Steel door convenient to install
By using multi-layered lightweight materials and an innovative installation structure, the problems of heavy steel doors and complex installation have been solved, enabling rapid installation, cost savings, and improved door durability, sound insulation, and heat preservation performance.
Patent Information
- Application Number
- CN202423002163.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Conventional steel doors are heavy and complex to install, requiring professional personnel and tools, resulting in a long installation process and high costs.
The design incorporates multiple lightweight materials, including high-density fiberboard, thin wood panels, polyurethane foam boards, and glass wool. Combined with an installation structure featuring an expansion sleeve, support columns, and a liquid elastomer, the system allows for rapid installation by rotating a rotating block to push the push rod and support column into the expansion sleeve.
It simplifies the installation process, reduces labor and time costs, improves the door's durability, sound insulation and heat preservation performance, and reduces maintenance and energy consumption.
Smart Images

Figure CN223647684U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of construction, and in particular to a steel door that is easy to install. Background Technology
[0002] A steel door is a type of door made of steel, typically used for entrances or interior doors of buildings. Steel doors are characterized by their sturdiness, durability, fire resistance, burglarproof design, and ease of cleaning, and are widely used in residential, commercial, and industrial buildings.
[0003] However, conventional steel doors are inconvenient to install. Steel doors are typically made of steel and are quite heavy, requiring significant force and tools for installation. Professional installation may be necessary, and the process can be time-consuming due to their weight, requiring precise measurements and adjustments, resulting in a relatively long installation period. Replacing the door requires removing the original and installing a new one, which can cause considerable trouble and expense.
[0004] Therefore, this utility model provides a steel door that is easy to install, in order to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose a steel door that is easy to install. The new model uses multiple layers of lightweight materials inside, which greatly reduces the weight and makes it easy to transport and install. At the same time, the design of this new model is simple, the structure is clear, and the installation process is relatively simple, without the need for complicated operations and tools.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a steel door that is easy to install, comprising a door body, wherein mounting grooves are respectively provided on one side of the upper end and the lower end of the door body, springs are fixedly provided on one side of the two mounting grooves, and support columns are fixedly provided on the other side of the two springs, expansion sleeves are slidably sleeved on the outer ends of the two support columns, push rods are movably provided on the inner ends of the two springs, and a rotating block is rotatably provided on the front end of the door body, wherein two liquid elastomers are wound around the outer end of the rotating block;
[0007] With the above technical solution, during installation, simply place the expansion sleeve into the desired location, then rotate the rotating block. The liquid elastic body will push the push rod to move. After the push rod moves, the support column will also move into the expansion sleeve. Since the support column is conical, it can support the expansion sleeve, and then the steel door can be fixed in the appropriate position. No complicated tools or techniques are required, and the door installation can be completed quickly, saving time and labor costs.
[0008] Furthermore, the first layer of the door body includes two steel plates, with a second layer and a fifth layer respectively disposed between the two steel plates, and a third layer and a fourth layer disposed between the second layer and the fifth layer;
[0009] Through the above technical solutions, the multi-layer lightweight structure design can increase the durability of steel doors, extend their service life, reduce the frequency of maintenance and replacement, and save maintenance costs. At the same time, the overall weight of the materials used is relatively light, making installation and use convenient and reducing the burden.
[0010] Furthermore, the second layer is made of high-density fiberboard, and the third layer is made of thin wood board;
[0011] Through the above technical solutions, the second and third layers are made of high-density fiberboard and thin wood panels, respectively, which can effectively isolate external noise, provide a quieter indoor environment, and enhance living comfort.
[0012] Furthermore, the fourth layer is made of polyurethane foam board, and the fifth layer is made of glass wool;
[0013] Through the above technical solution, the fourth and fifth layers respectively use polyurethane foam board and glass wool, which can effectively isolate heat conduction, improve the thermal insulation performance of steel doors, reduce energy consumption, and lower heating and cooling costs.
[0014] Furthermore, the other ends of the two liquid elastomers are movably disposed at the lower end of the push rod, and the rotating block is rotatably disposed on one side of the two mounting slots opposite each other;
[0015] The above technical solution, which connects the rotating block to the push rod via the liquid elastomer, makes door installation simpler, eliminating the need for complex operations and tools, saving time and labor costs, and allowing for quick completion of door installation.
[0016] Furthermore, two of the springs are disposed at the inner end of the expansion sleeve, and two of the springs are disposed at the lower end of the support column;
[0017] Through the above technical solution, the spring also has a certain supporting effect at the inner end of the expansion sleeve, which improves the safety and reliability of the door after the support column enters the expansion sleeve.
[0018] Furthermore, the other side of the two expansion sleeves is slidably sleeved on the outer end of one side of the door body, and the two support columns are conical blocks;
[0019] Through the above technical solution, the tapered design of the support column can effectively support the expansion sleeve, so that the door remains stable and fixed after installation, and is not easy to loosen or shake, thus improving the safety and stability of the door.
[0020] This utility model has the following beneficial effects:
[0021] 1. The present invention proposes a steel door that is easy to install. The design of the present invention is simple and the structure is clear. The installation process is relatively simple and does not require complicated operations and tools. The installation process is relatively fast and can save time and labor costs, and quickly complete the installation of the door.
[0022] 2. The present invention proposes a steel door that is easy to install. The interior of the present invention uses multiple layers of lightweight materials to greatly reduce the weight, making it easy to transport and install. It can effectively isolate external noise, improve the sound insulation performance of the steel door, and make the indoor environment quieter and more comfortable. At the same time, the multi-layer structure contains heat insulation materials, which can effectively block heat conduction, improve the heat preservation performance of the steel door, and maintain a stable indoor temperature. Attached Figure Description
[0023] Figure 1 This is an isometric view of the present invention;
[0024] Figure 2 This is a cross-sectional view of the present invention;
[0025] Figure 3 This is an isometric view of the rotating block of this utility model;
[0026] Figure 4 This is a cross-sectional view of the support column of this utility model;
[0027] Figure 5 This is a schematic diagram of the internal structure of the door body of this utility model.
[0028] Legend:
[0029] 1. Door body; 2. Spring; 3. Expansion sleeve; 4. Push rod; 5. Support column; 6. Rotating block; 7. Liquid elastomer; 8. Mounting groove; 9. Steel plate; 10. Second layer; 11. Third layer; 12. Fourth layer; 13. Fifth layer. Detailed Implementation
[0030] 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.
[0031] Example
[0032] Reference Figure 1-5This utility model provides an embodiment of a steel door that is easy to install, comprising a door body 1. The upper and lower ends of the door body 1 are respectively provided with mounting grooves 8. Springs 2 are fixedly mounted on one side of each mounting groove 8, and support columns 5 are fixedly mounted on the other side of each spring 2. Expansion sleeves 3 are slidably fitted onto the outer ends of the support columns 5. Push rods 4 are movably mounted on the inner ends of the springs 2. A rotating block 6 is rotatably mounted on the front end of the door body 1. Two liquid elastomers 7 are wound around the outer ends of the rotating block 6. During installation, simply place the expansion sleeves 3 into the desired installation position, then rotate the rotating block 6. The liquid elastomers 7 will push the push rods 4 to move. After the push rods 4 move, the support columns 5 will also move into the expansion sleeves 3. Since the support columns 5 are conical, they can support the expansion sleeves 3, thus fixing the steel door in the appropriate position. No complicated tools or techniques are required, allowing for quick door installation and saving time and labor costs.
[0033] By controlling the movement of the liquid elastomer 7, push rod 4, and support column 5, the position and fixation of the door can be flexibly adjusted, ensuring accurate installation and adapting to different wall structures and door opening sizes. The tapered design of the support column 5 ensures a tighter connection between the support column 5 and the expansion sleeve 3, reducing the risk of loosening and preventing instability after prolonged use.
[0034] The first layer of the door body 1 consists of two steel plates 9. A second layer 10 and a fifth layer 13 are positioned between these two steel plates 9, and a third layer 11 and a fourth layer 12 are positioned between the second and fifth layers 10 and 13. This multi-layered, lightweight structure design increases the durability of the steel door, extends its service life, reduces the frequency of maintenance and replacement, and saves on maintenance costs. The overall weight of the materials used is relatively light, facilitating installation and use and reducing the burden on the user. The second layer 10 is made of high-density fiberboard, and the third layer 11 is made of thin wood panels. The use of high-density fiberboard and thin wood panels in the second and third layers effectively insulates against external noise, providing a quieter indoor environment and enhancing living comfort. The fourth layer 12 is made of polyurethane foam board, and the fifth layer 13 is made of glass wool. The use of polyurethane foam board and glass wool in the fourth and fifth layers effectively insulates against heat conduction, improves the thermal insulation performance of the steel door, reduces energy consumption, and lowers heating and cooling costs. Two liquid elastomers 7 are movably mounted at the lower end of the push rod 4. A rotating block 6 is rotatably mounted on one side of the two mounting slots 8. Rotating the rotating block 6 allows the liquid elastomers 7 to push the push rod 4, making door installation simpler and eliminating the need for complex operations and tools, saving time and labor costs, and enabling quick door installation. Two springs 2 are located inside the expansion sleeve 3 and at the lower end of the support column 5. The springs 2 also provide some support inside the expansion sleeve 3, improving the door's safety and reliability after the support column 5 enters the expansion sleeve 3. The other side of the two expansion sleeves 3 is slidably fitted onto the outer end of one side of the door body 1. The two support columns 5 are conical blocks. The conical design of the support columns 5 effectively supports the expansion sleeves 3, ensuring the door remains stable and fixed after installation, preventing loosening or shaking, and improving the door's safety and stability.
[0035] This new multi-layered structure is made entirely of environmentally friendly materials, meeting environmental standards and releasing no harmful gases during use, thus benefiting indoor air quality and resident health. These materials also possess high strength, increasing the overall door's compressive and tensile strength, enhancing its stability and durability. The expansion sleeve 3 is made of plastic or metal. Through the conical design of the support column 5, pushing in the expansion sleeve 3 lifts one end, thus securing it tightly against the mounting hole.
[0036] Working principle: During installation, simply place the expansion sleeve 3 into the desired installation position, then rotate the rotating block 6. The liquid elastomer 7 will push the push rod 4 to move. After the push rod 4 moves, the support column 5 will also move into the expansion sleeve 3. Since the support column 5 is conical, it can support the expansion sleeve 3, and then the steel door can be fixed in the appropriate position.
[0037] 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 steel door that is easy to install, comprising a door body (1), characterized in that: The door body (1) has mounting grooves (8) on one side of the upper end and the lower end respectively. A spring (2) is fixedly installed on one side of the two mounting grooves (8), and a support column (5) is fixedly installed on the other side of the two springs (2). An expansion sleeve (3) is slidably sleeved on the outer end of the two support columns (5), and a push rod (4) is movably installed on the inner end of the two springs (2). The front end of the door body (1) is rotatably provided with a rotating block (6), and two liquid elastomers (7) are wound around the outer end of the rotating block (6).
2. The steel door that is easy to install according to claim 1, characterized in that: The first layer of the door body (1) includes two steel plates (9), and a second layer (10) and a fifth layer (13) are respectively arranged between the two steel plates (9). A third layer (11) and a fourth layer (12) are arranged between the second layer (10) and the fifth layer (13).
3. A steel door that is easy to install according to claim 2, characterized in that: The second layer (10) is made of high-density fiberboard, and the third layer (11) is made of veneer wood.
4. A steel door that is easy to install according to claim 2, characterized in that: The fourth layer (12) is made of polyurethane foam board, and the fifth layer (13) is made of glass wool.
5. A steel door that is easy to install according to claim 1, characterized in that: The other ends of the two liquid elastomers (7) are movably disposed at the lower end of the push rod (4), and the rotating block (6) is rotatably disposed on the opposite side of the two mounting slots (8).
6. A steel door that is easy to install according to claim 1, characterized in that: Two springs (2) are disposed at the inner end of the expansion sleeve (3) and at the lower end of the support column (5).
7. A steel door that is easy to install according to claim 1, characterized in that: The two expansion sleeves (3) are slidably sleeved on the outer end of one side of the door body (1), and the two support columns (5) are conical blocks.