A thermal door device
By using a laminated door panel structure and a pull-rope drive system, combined with sealing strips, the synchronous opening, closing, and sealing of multi-layer insulated doors are achieved, solving the problems of thermal bridge loss and asynchronous ventilation, and improving the insulation effect and ventilation control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI ZENG XIN HUSBANDRY TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-29
AI Technical Summary
Existing multi-layer linkage insulated door devices suffer from cold bridging heat loss and asynchronous ventilation, affecting energy consumption and poultry health.
It adopts a laminated door panel structure and a pull rope drive structure, combined with horizontal and vertical sealing strips. Through the coordinated work of drive motor, pulley, pull rope, sling and drive ring, it can realize the synchronous opening and closing and sealing of multiple door panels.
It effectively reduces heat loss, ensures stable temperature inside the shed, enables precise control of ventilation, and reduces energy consumption and maintenance costs in animal husbandry.
Smart Images

Figure CN224290997U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of poultry farming equipment, specifically a heat-insulating door device. Background Technology
[0002] In modern intensive poultry farming, environmental control in poultry houses directly impacts farming efficiency. In winter, maintaining the house temperature requires minimizing heat loss; in summer, ventilation is essential to reduce temperature and harmful gas concentrations. Insulated doors, as crucial ventilation and insulation equipment in poultry houses, directly affect energy costs and poultry health.
[0003] However, existing multi-layer linkage insulated door systems generally use door frame pulleys and horizontal suspension cables to achieve linkage opening, but unavoidable gaps exist between layers, forming "cold bridges." In winter, cold air directly enters the house through these cold bridges, increasing the load on the heating system. This heat loss not only increases fuel costs but may also cause temperature fluctuations inside the house, affecting poultry growth. Furthermore, the existing pull-rope drive system of multi-layer insulated doors makes it difficult to achieve synchronous opening of multiple door panels, resulting in inconsistent opening angles and hindering effective ventilation control. This not only affects ventilation but may also lead to uneven temperature distribution inside the house, with some areas becoming excessively hot, impacting poultry growth and health. Utility Model Content
[0004] The purpose of this invention is to provide a heat-insulating door device. This heat-insulating door device, through a laminated door panel structure and a pull rope drive structure, can solve the problems of cold bridge heat loss and asynchronous ventilation in the prior art, and achieve the dual goals of efficient heat preservation in winter and uniform ventilation in summer, thereby reducing energy consumption and maintenance costs in aquaculture.
[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a heat-insulating door device, including a door frame;
[0006] A ventilation opening is provided on the door frame;
[0007] Multiple door panels are respectively installed over the ventilation opening, and the bottom of each door panel is hinged to the door frame, with the top of the lower door panel pressed against the bottom of the upper door panel;
[0008] A drive structure is provided between the door frame and the multiple door panels, which can realize the synchronous opening and closing of the multiple door panels on the multiple ventilation openings.
[0009] In some embodiments, a transverse sealing strip is also included, which is disposed transversely at the top of the door panel.
[0010] In some embodiments, a plurality of side edges are also included, which are symmetrically arranged on both sides of the plurality of door panels.
[0011] In some embodiments, a vertical sealing strip is further included, which is vertically disposed on the side.
[0012] In some embodiments, the drive structure includes a drive motor, which is mounted on the door frame;
[0013] Multiple pulleys are provided on both sides of the door frame;
[0014] A spring, the spring being disposed on the door frame;
[0015] A pull rope, one end of which is connected to the drive motor, and the other end is connected to the spring and is rotatably connected to multiple pulleys. The pull rope forms multiple equally spaced lateral movement segments at the ventilation opening.
[0016] A sling, wherein the sling is disposed between the lateral moving section and the top of the door panel;
[0017] A drive ring is disposed inside the ventilation opening and is provided through the pull rope and the sling.
[0018] In some embodiments, the drive structure further includes a tensioning assembly disposed between the sling and the top of the door panel.
[0019] In some embodiments, the tensioning assembly includes a retaining buckle, which is detachably disposed on the top of the door panel and through which the suspension cable passes;
[0020] An adjusting hollow screw is screwed into the fixing buckle, and the adjusting hollow screw is provided with the sling through it;
[0021] A locking nut is screwed into the adjusting hollow screw, which can fix the sling on the adjusting hollow screw.
[0022] In some embodiments, the fixing buckle includes a fixing ring, which is disposed on the top of the door panel near the drive ring;
[0023] A fixing pin is provided, one end of which passes through the top of the door panel and is snapped together with the fixing ring. The fixing pin is also coaxially provided with a threaded hole, and the adjusting hollow screw is screwed into the threaded hole.
[0024] In summary, this utility model has the following beneficial effects:
[0025] (1) This utility model adopts a laminated layer method, that is, the top of the lower door panel is pressed onto the bottom of the upper door panel, which can reduce the gap between the layers, reduce the possibility of heat transfer through cold bridge, thereby reducing the heat loss in winter, reducing energy consumption, and reducing breeding costs.
[0026] (2) This utility model enhances the sealing performance of the door panel by using horizontal and vertical sealing strips, reduces air leakage, blocks air flow, maintains stable temperature inside the house, and further reduces heating loss in winter.
[0027] (3) This utility model achieves the synchronous opening and closing of multiple door panels at the ventilation openings through the coordinated work of the drive motor, pulley, pull rope, sling and drive ring. It ensures the consistency of ventilation volume and can accurately control the ventilation volume in the building according to actual needs, thereby improving the ventilation effect.
[0028] (4) This utility model adjusts the tension of the sling by using a tensioning component to ensure the smoothness and synchronicity of the door panel during opening and closing, avoiding the problem of gaps or inconsistent opening angles between the two layers, thereby ensuring the effectiveness and stability of ventilation control in summer. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the structure of this utility model;
[0030] Figure 2 This is a schematic diagram of the structure of the multiple door panels of this utility model;
[0031] Figure 3 This is a top view of the present invention with multiple door panels removed;
[0032] Figure 4 This is a schematic diagram of the connection structure between the sling, the rope, and the adjusting control screw of this utility model;
[0033] Figure 5 This is a cross-sectional view showing the connection between the adjusting hollow screw, locking nut, fixing ring, fixing pin, and door panel of this utility model.
[0034] In the diagram: 1. Door frame; 2. Ventilation opening; 3. Door panel; 4. Drive structure; 41. Drive motor; 42. Pulley; 43. Pull rope; 44. Sling; 45. Drive ring; 46. Adjusting hollow screw; 47. Locking nut; 48. Fixing ring; 49. Fixing pin; 5. Side; 6. Horizontal sealing strip; 7. Vertical sealing strip. Detailed Implementation
[0035] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0036] refer to Figure 1-5 An insulated door device includes a door frame 1, a vent 2, multiple door panels 3, and a drive structure 4. The door frame 1 is the supporting structure of the entire insulated door device and provides the installation base for other components. The door frame 1 can be made of thermally broken aluminum alloy. The vent 2 is located on the door frame 1, allowing air to pass through when needed to achieve uniform ventilation. Multiple vertical beams are provided inside the vent 2. Multiple door panels 3 are respectively covered on the vent 2. The door panels 3 can be made of galvanized steel sheet, and the bottom of the door panel 3 is hinged to the vertical beam, allowing the door panel 3 to rotate around the bottom, thereby realizing the opening and closing of the vent 2. The top of the lower door panel 3 is pressed onto the bottom of the upper door panel 3. This laminated layer method can solve the sealing cold bridge problem between multiple door panels 3 (cold bridge is existing technology and will not be described in detail here). When the lower door panel 3 is closed, its top is tightly pressed against the bottom of the upper door panel 3, reducing the gap for air passage and reducing the possibility of heat transfer. The drive structure 4 is located between the door frame 1 and multiple door panels 3, which can realize the synchronous opening and closing of multiple door panels 3 on multiple ventilation openings 2, thereby achieving the synchronization of multiple door panels 3, making the opening angle of each door panel 3 consistent, and realizing effective control of ventilation volume.
[0037] In some embodiments, a transverse sealing strip 6 is further included. The transverse sealing strip 6 is horizontally disposed on the top of the door panel 3. A groove may be horizontally provided on the top of the door panel 3, and the transverse sealing strip 6 is inserted into the groove. The transverse sealing strip 6 can enhance the sealing performance between the top of the door panel 3 and the adjacent door panel 3 or door frame 1, and reduce air leakage. The transverse sealing strip 6 may be made of wear-resistant and aging-resistant rubber to ensure long-term sealing performance.
[0038] In some embodiments, the system further includes multiple side panels 5, which may be made of galvanized steel sheets. The multiple side panels 5 are symmetrically arranged on both sides of multiple door panels 3 and can be welded and fixed. The side panels 5 can increase the structural strength of the door panels 3 and at the same time reduce the gap between the two sides of the door panels 3 and the door frame 1.
[0039] In some embodiments, a vertical sealing strip 7 is also included, which is vertically disposed on the side 5 and can be fixed by screws. The vertical sealing strip 7 cooperates with the horizontal sealing strip 6 to achieve multi-directional sealing of the door panel 3, further improving the sealing performance of the insulated door device. The vertical sealing strip 7 can be made of wear-resistant and aging-resistant rubber to ensure long-term sealing performance.
[0040] In some embodiments, the drive structure 4 includes a drive motor 41, multiple pulleys 42, a spring, a pull rope 43, a sling 44, and a drive ring 45. The drive motor 41 is mounted on the door frame 1 and can be fixed with bolts. It serves as the drive power source and can be a DC geared motor, providing power for the opening and closing of the door panel 3. The drive motor 41 can be a dual-axis motor, with winches on both sides. The winches are connected to the pull rope 43, thereby enabling the pull rope 43 to move. Multiple pulleys 42 are located on both sides of the door frame 1 and can be fixed with brackets, allowing them to rotate on the door frame 1. This changes the direction of movement of the pull rope 43 and reduces friction between the pulleys 42 and the pull rope 43, thus reducing wear. The number of pulleys 42 can be designed according to actual needs. The spring is mounted on the door frame 1. One end of the pull rope is fixedly connected to the drive motor 41, and the other end is connected to the spring and rolledly connected to multiple pulleys 42. The pull rope 43 forms multiple equally spaced lateral moving segments at the ventilation opening 2. The direction of the pull rope 43 and the number of springs are also considered. The design can be customized to ensure that each door panel 3 has a lateral moving section at the top corresponding to the ventilation opening 2. Driven by the motor 41, the pull rope 43, through the pulley 42, causes the spring to deform, achieving lateral movement of the lateral moving section at the top of the ventilation opening 2. The pull rope 43 can be made of aramid fiber rope. A suspension cable 44, which can be made of stainless steel wire rope, is located between the lateral moving section and the top of the door panel 3. This cable transmits the movement of the pull rope 43 to the door panel 3, allowing the door panel 3 to follow the pull. The door panel 3 opens or closes due to the movement of the rope 43. The drive ring 45 is located on the vertical beam inside the ventilation opening 2. The drive ring 45 can be made of aluminum alloy and has the pull rope 43 and the suspension cable 44 running through it. The drive ring 45 guides and fixes the pull rope 43 and the suspension cable 44, ensuring the stability of the pull rope 43 and the suspension cable 44 during movement. It can also change the direction of movement of the suspension cable 44, making the suspension cable 44 form an L-shape between the pull rope 43 and the top of the door panel 3, so that the door panel 3 can open or close following the movement of the pull rope 43. The connection point of the suspension cable 44 between the ventilation opening 2 and the lateral movement section can be set on the left or right side of the drive ring 45 according to the actual situation, so that even when the movement directions of different lateral movement sections are opposite, the suspension cable 44 can still ensure the synchronous opening and closing of the door panel 3, thereby realizing the synchronous movement of multiple door panels 3.
[0041] In some embodiments, the drive structure 4 further includes a tensioning component disposed between the suspension cable 44 and the top of the door panel 3. The tensioning component can adjust the tension of the suspension cable 44 to ensure the smoothness and synchronicity of the door panel 3 during opening and closing.
[0042] In some embodiments, the tensioning assembly includes a retaining buckle, an adjusting hollow screw 46, and a locking nut 47. The retaining buckle is detachably mounted on the top of the door panel 3 and has a sling 44 passing through it. The retaining buckle provides a mounting base for the sling 44, enabling a reliable connection between the sling 44 and the door panel 3. The adjusting hollow screw 46 is screwed into the retaining buckle, and a through hole is provided in the middle of the adjusting hollow screw 46 for the sling 44 to pass through. By rotating the adjusting hollow screw 46, the position of the sling 44 in the retaining buckle can be adjusted, thereby changing the tension of the sling 44. The locking nut 47 is screwed into the adjusting hollow screw 46, securing the sling 44 to the adjusting hollow screw 46. After adjusting the tension of the sling 44, the locking nut 47 secures the sling 44 to the adjusting hollow screw 46, preventing it from loosening.
[0043] In some embodiments, the fixing buckle includes a fixing ring 48 and a fixing pin 49. The fixing ring 48 is located on the top of the door panel 3 near the drive ring 45. One end of the fixing pin 49 passes through the top of the door panel 3 and is snapped together with the fixing ring 48. This is prior art and will not be described in detail here. It can realize a detachable connection between the fixing buckle and the door panel 3. The fixing pin 49 is coaxially provided with a threaded hole, and an adjusting hollow screw 46 is screwed into the threaded hole.
[0044] The specific working principle is as follows:
[0045] When the insulation door needs to be opened, the drive motor 41 starts working after receiving the opening signal. The drive motor 41 pulls the pull rope 43 connected to it through the winches on both sides, and the pull rope 43 starts to move. Through the transmission of the pulley 42, the pull rope 43 can drive the lateral moving section to slide smoothly laterally in the ventilation opening 2.
[0046] As the pull rope 43 slides laterally, the sling 44 follows the pull rope 43 and slides laterally, releasing the top of the door panel 3. Since the bottom of the door panel 3 is hinged to the door frame 1, the door panel 3 will rotate around the bottom under the influence of its own weight, thereby opening the vent 2.
[0047] When the insulated door needs to be closed, the drive motor 41 receives the closing signal and reverses its operation. The drive motor 41 pulls the pull rope 43 in the opposite direction via the winches on both sides, causing the pull rope 43 to move in the opposite direction. Under the reverse movement of the pull rope 43, the sling 44 applies a reverse pulling force to the top of the door panel 3. Under the reverse pulling force of the sling 44, the door panel 3 rotates in the opposite direction around its bottom, gradually closing the vent 2. The top of the lower door panel 3 is pressed against the bottom of the upper door panel 3. This laminated layer method can solve the problem of sealing and cold bridging between multiple door panels 3. When the lower door panel 3 is closed, its top is tightly pressed against the bottom of the upper door panel 3, reducing the gap for air passage and reducing the possibility of heat transfer. Multiple door panels 3 are closed synchronously under the action of the drive structure 4, and the closing state of each layer of door panels 3 is consistent.
[0048] Throughout the opening and closing process, the horizontal sealing strip 6 and the vertical sealing strip 7 cooperate with the door panel 3, the side edges 5, and the door frame 1 to achieve multi-directional sealing of the door panel 3, further improving the sealing performance of the insulated door device. Multiple side edges 5 increase the structural strength of the door panel 3 while reducing the gaps between the sides of the door panel 3 and the door frame 1.
[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A heat-insulating door device, characterized in that: Including the door frame (1); Ventilation opening (2), the ventilation opening (2) is provided on the door frame (1); Multiple door panels (3) are evenly spaced and covered on the ventilation opening (2), and the bottom of the door panel (3) is hinged to the door frame (1), and the top of the lower door panel (3) is pressed against the bottom of the upper door panel (3); The drive structure (4) is located between the door frame (1) and the multiple door panels (3), and can realize the synchronous opening and closing of the multiple door panels (3) on the multiple ventilation openings (2).
2. The heat-insulating door device according to claim 1, characterized in that: It also includes a horizontal sealing strip (6), which is horizontally disposed on the top of the door panel (3).
3. The heat-insulating door device according to claim 1, characterized in that: It also includes multiple side edges (5), which are symmetrically arranged on both sides of multiple door panels (3).
4. The heat-insulating door device according to claim 3, characterized in that: It also includes a vertical sealing strip (7), which is vertically disposed on the side (5).
5. The heat-insulating door device according to claim 1, characterized in that: The drive structure (4) includes a drive motor (41), which is mounted on the door frame (1); Multiple pulleys (42) are provided on both sides of the door frame (1); A spring, which is disposed on the door frame (1); Pull rope (43), one end of which is connected to the drive motor (41), the other end of which is connected to the spring and is tumblingly connected to multiple pulleys (42), and the pull rope (43) forms multiple equally spaced lateral moving segments in the vent (2); A sling (44) is provided between the transverse moving section and the top of the door panel (3); The drive ring (45) is located inside the vent (2) and is provided with the pull rope (43) and the sling (44) through it.
6. The heat-insulating door device according to claim 5, characterized in that: The drive structure (4) also includes a tensioning assembly located between the sling (44) and the top of the door panel (3).
7. The heat-insulating door device according to claim 6, characterized in that: The tensioning assembly includes a fixing buckle, which is detachably mounted on the top of the door panel (3) and through which the suspension cable (44) passes. Adjusting hollow screw (46), the adjusting hollow screw (46) is screwed into the fixing buckle, and the adjusting hollow screw (46) is provided with the sling (44) through it. The locking nut (47) is screwed into the adjusting hollow screw (46) to fix the sling (44) on the adjusting hollow screw (46).
8. The heat-insulating door device according to claim 7, characterized in that: The fixing buckle includes a fixing ring (48), which is located on the top of the door panel (3) near the drive ring (45); A fixing pin (49) is provided, one end of which passes through the top of the door panel (3) and is snapped together with the fixing ring (48). The fixing pin (49) is coaxially provided with a threaded hole, and the adjusting hollow screw (46) is screwed into the threaded hole.