An insert provided with an anti-loosening structure

Abstract

The utility model discloses an embedded part with anti -loose structure, including embedded part body, the lateral wall of embedded part body is equipped with the reinforcing rib, embedded part body is equipped with first end pipe and second end pipe, and first end pipe and second end pipe intercommunication, and embedded part body sets up in the valve body. The technical effect reached is: through the reinforcing rib, increase the contact area and the connecting stress point between valve body and embedded part body, enhance the displacement restriction between valve body and embedded part body, thereby increase the adhesion rate and the combination strength between both, avoid the gap between embedded part body and valve body and cause the leakage, improve the reliability, the end of installation end pipe is equipped with the convex edge, and installation end pipe sets up in the valve body, and the convex edge can be cast into a section of valve body aluminum material between embedded part body, and the mutual force of formation between this section of aluminum material and the convex edge can resist the thread pre -tightening force, prevent the deformation of valve body and embedded part body when screwing into the sensor and cause the leakage.

Description

Technical Field

[0001] This utility model relates to the field of anti-corrosion structural components, specifically to an insert with an anti-loosening structure. Background Technology

[0002] With increasingly stringent vehicle emission regulations, the performance and reliability of exhaust gas recirculation (EGR) systems, as a key technology for reducing nitrogen oxide (NOx) emissions, have received widespread attention. The EGR valve, as a core component of the EGR system, is responsible for precisely controlling the flow rate of recirculated exhaust gas. Its valve body is constantly exposed to high temperatures and corrosive exhaust gas environments, facing severe corrosion risks. To improve corrosion resistance, a common design now involves embedding stainless steel inserts within the internal flow channels of the die-cast aluminum valve body. This utilizes the excellent corrosion resistance of stainless steel to protect the aluminum valve body substrate and extend the component's service life.

[0003] However, existing insert designs still present significant technical challenges in practical applications. Firstly, due to the substantial difference in thermal expansion coefficients between stainless steel and aluminum alloy, thermal stress easily arises at the interface between the two materials during die casting and subsequent temperature changes, affecting the tightness of the bond. More importantly, inserts are typically located at the junction of the flow channel and the external mounting interface. When the valve body is connected to threaded fittings, the external installation force is directly transmitted to the interface between the aluminum valve body and the insert. Under long-term vibration or stress, micro-displacement or plastic deformation may occur between the aluminum valve body and the stainless steel insert, leading to poor metal-to-metal adhesion and the formation of micro-gaps. These gaps become leakage channels for high-temperature exhaust gases, causing a decrease in the airtightness of the EGR system, directly affecting the accuracy of exhaust gas flow control, and resulting in substandard overall system performance.

[0004] Secondly, to meet functional expansion requirements, threaded holes are typically required on the side of the EGR valve body's flow channel for mounting auxiliary devices such as pressure sensors and temperature sensors. During the screwing in or tightening of these threaded fasteners, the resulting localized stress concentration can easily cause slight deformation of the aluminum valve body. While this deformation is insufficient to damage the overall valve body structure, it disrupts the original press-fit or encapsulation between the insert and the aluminum substrate, further weakening the interfacial seal integrity and exacerbating the risk of gas leakage. Especially under high-temperature conditions, material creep may amplify sealing failures caused by such installation stresses.

[0005] Therefore, the existing valve insert structure has insufficient sealing reliability when dealing with the coupling effect of mechanical installation force and thermal load. There is an urgent need for a new insert design that can effectively resist external stress interference and maintain long-term airtight stability. Utility Model Content

[0006] Therefore, this utility model provides an insert with an anti-loosening structure to solve the above-mentioned problems in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] According to a first aspect of the present invention, an insert with an anti-loosening structure includes an insert body, wherein a reinforcing rib is provided on the outer side wall of the insert body; the insert body is provided with a first end tube and a second end tube, the first end tube and the second end tube are connected, and the insert body is disposed in a valve body.

[0009] Furthermore, the first end tube is provided with an installation end tube, which is connected to the first end tube.

[0010] Furthermore, the end of the mounting tube is provided with a raised edge, and the mounting tube is embedded in the valve body.

[0011] Furthermore, the reinforcing ribs are in the form of a mesh, and the reinforcing ribs are evenly distributed on the outer side wall of the insert body.

[0012] Furthermore, the convex edge is annular, the mounting end tube is provided with internal threads, and the valve body is provided with mounting holes, which are correspondingly arranged with the mounting end tube.

[0013] Furthermore, the first end tube, the second end tube, and the mounting end tube are an integral structure.

[0014] Furthermore, the second end tube is perpendicular to the first end tube, the mounting end tube is perpendicular to the first end tube, and the mounting end tube is perpendicular to the second end tube.

[0015] Furthermore, the end of the first end tube is provided with a first flange, and the end of the second end tube is provided with a second flange.

[0016] Furthermore, the outer end faces of the first flange and the second flange are respectively flush with the corresponding outer end faces of the valve body.

[0017] Furthermore, the width of both the first flange and the second flange is greater than the width of the convex edge.

[0018] This utility model has the following advantages: The outer wall of the insert body is provided with reinforcing ribs, which increase the contact area and connection stress points between the valve body and the insert body, enhance the displacement restriction between the valve body and the insert body, thereby increasing the fit rate and bonding strength between them, resisting minor deformations that may occur when connecting external components, ensuring reliable fit of the insert body during use, avoiding gaps between the insert body and the valve body that could cause leakage, and improving system performance reliability; the end of the mounting tube is provided with a raised edge, and the mounting tube is located inside the valve body. A section of valve body aluminum material can be cast between the raised edge and the insert body. This section of aluminum material and the raised edge can form an interaction force, resisting the thread preload to a certain extent, preventing deformation of the valve body and the insert body when screwing in the sensor, which could lead to leakage. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 A first-view view of an insert with an anti-loosening structure provided for some embodiments of the present invention.

[0022] Figure 2 A second-view view of an insert with an anti-loosening structure provided for some embodiments of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of an insert with an anti-loosening structure installed in the valve body, according to some embodiments of the present invention.

[0024] Figure 4 This is a partial cross-sectional view of an insert with an anti-loosening structure disposed in the valve body, according to some embodiments of the present invention.

[0025] In the diagram: 1. Insert body, 2. First end tube, 3. Second end tube, 4. Third mounting end tube, 5. Mounting end tube, 6. Reinforcing rib, 7. First flange, 8. Second flange, 9. Raised edge, 10. Valve body, 11. Sensor, 12. External connecting flange, 13. Screw. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1

[0028] like Figures 1 to 4 As shown, an insert with an anti-loosening structure in the first aspect embodiment of the present invention includes an insert body 1, which is made of stainless steel and has reinforcing ribs 6 on its outer side wall; the insert body 1 has a first end tube 2, a second end tube 3 and a third mounting end tube 4, which are connected to each other; the insert body 1 is disposed inside a valve body 10, specifically, the valve body 10 is die-cast from aluminum material onto the outside of the insert body 1;

[0029] The first end tube 2 is provided with an installation end tube 5, which is connected to the first end tube 2. The installation end tube 5 is provided with an internal thread, which is used to connect with the sensor 11.

[0030] In this embodiment, it should be noted that the first end pipe 2, the second end pipe 3, the third mounting end pipe 4, and the mounting end pipe 5 are an integral structure. The first end pipe 2 and the third mounting end pipe 4 are coaxial, and the second end pipe 3 is perpendicular to the first end pipe 2. The first end pipe 2 and the second end pipe 3 are used to connect the exhaust gas passage, and the third mounting end pipe 4 is used to connect the valve stem assembly. The valve stem assembly is sealed to the third mounting end pipe 4, and the valve stem assembly passes through the first end pipe 2. The valve disc is set on the outer end face of the first end pipe 2. During use, the opening and closing of the first end pipe 2 can be controlled by controlling the valve disc;

[0031] The mounting end tube 5 is perpendicular to the first end tube 2 and the mounting end tube 5 is perpendicular to the second end tube 3. The first end tube 2, the second end tube 3 and the third mounting end tube 4 can effectively disperse the force when installing the sensor 11.

[0032] The technical effects achieved in this embodiment are as follows: The outer side wall of the insert body 1 is provided with reinforcing ribs 6, which increases the contact area and connection stress points between the valve body 10 and the insert body 1, and enhances the displacement restriction between the valve body 10 and the insert body 1, thereby increasing the fit rate and bonding strength between the two, resisting the minor deformation that may occur when connecting external components, making the insert body 1 fit reliably during use, avoiding gaps between the insert body 1 and the valve body 10 that could cause leakage, and improving the reliability of system performance; The ends of the first end tube 2 and the second end tube 3 are respectively provided with flanges, and the flanges are flush with the outer end face of the valve body, which can form a protective effect on the valve body 10 and prevent the valve body from being corroded.

[0033] Example 2

[0034] like Figures 1 to 4 As shown, this embodiment provides another insert with an anti-loosening structure, the structure of which includes all the contents of embodiment 1. Only the different parts are described below.

[0035] In this embodiment, the end of the mounting tube 5 is provided with a protruding edge 9. The mounting tube 5 is embedded in the valve body 10. The valve body 10 is provided with a mounting hole. The mounting hole and the mounting tube 5 are provided in correspondence. Specifically, the mounting tube 5 is connected to the mounting hole, and the mounting tube 5 and the mounting hole are coaxial.

[0036] In this embodiment, it should be noted that the protruding edge 9 and the mounting end tube 5 are an integral structure. The protruding edge 9 is annular, and the width of the protruding edge 9 is 1mm to 3mm. Specifically, the protruding edge 9 is preferably annular, and the width of the protruding edge 9 can be set to 1mm, 2mm or 3mm.

[0037] The technical effect achieved by this embodiment is as follows: the end of the mounting tube 5 is provided with a protruding edge 9, and the mounting tube 5 is set inside the valve body 10. A section of valve body aluminum material can be cast between the protruding edge 9 and the insert body 1. This section of aluminum material and the protruding edge can form an interaction force, which can resist the thread preload to a certain extent and prevent the valve body and insert body from deforming and causing leakage when the sensor is screwed in.

[0038] Example 3

[0039] like Figures 1 to 4 As shown, this embodiment provides another insert with an anti-loosening structure, the structure of which includes all the contents of embodiment 1. Only the different parts are described below.

[0040] In this embodiment, the reinforcing rib 6 is mesh-shaped, and each node of the mesh has a protrusion, which can further increase the stress points and contact area, making the connection between the insert body 1 and the valve body 10 more secure.

[0041] In this embodiment, it should be noted that the reinforcing rib 6 and the insert body 1 are an integral structure, and the reinforcing rib 6 is evenly distributed on the outer side wall of the insert body 1.

[0042] Example 4

[0043] like Figures 1 to 3 As shown, this embodiment provides another insert with an anti-loosening structure, the structure of which includes all the contents of embodiment 1. Only the different parts are described below.

[0044] In this embodiment, as Figure 3 and Figure 4 As shown, the end of the first end tube 2 is provided with a first flange 7, and the end of the second end tube 3 is provided with a second flange 8. The outer end face of the first flange 7 and the outer end face of the second flange 8 are respectively flush with the corresponding outer end face of the valve body 10. On the valve body 10, threaded holes are provided on both sides of the outer end face of the first end tube 2 and threaded holes are provided on both sides of the outer end face of the second end tube 3. An external connecting flange 12 is installed on the outer end face of the first end tube 2 by screws.

[0045] In this embodiment, it should be noted that the width of the first flange 7 and the width of the second flange 8 are both greater than the width of the convex edge 9. Specifically, the width of the first flange 7 and the width of the second flange 8 are the same, and the width of the first flange 7 can be set to 5mm to 15mm.

[0046] The technical effect achieved by this embodiment is that the outer end face of the first flange 7 and the outer end face of the second flange 8 are respectively flush with the corresponding outer end face of the valve body 10. The first flange 7 and the second flange 8 can form a sealed connection with the corresponding exhaust gas channel, thereby avoiding direct contact of exhaust gas with the valve body 10 and thus preventing the valve body 10 from being corroded.

[0047] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0048] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. An insert with an anti-loosening structure, characterized in that, Includes an insert body (1), on which a reinforcing rib (6) is provided on the outer side wall; the insert body (1) is provided with a first end tube (2) and a second end tube (3), the first end tube (2) and the second end tube (3) are connected, and the insert body (1) is disposed inside the valve body (10).

2. An insert with an anti-loosening structure according to claim 1, characterized in that, The first end tube (2) is provided with an installation end tube (5), which is connected to the first end tube (2).

3. An insert with an anti-loosening structure according to claim 2, characterized in that, The end of the mounting end tube (5) is provided with a protruding edge (9), and the mounting end tube (5) is embedded in the valve body (10).

4. An insert with an anti-loosening structure according to claim 1, characterized in that, The reinforcing ribs (6) are in the form of a grid, and the reinforcing ribs (6) are evenly distributed on the outer side wall of the insert body (1).

5. An insert with an anti-loosening structure according to claim 3, characterized in that, The protruding edge (9) is annular, the mounting end tube (5) is provided with internal thread, and the valve body (10) is provided with mounting hole, which is provided in correspondence with the mounting end tube (5).

6. An insert with an anti-loosening structure according to claim 2, characterized in that, The first end tube (2), the second end tube (3) and the mounting end tube (5) are an integral structure.

7. An insert with an anti-loosening structure according to claim 6, characterized in that, The second end tube (3) is perpendicular to the first end tube (2), the mounting end tube (5) is perpendicular to the first end tube (2), and the mounting end tube (5) is perpendicular to the second end tube (3).

8. An insert with an anti-loosening structure according to claim 3, characterized in that, The end of the first end tube (2) is provided with a first flange (7), and the end of the second end tube (3) is provided with a second flange (8).

9. An insert with an anti-loosening structure according to claim 8, characterized in that, The outer end face of the first flange (7) and the outer end face of the second flange (8) are flush with the outer end face of the valve body (10).

10. An insert with an anti-loosening structure according to claim 8, characterized in that, The width of the first flange (7) and the width of the second flange (8) are both greater than the width of the convex edge (9).

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