Novel assembly type flexible connection structure with closed flow guide pipe

Abstract

The utility model relates to a novel assembly type flexible connection structure with a closed flow guide pipe, which comprises a first pipe body, a second pipe body, a first taper flange, a second taper flange, a hoop, a backing ring and a corrugated pipe, the corrugated pipe and the backing ring are sequentially arranged at the left end of the second pipe body from left to right in a sleeving mode and fixedly connected with the second pipe body, the left end of the corrugated pipe is fixedly connected with the second taper flange, and the second taper flange is attached to the end face of the first taper flange and detachably and fixedly connected with the end face of the first taper flange through a hoop. The device is convenient to assemble and disassemble, local replacement can be conveniently carried out according to fault conditions, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust manifolds, specifically to a novel assembled flexible connection structure with a self-sealing guide pipe. Background Technology

[0002] The exhaust manifolds on horizontally opposed engines and six-cylinder engines are much longer than traditional exhaust manifolds. They are prone to fracture failure under thermal stress and thermal vibration. Usually, the integral structure needs to be improved to a segmented structure. Traditional exhaust manifolds are welded together with corrugated pipes. When a failure occurs, the entire exhaust manifold needs to be replaced, which is costly to repair and inconvenient to install and transport.

[0003] The exhaust manifolds of horizontally opposed engines and six-cylinder engines experience complex stresses. On one hand, the high exhaust temperature causes significant thermal stress on the manifold. On the other hand, vibration loads from components such as the turbocharger and aftertreatment system mounted on the exhaust manifold are also transmitted to it. Under these conditions, ensuring a reliable seal to prevent leaks is crucial. Therefore, the bellows, being a weak point in the exhaust manifold, requires extremely stringent material selection, which increases costs.

[0004] Therefore, a new type of exhaust manifold connection structure is needed to overcome the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a novel assembled flexible connection structure with a self-sealing guide tube, which is easy to assemble and disassemble, facilitates partial replacement according to the fault situation, and reduces maintenance costs.

[0006] The technical solution adopted by this utility model is as follows:

[0007] A novel prefabricated flexible connection structure with a self-sealing guide pipe includes a first pipe body, a second pipe body, a first tapered flange, a second tapered flange, a clamp, a gasket, and a bellows. The first tapered flange is fitted onto the right end of the first pipe body and fixedly connected to it. The bellows and gasket are fitted onto the left end of the second pipe body from left to right and fixedly connected to it. The left end of the bellows is fixedly connected to the second tapered flange. The fixed connection is preferably achieved by welding. The end faces of the second tapered flange and the first tapered flange are fitted together and detachably fixedly connected by a clamp. The clamp is preferably a conventional V-shaped stainless steel clamp, which can be opened and closed and is detachably fixedly connected by bolts, etc., for easy disassembly.

[0008] The right end of the first tapered flange is provided with a guide tube with a spherical outer wall. Preferably, the guide tube and the first tapered flange are integral structures. The left end of the second tube extends into the second tapered flange and is fitted over the guide tube with a transition fit. The outer wall of the guide tube is a part of a sphere, and the middle position of the outer wall of the guide tube is higher than the end position of its outer wall. The left end of the second tube can sway slightly along the outer wall of the guide tube to achieve a flexible connection between the two, which adapts to the stress on the first and second tubes during assembly and operation. The middle of the second tapered flange is provided with a second through hole communicating with the second tube. The left end of the second tube extends into the second through hole and is spaced from the inner wall of the second through hole. Under the action of hot air flow, the outer wall of the guide tube and the inner wall of the second tube are always in close contact to form a closed gas flow space. This can not only ensure the positional compensation between the first and second tubes, but also greatly reduce the amount of gas escaping from the flow channel, reduce the impact force of gas on the bellows, improve the life of the bellows, and reduce the material requirements of the bellows to save costs.

[0009] The first tapered flange has a first through hole in the middle that communicates with the first pipe body. The inner wall of the left end of the first through hole is stepped. The right end of the first pipe body contacts the stepped surface. The outer wall of the right end of the first pipe body fits against the inner wall of the left end of the first through hole, which makes it easy to quickly install the first pipe body into the first tapered flange.

[0010] The first tapered flange has a first connecting part in its circumference, and the second tapered flange has a second connecting part in its circumference. The end faces of the second connecting part and the first connecting part are fitted together and detachably fixed by a clamp. Both the first connecting part and the second connecting part are located inside the clamp and are held tightly by the clamp. A sealing gasket is provided between the first connecting part and the second connecting part, preferably a flexible graphite spiral wound gasket. Both the first connecting part and the second connecting part have mounting grooves that mate with the sealing gasket, which serve a sealing function.

[0011] The right end of the first connecting part is provided with a positioning step, and the left end of the second connecting part is provided with a positioning ring that cooperates with the positioning step. The outer wall of the positioning ring fits against the side of the positioning step and plays a positioning role to avoid misalignment and non-concentricity when the first tapered flange and the second tapered flange are assembled.

[0012] The left end of the bellows is provided with a left connecting ring, which is fitted onto the outer wall of the right end of the second tapered flange. The right end of the bellows is provided with a right connecting ring, which is fitted onto the outer wall of the left end of the gasket ring for easy connection.

[0013] This utility model is easy to assemble and disassemble, and allows for partial replacement based on the fault condition, reducing maintenance costs. During transportation, the corresponding parts of the exhaust manifold can be transported in sections, saving storage space and facilitating transportation. During assembly, the first tapered flange and the corresponding second tapered flange are detachably and fixedly connected by clamps, making installation convenient, efficient and quick. If damage occurs during use, only partial replacement is required, saving costs. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the present invention;

[0017] Figure 4 This is a three-dimensional structural diagram of the first tapered flange;

[0018] Figure 5 This is a schematic diagram of the main structure of the first tapered flange;

[0019] Figure 6 This is a three-dimensional structural diagram of the second tapered flange;

[0020] Figure 7 This is a schematic diagram of the main structure of the second tapered flange.

[0021] In the figure: 1-First pipe body, 2-First tapered flange, 3-Clamp, 4-Second tapered flange, 5-Left connecting ring, 6-Bellboard, 7-Right connecting ring, 8-Gasket, 9-Second pipe body, 10-Guide pipe, 11-Positioning ring, 12-Positioning step, 13-Second connecting part, 14-First connecting part, 15-Sealing gasket, 16-Mounting groove, 17-Step surface, 18-Second through hole, 19-First through hole. Detailed Implementation

[0022] like Figures 1-7As shown, a novel prefabricated flexible connection structure with a self-sealing guide pipe includes a first pipe body 1, a second pipe body 9, a first tapered flange 2, a second tapered flange 4, a clamp 3, a gasket 8, and a bellows 6. The first tapered flange 2 is fitted onto the right end of the first pipe body 1 and fixedly connected to it. The bellows 6 and the gasket 8 are fitted onto the left end of the second pipe body 9 from left to right and fixedly connected to it. The left end of the bellows 6 is fixedly connected to the second tapered flange 4. The fixed connection is preferably achieved by welding. The end faces of the second tapered flange 4 and the first tapered flange 2 are fitted together and detachably fixedly connected by the clamp 3. The clamp 3 is preferably a conventional V-shaped stainless steel clamp 3, which can be opened and closed and is detachably fixedly connected by bolts, etc. This is existing technology and will not be described in detail here.

[0023] The right end of the first tapered flange 2 is provided with a guide tube 10 whose outer wall is spherical. Preferably, the guide tube 10 and the first tapered flange 2 are integral structures. The left end of the second tube body 9 extends into the second tapered flange 4 and is fitted over the guide tube 10 with a transition fit. The outer wall of the guide tube 10 is a partial sphere, and the middle position of the outer wall of the guide tube 10 is higher than its end position. The left end of the second tube body 9 can slightly sway along the outer wall of the guide tube 10 to achieve a flexible connection between the two, adapting to the forces on the first tube body 1 and the second tube body 9 during assembly and operation. The flange 4 has a second through hole 18 in the middle that communicates with the second pipe body 9. The left end of the second pipe body 9 extends into the second through hole 18 and is spaced from the inner wall of the second through hole 18. Under the action of hot air flow, the outer wall of the guide pipe 10 and the inner wall of the second pipe body 9 are always in close contact, thus forming a closed gas flow space. This can not only ensure the positional compensation between the first pipe body 1 and the second pipe body 9, but also greatly reduce the amount of gas escaping from the flow channel, reduce the impact force of gas on the bellows 6, improve the service life of the bellows 6, and reduce the material requirements of the bellows 6 to save costs.

[0024] The first tapered flange 2 has a first through hole 19 in the middle that communicates with the first pipe body 1. The inner wall of the left end of the first through hole 19 is stepped. The right end of the first pipe body 1 contacts the stepped surface 17. The outer wall of the right end of the first pipe body 1 fits against the inner wall of the left end of the first through hole 19, which makes it easy to quickly install the first pipe body 1 into the first tapered flange 2.

[0025] The first tapered flange 2 has a first connecting part 14 in its circumference, and the second tapered flange 4 has a second connecting part 13 in its circumference. The end faces of the second connecting part 13 and the first connecting part 14 are attached and detachably fixedly connected by a clamp 3. Both the first connecting part 14 and the second connecting part 13 are located inside the clamp 3 and are held tightly by the clamp 3. A sealing gasket 15 is provided between the first connecting part 14 and the second connecting part 13. A flexible graphite wound gasket is preferably used. Both the first connecting part 14 and the second connecting part 13 are provided with mounting grooves 16 that mate with the sealing gasket 15, which serve a sealing function.

[0026] The right end of the first connecting part 14 is provided with a positioning step 12, and the left end of the second connecting part 13 is provided with a positioning ring 11 that cooperates with the positioning step 12. The outer wall of the positioning ring 11 fits against the side of the positioning step 12 and plays a positioning role to avoid misalignment and non-concentricity when the first tapered flange 2 and the second tapered flange 4 are assembled.

[0027] The left end of the bellows 6 is provided with a left connecting ring 5, which is sleeved on the outer wall of the right end of the second tapered flange 4. The right end of the bellows 6 is provided with a right connecting ring 7, which is sleeved on the outer wall of the left end of the gasket 8 for easy connection.

[0028] This utility model is easy to assemble and disassemble, and allows for partial replacement based on the fault condition, reducing maintenance costs. During transportation, the corresponding parts of the exhaust manifold can be transported in sections, saving storage space and facilitating transportation. During assembly, the first tapered flange 2 and the corresponding second tapered flange 4 can be detachably and fixedly connected by clamps 3, making installation convenient, efficient and quick. If damage occurs during use, only partial replacement is required, saving costs.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A novel flexible connection structure of a self-closed type flow guide pipe with a flexible connection structure, characterized in that: The utility model relates to a kind of pipe, including first pipe body, second pipe body, first taper flange, second taper flange, clamp, grommet and bellows, first taper flange is sleeved in the right end of first pipe body and is fixedly connected with first pipe body, bellows and grommet are sequentially from left to right and are fixedly connected with second pipe body, the left end of bellows is fixedly connected with second taper flange, second taper flange and the end surface of first taper flange are in contact and are detachably fixedly connected by clamp;The right end of first taper flange is equipped with the flow guide pipe of outer wall as spherical surface, the left end of second pipe body extends to second taper flange and is sleeved on the outer wall of flow guide pipe and is transition fit.

2. The novel assembled self-closed type flow pipe flexible connection structure according to claim 1, characterized in that: The middle part of first taper flange is equipped with the first through hole being communicated with first pipe body, the left end inner wall of first through hole is stepped, the right end of first pipe body is in contact with step surface, and the right end outer wall of first pipe body is in contact with the left end inner wall of first through hole.

3. The novel assembled flexible connection structure of the self-closing type flow pipe according to claim 1, characterized in that: The circumference of first taper flange is equipped with first connecting part, and the circumference of second taper flange is equipped with second connecting part, and the end surface of second connecting part is in contact with first connecting part and is detachably fixedly connected by clamp;Sealing washer is arranged between first connecting part and second connecting part, and mounting groove matched with sealing washer is arranged on first connecting part and second connecting part.

4. The novel assembled flexible connection structure of the self-closing type flow pipe according to claim 3, characterized in that: The right end of first connecting part is equipped with positioning step, and the left end of second connecting part is equipped with positioning ring matched with positioning step, and the outer wall of positioning ring is in contact with the side surface of positioning step.

5. The novel assembled self-closing type flexible connection structure of the guide pipe according to claim 1, characterized in that: The left end of bellows is equipped with left connecting ring, and left connecting ring is sleeved on the outer wall of the right end of second taper flange, and the right end of bellows is equipped with right connecting ring, and right connecting ring is sleeved on the outer wall of the left end of grommet.

Images