A prefabricated HVAC duct for cleanroom engineering

Abstract

This utility model relates to a prefabricated HVAC duct for cleanroom engineering, comprising: a ventilation duct with connecting pipes rotatably installed at both ends, an outwardly extending insertion pipe fixedly installed inside the connecting pipe, and two radially protruding locking platforms on the outer peripheral wall of the connecting pipe; and a connecting pipe fixedly connected to the equipment port of the cleanroom engineering, with a rotating groove adapted to the locking platforms on the inner wall of one end of the connecting pipe, and a bearing ring inside the connecting pipe, with a support spring fixedly installed at one end of the bearing ring. This utility model relates to the technical field of ventilation ducts for cleanroom engineering. When disassembling this prefabricated HVAC duct for cleanroom engineering, the connecting pipe and insertion pipe are pulled out, and simultaneously the tension spring contracts to pull the sealing pipe back to its original position, causing its end to re-enter the connecting pipe. This utilizes the wall of the sealing pipe to seal the opening of the connecting pipe, preventing dust accumulated inside the ventilation duct from escaping and contaminating the cleanroom environment during disassembly.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation ducts for cleanroom engineering, and in particular to a prefabricated heating and ventilation duct for cleanroom engineering. Background Technology

[0002] In cleanroom engineering projects such as biopharmaceuticals, electronic chips, food processing, and hospital operating rooms, ventilation duct systems are one of the core infrastructures for maintaining environmental cleanliness. These systems require regular replacement or cleaning of their air filters to ensure the cleanliness and quality of the supplied air.

[0003] However, in the existing technology, during the process of dismantling old air ducts or installing new air ducts, pollutants accumulated inside the ducts can easily escape into the clean environment, causing secondary pollution, seriously damaging the cleanliness level of the cleanroom, and bringing product quality risks. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a prefabricated heating and ventilation duct for cleanroom engineering, so as to solve the technical problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A prefabricated HVAC duct for cleanroom engineering includes:

[0007] The ventilation duct has connecting pipes rotatably installed at both ends;

[0008] The connecting pipe is fixedly installed with an outward insertion pipe inside, and the outer peripheral wall of the connecting pipe is provided with two radially protruding locking platforms;

[0009] The connecting pipe is fixedly connected to the equipment port of the cleanroom project. One end of the connecting pipe has a rotating groove on its inner wall that is compatible with the locking platform. The connecting pipe has a bearing ring inside, and a support spring is fixedly installed at one end of the bearing ring. The other end of the connecting pipe is slidably connected to a sealing pipe. A tension spring is installed between the sealing pipe and the inner wall of the connecting pipe. A guide hole is opened on the wall of the sealing pipe.

[0010] Furthermore, the connecting pipe has an inner guide groove for accommodating the tension spring.

[0011] Furthermore, the rotary groove includes an inlet section that matches the shape of the locking platform and a rotary locking section for locking the locking platform.

[0012] Furthermore, the outer diameter of the closed tube is equal to the inner diameter of the connecting tube, and in the reset state, its end is located inside the connecting tube.

[0013] Furthermore, the inside of the inserted pipe is fixed with a pin by several support rods, the end of the pin points to the connecting pipe, and the center of the connecting pipe is provided with an insertion hole that mates with the pin.

[0014] Furthermore, the inner diameter of the bearing ring is equal to the diameter of the outer tube of the insertion tube.

[0015] In summary, this utility model has at least one of the following beneficial technical effects:

[0016] 1. This prefabricated HVAC duct for cleanroom engineering, when disassembled, the connecting pipe and the insertion pipe are pulled out, and at the same time the tension spring contracts to pull the sealing pipe back to its original position, so that its end is submerged in the connecting pipe again. Thus, the pipe wall of the sealing pipe seals the opening of the connecting pipe, preventing dust accumulated inside the ventilation duct from escaping and flowing into and contaminating the cleanroom environment during disassembly.

[0017] 2. During installation, the plug pipe installed inside the connecting pipe is inserted into the bearing ring, and its end pushes the closed pipe to slide outward against the force of the tension spring, so that the guide hole on its pipe wall moves out of the connecting pipe, thereby opening the airflow channel and allowing the filtered air to enter the interior of the cleanroom equipment through the ventilation pipe.

[0018] 3. This prefabricated HVAC duct for cleanroom engineering is installed by aligning the locking plate of the connecting pipe with the inlet section of the rotary groove of the connecting pipe. During this process, the connecting pipe pushes and compresses the support spring and penetrates deeper into the connecting pipe. Then, the connecting pipe is rotated so that the locking plate slides into the rotary locking section. The support spring pushes the connecting pipe to press the locking plate deep into the locking section, thereby achieving mechanical locking. This method allows for simple, quick, and tool-free locking and unlocking, effectively improving maintenance and replacement efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a prefabricated heating and ventilation duct for cleanroom engineering according to this utility model.

[0021] Figure 2 This is a schematic diagram of the connecting pipe of a prefabricated heating and ventilation duct for cleanroom engineering according to this utility model.

[0022] Figure 3This is a schematic diagram of the connecting pipe of a prefabricated heating and ventilation duct for cleanroom engineering according to this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the connecting pipe of a prefabricated heating and ventilation duct for cleanroom engineering according to this utility model.

[0024] In the diagram, 1 is the ventilation duct; 2 is the connecting duct; 3 is the insertion duct; 4 is the locking platform; 5 is the connecting duct; 6 is the rotary groove; 61 is the inlet section; 62 is the locking section; 7 is the bearing ring; 8 is the support spring; 9 is the sealing duct; 10 is the tension spring; 11 is the guide hole; 12 is the inner guide groove; and 13 is the ejector pin. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example:

[0027] Reference Figure 1 - Figure 4 The present invention discloses a prefabricated heating and ventilation duct 1 for cleanroom engineering, comprising:

[0028] Ventilation duct 1, with connecting ducts 2 rotatably installed at both ends;

[0029] The connecting pipe 2 is fixedly provided with an outward insertion pipe 3, and the outer peripheral wall of the connecting pipe 2 is provided with two radially protruding locking platforms 4;

[0030] The connecting pipe 5 is fixedly connected to the equipment port of the cleanroom project. One end of the connecting pipe 5 has a rotary groove 6 that matches the locking platform 4 on its inner wall. The connecting pipe 5 has a bearing ring 7 inside. One end of the bearing ring 7 is fixedly equipped with a support spring 8. The other end of the connecting pipe 5 is slidably connected to a sealing pipe 9. A tension spring 10 is provided between the sealing pipe 9 and the inner wall of the connecting pipe 5. A guide hole 11 is provided on the wall of the sealing pipe 9.

[0031] In this embodiment, the rapid assembly, sealing and disassembly of the ventilation pipe 1 are achieved by using the rotating connecting pipe 2 in conjunction with the support spring 8 and the rotary groove 6;

[0032] During installation, first, align the locking plate 4 of the connecting pipe 2 with the inlet section 61 of the rotary groove 6 of the connecting pipe 5 and insert it. During this process, the connecting pipe 2 pushes and compresses the support spring 8 and penetrates deep into the connecting pipe 5. Then, rotate the connecting pipe 2 so that the locking plate 4 slides into the rotary locking section 62. The support spring 8 pushes the connecting pipe 2 so that the locking plate 4 is pressed deep into the locking section 62, thereby completing the mechanical locking. At the same time, the insertion pipe 3 set in the connecting pipe 2 is inserted into the inside of the bearing ring 7, and its end will push the sealing pipe 9 to slide outward against the force of the tension spring 10, so that the guide hole 11 on its pipe wall moves out of the connecting pipe 5, thereby opening the airflow channel and allowing the filtered air to enter the interior of the cleanroom equipment through the ventilation pipe 1.

[0033] During disassembly, pushing the connecting pipe 2 causes the locking platform 4 to move out of the locking section 62 and to the connection point between the locking section 62 and the inlet section 61. Rotating the connecting pipe 2 causes the locking platform 4 to enter the inlet groove. Under the rebound force of the support spring 8, the connecting pipe 2 and the insertion pipe 3 can be easily pulled out. At the same time, the tension spring 10 contracts and pulls the sealing pipe 9 back to its original position, so that its end is submerged in the connecting pipe 5 again. Thus, the pipe wall of the sealing pipe 9 seals the opening of the connecting pipe 5, preventing dust accumulated inside the ventilation pipe 1 from escaping and flowing into and contaminating the cleanroom environment during disassembly. Throughout the process, the ejector pin 13 can cooperate with the insertion pipe 3 to push the sealing pipe 9 to move, improving the stability of the movement of the sealing pipe 9, ensuring unobstructed airflow, improving the efficiency of filter duct replacement operations, and ensuring the cleanliness of the cleanroom equipment.

[0034] In a further preferred embodiment of this utility model, such as Figure 4 As shown, the connecting pipe 5 has an inner guide groove 12 for accommodating the tension spring 10.

[0035] In this embodiment, the inner guide groove 12 inside the connecting pipe 5 provides a precise installation and movement space for the tension spring 10. The inner guide groove 12 plays a role in radial limiting and guiding the tension spring 10, ensuring that the spring always maintains axial movement during compression and rebound without deviation or jamming. This improves the stability and smoothness of the sliding process of the sealing pipe 9, and ensures that the sealing pipe 9 can be quickly and accurately reset under the action of the tension spring 10 when disassembling, so as to achieve the purpose of immediate and reliable sealing of the pipe opening and preventing dust leakage.

[0036] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the rotary groove 6 includes an inlet section 61 that matches the shape of the locking platform 4 and a rotary locking section 62 for locking the locking platform 4.

[0037] In this embodiment, the rotary groove 6 consists of an inlet section 61 and a rotary locking section 62. During installation, the locking platform 4 slides in along the inlet section 61 to provide guidance for the insertion of the connector 3. Then, the connecting pipe 2 is rotated, and the locking platform 4 enters the rotary locking section 62. Under the pre-tightening force of the support spring 8, it is tightly locked, forming a self-locking mechanism and completing a firm connection. This allows the duct to be locked and separated easily, quickly, and without any tools, effectively improving the efficiency of maintenance and replacement.

[0038] In a further preferred embodiment of this utility model, such as Figure 4 As shown, the outer diameter of the closed tube 9 is equal to the inner diameter of the connecting tube 5, and in the reset state, its end is located inside the connecting tube 5.

[0039] In this embodiment, the outer diameter of the closed tube 9 is equal to the inner diameter of the connecting tube 5, which can form a sliding fit relationship. Dynamic sealing is achieved by the sliding sealing ring set on the outer wall of the closed tube 9. In the reset state, the guide hole 11 opened on the outer peripheral wall of the closed tube 9 is located inside the connecting tube 5. When the air duct is disassembled and the closed tube 9 is pulled back by the tension spring 10, its tube wall can tightly seal the port of the connecting tube 5, effectively isolating the inside of the air duct from the clean engineering environment, preventing the reverse dispersion of dust inside the ventilation duct 1 during disassembly, and ensuring the cleanliness of the clean space.

[0040] In a further preferred embodiment of this utility model, such as Figure 3 As shown, the inside of the inserted pipe 3 is fixedly provided with a pin 13 by several support rods. The end of the pin 13 points to the connecting pipe 5, and the center of the connecting pipe 5 is provided with an insertion hole that cooperates with the pin 13.

[0041] In this embodiment, the pin 13 fixed inside the insertion tube 3 by the support rod contacts the sealing tube 9 simultaneously with the insertion tube 3 during the insertion of the insertion tube 3 into the connecting tube 5. The pin 13 can cooperate with the insertion tube 3 to push the sealing tube 9 to move, thereby improving the stability of the movement of the sealing tube 9, ensuring unobstructed airflow, improving the efficiency of filter duct replacement operations, ensuring the cleanliness of the cleanroom equipment, and improving the reliability of the linkage mechanism.

[0042] In a further preferred embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the inner diameter of the bearing ring 7 is equal to the diameter of the outer tube of the insertion tube.

[0043] In this embodiment, the inner diameter of the bearing ring 7 is equal to the outer diameter of the insertion pipe 3, and the two form a sliding fit, allowing air to directly enter the interior of the connecting pipe 5, isolating the support spring 8 from the air. At the same time, when the insertion pipe 3 is inserted into the bearing ring 7, it can play a good centering and guiding role, ensuring that the insertion pipe 3 and the connecting pipe 5 remain coaxial and are inserted smoothly. Secondly, the tight fit can effectively reduce air leakage at the connection point, significantly improve the airtightness of the connection node, ensure the efficiency of the ventilation system, and prevent unfiltered air from short-circuiting into the clean area through gaps.

[0044] The implementation principle of the above embodiment is as follows: the locking platform 4 of the connecting pipe 2 is aligned with the inlet section 61 of the rotary groove 6 of the connecting pipe 5 and inserted and rotated. Under the pre-tightening force of the support spring 8, the locking platform 4 is locked into the rotary locking section 62 to complete self-locking. During this process, the insertion pipe 3 is simultaneously inserted into the bearing ring 7 and pushes the sealing pipe 9 to slide outward against the force of the tension spring 10, so that its guide hole 11 moves out of the connecting pipe 5, thereby opening the airflow channel.

[0045] During disassembly, the reverse operation causes the locking platform 4 to exit the rotary groove 6, the support spring 8 to rebound and push out the insertion tube 3, and at the same time the tension spring 10 instantly pulls the sealing tube 9 back to its original position, so that its tube wall tightly seals the port of the connecting tube 5. The ejector pin 13 works with the insertion tube 3 to help unblock the sealing tube 9. All components work together precisely to achieve quick installation and disassembly without tools, automatic conduction at the moment of connection, and automatic sealing at the moment of separation, effectively preventing dust from escaping during the disassembly and assembly process, and ensuring the cleanliness and maintenance efficiency of the cleanroom project.

[0046] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A clean room assembly type heating and ventilation duct, characterized by, Including: Ventilation duct (1), with connecting pipes (2) rotatably installed at both ends; The connecting pipe (2) is fixedly provided with an outward insertion pipe (3), and the outer peripheral wall of the connecting pipe (2) is provided with two radially protruding locking platforms (4). The connecting pipe (5) is fixedly connected to the equipment port of the cleanroom project. A rotary groove (6) adapted to the locking platform (4) is opened on the inner wall of one end of the connecting pipe (5). A bearing ring (7) is provided inside the connecting pipe (5). A support spring (8) is fixedly provided on one end of the bearing ring (7). A sealing pipe (9) is slidably connected to the other end of the connecting pipe (5). A tension spring (10) is provided between the sealing pipe (9) and the inner wall of the connecting pipe (5). A guide hole (11) is opened on the pipe wall of the sealing pipe (9).

2. The assembled heating and ventilating duct for clean engineering according to claim 1, characterized in that, The connecting pipe (5) has an inner guide groove (12) for accommodating the tension spring (10).

3. The assembled heating and ventilating duct for clean engineering according to claim 2, characterized in that, The rotary groove (6) includes an inlet section (61) that matches the shape of the locking table (4) and a rotary locking section (62) for locking the locking table (4).

4. The assembled heating and ventilating duct for clean engineering according to claim 3, characterized in that, The outer diameter of the closed tube (9) is equal to the inner diameter of the connecting tube (5), and its end is located inside the connecting tube (5) in the reset state.

5. The cleanroom assembly of claim 4, wherein: Inside the inserted tube (3), a pin (13) is fixedly installed by several support rods. The end of the pin (13) points to the connecting tube (5), and the center of the connecting tube (5) is provided with an insertion hole that cooperates with the pin (13).

6. The cleanroom assembly of claim 5, wherein: The inner diameter of the bearing ring (7) is equal to the diameter of the outer tube of the insertion tube.

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