A thermal blanket limiting device

Abstract

The utility model relates to a thermal -insulated quilt roll -out equipment technical field, concretely is a kind of thermal -insulated quilt limiting device, including base rod and the connecting rod connected with the base rod, two support tubes are fixedly arranged on base rod, rotatably connected with movable arm between two support tubes, the connecting rod on the side away from the support tube is fixed with adjusting assembly, and the adjusting assembly upper end is equipped with switch assembly. The utility model adopts the non-contact switch assembly of hall sensor and magnetic piece, replaces traditional mechanical contact structure, avoids the abrasion problem caused by mechanical friction, prolongs service life;Non-contact detection is not interfered with by greenhouse outside water vapor, dust simultaneously, greatly reduces malfunction or malfunction probability, ensures that roll-up curtain system stable trigger stop, reduces equipment damage, thermal -insulated quilt drop risk.

Description

Technical Field

[0001] This utility model relates to the technical field of thermal insulation blanket rolling and unrolling equipment, specifically a thermal insulation blanket limiting device. Background Technology

[0002] In modern agriculture, greenhouse insulation blankets are crucial for maintaining the temperature inside the greenhouse at night and during periods of low temperatures. Their operation relies on a rolling shutter mechanism for automated control. Limit switches, as the core control element of the rolling shutter system, must accurately detect the extreme position of the insulation blanket's winding and trigger the motor to stop, preventing equipment damage or blanket detachment due to over-winding or unwinding.

[0003] Currently, the mainstream limit switches are mainly mechanical contact type, which has obvious technical shortcomings: First, they are prone to wear, have low precision, and short service life, making it difficult to work stably for a long time; second, in the complex environment of dense water vapor and dust outside the greenhouse, they are easily interfered with, causing malfunctions or failures, which seriously affects the reliability of the system.

[0004] In summary, existing mechanical contact limit switches can no longer meet the requirements for stable operation and compatibility of greenhouse curtain systems. There is an urgent need to develop a thermal insulation blanket limit device to solve the pain points of the existing technology. Utility Model Content

[0005] To address the existing problems, this utility model provides a thermal insulation blanket limiting device to solve the problems mentioned in the background art.

[0006] To address the existing problems, this utility model provides a thermal insulation blanket limiting device, including a base rod and a connecting rod connected to the base rod. Two support tubes are fixedly mounted on the base rod, and a movable arm is rotatably connected between the two support tubes. An adjustment component is fixedly mounted on the connecting rod on the side away from the support tubes. A switch component is provided at the upper end of the adjustment component, and a safety component is provided on the lower surface of the rear end of the movable arm. The adjustment component includes a fixed tube, the lower end of which is fixedly connected to the upper surface of the connecting rod. A movable rod is slidably inserted into the upper end of the fixed tube. The outer wall is threaded with a fastening bolt for securing the movable rod, and the upper end of the movable rod abuts against the lower surface of one end of the movable arm; the switch assembly includes a Hall sensor located on the upper side of the movable rod, and a magnetic element is provided on the lower surface of the movable arm corresponding to the Hall sensor; the safety assembly includes two fixing ears fixed to the lower surface of the rear end of the movable arm, and a protective shell is provided between the two fixing ears; the fixing ears are connected to the side wall of the protective shell by a fastening screw; a mercury switch is provided inside the protective shell to trigger mercury flow to output a stop signal when the movable arm is tilted.

[0007] Furthermore, the magnetic component includes a mounting plate, a sheet magnet is fixedly connected to the lower surface of the mounting plate, and lead screws are rotatably connected to both ends of the mounting plate, with the lead screws threadedly connected to the lower surface of the movable arm.

[0008] Furthermore, a row of insertion holes is provided on the fixed tube, and a pin is inserted into the insertion hole, the pin being rotatably connected to the movable arm.

[0009] Furthermore, a reinforcing rib is fixedly provided on the outer periphery of the connection between the support tube and the base rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This utility model adopts a non-contact switch assembly composed of Hall sensors and magnetic components to replace the traditional mechanical contact structure, avoiding wear problems caused by mechanical friction and extending service life; at the same time, non-contact detection is not affected by water vapor and dust outside the greenhouse, greatly reducing the probability of malfunction or failure, ensuring stable triggering and shutdown of the roller shutter system, and reducing the risk of equipment damage and insulation detachment.

[0012] 2. By setting up a safety component, when the Hall sensor fails to trigger the stop normally, the tilt of the movable arm will also cause the safety component to tilt. The switching of the mercury switch will output a signal to the background control device, ensuring that the insulation blanket winding mechanism stops in time. This avoids the insulation blanket being over-wound or unwound due to the failure of the switch component, prevents equipment damage, and greatly improves the system's safety redundancy.

[0013] 3. The mercury switch of this utility model's safety component is not affected by low temperatures or rain and snow, making it highly adaptable to various environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the switch assembly structure of this utility model;

[0017] Figure 4 This utility model Figure 2 A magnified structural diagram at point A;

[0018] Figure 5 This utility model Figure 2 A magnified structural diagram at point B;

[0019] Figure 6This is a cross-sectional view of the protective shell of the safety component of this utility model;

[0020] In the diagram: 1. Base rod; 2. Connecting rod; 3. Movable arm; 4. Adjustment assembly; 401. Fixing tube; 402. Movable rod; 403. Fastening bolt; 5. Switch assembly, pin; 501. Hall sensor; 502. Magnetic component; 5021. Mounting plate; 5022. Sheet magnet; 5023. Lead screw; 4011. Socket hole; 6. Safety assembly; 601. Fixing ear; 602. Protective shell; 603. Fastening screw; 604. Mercury switch; 7. Reinforcing rib; 8. Support tube; 9. Pin. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-6 A thermal insulation blanket limiting device includes a base rod 1 and a connecting rod 2 connected to the base rod 1. Two support tubes 8 are fixedly installed on the base rod 1, and a movable arm 3 is rotatably connected between the two support tubes 8. An adjusting component 4 is fixedly installed on the connecting rod 2 on the side away from the support tubes 8. A switch component 5 is provided at the upper end of the adjusting component 4, and a safety component 6 is provided on the lower surface of the rear end of the movable arm 3. The adjusting component 4 includes a fixed tube 401, the lower end of which is fixedly connected to the upper surface of the connecting rod 2. A movable rod 402 is slidably inserted into the upper end of the fixed tube 401, and a threaded connection is made to the outer wall of the upper end of the fixed tube 401 for fastening the movable rod 402. The fastening bolt 403 is used to abut the upper end of the movable rod 402 against the lower surface of one end of the movable arm 3. The switch assembly 5 includes a Hall sensor 501 located on the upper side of the movable rod 402. A magnetic element 502 is provided on the lower surface of the movable arm 3 above the Hall sensor 501. The safety assembly 6 includes two fixing ears 601 fixed to the lower surface of the rear end of the movable arm 3. A protective shell 602 is provided between the two fixing ears 601. The fixing ears 601 are connected to the side wall of the protective shell 602 by a fastening screw 603. A mercury switch 604 is provided inside the protective shell 602 to trigger mercury flow to output a stop signal when the movable arm 3 is tilted.

[0023] It should be noted that: Firstly, the protective shell 602 is made of acrylic material, allowing direct observation of the internal mercury switch 604; its side wall has an internal threaded hole that matches the external thread of the fastening screw 603. Secondly, when adjusting the mercury switch, first loosen the fastening screw 603 to release the protective shell 602 from the fixing ear 601; rotate the protective shell 602 until the internal mercury switch is horizontal, then retighten the fastening screw 603 to ensure a secure connection between the protective shell 602 and the fixing ear 601.

[0024] It should also be noted that: Reference Figure 1 and Figure 2 The pin 9 is installed away from the center of gravity of the movable arm 3, specifically: away from the end of the movable arm 3 where the safety component 6 is located, and closer to the opposite end where the safety component 6 is located. This design allows the rear half of the movable arm 3 to obtain a larger gravitational torque, thereby ensuring that it can automatically and reliably return to its original position by gravity.

[0025] The magnetic component 502 includes a mounting plate 5021, a sheet magnet 5022 fixedly connected to the lower surface of the mounting plate 5021, and lead screws 5023 rotatably connected to both ends of the mounting plate 5021. The lead screws 5023 are threadedly connected to the lower surface of the movable arm 3.

[0026] It should be noted that the sheet magnet 5022 can be fixedly connected to the lower surface of the mounting plate 5021 by means of bonding or other methods; the lower surface of the movable arm 3 is provided with a threaded hole that matches the external thread of the lead screw 5023.

[0027] The fixed tube 401 has a row of insertion holes 4011, and a pin 9 is inserted into the insertion hole 4011. The pin 9 is rotatably connected to the movable arm 3.

[0028] It should be noted that small through holes are provided at both ends of the pin 9, and cotter pins can be inserted into these holes to prevent the pin 9 from falling out. The cotter pin and its installation method are existing technologies, and their structure and principle will not be described in detail here.

[0029] Among them, a reinforcing rib plate 7 is fixedly provided on the outer periphery of the connection between the support tube 2 and the base rod 1.

[0030] Working principle: Before operation, first remove the pin 9, then adjust the movable arm 3 to a suitable height relative to the support tube 2. At this time, insert the pin 9 again into the insertion hole 4011 of the support tube 401 and the insertion hole on the movable arm 3. Then, loosen the fastening bolt 403 and move the movable rod 402 within the fixed tube 401 until the movable arm 3 above the movable rod 402 is in a horizontal state. Then tighten the fastening bolt 403 to prevent the movable rod 402 from sliding within the fixed tube 401. At this time, the upper end of the movable rod 403 is also in contact with the lower surface of the movable arm 3. Finally, the entire device is fixed by the base rod 1.

[0031] During operation, when the insulation blanket reaches the limit position, it will touch the end of the movable arm 3 away from the safety component 6. At this time, the movable arm 3 will rotate around the pin 5 as the center, and the magnetic component 502 will move upward along the pin 9 as the movable arm 3 rotates. The sheet magnet 5022 will leave the sensing range of the Hall sensor 501. The Hall sensor 501 detects the change in magnetic field and outputs an electrical signal, which is transmitted to the background control device to trigger the insulation blanket winding mechanism to stop. If the insulation blanket retracts in the opposite direction, the movable arm 3 will rotate around the pin 9 to reset under its own gravity, and the magnetic component 502 will enter the sensing range of the Hall sensor 501. The Hall sensor 501 detects the change in magnetic field and outputs a signal to the background control device again, and the background control device will release the stop command. If the Hall sensor 501 fails to trigger the limit switch, but the safety component 6 on the lower rear surface of the movable arm 3 tilts synchronously due to the tilt of the movable arm 3, the mercury in the mercury switch 604 inside the protective shell 602 flows due to gravity, triggering the switch to change its on / off state and outputting a corresponding signal to the background control device. The mercury switch 604 of the safety component 6 plays a second limit protection role, preventing the insulation from being over-wound or released due to the failure of the switch component 5, thus preventing equipment damage.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A thermal insulation blanket limiting device, comprising a base rod (1) and a connecting rod (2) connected to the base rod (1), characterized in that: Two support tubes (8) are fixedly installed on the base rod (1). A movable arm (3) is rotatably connected between the two support tubes (8). An adjustment component (4) is fixedly installed on the connecting rod (2) on the side away from the support tubes (8). A switch component (5) is provided at the upper end of the adjustment component (4). A safety component (6) is provided on the lower surface of the rear end of the movable arm (3). The adjustment assembly (4) includes a fixed tube (401), the lower end of which is fixedly connected to the upper surface of the connecting rod (2), a movable rod (402) is slidably inserted into the upper end of the fixed tube (401), and a fastening bolt (403) for fastening the movable rod (402) is threadedly connected to the outer wall of the upper end of the fixed tube (401), and the upper end of the movable rod (402) abuts against the lower surface of one end of the movable arm (3); The switch assembly (5) includes a Hall sensor (501) disposed on the upper side of the movable rod (402), and a magnetic element (502) is provided on the lower surface of the movable arm (3) above the Hall sensor (501). The safety component (6) includes two fixing ears (601) fixed to the lower surface of the rear end of the movable arm (3). A protective shell (602) is provided between the two fixing ears (601). The fixing ears (601) are connected to the side wall of the protective shell (602) by fastening screws (603). A mercury switch (604) is provided inside the protective shell (602) to trigger mercury flow to output a stop signal when the movable arm (3) is tilted.

2. The thermal insulation blanket limiting device according to claim 1, characterized in that: The magnetic component (502) includes a mounting plate (5021), a sheet magnet (5022) is fixedly connected to the lower surface of the mounting plate (5021), and a lead screw (5023) is rotatably connected to both ends of the mounting plate (5021). The lead screw (5023) is threadedly connected to the lower surface of the movable arm (3).

3. The thermal insulation blanket limiting device according to claim 1, characterized in that: A row of insertion holes (4011) is provided on the fixed tube (401), and a pin (9) is inserted into the insertion hole (4011). The pin (9) is rotatably connected to the movable arm (3).

4. The thermal insulation blanket limiting device according to claim 1, characterized in that: A reinforcing rib (7) is fixedly provided on the outer periphery of the connection between the support tube (8) and the base rod (1).

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