Adjusting device for heat supply ventilation pipeline and heat supply system

Abstract

The invention relates to the technical field of building ventilation and heat supply, and discloses an adjusting device for a heat supply ventilation pipeline and a heat supply system.The device comprises a main body pipe, multiple inclined sliding ways are arranged on the inner wall of the main body pipe, and the inclined sliding ways are distributed in the circumferential direction of the main body pipe at intervals; the adjusting mechanism comprises an adjusting assembly and a plurality of sliding blocks, the sliding blocks are arranged on the inclined sliding ways in a one-to-one sliding mode, and the adjusting assembly is connected with the sliding blocks and used for driving all the sliding blocks to synchronously slide on the inclined sliding ways so that the sliding blocks can move towards or away from the central axis of the main body pipe. The sliding blocks can be driven by the adjusting assemblies to synchronously slide along the inclined sliding ways, so that all the sliding blocks can synchronously move towards or away from the central axis of the main body pipe at equal intervals, continuous adjustment of the circulation area of the main body pipe is achieved, and finally adjustment of local air volume of the heat supply system is achieved; and the problem of non-uniform airflow distribution or system energy consumption waste is avoided.

Description

Technical Field

[0001] This invention relates to the field of building ventilation and heating technology, specifically to a regulating device and heating system for heating and ventilation ducts. Background Technology

[0002] In building heating and ventilation systems, the main ductwork plays a crucial role in delivering treated air evenly and efficiently to various end spaces. Its delivery efficiency and stability directly affect indoor comfort, air quality, and system energy consumption. However, traditional main ductwork typically employs a fixed cross-section design, and this inherent physical characteristic presents fundamental technical limitations when dealing with complex and ever-changing actual operating conditions.

[0003] Once installed, the ventilation area of ​​a fixed-section duct cannot be changed. This makes it difficult for airflow to respond to the dynamically changing needs within a building. For example, different functional areas within a building (such as densely populated office areas and equipment areas) have inherently different airflow requirements; the airflow required in the same area also varies significantly in different seasons (cooling season and heating season) or at different times (peak usage period and nighttime low load period). A duct system with a fixed ventilation area cannot adapt to these variations and can only operate at the maximum or average capacity designed in the system, often resulting in either over-supply or under-supply.

[0004] When the airflow is less than the duct's design capacity due to reduced demand, an excessively large fixed ventilation area will cause a significant decrease in airflow velocity. This not only weakens the airflow's ability to overcome duct resistance, resulting in severe airflow inadequacy in distant areas, ventilation dead zones, and uneven temperature distribution, but may also affect the efficiency of air purifiers or heat exchangers due to excessively low velocity. Conversely, when the system requires higher airflow, a fixed ventilation area may limit its maximum delivery capacity or force the airflow to pass through at a higher velocity, thereby exacerbating airflow noise, vibration, and significant pressure loss within the duct. Summary of the Invention

[0005] In view of the problem that the fixed cross-section main pipe in the above-mentioned prior art cannot adjust the flow rate, resulting in uneven airflow distribution or excessive system energy consumption, the present invention provides an adjusting device for heating and ventilation pipes, which can adjust the pipe flow rate.

[0006] In a first aspect, the present invention provides an adjusting device for a heating and ventilation duct, comprising: a main pipe, wherein a plurality of inclined slides are provided on the inner wall of the main pipe, the inclined slides being distributed at intervals along the circumference of the main pipe; and an adjusting mechanism, comprising an adjusting component and a plurality of sliders, the sliders being slidably disposed on the inclined slides, the adjusting component being connected to the sliders and used to drive all the sliders to slide synchronously on the inclined slides, so that all the sliders move toward or away from the central axis of the main pipe.

[0007] The regulating device for heating and ventilation ducts provided by this invention initially consists of multiple sliders positioned at a certain location on an inclined slide rail, collectively forming an initial ventilation cross-section. When the airflow demand in a specific area of ​​the building changes, the regulating mechanism drives all sliders to slide synchronously and in the same direction along their respective inclined slide rails. The sliding of the sliders on the inclined slide rail is decomposed into two component movements: axial translation and radial movement. When the sliders move away from the central axis of the main duct, the ventilation cross-sectional area enclosed by their inner edges increases; conversely, when the sliders move towards the central axis, the ventilation cross-sectional area decreases. The sliders stop after sliding to the target position, forming a new stable ventilation cross-section, thereby matching the changed airflow demand, and the system reaches a new operational equilibrium.

[0008] The adjustment component can be manually adjusted or automatically adjusted, such as by using a drive unit such as a motor, pneumatic or hydraulic actuator to perform real-time and precise automatic adjustment based on sensor feedback signals or preset programs.

[0009] Preferably, the inclined slide has a first inclined surface on the side facing away from the inner wall of the main tube, and the first inclined surface forms an acute angle with the axis of the main tube; the slider has a second inclined surface on the side facing the inner wall of the main tube, and the second inclined surface fits against the first inclined surface; the slider has a plane on the side facing away from the inner wall of the main tube, and the plane is parallel to the axis of the main tube.

[0010] The combination of the second and first inclined surfaces reduces the sliding resistance of the slider on the inclined slide, making the adjustment action more effortless. The ventilation channel composed of multiple planes can significantly reduce the generation of local eddies and flow separation when airflow passes through, thereby reducing ventilation resistance and airflow noise, and improving airflow efficiency.

[0011] Preferably, the adjusting assembly includes: an adjusting sleeve rotatably fitted around the outer periphery of the main tube; a driving ring located inside the main tube and threadedly connected to the main tube; the adjusting sleeve and the driving ring being connected in a transmission manner to convert the rotational motion of the adjusting sleeve into the linear motion of the driving ring along the axis of the main tube; and a slider connected to the driving ring via a radial guide structure, allowing the driving ring and the slider to slide relative to each other in the radial direction of the main tube.

[0012] When the flow area of ​​the main tube needs to be adjusted, the adjusting sleeve is rotated, thereby driving the drive ring to rotate. Since the drive ring is threadedly connected to the main tube, it moves axially while rotating. Simultaneously, the drive ring, through a connected radial guide structure, drives all the sliders to move synchronously. Because the sliders themselves are constrained on the inclined slide, the linear motion of the drive ring is transmitted through the radial guide structure as a composite motion of the sliders on the inclined slide, thus driving all the sliders to slide synchronously toward or away from the central axis of the main tube, ultimately achieving continuous adjustment of the ventilation cross-sectional area.

[0013] The threaded drive provides a precise displacement correspondence, facilitating accurate adjustment of the ventilation cross-sectional area. Furthermore, the threaded structure of the drive ring is self-locking, maintaining stability under wind force and thus preserving the stability of the ventilation cross-sectional area. In addition, integrating the adjusting sleeve and drive ring into the outer circumference and internal space of the main pipe, respectively, fully utilizes radial space, increasing the axial installation length of the system almost without adding to it, making it easy to add to or replace existing piping systems.

[0014] Preferably, the radial guide structure includes a driven ring, a plurality of guide protrusions, and a plurality of radial guide grooves. The driven ring is located between the drive ring and the slider and is rotatably connected to the drive ring. The plurality of radial guide grooves are disposed at the end of the driven ring facing the slider, and the guide protrusions are disposed at the end of the slider facing the driven ring. Alternatively, the plurality of guide protrusions are disposed at the end of the driven ring facing the slider, and the plurality of radial guide grooves are disposed at the end of the slider facing the driven ring. The guide protrusions are slidably embedded in the corresponding radial guide grooves.

[0015] When the drive ring moves axially, it drives the driven ring to move axially in sync. The driven ring then pushes all the sliders to slide synchronously along the inclined slide. During this process, the cooperation of the radial guide groove and the guide protrusion allows the sliders to slide radially relative to the driven ring in the main tube. The design of the guide protrusion and the radial guide groove decouples the axial drive of the driven ring from the necessary radial movement of the sliders. This ensures both the effective transmission of driving force and the synchronization of all sliders, while also allowing the sliders to slide smoothly along the inclined slide, thereby achieving smooth and stable continuous adjustment of the ventilation cross-sectional area.

[0016] Preferably, one end of the adjusting sleeve is provided with a limiting ring, which is sleeved on the outer periphery of the main body tube. The outer periphery of the limiting ring is provided with multiple limiting grooves, which are distributed along the circumference of the limiting ring. The adjusting sleeve also includes a locking assembly for locking the adjusting sleeve. This locking assembly includes: multiple supports, spaced apart along the circumference of the main body tube on its outer periphery; multiple locking levers, corresponding one-to-one in position and number to the supports, each locking lever rotatably mounted on its corresponding support, with the rotation axis of each locking lever perpendicular to its own axis and the axis of the main body tube; and a locking slide sleeve, axially slidably sleeved on the adjusting sleeve. The locking lever is located between the adjusting sleeve and the locking slide sleeve on the outer periphery of the main tube. The locking slide sleeve has an abutment ring at one end facing the locking lever, and the abutment ring is sleeved on the outer periphery of the main tube. The locking slide sleeve has a first position and a second position. When the locking slide sleeve slides from the second position to the first position, the outer peripheral surface of the abutment ring abuts against the first end of the locking lever, causing the locking lever to rotate until its second end is engaged in the limiting groove. When the locking slide sleeve slides from the first position to the second position, the outer peripheral surface of the abutment ring separates from the first end of the locking lever, and the locking lever can rotate until its second end exits the limiting groove.

[0017] When locking the adjusting sleeve after adjustment, push the locking sleeve towards the adjusting sleeve until it reaches the first position. During this process, the abutment ring gradually extends between the first end of the locking lever and the outer circumferential surface of the main tube. The outer circumferential surface of the abutment ring presses against the first end of the locking lever, causing it to rotate. Finally, the second end of the locking lever is engaged in the limiting groove. At this point, the locking lever cannot rotate in the reverse direction, and the circumferential rotation of the adjusting sleeve is completely restricted, resulting in a locked state. When it is necessary to release the lock on the adjusting sleeve, push the locking sleeve in the reverse direction to separate the outer circumferential surface of the abutment ring from the first end of the locking lever, releasing the pressure on the locking lever. At this point, the locking lever can rotate freely, the second end of the locking lever can exit the limiting groove, and the adjusting sleeve can rotate freely.

[0018] The adjusting sleeve can be locked and unlocked by sliding the locking sleeve, which is simpler and faster than turning screws or operating complex locks. Moreover, by using multiple locking levers to participate in locking simultaneously, the adjusting sleeve can be constrained in all directions, effectively resisting vibration and impact from any direction, preventing the adjusting sleeve from rotating in a vibrating environment, and ensuring the long-term stability of the set flow rate.

[0019] Preferably, the edges of the limiting grooves are rounded, and a protrusion is formed between two adjacent limiting grooves, the surfaces of the protrusions being arc-shaped; the second end of the locking lever is provided with a first spherical contact portion.

[0020] When the locking lever approaches the limiting groove under the pressure of the abutment ring, even if the limiting groove and the locking lever are not perfectly aligned, the first spherical contact part can smoothly slide into the limiting groove along the arc surface of the rounded corner or protrusion. When the adjusting sleeve is in the unlocked state, the locking lever has different postures, and the second end of the locking lever maintains a small gap or slight contact with the limiting ring. When the adjusting sleeve is rotated to adjust the water flow of the water pipe, the protrusion on the limiting ring forms a low-resistance sliding contact with the first spherical contact part, allowing the adjusting sleeve to rotate smoothly. The rounded corner, arc-shaped protrusion, and first spherical contact part effectively avoid mechanical interference that is easily caused by sharp corner contact, allowing the adjusting sleeve to rotate freely without external intervention, avoiding jamming, abnormal noise, and abnormal wear.

[0021] Preferably, the locking assembly further includes: a positioning sleeve fitted around the outer periphery of the main body tube; the positioning sleeve has multiple limiting through holes, which are spaced apart along the circumference of the positioning sleeve; each limiting through hole includes an unlocking hole and an arc-shaped guide hole, the unlocking hole communicating with the arc-shaped guide hole, and the arc-shaped guide hole extending along the circumference of the positioning sleeve; a locking slide sleeve located between the locking rocker arm and the positioning sleeve; the side of the locking slide sleeve facing the positioning sleeve has multiple locking pins, which extend along the circumference of the main body tube. The locking sleeves are circumferentially spaced, and the locking pins are provided with locking portions; the positioning sleeves and the locking sleeves are rotatable relative to each other, so that the locking portions can be aligned with the unlocking holes in the axial direction of the positioning sleeves; the outline and size of the unlocking holes are configured such that when the locking portions are aligned with the unlocking holes, the locking portions are allowed to pass through during the axial movement of the locking sleeves; the outline and size of the arc-shaped guide holes are configured such that when the locking portions are aligned with the arc-shaped guide holes, the locking portions are prevented from passing through, but the locking pins are allowed to pass through.

[0022] The positioning sleeve and the locking sleeve are rotatable relative to each other, including three scenarios. The first scenario is that the positioning sleeve can rotate relative to the main tube, while the locking sleeve is fixed to the main tube. The second scenario is that the positioning sleeve is circumferentially fixed to the main tube, meaning it can only slide axially and cannot rotate, while the locking sleeve can rotate relative to the main tube. The third scenario is that both the positioning sleeve and the locking sleeve can rotate relative to the main tube.

[0023] The positioning sleeve is used to lock the anti-slip sleeve, preventing it from retracting and interfering with the unlocking state of the adjusting sleeve. Taking a case where the positioning sleeve is rotatable but the anti-slip sleeve is not: To lock the anti-slip sleeve, first rotate the positioning sleeve until the unlocking hole on the positioning sleeve aligns with the locking part on the locking pin; then, push the anti-slip sleeve axially, causing the locking part to pass through the unlocking hole and reach the other side of the positioning sleeve. At this point, the pin of the locking pin also passes through the unlocking hole; then continue rotating the positioning sleeve, causing the locking pin, which has passed through the unlocking hole, to slide into the arc-shaped guide hole. Due to the circumferential design of the arc-shaped guide hole, its width allows a thinner locking pin rod to pass through, but the size of the locking part is larger than this width. Therefore, the locking part is blocked axially by the positioning sleeve and cannot retract directly. When it is necessary to release the locking sleeve, rotate the positioning sleeve in the opposite direction, causing the locking pin and its locking part to move back from the arc-shaped guide hole to the position of the unlocking hole. Once the locking part is aligned with the unlocking hole, the axial constraint is released, and the locking sleeve can retract under axial force, allowing the locking part and locking pin to pass through the unlocking hole and exit, restoring freedom of axial movement.

[0024] This design relies on the interference between the locking part and the positioning sleeve to achieve locking. The structure is robust and can withstand significant accidental loads. This locking method fundamentally prevents accidental slippage caused by vibration, impact, or long-term stress relaxation, ensuring the absolute stability of the locking sleeve's locked state. Furthermore, the entire locking function is achieved through the positioning sleeve, locking pin, and their locking part. All components are arranged around the main pipe, resulting in a compact structure that does not significantly increase the axial or radial dimensions of the device, facilitating its integration into complex pipe networks.

[0025] Preferably, the locking assembly further includes a plurality of elastic elements, each of which is fitted around the outer periphery of the locking pin, with one end of the elastic element connected to the locking sleeve and the other end used to abut against the positioning sleeve.

[0026] During the locking process of the locking sleeve, as the locking sleeve is pushed towards the positioning sleeve, the elastic element is gradually compressed, preventing rigid collisions between the locking sleeve and the positioning sleeve. When the locking sleeve is in the first position, i.e., the locking pin is located in the arc-shaped guide hole, the compressed elastic element continuously applies elastic force, causing the locking part to press against the positioning sleeve, thereby further improving the stability of the locking assembly under continuous vibration or slight impact, ensuring absolute reliability of the locked state. At the initial moment of unlocking the locking sleeve, the elastic potential energy stored in the compressed elastic element is rapidly released, pushing the locking sleeve to slide axially a certain distance, thus disengaging the locking pin from the unlocking hole, making the unlocking action of the locking sleeve faster. In addition, by directly fitting the elastic element onto the locking pin, no additional mounting structure is required, making the entire locking assembly structure simpler and more compact.

[0027] Preferably, the adjusting assembly further includes: a transmission spindle located inside the main tube and coaxially fixedly connected to the adjusting sleeve; and a driven sleeve located inside the main tube and coaxially fixedly connected to the drive ring, wherein the transmission spindle passes through the driven sleeve and slidably engages with the inner wall of the driven sleeve.

[0028] The rotational motion of the adjusting sleeve can be directly transmitted to the drive spindle, causing it to rotate synchronously. The rotation of the drive spindle drives the driven sleeve to rotate, causing the drive ring to rotate as well. The arrangement of the drive spindle and driven sleeve enables transmission between the adjusting sleeve and the drive ring, and the shorter power transmission path makes the power transmission of the adjusting sleeve more efficient. Furthermore, the drive spindle and driven sleeve are located in the central area inside the main pipe, minimizing obstruction and interference with airflow, and avoiding significant additional resistance or unnecessary turbulence. This allows for precise adjustment while maximizing the preservation of the original aerodynamic performance of the main pipe.

[0029] Secondly, the present invention also provides a heating system having the aforementioned regulating device for heating and ventilation ducts installed.

[0030] Apart from the regulating device for the heating and ventilation ducts, the other structures of this heating system are all existing technologies, therefore their specific structures and working principles will not be described in detail.

[0031] The beneficial effects of this invention are:

[0032] (1) Set up an adjustment mechanism and set up multiple circumferentially distributed inclined slides on the inner wall of the main pipe. The adjustment mechanism includes an adjustment component and a slider. The adjustment component can drive the slider to slide synchronously along the inclined slide, so that all sliders can move synchronously and equidistantly toward or away from the central axis of the main pipe, thereby realizing the continuous adjustment of the flow area of ​​the main pipe and finally realizing the adjustment of the local air volume of the heating system, avoiding the problem of uneven airflow distribution or system energy waste.

[0033] (2) The slider and the inclined slide are closely fitted by the first inclined surface and the second inclined surface, which can reduce the sliding friction resistance and make the adjustment action more effortless and smooth. At the same time, the plane on the back side of the slider is parallel to the axis of the main tube, which can reduce the eddies, separation phenomena and additional resistance generated when the airflow passes through.

[0034] (3) The adjusting sleeve of the adjusting component is placed outside the pipe for easy operation. Its rotational motion is directly transmitted to the inside of the main pipe through the transmission mandrel fixed coaxially with it. The transmission mandrel drives the driven sleeve and the drive ring fixed with it to rotate. The drive ring is threadedly connected to the pipe wall, converting its rotational motion into precise axial linear motion. This short-path and coaxial transmission setting can avoid transmission delay, has high transmission accuracy, and the self-locking property of the threaded pair can effectively resist airflow disturbance and maintain the stability of the set state.

[0035] (4) The overall structure has strong anti-vibration and anti-loosening capabilities and maintains its state. By pushing the locking sleeve, its abutment ring squeezes multiple locking levers to rotate synchronously and engage with the limiting groove of the adjusting sleeve, thus achieving full-circumferential multi-point constraint on the adjusting sleeve. This effectively resists vibration and impact from any direction, prevents the adjusting sleeve from rotating under vibration, and ensures the long-term stability of the set flow rate. By rotating the positioning sleeve, the locking part on the locking pin enters the arc-shaped guide hole through the unlocking hole, and axial locking is achieved by the mutual interference between the positioning sleeve and the locking part. The elastic element sleeved on the locking pin provides continuous clamping force, further enhancing the anti-vibration and anti-loosening performance. This structure prevents the locking sleeve from accidentally retracting under vibration, avoiding the locking sleeve retraction from affecting the unlocking state of the adjusting sleeve and ensuring the absolute stability of the locking sleeve.

[0036] (5) The groove opening of the limiting groove is rounded, and the arc-shaped protrusion and the spherical contact part are set, which can make the adjustment process of the adjusting sleeve smoother and the locking of the adjusting sleeve smoother and more efficient.

[0037] (6) The chamfered structure on the elastic element and the abutment ring can make the locking of the adjusting sleeve follow the unlocking of the locking sleeve, and make the two processes faster.

[0038] (7) The overall structure is compact and highly integrated, facilitating installation, integration, and maintenance. All adjustment and locking mechanisms are rationally arranged around the outer wall of the pipe or built into the center of the flow channel, without significantly increasing the axial length or radial dimension of the pipe. This design makes it easier to integrate the device of the present invention into the main pipe network, and construction and maintenance are more convenient. Attached Figure Description

[0039] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the external structure of an adjusting device for a heating and ventilation duct according to an embodiment of the present invention; Figure 2 for Figure 1 A half-section perspective view; Figure 3 for Figure 2 A magnified view of part A in the diagram; Figure 4 A schematic diagram showing the engagement of the locking lever with the limiting groove and the abutment ring when the adjusting sleeve is in the locked state; Figure 5 An exploded view of a portion of the structure of a regulating device for heating and ventilation ducts according to an embodiment of the present invention; Figure 6 This is an exploded view of another part of the structure of a regulating device for heating and ventilation ducts according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the installation of a regulating device for heating and ventilation ducts in a heating system according to an embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures: 1. Main tube; 2. Inclined slide rail; 201. First inclined surface; 3. Slider; 301. Second inclined surface; 302. Plane; 303. Guide protrusion; 4. Adjusting sleeve; 401. Limiting ring; 4011. Limiting groove; 4012. Protrusion; 5. Drive ring; 6. Driven ring; 601. Radial guide groove; 7. Rolling bearing; 8. Support; 9. Locking rocker arm; 901. First spherical contact part; 902. Second spherical contact part; 10. Locking sleeve; 1001. Abutment ring; 1002. Chamfered structure; 11. Positioning sleeve; 1101. Unlocking hole; 1102. Arc-shaped guide hole; 12. Locking pin; 1201. Locking part; 13. Elastic element; 14. Transmission spindle; 1401. First connecting rib; 15. Driven sleeve; 1501. Second connecting rib; 16. Mounting tube assembly. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] The following is combined Figures 1 to 7 The following describes embodiments of the present invention.

[0044] According to an embodiment of the present invention, in one aspect, a regulating device for heating and ventilation ducts is provided, combined with Figures 1 to 6 As shown, it includes: a main tube 1, with multiple inclined slides 2 on the inner wall of the main tube 1, the inclined slides 2 being distributed at intervals along the circumference of the main tube 1; and an adjustment mechanism, including an adjustment component and multiple sliders 3, each slider 3 being slidably disposed on the inclined slide 2, the adjustment component being connected to the sliders 3 for driving all sliders 3 to slide synchronously on the inclined slide 2, so that all sliders 3 move toward or away from the central axis of the main tube 1.

[0045] The regulating device for heating and ventilation ducts provided in this embodiment initially consists of multiple sliders 3 positioned on an inclined slide rail 2, collectively forming an initial ventilation cross-section. When the airflow demand in a specific area of ​​the building changes, the regulating mechanism drives all sliders 3 to slide synchronously and in the same direction along their respective inclined slide rails 2. The sliding of the sliders 3 on the inclined slide rail 2 is decomposed into two component movements: axial translation and radial movement. When the sliders 3 move away from the central axis of the main duct 1, the ventilation cross-sectional area enclosed by their inner edges increases; conversely, when the sliders 3 move towards the central axis, the ventilation cross-sectional area decreases. The sliders 3 stop after sliding to the target position, forming a new stable ventilation cross-section, thereby matching the changed airflow demand, and the system reaches a new operational equilibrium.

[0046] The inclined slides 2 are distributed circumferentially along the main tube 1, including both equal-spaced and non-uniform-spaced distributions. In this embodiment, the inclined slides 2 are distributed circumferentially at equal intervals along the main tube 1, meaning that the distance between two adjacent inclined slides 2 is the same. This ensures the uniformity of the driving load and the symmetry of the ventilation cross-section, thereby minimizing additional turbulence, airflow separation, and additional pressure loss caused by cross-sectional eccentricity or irregular shape, and ensuring stable and efficient airflow during the adjustment process.

[0047] Furthermore, the inclined slide 2 has a first inclined surface 201 on the side facing away from the inner wall of the main tube 1; the slider 3 has a second inclined surface 301 on the side facing the inner wall of the main tube 1, and the second inclined surface 301 is in contact with the first inclined surface 201; the slider 3 has a plane 302 on the side facing away from the inner wall of the main tube 1, and the plane 302 is parallel to the axis of the main tube 1.

[0048] The cooperation between the second inclined surface 301 and the first inclined surface 201 can reduce the sliding resistance of the slider 3 on the inclined slide 2, making the adjustment action more effortless. The ventilation channel composed of multiple planes 302 can significantly reduce the generation of local vortices and flow separation when airflow passes through, thereby reducing ventilation resistance and airflow noise, and improving airflow efficiency.

[0049] Optionally, the adjustment component can be manually adjusted or automatically adjusted, such as by using a drive unit such as a motor, pneumatic or hydraulic actuator to perform real-time and precise automatic adjustment based on sensor feedback signals or preset programs.

[0050] Furthermore, the adjustment assembly includes: an adjustment sleeve 4, rotatably fitted around the outer periphery of the main tube 1; a drive ring 5, located inside the main tube 1 and threadedly connected to the main tube 1; the adjustment sleeve 4 and the drive ring 5 are connected in a transmission manner to convert the rotational motion of the adjustment sleeve 4 into the linear motion of the drive ring 5 along the axis of the main tube 1; and a slider 3 is connected to the drive ring 5 through a radial guide structure, so that the drive ring 5 and the slider 3 can slide relative to each other in the radial direction of the main tube 1.

[0051] When it is necessary to adjust the flow area of ​​the main tube 1, the adjusting sleeve 4 is rotated, thereby driving the drive ring 5 to rotate. Since the drive ring 5 is threadedly connected to the main tube 1, the drive ring 5 moves axially while rotating. As the drive ring 5 moves, it drives all the sliders 3 to move synchronously through the radial guide structure connected to it. Since the sliders 3 themselves are constrained on the inclined slide 2, the linear motion of the drive ring 5 is transmitted through the radial guide structure as a composite motion of the sliders 3 on the inclined slide 2, thereby driving all the sliders 3 to slide synchronously toward or away from the central axis of the main tube 1, ultimately achieving continuous adjustment of the ventilation cross-sectional area.

[0052] The threaded drive provides a precise displacement correspondence, facilitating accurate adjustment of the ventilation cross-sectional area. Furthermore, the threaded structure of the drive ring 5 is self-locking, maintaining stability under wind force and thus preserving the stability of the ventilation cross-sectional area. In addition, integrating the adjusting sleeve 4 and the drive ring 5 into the outer circumference and internal space of the main pipe 1 respectively fully utilizes the radial space, increasing the axial installation length of the system by almost nothing, making it easy to add to or replace existing piping systems.

[0053] Furthermore, the radial guide structure includes a driven ring 6, multiple guide protrusions 303, and multiple radial guide grooves 601. The driven ring 6 is located between the drive ring 5 and the slider 3, and is rotatably connected to the drive ring 5. The multiple radial guide grooves 601 are disposed at one end of the driven ring 6 facing the slider 3, and the guide protrusions 303 are disposed at one end of the slider 3 facing the driven ring 6. Alternatively, the multiple guide protrusions 303 are disposed at one end of the driven ring 6 facing the slider 3, and the multiple radial guide grooves 601 are disposed at one end of the slider 3 facing the driven ring 6. The guide protrusions 303 are slidably embedded in the corresponding radial guide grooves 601.

[0054] When the drive ring 5 moves axially, it drives the driven ring 6 to move axially in sync. The driven ring 6 then pushes all the sliders 3 to slide synchronously along the inclined slide 2. During this process, due to the cooperation between the radial guide groove 601 and the guide protrusion 303, the sliders 3 can slide radially relative to the driven ring 6 in the main tube 1. The arrangement of the guide protrusion 303 and the radial guide groove 601 decouples the axial drive of the driven ring 6 from the necessary radial movement of the sliders 3, ensuring both the effective transmission of driving force and the synchronization of all sliders 3, while also allowing the sliders 3 to slide smoothly along the inclined slide 2, thereby achieving smooth and stable continuous adjustment of the ventilation cross-sectional area.

[0055] Specifically, the driven ring 6 and the driving ring 5 are connected by a rolling bearing 7.

[0056] Furthermore, one end of the adjusting sleeve 4 is provided with a limiting ring 401, which is sleeved on the outer periphery of the main body tube 1. Multiple limiting grooves 4011 are provided on the outer periphery of the limiting ring 401, distributed along the circumference of the limiting ring 401. It also includes a locking assembly for locking the adjusting sleeve 4, comprising: multiple supports 8, evenly and spaced along the circumference of the main body tube 1 on its outer periphery; multiple locking levers 9, corresponding one-to-one in position and number to the supports 8, each locking lever 9 rotatably mounted on its corresponding support 8, with the rotation axis of each locking lever 9 perpendicular to its own axis and also perpendicular to the axis of the main body tube 1; and a locking sliding sleeve 10, which can slide axially. The locking slide 10 is located between the adjusting sleeve 4 and the locking slide 10, with the locking slide 10 having an abutment ring 1001 at one end facing the locking slide 9. The locking slide 10 has a first position and a second position. When the locking slide 10 slides from the second position to the first position, the outer circumferential surface of the abutment ring 1001 abuts against the first end of the locking slide 9, causing the locking slide 9 to rotate until its second end is engaged in the limiting groove 4011. When the locking slide 10 slides from the first position to the second position, the outer circumferential surface of the abutment ring 1001 separates from the first end of the locking slide 9, allowing the locking slide 9 to rotate until its second end exits the limiting groove 4011.

[0057] When adjusting sleeve 4 needs to be locked after adjustment, push locking sleeve 10 towards adjusting sleeve 4 until locking sleeve 10 reaches the first position. During this process, abutment ring 1001 gradually extends between the first end of locking swing rod 9 and the outer circumferential surface of main tube 1, pressing the first end of locking swing rod 9 against the outer circumferential surface of the abutment ring, causing locking swing rod 9 to rotate, and finally causing the second end of locking swing rod 9 to be engaged in limiting groove 4011. At this time, locking swing rod 9 cannot rotate in the reverse direction, and the circumferential rotation of adjusting sleeve 4 is completely restricted, and it is in a locked state. When it is necessary to release the lock on adjusting sleeve 4, push locking sleeve 10 in the reverse direction to separate the outer circumferential surface of abutment ring 1001 from the first end of locking swing rod 9, releasing the pressure on locking swing rod 9. At this time, locking swing rod 9 can rotate freely, the second end of locking swing rod 9 can exit limiting groove 4011, and adjusting sleeve 4 can rotate freely.

[0058] The adjusting sleeve 4 can be locked and unlocked by sliding the locking sleeve 10, which is simpler and faster than turning screws or operating complex locks. Moreover, by using multiple locking levers 9 to lock simultaneously, the adjusting sleeve 4 can be constrained in all directions, effectively resisting vibration and impact from any direction, preventing the adjusting sleeve 4 from rotating in a vibration environment, and ensuring the long-term stability of the set flow rate.

[0059] Furthermore, the edges of the limiting grooves 4011 are all rounded, and a protrusion 4012 is formed between two adjacent limiting grooves 4011, and the surface of the protrusion 4012 is an arc-shaped surface; the second end of the locking lever 9 is provided with a first spherical contact part 901.

[0060] When the locking lever 9 approaches the limiting groove 4011 under the pressure of the abutment ring 1001, even if the limiting groove 4011 and the locking lever 9 are not perfectly aligned, the first spherical contact portion 901 can smoothly slide into the limiting groove 4011 along the arc surface of the rounded corner or protrusion 4012. When the adjusting sleeve 4 is in the unlocked state, the locking lever 9 has different postures, and the second end of the locking lever 9 maintains a small gap or slight contact with the limiting ring 401. When the adjusting sleeve 4 is rotated to adjust the water flow of the water pipe, the protrusion 4012 on the limiting ring 401 forms a low-resistance sliding contact with the first spherical contact portion 901, allowing the adjusting sleeve 4 to rotate smoothly. The rounded corner, the arc-shaped protrusion 4012, and the first spherical contact portion 901 effectively avoid mechanical interference that is easily caused by sharp corner contact, allowing the adjusting sleeve 4 to rotate freely without external intervention, avoiding jamming, abnormal noise, and abnormal wear.

[0061] Furthermore, the locking assembly also includes: a positioning sleeve 11, fitted around the outer periphery of the main body tube 1, the positioning sleeve 11 having multiple limiting through holes, the multiple limiting through holes being evenly spaced along the circumference of the positioning sleeve 11, each limiting through hole including an unlocking hole 1101 and an arc-shaped guide hole 1102, the unlocking hole 1101 communicating with the arc-shaped guide hole 1102, the arc-shaped guide hole 1102 extending along the circumference of the positioning sleeve 11; and a locking slide sleeve 10 located between the locking rocker arm 9 and the positioning sleeve 11, the side of the locking slide sleeve 10 facing the positioning sleeve 11 having multiple locking pins 12, the locking pins 12 extending along the circumference of the locking slide sleeve 10. The locking pins 12 are evenly spaced, and each end of the locking pin 12 has a locking portion 1201. The positioning sleeve 11 and the locking slide sleeve 10 are rotatable relative to each other, so that the locking portion 1201 can be aligned with the unlocking hole 1101 in the axial direction of the positioning sleeve 11. The outline and size of the unlocking hole 1101 are configured such that when the locking portion 1201 is aligned with the unlocking hole 1101, the locking portion 1201 is allowed to pass through during the axial movement of the locking slide sleeve 10. The outline and size of the arc-shaped guide hole 1102 are configured such that when the locking portion 1201 is aligned with the arc-shaped guide hole 1102, the locking portion 1201 is prevented from passing through, but the locking pin 12 is allowed to pass through.

[0062] The positioning sleeve 11 and the locking sleeve 10 can rotate relative to each other in three ways. In the first way, the positioning sleeve 11 can rotate relative to the main tube 1, while the locking sleeve 10 is fixed to the main tube 1. In the second way, the positioning sleeve 11 is circumferentially fixed to the main tube 1, meaning it can only slide axially and cannot rotate, while the locking sleeve 10 can rotate relative to the main tube 1. In the third way, both the positioning sleeve 11 and the locking sleeve 10 can rotate relative to the main tube 1. In this embodiment, the positioning sleeve 11 can rotate, while the locking sleeve 10 cannot.

[0063] The positioning sleeve 11 is used to lock the anti-slip sleeve 10 to prevent it from retracting and interfering with the unlocking state of the adjusting sleeve 4. When locking the anti-slip sleeve 10, first rotate the positioning sleeve 11 until the unlocking hole 1101 on the positioning sleeve 11 is aligned with the locking part 1201 on the locking pin 12; then, push the anti-slip sleeve 10 axially so that the locking part 1201 passes through the unlocking hole 1101 and reaches the other side of the positioning sleeve 11. At this time, the pin body of the locking pin 12 also passes through the unlocking hole 1101; then continue to rotate the positioning sleeve 11 so that the locking pin 12, which has passed through the unlocking hole 1101, slides into the arc-shaped guide hole 1102; due to the contour design of the arc-shaped guide hole 1102 extending circumferentially along the positioning sleeve 11, its width allows the thinner rod of the locking pin 12 to pass through, but the size of the locking part 1201 is larger than this width. Therefore, the locking part 1201 is blocked axially by the positioning sleeve 11 and cannot retract directly. When it is necessary to release the locking sleeve 10, rotate the positioning sleeve 11 in the opposite direction, so that the locking pin 12 and its locking part 1201 move back from the arc-shaped guide hole 1102 to the unlocking hole 1101. Once the locking part 1201 is aligned with the unlocking hole 1101, the axial constraint is released, and the locking sleeve 10 can retract under axial force, so that the locking part 1201 and the locking pin 12 pass through the unlocking hole 1101 and exit, restoring free axial movement.

[0064] This design relies on the interference between the locking part 1201 and the positioning sleeve 11 to achieve locking. The structure is robust and can withstand significant accidental loads. This locking method fundamentally prevents accidental slippage caused by vibration, impact, or long-term stress relaxation, ensuring the absolute stability of the locking sleeve 10 in its locked state. Furthermore, the entire locking function is achieved through the positioning sleeve 11, the locking pin 12, and its locking part 1201. All components are arranged around the main tube 1, resulting in a compact structure that does not significantly increase the axial or radial dimensions of the device, facilitating its integration into complex pipe networks.

[0065] Furthermore, the locking assembly also includes a plurality of elastic elements 13, which are springs. Each elastic element 13 is fitted around the outer periphery of the locking pin 12, and one end of the elastic element 13 is connected to the locking slide sleeve 10, while the other end is used to abut against the positioning sleeve 11.

[0066] During the locking process of the locking sleeve 10, as the locking sleeve 10 is pushed towards the positioning sleeve 11, the elastic element 13 is gradually compressed. This process avoids rigid collision between the locking sleeve 10 and the positioning sleeve 11. When the locking sleeve 10 is in the first position, i.e., the locking pin 12 is located in the arc-shaped guide hole 1102, the compressed elastic element 13 continuously applies elastic force, causing the locking part 1201 to press against the positioning sleeve 11, thereby further improving the stability of the locking assembly under continuous vibration or slight impact, ensuring the absolute reliability of the locked state. At the initial moment of unlocking the locking sleeve 10, the elastic potential energy stored in the compressed elastic element 13 is rapidly released, pushing the locking sleeve 10 to slide axially a certain distance, thus causing the locking pin 12 to exit the unlocking hole 1101. This makes the unlocking action of the locking sleeve 10 faster. In addition, by directly fitting the elastic element 13 onto the locking pin 12, no additional installation structure is required, making the structure of the entire locking assembly simpler and more compact.

[0067] Furthermore, the first end of the locking lever 9 is provided with a chamfered structure 1002, which is a bevel formed on the outer edge of the abutment ring 1001. At the instant the locking sleeve 10 moves axially under the elastic force of the elastic element 13 and the abutment ring 1001 begins to contact the locking lever 9, the bevel of the chamfered structure 1002 can preferentially contact the first end of the locking lever 9. As the locking sleeve 10 continues to move, the bevel of the chamfered structure 1002 smoothly and gradually guides the first end of the locking lever 9 to the cylindrical outer circumferential surface of the abutment ring 1001, thereby causing the locking lever 9 to swing until its second end extends into the limiting groove 4011, ultimately locking the adjusting sleeve 4. The chamfered structure 1002 avoids the hard impact and instantaneous high resistance that may occur at right-angled edges, resulting in a smaller starting force, smoother operation, and lower noise during the locking process, and effectively reduces deformation or wear of the locking lever 9 due to impact. The coordinated arrangement of the elastic element 13 and the chamfer structure 1002 allows the locking of the adjusting sleeve 4 to immediately follow the unlocking of the locking sleeve 10, making both processes faster.

[0068] Furthermore, the first end of the locking lever 9 is provided with a second spherical contact portion 902. The second spherical contact portion 902 allows the locking lever 9 to be smoothly guided to the outer peripheral surface of the abutment ring 1001 with less resistance.

[0069] Furthermore, the adjustment assembly also includes: a transmission spindle 14, located inside the main tube 1 and coaxially fixedly connected to the adjustment sleeve 4; and a driven sleeve 15, located inside the main tube 1 and coaxially fixedly connected to the drive ring 5. The transmission spindle 14 passes through the driven sleeve 15 and slidably engages with the inner wall of the driven sleeve 15. Specifically, the transmission spindle 14 is connected to the adjustment sleeve 4 via multiple first connecting ribs 1401, which are evenly spaced along the circumference of the adjustment sleeve 4. The driven sleeve 15 is connected to the drive ring 5 via multiple second connecting ribs 1501, which are evenly spaced along the circumference of the adjustment sleeve 4. The positions of the second connecting ribs 1501 and the first connecting ribs 1401 correspond one-to-one, that is, they coincide in the axial direction of the adjustment sleeve 4.

[0070] The rotational motion of the adjusting sleeve 4 can be directly transmitted to the transmission spindle 14, causing it to rotate synchronously. When the transmission spindle 14 rotates, it drives the driven sleeve 15 to rotate, causing the drive ring 5 to rotate as well. The arrangement of the transmission spindle 14 and the driven sleeve 15 enables the transmission between the adjusting sleeve 4 and the drive ring 5, and the power transmission path is short, making the power transmission of the adjusting sleeve 4 more efficient. Furthermore, the transmission spindle 14 and the driven sleeve 15 are located in the central area inside the main pipe 1, minimizing obstruction and interference to the airflow, and avoiding significant additional resistance or unnecessary turbulence. This allows for precise adjustment while maximizing the preservation of the original aerodynamic performance of the main pipe.

[0071] According to an embodiment of the present invention, in another aspect, a heating system is also provided, combined with Figures 1 to 7 As shown, it is equipped with the aforementioned regulating device for heating and ventilation ducts. Specifically, the heating system includes a mounting pipe assembly 16, one end of which is connected to the end of the regulating sleeve 4 facing away from the main pipe 1.

[0072] Apart from the regulating device for the heating and ventilation ducts, the other structures of this heating system are all existing technologies, therefore their specific structures and working principles will not be described in detail.

[0073] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A regulating device for heating and ventilation ducts, characterized in that, include: The main tube (1) has multiple inclined slides (2) on its inner wall, and the inclined slides (2) are distributed at intervals along the circumference of the main tube (1). The adjustment mechanism includes an adjustment component and a plurality of sliders (3), each slider (3) being slidably disposed on the inclined slide (2). The adjustment component is connected to the sliders (3) and is used to drive all the sliders (3) to slide synchronously on the inclined slide (2) so that all the sliders (3) move toward or away from the central axis of the main tube (1).

2. The regulating device for heating and ventilation ducts according to claim 1, characterized in that, The inclined slide (2) has a first inclined surface (201) on the side facing away from the inner wall of the main tube (1), and the first inclined surface (201) forms an acute angle with the axis of the main tube (1); the slider (3) has a second inclined surface (301) on the side facing the inner wall of the main tube (1), and the second inclined surface (301) fits against the first inclined surface (201); the slider (3) has a plane (302) on the side facing away from the inner wall of the main tube (1), and the plane (302) is parallel to the axis of the main tube (1).

3. The regulating device for heating and ventilation ducts according to claim 1, characterized in that, The adjustment component includes: An adjusting sleeve (4) is rotatably fitted around the outer periphery of the main tube (1); The drive ring (5) is located inside the main tube (1) and is threadedly connected to the main tube (1). The adjusting sleeve (4) is connected to the drive ring (5) in a transmission manner so as to convert the rotational motion of the adjusting sleeve (4) into the linear motion of the drive ring (5) along the axis of the main tube (1). The slider (3) is connected to the drive ring (5) through a radial guide structure, so that the drive ring (5) and the slider (3) can slide relative to each other in the radial direction of the main tube (1).

4. The regulating device for heating and ventilation ducts according to claim 3, characterized in that, The radial guide structure includes a driven ring (6), a plurality of guide protrusions (303), and a plurality of radial guide grooves (601). The driven ring (6) is located between the drive ring (5) and the slider (3) and is rotatably connected to the drive ring (5). The plurality of radial guide grooves (601) are disposed at one end of the driven ring (6) facing the slider (3), and the guide protrusions (303) are disposed at one end of the slider (3) facing the driven ring (6). Alternatively, the plurality of guide protrusions (303) are disposed at one end of the driven ring (6) facing the slider (3), and the plurality of radial guide grooves (601) are disposed at one end of the slider (3) facing the driven ring (6). The guide protrusions (303) are slidably embedded in the corresponding radial guide grooves (601).

5. The regulating device for heating and ventilation ducts according to claim 3, characterized in that, One end of the adjusting sleeve (4) is provided with a limiting ring (401), the limiting ring (401) is sleeved on the outer periphery of the main tube (1), and a plurality of limiting grooves (4011) are provided on the outer periphery of the limiting ring (401), the plurality of limiting grooves (4011) are distributed along the circumference of the limiting ring (401); It also includes a locking assembly for locking the adjusting sleeve (4), comprising: Multiple supports (8) are spaced apart on the outer periphery of the main tube (1) along the circumference of the main tube (1); Multiple locking swing rods (9) correspond one-to-one with the support (8) in terms of position and number. The locking swing rods (9) are rotatably mounted on the corresponding support (8). The rotation axis of each locking swing rod (9) is perpendicular to its own axis and perpendicular to the axis of the main tube (1). A locking sleeve (10) is axially slidably fitted around the outer periphery of the main tube (1). The locking rocker arm (9) is located between the adjusting sleeve (4) and the locking sleeve (10). An abutment ring (1001) is provided at one end of the locking sleeve (10) facing the locking rocker arm (9). The abutment ring (1001) is fitted around the outer periphery of the main tube (1). The locking sleeve (10) has a first position and a second position. When the locking sleeve (10) slides from the second position to the first position, the outer peripheral surface of the abutment ring (1001) abuts against the first end of the locking swing rod (9), causing the locking swing rod (9) to rotate until its second end is engaged in the limiting groove (4011). When the locking sleeve (10) slides from the first position to the second position, the outer peripheral surface of the abutment ring (1001) separates from the first end of the locking swing rod (9), and the locking swing rod (9) can rotate until its second end exits the limiting groove (4011).

6. The regulating device for heating and ventilation ducts according to claim 5, characterized in that, The edges of the limiting grooves (4011) are all rounded, and a protrusion (4012) is formed between two adjacent limiting grooves (4011). The surfaces of the protrusions (4012) are all arc-shaped. The second end of the locking lever (9) is provided with a first spherical contact part (901).

7. The regulating device for heating and ventilation ducts according to claim 5, characterized in that, The locking component further includes: A positioning sleeve (11) is fitted around the outer periphery of the main tube (1). The positioning sleeve (11) has multiple limiting through holes. The multiple limiting through holes are distributed at intervals along the circumference of the positioning sleeve (11). Each limiting through hole includes an unlocking hole (1101) and an arc-shaped guide hole (1102). The unlocking hole (1101) communicates with the arc-shaped guide hole (1102). The arc-shaped guide hole (1102) extends along the circumference of the positioning sleeve (11). The locking sleeve (10) is located between the locking rocker arm (9) and the positioning sleeve (11). On the side of the locking sleeve (10) facing the positioning sleeve (11), there are a plurality of locking pins (12). The locking pins (12) are distributed at intervals along the circumference of the locking sleeve (10). The locking pins (12) are provided with a locking part (1201). The positioning sleeve (11) and the locking sleeve (10) can rotate relative to each other, so that the locking part (1201) can be aligned with the unlocking hole (1101) in the axial direction of the positioning sleeve (11). The outline and size of the unlocking hole (1101) are configured such that when the locking part (1201) is aligned with the unlocking hole (1101), the locking part (1201) is allowed to pass through during the axial movement of the locking sleeve (10); The outline and dimensions of the arc-shaped guide hole (1102) are configured such that when the locking part (1201) is aligned with the arc-shaped guide hole (1102), the locking part (1201) is prevented from passing through, but the locking pin (12) is allowed to pass through.

8. The regulating device for heating and ventilation ducts according to claim 7, characterized in that, The locking assembly also includes a plurality of elastic elements (13), each of which is fitted around the outer periphery of the locking pin (12), and one end of the elastic element (13) is connected to the locking sleeve (10), and the other end is used to abut against the positioning sleeve (11).

9. The regulating device for heating and ventilation ducts according to any one of claims 3 to 8, characterized in that, The adjustment component further includes: The transmission spindle (14) is located inside the main tube (1) and is coaxially fixedly connected to the adjusting sleeve (4); The driven sleeve (15) is located inside the main tube (1) and is coaxially fixedly connected to the drive ring (5). The transmission spindle (14) passes through the driven sleeve (15) and is slidably engaged with the inner wall of the driven sleeve (15).

10. A heating system, characterized in that, The heating and ventilation duct is equipped with a regulating device as claimed in any one of claims 1 to 9.

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