Connecting piece for PVC (polyvinyl chloride) pipe

Abstract

The utility model discloses a connecting piece for a PVC (polyvinyl chloride) pipe, which comprises a sleeve A and a sleeve B detachably connected to the sleeve A. The outer surfaces of the sleeve A and the sleeve B are respectively in threaded connection with a locking ring, the inner walls of the sleeve A and the sleeve B are respectively provided with a sealing ring A, and a sealing ring B is arranged between the connecting surfaces of the sleeve A and the sleeve B. By adopting a mechanical connection structure, the quick connection at the fracture of the PVC pipeline is realized, and the PVC pipeline can be put into use after being connected, so that the use efficiency of the pipeline is improved; and secondly, the assembly and disassembly are convenient, and the pipeline is not damaged, so that the maintenance cost is greatly reduced, the maintenance time is greatly shortened, and the maintainability of the PVC pipeline system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to PVC pipe connecting technical field, specifically, relate to a connecting piece for PVC pipe. BACKGROUND

[0002] PVC pipe is widely used in building water supply and drainage, agricultural irrigation, industrial fluid conveying and other fields due to its excellent corrosion resistance, low cost and easy processability. But PVC pipe will inevitably leak during use due to material aging, external damage (such as impact, extrusion) or improper installation, which requires repairing the pipeline. At present, the common way is to cut off the pipeline at the leakage point and reconnect it through the pipeline connecting piece. The width between the two sides of the cut-off port of the pipeline should be less than the length of the connecting piece used. When connecting, the connecting piece is inserted into one side of the port after applying glue in the inner hole of the connecting piece, and the other end of the connecting piece is placed between the ports. Then, the connecting piece is driven to move to the other side of the pipeline, and the other end of the connecting piece is inserted into the other side of the pipeline to complete the connection. This connection method has the following defects:

[0003] 1) After connection, the PVC pipeline cannot be used for 12-24 hours to prevent the glue between the connecting piece and the pipeline from not drying, which may cause leakage and seriously affect the use efficiency (such as project progress, daily water use, etc.);

[0004] 2) If the glue connection method is used, the connecting structure may be damaged when disassembled, and there is a risk of glue aging and falling off after long-term use, which may cause the connection to leak again. UTILITY MODEL CONTENTS

[0005] In order to solve the problems existing in the prior art, the utility model aims to provide a connecting piece for PVC pipe to realize quick and stable connection of PVC pipeline and facilitate disassembly and maintenance.

[0006] To achieve the above technical purposes and effects, the utility model realizes the following technical scheme:

[0007] A connecting piece for PVC pipe includes a sleeve A and a detachable sleeve B connected to the sleeve A. The outer surfaces of the sleeve A and the sleeve B are respectively threaded with a locking ring, and the inner walls of the two are respectively provided with a sealing ring A, and a sealing ring B is arranged between the connecting surfaces of the two.

[0008] Further, the cross sections of the sleeve A and the sleeve B are both T-shaped, and the two are detachably connected together through the horizontal connecting block therebetween.

[0009] Further, the sleeve A and the sleeve B are detachably connected through the cooperation of the bolt and the nut.

[0010] Further, the connecting surface of the sleeve A is provided with a positioning groove, and the connecting surface of the sleeve B is provided with a positioning block matched with the positioning groove.

[0011] Further, the axial center line of the positioning groove coincides with the axial center line of the inner hole of the sleeve A, and the axial center line of the positioning block coincides with the axial center line of the inner hole of the sleeve B.

[0012] Further, a matching bevel is arranged between the matching surface of the positioning groove and the positioning block.

[0013] Further, a ring-shaped groove for mounting the sealing ring A is arranged on the inner wall of the sleeve A and the sleeve B.

[0014] Further, the outer surface of the locking ring is provided with anti-skid lines.

[0015] Further, the material of the sleeve A and the sleeve B is modified polypropylene, and the material of the sealing ring A and the sealing ring B is rubber.

[0016] The beneficial effects of the utility model are as follows: the utility model adopts a mechanical connection structure, realizes the quick connection of the PVC pipeline breakage, can be used after connection, thereby improving the use efficiency of the pipeline; secondly, the utility model is convenient to disassemble and assemble, and will not damage the pipeline, thereby greatly reducing the maintenance cost and time, and improving the maintainability of the PVC pipeline system.

[0017] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the content of the specification can be implemented, the following preferred embodiments of the utility model and the accompanying drawings are described in detail. The specific implementation of the utility model is given in detail by the following embodiments and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings described herein are used to provide further understanding of the utility model, constitute a part of the present application, and the schematic embodiments of the utility model and the description are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0019] Figure 1 It is the overall structure schematic view of the utility model connecting piece;

[0020] Figure 2 It is the top view of the utility model connecting piece;

[0021] Figure 3 The utility model discloses Figure 2 The sectional view at A-A;

[0022] Figure 4 The utility model discloses sleeve sectional view;

[0023] Figure 5 The utility model discloses connection schematic view;

[0024] Figure 6 The utility model discloses connection sectional view.

[0025] Mark explanation in drawing:1, sleeve A;2, sleeve B;3, locking ring;4, sealing ring A;5, sealing ring B;6, bolt;7, nut;11, positioning groove;21, positioning block;31, antiskid line;102, annular groove. Specific implementation

[0026] The utility model will be described in detail below in combination with the embodiment and with reference to the drawings.

[0027] It needs to be explained that all directionality instructions (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) in the embodiment of the utility model are only used for explaining the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality instructions also change accordingly.

[0028] Referring to Figures 1-3 As shown in the figure, a PVC pipe connecting piece, including sleeve A1 and detachable sleeve B2 connected on sleeve A1, the outer surface of sleeve A1 and sleeve B2 is respectively threaded with a locking ring 3, and a sealing ring A4 and a sealing ring B5 are respectively arranged on the inner wall of sleeve A1 and sleeve B2, and the connecting surface of the two is provided with a sealing ring B5; wherein, in the embodiment, sleeve A1 and sleeve B2 are made of high-strength, corrosion-resistant modified polypropylene; and the material of sealing ring A4 and sealing ring B5 is rubber, preferably silicone rubber or nitrile rubber.

[0029] Further, referring to Figures 3-4 As shown in the figure, in the embodiment, the cross section of sleeve A1 and sleeve B2 is T-shaped; when connecting, the transverse connecting blocks of sleeve A1 and sleeve B2 are detachably connected together through the cooperation of bolt 6 and nut 7; wherein, in the embodiment, nut 7 is directly embedded in the transverse connecting block of sleeve A1.

[0030] Further, continue to refer to Figures 3-4As shown, in the embodiment, a positioning groove 11 is formed on the connecting surface of the sleeve A1, and the axial center line of the positioning groove 11 coincides with the axial center line of the inner hole of the sleeve A1; a positioning block 21 adapted to the positioning groove 11 is formed on the connecting surface of the sleeve B2, and the axial center line of the positioning block 21 coincides with the axial center line of the inner hole of the sleeve B2; when connected, the relative position of the sleeve A1 and the sleeve B2 can be quickly and accurately determined through the cooperation of the positioning groove 11 and the positioning block 21, the difficulty of connection caused by position deviation is avoided, and the efficiency and accuracy of connection are greatly improved; wherein, in the embodiment, when the sleeve A1 and the sleeve B2 are connected, the sealing ring B5 is placed in the positioning groove 11 and is pressed between the upper surface of the positioning block 21 and the groove bottom of the positioning groove 11, and leakage at the connection between the positioning groove 11 and the positioning block 21 can be effectively avoided through the sealing ring B5.

[0031] Further, in the embodiment, a matching inclined angle is arranged between the matching surfaces of the positioning groove 11 and the positioning block 21, and the inclined angle is helpful to guide the positioning block 21 to smoothly slide into the positioning groove 11 in the assembly process, so as to reduce the assembly difficulty, avoid component damage caused by forced assembly, and improve the assembly efficiency and product quality.

[0032] Further, referring to Figures 3-4 As shown, in the embodiment, a ring-shaped groove 102 is formed on the inner wall of the sleeve A1 and the sleeve B2 respectively, and the sealing ring A4 is installed on the inner wall of the sleeve A1 or the sleeve B2 through the ring-shaped groove 102; wherein, when the sealing ring A4 is installed, the sealing ring A4 protrudes from the inner wall of the sleeve A1 or the sleeve B2.

[0033] Further, referring to Figure 3 As shown, in the embodiment, anti-skid lines 31 are formed on the outer surface of the locking ring 3, and the anti-skid lines 31 are convenient for disassembly and assembly of the locking ring 3.

[0034] The installation process of the utility model is as follows:

[0035] When installed, referring to Figures 5-6As shown (in the figure, the label A represents the port two sides of the pipeline; in the figure, the label B represents the connector), first, the locking ring 3 is sleeved on both sides of the pipeline, then the sleeve B1 is sleeved into one side of the pipeline, and the same side locking ring 3 is screwed onto the sleeve B1, so that the sleeve B1 cannot move on the sleeved pipeline, at this time, the front end of the pipeline protrudes from the front end of the sleeve B1; then the sleeve A1 is sleeved into the other side of the pipeline, and the same side locking ring 3 is screwed onto the sleeve A1 and tightened, then the sealing ring B5 is placed in the positioning groove 11, at this time, the sealing ring A4 installed in the sleeve A1 is pressed between the sleeve A1 and the pipeline, thereby effectively avoiding leakage between the sleeve A1 and the pipeline; then loosen the locking ring 3 on the side of the sleeve B1, so that the sleeve B1 can move on the pipeline; then the sleeve B1 is moved towards the sleeve A1, so that the positioning block 21 penetrates into the positioning groove 11, and the sleeve B1 is adjusted by rotating, so that the sleeve B1 and the sleeve A1 are aligned, then the bolt 6 is inserted into the nut 7 embedded in the sleeve A1 from the sleeve B1 and tightened; then the locking ring 3 on the same side of the pipeline as the sleeve B1 is tightened, that is, the connection is completed, at this time, the sealing ring A4 installed in the sleeve B1 is pressed between the sleeve B1 and the pipeline, thereby effectively avoiding leakage between the sleeve B1 and the pipeline.

[0036] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coupling for PVC pipe, characterized by: The sleeve A (1) and the detachable sleeve B (2) connected on the sleeve A (1), the outer surface of the sleeve A (1) and the sleeve B (2) are respectively threaded with a locking ring (3), and the inner wall of the two is respectively provided with a sealing ring A (4), and a sealing ring B (5) is arranged between the connecting surfaces of the two.

2. The coupling for PVC pipe according to claim 1, characterized in that: The cross section of the sleeve A (1) and the sleeve B (2) is T-shaped, and the two are detachably connected through the transverse connecting blocks.

3. The coupling for PVC pipe according to claim 2, wherein: The sleeve A (1) and the sleeve B (2) are detachably connected through the cooperation of the bolts (6) and the nuts (7).

4. The coupling for PVC pipe according to claim 3, characterized in that: The connecting surface of the sleeve A (1) is provided with a positioning groove (11), and the connecting surface of the sleeve B (2) is provided with a positioning block (21) matched with the positioning groove (11).

5. The coupling for PVC pipe according to claim 4, wherein: The axial center line of the positioning groove (11) coincides with the axial center line of the inner hole of the sleeve A (1); and the axial center line of the positioning block (21) coincides with the axial center line of the inner hole of the sleeve B (2).

6. The coupling for PVC pipe according to claim 5, characterized in that: The matching inclined angle is arranged between the matching surfaces of the positioning groove (11) and the positioning block (21).

7. The coupling for PVC pipe according to claim 1, wherein: The inner wall of the sleeve A (1) and the sleeve B (2) is respectively provided with a ring-shaped groove (102) for installing the sealing ring A (4).

8. The coupling for PVC pipe according to claim 1, wherein: The outer surface of the locking ring (3) is provided with anti-skid lines (31).

9. The coupling for PVC pipe according to any one of claims 1 to 8, characterized in that: The material of the sleeve A (1) and the sleeve B (2) is modified polypropylene; the material of the sealing ring A (4) and the sealing ring B (5) is rubber.

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