Exhaust connecting pipe fastening assembly with adjustable pipe diameter

Abstract

The utility model relates to the technical field of pipeline connection and fastening, and discloses an exhaust connecting pipe fastening assembly capable of adjusting the pipe diameter, which comprises an exhaust pipe, a rotary reducing clamping part and an inflation attaching sealing part, and a connecting pipe is arranged at one end of the exhaust pipe. Through the synergistic effect of related structures, adjustment can be conducted according to the actual pipe diameter of the exhaust pipe and the actual pipe diameter of the connecting pipe, stable clamping can be achieved no matter what difference exists in the pipe diameter, special clamping parts do not need to be independently arranged for different pipe diameters, and the pipe diameter adjusting device is suitable for various pipeline connecting scenes; all the components are matched with one another to generate uniform and continuous clamping force, so that the pipeline is firmly fixed, and the pipeline is prevented from loosening or displacing due to factors such as vibration and pressure change in the exhaust process. The stable clamping ensures the normal operation of the exhaust system.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection and fastening technology, specifically to an adjustable diameter exhaust pipe fastening assembly. Background Technology

[0002] In industrial production and mechanical equipment exhaust systems, the fastening and sealing of exhaust connection pipes are crucial for ensuring the normal operation of the system. Currently, traditional exhaust connection pipe fastening assemblies are usually designed with fixed sizes, only suitable for pipes of specific diameters. When it is necessary to connect exhaust pipes and connection pipes of different diameters, it is often necessary to replace them with fastening assemblies of different specifications. This not only increases equipment procurement costs and inventory pressure, but also prolongs installation or maintenance time due to frequent component replacements, seriously affecting work efficiency.

[0003] In addition, traditional sealing methods mostly rely on rigid sealing components such as rubber gaskets. Their sealing effect requires high flatness of the pipe surface and high connection accuracy. Once there are minor scratches on the pipe surface or slight deviations in the connection, gaps are easily generated, causing exhaust leakage. This not only reduces the working efficiency of the exhaust system, but may also pollute the environment due to the presence of harmful substances in the leaked gas, and may even cause safety hazards. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable-diameter exhaust pipe fastening assembly, which solves the technical problems of traditional exhaust pipe fastening assemblies being difficult to adapt to pipes of different diameters, having insufficient clamping stability, and poor sealing effect. It achieves the goal of being able to flexibly adjust to meet the connection requirements of exhaust pipes of different diameters, realize the stable clamping and tight sealing of the pipe, and improve the versatility, reliability and practicality of the exhaust pipe fastening assembly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable diameter exhaust pipe fastening assembly, comprising an exhaust pipe, a rotating diameter-changing clamping part, and an inflatable fitting and sealing part, wherein a connecting pipe is provided at one end of the exhaust pipe; the rotating diameter-changing clamping part is disposed on the outer wall of the exhaust pipe and the connecting pipe; and the inflatable fitting and sealing part is movably sleeved on the outer wall of the exhaust pipe and the connecting pipe, respectively.

[0006] Preferably, the rotating diameter clamping part specifically includes: a fastening housing, respectively disposed on the outer wall of the exhaust pipe and the connecting pipe; a fixing block, circumferentially and equidistantly fixed on the outer wall of the fastening housing; and a through opening, formed on the outer wall of the fastening housing.

[0007] Preferably, the fixing block has an installation groove, a telescopic slide cylinder is fixedly installed inside the installation groove, the inner wall of the telescopic slide cylinder has symmetrical rectangular limiting grooves, the top outer wall of the telescopic slide cylinder is connected to a rotating sleeve, and a telescopic slide rod is provided inside the telescopic slide cylinder.

[0008] Preferably, rectangular sliders are symmetrically fixedly installed on the outer wall of the telescopic slide rod, a threaded sleeve is provided at one end of the telescopic slide rod, a threaded screw is provided inside the telescopic slide cylinder, a rotating plate is fixedly connected to the threaded screw through a rotating sleeve, and a rotating block is fixedly installed on the top outer wall of the rotating plate.

[0009] A telescopic slide rod is installed. When the rotating block is rotated, the threaded screw rotates accordingly, driving the telescopic slide rod to move linearly via threaded transmission. This transmission method can precisely control the extension and retraction of the telescopic slide rod, thus adapting to exhaust pipes and connecting pipes of different diameters. This greatly expands the applicability of the fastening assembly. Whether the pipe diameter has slight differences or large variations, reliable clamping can be achieved through this cooperation. The cooperation between the telescopic slide rod, the rectangular slider, and the rectangular limiting groove further enhances the stability of the overall structure. The rectangular slider slides within the rectangular limiting groove, strictly limiting the movement direction of the telescopic slide rod, effectively preventing deviation or rotation during extension and retraction, ensuring that it always moves smoothly along the predetermined direction. This allows the clamping pad to act accurately and evenly on the outer wall of the pipe, ensuring the clamping firmness and reducing connection loosening problems caused by shaking.

[0010] Preferably, the telescopic slide rod is threadedly connected to the threaded screw via a threaded sleeve, and the telescopic slide rod is slidably installed inside the rectangular limiting slide groove via a rectangular slider. The other end of the telescopic slide rod moves through the bottom of the inner wall of the telescopic slide cylinder and extends into the interior of the fastening housing. A clamping pad is fixedly installed at the other end of the telescopic slide rod.

[0011] Preferably, the inflatable sealing part specifically includes: a positioning sleeve, which is fixedly installed on the outer wall of the fastening housing; and a fixing ring, which is fixedly installed inside the fastening housing; the positioning sleeve is connected to the through port.

[0012] Preferably, a silicone rubber airbag is fixedly installed on the inner wall of the fixing ring, and a one-way air valve is provided on the outer wall of the silicone rubber airbag. The other end of the one-way air valve extends to the outer wall of the fastening housing through a positioning sleeve. An elastic sealing ring is fixedly installed on the outer wall of the silicone rubber airbag. An airbag septum is fixedly installed inside the silicone rubber airbag. An extended cavity is formed between the airbag septum and the silicone rubber airbag. Supporting air columns are fixedly installed circumferentially at equal intervals between the inner walls of the extended cavity. Air holes are formed circumferentially at equal intervals on the outer wall of the airbag septum. The supporting air columns are connected to the air holes.

[0013] The system incorporates a silicone rubber airbag, which, in conjunction with a one-way valve, provides a convenient and reliable inflation method for sealing operations. The one-way valve effectively controls the direction of gas injection, preventing backflow after inflation and ensuring the silicone rubber airbag maintains a stable expansion state after inflation. Simply injecting gas into the silicone rubber airbag via the one-way valve quickly inflates the airbag, making operation simple and efficient, eliminating the need for complex control steps and simplifying sealing preparation. This combination also ensures stability during inflation, preventing poor sealing due to gas leakage. The internal airbag septa and supporting air column enhance the structural stability of the inflated airbag. The septa rationally divide the internal space of the silicone rubber airbag, while the supporting air column expands after inflation, supporting the septa and ensuring uniform expansion of the silicone rubber airbag during inflation, preventing localized over-inflation or under-inflation. This uniform expansion ensures a tighter and more even fit between the silicone rubber airbag and the outer wall of the pipe, preventing seal failure caused by uneven local stress. It also enhances the pressure resistance of the silicone rubber airbag, making it less prone to damage during long-term use.

[0014] This utility model provides an adjustable-diameter exhaust pipe fastening assembly. It has the following advantages:

[0015] (1) Through the synergistic effect of related structures, this utility model can be adjusted according to the actual diameter of the exhaust pipe and connecting pipe. Regardless of the difference in pipe diameter, stable clamping can be achieved without the need for separate clamping components for different pipe diameters. It is suitable for various pipe connection scenarios. During the adjustment process, the components work together to generate a uniform and continuous clamping force, firmly fixing the pipe and preventing the pipe from loosening or shifting due to vibration, pressure changes, or other factors during the exhaust process. This stable clamping not only ensures the normal operation of the exhaust system.

[0016] (2) This utility model can achieve excellent sealing performance by inflating and sealing the part, effectively preventing exhaust leakage. Its core component will fit tightly against the outer wall of the pipe after inflation, and fill various gaps in the pipe connection by using its own elasticity and expansion force. This comprehensive and tight fitting method can adapt to the complex situation of pipe connection compared with traditional hard sealing, significantly improve the reliability of sealing, ensure that there will be no leakage during the transportation of exhaust, ensure the effective operation of the exhaust system, and have good adaptability. It can cope with different pipe diameters. Since it achieves sealing by inflation and expansion, it can be adjusted according to the actual pipe diameter within a certain range, without the need to customize sealing parts for specific pipe diameters. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a partial view of the rotating diameter-changing clamping part of this utility model;

[0019] Figure 3 This is a partial sectional view of the telescopic slide of this utility model;

[0020] Figure 4 This is a partial view of the inflatable sealing part of this utility model.

[0021] In the diagram: 1. Exhaust pipe, 2. Connecting pipe, 3. Rotating variable diameter clamping part, 311. Fastening housing, 312. Fixing block, 313. Clamping pad, 314. Through port, 315. Rotating block, 316. Rotating plate, 317. Threaded screw, 318. Rotating sleeve, 319. Telescopic slide cylinder, 3111. Rectangular limiting slide groove, 3112. Rectangular slider, 3113. Threaded sleeve, 3114. Telescopic slide rod, 4. Inflatable fitting sealing part, 411. One-way air valve, 412. Fixing ring, 413. Silicone rubber airbag, 414. Airbag septum, 415. Extended cavity, 416. Supporting air column, 417. Elastic sealing ring, 418. Positioning sleeve. Detailed Implementation

[0022] 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.

[0023] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] Example 1:

[0025] Addressing the problems of traditional exhaust pipe fastening assemblies, such as difficulty in adapting to pipes of different diameters, insufficient clamping stability, and poor sealing performance, this invention provides a preferred embodiment of an adjustable-diameter exhaust pipe fastening assembly, for example... Figure 1-4 As shown: An adjustable diameter exhaust pipe fastening assembly includes an exhaust pipe 1, a rotating diameter-changing clamping part 3, and an inflatable fitting and sealing part 4. One end of the exhaust pipe 1 is provided with a connecting pipe 2; the rotating diameter-changing clamping part 3 is provided on the outer wall of the exhaust pipe 1 and the connecting pipe 2; the inflatable fitting and sealing part 4 is movably sleeved on the outer wall of the exhaust pipe 1 and the connecting pipe 2 respectively.

[0026] The rotating diameter clamping part 3 specifically includes: a fastening housing 311, which is respectively disposed on the outer wall of the exhaust pipe 1 and the connecting pipe 2; a fixing block 312, which is circumferentially and equidistantly fixed on the outer wall of the fastening housing 311; and a through-hole 314, which is opened on the outer wall of the fastening housing 311.

[0027] The fixed block 312 has an installation groove, and a telescopic slide cylinder 319 is fixedly installed inside the installation groove. The inner wall of the telescopic slide cylinder 319 has rectangular limiting slide grooves 3111 symmetrically provided. The top outer wall of the telescopic slide cylinder 319 is connected to a rotating sleeve 318, and a telescopic slide rod 3114 is provided inside the telescopic slide cylinder 319.

[0028] A rectangular slider 3112 is symmetrically fixedly installed on the outer wall of the telescopic slide rod 3114. A threaded sleeve 3113 is connected to one end of the telescopic slide rod 3114. A threaded screw 317 is installed inside the telescopic slide cylinder 319. A rotating plate 316 is fixedly connected to the threaded screw 317 through a rotating sleeve 318. A rotating block 315 is fixedly installed on the top outer wall of the rotating plate 316.

[0029] The telescopic slide rod 3114 is threadedly connected to the threaded screw 317 via the threaded sleeve 3113. The telescopic slide rod 3114 is slidably installed inside the rectangular limiting slide groove 3111 via the rectangular slider 3112. The other end of the telescopic slide rod 3114 moves through the bottom of the inner wall of the telescopic slide cylinder 319 and extends into the interior of the fastening housing 311. A clamping pad 313 is fixedly installed at the other end of the telescopic slide rod 3114.

[0030] In this example, the rotating diameter-changing clamping part is initially fixed by adjusting the rotating block 315 in the rotating diameter-changing clamping part 3: rotating the rotating plate 316 and the threaded screw 317 connected to it causes them to rotate within the rotating sleeve 318; since the telescopic slide rod 3114 is threadedly connected to the threaded screw 317 through the threaded sleeve 3113, and the telescopic slide rod 3114 slides within the rectangular limiting groove 3111 of the telescopic slide cylinder 319 through the rectangular slider 3112, the rotation of the threaded screw 317 will cause the telescopic slide rod 3114 to move downward along the inner wall of the telescopic slide cylinder 319, thereby pushing the clamping pad. Block 313 moves closer to the outer wall of exhaust pipe 1 and connecting pipe 2 until the clamping pad 313 is tightly attached to the outer wall of the pipes, completing the initial clamping and fixing of the two pipes. This clamping mechanism can be adjusted according to the actual diameter of the exhaust pipe and connecting pipe, achieving stable clamping regardless of differences in pipe diameter. It eliminates the need for separate clamping components for different pipe diameters, making it suitable for various pipe connection scenarios. During adjustment, the components work together to generate a uniform and continuous clamping force, firmly fixing the pipes and preventing loosening or displacement due to vibration, pressure changes, or other factors during exhaust. This stable clamping not only ensures the normal operation of the exhaust system but also...

[0031] Example 2:

[0032] Based on Embodiment 1, a preferred embodiment of the adjustable-diameter exhaust pipe fastening assembly provided by this utility model is, for example... Figure 1-4 As shown: The inflatable sealing part 4 specifically includes: a positioning sleeve 418, which is fixedly installed on the outer wall of the fastening housing 311; a fixing ring 412, which is fixedly installed inside the fastening housing 311; the positioning sleeve 418 is connected to the through port 314.

[0033] A silicone rubber airbag 413 is fixedly installed on the inner wall of the fixing ring 412. A one-way air valve 411 is connected to the outer wall of the silicone rubber airbag 413. The other end of the one-way air valve 411 extends to the outer wall of the fastening housing 311 through the positioning sleeve 418. An elastic sealing ring 417 is fixedly installed on the outer wall of the silicone rubber airbag 413. An airbag septum 414 is fixedly installed inside the silicone rubber airbag 413. An extension cavity 415 is opened between the airbag septum 414 and the silicone rubber airbag 413. Supporting air columns 416 are fixedly installed circumferentially between the inner walls of the extension cavity 415. Air holes are opened circumferentially on the outer wall of the airbag septum 414. The supporting air columns 416 are connected to the air holes.

[0034] In this example, the inflation and sealing operation is as follows: inflation is performed through the one-way valve 411 extending from the inflation sealing part 4 to the outer wall of the fastening housing 311. Gas enters the silicone rubber airbag 413 through the positioning sleeve 418 and the port 314. Gas enters the extension cavity 415 through the air hole on the airbag septum 414, causing the supporting air column 416 to expand. The supporting air column 416 drives the silicone rubber airbag 413 to expand as a whole. At the same time, the elastic sealing ring 417 on the outer wall of the silicone rubber airbag 413 expands along with it until the elastic sealing ring 417 tightly adheres to the exhaust pipe 1 and the connection. On the outer wall of pipe 2 and at the connection points, the one-way valve 411 prevents gas backflow and maintains a sealed state. This comprehensive and tight fit, compared to traditional hard seals, can adapt to complex pipe connections, significantly improves the reliability of the seal, ensures that there is no leakage during exhaust transportation, guarantees the effective operation of the exhaust system, has good adaptability, and can cope with different pipe diameters. Since it achieves sealing through air expansion, it can be adjusted within a certain range according to the actual pipe diameter, without the need to customize sealing components for specific pipe diameters.

[0035] Working principle: All content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] Step 1: Install basic components: Align the corresponding connection ends of exhaust pipe 1 and connecting pipe 2, then put the fastening housing 311 in the rotating diameter clamping part 3 onto the outer wall of exhaust pipe 1 and connecting pipe 2 respectively, and at the same time, put the fixing ring 412 of the inflation fitting sealing part 4 onto the outer wall of exhaust pipe 1 and connecting pipe 2 respectively, to ensure that each component is initially in the ready-to-work position.

[0037] Step 2: Adjust the rotating diameter clamping part for initial fixation: Rotate the rotating block 315 in the rotating diameter clamping part 3 to drive the rotating plate 316 and the threaded rod 317 connected to it to rotate in the rotating sleeve 318; Since the telescopic slide rod 3114 is threadedly connected to the threaded rod 317 through the threaded sleeve 3113, and the telescopic slide rod 3114 slides in the rectangular limiting groove 3111 of the telescopic slide cylinder 319 through the rectangular slider 3112, the rotation of the threaded rod 317 will cause the telescopic slide rod 3114 to move downward along the inner wall of the telescopic slide cylinder 319, thereby pushing the clamping pad 313 closer to the outer wall of the exhaust pipe 1 and the connecting pipe 2, until the clamping pad 313 is tightly attached to the outer wall of the pipe, completing the initial clamping and fixation of the two pipes;

[0038] Step 3: Inflation and Sealing Operation: Inflation is performed through the one-way air valve 411 extending from the air-sealing part 4 to the outer wall of the fastening housing 311. Gas enters the silicone rubber airbag 413 through the positioning sleeve 418 and the port 314. Gas enters the extension cavity 415 through the air hole on the airbag septum 414, causing the supporting air column 416 to expand. The supporting air column 416 drives the silicone rubber airbag 413 to expand as a whole. At the same time, the elastic sealing ring 417 on the outer wall of the silicone rubber airbag 413 expands along with it until the elastic sealing ring 417 tightly adheres to the outer wall of the exhaust pipe 1 and the connecting pipe 2 and the connection part. The one-way air valve 411 will prevent gas backflow and maintain a sealed state.

[0039] Step 4: Inspection and Adjustment: Observe the clamping condition of the rotating diameter clamping part 3. If there is any looseness, the rotating block 315 can be rotated again to adjust the extension and retraction of the telescopic slide rod 3114 to ensure that the clamping is stable. At the same time, check the sealing effect of the air-filled sealing part 4. If there is any leakage, air can be added through the one-way air valve 411 until a good sealing state is achieved.

[0040] Step 5: Disassembly: First, release the gas in the silicone rubber airbag 413 through the one-way air valve 411, so that the elastic sealing ring 417 and the supporting air column 416 return to their original state and the sealing is released; then rotate the rotating block 315 in the opposite direction, so that the threaded screw 317 rotates in the opposite direction, so that the telescopic slide rod 3114 moves the clamping pad 313 away from the outer wall of the pipe. Then, remove the fastening housing 311 and the fixing ring 412 from the exhaust pipe 1 and the connecting pipe 2 to complete the disassembly.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable-diameter exhaust pipe fastening assembly, comprising an exhaust pipe (1), a rotating diameter-changing clamping part (3), and an inflatable fitting and sealing part (4), characterized in that: One end of the exhaust pipe (1) is provided with a connecting pipe (2); the rotating diameter clamping part (3) is provided on the outer wall of the exhaust pipe (1) and the connecting pipe (2); the inflatable fitting sealing part (4) is respectively movably sleeved on the outer wall of the exhaust pipe (1) and the connecting pipe (2).

2. The adjustable-diameter exhaust pipe fastening assembly according to claim 1, characterized in that: The rotating diameter-changing clamping part (3) specifically includes: The fastening housing (311) is respectively installed on the outer wall of the exhaust pipe (1) and the connecting pipe (2); The fixing block (312) is circumferentially and equidistantly fixed on the outer wall of the fastening housing (311); A through-hole (314) is provided on the outer wall of the fastening housing (311).

3. The adjustable-diameter exhaust pipe fastening assembly according to claim 2, characterized in that: The fixing block (312) has an installation groove, and a telescopic slide cylinder (319) is fixedly installed inside the installation groove. The inner wall of the telescopic slide cylinder (319) has rectangular limiting slide grooves (3111) symmetrically provided. The top outer wall of the telescopic slide cylinder (319) is connected to a rotating sleeve (318), and a telescopic slide rod (3114) is provided inside the telescopic slide cylinder (319).

4. The adjustable-diameter exhaust pipe fastening assembly according to claim 3, characterized in that: A rectangular slider (3112) is symmetrically fixedly installed on the outer wall of the telescopic slide rod (3114). A threaded sleeve (3113) is connected to one end of the telescopic slide rod (3114). A threaded screw (317) is provided inside the telescopic slide cylinder (319). A rotating plate (316) is fixedly connected to the threaded screw (317) through a rotating sleeve (318). A rotating block (315) is fixedly installed on the top outer wall of the rotating plate (316).

5. The adjustable-diameter exhaust pipe fastening assembly according to claim 4, characterized in that: The telescopic slide rod (3114) is threadedly connected to the threaded screw (317) via a threaded sleeve (3113). The telescopic slide rod (3114) is slidably installed inside the rectangular limiting slide groove (3111) via a rectangular slider (3112). The other end of the telescopic slide rod (3114) moves through the bottom of the inner wall of the telescopic slide cylinder (319) and extends into the interior of the fastening housing (311). A clamping pad (313) is fixedly installed at the other end of the telescopic slide rod (3114).

6. The adjustable-diameter exhaust pipe fastening assembly according to claim 1, characterized in that: The inflatable sealing part (4) specifically includes: The positioning sleeve (418) is fixedly installed on the outer wall of the fastening housing (311); A retaining ring (412) is fixedly installed inside the fastening housing (311); The positioning sleeve (418) is connected to the through port (314).

7. The adjustable-diameter exhaust pipe fastening assembly according to claim 6, characterized in that: A silicone rubber airbag (413) is fixedly installed on the inner wall of the fixing ring (412). A one-way air valve (411) is connected to the outer wall of the silicone rubber airbag (413). The other end of the one-way air valve (411) extends to the outer wall of the fastening housing (311) through the positioning sleeve (418). An elastic sealing ring (417) is fixedly installed on the outer wall of the silicone rubber airbag (413). An airbag septum (414) is fixedly installed inside the silicone rubber airbag (413). An extension cavity (415) is opened between the airbag septum (414) and the silicone rubber airbag (413). Supporting air columns (416) are fixedly installed circumferentially between the inner walls of the extension cavity (415). Air holes are opened circumferentially on the outer wall of the airbag septum (414). The supporting air columns (416) are connected to the air holes.

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