CN114962840B

CN114962840B - Pipeline connecting device

Info

Publication number: CN114962840B
Application number: CN202210641836.4A
Authority: CN
Inventors: 周继霞
Original assignee: Beijing Xinrong Detong Technology Co ltd
Current assignee: Beijing Xinrong Detong Technology Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2024-02-09
Anticipated expiration: 2042-06-08
Also published as: CN114962840A

Abstract

The invention discloses a pipeline connecting device, which is used for connecting a first pipeline with a second pipeline, and comprises an upper connecting pipe, a lower connecting pipe and a cold shrink pipe, wherein the upper end of the upper connecting pipe is used for being connected with the lower end of the first pipeline in a sealing way, and the inner diameter and the outer diameter of the lower end are contracted inwards to form a first step part; the lower connecting pipe is sleeved on the outer side of the lower end of the upper connecting pipe, and the end face of the upper end of the lower connecting pipe abuts against the first step part of the upper connecting pipe; and the outer diameter of the lower end of the lower connecting pipe is contracted inwards to form a second step; the lower connecting pipe is used for being inserted into the upper end of the second pipeline, and the second step part is propped against the end face of the upper end of the second pipeline; the cold shrink tube is used for wrapping a first joint between the upper end face of the lower connecting tube and the first step part and a second joint between the second step part and the upper end face of the second pipeline. The invention has the advantages of convenient installation and instant assembly and use. And the sealing performance and the stability of the connecting part are both increased due to the independent self-sealing structure.

Description

Pipeline connecting device

Technical Field

The invention belongs to the technical field of pipelines, and particularly relates to a pipeline connecting device which can be generally applied to connection of sewer pipelines of kitchens and toilets, but can also be applied to various application occasions requiring connection of two pipelines. The invention has no limitation on liquid or solid-liquid mixture flowing in the pipeline, no limitation on the temperature of substances in the pipeline, and application in water-based or oil-based environment.

Background

In daily life or industrial production, it is often necessary to connect two pipes together. For example, for a kitchen sink, the sewer pipe needs to be connected to the reserved portion of the sewer pipe of the building. The building downcomer is a hard pipe fitting, the pipe diameter is thicker, the downcomer of the kitchen pool is a flexible pipe fitting, the pipe diameter is thinner, the pool downcomer can be directly inserted into the building downcomer, however, the simple connection lacks the tightness, the odor is easy to return, and if the sewer is blocked, the sewer is likely to return.

For sealing, a sealing tape is often used for winding the joint or a sealing ring is used for sleeving, however, the sealing performance of the two modes is not strong, and the connection is not stable enough. When the pressure in the sewer pipe suddenly increases, the joint is easily broken, and serious consequences are caused. In particular, more and more households now install kitchen waste crushers under the sink, which when the crushers are discharged downwards will cause a large pressure in the pipeline, which is difficult to withstand for a long time for the one-place sealing tape and sealing ring.

For this reason, special pipe connectors have been proposed by the industry to improve the tightness of the pipe connection. For example, fig. 1 shows a plastic sewer pipe joint proposed in chinese patent publication CN2749964Y, which is used for connecting a first pipe a and a second pipe B, the main body of the joint is of an integrated structure, one end of the joint is configured to facilitate the pipe end to extend into or be sleeved into a tightly adhered connection, the other end is configured to have a shoulder shape, and a sealing ring is embedded in a groove of an inner wall of the shoulder.

However, in order to connect with a reserved portion of a sewer of a building when the conventional pipe joint is installed, since the reserved portion has no connection structure such as a screw, it is necessary to apply an adhesive to the outside or inside of the lower end of the pipe joint. The coating process is complicated and the adhesive needs to undergo a curing process for one or two days, which makes the installation process of the pipe joint complicated and impossible to use immediately.

Disclosure of Invention

First, the technical problem to be solved

On one hand, the invention aims to solve the problems that the existing pipeline connection mode is not stable enough and is easy to crack when the pressure is high; on the other hand, the invention aims to solve the problems that the existing pipe joint structure is inconvenient to install and can not be assembled and used at once.

(II) technical scheme

In order to solve at least one of the above problems, the present invention provides a pipe connection device for connecting a first pipe with a second pipe, comprising an upper connection pipe, a lower connection pipe and a cold shrink pipe, wherein,

the upper end of the upper connecting pipe is used for being connected with the lower end of the first pipeline in a sealing way, and the inner diameter and the outer diameter of the lower end are contracted inwards to form a first step part;

the lower connecting pipe is sleeved on the outer side of the lower end of the upper connecting pipe, and the end face of the upper end of the lower connecting pipe abuts against the first step part of the upper connecting pipe; and the outer diameter of the lower end of the lower connecting pipe is contracted inwards to form a second step;

the lower connecting pipe is used for being inserted into the upper end of the second pipeline, and the second step is used for propping against the end face of the upper end of the second pipeline;

the cold shrink tube is used for wrapping a first joint between the upper end face of the lower connecting tube and the first step part, and a second joint between the second step part and the upper end face of the second pipeline.

According to a preferred embodiment of the invention, the first seam is flush with the outside of the part at the second seam.

According to a preferred embodiment of the invention, the inner radial constriction of the lower end of the upper nipple is a ramp.

According to a preferred embodiment of the invention, the ramp is provided with spiral-shaped flow guiding grooves or ribs.

According to a preferred embodiment of the invention, the down tube is a self-sealing tube.

According to a preferred embodiment of the invention, the upper adapter is a rigid tube.

According to a preferred embodiment of the present invention, the length of the portion of the down tube for inserting the second pipe is 3-8 cm.

According to a preferred embodiment of the present invention, the cold shrink tube is an elastic cold shrink tube.

According to a preferred embodiment of the present invention, the length of the cold shrink tube is 4-10 cm.

According to a preferred embodiment of the invention, the cold shrink tube further comprises a clamp which is sleeved on the outer side of the cold shrink tube.

(III) beneficial effects

The pipeline connecting device adopts the elastic cold shrink pipe, does not need an adhesive during installation, and has the advantages of convenient installation and instant use.

The pipe connecting device has an independent self-sealing structure, so that the tightness and the stability of the connecting part are improved, and the pipe connecting device cannot be cracked or damaged when the pressure in the pipe is suddenly increased.

Drawings

FIG. 1 is a schematic view of a prior art plastic sewer pipe joint;

FIG. 2 is a schematic cross-sectional view of a pipe connection device according to a first embodiment of the present invention;

fig. 3A and 3B are schematic views illustrating an installation process of a pipe connection device according to a first embodiment of the present invention;

fig. 4 is a schematic view of a spiral-shaped flow guide groove provided at a slope of an upper nozzle of an embodiment of the pipe connection device of the present invention.

FIG. 5 is a schematic view of the water-swellable direction of the lower nozzle of the pipe connection device of the present invention.

Fig. 6 is a schematic cross-sectional view of a pipe connection device according to a second embodiment of the present invention.

Detailed Description

In order to solve the problems that the existing pipe joint structure is inconvenient to install and can not be assembled and used at once, the invention adopts an elastic cold shrink pipe self-sealing structure. Specifically, the pipeline connecting device comprises an upper connecting pipe, a lower connecting pipe and a cold shrink pipe, wherein the upper connecting pipe is used for connecting a first pipeline, the lower connecting pipe is used for connecting a second pipeline, and the cold shrink pipe is sleeved between the upper connecting pipe and the lower connecting pipe. The cold shrink tube is an elastic cold shrink tube, can be conveniently sleeved on the upper connecting tube and the lower connecting tube and generates enough internal pressure, so that the cold shrink tube is convenient to install while the effective sealing effect is carried out on the joint, and the purpose of instant assembly and instant use can be achieved without using an adhesive.

In addition, in order to further increase the stability of the pipe connection portion, the lower adapter tube of the present invention is a separate member that is mated with the upper adapter tube and has a self-sealing function. The self-sealing function can automatically squeeze air at the joint of all the components and can generate certain pressure at the joint of the components, so that the connection strength of the joint can be further increased, and the stability of the pipeline connection is improved.

The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.

Fig. 2 is a schematic structural view of a first embodiment of the pipe connection device of the present invention. As shown in fig. 2, the pipe connection device includes an upper adapter pipe 1 and a lower adapter pipe 2. The upper connecting pipe 1 is connected with the first pipeline A, and the lower pressing pipe 2 is connected with the second pipeline B. In this embodiment, the first conduit a is a sewer pipe of a kitchen or toilet sink, which is typically a hose, but has a rigid fitting. The second pipe B is a reserved portion of the sewer pipe in a kitchen or toilet, typically a rigid PVC pipe.

As shown in fig. 2, the upper end of the upper adapter tube 1 has external threads, which are matched with the internal threads of the lower end of the first pipe a, so that connection can be conveniently performed. For sealing, a sealing ring may be provided at the upper end of the upper adapter tube 1 for sealing.

The lower half of the upper adapter tube 1 is contracted inwardly in both inner and outer diameters to form a first step 11. The lower end of the first step 11 is adapted to abut against the upper end of the lower adapter 2. The lower connecting pipe 2 is sleeved on the outer side of the lower end of the upper connecting pipe 1, and the end face of the upper end of the lower connecting pipe 2 abuts against the first step part 11 of the upper connecting pipe 1. And the outer diameter of the lower end of the down tube also contracts inwardly to form a second step 21. The second step 21 is used for propping against the upper end face of the second pipeline B.

The lower end portion of the lower adapter tube 2 is inserted into the upper end of the second pipe B. The portion inserted into the second pipe B should have a certain length, but there is no limitation on a specific length value, and for example, it may be preferable to have a length of 3 to 8cm. If the length is too small, the contact surface may be too small, thereby affecting sealability and structural stability.

In this embodiment, the pipe connection device further comprises a cold shrink pipe 3. The cold shrink tube 3 is located at the outer side between the upper connecting tube 1 and the lower connecting tube 2, and wraps a first joint between the upper end face of the lower connecting tube 2 and the first step 11, and a second joint between the second step 21 and the upper end face of the second pipeline B. Preferably, the first seam is flush with the outside of the part at the second seam to further facilitate installation and maintain tightness.

The cold shrink tube generally refers to a tubular cable accessory adopting a cold shrink technology, and has the functions of insulation, sealing, protection and the like. Cold-shrink technology is also known as pre-expansion technology because it is shrunk by elastic retractive force at normal temperature, rather than heat-shrinking like heat-shrinkable materials, and is commonly known as cold-shrink technology. Materials commonly used for cold shrink tubes are silicone rubber and ethylene propylene rubber. The cold shrinkage tube has the advantages of small volume, convenient and rapid operation, no need of special tools, wide application range, few product specifications and the like. Compared with a heat-shrinkable product, the heat-shrinkable product does not need to be heated by a tool, can be tightly sealed under the conditions of heat expansion and cold contraction, and can not generate gaps due to heat expansion and cold contraction. Cold shrink tubes are often ideal sealing materials for cables, coaxial cables, medium and low voltage power cables, but are not seen for connecting pipes. When the conventional pipe fitting cannot realize sealed and stable pipeline connection, the inventor of the invention develops a new way to adopt the cold shrink pipe as a peripheral sealing and reinforcing device of the pipeline connecting device, so that the problems of tightness and stability are solved, and the installation is particularly convenient.

Fig. 3A and 3B are schematic views of an installation process of a pipe connection device according to a first embodiment of the present invention. When the first pipe a is to be connected to the second pipe B, as shown in fig. 3A, the upper end of the first embodiment of the present invention, that is, the upper end of the upper adapter tube 1 is sealed and connected to the connection end of the lower end of the first pipe a by screwing. In this embodiment, the upper adapter 1 is externally threaded, and the end of the first pipe a is internally threaded, but the present invention is not limited to the connection manner of the upper adapter 1. For example, the inner diameter of the upper connecting pipe 1 may be larger than the inner diameter of the lower end of the first pipe a, the upper connecting pipe 1 is provided with an internal thread, and the lower end of the first pipe a is provided with an external thread.

As shown in fig. 3A, the original position of the cold shrink tube 3 of the tube connecting device of the first embodiment is in the inside-out mode, which can be set to such a mode at the time of shipment. And the shrink tube 3 is sleeved on the outer peripheral sides of the upper connecting tube 1 and the lower connecting tube, and wraps the upper connecting tube 1 and the lower connecting tube 2. Next, as shown in fig. 3B, since the first pipe a is a flexible pipe, it can be telescopically bent so as to be guided to the second pipe B. At this time, the down tube 2 can be inserted into the second pipe B, and since the outer diameter of the second pipe is set to be standard in advance, and is matched with the inner diameter of the reserved portion of the building sewer pipe, the down tube 2 can achieve better abutment after being inserted into the second pipe B. In addition, since the upper end of the down tube 2 has the second step 21, the second step 21 is just propped against the upper end of the reserved portion of the second pipeline B after moving a certain distance in the direction of the second pipeline B. Then, the everting portion of the lower end of the cold shrinkable tube 3 is pushed downward so as to tightly wrap the joint portion of the second pipe B, thereby completing the installation of the pipe connecting device of the first embodiment. It should be noted that the cold shrink tube 3 should have a sufficient length, but the length is not limited, and may be preferably 4-10 cm, for example, so as to achieve a large overall shrinkage force after installation and maintain a sealed state.

Preferably, the cold shrink tube is made of a hydrophobic or oleophobic rubber material to increase the water or oil repellent effect.

The installation mode shows that the pipeline connecting device is very convenient to install, no adhesive is needed, the construction time is shortened, and the pipeline connecting device can be assembled and used. And, due to the contractibility of the cold shrink tube 3 itself, it can generate a large pressure of the inner contraction to maintain the connection strength between the connection device and the second pipe.

Further, returning again to FIG. 2, in this embodiment, the lower end of the upper nipple has a slope 12 at its inner radial inward extent. Due to the slope 12, the liquid or solid-liquid mixture flowing from the first pipe a to the second pipe B is not easily blocked at the turning point inside the pipe, i.e. the slope 12 plays a role of guiding flow.

As a preferred embodiment of the present invention, the slope 12 is provided with spiral diversion grooves or edges to promote the flow of the liquid or solid-liquid mixture in the pipeline and prevent the liquid or solid-liquid mixture from being retained. Fig. 4 shows a schematic view of spiral-shaped channels, and it can be seen from the figure that the channels 13 are uniformly distributed on the slope and have a counterclockwise spiral shape. The spiral direction of the spiral shape can be changed according to the geographic position of the application environment, the northern hemisphere is in a anticlockwise spiral shape, and the southern hemisphere is in a clockwise spiral shape so that the direction of rotation of the liquid naturally flows downwards.

As a particularly preferred embodiment of the invention, the down tube 2 is a self-sealing tube of self-sealing material. In particular, the downpipe may be a water-swellable tube or an oil-swellable tube. For example, when the pipe connection device is used to connect water pipes, it may be composed of water-swellable rubber. The water-swelling rubber is prepared from water-soluble polyurethane prepolymer, water-absorbing materials such as sodium acrylate high-molecular water-absorbing resin and synthetic rubber such as natural rubber and chloroprene rubber. In order to be matched with the rubber which is water-swelling, the lower connecting pipe is a hard pipe fitting.

FIG. 5 is a schematic view of the water-swellable direction of the lower nozzle of the pipe connection device of the present invention. As shown in fig. 4, when the lower adapter tube 2 is water-swellable, it can squeeze out the air in the first and second gaps and apply a pushing force to the outer parts thereof, thereby forming a tightly-connected and tightly-sealed sealing structure.

Fig. 6 is a schematic cross-sectional view of a pipe connection device according to a second embodiment of the present invention. As shown in fig. 6, unlike the first embodiment, the pipe connection device of this embodiment further includes a clip which is sleeved on the outer side of the cold shrink pipe so as to further enhance the connection stability between pipes. The clip may take any form known in the art, such as a metal clip for a screw-nut connection to the connector portion, or a disposable band made of hard plastic.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the invention thereto, but to limit the invention thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the invention.

Claims

1. A pipeline connecting device is used for connecting a first pipeline with a second pipeline and is characterized by comprising an upper connecting pipe, a lower connecting pipe and a cold shrink pipe, wherein,

2. The pipe coupling according to claim 1, wherein said first seam is flush with the outside of the part at the second seam.

3. The pipe coupling according to claim 1, wherein the inner radial constriction of the lower end of said upper nipple is a ramp.

4. A pipe connection according to claim 3, wherein the ramp is provided with a spiral-shaped flow guide groove or rib.

5. The plumbing connection of claim 1, wherein said down tube is a self-sealing tube.

6. The pipe coupling according to claim 5, wherein said upper adapter is a rigid pipe.

7. The pipe connection device according to claim 1, wherein the length of the portion of the down tube for inserting the second pipe is 3 to 8cm.

8. The pipe connection device of claim 1, wherein the cold shrink tube is an elastic cold shrink tube.

9. The pipe connection device of claim 7, wherein the length of the cold shrink pipe is 4-10 cm.

10. The pipe coupling according to claim 1, further comprising a clip that is sleeved on the outside of the cold shrink pipe.