High-strength stamping-resistant fire hydrant casting
By applying a high-chromium cast iron alloy coating and a copper alloy coating to the surface of the fire hydrant casting and using a gear transmission system to protect the outlet pipe, the deformation problem of the fire hydrant casting during collision is solved, achieving high strength and impact resistance, and ensuring water supply stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUANZHOU CAISHENG FOUNDRY CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional fire hydrant castings are insufficient in strength and impact resistance, and are easily deformed by vehicle collisions in busy traffic areas, resulting in failure to supply water normally and delaying the opportunity to extinguish fires.
The strength and wear resistance of the fire hydrant castings are enhanced by using high-chromium cast iron alloy coating and copper alloy coating, and the protective cover for the outlet pipe is realized through a gear transmission system to enhance the structural stability.
It improves the strength and impact resistance of fire hydrant castings, prevents deformation, ensures normal water supply even in the event of an impact, and extends service life.
Smart Images

Figure CN224292408U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire hydrant casting technology, specifically a high-strength, impact-resistant fire hydrant casting. Background Technology
[0002] As a key component of fire protection systems, fire hydrants play a crucial role in supplying water during fire fighting, and their reliability directly affects the effectiveness of firefighting efforts and the safety of life and property. In practical applications, fire hydrants face numerous severe challenges.
[0003] Traditional fire hydrant castings are insufficient in terms of strength and impact resistance. In some busy traffic areas, passing vehicles may accidentally collide with fire hydrants. Ordinary castings cannot withstand such large impact forces, which can easily cause deformation at the water inlet, preventing the fire hydrant from supplying water normally and delaying the golden opportunity for fire extinguishing. To address this, we propose a high-strength, impact-resistant fire hydrant casting. Utility Model Content
[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a high-strength, impact-resistant fire hydrant casting. This casting possesses the advantages of high strength and impact resistance, solving the problem that traditional fire hydrant castings are insufficient in terms of strength and impact resistance. In some busy traffic areas, passing vehicles may accidentally collide with fire hydrants. Ordinary castings cannot withstand such large impact forces, which can easily cause deformation at the water inlet, resulting in the fire hydrant being unable to supply water normally and delaying the golden opportunity for fire extinguishing.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-strength, impact-resistant fire hydrant casting, comprising a fire hydrant casting body, with water outlet pipes connected to the top of both sides of the fire hydrant casting body, a cover plate threaded to one side of the water outlet pipe, and a housing fixedly connected to the central axis of both sides of the fire hydrant casting body, a gear being provided in the inner cavity of the housing, a rotating shaft fixedly connected to one side of the gear, a connecting rod fixedly connected to one side of the rotating shaft, a protective cover fixedly connected to one side of the connecting rod, a fixing plate fixedly connected to the top of the housing, a spring fixedly connected to one side of the fixing plate, a fixing disc fixedly connected to one side of the spring, a prism fixedly connected to one side of the fixing disc, an adjusting plate fixedly connected to one side of the prism, and a pin fixedly connected to one side of the adjusting plate.
[0006] Preferably, the surfaces of the fire hydrant casting body, outlet pipe, and cover plate are provided with functional layers, which include a high-chromium cast iron alloy plating and a copper alloy plating.
[0007] Preferably, the number of gears is two, and the two gears mesh with each other.
[0008] Preferably, the surface of the rotating shaft is movably connected to the housing via a bearing, and a circular hole is provided on the outer side of the housing.
[0009] Preferably, a socket is provided on one side of the connecting rod, and the socket is adapted to the pin.
[0010] Preferably, a rectangular groove is provided on one side of the fixing plate, and the inner cavity of the rectangular groove is slidably connected to the prism.
[0011] Preferably, the high-chromium cast iron alloy coating is plated on the surface of the fire hydrant casting body, the outlet pipe and the cover plate, respectively, and the copper alloy coating is plated on the outside of the high-chromium cast iron alloy coating.
[0012] Compared with the prior art, this utility model provides a high-strength, impact-resistant fire hydrant casting, which has the following advantages:
[0013] 1. When protection is required after using this utility model, push the fixing plate inward. The fixing plate drives the prism to move, the prism drives the adjusting plate to move, and the adjusting plate drives the pin to move. Then rotate the connecting rod on one side. The connecting rod drives the corresponding rotating shaft to rotate, the rotating shaft drives the corresponding gear to rotate, and then drives another gear to rotate. The other gear drives the corresponding rotating shaft to rotate, and the rotating shaft drives the corresponding connecting rod to rotate, thereby causing the protective cover to rotate. After the two protective covers come into contact, release the fixing plate. The spring push drives the fixing plate to move, so that the pin and the connecting rod are inserted, which can achieve the limiting effect. At this time, the water outlet pipe is protected by the protective cover.
[0014] 2. This utility model has high hardness, high strength and good wear resistance by setting a high chromium cast iron alloy coating, and high strength, wear resistance and corrosion resistance by setting a copper alloy coating. This results in high strength and makes it less prone to deformation when subjected to impact, thus improving service life. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 3 This is a schematic cross-sectional view of the shell structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the functional layer structure of this utility model;
[0019] Figure 5 This is a cross-sectional structural diagram of the functional layer of this utility model.
[0020] In the diagram: 1. Fire hydrant casting body; 2. Water outlet pipe; 3. Cover plate; 4. Housing; 5. Gear; 6. Shaft; 7. Connecting rod; 8. Protective cover; 9. Fixing plate; 10. Spring; 11. Fixing disc; 12. Prism; 13. Adjusting plate; 14. Pin; 15. Functional layer; 151. High chromium cast iron alloy plating; 152. Copper alloy plating. 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] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0023] Example 1:
[0024] Please see Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides a high-strength, impact-resistant fire hydrant casting, including a fire hydrant casting body 1. Water outlet pipes 2 are connected to the top of both sides of the fire hydrant casting body 1. A cover plate 3 is threadedly connected to one side of each water outlet pipe 2. A housing 4 is fixedly connected to the central axis of both sides of the fire hydrant casting body 1. A gear 5 is installed inside the housing 4. A rotating shaft 6 is fixedly connected to one side of the gear 5. A connecting rod 7 is fixedly connected to one side of the rotating shaft 6. A protective cover 8 is fixedly connected to one side of the connecting rod 7. A fixing plate 9 is fixedly connected to the top of the housing 4. A cover plate 8 is fixedly connected to one side of the fixing plate 9. A spring 10 is connected to a fixed plate 11, a prism 12 is fixedly connected to a fixed plate 11, an adjusting plate 13 is fixedly connected to a fixed plate 12, and a pin 14 is fixedly connected to a fixed plate 13. There are two gears 5, which mesh with each other. The surface of the rotating shaft 6 is movably connected to the housing 4 through a bearing. A round hole is opened on the outer side of the housing 4. A insertion hole is opened on one side of the connecting rod 7, and the insertion hole is adapted to the pin 14. A rectangular groove is opened on one side of the fixed plate 9, and the inner cavity of the rectangular groove is slidably connected to the prism 12.
[0025] The specific function of this technical solution is as follows: After use, when protection is required, push the fixed plate 11 inward. The fixed plate 11 drives the prism 12 to move, the prism 12 drives the adjusting plate 13 to move, the adjusting plate 13 drives the pin 14 to move, and then rotate the connecting rod 7 on one side. The connecting rod 7 drives the corresponding rotating shaft 6 to rotate, the rotating shaft 6 drives the corresponding gear 5 to rotate, and then drives another gear 5 to rotate. The other gear 5 drives the corresponding rotating shaft 6 to rotate, the rotating shaft 6 drives the corresponding connecting rod 7 to rotate, and then the protective cover 8 rotates. After the two protective covers 8 come into contact, release the fixed plate 11. The spring 10 pushes the fixed plate 11 to move, so that the pin 14 is inserted into the connecting rod 7, which can achieve the limiting effect. At this time, the water outlet pipe 2 is protected by the protective cover 8.
[0026] Example 2:
[0027] Based on Embodiment 1, this utility model is as follows: Figure 4 and Figure 5 As shown, the surface of the fire hydrant casting body 1, the outlet pipe 2 and the cover plate 3 is provided with a functional layer 15. The functional layer 15 includes a high-chromium cast iron alloy plating layer 151 and a copper alloy plating layer 152. The high-chromium cast iron alloy plating layer 151 is plated on the surface of the fire hydrant casting body 1, the outlet pipe 2 and the cover plate 3 respectively, and the copper alloy plating layer 152 is plated on the outside of the high-chromium cast iron alloy plating layer 151.
[0028] The specific function of this technical solution is as follows: by setting a high-chromium cast iron alloy coating 151, it has high hardness, high strength and good wear resistance. By setting a copper alloy coating 152, it has high strength, wear resistance and corrosion resistance. This results in high strength, making it less prone to deformation when subjected to impact, and thus improving service life.
[0029] Working principle: After use, when protection is required, push the fixed plate 11 inward. The fixed plate 11 drives the prism 12 to move, the prism 12 drives the adjusting plate 13 to move, the adjusting plate 13 drives the pin 14 to move, and then rotate the connecting rod 7 on one side. The connecting rod 7 drives the corresponding rotating shaft 6 to rotate, the rotating shaft 6 drives the corresponding gear 5 to rotate, and then drives another gear 5 to rotate. The other gear 5 drives the corresponding rotating shaft 6 to rotate, the rotating shaft 6 drives the corresponding connecting rod 7 to rotate, and then the protective cover 8 rotates. After the two protective covers 8 contact, release the fixed plate 11. The spring 10 pushes the fixed plate 11 to move, so that the pin 14 is inserted into the connecting rod 7, which can achieve the limiting effect. At this time, the water outlet pipe 2 is protected by the protective cover 8.
[0030] By setting a high-chromium cast iron alloy coating 151, it has high hardness, high strength and good wear resistance. By setting a copper alloy coating 152, it has high strength, wear resistance and corrosion resistance. This results in high strength and makes it less prone to deformation when subjected to impact, which can improve service life.
[0031] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.
[0032] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A high-strength, impact-resistant fire hydrant casting, comprising a fire hydrant casting body (1), characterized in that: The top of both sides of the fire hydrant casting body (1) is connected to a water outlet pipe (2). A cover plate (3) is threaded to one side of the water outlet pipe (2). A housing (4) is fixedly connected to the central axis on both sides of the fire hydrant casting body (1). A gear (5) is provided in the inner cavity of the housing (4). A rotating shaft (6) is fixedly connected to one side of the gear (5). A connecting rod (7) is fixedly connected to one side of the rotating shaft (6). A protective cover (8) is fixedly connected to one side of the connecting rod (7). A fixing plate (9) is fixedly connected to the top of the housing (4). A spring (10) is fixedly connected to one side of the fixing plate (9). A fixing disc (11) is fixedly connected to one side of the spring (10). A prism (12) is fixedly connected to one side of the fixing disc (11). An adjusting plate (13) is fixedly connected to one side of the prism (12). A pin (14) is fixedly connected to one side of the adjusting plate (13).
2. The high-strength, impact-resistant fire hydrant casting according to claim 1, characterized in that: The surface of the fire hydrant casting body (1), water outlet pipe (2) and cover plate (3) is provided with a functional layer (15), which includes a high chromium cast iron alloy plating layer (151) and a copper alloy plating layer (152).
3. A high-strength, impact-resistant fire hydrant casting according to claim 1, characterized in that: The number of gears (5) is two, and the two gears (5) mesh with each other.
4. A high-strength, impact-resistant fire hydrant casting according to claim 1, characterized in that: The surface of the rotating shaft (6) is movably connected to the housing (4) via a bearing, and a round hole is provided on the outer side of the housing (4).
5. A high-strength, impact-resistant fire hydrant casting according to claim 1, characterized in that: The connecting rod (7) has a socket on one side, and the socket is compatible with the pin (14).
6. A high-strength, impact-resistant fire hydrant casting according to claim 1, characterized in that: A rectangular groove is provided on one side of the fixing plate (9), and the inner cavity of the rectangular groove is slidably connected to the prism (12).
7. A high-strength, impact-resistant fire hydrant casting according to claim 2, characterized in that: The high-chromium cast iron alloy plating (151) is plated on the surface of the fire hydrant casting body (1), the outlet pipe (2) and the cover plate (3), respectively, and the copper alloy plating (152) is plated on the outside of the high-chromium cast iron alloy plating (151).