A sealed stainless steel threaded pipe connection structure for automobiles

Abstract

The utility model relates to the technical field of automobile steel pipe, especially a sealed stainless steel threaded pipe connecting structure for automobile, including first pipeline and second pipeline, movable structure includes fixed base, the outer surface of fixed base is opened sliding slot, the inside swing joint of sliding slot has screw thread connection strip, one end fixedly connected with the clamping rod of screw thread connection strip, the upper surface of clamping rod is opened the clamping groove, the outer surface of fixed base is opened the gyration groove, the inside swing joint of gyration groove has gyration block, the outer surface of gyration block is fixedly connected with gyration seat, the side surface of limiting seat is opened square groove, the outer surface of limiting seat is opened accommodating groove, the inside swing joint of accommodating groove has limiting block, the outer surface of limiting block is fixedly connected with the rotating block, the utility model can make the connection between first pipeline and second pipeline more stable, thereby reach the effect that avoid " hot loose " of first pipeline and second pipeline, realize the purpose that guarantee sealed firm.

Description

Technical Field

[0001] This utility model relates to the field of automotive steel pipe technology, specifically to a sealed stainless steel threaded pipe connection structure for automobiles. Background Technology

[0002] Automotive sealed stainless steel threaded pipes are pipe components used in the automotive field, featuring good sealing performance and corrosion resistance. They are typically made of stainless steel, which has good corrosion resistance, high temperature resistance, and strength, to adapt to various harsh environments during automotive operation.

[0003] The connection areas of automotive exhaust systems and engine coolant lines are in a high-temperature environment for a long time. The temperature of the exhaust system can reach 600-800℃. There may be a difference in the coefficient of thermal expansion and contraction between stainless steel pipes and connecting components (such as catalytic converters and water pumps). That is, when the temperature rises, the different expansion amounts of the two will cause the pre-tightening torque of the threaded connection to decrease. Therefore, after repeated temperature fluctuations, "thermal loosening" may occur, leading to seal failure. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a sealed stainless steel threaded pipe connection structure for automobiles, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealed stainless steel threaded pipe connection structure for automobiles, comprising a first pipe and a second pipe, and further comprising a movable structure, a limiting structure, a first threaded structure, and a second threaded structure, wherein:

[0006] The movable structure includes a fixed base, the inner surface of which is fixedly connected to the outer surface of the first pipe. A sliding groove is formed on the outer surface of the fixed base, and a threaded connecting strip is movably connected inside the sliding groove. A locking rod is fixedly connected to one end of the threaded connecting strip, and a locking groove is formed on the upper surface of the locking rod. A rotary groove is formed on the outer surface of the fixed base, and a rotary block is movably connected inside the rotary groove. A rotary seat is fixedly connected to the outer surface of the rotary block.

[0007] The limiting structure includes a limiting seat, the inner surface of which is fixedly connected to the outer surface of the second pipe, a square groove is formed on the side surface of the limiting seat, a receiving groove is formed on the outer surface of the limiting seat, a limiting block is movably connected inside the receiving groove, and a rotating block is fixedly connected to the outer surface of the limiting block.

[0008] As a preferred embodiment of this utility model, the number of sliding grooves, threaded connecting strips, locking rods and locking slots is six, and they are distributed circumferentially around the center of the fixed seat. The inner surface of the rotary seat is threadedly connected to the upper surface of the threaded connecting strip.

[0009] As a preferred embodiment of this utility model, the number of the square groove, the receiving groove, and the limiting block is six, and they are distributed in a circular pattern around the center of the limiting seat.

[0010] As a preferred technical solution of this utility model, the side surface of the fixing base is provided with ventilation grooves, and there are multiple ventilation grooves, which are distributed in a circle around the center of the fixing base.

[0011] As a preferred embodiment of this utility model, the ventilation slot has a narrow tube shape.

[0012] As a preferred embodiment of the present invention, the first threaded structure includes an internal thread groove located on the inner surface of the second pipe. A first placement groove is formed on the inner surface of the internal thread groove, and a first sealing ring is provided inside the first placement groove.

[0013] As a preferred technical solution of this utility model, the second threaded structure includes an external threaded groove, which is located on the outer surface of the first pipe. The external threaded groove is threadedly connected to the internal threaded groove. A second placement groove is provided on the outer surface of the external threaded groove, and a second sealing ring is provided on the outer surface of the second placement groove.

[0014] Compared with the prior art, this utility model provides a sealed stainless steel threaded pipe connection structure for automobiles, which has the following advantages:

[0015] This is a sealing stainless steel threaded pipe connection structure for automobiles. Through a movable structure and a limiting structure, after the threaded pipe is connected, the locking rod and locking groove in the movable structure are connected to the square groove and limiting block in the limiting structure, thereby connecting and fixing the fixed seat and the limiting seat. This makes the connection between the first pipe and the second pipe more stable, thus avoiding the effect of "thermal loosening" between the first pipe and the second pipe and achieving the purpose of ensuring a stable seal. Attached Figure Description

[0016] Figure 1 This is a first-person perspective schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective;

[0018] Figure 3 This is a half-sectional schematic diagram of the present invention;

[0019] Figure 4 This utility model Figure 3 Enlarged view of the structure at point A in the middle;

[0020] Figure 5 This utility model Figure 3 Enlarged view of the structure at point B in the middle;

[0021] Figure 6 This is a schematic diagram showing the connection state between the threaded connecting strip and the rotary seat of this utility model;

[0022] Figure 7 This is a schematic diagram showing the connection state between the movable structure and the limiting structure of this utility model;

[0023] Figure 8 This is a schematic diagram showing the state of the movable structure and the limiting structure of this utility model.

[0024] In the diagram: 1. First pipe; 2. Second pipe; 3. Movable structure; 301. Fixed seat; 302. Sliding groove; 303. Threaded connecting strip; 304. Locking rod; 305. Locking groove; 306. Rotary groove; 307. Rotary block; 308. Rotary seat; 4. Limiting structure; 401. Limiting seat; 402. Square groove; 403. Receiving groove; 404. Limiting block; 405. Rotating block; 5. Ventilation groove; 6. First threaded structure; 601. Internal threaded groove; 602. First placement groove; 603. First sealing ring; 7. Second threaded structure; 701. External threaded groove; 702. Second placement groove; 703. Second sealing ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0026] Please see Figure 1-8 This utility model discloses a sealed stainless steel threaded pipe connection structure for automobiles, including a first pipe 1 and a second pipe 2, characterized in that it further includes a movable structure 3, a limiting structure 4, a first threaded structure 6, and a second threaded structure 7, wherein:

[0027] The movable structure 3 includes a fixed base 301, the inner surface of which is fixedly connected to the outer surface of the first pipe 1. The fixed base 301 determines the position of the locking rod 304, facilitating connection with the limiting seat 401. A sliding groove 302 is provided on the outer surface of the fixed base 301, allowing the threaded connecting strip 303 to slide within it. The threaded connecting strip 303 is movably connected inside the sliding groove 302. A threaded tooth is provided on the upper surface of the threaded connecting strip 303. The movement of the threaded connecting strip 303 pushes the locking rod 304 to move, facilitating its insertion. The locking rod 304 is fixedly connected to one end of the threaded connecting strip 303. 4. It can connect the fixed base 301 and the limiting base 401, so as to facilitate a stable connection between the fixed base 301 and the limiting base 401. The upper surface of the locking rod 304 is provided with a locking groove 305. The locking groove 305 can better fix the locking rod 304 after it is inserted, so as to form a stable connection. The outer surface of the fixed base 301 is provided with a rotary groove 306. The rotary groove 306 facilitates the use of the rotary block 307. The rotary block 307 is movably connected inside the rotary groove 306. The outer surface of the rotary block 307 is fixedly connected with a rotary seat 308. The inner surface of the rotary seat 308 is provided with an internal thread. By rotating the rotary seat 308, the movement of the threaded connecting bar 303 can be controlled.

[0028] The limiting structure 4 includes a limiting seat 401. The inner surface of the limiting seat 401 is fixedly connected to the outer surface of the second pipe 2. A square groove 402 is provided on the side surface of the limiting seat 401, which facilitates the insertion of the locking rod 304 into the limiting seat 401. A receiving groove 403 is provided on the outer surface of the limiting seat 401, which can accommodate the limiting block 404 to move inside, facilitating the use of the limiting block 404. The limiting block 404 is movably connected inside the receiving groove 403, which can fix the locking rod 304 after it enters the locking groove 305. A rotating block 405 is fixedly connected to the outer surface of the limiting block 404, which can control the movement of the limiting block 404.

[0029] There are six sliding grooves 302, threaded connecting bars 303, locking rods 304 and locking slots 305, which are distributed in a circle around the center of the fixed base 301. The inner surface of the rotary base 308 is threadedly connected to the upper surface of the threaded connecting bar 303. The rotary base 308 is threadedly connected to the threaded tooth pitch on the upper surface of the threaded connecting bar 303 through the internal thread. By rotating the rotary base 308, the threaded connecting bar 303 that is threadedly connected to it is moved in a controlled manner.

[0030] There are six square grooves 402, receiving grooves 403, and limiting blocks 404, which are distributed in a circle around the center of the limiting seat 401. The movable structure 3 and the limiting structure 4 correspond to each other.

[0031] The side surface of the fixed base 301 is provided with ventilation grooves 5. There are multiple ventilation grooves 5, which are distributed in a circle around the center of the fixed base 301. The multiple ventilation grooves 5 are respectively located at the corresponding positions below the sliding groove 302.

[0032] The ventilation slot 5 has a narrow tube shape. Due to the narrow tube effect, when air passes through the narrow channel in the ventilation slot 5, the cross-sectional area is small and the air velocity is passively increased. The increase in air velocity can significantly improve heat dissipation efficiency. Therefore, during operation, the ventilation slot 5 can quickly dissipate heat for the fixed seat 301, and prevent the heat generated by the first pipe 1 and the second pipe 2 from affecting the fixed seat 301, that is, ensure the preload of the threaded connection between the threaded connecting bar 303 and the rotary seat 308.

[0033] The first threaded structure 6 includes an internal thread groove 601, which is located on the inner surface of the second pipe 2. A first placement groove 602 is provided on the inner surface of the internal thread groove 601. A first sealing ring 603 is provided inside the first placement groove 602. The first sealing ring 603 can fill the gap between the first pipe 1 and the second pipe 2 to ensure a seal.

[0034] The second threaded structure 7 includes an external threaded groove 701, which is located on the outer surface of the first pipe 1. The external threaded groove 701 is threadedly connected to the internal threaded groove 601. A second placement groove 702 is provided on the outer surface of the external threaded groove 701, and a second sealing ring 703 is provided on the outer surface of the second placement groove 702. The second sealing ring 703 can fill the gap between the second pipe 2 and the first pipe 1, forming a double seal with the first sealing ring 603, so that the sealing effect between the first pipe 1 and the second pipe 2 remains stable. Since the internal threaded groove 601 and the external threaded groove 701 are threadedly connected, after the internal threaded groove 601 and the external threaded groove 701 are threadedly connected, the position of the clamp 304 and the square groove 402 is fixed, which facilitates the connection between the movable structure 3 and the limiting structure 4.

[0035] The working principle and usage process of this utility model are as follows: First, place the first sealing ring 603 and the second sealing ring 703 on the first placement groove 602 and the second placement groove 702 respectively. Then, align the external thread groove 7 with the internal thread groove 601 and screw it in until the first sealing ring 603 is tightly attached to the side wall of the external thread groove 701 and the second sealing ring 703 is tightly attached to the inner side wall of the internal thread groove 601, thus completing the connection between the first pipe 1 and the second pipe 2.

[0036] At this point, the locking rod 304 corresponds to the square groove 402, and the rotary seat 308 can be rotated to push the threaded connecting strip 303 to move, so that the locking rod 304 is aligned with the square groove 402 and inserted. When the locking groove 305 corresponds to the receiving groove 403, the rotating block 405 is controlled to rotate, driving the limiting block 404 to insert into the locking groove 305. Then, the rotary seat 308 is reversed, so that the threaded connecting strip 303 drives the locking rod 304 to retract, so that the inner side of the locking groove 305 is in close contact with the side surface of the limiting block 404, so that the limiting block 404 locks the locking rod 304. With the reaction force generated by the close contact between the locking groove 305 and the limiting block 404, the locking rod 304 can no longer retract, so the rotary seat 308 is restricted from rotating. At this point, the connection between the movable structure 3 and the limiting structure 4 is completed, so that it supports the complete connection structure, thereby preventing "thermal loosening".

[0037] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A sealed stainless steel threaded pipe connection structure for automobiles, comprising a first pipe (1) and a second pipe (2), characterized in that: It also includes an active structure (3), a limiting structure (4), a first threaded structure (6), and a second threaded structure (7), wherein: The movable structure (3) includes a fixed seat (301), the inner surface of the fixed seat (301) is fixedly connected to the outer surface of the first pipe (1), the outer surface of the fixed seat (301) is provided with a sliding groove (302), the sliding groove (302) is movably connected with a threaded connecting strip (303), one end of the threaded connecting strip (303) is fixedly connected with a locking rod (304), the upper surface of the locking rod (304) is provided with a locking groove (305), the outer surface of the fixed seat (301) is provided with a rotary groove (306), the rotary groove (306) is movably connected with a rotary block (307), and the outer surface of the rotary block (307) is fixedly connected with a rotary seat (308). The limiting structure (4) includes a limiting seat (401), the inner surface of the limiting seat (401) is fixedly connected to the outer surface of the second pipe (2), a square groove (402) is opened on the side surface of the limiting seat (401), a receiving groove (403) is opened on the outer surface of the limiting seat (401), a limiting block (404) is movably connected inside the receiving groove (403), and a rotating block (405) is fixedly connected to the outer surface of the limiting block (404).

2. The automotive sealed stainless steel threaded pipe connection structure according to claim 1, characterized in that: The number of sliding grooves (302), threaded connecting strips (303), locking rods (304) and locking slots (305) is six, and they are distributed in a circle around the center of the fixed seat (301). The inner surface of the rotary seat (308) is threadedly connected to the upper surface of the threaded connecting strips (303).

3. The automotive sealed stainless steel threaded pipe connection structure according to claim 1, characterized in that: The number of the square groove (402), the receiving groove (403), and the limiting block (404) is six, and they are distributed in a circle around the center of the limiting seat (401).

4. The automotive sealed stainless steel threaded pipe connection structure according to claim 1, characterized in that: The side surface of the fixed base (301) is provided with ventilation grooves (5), and there are multiple ventilation grooves (5) distributed in a circle around the center of the fixed base (301).

5. The automotive sealed stainless steel threaded pipe connection structure according to claim 4, characterized in that: The ventilation slot (5) has a narrow tube shape.

6. The automotive sealed stainless steel threaded pipe connection structure according to claim 1, characterized in that: The first threaded structure (6) includes an internal thread groove (601), which is located on the inner surface of the second pipe (2). A first placement groove (602) is provided on the inner surface of the internal thread groove (601), and a first sealing ring (603) is provided inside the first placement groove (602).

7. The automotive sealed stainless steel threaded pipe connection structure according to claim 1, characterized in that: The second threaded structure (7) includes an external threaded groove (701), which is located on the outer surface of the first pipe (1). The external threaded groove (701) is threadedly connected to the internal threaded groove (601). A second placement groove (702) is provided on the outer surface of the external threaded groove (701), and a second sealing ring (703) is provided on the outer surface of the second placement groove (702).

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