience and high efficiency of detachable connection can be fully exerted. Specifically, in the present embodiment of the invention, the claw portion 112 is a tightening structure under the action of external force, and is converged to the tension opening 1121, and one end portion thereof is integrally formed with the joint portion 111, and the claw portion 112 is a clamping section of the invention, and has a guiding cone at an inlet of the clamping section, so that the pipe is not damaged or failed when being repeatedly disassembled and assembled. It is worth mentioning that after the pipe 2 is inserted into the detachable plastic pipe, an assembly and disassembly gap 1115 is formed between the pipe 2 and the joint part 111, specifically, the assembly and disassembly gap 1115 is reserved on the inner wall of the joint part 111, and the joint part 111 includes a socket section and a through-diameter section, the socket section and the through-diameter section are adjacent sections and are communicated with each other. More specifically, the tube lock member 12 has a certain adjustment margin 121 at an end in the direction of the claw portion 112. Joint portion 111 has T type or zigzag external screw thread, pipe retaining member 12 with joint portion 111 external screw thread closes soon, and pipe retaining member 12 inner wall has the circular conical surface with jack catch portion 112 outer fringe, screws up pipe retaining member 12 and wedges jack catch portion 112 during the connection, and its claw fastening pipe 2, unscrews pipe retaining member 12 during the dismantlement, and integrative jack catch portion 112 kick-backs and opens, and the claw loosens pipe 2 thereupon. Here, the setting of adjustment allowance 121 utilizes the characteristics that screw transmission has adjustability and auto-lock, adjusts jack catch 112A through twisting tubular product retaining member 12 and keeps suitable lasting clamping-force to tubular product 2. The pipe locking member 12 of the present invention is not limited to any shape, and has a locking through hole having an inner thread on an inner wall thereof to be coupled with the outer thread of the joint portion 111 in a fitting manner, and in the present embodiment of the present invention, the pipe locking member 12 has a nut structure, and in a process of being coupled with the pipe main body 11, the claw portion 112 is contracted to thereby clamp the pipe 2.

Furthermore, at least one sealing ring groove 1111 is formed in the joint portion 111 or the inner wall of the pipe body 11, and the sealing ring groove 1111 is provided with a sealing ring 1112 in a matching manner. Specifically, the pipe main body 11 having the seal ring groove 1111, the joint portion 111, and the claw portion 112 are integrally formed, or the joint portion 111 having the seal ring groove 1111, the claw portion 112 are integrally formed with the pipe main body 11. Due to the design of the sealing ring groove 1111, the number of varieties of parts of pipe fittings is reduced, and the self-sealing performance of the sealing ring 1112 is improved. Based on the leakage phenomenon generated when the pipe 2 is connected, the pipe must have a flexible sealing ring 1112 suitable for being connected with plastic pipes with different size errors, shape errors and assembling and disassembling gaps 1115, aiming at the sealed piece which is a rigid round pipe 2, in addition to selecting a material with flexible sealing as a sealing ring 1112 part, the invention combines a sealing ring 1112 sleeve part with the joint part 111, and the pipe main body 11, the joint part 111 and the clamping claw part 112 are integrally formed to have a sealing ring groove structure 1111. It is worth mentioning that the sealing ring groove 1111 is an annular groove, which replaces the original sealing ring 1112 sleeve part.

Furthermore, the joint part 111 and the claw part 112 are integrally formed to have an isolation groove 113, and the joint part 111 and the claw part 112 are integrally formed to have a curved groove 114 inwardly opened at the opposite side of the isolation groove 113, so as to reduce the overall weight and increase the contraction elasticity of the claw part 112.

Furthermore, at least one glue reducing groove 1122 is formed inward at intervals on the outer edge of the claw part 112, and if two or more glue reducing grooves 1122 are formed, a convex part 1123 is formed between two adjacent glue reducing grooves 1122. The design of the glue reducing groove 1122 reduces the weight of the whole detachable plastic pipe fitting, not only balances the wall thickness of the joint part 111, but also ensures the dimensional accuracy of the joint part 111, and avoids the influence of uneven shrinkage deformation of the wall thickness on the connection and the assembly and disassembly performance. It is noted that the overall outer edge of the projection 1123 is a conical surface, and the inner wall of the fitting portion of the tube locking member 12 is also a conical surface. Specifically, the integrally formed position of the claw part 112 and the joint part 111 is provided with an isolation groove 113 from the outer edge of the formed position inwards, in the embodiment of the invention, the length of the isolation groove 113 is greater than the radius of the circular surface in the forming direction, the opposite side of the integrally formed position is provided with a bent groove 114 from the outer edge inwards, and the bent groove 114 and the isolation groove 113 enable the integrally formed position to have a reasonable structure, so that the weight of the whole pipe fitting is reduced, and the contraction elasticity of the pipe fitting is increased.

Further, the inner wall of the claw part 112 is provided with a row of teeth 1124. In the present embodiment of the invention, namely, the inner wall of the claw part 112 is provided with the row teeth 1124, the row teeth 1124 are a group of teeth formed by axially and equidistantly juxtaposed teeth, the teeth comprise a front tooth side part, a rear tooth side part and a tooth tip formed by intersecting the front tooth side part and the rear tooth side part, and the tooth tip, the front tooth side part, the rear tooth side part and the tooth tip are of an integral structure. The teeth 1124 and the inner wall of the claw part 112 are integrated, and the teeth are ring-shaped structures with openings and have cusp circles. The inner diameter of the cusp circle is matched with the outer diameter of the pipe 2, when the clamping claw part 112 is clamped, the side part of the front edge tooth of the claw tooth can bear the axial force resisting the extraction, so that the clamping and centering and clamping and anchoring effects on the pipe 2 are formed, the pipe 2 can be prevented from being extracted or loosened during laying, and the pipe can be smoothly loosened during disassembly.

Furthermore, the inner wall of the claw part 112 is provided with annular row teeth, the annular row teeth are provided with bending grooves 1125 towards the inner wall in an annular array mode, the joint part 111 comprises a threaded part 1113, and the threaded part 1113 is provided with square through holes 1114 towards the inside in an annular array mode. Specifically, the annular row teeth are separated by the bending grooves 1125, the annular row teeth 1124 are composed of a plurality of row tooth sections, the bending grooves 1125 are arranged between the row tooth sections, and the bending grooves 1125 are arranged in an annular array on the inner wall of the claw part 112. The joint portion 111 is a hollow cylindrical structure, and a threaded portion 1113 is additionally formed along the outer periphery thereof. The square through hole 1114 reduces the overall weight of the detachably connected plastic pipe fitting.

Further, the outer edge of the pipe locking piece 12 and the pipe main body 11 are provided with screwing rods 13. The twist collar 13 provides for operator convenience while also assisting the operator in applying force. The operator performs an operation of tightening the pipe locking member 12 and the pipe fitting body 11 by the static friction force between the hand and the tightening roller 13. The pipe fitting main body 11, the pipe locking piece 12 or the joint part 111 are provided with the screwing device 13, so that the pipe fitting main body and the pipe locking piece can be fastened stably when the pipe fitting 2 is connected, and can be detached simply and quickly.

In short, the invention is intended to prevent the connected pipes 2 from being pulled out or loosened from the pipe by pressure, impact and dragging movements of laying, the detachably connected plastic pipe is composed of a structure for holding the pipes 2 and has the ability to loosen the pipes 2 when disassembled. The pipe fitting has good elastic deformation capacity under the condition that the whole pipe fitting is made of plastic materials, the clamping claw part 112 for clamping the pipe 2, the joint part 111 and the pipe fitting main body 11 are combined to form an integrated structure, the detachable connection function of integrally clamping or loosening the pipe 2 is realized, the coaxiality errors of the clamped pipe 2, the sealing ring 1112 and the sealing ring groove 1111 are reduced, the compression amount of the sealing surface of the sealing ring 1112 and the pipe 2 is uniform, the pre-sealing effect of the sealing ring 1112 is enhanced, and the variety and the number of parts are reduced.

The following are various embodiments of the plastic tubing assembly 1 described above:

example one

As shown in fig. 9, 10 and 11

In the first plastic pipe assembly, the pipe body 11 is a direct structure, two ends of the pipe body 11 are respectively integrally formed with the two joint portions 111 and the claw portions 112, and the integrally formed structure sequentially includes the pipe body 11, the joint portions 111 and the claw portions 112. It is noted that the structure of the joint portion 111 and the claw portion 112 is consistent with the above description. The deformation angle of the pipe main body 11 may be any angle, for example, 90 degrees, and the number of the joint portions 111 and the claw portions 112 integrally formed with the pipe main body 11 is not limited, for example, three-way joints and four-way joints.

Example two

As shown in fig. 12:

the pipe body 11 of the second plastic pipe assembly is a head-shaped structure, and is integrally formed with the joint portion 111 and the claw portion 112, and can be used as a plug.

EXAMPLE III

As shown in fig. 13 and 14:

the pipe body 11 of the third plastic pipe assembly is internally provided with female threads or female threads, and is integrally formed with the joint portion 111 and the claw portions 112, and the formed pipe body 11 forms a certain angle, such as 45 degrees or 90 degrees, with the joint portion 111.

Example four

As shown in fig. 15 and 16:

the pipe fitting main body 11 of the fourth plastic pipe fitting assembly is integrally formed with the joint part 111 and the clamping claw part 112 at two horizontal axial ends respectively, the pipe fitting main body 11 is integrally provided with branches, and male threads or female threads are arranged in the branches and are male connecting tee joints or female connecting tee joints.

EXAMPLE five

As shown in fig. 17 and 18:

in the fifth plastic pipe assembly, the pipe body 11, the joint part 111 and the claw part 112 are integrally formed, and a female thread or an external male thread is arranged in the pipe body 11 in a diameter-changing manner, and is in diameter-changing female connection or diameter-changing male connection.

The above-described embodiments of the present invention are adaptable to different pipe 2 connection environments.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and the embodiments of the present invention may be modified or adapted in any manner.

It can thus be seen that the objects of the invention are sufficiently well-attained. The embodiment illustrated and described herein is to be considered as illustrative of the functional and structural principles of the present invention and changes may be made without departing from such principles. Accordingly, this invention includes all modifications encompassed within the scope and spirit of the following claims.

Claims

1. The detachable plastic pipe fitting comprises a pipe fitting main body (11) and a pipe locking piece (12), and is characterized in that the pipe fitting main body (11) is provided with at least one joint part (111) and at least one clamping claw part (112), the joint part (111) and the clamping claw part (112) are integrally formed with the pipe fitting main body (11), and the clamping claw part (112) is provided with a lateral tensioning opening (1121); when the pipe (2) is inserted into the pipe main body (11), the pipe locking piece (12) is tightly matched with the joint part (111) and the clamping claw part (112), so that the clamping claw part (112) can clamp the pipe (2).

2. The disconnectable plastic pipe according to claim 1, wherein the joint part (11) or the pipe body (11) is provided with at least one sealing ring groove (1111) on the inner wall, the sealing ring groove (1111) being provided with a sealing ring (1112) in a sealing fit.

3. The pipe fitting of any one of claims 1 or 2, wherein a separation groove (113) is provided between the joint portion (111) and the pawl portion (112), and opposite sides of the separation groove (113) are provided with inwardly bent grooves (114).

4. The disconnectable plastic pipe according to claim 1, wherein the outer edge of the jaw part (112) is provided with at least one glue reducing groove (1122); if the number of the glue reducing grooves (1122) is 2 or more, a convex part (1123) is formed between two adjacent glue reducing grooves (1122).

5. The disconnectable plastic pipe according to claim 1, wherein said jaws (112) are provided with a row of teeth (1124) on the inner wall.

6. The pipe fitting of claim 5, wherein the inner wall of the claw portion (112) is provided with a row of teeth (1124), the row of teeth (1124) is provided with a plurality of bending grooves (1125) along the axial direction, and the plurality of bending grooves (1125) are arranged at equal intervals along the radial direction.

7. The releasably attachable plastic pipe of claim 5 or 6 wherein said rows of teeth comprise teeth comprising a front flank, and a cusp formed by the intersection of the two, said front flank, rear flank, and cusp being of unitary construction.

8. The pipe section of claim 1 or 6, wherein the joint wall is provided with a clearance (1115).

9. The disconnectably connectable plastic pipe according to claim 1, wherein the joint part (111) comprises a threaded part (1113), the threaded part (1113) being inwardly open with a through hole (1114).

10. The detachably connectable plastic pipe according to claim 9, wherein the threaded portion (1113) is an external thread, the pipe locking member (12) is screwed with the external thread, the inner wall of the pipe locking member (12) and the outer edge of the claw portion (112) have conical surfaces, the pipe locking member (12) is screwed to wedge the claw portion (112) when connected, the end of the pipe locking member (12) in the direction of the claw has an adjustment margin (121), and the outer edge of the pipe locking member (12) and the pipe body (11) are provided with a screwing member (13).