Heating and ventilation pipeline sealing and connecting device

Abstract

The invention provides a heating and ventilation pipeline sealing connection device which comprises a pipe body fixing frame used for fixing two pipe bodies, a sleeve assembly arranged at the butt joint position of the two pipe bodies in a sleeving mode and a fastening assembly arranged on the outer side of the sleeve assembly in a sleeving mode, and the sleeve assembly comprises an inner pipe with the inner side wrapping the joint of the two pipe bodies and an outer pipe arranged on the outer side of the inner pipe in a sleeving mode. The sleeve assembly comprises an outer pipe and a plurality of fasteners movably arranged on the outer pipe in a surrounding mode, the surrounding edge of the butt joint end of the pipe bodies extends outwards to form a pipe groove used for driving the fasteners to be opened and closed, the two pipe bodies are driven by a pipe body fixing frame to move close to or away from the sleeve assembly in the axial opposite position, and in the process, the fasteners on the outer pipe are turned open, so that the two pipe bodies are fixed. The buckling block is arranged on a moving path of the pipe body embedded into the inner pipe, in the continuous embedding process of the pipe body, the pipe groove in the pipe body abuts against the bottom support and is directly triggered, the buckling block moves towards the inner side of the outer pipe in the process, the butt joint path of the pipe body is limited, stable butt joint is ensured, coaxial butt joint is achieved, the operation mode is simple, and the assembly precision is high.

Description

Technical Field

[0001] This invention relates to the field of HVAC duct sealing technology, and in particular to a sealing connection device for HVAC ducts. Background Technology

[0002] In environments such as chemical laboratories, biological laboratories, or hospital isolation wards, exhaust systems are often used to transport media containing harmful substances. These exhaust systems typically need to operate for extended periods, and the pipes often pass through complex spaces such as ceilings, mezzanines, and pipe corridors. If the seals at the interfaces fail, harmful gases can easily escape or pollution can spread, leading to risks of personnel exposure, environmental compliance, and production stoppages. Therefore, the reliability and maintainability of the interface seals are particularly critical.

[0003] Currently, exhaust duct connections often employ flange + gasket, clamp-type connections, and sleeve insertion + sealing ring structures. While these connection methods meet basic assembly requirements, they still have some shortcomings. The installation process heavily relies on manual experience; for example, when joining two pipe sections, ensuring coaxiality and the correct insertion depth is difficult and often requires repeated measurements and confirmation, resulting in low construction efficiency. Furthermore, if the insertion is incomplete or eccentric, the sealing ring is susceptible to hidden damage from shearing or compression, affecting the duct's airtightness. Summary of the Invention

[0004] Based on this, the purpose of this invention is to provide a sealing connection device for HVAC pipes, so as to fundamentally solve the problem that current HVAC pipe sealing connection devices cannot guarantee the coaxiality of pipes during connection and the depth of insertion during the insertion process, resulting in pipe installation eccentricity affecting pipe airtightness.

[0005] According to an embodiment of the present invention, a sealing connection device for HVAC pipes includes a pipe fixing bracket for fixing two pipes, a sleeve assembly sleeved at the joint of the two pipes, and a fastening assembly sleeved on the outside of the sleeve assembly. The sleeve assembly includes an inner tube that wraps around the connection between the two tube bodies, an outer tube that is sleeved on the outside of the inner tube, and a plurality of fasteners that are movably arranged on the outer tube in a surrounding manner. The perimeter of the tube body joint extends outward to form a tube groove for driving the fasteners to open and close. The two tubes are driven to move axially relative to each other towards or away from the sleeve assembly by the tube fixing frame, and after the tubes are inserted into place, the fastener is triggered to perform a ring-shaped fastening at the edge of the tube.

[0006] Furthermore, the tube fixing frame includes a slide rod, at least two fastening rings for fixing the tube body that are slidably disposed along the trajectory of the slide rod, a second bolt for fixing the fastening rings, and a driving component that is pulsatorically connected to the side of the fastening rings away from the slide rod.

[0007] Furthermore, the driving component includes a bidirectional lead screw for driving the two fastening rings to move toward each other in a direction that is relatively close or far apart, and an adjusting handle extending outward along one side of the axial direction of the bidirectional lead screw.

[0008] Furthermore, the sleeve assembly also includes a reinforcing ring extending outward from the outer tube perimeter for adapting to the fastening assembly. The outer tube has multiple assembly slots for accommodating the fastener. Each assembly slot has at least two slots and brackets for accommodating the fastener. A sealing layer is embedded inside the assembly slot, and the sealing layer abuts against the fastener after it is fastened.

[0009] Furthermore, the fastener includes a fastening block extending outward from the side near the pipe body for fastening the pipe groove, a rotating block disposed on the side of the fastener away from the fastening block and connected to the assembly groove, a base support disposed near one end of the rotating block, and a locking block extending outward from the side of the base support away from the fastening block.

[0010] Furthermore, the locking block is adapted to the locking slot, the bracket is adapted to the base support, and after the fastener flips and closes, the locking block is inserted into the locking slot, the bracket is inserted into the base support, and abuts against the sealing layer.

[0011] Furthermore, the fastening assembly includes an upper fastening clamp and a lower fastening clamp sleeved on the outer surface of the sleeve assembly, and an adhesive injection assembly fixedly disposed on the outer surface of the upper fastening clamp, wherein the inner structures of the upper fastening clamp and the lower fastening clamp are disposed opposite to each other.

[0012] Furthermore, the upper fastening clamp includes a sealing ring on the inner side that is adapted to the outer surface of the outer tube, and a reinforcing groove located in the middle of the sealing ring and recessed, which is adapted to the outer surface of the reinforcing ring.

[0013] Furthermore, the upper and lower fastening clamps each extend outward to form end tubes that are sleeved on the outer surface of the tube body. The end tubes include glue injection grooves that are respectively opened between the upper and lower fastening clamps, and the glue injection grooves are connected to the glue injection assembly.

[0014] Furthermore, the glue injection assembly includes a heat insulation box fixedly connected to the upper fastening clamp, a glue storage tank opened in the heat insulation box for accommodating the sealant, miniature clamp valves disposed on both sides of the bottom of the glue storage tank, and a micro differential pressure sensor embedded in the glue injection tank and electrically connected to the miniature clamp valves. The two ends of the miniature clamp valves are respectively connected to the glue injection tank and the glue storage tank.

[0015] Compared with the prior art, the HVAC pipe sealing connection device in the above embodiments of the present invention drives the two pipes to move axially relative to each other towards or away from the sleeve assembly through the pipe fixing frame. During the process, the fastener on the outer pipe is flipped open and placed on the movement path of the pipe body embedded in the inner pipe. During the continuous embedding of the pipe body, the pipe groove on the pipe body abuts against the bottom support and is directly triggered. During the process, the fastening block moves towards the inside of the outer pipe to limit the docking path of the pipe body, ensuring stable docking and achieving coaxial docking. After the pipe body is inserted into place, the fastener is triggered to perform a ring-shaped fastening at the edge of the pipe body. The operation method is simple and the assembly accuracy is high. It solves the problem that the current HVAC pipe sealing connection device cannot guarantee the coaxiality of the pipe docking and the depth of insertion during the insertion process, resulting in pipe installation eccentricity affecting the pipe sealing performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the HVAC duct sealing connection device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the unfolded structure of the HVAC duct sealing connection device in an embodiment of the present invention; Figure 3 This is a partial structural diagram of the upper fastening clamp in the HVAC duct sealing connection device according to an embodiment of the present invention; Figure 4 This is a partial structural diagram of the glue injection component in the HVAC duct sealing connection device according to an embodiment of the present invention; Figure 5 This is a partial structural diagram of the sleeve assembly in the HVAC duct sealing connection device according to an embodiment of the present invention; Figure 6 This is an enlarged structural diagram of point A in the HVAC duct sealing connection device in an embodiment of the present invention; Figure 7 This is a partial unfolded structural diagram of the pipe body and sleeve assembly in the HVAC duct sealing connection device according to an embodiment of the present invention.

[0017] Explanation of key component symbols:

[0018] The following detailed description of the embodiments will further illustrate the present invention in conjunction with the above-described accompanying drawings. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] Example Please see Figures 1 to 7 The image shows a sealing connection device for HVAC pipes in an embodiment of the present invention. It includes a pipe fixing bracket for fixing two pipe bodies 1, a sleeve assembly sleeved at the joint of the two pipe bodies 1, and a fastening assembly sleeved on the outside of the sleeve assembly. The sleeve assembly includes an inner pipe 412 that wraps around the joint of the two pipe bodies 1, an outer pipe 411 sleeved on the outside of the inner pipe 412, and a plurality of fasteners 414 movably arranged on the outer pipe 411 in a surrounding arrangement. The perimeter of the joint of the pipe bodies 1 extends outward to form a pipe groove 413 for driving the fasteners 414 to open and close. The pipe fixing bracket drives the two pipe bodies 1 to move axially relative to each other toward or away from the sleeve assembly, and after the pipe bodies 1 are inserted into place, the fasteners 414 are triggered to perform a ring-shaped fastening at the perimeter of the pipe bodies.

[0023] Furthermore, the pipe fixing bracket includes a slide rod 511, at least two fastening rings 513 for fixing the pipe body 1 that slide along the trajectory of the slide rod 511, a second bolt 514 for fixing the fastening rings 513, and a driving component that is pulsatorically connected to the side of the fastening rings 513 away from the slide rod 511. The driving component includes a bidirectional lead screw 512 for driving the two fastening rings 513 to move in a direction that is relatively closer or farther away, and an adjusting handle 515 extending outward along one side of the axial direction of the bidirectional lead screw 512. The sleeve assembly also includes a reinforcing ring 431 extending outward along the periphery of the outer tube 411 for adapting to the fastening assembly. The outer tube 411 has multiple mounting slots 415 for accommodating the fasteners 414. At least two slots 423 and brackets 425 for accommodating fasteners 414 are provided inside the mounting groove 415. A sealing layer 419 is embedded inside the mounting groove 415, and the sealing layer 419 abuts against the fastener 414 after fastening. The fastener 414 includes a fastening block 416 extending outward from the side near the pipe body 1 for fastening the pipe groove 413, a rotating block 421 disposed on the side of the fastener 414 away from the fastening block 416 and connected to the mounting groove 415, a base support 417 disposed near one end of the rotating block 421, and a locking block 422 extending outward from the side of the base support 417 away from the fastening block 416. The locking block 422 is adapted to the slot 423, and the bracket 425 is adapted to the base support 417. After flipping and closing, the locking block 422 is inserted into the locking groove 423, and the bracket 425 is inserted into the bottom bracket 417 and abuts against the sealing layer 419. The fastening assembly includes an upper fastening clip 211 and a lower fastening clip 212 sleeved on the outer surface of the sleeve assembly. The upper fastening clip 211 and the lower fastening clip 212 are fastened together by a first bolt 213. An adhesive injection assembly is fixedly installed on the outer surface of the upper fastening clip 211. The inner structures of the upper fastening clip 211 and the lower fastening clip 212 are arranged opposite to each other. The upper fastening clip 211 includes a sealing ring 433 that is adapted to the outer surface of the outer tube 211 and a reinforcing groove 432 that is recessed in the middle of the sealing ring 433 and adapted to the outer surface of the reinforcing ring 431. Both ends of the fastening clamp 211 and the lower fastening clamp 212 extend outward to form end tubes 311 that are sleeved on the outer surface of the tube body 1. The end tubes 311 include glue injection grooves 312 that are respectively opened between the upper fastening clamp 211 and the lower fastening clamp 212. The glue injection grooves 312 are connected to the glue injection assembly. The glue injection assembly includes a heat insulation box 3 that is fixedly connected to the upper fastening clamp 211, a glue storage tank 313 opened in the heat insulation box 3 for containing sealant, a miniature clamp valve 314 that is set on both sides of the bottom of the glue storage tank 313, and a micro differential pressure sensor 315 that is embedded in the glue injection groove 312 and electrically connected to the miniature clamp valve 314. The two ends of the miniature clamp valve 314 are respectively connected to the glue injection groove 312 and the glue storage tank 313.

[0024] In practice, the operator can first fix the pipe bodies 1 to be connected onto the two fastening rings 513, and then fix them by adjusting the second bolt 514, completing the initial alignment and fixation of the pipe bodies 1 before connection. Next, the operator can place the sleeve assembly between the two pipe bodies 1, and then rotate the adjusting handle 515. The adjusting handle 515 drives the bidirectional lead screw 512 to rotate axially, causing the fastening ring 513, which is threaded with it, to move closer to or further away from the opposite direction. During this process, the fastening ring 513 drives the pipe body 1 towards the middle sleeve assembly. Before this, the operator also needs to open the fastener 414 on the outer pipe 411, presenting the following... Figure 7 As shown in the diagram, the base 417 in this state is positioned on the path where the tube 1 is embedded into the inner tube 412. During the continuous embedding of the tube 1, the groove 413 on the tube 1 abuts against the base 417 and is directly triggered, causing the fastener 414 to rotate around the rotating block 421. During this process, the fastening block 416 moves towards the inside of the outer tube 411 and finally engages at the end of the groove 413, thus limiting the position of the tube 1. It should be noted that when the tube 1 is in position, its positional relationship with the outer tube 411 and the inner tube 412 is as follows: the tube 1 is fitted around the inner tube 412, and the outer tube 411 is fitted onto the outer surface of the tube 1. A space for accommodating the tube 1 is provided between the outer tube 411 and the inner tube 412. Figure 5 As shown, a connecting pipe 418 is provided at the end, i.e., where the pipe body 1 is in place, and a fastener 414 is provided in the accommodating space. In addition, to ensure the stability of the pipe body 1 after assembly, such as to prevent the fastener 414 from coming off after fastening, this application is also provided with a corresponding snap-fit ​​structure for the fastener 414. The snap-fit ​​block 422 on the fastener 414 can be snapped with the snap-fit ​​groove 423 after the fastener 414 is fully embedded in the assembly groove 415, so as to ensure the stability of the fastener 414. At the same time, the sealing layer 419 and the sealing plate 424 provided in the assembly groove 415 can effectively ensure that the fastener 414 abuts against its outer surface after closing, and can also cover the entire accommodating space to achieve the sealing treatment at the fastener 414, as well as the airtightness between the pipe body 1 and the outer pipe 411 and the inner pipe 412. In some optional embodiments, the sealing layer 419 and the sealing plate 424 can be made of rubber with good sealing effect, but are not limited to.

[0025] Furthermore, after the initial connection between the pipe body 1 and the sleeve assembly is completed, a fastening component can be added to the outer surface of the sleeve assembly. Specifically, the operator can follow the track of the reinforcing ring 431 on the outer pipe 411 and sequentially fit the upper fastening clamp 211 and the lower fastening clamp 212 onto the outer surface of the outer pipe 411, and lock them with the first bolt 213. During the process, the glue injection component is always directly above the pipe body 1, and the end pipe 311 is directly sleeved on the outer surface of the pipe body 1, achieving a complete wrapping installation of the pipe body 1 and the sleeve assembly. Afterwards, the differential pressure sensor 315 acquires the differential pressure airtightness value at the glue injection groove 312. It can be understood that if air leakage occurs at the connection of the pipe body 1, The leakage only exists at the edge of the surface of the tube body 1. Therefore, the current sealing status of the tube body 1 can be obtained through the differential pressure sensor 315. When the differential pressure airtightness value exceeds the threshold, the micro clamp valve 314 is directly controlled to extract the sealant in the glue storage tank 313 and discharge it to the glue injection tank 312 along the glue delivery pipe 316. It can be understood that the sealant can be injected and sealed along the outer edge of the tube body 1 to prevent the tube body 1 from continuously leaking and waiting for maintenance personnel to arrive. In some optional embodiments of the present invention, a resistance heater can also be provided in the glue storage tank 313 to heat the sealant in the glue storage tank 313 after the glue is discharged to ensure its fluidity.

[0026] Finally, after the fastening components are assembled, the operator can directly remove the pipe fixing bracket for use as an auxiliary tool for docking other pipes 1.

[0027] In summary, the HVAC pipe sealing connection device in the above embodiments of the present invention drives the two pipe bodies 1 to move axially relative to each other towards or away from the sleeve assembly through the pipe body fixing frame. During the process, the fastener 414 on the outer pipe 411 is flipped open and placed on the moving path of the pipe body 1 embedded in the inner pipe 412. During the continuous embedding of the pipe body 1, the pipe groove 413 on the pipe body 1 abuts against the bottom support 417 and is directly triggered, causing the fastener 414 to rotate around the rotating block 421 as the center. During the process, the fastening block 416 moves towards the inside of the outer pipe 411 to limit the docking path of the pipe body 1, ensuring stable docking and achieving coaxial docking. After the pipe body 1 is inserted into place, the fastener 414 is triggered to perform a ring-shaped fastening at the edge of the pipe body. The operation method is simple and the assembly accuracy is high. It solves the problem that the current HVAC pipe sealing connection device cannot guarantee the coaxiality of the pipe docking and the depth of insertion during the insertion process, which leads to the pipe installation being eccentric and affecting the pipe sealing performance.

[0028] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A sealing connection device for HVAC pipes, characterized in that, It includes a pipe fixing bracket for fixing the two pipes, a sleeve assembly sleeved at the joint of the two pipes, and a fastening assembly sleeved on the outside of the sleeve assembly; The sleeve assembly includes an inner tube that wraps around the connection between the two tube bodies, an outer tube that is sleeved on the outside of the inner tube, and a plurality of fasteners that are movably arranged on the outer tube in a surrounding manner. The perimeter of the tube body joint extends outward to form a tube groove for driving the fasteners to open and close. The two tubes are driven to move axially relative to each other towards or away from the sleeve assembly by the tube fixing frame, and after the tubes are inserted into place, the fastener is triggered to perform a ring-shaped fastening at the edge of the tube.

2. The HVAC duct sealing connection device according to claim 1, characterized in that, The tube fixing frame includes a slide rod, at least two fastening rings for fixing the tube body that are slidably disposed along the trajectory of the slide rod, a second bolt for fixing the fastening rings, and a driving component that is pulsatorically connected to the side of the fastening rings away from the slide rod.

3. The HVAC duct sealing connection device according to claim 2, characterized in that, The driving component includes a bidirectional lead screw for driving the two fastening rings to move toward each other or away from each other, and an adjustment handle extending outward along one side of the axial direction of the bidirectional lead screw.

4. The HVAC duct sealing connection device according to claim 2, characterized in that, The sleeve assembly also includes a reinforcing ring extending outward from the outer tube edge for fitting the fastening assembly. The outer tube has multiple assembly slots for accommodating the fastener. Each assembly slot has at least two slots and brackets for accommodating the fastener. A sealing layer is embedded inside the assembly slot, and the sealing layer abuts against the fastener after it is fastened.

5. The HVAC duct sealing connection device according to claim 3, characterized in that, The fastener includes a fastening block extending outward from the side near the pipe body for fastening the pipe groove, a rotating block disposed on the side of the fastener away from the fastening block and connected to the assembly groove, a base support disposed near one end of the rotating block, and a locking block extending outward from the side of the base support away from the fastening block.

6. The HVAC duct sealing connection device according to claim 5, characterized in that, The locking block is adapted to the locking slot, the bracket is adapted to the base, and after the fastener flips and closes, the locking block is inserted into the locking slot, the bracket is inserted into the base, and abuts against the sealing layer.

7. The HVAC duct sealing connection device according to claim 6, characterized in that, The fastening assembly includes an upper fastening clamp and a lower fastening clamp sleeved on the outer surface of the sleeve assembly, and an adhesive injection assembly fixedly disposed on the outer surface of the upper fastening clamp. The inner structures of the upper fastening clamp and the lower fastening clamp are arranged opposite to each other.

8. The HVAC duct sealing connection device according to claim 7, characterized in that, The upper fastening clamp includes a sealing ring on the inner side that is adapted to the outer surface of the outer tube, and a reinforcing groove located in the middle of the sealing ring and recessed, which is adapted to the outer surface of the reinforcing ring.

9. The HVAC duct sealing connection device according to claim 1, characterized in that, The upper and lower fastening clamps extend outward from their respective ends to form end tubes that are sleeved on the outer surface of the tube body. Each end tube includes an injection groove that is respectively opened between the upper and lower fastening clamps and is connected to the injection assembly.

10. The HVAC duct sealing connection device according to claim 9, characterized in that, The glue injection assembly includes a heat insulation box fixedly connected to the upper fastening clamp, a glue storage tank opened in the heat insulation box for accommodating the sealant, miniature clamp valves disposed on both sides of the bottom of the glue storage tank, and a micro differential pressure sensor embedded in the glue injection tank and electrically connected to the miniature clamp valves. The two ends of the miniature clamp valves are respectively connected to the glue injection tank and the glue storage tank.

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