Stretchable and adjustable warm air pipe

Abstract

The utility model discloses a telescopic adjustable warm air pipe, which comprises an inner pipeline and an outer pipeline, one end of the inner pipeline is inserted in the outer pipeline through an adjusting mechanism, the adjusting mechanism comprises a fixed ring, a sliding ring and a screw rod, the fixed ring is fixed on the inner wall of the outer pipeline, the sliding ring is arranged in a limiting groove arranged on the outer side of the inner pipeline, and the screw rod is fixed on the inner wall of the outer pipeline. The threaded rod penetrates through a threaded hole in the side face of the fixing ring to be movably connected with the sliding ring, a sealing ring is arranged at the end of the inner pipeline, and a hoop with adjustable tightness is arranged in a tightening groove in the outer side of the outer pipeline. The telescopic warm air pipe is scientific and reasonable in structural design, telescopic adjustment of the inner pipe in the outer pipe is achieved, the problems that a traditional warm air pipe is fixed in length and complex in adjusting structure are solved, operation is easy and convenient, the adjusting precision is controllable, a double-sealing structure is formed, the problem that air leaks easily at the joint of an existing warm air pipe is solved, and it is ensured that no leakage exists in the warm air conveying process.

Description

Technical Field

[0001] This utility model relates to the field of heating pipe technology, specifically a retractable and adjustable heating pipe. Background Technology

[0002] Heated air ducts are widely used in industrial production and daily life, such as for heating workshops, warehouses, and greenhouses in winter, or in equipment requiring hot air delivery. Currently, most existing heated air ducts have fixed structures and non-adjustable lengths. This necessitates preparing ducts of different lengths for different applications, increasing costs and causing inconvenience. Furthermore, some adjustable-length heated air ducts have complex adjustment mechanisms, are difficult to operate, and are prone to loosening and air leakage after adjustment, affecting their performance and lifespan. Therefore, there is an urgent need for a heated air duct that is simple in structure, easy to adjust, can stably extend and retract, and has good sealing performance. To this end, we propose a telescopic and adjustable heated air duct. Utility Model Content

[0003] The purpose of this invention is to provide a retractable and adjustable heating duct to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a retractable and adjustable heating pipe, comprising an inner pipe and an outer pipe, one end of the inner pipe being inserted into the outer pipe via an adjustment mechanism, the adjustment mechanism comprising a fixed ring, a sliding ring, and a screw, the fixed ring being fixed to the inner wall of the outer pipe, the sliding ring being installed in a limiting groove opened on the outer side of the inner pipe, the screw passing through a threaded hole on the side of the fixed ring and being movably connected to the sliding ring, a sealing ring being provided at the end of the inner pipe, and an adjustable clamp being provided in a tightening groove on the outer side of the outer pipe.

[0005] In the above scheme, a knob is provided at one end of the screw.

[0006] In the above scheme, guide holes are provided on the sides of the fixed ring and the sliding ring respectively, and a guide rod is movably inserted into the guide hole. The guide rod is arranged parallel to the screw.

[0007] In the above scheme, both the outer surface of the inner pipe and the inner surface of the outer pipe are provided with anti-slip textures.

[0008] In the above scheme, the outer wall of the sealing ring is tightly attached to the inner wall of the outer pipe.

[0009] In the above scheme, the sealing ring is a rubber ring.

[0010] In the above scheme, the clamp has relief grooves on both sides of the opening end, and bolt assemblies that can adjust the opening size are provided in the relief grooves.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This telescopic adjustable heating pipe has a simple and reasonable structural design and strong practicality. Based on the cooperation between the inner pipe outer limiting groove and the sliding ring, the screw passes through the threaded hole of the fixed ring and is movably connected to the sliding ring. By rotating the knob, the screw is driven to rotate, which drives the sliding ring to slide axially in the inner pipe limiting groove, realizing the telescopic adjustment of the inner pipe in the outer pipe. This solves the problems of fixed length and complex adjustment structure of traditional heating pipes. It is easy to operate and the adjustment accuracy is controllable. The guide rod set in the guide hole corresponding to the side of the fixed ring and the sliding ring is parallel to the screw, which restricts the rotation of the sliding ring and provides sliding guidance, avoiding radial displacement of the inner pipe during the adjustment process, ensuring a smooth telescopic process, and improving the stability of the adjustment mechanism. The outer wall of the sealing ring at the end of the inner pipe is tightly attached to the inner wall of the outer pipe. Combined with the clamp and bolt assembly in the tightening groove on the outer side of the outer pipe, the clamp is tightened by adjusting the bolt assembly, which applies radial pressure to the sealing ring to form a double sealing structure. This solves the problem of easy air leakage at the connection of existing heating pipes and ensures that there is no leakage during the heating air delivery process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the inner and outer pipes of this utility model.

[0013] Figure 2 This is a schematic diagram of the external structure of the internal pipe of this utility model.

[0014] Figure 3 This is a schematic diagram of the clamp structure of this utility model.

[0015] In the diagram: 1. Inner pipe; 2. Outer pipe; 3. Fixing ring; 4. Sliding ring; 5. Screw; 6. Knob; 7. Sealing ring; 8. Anti-slip texture; 9. Guide rod; 10. Limiting groove; 11. Tightening groove; 12. Clamp; 13. Leaving groove; 14. Bolt assembly. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-3This utility model provides a technical solution: a retractable and adjustable heating pipe, including an inner pipe 1 and an outer pipe 2. One end of the inner pipe 1 is inserted into the outer pipe 2 through an adjustment mechanism. The adjustment mechanism includes a fixing ring 3, a sliding ring 4, and a screw 5. The fixing ring 3 is fixed to the inner wall of the outer pipe 2. The sliding ring 4 is installed in a limiting groove 10 opened on the outer side of the inner pipe 1. The screw 5 passes through a threaded hole on the side of the fixing ring 3 and is movably connected to the sliding ring 4. A sealing ring 7 is provided at the end of the inner pipe 1. An adjustable clamp 12 is provided in the tightening groove 11 on the outer side of the outer pipe 2.

[0018] The inner pipe 1 and the outer pipe 2 are connected by an adjustment mechanism. The fixing ring 3 is fixed to the inner wall of the outer pipe 2, providing a stable support base for the adjustment mechanism. The sliding ring 4 is embedded in the limiting groove 10 of the inner pipe 1, and can slide axially along the limiting groove 10 but cannot rotate circumferentially, ensuring that the expansion and contraction of the inner pipe 1 is precisely guided.

[0019] The screw 5 passes through the threaded hole of the fixed ring 3 and is movably connected to the sliding ring 4 (e.g., through a bearing or hinge structure) to form a "screw-nut" transmission structure: when the screw 5 rotates, due to the restriction of the threaded hole of the fixed ring 3, the rotational motion of the screw 5 is converted into axial linear motion, which drives the sliding ring 4 to move along the limiting groove 10, thereby pushing the inner pipe 1 to expand and contract within the outer pipe 2.

[0020] The sealing ring 7 at the end of the inner pipe 1 fits against the inner side of the outer pipe 2. The clamp 12 on the outer side of the outer pipe 2 can apply radial pressure to the sealing ring 7 through the tightening groove 11, forming a double sealing structure of "sealing ring + clamp", which solves the problem of easy air leakage at the connection of traditional heating pipes and improves the sealing reliability.

[0021] By limiting circumferential rotation through the cooperation of the limiting groove 10 and the sliding ring 4, and axial adjustment through the threaded transmission of the screw 5 and the fixed ring 3, combined with the double sealing design of the sealing ring 7 and the clamp 12, the heating pipe can be conveniently extended and retracted, and the high airtightness of the connection can be ensured, thus solving the core problems of complex adjustment and air leakage of existing heating pipes.

[0022] In the above scheme, a knob 6 is provided at one end of the screw 5. The knob 6 is fixedly connected to the screw 5 (e.g., by welding or keying) and serves as an actuator for manual operation. The outer diameter of the knob 6 is larger than that of the screw 5, and its surface may be provided with anti-slip textures or protrusions to facilitate the user's application of force to rotate it.

[0023] In the above scheme, guide holes are correspondingly provided on the sides of the fixed ring 3 and the sliding ring 4, and a guide rod 9 is movably inserted into the guide holes. The guide rod 9 is arranged parallel to the screw 5. The two ends of the guide rod 9 pass through the guide holes of the fixed ring 3 and the sliding ring 4 respectively, and are arranged parallel to the screw 5. The diameter of the guide rod 9 is slightly smaller than the inner diameter of the guide hole, allowing the sliding ring 4 to slide axially along the guide rod 9, but restricting its circumferential rotation and radial offset.

[0024] The guide rod 9 and the screw 5 form a "double-track guide" structure, which ensures that the sliding ring 4 remains stable during movement and avoids tilting or jamming caused by the screw 5 being subjected to force alone. This improves the stability and service life of the adjustment mechanism and solves the problems of easy shaking and jamming in traditional telescopic structures.

[0025] In the above scheme, both the outer surface of the inner pipe 1 and the inner surface of the outer pipe 2 are provided with anti-slip textures 8. The anti-slip textures 8 can be alternating stripes, grids, or granular structures, which increase the friction between the inner and outer pipes by increasing the roughness of the contact surfaces.

[0026] The anti-slip texture 8 ensures that after the inner pipe 1 slides into place within the outer pipe 2, it is not prone to self-slipping due to external vibration or heating air pressure, thus ensuring the stability of the adjusted length and solving the problem of easy loosening and unstable length of traditional heating pipes after adjustment.

[0027] In the above scheme, the outer wall of the sealing ring 7 is tightly attached to the inner wall of the outer pipe 2. The outer diameter of the sealing ring 7 is slightly larger than the outer diameter of the inner pipe 1. After installation, it fits tightly to the inner wall of the outer pipe 2 through an interference fit, forming an initial seal. Its cross-section can be rectangular, O-shaped, or lip-shaped, etc., and it uses elastic deformation to fill the gap between the inner and outer pipes.

[0028] In the above scheme, the sealing ring 7 is a rubber ring. Rubber rings have good elasticity, temperature resistance and aging resistance, can adapt to temperature changes (such as 60-120℃) during the warm air delivery process, and have low material cost and are easy to process and mold.

[0029] In the above scheme, the clamp 12 has relief grooves 13 on both sides of its open end, and bolt assemblies 14 that can adjust the opening size are installed in the relief grooves 13. The clamp 12 has a semi-circular structure and is fitted into the tightening groove 11 of the outer pipe 2. The relief grooves 13 at the open end provide installation space for the bolt assembly 14 (including bolts, nuts, and washers). When the bolts are rotated, the open ends of the clamp 12 can be pulled closer together, thereby applying radial pressure to the sealing ring 7.

[0030] Working principle:

[0031] When the extendable and adjustable heating duct needs to be extended, rotating the knob 6 clockwise will cause the screw 5 to rotate synchronously. Since the threaded hole of the fixing ring 3 and the screw 5 form a threaded pair, the rotational motion of the screw 5 is converted into linear motion along the axial direction (the direction of the inner pipe 1 axis), which drives the sliding ring 4 to move away from the fixing ring 3.

[0032] The sliding ring 4 is embedded in the limiting groove 10 of the inner pipe 1. Its movement pushes the inner pipe 1 to extend from the outer pipe 2 until it reaches the required length; conversely, rotating the knob 6 counterclockwise causes the sliding ring 4 to drive the inner pipe 1 to retract into the outer pipe 2.

[0033] The guide rod 9 passes through the guide hole of the fixed ring 3 and the sliding ring 4, restricting the circumferential rotation of the sliding ring 4 and ensuring that it moves only along the axial direction of the screw 5, so that the expansion and contraction process of the inner pipe 1 is smooth and without deviation.

[0034] Sealing principle:

[0035] Initial sealing: The rubber sealing ring 7 at the end of the inner pipe 1 fits tightly against the inner wall of the outer pipe 2 through an interference fit, and uses the elasticity of the material to fill the gap, forming the first sealing barrier and blocking the path of warm air leakage along the pipe gap.

[0036] Dynamic sealing enhancement: When higher sealing requirements are required (such as in high-pressure air supply scenarios), the opening size of the clamp 12 is adjusted by the bolt assembly 14. The clamp 12 tightens the tightening groove 11 of the outer pipe 2, applying radial pressure to the sealing ring 7, causing it to expand further and fit tightly against the inner wall of the outer pipe 2, forming a second sealing barrier.

[0037] The dual-sealing structure, combined with the properties of elastic materials, can adapt to the deformation caused by the thermal expansion and contraction of the pipeline, ensuring good sealing performance under different operating conditions.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A retractable and adjustable heating duct, comprising an inner duct (1) and an outer duct (2), characterized in that: One end of the inner pipe (1) is inserted into the outer pipe (2) through an adjustment mechanism. The adjustment mechanism includes a fixed ring (3), a sliding ring (4) and a screw (5). The fixed ring (3) is fixed to the inner wall of the outer pipe (2). The sliding ring (4) is installed in the limiting groove (10) opened on the outside of the inner pipe (1). The screw (5) passes through the threaded hole on the side of the fixed ring (3) and is movably connected to the sliding ring (4). A sealing ring (7) is provided at the end of the inner pipe (1). An adjustable clamp (12) is provided in the tightening groove (11) on the outside of the outer pipe (2).

2. The retractable and adjustable heating duct according to claim 1, characterized in that: A knob (6) is provided at one end of the screw (5).

3. The retractable and adjustable heating duct according to claim 1, characterized in that: The fixed ring (3) and the sliding ring (4) have corresponding guide holes on their sides, and a guide rod (9) is movably inserted into the guide hole. The guide rod (9) is arranged parallel to the screw (5).

4. The retractable and adjustable heating duct according to claim 1, characterized in that: The outer surface of the inner pipe (1) and the inner surface of the outer pipe (2) are both provided with anti-slip textures (8).

5. The retractable and adjustable heating duct according to claim 1, characterized in that: The outer wall of the sealing ring (7) is tightly attached to the inner wall of the outer pipe (2).

6. The retractable and adjustable heating duct according to claim 1, characterized in that: The sealing ring (7) is a rubber ring.

7. The retractable and adjustable heating duct according to claim 1, characterized in that: The clamp (12) has relief grooves (13) on both sides of the opening end, and the relief grooves (13) are provided with bolt assemblies (14) that can adjust the size of the opening.

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