PLC (Programmable Logic Controller) sealing shell with dustproof and waterproof functions

Abstract

The utility model relates to the technical field of controller protection equipment, and discloses a PLC (Programmable Logic Controller) sealing shell with dustproof and waterproof functions, which comprises a shell body, a sealing cover is arranged on the shell body, the bottom of the sealing cover is fixedly connected with a quick release clamping mechanism, the inner side of the bottom of the shell body is fixedly connected with a waterproof sealing mechanism, and the waterproof sealing mechanism is arranged on the shell body. A sealing groove is formed in the top of the shell, a sealing rubber strip is fixedly connected to the bottom of the sealing cover, the outer side of the sealing rubber strip is slidably connected to the inner side of the sealing groove, and the quick-release clamping mechanism comprises a clamping connecting plate. According to the utility model, the unlocking pull rod drives the control cone block to move so as to push the contact wheel to rotate and drive the clamping sliding rod to stretch out and draw back, when the sealing cover is pressed downwards, the clamping sliding rod extends out and is clamped into the clamping groove of the shell to complete locking, and when the unlocking pull rod is pulled upwards, the clamping sliding rod retracts to complete unlocking, so that the sealing cover and the shell are quickly locked and disassembled; and the overhaul and maintenance time is greatly shortened.

Description

Technical Field

[0001] This utility model relates to the field of controller protection equipment technology, and in particular to a sealed housing for a PLC controller with dustproof and waterproof functions. Background Technology

[0002] A PLC (Programmable Logic Controller) is a digital electronic system used for industrial control. It is widely used in factory automation, building control, transportation, and other applications. In manufacturing, PLC controllers enable precise automated control, improving production efficiency and stability. The housing mainly consists of a shell, cover plate, and sealing rings, which respectively serve to accommodate, enclose, and seal the components.

[0003] When using the PLC controller, first install it into the housing, connect the wiring, and then seal it with the cover plate, ensuring a tight seal to prevent dust and water damage. By setting the program, the PLC controller can automatically control the production process as needed. It is simple to operate, safe, and reliable, effectively ensuring normal equipment operation and production continuity.

[0004] In existing technologies, PLC controller sealing housings are often fixed to the housing with screws. This method is cumbersome, requiring a significant amount of time to unscrew and install the screws during each maintenance, which severely impacts maintenance efficiency. Moreover, simple screw fixing provides limited sealing effectiveness. Improper installation of the sealing strip or aging after long-term use allows dust and moisture to easily penetrate, leading to damage to internal PLC controller components, decreased equipment stability, and shortened service life. Therefore, a PLC controller sealing housing with dustproof and waterproof functions is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a sealed housing for a PLC controller with dustproof and waterproof functions, aiming to improve the problems of complex disassembly of the sealing cover and poor sealing, waterproof and dustproof effects in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dustproof and waterproof sealed housing for a PLC controller includes a housing, a sealing cover provided on the housing, a quick-release locking mechanism fixedly connected to the bottom of the sealing cover, a waterproof sealing mechanism fixedly connected to the inner bottom side of the housing, a sealing groove provided on the top of the housing, and a sealing strip fixedly connected to the bottom of the sealing cover, with the outer side of the sealing strip slidably connected to the inner side of the sealing groove.

[0008] The quick-release locking mechanism includes a locking connecting plate, the outer side of which is slidably connected to the inner side of the groove of the housing, the inner side of which has a groove, the inner side of which is slidably connected to an unlocking lever, the bottom of which is fixedly connected to a control cone, the outer side of which is slidably connected to the inner side of the groove of the locking connecting plate, and the inner side of which is slidably connected to a locking component.

[0009] As a further description of the above technical solution:

[0010] The locking assembly includes a locking slide rod, the outer side of which is slidably connected to the inner side of the locking connecting plate, one end of which is rotatably connected to a contact wheel, the outer side of which contacts the conical surface of the control cone block, and the other end of which is slidably connected to the inner side of the housing.

[0011] As a further description of the above technical solution:

[0012] A locking spring is fitted on the outside of the unlocking lever. One end of the locking spring is fixedly connected to the outside of the unlocking lever, and the other end of the locking spring is fixedly connected to the inside of the sealing cover.

[0013] As a further description of the above technical solution:

[0014] An unlocking spring is sleeved on the outer side of the engaging slide rod. One end of the unlocking spring is fixedly connected to the inner side of the engaging connecting plate, and the other end of the unlocking spring is fixedly connected to the outer side of the engaging slide rod.

[0015] As a further description of the above technical solution:

[0016] A connector is fixedly connected to the outside of the housing, and multiple heat dissipation fins are fixedly connected to the outside of the housing.

[0017] As a further description of the above technical solution:

[0018] The waterproof sealing mechanism includes a fixed cross block. The bottom of the housing has multiple through holes. The outer side of the fixed cross block is fixedly connected to the inner side of the through holes of the housing. A fixed sealing ring is fixedly connected to the inner side of the through holes of the housing. A guide rod is fixedly connected to the outer side of the fixed sealing ring. A limit block is fixedly connected to the end of the guide rod away from the fixed sealing ring. The outer side of the limit block is fixedly connected to the inner side of the through holes of the housing.

[0019] As a further description of the above technical solution:

[0020] A sealing spring is fixedly connected to the outer side of the fixed cross block. A sealing sheet is fixedly connected to the end of the sealing spring away from the fixed cross block. The inner side of the sealing sheet is slidably connected to the outer side of the guide rod. The outer side of the sealing sheet is in contact with the outer side of the fixed sealing ring.

[0021] As a further description of the above technical solution:

[0022] Dustproof porous mesh is fixedly connected to both ends of the through hole of the shell, and a porous water absorption box is fixedly connected to the inner side of the shell.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the unlocking lever drives the control cone to move, the control cone pushes the contact wheel to rotate, and then drives the locking slide rod to extend and retract. When the sealing cover is pressed down, the locking slide rod extends and engages with the housing slot to complete the locking. Pulling up the unlocking lever retracts the locking slide rod to complete the unlocking. This achieves quick locking and disassembly of the sealing cover and the housing. Compared with the traditional screw fixing method, the operation is simpler and more efficient, and the maintenance time is greatly shortened. At the same time, the locking structure, together with the sealing strip, ensures the reliability of the seal, effectively prevents dust and moisture from entering, ensures the stable operation of the PLC controller in harsh environments, and extends the service life of the equipment.

[0025] 2. In this utility model, the internal hot air expands and pushes open the sealing sheet, causing it to overcome the elasticity of the sealing spring and detach from the fixed sealing ring, allowing the hot air to escape. When the temperature drops, the sealing spring drives the sealing sheet to reset and adhere to the fixed sealing ring. This achieves the dual effect of intelligent heat dissipation and sealing. When the PLC controller generates heat during operation, it can automatically open the channel to expel the hot air, preventing the equipment from being damaged by high temperatures. After the temperature drops, it can quickly return to a sealed state. Combined with the dustproof porous mesh, sealing strips, and other structures, it effectively prevents dust and moisture from entering. It can work in cycles without manual intervention, ensuring the heat dissipation requirements of the equipment and improving the overall dustproof and waterproof performance of the outer shell, ensuring the stable operation of the PLC controller. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a sealed housing for a PLC controller with dustproof and waterproof functions proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the heat dissipation fins of a sealed housing for a PLC controller with dustproof and waterproof functions proposed in this utility model.

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4This is a schematic diagram of the wiring terminal of a PLC controller sealed housing with dustproof and waterproof function proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0031] Legend:

[0032] 1. Housing; 2. Sealing cover; 3. Sealing strip; 4. Sealing groove; 5. Engaging connecting plate; 6. Unlocking lever; 7. Locking spring; 8. Control cone; 9. Engaging slide bar; 10. Contact wheel; 11. Unlocking spring; 12. Wiring terminal; 13. Heat dissipation fins; 14. Dustproof perforated mesh; 15. Fixing cross block; 16. Fixing sealing ring; 17. Guide rod; 18. Limiting block; 19. Sealing spring; 20. Sealing film; 21. Perforated water absorption box. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1 to 3 This utility model provides an embodiment of a dustproof and waterproof PLC controller sealed housing, comprising a housing 1 that protects the internal PLC controller and works in conjunction with a sealing strip 3 to achieve a sealing function. A quick-release locking mechanism allows for the rapid removal of a sealing cover 2, facilitating subsequent maintenance and replacement. The housing 1 is provided with a sealing cover 2, which cooperates with the housing 1. The bottom sealing strip 3 and the quick-release locking mechanism achieve reliable sealing and convenient disassembly and assembly, effectively protecting the internal PLC controller. The bottom of the sealing cover 2 is fixedly connected to the quick-release locking mechanism. The structure includes a waterproof sealing mechanism fixedly connected to the bottom inner side of the housing 1, and a sealing groove 4 opened on the top of the housing 1. The sealing groove 4 is a continuous groove surrounding the top edge of the housing 1. When the sealing cover 2 is closed with the housing 1, the sealing strip 3 is tightly attached to the inner wall of the groove, effectively blocking the intrusion of dust and moisture. The bottom of the sealing cover 2 is fixedly connected to the sealing strip 3, which is adapted to the sealing groove 4 and is tightly embedded when the sealing cover 2 is closed with the housing 1, forming a dustproof and waterproof barrier and enhancing the protective performance of the outer shell. The outer side of the sealing strip 3 is slidably connected to the inner side of the sealing groove 4.

[0035] The quick-release locking mechanism includes a locking connecting plate 5, which works with a locking component and a control cone 8 to achieve a secure locking and easy unlocking of the sealing cover 2 and the housing 1. The outer side of the locking connecting plate 5 is slidably connected to the inner side of the slide groove of the housing 1, and the inner side of the locking connecting plate 5 is provided with a slide groove. The inner side of the sealing cover 2 is slidably connected to an unlocking pull rod 6. The locking component is driven by the control cone 8, and with the cooperation of the locking spring 7, the sealing cover 2 and the housing 1 can be quickly locked and unlocked. The operation is simple and reliable. The bottom of the unlocking pull rod 6 is fixedly connected to the control cone 8. Under the drive of the unlocking pull rod 6, the control cone 8 can move up and down in the slide groove, thereby pushing or releasing the locking component and realizing the locking and unlocking functions of the sealing cover 2 and the housing 1. The outer side of the control cone 8 is slidably connected to the inner side of the slide groove of the locking connecting plate 5, and the inner side of the locking connecting plate 5 is slidably connected to the locking component.

[0036] The locking assembly includes a locking slide rod 9, which can extend and retract under the action of the unlocking spring 11, thereby engaging with the slot on the housing 1 to lock the sealing cover 2 and the housing 1. The outer side of the locking slide rod 9 is slidably connected to the inner side of the locking connecting plate 5. One end of the locking slide rod 9 is rotatably connected to a contact wheel 10. When the control cone 8 moves, the contact wheel 10 can roll on the cone surface, converting the movement of the control cone 8 into the extension and retraction of the locking slide rod 9, realizing the transmission of force and the control of the locking assembly. The outer side of the contact wheel 10 contacts the cone surface of the control cone 8, and the other end of the locking slide rod 9 is slidably connected to the inner side of the housing 1.

[0037] A locking spring 7 is fitted on the outer side of the unlocking lever 6. The locking spring 7 can provide appropriate elastic force to the unlocking lever 6 so that the unlocking lever 6 is kept in the locked position when not operated, and can quickly return to its original position after the unlocking lever 6 is operated. One end of the locking spring 7 is fixedly connected to the outer side of the unlocking lever 6, and the other end of the locking spring 7 is fixedly connected to the inner side of the sealing cover 2.

[0038] An unlocking spring 11 is sleeved on the outer side of the locking slide rod 9. The unlocking spring 11 is in a compressed state when locked. When the control cone block 8 releases its support for the locking slide rod 9, it provides elastic force to make the locking slide rod 9 retract inward, thereby unlocking. One end of the unlocking spring 11 is fixedly connected to the inner side of the locking connecting plate 5, and the other end of the unlocking spring 11 is fixedly connected to the outer side of the locking slide rod 9.

[0039] A connector 12 is fixedly connected to the outside of the housing 1. The connector 12 has conductive terminals and a sealing structure inside. After the cable is inserted into the connector 12, it can effectively seal the gap between the cable and the connector 12, achieving dustproof and waterproof function. Multiple heat dissipation fins 13 are fixedly connected to the outside of the housing 1. The heat dissipation fins 13 accelerate heat dissipation by increasing the heat dissipation area. Combined with the waterproof and breathable structure, it ensures the stable operating temperature of the PLC controller while being dustproof and waterproof.

[0040] Reference Figure 1 , Figure 4 and Figure 5 The waterproof sealing mechanism includes a fixed cross block 15, which provides installation support for the sealing spring 19 and the fixed sealing ring 16, ensuring the stable operation of the waterproof sealing mechanism. The bottom of the housing 1 has multiple through holes. The outer side of the fixed cross block 15 is fixedly connected to the inner side of the through holes of the housing 1. The inner side of the through holes of the housing 1 is fixedly connected to the fixed sealing ring 16. The fixed sealing ring 16 cooperates with the sealing film 20 to achieve the sealing function. The outer side of the fixed sealing ring 16 is fixedly connected to a guide rod 17, which can provide precise guidance for the sealing film 20, ensuring that the sealing film 20 will not deviate during movement and reset, and ensuring the sealing effect. The end of the guide rod 17 away from the fixed sealing ring 16 is fixedly connected to a limit block 18. The limit block 18 can limit the movement range of the sealing film 20, preventing the sealing film 20 from moving excessively and being damaged or losing its sealing function. The outer side of the limit block 18 is fixedly connected to the inner side of the through holes of the housing 1.

[0041] A sealing spring 19 is fixedly connected to the outer side of the fixed cross block 15. The sealing spring 19 can provide appropriate elasticity to the sealing film 20, so that the sealing film 20 is tightly attached to the fixed sealing ring 16 under normal conditions to achieve the sealing function. The sealing film 20 is fixedly connected to the end of the sealing spring 19 away from the fixed cross block 15. Under the action of the sealing spring 19, the sealing film 20 can tightly attach to the fixed sealing ring 16, effectively preventing moisture and dust from entering the interior through the through hole at the bottom of the housing 1. When the internal temperature rises, the hot air expands and pushes out, so that the sealing film 20 overcomes the elasticity of the sealing spring 19 and releases the seal, allowing the internal hot air to be discharged. After cooling down, it automatically resets. The inner side of the sealing film 20 is slidably connected to the outer side of the guide rod 17, and the outer side of the sealing film 20 is in contact with the outer side of the fixed sealing ring 16.

[0042] Dustproof porous mesh 14 is fixedly connected to both ends of the through hole of the housing 1. The dustproof porous mesh 14 can effectively block dust particles from entering the interior of the housing 1 and ensure air circulation. A porous water absorption box 21 is fixedly connected to the inside of the housing 1. The inside is equipped with a porous structure to hold silica gel desiccant and realize water absorption function.

[0043] Working principle: First, install the PLC controller inside the housing 1, fix the sealing strip 3 to the bottom of the sealing cover 2, and install the quick-release locking mechanism's locking connecting plate 5, unlocking pull rod 6, control cone 8 and locking assembly inside the sealing cover 2. After installation, press down the sealing cover 2, and the sealing strip 3 is embedded into the sealing groove 4 at the top of the housing 1. At the same time, the locking connecting plate 5 slides along the slide groove of the housing 1, and the control cone 8 pushes the contact wheel 10 to make the locking slide rod 9 extend and lock into the slot of the housing 1. The locking spring 7 and the unlocking spring 11 maintain the locking state, so as to achieve a stable closure between the sealing cover 2 and the housing 1.

[0044] During maintenance, pulling up the unlocking lever 6 moves the control cone 8 upward, causing the contact wheel 10 to rotate. The locking slide 9 retracts under the action of the unlocking spring 11, allowing for quick removal of the sealing cover 2 to inspect or replace the internal PLC controller. During normal operation, the heat generated by the PLC controller is conducted through the housing 1 to the heat dissipation fins 13 for dissipation. At the same time, the hot air inside the housing 1 expands and pushes open the sealing sheet 20, which is then discharged through the bottom through hole. After cooling, the sealing sheet 20 resets under the action of the sealing spring 19. The dustproof porous mesh 14 prevents dust from entering, the sealing strip 3 isolates moisture from the waterproof sealing mechanism, and the porous water absorption box 21 absorbs a small amount of moisture, ensuring stable operation of the equipment in a dustproof and waterproof environment.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealed housing for a PLC controller with dustproof and waterproof functions, comprising a housing (1), characterized in that: The housing (1) is provided with a sealing cover (2), and a quick-release locking mechanism is fixedly connected to the bottom of the sealing cover (2). A waterproof sealing mechanism is fixedly connected to the inner side of the bottom of the housing (1). A sealing groove (4) is opened on the top of the housing (1). A sealing strip (3) is fixedly connected to the bottom of the sealing cover (2). The outer side of the sealing strip (3) is slidably connected to the inner side of the sealing groove (4). The quick-release locking mechanism includes a locking connecting plate (5), the outer side of which is slidably connected to the inner side of the groove of the housing (1), the inner side of which is provided with a groove, the inner side of which is slidably connected to the inner side of the sealing cover (2) with an unlocking pull rod (6), the bottom of which is fixedly connected to a control cone (8), the outer side of which is slidably connected to the inner side of the groove of the locking connecting plate (5), and the inner side of which is slidably connected to a locking component.

2. The sealed housing of a PLC controller with dustproof and waterproof function according to claim 1, characterized in that: The locking assembly includes a locking slide rod (9), the outer side of which is slidably connected to the inner side of the locking connecting plate (5), one end of which is rotatably connected to a contact wheel (10), the outer side of which is in contact with the conical surface of the control cone (8), and the other end of which is slidably connected to the inner side of the housing (1).

3. The sealed housing of a PLC controller with dustproof and waterproof function according to claim 1, characterized in that: A locking spring (7) is sleeved on the outside of the unlocking lever (6). One end of the locking spring (7) is fixedly connected to the outside of the unlocking lever (6), and the other end of the locking spring (7) is fixedly connected to the inside of the sealing cover (2).

4. A sealed housing for a PLC controller with dustproof and waterproof functions according to claim 2, characterized in that: An unlocking spring (11) is sleeved on the outside of the locking slide rod (9). One end of the unlocking spring (11) is fixedly connected to the inside of the locking connecting plate (5), and the other end of the unlocking spring (11) is fixedly connected to the outside of the locking slide rod (9).

5. A sealed housing for a PLC controller with dustproof and waterproof functions according to claim 1, characterized in that: A connector (12) is fixedly connected to the outside of the housing (1), and multiple heat dissipation fins (13) are fixedly connected to the outside of the housing (1).

6. A sealed housing for a PLC controller with dustproof and waterproof functions according to claim 1, characterized in that: The waterproof sealing mechanism includes a fixed cross block (15). The bottom of the housing (1) has multiple through holes. The outer side of the fixed cross block (15) is fixedly connected to the inner side of the through holes of the housing (1). A fixed sealing ring (16) is fixedly connected to the inner side of the through holes of the housing (1). A guide rod (17) is fixedly connected to the outer side of the fixed sealing ring (16). A limit block (18) is fixedly connected to the end of the guide rod (17) away from the fixed sealing ring (16). The outer side of the limit block (18) is fixedly connected to the inner side of the through holes of the housing (1).

7. A sealed housing for a PLC controller with dustproof and waterproof functions according to claim 6, characterized in that: A sealing spring (19) is fixedly connected to the outer side of the fixed cross block (15). A sealing film (20) is fixedly connected to the end of the sealing spring (19) away from the fixed cross block (15). The inner side of the sealing film (20) is slidably connected to the outer side of the guide rod (17). The outer side of the sealing film (20) is in contact with the outer side of the fixed sealing ring (16).

8. A sealed housing for a PLC controller with dustproof and waterproof functions according to claim 1, characterized in that: Dustproof porous mesh (14) is fixedly connected to both ends of the through hole of the housing (1), and a porous water absorption box (21) is fixedly connected to the inner side of the housing (1).

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