CN114962840A

CN114962840A - Pipeline connecting device

Info

Publication number: CN114962840A
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: 2022-08-30
Anticipated expiration: 2042-06-08
Also published as: CN114962840B

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 hermetically connected with the lower end of the first pipeline, and the inner diameter and the outer diameter of the lower end both contract inwards to form a first step part; the lower connecting pipe is sleeved outside the lower end of the upper connecting pipe, and the upper end face of the lower connecting pipe abuts against the first step part of the upper connecting pipe; and the lower end of the lower connecting pipe contracts inwards in the radial direction to form a second step part; the lower connecting pipe is inserted into the upper end of the second pipeline and abuts against the upper end face of the second pipeline by using the second step part; the cold shrink tube is used for wrapping a first seam between the upper end face of the lower connecting tube and the first step and a second seam between the second step and the upper end face of the second tube end. The invention has the advantages of convenient installation and instant use. And the sealing performance and the stability of the connecting part are improved 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 the connection of sewer pipelines of kitchens and toilets, but also can be generally applied to various application occasions needing to connect two pipelines. The invention has no limit to the liquid or solid-liquid mixture flowing through the pipeline, has no limit to the temperature of the substances in the pipeline, and can be applied to water-based or oil-based environments.

Background

In daily life or industrial production, it is often necessary to connect two pipes together. For example, for kitchen sinks, the sewer pipe needs to be connected to a reserved part of the sewer pipe of the building. The sewer pipe of the building is a hard pipe fitting, the pipe diameter is thick, the sewer pipe of the kitchen pool is a flexible pipe fitting, the pipe diameter is thin, the sewer pipe of the pool can be directly inserted into the sewer pipe of the building, however, the simple connection is lack of tightness and is easy to return odor, and if the sewer is blocked, water can return.

For sealing, a sealing tape is often used to wind the joint or a sealing ring is used to sleeve, but both methods have poor sealing performance and the connection is not stable enough. When the pressure in the sewer pipe is suddenly increased, the joint is easily burst open, and serious consequences are caused. In particular, more and more households now have kitchen waste crushers installed under the sink, which when discharging sewage downwards will generate a large pressure in the pipe, which is difficult to withstand for a long time by sealing the adhesive tape and the sealing ring together.

For this reason, manufacturers have proposed special pipe joints to improve the sealing performance of the pipe joints. For example, fig. 1 shows a plastic sewer pipe joint proposed by chinese patent publication No. CN2749964Y, which is used to connect a first pipe a and a second pipe B, and the joint has a main body portion of an integrated structure, one end of the joint is configured to be inserted into or sleeved into the pipe end portion for tight bonding connection, the other end is configured to have a shoulder shape, and a sealing ring is embedded in an inner wall groove of the shoulder.

However, in order to connect the conventional pipe joint to a reserved portion of a sewer of a building during installation, since the reserved portion does not have a connection structure such as a screw, an adhesive needs to be applied to the outer side or the inner side of the lower end of the pipe joint. Since the coating process is cumbersome and the adhesive needs to go through a curing process of one or two days, the fitting process of the pipe joint is complicated and cannot be used immediately.

Disclosure of Invention

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 under high pressure; the invention also aims to solve the problem that the existing pipe joint structure is inconvenient to install and cannot be installed and used immediately.

(II) technical scheme

In order to solve at least one of the above problems, the present invention provides a pipe connecting device for connecting a first pipe to a second pipe, comprising 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 hermetically connected to the lower end of the first pipe, and the inner diameter and the outer diameter of the lower end both contract inwards to form a first step; the lower connecting pipe is sleeved outside the lower end of the upper connecting pipe, and the upper end face of the lower connecting pipe abuts against the first step part of the upper connecting pipe; and the lower end of the lower connecting pipe contracts inwards in the radial direction to form a second step part; the lower connecting pipe is inserted into the upper end of the second pipeline and abuts against the end face of the upper end of the second pipeline by using the second step part;

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

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

According to a preferred embodiment of the present invention, the inner diameter of the lower end of the upper pipe member is tapered inwardly.

According to a preferred embodiment of the present invention, the slope is provided with a spiral-shaped flow guide groove or flow guide ridge.

According to a preferred embodiment of the present invention, the lower adapter is a self-sealing tube.

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

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

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

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

According to the preferred embodiment of the present invention, the cold shrink tube further comprises a clamp which is sleeved outside the cold shrink tube.

(III) advantageous effects

The pipeline connecting device adopts the elastic cold shrinkage pipe, does not need a bonding agent during installation, and has the advantages of convenient installation and instant use after installation.

The pipeline connecting device has an independent self-sealing structure, so that the sealing property and the stability of the connecting part are improved, and the pipeline connecting device cannot crack or be damaged when the pressure in the pipeline suddenly increases.

Drawings

Fig. 1 is a schematic structural view of a conventional plastic sewer pipe joint;

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

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

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

FIG. 5 is a schematic view of the direction of water-swell of the lower tube of the pipe coupling of the present invention.

Fig. 6 is a sectional view schematically showing a pipe connecting 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 cannot be used immediately, the invention adopts an elastic cold-shrink pipe self-sealing structure. Specifically, the pipe connecting device provided by the invention 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 elasticity cold shrink tube, and it can conveniently cup joint on last takeover and lower takeover to produce sufficient internal pressure, thereby, when carrying out effectual sealed effect to the interface department, still be convenient for install, need not to use the binder, consequently can reach the purpose of dress usefulness promptly.

In addition, in order to further increase the stability of the pipeline connecting part, the lower connecting pipe is a separate part matched with the upper connecting pipe and has a self-sealing function. The self-sealing function can automatically extrude the air at the joint of each component, and can enable the component to generate certain pressure, so that the connection strength of the joint can be further increased, and the stability of pipeline connection is improved.

In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.

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 a first pipeline A, and the lower pressing pipe 2 is connected with a second pipeline B. In this embodiment, the first pipe a is a sewer pipe of a kitchen or toilet sink, which is typically a hose, but has a rigid joint. The second pipe B is a reserved part of a sewer pipe in a kitchen or a toilet, and is generally a hard PVC pipe.

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

The lower half of the upper adapter 1 has an inner diameter and an outer diameter both converging inward to form a first step 11. The lower end of the first step 11 is used to abut against the upper end of the lower adapter 2. The lower connecting pipe 2 is sleeved outside the lower end of the upper connecting pipe 1, and the upper end face of the lower connecting pipe 2 abuts against the first step 11 of the upper connecting pipe 1. And, the outer diameter of the lower end of the lower joint pipe is also inwardly contracted to form a second step 21. The second step portion 21 is used for abutting against the upper end surface of the second pipeline B.

The lower end portion of the lower adapter tube 2 is for inserting 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 to a specific length value, and for example, it may preferably have a length of 3 to 8 cm. If the length is too small, the contact surface may be too small, which may affect the sealing and structural stability.

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

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. The cold contraction technique is also called a pre-expansion technique because it contracts by an elastic retractive force at normal temperature, rather than by heating as in the case of a heat shrinkable material, and is commonly called a cold contraction technique. Common materials for the cold shrink tube include silicone rubber and ethylene propylene rubber. The cold-shrink tube has the advantages of small volume, convenient and rapid operation, no need of special tools, wide application range, less product specification and the like. Compared with a thermal contraction type product, the sealing device does not need to be heated by a tool, can be tightly sealed under the condition of expansion with heat and contraction with cold, and cannot generate gaps due to expansion with heat and contraction with cold. Cold shrink tubing is generally an ideal sealing material for cables, coaxial cables, and medium and low voltage power cables, but has not been used to connect pipes. When the conventional pipe fitting cannot realize sealed and stable pipe connection, the inventor of the invention develops a new way, and the cold shrink pipe is used as a peripheral sealing and reinforcing device of the pipe connection device, so that the problems of sealing performance and stability are solved, and the installation is particularly convenient.

Fig. 3A and 3B are schematic views illustrating an installation process of the pipe connection device according to the first embodiment of the present invention. As shown in fig. 3A, when the first pipe a is connected to the second pipe B, the upper end of the first embodiment of the present invention, i.e., the upper end of the upper adapter 1, is first hermetically connected to the connection end of the lower end of the first pipe a by screwing. In this embodiment, the upper adapter 1 is an external thread and the end of the first pipe a is an internal thread, but the present invention is not limited to the connection manner of the upper adapter 1. For example, the inner diameter of the upper connection pipe 1 may be larger than the inner diameter of the lower end of the first pipeline a, the upper connection pipe 1 is provided with an internal thread, and the lower end of the first pipeline a is provided with an external thread.

As shown in fig. 3A, the original position of the cold shrink tube 3 of the pipe connection apparatus of the first embodiment is a inside-out mode, which can be set to such a mode at the time of factory shipment. And the cold-shrink tube 3 is sleeved on the peripheral sides of the upper connecting tube 1 and the lower connecting tube to wrap the upper connecting tube 1 and the lower connecting tube 2. Next, as shown in fig. B, since the first pipe a is a flexible pipe, it can be further bent in a telescopic manner, and guided to the second pipe B. At this time, the lower connecting pipe 2 can be inserted into the second pipeline B, and the outer diameter of the second pipeline is set to be a standard size in advance and matched with the inner diameter of the reserved part of the building sewer pipeline, so that the lower connecting pipe 2 can be well abutted after being inserted into the second pipeline B. In addition, since the upper end of the lower connection pipe 2 has the second step portion 21, after the second step portion 21 moves a certain distance towards the second pipeline B, it is just against the upper end of the reserved portion of the second pipeline B. Next, the inside-out portion of the lower end of the cold shrinkable tube 3 is pushed down to tightly wrap the joint portion of the second pipe B, thereby completing the installation of the pipe connection 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 preferably be 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-proof or oil-proof effect.

As seen from the installation mode, the pipeline connecting device is very convenient to install, does not need any adhesive, reduces the construction time, and can be installed and used immediately. And, due to the contractibility of the cold-shrink tube 3 itself, it is possible to generate a large pressure of contraction inside to maintain the connection strength between the connection device and the second pipe.

In addition, returning to FIG. 2, in this embodiment, the inner diameter of the lower end of the upper tubular member tapers inwardly to a ramp 12. Due to the slope 12, the liquid or solid-liquid mixture flowing from the first pipeline A to the second pipeline B is not easy to be blocked at the turning part in the pipeline, namely, the slope 12 plays a role in guiding the flow.

In a preferred embodiment of the present invention, the slope 12 is provided with a spiral-shaped flow guide groove or a spiral-shaped flow guide ridge to further promote the flow of the liquid or the solid-liquid mixture in the pipeline, so that the liquid or the solid-liquid mixture is less likely to be retained. Fig. 4 shows a schematic view of a spiral-shaped flow guide channel, from which it can be seen that the flow guide channels 13 are evenly distributed on the slope and have a counterclockwise spiral shape. The spiral direction of the spiral shape can be changed according to the geographical position of the application environment, the northern hemisphere is set to be a counterclockwise spiral shape, and the southern hemisphere is set to be a clockwise spiral shape, so that the spiral direction is consistent with the rotation direction of the liquid flowing down naturally.

In a particularly preferred embodiment of the present invention, the lower adapter 2 is a self-sealing tube made of a self-sealing material. Specifically, the lower coupling tube may be a water-swellable tube or an oil-swellable tube. For example, when the tube coupling device is used to connect water tubes, it may be composed of a water-swellable rubber. The water-swellable waterproof rubber is prepared from water-absorbent materials such as water-soluble polyurethane prepolymer and sodium acrylate high-molecular water-absorbent resin, and synthetic rubbers such as natural rubber and chloroprene rubber. In order to be matched with the water-swelling rubber, the lower connecting pipe is a hard pipe fitting.

FIG. 5 is a schematic view of the direction of water-swell of the lower tube of the pipe coupling of the present invention. When the lower connecting pipe 2 meets water, as shown in fig. 4, due to its water swelling property, it can push out air in the first gap and the second gap and apply an abutting force to the components outside, thereby forming a tightly connected and sealed sealing structure.

Fig. 6 is a schematic sectional view of a pipe connecting device according to a second embodiment of the present invention. As shown in fig. 6, when different from the first embodiment, the pipe connecting apparatus of this embodiment further includes a clamp which is sleeved outside the cold shrink pipe so as to further enhance the connection stability between the pipes. The clamp may be any type of clamp known in the art, such as a metal clamp attached to the connector portion by screws and nuts, or a disposable tie made of hard plastic, etc.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present 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 shrinkage 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 mode, and the inner diameter and the outer diameter of the lower end of the upper connecting pipe both contract inwards to form a first step part;

the lower connecting pipe is sleeved outside the lower end of the upper connecting pipe, and the upper end face of the lower connecting pipe abuts against the first step part of the upper connecting pipe; and the lower end of the lower connecting pipe contracts inwards in the radial direction to form a second step part;

the lower connecting pipe is inserted into the upper end of the second pipeline and abuts against the end face of the upper end of the second pipeline by using the second step part;

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

3. The pipe coupling according to claim 1, wherein the inner diameter of the lower end of the upper pipe member is tapered inwardly.

4. A pipe coupling according to claim 3, wherein the ramp is provided with helically shaped channels or ribs.

5. The conduit connection apparatus of claim 1, wherein the lower nipple is a self-sealing tubing.

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

7. The pipe connecting device according to claim 1, wherein the length of the portion of the lower adapter for inserting the second pipe is 3 to 8 cm.

8. The pipe coupling according to claim 1, wherein said cold shrink tube is an elastic cold shrink tube.

9. The pipe coupling according to claim 7, wherein the length of the cold shrink tube is 4 to 10 cm.

10. The pipe connection apparatus of claim 1, further comprising a collar fitted around an outside of the cold shrink tube.