A purification workshop air pipe heat preservation and noise reduction integrated pipeline

Abstract

The present application relates to the field of clean workshop air conditioning technology, and more particularly to a clean workshop air duct heat preservation and noise reduction integrated pipeline, comprising a top hanging frame hung on the ceiling of the clean workshop and a top corner pipeline, the top corner pipeline is composed of an external positive pressure flow guide pipe and an internal negative pressure flow guide pipe and is fixedly connected through an end corner driving seat, and the assembly pipes at both ends of the end corner driving seat are fixedly connected with the external positive pressure flow guide pipe and the internal negative pressure flow guide pipe at the two sides respectively. The present application realizes heat preservation and noise reduction through the heat preservation airflow interlayer between the double-layer flow guide pipes, uses pressure sensors and vibration sensors to drive the closed cover plate to adaptively adjust the air pressure and vibration, and can conveniently clean the dust collection, has good heat preservation and noise reduction effect, and is convenient to operate and maintain.

Description

Technical Field

[0001] This invention relates to the field of cleanroom air conditioning technology, and in particular to an integrated heat preservation and noise reduction duct for cleanrooms. Background Technology

[0002] Cleanrooms are widely used in industries with stringent requirements for air cleanliness, such as pharmaceuticals, electronics, precision manufacturing, and food processing. Their core function is to filter particulate matter, microorganisms, and other impurities in the air by regulating the cleanliness, temperature, humidity, air pressure, and dust concentration of the cleanroom, thereby providing a sterile, dust-free, and stable clean production environment for production operations, ensuring product quality, and avoiding production problems such as pollution and defects.

[0003] Air purification ducts are the core components of the ventilation and purification system in cleanrooms, playing a crucial role in clean air delivery, airflow circulation, and air pressure regulation, directly determining the overall purification effect and operational stability of the cleanroom. Currently, most air purification ducts used in cleanrooms employ traditional single-layer structures, which have numerous technical shortcomings in practical applications. These ducts have weak noise reduction and insulation properties, easily generating airflow noise and heat loss during operation, affecting the workshop's working environment and temperature control accuracy. Furthermore, the fixed single-layer duct structure cannot adapt to differences in air pressure and vibration in different areas of the cleanroom, and cannot perform targeted vibration adaptive control. Long-term operation can easily lead to problems such as duct wall vibration and airflow turbulence, not only reducing purification efficiency but also causing duct structure loosening and sealing failure. In addition, traditional single-layer ducts are inconvenient to disassemble and repair, making troubleshooting and maintenance difficult and resulting in high operating costs, failing to meet the long-term stable, low-loss, and easy-to-maintain requirements of high-precision cleanrooms.

[0004] Therefore, how to provide a cleanroom duct with good thermal insulation and noise reduction performance, adaptive control of wind pressure and vibration, and convenient disassembly and maintenance is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The technical problem to be solved by this invention is that the existing cleanroom ducts mostly adopt the traditional single-layer structure, which has weak noise reduction and heat insulation performance. They cannot adapt to the differences in wind pressure and vibration in different areas of the workshop for adaptive control. Long-term operation is prone to pipe wall vibration and airflow turbulence. Moreover, disassembly and maintenance are inconvenient and the operation and maintenance costs are high.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an integrated heat preservation and noise reduction duct for cleanrooms, including a top hanging frame and a corner pipe suspended on the ceiling of the cleanroom. The corner pipes are fixedly connected by corner drive seats at their ends. The corner pipes are fixed to the corner of the ceiling of the cleanroom by the top hanging frame. The corner pipes are composed of an external positive pressure guide pipe located on the outside and an internal negative pressure guide pipe fixed on the inside. The assembly pipes at both ends of the corner drive seat are fixedly connected to the external positive pressure guide pipe and the internal negative pressure guide pipe at the connection ends on both sides.

[0007] Furthermore, the outer positive pressure guide tube has a lateral opening and a bottom opening on its outer side wall, and the inner negative pressure guide tube is fixedly connected to the bottom opening through the bottom support guide tube.

[0008] Furthermore, an electrically controlled external closing cover is hinged to the outer opening position corresponding to the lateral opening on the outer wall of the external positive pressure guide pipe.

[0009] Furthermore, the electrically controlled external closing cover includes an external flip-closing guide plate hinged to the outer wall of the external positive pressure guide pipe and an external control support rod hinged to the inside of the external positive pressure guide pipe via an inner bracket. The extended end of the external control support rod is movably connected to the inner side of the external flip-closing guide plate.

[0010] Furthermore, an electrically controlled internal closing cover is hinged to the inner wall of the internal negative pressure guide tube at the position of the inner opening corresponding to the bottom opening.

[0011] Furthermore, the electrically controlled internal closing cover includes a built-in flip-closing guide plate hinged to the inner wall of the internal negative pressure guide tube and a built-in control support rod hinged to the inner wall of the internal negative pressure guide tube via an internal bracket. The extended end of the built-in control support rod is movably connected to the inner side of the built-in flip-closing guide plate.

[0012] Furthermore, pressure sensors are installed on the inner sides of both the external flip-closed flow deflector and the internal flip-closed flow deflector.

[0013] Furthermore, the end angle drive housing includes an external mounting cover, an internal transmission cover fixed inside the external mounting cover, an internally threaded mounting through hole opened at the lower end of the external mounting cover, a bottom dust collection box threadedly fitted at the lower end of the external mounting cover, and a drive motor fixed at the upper end of the external mounting cover.

[0014] Furthermore, a lower air inlet with a removable dust filter installed inside is provided on the lower surface of the built-in transmission cover.

[0015] Furthermore, vibration sensors are also installed on the inner sides of both the external flip-closed guide plate and the internal flip-closed guide plate.

[0016] The beneficial effects of this invention are as follows: A double-layer flow-guiding structure consisting of an external positive pressure flow-guiding pipe and an internal negative pressure flow-guiding pipe forms a heat-insulating airflow interlayer between the two pipes. This utilizes a still air layer to reduce heat exchange between the inside and outside of the pipe and attenuate airflow noise, significantly improving the heat insulation and noise reduction performance of the ductwork and reducing energy consumption for temperature control and airflow noise in the workshop. Through the use of electrically controlled external and internal closing covers, along with pressure and vibration sensors, the opening of the flow-guiding plate is automatically adjusted according to changes in air pressure and vibration within the pipe, achieving adaptive control of air pressure and vibration. This effectively suppresses pipe wall vibration and airflow turbulence, ensuring airflow stability and purification efficiency in the cleanroom. The end-corner drive seat adopts a modular structure, with a bottom dust collection box and internal threaded mounting through-holes for threaded assembly. The dust filter is removable for cleaning, allowing for dust removal and component maintenance without disassembling the entire pipe. This facilitates easy disassembly and repair, resulting in low maintenance costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the apex pipe in this invention;

[0020] Figure 3 This is a schematic diagram of the end-angle drive seat in this invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the end-angle drive seat in this invention;

[0022] Explanation of reference numerals in the attached drawings: 100. Top hanging frame; 110. Top corner pipe; 120. External positive pressure guide pipe; 130. Internal negative pressure guide pipe; 140. End corner drive seat; 150. Assembly pipe; 160. Bottom support guide pipe; 170. Side opening; 180. Bottom opening; 210. Electrically controlled external closing cover; 211. External flip-up closing guide plate; 212. External control strut; 213. Inner bracket; 310. Electrically controlled internal closing cover; 311. Internal flip-up closing guide plate; 312. Internal control strut; 313. Internal bracket; 410. Pressure sensor; 420. Vibration sensor; 510. External mounting cover; 520. Internal transmission cover; 530. Internal threaded mounting through hole; 540. Bottom dust collection box; 550. Drive motor; 560. Lower air inlet; 570. Removable dust filter. Detailed Implementation

[0023] The following is combined Figures 1 to 4The invention is further described below. Corner pipes 110 are suspended and fixed at the corners of the cleanroom ceiling via a top hanging frame 100. The corner pipes 110 are arranged along the corners of the ceiling, and adjacent corner pipes 110 are fixedly connected by end-corner drive seats 140 at their ends. Each corner pipe 110 consists of an external positive pressure guide pipe 120 located on the outer side and an internal negative pressure guide pipe 130 fixed on the inner side. An insulated airflow interlayer is formed between the external positive pressure guide pipe 120 and the internal negative pressure guide pipe 130. This interlayer facilitates heat exchange between the input and output air within the pipe, providing insulation and reducing heat loss. Furthermore, the double-layered pipe wall and airflow interlayer reflect and absorb airflow noise multiple times, reducing noise. The mounting pipes 150 at both ends of the end-corner drive seat 140 are fixedly connected to the external positive pressure guide pipe 120 and the internal negative pressure guide pipe 130 at their respective connecting ends.

[0024] like Figure 3 As shown, the end-angle drive base 140 includes an outer mounting cover 510, an inner transmission cover 520 fixed inside the outer mounting cover 510, an internally threaded mounting through hole 530 opened at the lower end of the outer mounting cover 510, a bottom dust collection box 540 threadedly fitted at the lower end of the outer mounting cover 510, and a drive motor 550 fixed at the upper end of the outer mounting cover 510. A lower air inlet 560 is provided on the lower surface of the inner transmission cover 520, and a removable dust filter 570 is installed at the lower air inlet 560. The output shaft of the drive motor 550 extends into the inner transmission cover 520, and drives the extension and retraction of the external control support rod 212 and the inner control support rod 312 through a transmission mechanism within the inner transmission cover 520. The transmission mechanism adopts a worm gear reduction mechanism or a rack and pinion mechanism.

[0025] like Figure 2 As shown, the outer wall of the external positive pressure guide pipe 120 has a lateral opening 170 and a bottom opening 180. The internal negative pressure guide pipe 130 is fixedly connected to the bottom opening 180 through a bottom support guide pipe 160. An electrically controlled external closing cover 210 is hinged to the outer wall of the external positive pressure guide pipe 120 at the position corresponding to the outer opening of the lateral opening 170. The electrically controlled external closing cover 210 includes an externally mounted flip-closing guide plate 211 hinged to the outer wall of the external positive pressure guide pipe 120 and an externally mounted control support rod 212 hinged inside the external positive pressure guide pipe 120 through an inner support 213. The extended end of the externally mounted control support rod 212 is movably connected to the inner side of the externally mounted flip-closing guide plate 211. When the externally mounted control support rod 212 extends or retracts, its extended end drives the externally mounted flip-closing guide plate 211 to rotate around the hinge axis, thereby opening and closing the lateral opening 170 and adjusting the opening angle.

[0026] An electrically controlled internal closing cover 310 is hinged to the inner wall of the internal negative pressure guide tube 130 at the inner opening position corresponding to the bottom opening 180. The electrically controlled internal closing cover 310 includes a built-in flip-closing guide plate 311 hinged to the inner wall of the internal negative pressure guide tube 130 and a built-in control support rod 312 hinged to the inner wall of the internal negative pressure guide tube 130 via an internal bracket 313. The extended end of the built-in control support rod 312 is movably connected to the inner side of the built-in flip-closing guide plate 311. When the built-in control support rod 312 extends or retracts, it drives the built-in flip-closing guide plate 311 to flip around the hinge axis, thereby opening and closing the channel between the internal negative pressure guide tube 130 and the bottom support guide tube 160.

[0027] Pressure sensors 410 are installed on the inner surfaces of both the external flip-closed guide plate 211 and the internal flip-closed guide plate 311 to detect the airflow pressure within the corresponding guide pipe. Vibration sensors 420 are also installed on the inner surfaces of both the external flip-closed guide plate 211 and the internal flip-closed guide plate 311 to detect vibrations of the guide plate and pipe wall caused by airflow impact. The drive motor 550 is a servo motor, electrically connected to the controller. The pressure sensors 410 and vibration sensors 420 are also electrically connected to the controller. Based on the comparison between the pipe pressure detected by the pressure sensor 410 and the set pressure threshold, the controller controls the drive motor 550 to rotate forward or backward. This drives the external control support rod 212 to extend or retract via the transmission mechanism within the built-in transmission cover 520, thereby adjusting the opening degree of the external flip-closed guide plate 211. Similarly, based on the vibration amplitude detected by the vibration sensor 420, the controller controls the extension and retraction of the internal control support rod 312 to adjust the opening degree of the internal flip-closed guide plate 311.

[0028] When the cleanroom is ventilated, clean air from the external positive pressure guide pipe 120 is delivered into the cleanroom through the side opening 170. When the air volume delivered through the side opening 170 is insufficient or the pressure inside the pipe is higher than the set upper pressure limit, the controller controls the drive motor 550 to rotate forward, the external control support rod 212 extends, and the external flip-close guide plate 211 flips outward to open, increasing the ventilation area of ​​the side opening 170, and the pressure inside the pipe drops accordingly. When the pressure inside the pipe is lower than the set lower pressure limit, the controller controls the drive motor 550 to rotate in reverse, the external control support rod 212 retracts, and the external flip-close guide plate 211 resets and closes, reducing the ventilation area and stabilizing the pressure inside the pipe within the set range, thus achieving adaptive air pressure control. During the return air operation, the airflow in the workshop enters the internal negative pressure guide pipe 130 through the bottom opening 180 and the bottom support guide pipe 160. When the airflow turbulence causes the built-in flip-close guide plate 311 and the pipe wall to vibrate, and the vibration amplitude detected by the vibration sensor 420 exceeds the set threshold, the controller controls the extension and retraction of the built-in control strut 312 to adjust the opening of the built-in flip-close guide plate 311, change the cross-section of the airflow channel, suppress the airflow turbulence and pipe wall vibration, and achieve vibration adaptive control.

[0029] In this embodiment, the pressure sensor 410 is a differential pressure sensor with a range of ±500Pa and a measurement accuracy of ±1%FS; the vibration sensor 420 is a piezoelectric accelerometer with a range of ±10g and a sensitivity of 100mV / g; the controller is a PLC with a sampling period of 100ms; the drive motor 550 is a 24V DC servo motor with a rated torque of 0.5N·m, and the transmission mechanism inside the built-in transmission cover 520 is a worm gear reducer with a reduction ratio of 30:1; the external control support rod 212 and the built-in control support rod 312 are miniature electric push rods with a stroke of 30mm and an extension speed of 5mm / s; the external flip-closed guide plate 211 and the built-in flip-closed guide plate 311 have a flip angle range of 0° to 90°. Both the external positive pressure guide pipe 120 and the internal negative pressure guide pipe 130 are made of aluminum alloy plate with a wall thickness of 2mm, and the width of the heat-insulating airflow jacket is 20mm. By monitoring the vibration magnitude at different locations, the external control strut 212 and the internal control strut 312 are automatically activated to cut off the air intake and exhaust at those locations, thereby reducing the source of vibration.

[0030] The external positive pressure guide pipe 120 contains positive pressure clean airflow, while the internal negative pressure guide pipe 130 contains negative pressure return airflow. These two airflows flow independently on both sides of the insulation airflow interlayer, without mixing. Dust carried by the return airflow enters the bottom dust collection box 540 through the bottom support guide pipe 160 and the lower air inlet 560. The dust is intercepted by the removable dust filter 570 and deposited inside the bottom dust collection box 540. During maintenance, the bottom dust collection box 540 is unscrewed from the internal threaded mounting hole 530, the removable dust filter 570 is removed, cleaned, and reassembled. This eliminates the need to disassemble the entire ductwork, making disassembly and assembly convenient and reducing maintenance costs.

Claims

1. A heat-insulating and noise-reducing integrated duct for cleanrooms, comprising a top hanging frame (100) suspended from the ceiling of the cleanroom and a corner duct (110), characterized in that: The corner pipes (110) are fixedly connected by corner drive seats (140) at the ends. The corner pipes (110) are fixed to the corner of the ceiling of the clean room by the top hanging frame (100). The corner pipes (110) are composed of an external positive pressure guide pipe (120) located on the outside and an internal negative pressure guide pipe (130) fixed on the inside. The assembly pipes (150) at both ends of the corner drive seat (140) are fixedly connected to the external positive pressure guide pipe (120) and the internal negative pressure guide pipe (130) at the two connecting ends respectively.

2. The integrated insulation and noise reduction duct for cleanroom air ducts according to claim 1, characterized in that: The external positive pressure guide pipe (120) has a lateral opening (170) and a bottom opening (180) on its outer side wall. The internal negative pressure guide pipe (130) is fixedly connected to the bottom opening (180) through the bottom support guide pipe (160).

3. The integrated insulation and noise reduction duct for cleanroom ventilation as described in claim 2, characterized in that: An electrically controlled external closing cover plate (210) is hinged to the outer opening position of the lateral opening (170) on the outer wall of the external positive pressure guide pipe (120).

4. The integrated insulation and noise reduction duct for cleanroom ventilation as described in claim 3, characterized in that: The electrically controlled external closing cover (210) includes an external flip-closing guide plate (211) hinged to the outer wall of the external positive pressure guide pipe (120) and an external control support rod (212) hinged to the inside of the external positive pressure guide pipe (120) via an inner support (213). The extended end of the external control support rod (212) is movably connected to the inner side of the external flip-closing guide plate (211).

5. The integrated insulation and noise reduction duct for cleanroom ventilation as described in claim 4, characterized in that: An electrically controlled internal closing cover plate (310) is hinged to the inner wall of the internal negative pressure guide tube (130) at the inner opening position corresponding to the bottom opening (180).

6. The integrated insulation and noise reduction duct for cleanroom air ducts according to claim 5, characterized in that: The electrically controlled internal closing cover (310) includes a built-in flip-closing guide plate (311) hinged to the inner wall of the internal negative pressure guide pipe (130) and a built-in control support rod (312) hinged to the inner wall of the internal negative pressure guide pipe (130) via an internal bracket (313). The extended end of the built-in control support rod (312) is movably connected to the inner side of the built-in flip-closing guide plate (311).

7. The integrated insulation and noise reduction duct for cleanroom air ducts according to claim 6, characterized in that: Pressure sensors (410) are installed on the inner sides of both the external flip-closed flow guide plate (211) and the internal flip-closed flow guide plate (311).

8. The integrated insulation and noise reduction duct for cleanroom ventilation as described in claim 1, characterized in that: The corner drive base (140) includes an outer mounting cover (510), an inner transmission cover (520) fixed inside the outer mounting cover (510), an internal threaded mounting through hole (530) opened at the lower end of the outer mounting cover (510), a bottom dust collection box (540) threadedly assembled at the lower end of the outer mounting cover (510), and a drive motor (550) fixed at the upper end of the outer mounting cover (510).

9. The integrated insulation and noise reduction duct for cleanroom air ducts according to claim 8, characterized in that: The lower surface of the built-in transmission cover (520) is provided with a lower air inlet (560) for internally installed detachable dust filter (570).

10. The integrated insulation and noise reduction duct for a cleanroom as described in claim 6, characterized in that: Vibration sensors (420) are also installed on the inner sides of the external flip-closed guide plate (211) and the internal flip-closed guide plate (311).

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