High-pressure-resistant nodular cast for hydrant valve
By using high-pressure ductile iron castings, interference fits of components such as fixing brackets and limit brackets, and rubber auxiliary rings, the problem of slippage at the connection between fire valves and water pipes is solved, improving pressure resistance and corrosion resistance, and ensuring the stability and durability of the connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN FEISHENG VALVE MFG CO LTD
- Filing Date
- 2025-09-02
- Publication Date
- 2026-07-14
AI Technical Summary
The connection between fire valves and water pipes is prone to slippage due to excessive water pressure, which may lead to leakage or breakage.
The design adopts high-compression ductile iron castings, including components such as fixing brackets, limit brackets, connecting seats, fixing strips, fixing bolts, limit blocks, rubber auxiliary rings, and carbon steel reinforcement layers. Through interference fit and vibration damping by rubber auxiliary rings, the stability and corrosion resistance of the connection are improved.
It effectively improves the high pressure resistance of the connection between the valve body and the water pipe, prevents loosening and corrosion, and ensures the stability and durability of the connection.
Smart Images
Figure CN224497501U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of ductile iron castings, and more particularly to a high-pressure ductile iron casting for fire hydrant valves. Background Technology
[0002] Ductile iron castings are industrial parts made from ductile iron. Their core characteristic is that a special process is used to distribute the graphite in the cast iron in a spherical shape, thereby significantly improving mechanical properties. Ductile iron is a cast iron material obtained through spheroidizing treatment (adding spheroidizing agents such as magnesium and rare earth elements) and inoculation treatment (adding inoculants such as ferrosilicon). After treatment, the graphite changes from the flake shape of ordinary cast iron to a spherical shape, greatly reducing the cutting effect on the metal matrix and making the matrix strength utilization rate reach 70% to 90%. Ductile iron castings are often used in fire hydrant valves. Fire hydrant valves are the core components of fire hydrant systems that control the flow of water. The mechanical movement of the opening and closing parts realizes the control of the fire water source. When using a conventional fire hydrant valve, after the valve body is connected to the water pipe, a rotating frame is rotatably connected to the top of the valve body. A ball valve is installed at the bottom of the rotating frame. The surface of the ball valve is rotatably installed with the inner wall of the valve body, so as to control the rotation of the ball valve with the help of the rotating frame, thereby controlling the flow of water in the valve body.
[0003] Regarding the aforementioned technologies, the inventors believe that fire valves and water pipes are often connected by bolts. However, fire valves often have high water pressure to ensure the impact force of water flow. During long-term use, the bolts are prone to stripping due to excessive pressure, which can lead to leakage or even breakage at the connection between the fire valve and the water pipe.
[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content
[0005] To address the problem of water leakage at the connection between fire hydrant valves and water pipes caused by excessive water pressure, this application provides a high-pressure ductile iron casting for fire hydrant valves.
[0006] This application provides a high-compression-resistant ductile iron casting for fire hydrant valves, employing the following technical solution:
[0007] A high-pressure ductile iron casting for a fire hydrant valve includes a valve body and a fixing bracket. A rotating bracket is rotatably mounted on the top of the valve body, with the center of the rotating bracket and the center of the valve body collinear. A ball valve is fixedly connected to the bottom end of the rotating bracket, and the surface of the ball valve is rotatably mounted to the inner wall of the valve body. A limit bracket is rotatably connected to one end of the fixing bracket, and a connecting seat is fixedly mounted to the bottom end of the limit bracket. A fixing strip is rotatably connected to the inner wall of the connecting seat. A connecting bracket is fixedly connected to the bottom end of the fixing bracket, and a fixing bolt is installed on the internal thread of the connecting bracket. The dimensions of the ball valve surface are interference-fitted with the dimensions of the valve body's inner wall. The inner walls of both the fixing bracket and the limit bracket are snapped into one end of the valve body, and the dimensions of the inner walls of both the fixing bracket and the limit bracket are adapted to the dimensions of one end of the valve body. The connecting bracket has a U-shaped cross-section, and the inner wall of the connecting bracket is slidably mounted to the surface of the fixing strip.
[0008] Preferably, a limiting block is rotatably connected to the top of the fixing bolt, the surface of the limiting block is slidably installed with the inner wall of the connecting frame, and the top of the limiting block is engaged with the bottom end of the fixing strip.
[0009] Preferably, the bottom end of the fixing strip is provided with a plurality of slots that are adapted to the limiting block, and the plurality of slots are evenly distributed at the bottom end of the fixing strip.
[0010] Preferably, a limiting ring is movably mounted on the surface of the fixing bolt, the center of the limiting ring is on the same straight line as the center of the fixing bolt, and the top of the limiting ring is movably connected to the bottom of the connecting frame.
[0011] Preferably, both the fixing frame and the limiting frame have auxiliary rings installed on their inner walls. The inner wall of the auxiliary ring is movably connected to the surface of the valve body, and the dimensions of the auxiliary ring surface are interference-fitted with the inner wall of the fixing frame. The auxiliary ring is a rubber ring.
[0012] Preferably, a reinforcing layer is fixedly installed on the inner wall of the valve body. The reinforcing layer is made of carbon steel, and the dimensions of the reinforcing layer surface are compatible with the dimensions of the inner wall of the valve body.
[0013] Preferably, a protective layer is fixedly connected to the surface of the valve body, and the protective layer is made of polytetrafluoroethylene.
[0014] In summary, this application includes the following beneficial technical effects:
[0015] 1. By installing a fixing bracket on the surface of the valve body, a connecting seat is mounted on the surface of the fixing bracket via a limiting bracket, and a connecting bracket is connected to the surface of the connecting seat via a fixing strip. A fixing bolt is threaded inside the connecting bracket to secure the fixing strip by rotating the fixing bolt. This reinforces the connection between the valve body and the water pipe using the fixing bracket and the limiting bracket. A limiting block is rotatably connected to the top of the fixing bolt to prevent slippage of the fixing strip and loosening of the fixing bracket and the limiting bracket. Several slots are provided at the bottom of the fixing strip to fix it in different positions, thereby adjusting the tightness of the fixing bracket and the limiting bracket. A limiting ring is installed on the surface of the fixing bolt to improve its stability. Compared with existing technologies, this effectively improves the high-pressure resistance of the connection between the valve body and the water pipe.
[0016] 2. Rubber auxiliary rings can also be installed on the inner walls of both the fixed frame and the limiting frame to prevent vibration of the fixed frame and the limiting frame on the valve body surface when water flows. The inside of the valve body is equipped with a carbon steel reinforcing layer to ensure the valve body's resistance to water flow impact. The surface of the valve body is equipped with a polytetrafluoroethylene (PTFE) protective layer to enhance the overall corrosion resistance of the valve body; thus effectively improving the performance of the device. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a high-pressure ductile iron casting for a fire hydrant valve according to an embodiment of the application.
[0018] Figure 2 This is a schematic diagram of the fixing frame structure according to the application embodiment;
[0019] Figure 3 This is a side view of the embodiment of the application.
[0020] Figure 4 This is a schematic diagram of the structure at point A in the embodiment of the application.
[0021] Explanation of reference numerals in the attached drawings: 1. Valve body; 2. Rotating frame; 3. Ball valve; 4. Fixed frame; 5. Limiting frame; 6. Connecting seat; 7. Fixing strip; 8. Slot; 9. Limiting block; 10. Connecting frame; 11. Fixing bolt; 12. Limiting ring; 13. Auxiliary ring; 14. Reinforcing layer; 15. Protective layer. Detailed Implementation
[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0023] This application discloses a high-pressure ductile iron casting for fire hydrant valves, with reference to... Figure 1 - Figure 2The system includes a valve body 1. In use, after connecting the valve body 1 to the water pipe, a rotating frame 2 is rotatably connected to the top of the valve body 1. A ball valve 3 is installed at the bottom of the rotating frame 2. The surface of the ball valve 3 is rotatably installed against the inner wall of the valve body 1. The rotating frame 2 controls the rotation of the ball valve 3, thereby controlling the flow of water in the valve body 1. A fixing frame 4 is installed on the surface of the valve body 1. A limit frame 5 is rotatably connected to the surface of the fixing frame 4. A connecting seat 6 is installed at the bottom of the limit frame 5. A fixing strip 7 is rotatably connected to the surface of the connecting seat 6. A connecting frame 10 is slidably connected to the surface of the fixing strip 7. The top of the connecting frame 10 is connected to the fixing frame 4, and a fixing bolt 11 is threaded inside the connecting frame 10. The fixing frame 4 and the limit frame 5 are installed at the connection between the valve body 1 and the water pipe, and the fixing bolt 11 is rotated to fix the fixing strip 7. Thus, the fixing frame 4 and the limit frame 5 reinforce the connection between the valve body 1 and the water pipe, effectively improving the high pressure resistance of the connection between the valve body 1 and the water pipe.
[0024] Reference Figure 2 The top of the fixing bolt 11 is rotatably connected to the limiting block 9. The surface of the limiting block 9 slides inside the connecting frame 10, and the top of the limiting block 9 is connected to the bottom end of the fixing strip 7. The limiting block 9 increases the friction between the fixing bolt 11 and the slot 8, preventing the fixing strip 7 from slipping and causing the fixing frame 4 and the limiting frame 5 to loosen. Several slots 8 are opened at the bottom end of the fixing strip 7. The inner wall of the slot 8 is engaged with the top of the limiting block 9. The slots 8 fix the fixing strip 7 in different positions, thereby adjusting the tightness of the installation of the fixing frame 4 and the limiting frame 5, and improving the fixing effect between the fixing strip 7 and the limiting block 9. A limiting ring 12 is installed on the surface of the fixing bolt 11. The top of the limiting ring 12 is connected to the bottom end of the connecting frame 10. The limiting ring 12 improves the stability of the fixing bolt 11 and prevents the slot 8 from separating from the limiting block 9 due to the loosening of the limiting ring 12.
[0025] Reference Figure 2 - Figure 4 Rubber auxiliary rings 13 are installed on the inner walls of both the fixing frame 4 and the limiting frame 5. The inner wall of the auxiliary ring 13 is connected to one end of the valve body 1. The auxiliary rings 13 separate the fixing frame 4, the limiting frame 5 and the valve body 1, avoiding the problem of vibration of the fixing frame 4 and the limiting frame 5 on the surface of the valve body 1 when water flows. A carbon steel reinforcing layer 14 is installed inside the valve body 1. The reinforcing layer 14 improves the internal pressure resistance of the valve body 1, thereby ensuring the resistance of the valve body 1 to water flow impact. A polytetrafluoroethylene protective layer 15 is installed on the surface of the valve body 1. The polytetrafluoroethylene protective layer 15 has corrosion-resistant properties, thereby improving the overall corrosion resistance of the valve body 1 and avoiding the problem of corrosion when the valve body 1 is installed outdoors.
[0026] The implementation principle of a high-pressure ductile iron casting for a fire hydrant valve according to an embodiment of this application is as follows: A fixing bracket 4 is installed on the surface of the valve body 1. A limiting bracket 5 is rotatably connected to the surface of the fixing bracket 4. A connecting seat 6 is installed at the bottom of the limiting bracket 5. A fixing strip 7 is rotatably connected to the surface of the connecting seat 6. A connecting bracket 10 is slidably connected to the surface of the fixing strip 7. The top of the connecting bracket 10 is connected to the fixing bracket 4, and a fixing bolt 11 is threaded inside the connecting bracket 10 to facilitate the installation of the fixing bracket 4 and the limiting bracket 5 at the connection between the valve body 1 and the water pipe. The fixing bolt 11 is rotated to fix the fixing strip 7, thereby reinforcing the connection between the valve body 1 and the water pipe through the fixing bracket 4 and the limiting bracket 5. A limiting block 9 is rotatably connected to the top of the fixing bolt 11, and the surface of the limiting block 9 is connected to the connecting bracket. The internal sliding mechanism of the 10-connector is such that the top of the limiting block 9 is connected to the bottom of the fixing strip 7, thereby increasing the friction between the fixing bolt 11 and the slot 8 and preventing the fixing strip 7 from slipping and causing the fixing frame 4 and the limiting frame 5 to loosen. Several slots 8 are provided at the bottom of the fixing strip 7, and the inner wall of the slot 8 is engaged with the top of the limiting block 9, so as to fix the fixing strip 7 in different positions, thereby adjusting the installation tightness of the fixing frame 4 and the limiting frame 5 and improving the fixing effect between the fixing strip 7 and the limiting block 9. A limiting ring 12 is installed on the surface of the fixing bolt 11, and the top of the limiting ring 12 is connected to the bottom of the connecting frame 10, so as to improve the stability of the fixing bolt 11 and prevent the limiting ring 12 from loosening and causing the slot 8 and the limiting block 9 to separate.
[0027] Rubber auxiliary rings 13 can also be installed on the inner walls of the fixing frame 4 and the limiting frame 5. The inner wall of the auxiliary ring 13 is connected to one end of the valve body 1, so as to separate the fixing frame 4, the limiting frame 5 and the valve body 1 with the auxiliary ring 13, so as to avoid the problem of vibration of the fixing frame 4 and the limiting frame 5 on the surface of the valve body 1 when the water flows. A carbon steel reinforcing layer 14 is installed inside the valve body 1, so as to improve the internal pressure resistance of the valve body 1, thereby ensuring the resistance of the valve body 1 to water flow impact. A polytetrafluoroethylene protective layer 15 is installed on the surface of the valve body 1, so as to improve the overall corrosion resistance of the valve body 1 with the corrosion-resistant properties of polytetrafluoroethylene, thereby avoiding the problem of corrosion of the valve body 1 when installed outdoors.
[0028] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A high-pressure ductile iron casting for a fire hydrant valve, comprising a valve body (1) and a fixing bracket (4), characterized in that: A rotating frame (2) is rotatably mounted on the top of the valve body (1). The center of the rotating frame (2) is on the same straight line as the center of the valve body (1). A ball valve (3) is fixedly connected to the bottom end of the rotating frame (2). The surface of the ball valve (3) is rotatably mounted to the inner wall of the valve body (1). A limit frame (5) is rotatably connected to one end of the fixed frame (4). A connecting seat (6) is fixedly mounted to the bottom end of the limit frame (5). A fixing strip (7) is rotatably connected to the inner wall of the connecting seat (6). A connecting frame (10) is fixedly connected to the bottom end of the fixed frame (4). A fixing bolt (11) is installed on the internal thread of the connecting frame (10).
2. The high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: The dimensions of the ball valve (3) are interference-fitted with the inner wall dimensions of the valve body (1). The inner walls of the fixing bracket (4) and the limiting bracket (5) are both snapped into one end of the valve body (1), and the dimensions of the inner walls of the fixing bracket (4) and the limiting bracket (5) are adapted to the dimensions of one end of the valve body (1). The cross-section of the connecting bracket (10) is U-shaped, and the inner wall of the connecting bracket (10) is slidably installed on the surface of the fixing strip (7).
3. A high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: The top of the fixing bolt (11) is rotatably connected to the limiting block (9), the surface of the limiting block (9) is slidably installed with the inner wall of the connecting frame (10), and the top of the limiting block (9) is engaged with the bottom of the fixing strip (7).
4. A high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: The bottom end of the fixing strip (7) is provided with several slots (8) that are adapted to the limiting block (9), and the several slots (8) are evenly distributed at the bottom end of the fixing strip (7).
5. A high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: A limiting ring (12) is movably mounted on the surface of the fixing bolt (11). The center of the limiting ring (12) is on the same straight line as the center of the fixing bolt (11), and the top of the limiting ring (12) is movably connected to the bottom of the connecting frame (10).
6. A high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: Both the inner walls of the fixed frame (4) and the limiting frame (5) are equipped with auxiliary rings (13). The inner wall of the auxiliary ring (13) is movably connected to the surface of the valve body (1), and the size of the surface of the auxiliary ring (13) is interference-fitted with the inner wall of the fixed frame (4). The auxiliary ring (13) is a rubber ring.
7. A high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: The inner wall of the valve body (1) is fixedly installed with a reinforcing layer (14), which is made of carbon steel and the size of the surface of the reinforcing layer (14) is compatible with the size of the inner wall of the valve body (1).
8. A high-pressure ductile iron casting for a fire hydrant valve according to claim 1, characterized in that: The surface of the valve body (1) is fixedly connected with a protective layer (15), which is made of polytetrafluoroethylene.