CN215486216U - Urea pipe joint of SCR system - Google Patents

Abstract

The utility model discloses a urea pipe joint of an SCR (selective catalytic reduction) system, which comprises a joint main body and a heating sleeve sleeved on the joint main body, wherein the heating sleeve comprises a sleeve shell and a surface heating element arranged in the sleeve shell, the surface heating element and the sleeve shell are integrally molded by injection, and the surface heating element is sleeved on the joint main body through the sleeve shell to provide surface heating for the joint main body. According to the urea pipe joint of the SCR system, the surface heating element is sleeved on the joint main body through the sleeve shell to provide surface heating for the joint main body, so that the heating is faster and the heat transfer is more uniform; and the surface heating member is not directly wound on the joint main body and separates the casing to avoid the problem of safety caused by the carbonization of the outer wall due to long-time heating. The surface heating member and the integrated injection molding of the sleeve shell can be directly sleeved on the connector main body, the installation is convenient and quick, the processing efficiency is improved, and the pipeline waste of the peeling resistance wire is eliminated.

Description

Urea pipe joint of SCR system

Technical Field

The utility model relates to the technical field of pipeline joints, in particular to a urea pipe joint of an SCR system.

Background

The Selective Catalytic Reduction (SCR) technology is a treatment process for NOx in tail gas emission of diesel vehicles, i.e. under the action of a catalyst, a reducing agent ammonia or urea is injected to reduce NOx in tail gas into N2 and H2O. Because urea liquid crystallization easily takes place below zero, leads to the pipeline to block, need heat the urea pipeline in cold season and guarantee normal work.

The Chinese utility model patent 201520617467.0 discloses an electrical heating joint for a urea pipe of an SCR system, which comprises a joint body, wherein a urea pipe joint end connected with the urea pipe is arranged on the joint body, and the axis of the urea pipe joint end is vertical to the axis of the joint body; the connector body is externally provided with a spiral groove which is integrally injection-molded with the connector body, the size and the density of the required resistance wire are determined according to the heating temperature and the heating time required by the SCR system, and the resistance wire is wound in the spiral groove. However, there are the following problems: the resistance wire is wound for heating, so that the heating is slow and uneven, and the outer wall of the urea tube is easily carbonized by long-time heating, so that short circuit ignition is caused, and the device is very unsafe; the winding is on the connector in later stage processing, and the pipeline (the pipeline of peeling off the resistance wire) has been wasted to this kind of mode, in the course of working moreover, needs to twine the resistance wire on the connector, and reuse PVC sticky tape winding is fixed, and man-hour is higher, and is inefficient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a urea pipe joint of an SCR system.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a SCR system urea pipe connects, its includes to connect main part and cover and establish connect the heating jacket of main part, the heating jacket includes the cover shell and locates the face heating member in the cover shell, the face heating member with the integrative injection moulding of cover shell, the face heating member passes through the cover shell cover is established connect in the main part in order to connect the main part to provide the face heating.

As a preferred embodiment of the SCR system urea pipe joint provided by the present invention, the SCR system urea pipe joint further includes an encapsulating layer to encapsulate and fix the heating jacket on the joint main body; two pin ends of the surface heating element extend out of the rubber coating layer.

As a preferred embodiment of the urea pipe joint of the SCR system provided by the present invention, the joint main body is provided with a clamping groove, and the casing is provided with a clamping position, which is adapted to the clamping groove.

As a preferred embodiment of the urea pipe joint of the SCR system provided by the present invention, the casing is a C-shaped casing or a U-shaped casing.

As a preferred embodiment of the urea pipe joint of the SCR system provided by the present invention, the surface heating member is a resistance wire arranged along an arc surface of the casing.

In a preferred embodiment of the urea pipe joint of the SCR system provided by the present invention, one end of the joint body is a urea pipe joint, and the other end of the joint body is provided with a clip.

As a preferred embodiment of the urea pipe joint of the SCR system provided by the present invention, at least one sealing ring is disposed in the joint main body.

In a preferred embodiment of the urea pipe joint for an SCR system according to the present invention, the joint body is an L-shaped joint.

The utility model has the following beneficial effects:

the utility model provides a urea pipe joint of an SCR (selective catalytic reduction) system, which comprises a joint main body and a heating sleeve sleeved on the joint main body, wherein the heating sleeve comprises a sleeve shell and a surface heating element arranged in the sleeve shell; and the surface heating member is not directly wound on the joint main body and separates the casing to avoid the problem of safety caused by the carbonization of the outer wall due to long-time heating. The surface heating member and the integrated injection molding of the sleeve shell can be directly sleeved on the connector main body, the installation is convenient and quick, the processing efficiency is improved, and the pipeline waste of the peeling resistance wire is eliminated.

An encapsulating layer is further added to encapsulate the heating sleeve and fix the heating sleeve on the joint main body; two pin ends of the surface heating element extend out of the rubber coating layer. So design avoids the temperature diffusion to influence the heating effect very fast during the heating, simultaneously the rubber coating layer can also prevent to connect or the heater accident receives the damage that external force strikes and cause in pipeline or the course of working, provides certain guard action for the heating member.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of a urea pipe joint of an SCR system according to the present invention;

FIG. 2 is a schematic structural diagram of another embodiment of a urea pipe joint of an SCR system according to the present invention, wherein pins are not shown extending out of an encapsulating layer;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a cross-sectional perspective view taken at A-A of FIG. 4;

FIG. 6 is an exploded view of a heating jacket in a urea coupling of an SCR system of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present embodiment provides a urea pipe joint of an SCR system, which includes a joint main body 1 and a heating jacket 2 sleeved on the joint main body 1. One end of the joint main body 1 is provided with a urea pipe interface 11 for connecting a urea pipeline, and the other end is provided with a clamping piece 12 for playing a role of preventing the clamping position 24 from falling off after the SAE male end joint is connected. As shown in fig. 3, 5 and 6, the heating jacket 2 comprises a casing 21 adapted to the outer diameter of the connector body 1 and a surface heating member 22 arranged in the casing 21, the surface heating member 22 and the casing 21 are integrally injection-molded, so that the heating jacket 2 can be directly sleeved on the connector body 1 during installation, the installation is convenient and rapid, the processing efficiency is improved, and the waste of a pipeline for peeling off a resistance wire is eliminated. It can be understood that the resistance wire is arranged in a fixed shape, and then the resistance wire is fixed and formed at a high temperature, and then the resistance wire is injection-molded into a fixed shape through injection molding, so that the heating jacket 2 is obtained.

The surface heating element 22 is sleeved on the connector main body 1 through the sleeve 21 to provide surface heating for the connector main body 1, so that heating is faster and heat transfer is more uniform; the surface heating member 22 is not directly wound around the joint body 1, but is arranged to be spaced apart from the jacket 21, so that the outer wall is not easily carbonized by heating for a long time, which is a safety problem.

The two pin ends 23 of the surface heating element 22 extend out of the casing 21, so as to be connected with a heating control system conveniently.

Further, the urea pipe joint of the SCR system also comprises an encapsulating layer 3, and two pin ends 23 of the surface heating element 22 extend out of the encapsulating layer 3. The encapsulating layer 3 can be obtained by injection molding, the heating sleeve 2 is encapsulated and fixed on the joint main body 1, and the heating effect is prevented from being influenced by rapid outward diffusion of temperature during heating.

Furthermore, a clamping groove 13 is formed in the joint main body 1, a clamping position 24 is arranged on the sleeve 21, and the clamping position 24 is matched with the clamping groove 13. By the design, the clamping position 24 is directly clamped into the clamping groove 13, so that the sleeve 21 can be conveniently and quickly positioned and installed. The jacket 21 is a C-shaped jacket or a U-shaped jacket, and is conveniently sleeved on the joint main body 1. Furthermore, the surface heating element 22 is a resistance wire arranged along the arc surface of the casing 21, and is designed to provide the joint main body 1 with a heating radiation area as large as possible, so as to ensure the heating effect and uniformity and avoid uneven heating.

Furthermore, at least one sealing ring 4 is arranged in the joint main body 1, so that the sealing and leakage-preventing effects are achieved.

Further, joint main part 1 connects for L type structure, occupies too much space and is convenient for use in the little space when avoiding using.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the utility model and do not limit the scope of the utility model. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (8)

1. The utility model provides a SCR system urea pipe connects, its characterized in that, it establishes including connecting main part and cover connect the heating jacket of main part, the heating jacket includes the cover shell and locates the face heating member in the cover shell, the face heating member with the integrative injection moulding of cover shell, the face heating member passes through the cover shell cover is established connect in the main part in order to connect the main part to provide the face heating.

2. The SCR system urea pipe coupling of claim 1, further comprising an encapsulating layer to encapsulate the heating jacket onto the coupling body; two pin ends of the surface heating element extend out of the rubber coating layer.

3. The urea pipe joint of the SCR system as claimed in claim 1, wherein the joint body has a slot, and the housing has a detent, the detent being adapted to the slot.

4. The SCR system urea pipe coupling of claim 1 or 3, wherein the casing is a C-shaped casing or a U-shaped casing.

5. The SCR system urea pipe coupling of claim 1, wherein the face heating element is a resistance wire arranged along an arc of the housing.

6. The urea pipe joint of the SCR system according to claim 1, wherein one end of the joint body is a urea pipe joint, and the other end of the joint body is provided with a clamping piece.

7. The SCR system urea line coupler of claim 6, wherein the coupler body has at least one sealing ring disposed therein.

8. The SCR system urea pipe coupling of claim 1, 6, or 7, wherein the coupling body is an L-shaped structural coupling.

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