A precision ductile iron casting for a stainless steel fire hydrant valve
By incorporating structures such as mud and sand discharge pipes, threaded rings, connecting caps, and filter screens into the design of fire valves, the problem of mud and sand blockage is solved, enabling convenient cleaning and improved sealing, thus enhancing the effectiveness of fire valves.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN FEISHENG VALVE MFG CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-05-26
AI Technical Summary
Conventional fire valves are easily clogged by silt in areas with poor water quality, and cleaning them is inconvenient and requires complete disassembly, making operation complicated.
A stainless steel fire hydrant valve was designed, comprising a mud and sand discharge pipe, a threaded ring, a connecting cover, a storage rack, a mud and sand filter screen, and a separation plate. Through the threaded connection and sealing ring structure, mud and sand are separated, filtered, and collected, preventing blockage and improving sealing performance.
It effectively prevents silt blockage, simplifies the cleaning process, improves the ease of use and sealing of fire valves, and prevents water leakage.
Smart Images
Figure CN224283612U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fire hydrant valves, and more particularly to a precision ductile iron casting for a stainless steel fire hydrant valve. Background Technology
[0002] Fire hydrant valves are key accessories for controlling fluid flow in industrial and building pipelines. They mainly consist of the valve body, opening and closing mechanism, and valve cover, and are characterized by simple structure and reliable sealing. Common types include fire signal butterfly valves, rising stem resilient seated gate valves, water flow indicators, and wet alarm valves. Among them, the signal butterfly valve adopts a centerline type clamp design, the rising stem gate valve can intuitively display the opening and closing status through the external stem position, and the water flow indicator can convert the water flow signal into an electrical signal for sprinkler system monitoring. These valves are widely used in fire protection systems, high-rise buildings, and industrial projects, covering scenarios such as water supply and drainage, deluge systems, and water curtain systems. Fire hydrant valves are often made of ductile iron castings. Ductile iron is formed by adding spheroidizing agents to cast iron, and has the characteristics of high strength, good plasticity and toughness, wear resistance, shock resistance, and good casting performance. When using a conventional ductile iron fire hydrant valve, after connecting the fire hydrant valve body to the water pipe, a control frame is installed on the top of the fire hydrant valve body. The opening and closing mechanism inside the fire hydrant valve body is operated by the control frame to control the flow of water.
[0003] Regarding the aforementioned technologies, the inventors believe that conventional fire valves, due to their internal recessed structure, are prone to blockage due to prolonged sediment accumulation when used in areas with poor water quality. Furthermore, conventional fire valves are mostly integrated, requiring the entire valve to be disassembled for cleaning sediment, thus causing inconvenience in valve cleaning.
[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. Summary of the Invention
[0005] To address the problem of mud and sand clogging fire hydrant valves, this application provides a precision ductile iron casting for stainless steel fire hydrant valves.
[0006] The technical solution provided in this application for a precision ductile iron casting of a stainless steel fire hydrant valve is as follows:
[0007] A precision ductile iron casting of a stainless steel fire hydrant valve includes a fire hydrant valve body and a sludge discharge pipe. A control frame is rotatably mounted on the top of the fire hydrant valve body. A threaded ring is welded to the bottom end of the sludge discharge pipe. A connecting cover is threadedly connected to the surface of the threaded ring. The inner wall of the connecting cover is sized to match the surface size of the threaded ring. A storage rack is fixedly mounted on the top of the connecting cover. One end of the storage rack has a feed inlet. The top of the sludge discharge pipe is welded to the bottom end of the fire hydrant valve body, and the center of the sludge discharge pipe is on the same straight line as the center of the fire hydrant valve body. The inner wall of the feed inlet is connected to the inner wall of the fire hydrant valve body.
[0008] Preferably, the connecting cover has a fixing bolt installed on its internal thread, one end of which is engaged with the surface of the threaded ring, and the fixing bolt and the threaded ring are arranged perpendicularly to each other.
[0009] Preferably, a plurality of sealing rings are fixedly installed on the surface of the connecting cover. The plurality of sealing rings are evenly distributed on the surface of the connecting cover, and the sealing rings are rubber rings. The surface of the sealing rings is movably installed with the inner wall of the mud and sand discharge pipe, and the size of the sealing ring surface is interference-fitted with the size of the inner wall of the mud and sand discharge pipe.
[0010] Preferably, a mud and sand filter screen is fixedly installed on the inner wall of the storage rack, and the size and specifications of the surface of the mud and sand filter screen are adapted to the size and specifications of the inner wall of the storage rack.
[0011] Preferably, a plurality of shielding frames are fixedly connected to the bottom end of the mud and sand filter screen, and the plurality of shielding frames are evenly distributed at the bottom end of the mud and sand filter screen, and the surface of the shielding frames is fixedly installed to the inner wall of the connecting cover.
[0012] Preferably, a feed rack is fixedly connected to the inner wall of the fire hydrant valve body, and a plurality of separation plates are fixedly installed on the inner wall of the feed rack.
[0013] Preferably, the separation plate has connecting holes inside, and several separation plates are evenly distributed on the inner wall of the feed rack.
[0014] In summary, this application includes the following beneficial technical effects:
[0015] 1. A threaded ring is connected to the bottom of the fire hydrant valve body via a mud and sand discharge pipe. A collection rack is installed on the surface of the threaded ring via a connecting cover. One end of the collection rack has an inlet to facilitate the separation of mud and sand in the water flow. After separating the mud and sand discharge pipe from the threaded ring, it is convenient to handle the mud and sand. The internal thread of the connecting cover is connected with a fixing bolt to reinforce the threaded ring and the connecting cover after installation, thereby improving the fixing effect between the threaded ring and the connecting cover. Several rubber sealing rings are fixedly installed on the surface of the connecting cover to improve the sealing between the connecting cover and the mud and sand discharge pipe. Compared with the existing technology, this method effectively improves the convenience of removing mud and sand from the fire hydrant valve.
[0016] 2. A sediment filter screen can also be installed on the inner wall of the storage rack to facilitate the removal of sediment from the water flow. Several baffles are installed at the bottom of the sediment filter screen to store the sediment and prevent it from being washed away by the water flow. A feed rack is installed on the inner wall of the fire hydrant valve body, and several separation plates are installed on the inner wall of the feed rack to block sediment in the water flow inside the fire hydrant valve body. The separation plates have connection holes inside to introduce sediment into the inner wall of the feed inlet; this effectively improves the performance of the device. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a precision ductile iron casting for a stainless steel fire hydrant valve according to an embodiment of the application.
[0018] Figure 2 This is a schematic diagram of the sludge discharge pipe structure in the embodiment of the application;
[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. Fire hydrant valve body; 2. Control frame; 3. Sediment discharge pipe; 4. Threaded ring; 5. Connecting cover; 6. Fixing bolt; 7. Sealing ring; 8. Storage rack; 9. Inlet; 10. Sediment filter screen; 11. Shielding frame; 12. Inlet rack; 13. Separation plate; 14. Connecting hole. 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 precision ductile iron casting for a stainless steel fire hydrant valve, referring to... Figure 1 - Figure 2 The system includes a fire hydrant valve body 1. During use, the fire hydrant valve body 1 is connected to a water pipe. A control frame 2 is installed on the top of the fire hydrant valve body 1. The control frame 2 is used to operate the opening and closing structure inside the fire hydrant valve body 1 to control the flow of water. A mud and sand discharge pipe 3 is installed at the bottom of the fire hydrant valve body 1. A threaded ring 4 is threaded to the surface of the mud and sand discharge pipe 3. A connecting cover 5 is installed on the surface of the threaded ring 4. A storage rack 8 is installed on the top of the connecting cover 5. An inlet 9 is opened at one end of the storage rack 8. The mud and sand present in the water flow is separated by the inlet 9. After the mud and sand discharge pipe 3 is separated from the threaded ring 4, it is convenient to handle the mud and sand, avoiding the problem of mud and sand accumulation causing blockage inside the fire hydrant valve body 1.
[0024] Reference Figure 2 The connecting cover 5 has a threaded connection with a fixing bolt 6. One end of the fixing bolt 6 is engaged with the surface of the threaded ring 4. After the threaded ring 4 and the connecting cover 5 are installed, the fixing bolt 6 is used to reinforce them, thereby improving the fixing effect between the threaded ring 4 and the connecting cover 5. This avoids the problem of the connecting cover 5 becoming loose due to water flow impact, which could lead to separation from the sediment discharge pipe 3. Several rubber sealing rings 7 are fixedly installed on the surface of the connecting cover 5. The surface of the sealing rings 7 is connected to the inner wall of the sediment discharge pipe 3. The sealing rings 7 improve the sealing between the connecting cover 5 and the sediment discharge pipe 3, effectively preventing the risk of water leakage between the sediment discharge pipe 3 and the connecting cover 5.
[0025] Reference Figure 2 - Figure 4 A sediment filter screen 10 is installed on the inner wall of the storage rack 8. The sediment filter screen 10 facilitates the removal of sediment from the water flow, thereby ensuring the sediment removal effect of the storage rack 8. Several baffles 11 are installed at the bottom of the sediment filter screen 10. The surface of the baffles 11 is connected to the inner wall of the storage rack 8. The baffles 11 store the sediment and prevent the sediment stored in the storage rack 8 from being washed away by the water flow. A feed rack 12 is installed on the inner wall of the fire hydrant valve body 1. Several separation plates 13 are installed on the inner wall of the feed rack 12. The separation plates 13 block the sediment in the water flow in the fire hydrant valve body 1, thereby improving the sediment removal effect of the device. The separation plates 13 have connecting holes 14 inside. The sediment is introduced into the inner wall of the feed inlet 9 through the connecting holes 14, which effectively improves the sediment collection effect.
[0026] The implementation principle of a precision ductile iron casting for a stainless steel fire hydrant valve in this application embodiment is as follows: A mud and sand discharge pipe 3 is installed at the bottom of the fire hydrant valve body 1. A threaded ring 4 is connected to the surface of the mud and sand discharge pipe 3, and a connecting cover 5 is installed on the surface of the threaded ring 4. A storage rack 8 is installed on the top of the connecting cover 5. One end of the storage rack 8 has an inlet 9, which facilitates the separation of mud and sand in the water flow. After separating the mud and sand discharge pipe 3 from the threaded ring 4, it is convenient to handle the mud and sand, avoiding the problem of mud and sand accumulation causing blockage inside the fire hydrant valve body 1. A fixing bolt 6 is connected to the internal thread of the connecting cover 5. One end of the fixing bolt 6 is engaged with the surface of the threaded ring 4, so that after the threaded ring 4 and the connecting cover 5 are installed, the fixing bolt 6 can be used to reinforce them, thereby improving the fixing effect between the threaded ring 4 and the connecting cover 5. This avoids the problem of the connecting cover 5 becoming loose due to the impact of water flow, which could lead to separation from the sediment discharge pipe 3. Several rubber sealing rings 7 are fixedly installed on the surface of the connecting cover 5. The surface of the sealing rings 7 is connected to the inner wall of the sediment discharge pipe 3, so as to improve the sealing between the connecting cover 5 and the sediment discharge pipe 3, effectively preventing the risk of water leakage between the sediment discharge pipe 3 and the connecting cover 5.
[0027] A sediment filter screen 10 can also be installed on the inner wall of the storage rack 8 to facilitate the removal of sediment from the water flow, thereby ensuring the sediment removal effect of the storage rack 8. Several baffles 11 are installed at the bottom of the sediment filter screen 10. The surface of the baffles 11 is connected to the inner wall of the storage rack 8 to store the sediment and prevent the water flow from washing away the sediment stored in the storage rack 8. A feed rack 12 is installed on the inner wall of the fire hydrant valve body 1. Several separation plates 13 are installed on the inner wall of the feed rack 12 to block the sediment in the water flow inside the fire hydrant valve body 1, thereby improving the sediment removal effect of the device. The separation plates 13 have connecting holes 14 inside to introduce the sediment into the inner wall of the feed inlet 9, effectively improving the sediment collection effect.
[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 precision ductile iron casting for a stainless steel fire hydrant valve, comprising a fire hydrant valve body (1) and a mud and sand discharge pipe (3), characterized in that: A control frame (2) is rotatably mounted on the top of the fire hydrant valve body (1). A threaded ring (4) is welded to the bottom end of the mud and sand discharge pipe (3). A connecting cover (5) is threadedly connected to the surface of the threaded ring (4). The inner wall size of the connecting cover (5) is compatible with the surface size of the threaded ring (4). A storage rack (8) is fixedly mounted on the top of the connecting cover (5). An inlet (9) is opened at one end of the storage rack (8).
2. The precision ductile iron casting for a stainless steel fire hydrant valve according to claim 1, characterized in that: The top of the mud and sand discharge pipe (3) is welded to the bottom of the fire hydrant valve body (1), and the center of the mud and sand discharge pipe (3) and the center of the fire hydrant valve body (1) are on the same straight line. The inner wall of the inlet (9) is connected to the inner wall of the fire hydrant valve body (1).
3. A precision ductile iron casting for a stainless steel fire hydrant valve according to claim 1, characterized in that: The internal thread of the connecting cover (5) is fitted with a fixing bolt (6), one end of which is engaged with the surface of the threaded ring (4), and the fixing bolt (6) and the threaded ring (4) are perpendicular to each other.
4. A precision ductile iron casting for a stainless steel fire hydrant valve according to claim 1, characterized in that: A number of sealing rings (7) are fixedly installed on the surface of the connecting cover (5). The sealing rings (7) are evenly distributed on the surface of the connecting cover (5). The sealing rings (7) are rubber rings. The surface of the sealing rings (7) is movably installed with the inner wall of the mud and sand discharge pipe (3). The size of the surface of the sealing rings (7) is interference-fitted with the size of the inner wall of the mud and sand discharge pipe (3).
5. A precision ductile iron casting for a stainless steel fire hydrant valve according to claim 1, characterized in that: The inner wall of the storage rack (8) is fixedly installed with a mud and sand filter screen (10), and the size of the surface of the mud and sand filter screen (10) is compatible with the size of the inner wall of the storage rack (8).
6. A precision ductile iron casting for a stainless steel fire hydrant valve according to claim 5, characterized in that: The bottom end of the mud and sand filter (10) is fixedly connected to several shielding frames (11). The several shielding frames (11) are evenly distributed at the bottom end of the mud and sand filter (10), and the surface of the shielding frame (11) is fixedly installed with the inner wall of the connecting cover (5).
7. A precision ductile iron casting for a stainless steel fire hydrant valve according to claim 1, characterized in that: The inner wall of the fire hydrant valve body (1) is fixedly connected to a feed rack (12), and the inner wall of the feed rack (12) is fixedly installed with several separation plates (13).
8. A precision ductile iron casting for a stainless steel fire hydrant valve according to claim 7, characterized in that: The separation plate (13) has a connection hole (14) inside, and several separation plates (13) are evenly distributed on the inner wall of the feed rack (12).