Plastic metal access port
By introducing a fixed component and a rotating rod structure into the access port, the problems of accidental opening of the access port and insufficient tools are solved, and automatic locking and convenient tool carrying are realized, thereby improving the reliability and efficiency of equipment maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SHUNSHI INTELLIGENT & TECH CO LTD
- Filing Date
- 2025-09-01
- Publication Date
- 2026-07-24
AI Technical Summary
Existing access ports are prone to accidental opening due to forgetting to lock them, allowing cold air to enter the equipment, affecting its lifespan, and the lack of specific tools during maintenance leads to delays in response time.
A plastic-metal access panel was designed, employing a fixed component and rotating rod structure, combined with a spring and threaded block, to ensure that the cover automatically locks and that maintenance tools can be easily carried through the storage component.
It effectively prevents the inspection port from opening accidentally, extends the service life of machinery, improves maintenance efficiency, and reduces downtime caused by insufficient tools.
Smart Images

Figure CN224549965U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inspection port technology, and in particular to a plastic-metal inspection port. Background Technology
[0002] Inspection ports are access panels used during renovations to access various parts of the equipment, such as central air conditioning ducts, electrical conduits, and bathroom water supply and drainage pipes. The emergence of prefabricated inspection ports has filled a gap in the domestic market, and they are widely used in government departments, airports, star-rated hotels, guesthouses, office buildings, residential buildings, villas, shops, and other office and home environments. These products are easy to transport, easy to install, durable, fireproof, and environmentally friendly, making them popular with users. Currently, most inspection ports are made of plastic and metal, and are typically closed to protect internal parts from damage. However, the widely used manual locking mechanism presents significant safety hazards. After maintenance, if staff neglect to lock the port, it can easily open due to equipment vibration or accidental collisions. This allows cold, humid air to continuously penetrate the equipment, causing key components to become damp and rusted, accelerating equipment aging, and severely shortening its lifespan. Furthermore, many specialized machines require specific tools for maintenance, and the lack of these tools can significantly delay response times, directly impacting equipment operating efficiency and production continuity. Utility Model Content
[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a plastic-metal inspection port.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a plastic-metal inspection port, wherein rotating rods are fixedly connected to both sides of the device frame, and a cover plate that cooperates with the device frame is rotatably connected to the end of the rotating rod away from the device frame. A handle is fixedly connected to the top of the cover plate. A fixing assembly is provided between the device frame and the cover plate. The fixing assembly includes a spring groove on the side of the device frame away from the rotating rod, a spring fixedly connected inside the spring groove, and a threaded block fixedly connected to the end of the spring away from the rotating rod. First sliding grooves are provided on both sides of the inner cavity of the spring groove, and first sliders are slidably connected inside the first sliding grooves. The two first sliders are fixedly connected to the threaded block on the side near the threaded block.
[0005] As a preferred technical solution of this utility model, a threaded barrel that cooperates with a threaded block is rotatably connected to the side of the cover plate away from the spring groove. The end of the threaded barrel near the threaded block passes through the cover plate and extends into the interior of the cover plate. A rotating block is fixedly connected to the end of the threaded barrel away from the threaded block.
[0006] As a preferred technical solution of this utility model, a storage component is provided at the bottom of the cover plate. The storage component includes a storage frame disposed at the bottom of the cover plate. A second sliding groove is provided on both sides of the inner cavity of the storage frame, and a second slider is slidably connected inside the second sliding groove.
[0007] As a preferred embodiment of the present invention, a pull frame is fixedly connected between the two second sliders, a sliding groove is provided at the bottom of the storage frame, a pull block is rotatably connected to the bottom of the pull frame, and the end of the pull block away from the pull frame passes through the sliding groove and extends to the outside of the storage frame.
[0008] As a preferred embodiment of this utility model, the bottom of the storage frame is fixedly connected with a number of limiting blocks that cooperate with the pulling block.
[0009] Compared with the prior art, the beneficial effects that this utility model can achieve are: This invention, by setting a fixed component, a rotating rod, and a handle, allows the threaded block to be inserted into the threaded barrel by spring compression when the cover is closed. At the same time, rotating the rotating block limits and fixes the cover, preventing maintenance personnel from forgetting to lock the access port, which could lead to accidental opening due to external contact or mechanical vibration, allowing cold air to enter the equipment and causing mechanical parts to become damp and rust, resulting in mechanical damage. This improves the service life of the machinery and reduces the frequency of mechanical maintenance.
[0010] This invention, by setting up a storage component, allows workers to pull a pulling block to extend a pulling frame from the storage box when repairing the machinery inside the inspection port. As the pulling frame is extended, the pulling block is rotated to engage with a limiting block, thus securing the pulling frame. Workers can then retrieve tools from the pulling frame to repair the machinery inside the inspection port. This avoids downtime caused by workers forgetting to bring specific tools, thereby improving production efficiency. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of the device frame of this utility model covered by a cover plate; Figure 2 This is a schematic diagram of the structure of the device frame of this utility model; Figure 3 This is a schematic diagram of the structure of the second slide groove of this utility model; Figure 4 This is a schematic diagram of the sliding groove of this utility model; Figure 5 This is a schematic diagram of the structure of the spring of this utility model.
[0012] Wherein: 1. Device frame; 12. Rotating rod; 13. Cover plate; 14. Handle; Fixed component; 21. Spring groove; 22. Spring; 23. Threaded block; 24. First slide groove; 25. First slider; 26. Threaded barrel; 27. Rotating block; Storage components; 31. Storage frame; 32. Second slide rail; 33. Second slider; 34. Pull frame; 35. Slide rail; 36. Pull block; 37. Limit block. Detailed Implementation
[0013] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.
[0014] Example: This utility model provides, for example... Figure 1 , Figure 2 and Figure 5 The diagram shows a plastic-metal access panel, comprising a frame 1. Rotating rods 12 are fixedly connected to both sides of the frame 1. A cover plate 13, which mates with the frame 1, is rotatably connected to the end of each rotating rod 12 away from the frame 1. A handle 14 is fixedly connected to the top of the cover plate 13. A fixing assembly 2 is provided between the frame 1 and the cover plate 13. The fixing assembly 2 includes a spring groove 21 on the side of the frame 1 away from the rotating rods 12. A spring 22 is fixedly connected inside the spring groove 21. The end of the spring 22 away from the rotating rods 12 is fixedly connected to the spring groove 21. A threaded block 23 is fixedly connected to the cover plate 13. A first sliding groove 24 is provided on both sides of the inner cavity of the spring groove 21. A first slider 25 is slidably connected inside the first sliding groove 24. The two first sliders 25 are fixedly connected to the threaded block 23 on the side near the threaded block 23. A threaded barrel 26 that cooperates with the threaded block 23 is rotatably connected to the side of the cover plate 13 away from the spring groove 21. The end of the threaded barrel 26 near the threaded block 23 passes through the cover plate 13 and extends into the interior of the cover plate 13. A rotating block 27 is fixedly connected to the end of the threaded barrel 26 away from the threaded block 23.
[0015] refer to Figure 1 , Figure 2 and Figure 5As shown, the worker separates the threaded block 23 from the threaded barrel 26 by rotating the rotating block 27. Then, the worker pulls the handle 14 to rotate the rotating rod 12. The rotation of the rotating rod 12 causes the cover plate 13 to rotate and remove its cover from the device frame 1. At the same time as the cover plate 13 rotates, the threaded block 23 squeezes the spring 22 through the cooperation of the first sliding groove 24 and the first slider 25, causing the threaded block 23 to be squeezed out from inside the threaded barrel 26 and retract into the spring groove 21, so that the cover plate 13 can no longer limit the device frame 1. After the maintenance is completed, the worker pulls the pulling block 36, causing the pulling block 36 to move inside the sliding groove 35. The pulling block 36 pulls the pulling frame 34 through the cooperation of the second sliding groove 32 and the second slider 33, causing the pulling frame 34 to pull the maintenance tools out from inside the storage frame 31. The worker uses the maintenance tools inside the storage frame 31 to repair the machinery inside the inspection port.
[0016] refer to Figure 1 , Figure 3 ,and Figure 4 As shown, a storage component 3 is provided at the bottom of the cover plate 13. The storage component 3 includes a storage frame 31 disposed at the bottom of the cover plate 13. A second sliding groove 32 is provided on both sides of the inner cavity of the storage frame 31. A second slider 33 is slidably connected inside the second sliding groove 32. A pull frame 34 is fixedly connected between the two second sliders 33. A sliding groove 35 is provided at the bottom of the storage frame 31. A pull block 36 is rotatably connected to the bottom of the pull frame 34. The end of the pull block 36 away from the pull frame 34 passes through the sliding groove 35 and extends to the outside of the storage frame 31. A plurality of limiting blocks 37 that cooperate with the pull block 36 are fixedly connected to the bottom of the storage frame 31.
[0017] refer to Figure 1 , Figure 3 ,and Figure 4 As shown, the worker pulls the pull block 36, causing it to move inside the sliding groove 35. The pull block 36, through the cooperation of the second sliding groove 32 and the second slider 33, pulls the pull frame 34, causing the pull frame 34 to pull the maintenance tools out from the storage box 31. Then, the worker rotates the pull block 36 to enter the limit block 37, which limits the pull block 36. The worker then uses the maintenance tools inside the storage box 31 to repair the machinery inside the inspection port.
[0018] Working principle: Before use: refer to Figure 1 , Figure 2 and Figure 5As shown, the worker separates the threaded block 23 from the threaded barrel 26 by rotating the rotating block 27. Then, the worker pulls the handle 14 to rotate the rotating rod 12. The rotation of the rotating rod 12 causes the cover plate 13 to rotate and remove its cover from the device frame 1. At the same time as the cover plate 13 rotates, the threaded block 23 squeezes the spring 22 through the cooperation of the first sliding groove 24 and the first sliding block 25, causing the threaded block 23 to be squeezed out from the inside of the threaded barrel 26 and contracted into the spring groove 21, so that the cover plate 13 removes its restriction on the device frame 1.
[0019] When using: refer to Figure 3 and Figure 4 As shown, the worker pulls the pull block 36, causing it to move inside the sliding groove 35. The pull block 36, through the cooperation of the second sliding groove 32 and the second slider 33, pulls the pull frame 34, causing the pull frame 34 to pull the maintenance tools out from the storage box 31. Then, the worker rotates the pull block 36 to enter the limit block 37, which limits the pull block 36. The worker then uses the maintenance tools inside the storage box 31 to repair the machinery inside the inspection port.
[0020] After use: refer to Figure 1 , Figure 2 ,and Figure 5 As shown, when the worker pushes the handle 14, the rotating rod 12 rotates and drives the cover plate 13 to close the device frame 1. At the same time, the spring 22 pushes the threaded block 23, so that the threaded block 23 is pushed into the threaded barrel 26 through the cooperation of the first sliding groove 24 and the first slider 25. Then, the rotating block 27 is rotated, and the rotating block 27 drives the threaded barrel 26 to rotate. The rotation of the threaded barrel 26 rotates the threaded block 23 into the threaded barrel 26, thus fixing the cover plate 13.
[0021] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.
Claims
1. A plastic-metal inspection port, comprising a device frame (1), characterized in that, Rotating rods (12) are fixedly connected to both sides of the device frame (1). A cover plate (13) that cooperates with the device frame (1) is rotatably connected to the end of the rotating rod (1) away from the device frame (1). A handle (14) is fixedly connected to the top of the cover plate (13). A fixing component (2) is provided between the device frame (1) and the cover plate (13). The fixing component (2) includes a spring groove (21) provided on the side of the device frame (1) away from the rotating rod (12). A spring (22) is fixedly connected inside the spring groove (21). A threaded block (23) is fixedly connected to the end of the spring (22) away from the rotating rod (12). A first sliding groove (24) is provided on both sides of the inner cavity of the spring groove (21). A first slider (25) is slidably connected inside the first sliding groove (24). The two first sliders (25) are fixedly connected to the threaded block (23) on the side near the threaded block (23).
2. The plastic-metal inspection port according to claim 1, characterized in that, The cover plate (13) is rotatably connected to a threaded barrel (26) that cooperates with the threaded block (23) on the side away from the spring groove (21). The end of the threaded barrel (26) near the threaded block (23) passes through the cover plate (13) and extends into the interior of the cover plate (13). The end of the threaded barrel (26) away from the threaded block (23) is fixedly connected to a rotating block (27).
3. The plastic-metal inspection port according to claim 1, characterized in that, The bottom of the cover plate (13) is provided with a storage component (3), which includes a storage frame (31) provided at the bottom of the cover plate (13). The storage frame (31) has a second sliding groove (32) on both sides of its inner cavity, and a second slider (33) is slidably connected inside the second sliding groove (32).
4. A plastic-metal inspection port according to claim 3, characterized in that, A pull frame (34) is fixedly connected between the two second sliders (33), and a sliding groove (35) is provided at the bottom of the storage frame (31).
5. A plastic-metal inspection port according to claim 4, characterized in that, The bottom of the pull frame (34) is rotatably connected to a pull block (36), and the end of the pull block (36) away from the pull frame (34) passes through the sliding groove (35) and extends to the outside of the storage frame (31).
6. A plastic-metal inspection port according to claim 3, characterized in that, The bottom of the storage frame (31) is fixedly connected with several limiting blocks (37) that cooperate with the pull block (36).