Anti-backflow fire valve

Abstract

The utility model relates to the technical field of fire-fighting engineering, in particular to an anti-backflow fire-fighting valve which comprises a main valve body, a thread bushing, a driven gear, a screw rod, a limiting plate, a sealing body, a positioning rod, a check plate, a spring, a U-shaped plate, two limiting rods, a protective cover, a rotating shaft and a driving gear, water outlets are formed in the two sides of the main valve body, and a water inlet is formed in the lower portion of the main valve body. The rotating shaft is driven by external power equipment, and the check plate can ascend and descend under the action of the positioning rod, the sealing body, the screw rod, the threaded sleeve, the driven gear and the driving gear, so that opening and closing of the main valve body are controlled, and then unused people and the like cannot open and close the main valve body; and then, only authorized personnel can operate the fire valve, so that potential safety risks caused by misoperation of non-professional personnel are avoided.

Description

Technical Field

[0001] This utility model relates to the field of fire protection engineering technology, and in particular to a fire valve that prevents backflow. Background Technology

[0002] In fire protection engineering, fire valves are an important accessory for controlling industrial and building pipelines. They are characterized by simple structure and reliable sealing. Fire valves can control the flow of water, air, and other fluids in the fire protection system, ensuring that they can be quickly opened or closed when needed to meet fire protection requirements. Fire valves are an important component for pipeline control in industrial and building pipelines. Fire valves consist of three main parts: valve body, opening and closing mechanism, and valve cover. Valves are control components in fluid transportation systems, with functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, diversion, or overflow pressure relief. Currently, because most valves do not have check valve mechanisms, backflow of water in the pipeline can occur during daily use. They cannot provide a fixed direction for the flow of the medium in the pipeline, making leakage and backflow more likely.

[0003] Existing patent CN215371128U discloses a backflow-preventing fire valve, including a main valve body. An adjusting threaded rod is threadedly connected to the center of the top surface of the main valve body. A round wheel is fixedly connected to the top of the adjusting threaded rod. The bottom end of the adjusting threaded rod penetrates the center of the top surface of the main valve body and extends to the upper part of the inner cavity of the main valve body, with an extension rod sleeved on the bearing. This prior art, through the setting of a check plate, utilizes the cooperation between the bearing support frame, positioning rod, check plate, check spring, and pressure regulating plate to limit the flow direction of the medium flowing into the main valve body from the bottom, preventing backflow. Furthermore, the setting of the adjusting threaded rod, round wheel, and extension rod allows for adjustable adjustment of the check plate to adapt to the medium pressure, limiting the pressure of the medium flowing into the main valve body. If the pressure is too low, the check plate cannot be opened, thereby improving the practicality of the fire valve.

[0004] However, in the aforementioned existing technologies, since some fire valves are installed outdoors, the risk of unauthorized personnel opening the valves cannot be eliminated, which means that the opening and closing of the valves cannot be guaranteed. Utility Model Content

[0005] The purpose of this utility model is to provide a fire valve that prevents backflow, aiming to solve the technical problem in the prior art where some fire valves are installed outdoors, thus failing to eliminate the risk of unauthorized personnel opening the valves, which leads to the inability to guarantee the opening and closing of the valves.

[0006] To achieve the above objectives, this utility model employs a backflow-preventing fire valve, comprising a main valve body with outlets on both sides and an inlet at the bottom. A threaded sleeve is rotatably mounted on the top of the main valve body, with a driven gear at one end. A screw is threaded into the inner thread of the threaded sleeve, a limiting plate is mounted above the screw, a sealing body is mounted below the screw, a positioning rod is slidably mounted below the sealing body, a check plate is mounted below the positioning rod, and a spring is welded between the check plate and the sealing body. A U-shaped plate, two limiting rods, and a protective cover are mounted above the main valve body. A rotating shaft is rotatably mounted on the U-shaped plate, and a driving gear is mounted below the rotating shaft, meshing with the driven gear. The limiting plate is sleeved on the two limiting rods.

[0007] The check plate abuts against the water inlet, a sealing sleeve is provided on the outside of the sealing body and the sealing sleeve abuts against the inner wall of the main valve body, a positioning ring is provided above the positioning rod, the sealing body has a positioning groove and the positioning ring is located in the positioning groove.

[0008] The U-shaped plate is located outside the threaded sleeve, the threaded sleeve is located between the two limiting rods, and the U-shaped plate, the limiting plate, the threaded sleeve and the two limiting rods are all located inside the protective cover.

[0009] The backflow prevention fire valve also includes two outlet pipes and an inlet pipe. Both the outlet pipes and the inlet pipes are equipped with flanges. The two outlet pipes are respectively connected to the main valve body and located at the corresponding outlet. The inlet pipe is connected to the main valve body and located at the inlet.

[0010] The other end of the threaded sleeve is provided with a limiting ring, the top of the main valve body has a rotating groove, the inner side of the rotating groove has a limiting groove, and the limiting ring is located in the limiting groove.

[0011] The protective cover has multiple strip-shaped blocks on its inner side, and the main valve body has multiple strip-shaped grooves on its top outer side. The protective cover is fixedly connected to the main valve body by screws and covers the main valve body, and multiple limiting strips are located in the corresponding strip-shaped grooves.

[0012] This utility model discloses a backflow prevention fire valve, comprising a main valve body with outlets on both sides and an inlet at the bottom. A threaded sleeve is rotatably mounted on the top of the main valve body, with a driven gear at one end. A screw is threaded into the inner thread of the threaded sleeve, a limit plate is mounted above the screw, a sealing body is mounted below the screw, a positioning rod is slidably mounted below the sealing body, a check plate is mounted below the positioning rod, and a spring is welded between the check plate and the sealing body. A U-shaped plate, two limit rods, and a protective cover are mounted above the main valve body. A rotating shaft is rotatably mounted on the U-shaped plate, and a [missing information - likely a device or structure] is mounted below the rotating shaft. Equipped with a drive gear, the rotating shaft is driven by an external power device. The check plate can be raised and lowered by the positioning rod, the sealing body, the screw, the threaded sleeve, the driven gear, and the drive gear, thereby controlling the opening and closing of the main valve body. This prevents unauthorized personnel from opening and closing the main valve body, ensuring that only authorized personnel can operate the fire valve. This avoids potential safety risks caused by misoperation by non-professionals. In this way, it solves the technical problem that some fire valves are located outdoors, which cannot eliminate the risk of unauthorized personnel opening the valves, thus compromising the guarantee of valve opening and closing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional view of the present invention.

[0015] Figure 2 This is the front view of this utility model.

[0016] Figure 3 This is the utility model Figure 2 A cross-sectional view along line AA in the middle.

[0017] Figure 4 This is the utility model Figure 3 A cross-sectional view along the BB line.

[0018] Figure 5 This is the utility model Figure 4 A cross-sectional view of the CC line.

[0019] Figure 6 This is a schematic diagram of the structure of the protective cover in this utility model.

[0020] Figure 7 This is a schematic diagram of the main valve body in this utility model.

[0021] 1-Main valve body, 2-Outlet, 3-Inlet, 4-Threaded sleeve, 5-Driven gear, 6-Screw, 7-Limit plate, 8-Sealing body, 9-Positioning rod, 10-Check plate, 11-Spring, 12-U-shaped plate, 13-Limiting rod, 14-Protective cover, 15-Rotating shaft, 16-Drive gear, 17-Sealing sleeve, 18-Positioning ring, 19-Positioning groove, 20-Outlet pipe, 21-Inlet pipe, 22-Flange, 23-Limiting ring, 24-Rotating groove, 25-Limiting groove, 26-Strip block, 27-Strip groove. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] Please see Figures 1 to 7This utility model provides a backflow-preventing fire valve, including a main valve body 1. The main valve body 1 has outlets 2 on both sides and an inlet 3 at its bottom. A threaded sleeve 4 is rotatably mounted on the top of the main valve body 1. A driven gear 5 is mounted on one end of the threaded sleeve 4. A screw 6 is threaded internally onto the threaded sleeve 4. A limit plate 7 is mounted above the screw 6. A sealing body 8 is mounted below the screw 6. A positioning rod 9 is slidably mounted below the sealing body 8. A check plate 10 is mounted below the positioning rod 9. A spring 11 is welded between the check plate 10 and the sealing body 8. A U-shaped plate 12, two limit rods 13, and a protective cover 14 are mounted above the main valve body 1. A rotating shaft 15 is rotatably mounted on the U-shaped plate 12. A driving gear 16 is mounted below the rotating shaft 15. Furthermore, the driving gear 16 meshes with the driven gear 5, and the limiting plate 7 is sleeved on the two limiting rods 13. The rotating shaft 15 is driven by an external power device, and the check plate 10 can be raised and lowered under the action of the positioning rod 9, the sealing body 8, the screw 6, the threaded sleeve 4, the driven gear 5, and the driving gear 16, thereby controlling the opening and closing of the main valve body 1. This prevents unauthorized personnel from opening and closing the main valve body 1, ensuring that only authorized personnel can operate the fire valve. This avoids potential safety risks caused by misoperation by non-professionals. In this way, the technical problem of the inability to guarantee the opening and closing of valves is solved because some fire valves are installed outdoors, which cannot eliminate the risk of unauthorized personnel opening the valves.

[0024] The check plate 10 abuts against the water inlet 3. A sealing sleeve 17 is provided on the outer side of the sealing body 8, and the sealing sleeve 17 abuts against the inner wall of the main valve body 1. A positioning ring 18 is provided above the positioning rod 9. The sealing body 8 has a positioning groove 19, and the positioning ring 18 is located in the positioning groove 19. The check plate 10 abuts against the water inlet 3, ensuring that the water flow will not flow backward and controlling the water outflow. The sealing sleeve 17 improves the sealing performance of the sealing body 8 and reduces the possibility of water leakage. The cooperation between the positioning rod 9 and the positioning ring 18 makes the spring 11 stable during movement and not easy to deviate.

[0025] Secondly, the U-shaped plate 12 is located outside the threaded sleeve 4, the threaded sleeve 4 is located between the two limiting rods 13, and the U-shaped plate 12, the limiting plate 7, the threaded sleeve 4 and the two limiting rods 13 are all located inside the protective cover 14.

[0026] Furthermore, the backflow prevention fire valve also includes two outlet pipes 20 and an inlet pipe 21. Both the outlet pipes 20 and the inlet pipe 21 are equipped with flanges 22. The two outlet pipes 20 are respectively connected to the main valve body 1 and located at the corresponding outlet 2. The inlet pipe 21 is connected to the main valve body 1 and located at the inlet 3. The arrangement of the outlet pipes 20 and the inlet pipe 21 allows the valve to be easily connected to the fire pipeline system. The use of the flanges 22 facilitates the connection and disassembly of the pipelines and improves the ease of installation.

[0027] In addition, a limiting ring 23 is provided at the other end of the threaded sleeve 4, and a rotating groove 24 is provided at the top of the main valve body 1. A limiting groove 25 is provided on the inner side of the rotating groove 24, and the limiting ring 23 is located in the limiting groove 25. Through the cooperation of the limiting ring 23, the rotating groove 24 and the limiting groove 25, the threaded sleeve 4 is prevented from detaching from the main valve body 1.

[0028] Meanwhile, the inner side of the protective cover 14 is provided with multiple strip blocks 26, and the top outer side of the main valve body 1 has multiple strip grooves 27. The protective cover 14 is fixedly connected to the main valve body 1 by screws and covers the main valve body 1. The multiple limiting strips are located in the corresponding strip grooves 27. Through the cooperation of the strip blocks 26 and the strip grooves 27, not only is the connection strength between the protective cover 14 and the main valve body 1 enhanced, but the overall stability of the valve is also improved. At the same time, this design also makes the disassembly and installation of the protective cover 14 more convenient.

[0029] When using this utility model, an external motor drives the rotating shaft 15 clockwise. The rotating shaft 15 drives the driving gear 16 to mesh with the driven gear 5. The threaded sleeve 4 rotates under the action of the limiting ring 23 and the limiting groove 25, while the threaded sleeve 4 moves downward under the action of the limiting rod 13 and the limiting plate 7. The sealing body 8 pushes down the positioning rod 9, and the check plate 10 seals the water inlet 3 under the action of the spring 11. If it is necessary to open the valve, it is only necessary to use the electric motor... The machine rotates counterclockwise, and the check plate 10 slowly moves out of the inlet 3, thereby opening the valve. This design controls the opening and closing of the main valve body 1, preventing unauthorized personnel from opening and closing the main valve body 1. Only authorized personnel can operate the fire valve, avoiding potential safety risks caused by misoperation by non-professionals. This solves the technical problem that some fire valves are located outdoors, which cannot eliminate the risk of unauthorized personnel opening the valves, thus making it impossible to guarantee the opening and closing of the valves.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A fire-fighting valve with backflow prevention, characterized in that, The device includes a main valve body with outlets on both sides and an inlet at the bottom. A threaded sleeve is rotatably mounted on the top of the main valve body, with a driven gear at one end. A screw is threaded into the inner thread of the threaded sleeve, a limit plate is mounted above the screw, a sealing body is mounted below the screw, a positioning rod is slidably mounted below the sealing body, a check plate is mounted below the positioning rod, and a spring is welded between the check plate and the sealing body. A U-shaped plate, two limit rods, and a protective cover are mounted above the main valve body. A rotating shaft is rotatably mounted on the U-shaped plate, and a driving gear is mounted below the rotating shaft, meshing with the driven gear. The limit plate is sleeved on the two limit rods.

2. The backflow prevention fire valve as described in claim 1, characterized in that, The check plate abuts against the water inlet, a sealing sleeve is provided on the outside of the sealing body, and the sealing sleeve abuts against the inner wall of the main valve body. A positioning ring is provided above the positioning rod, and a positioning groove is provided in the sealing body, with the positioning ring located in the positioning groove.

3. The backflow prevention fire valve as described in claim 2, characterized in that, The U-shaped plate is located outside the threaded sleeve, the threaded sleeve is located between the two limiting rods, and the U-shaped plate, the limiting plate, the threaded sleeve and the two limiting rods are all located inside the protective cover.

4. The anti-backflow fire valve as described in claim 3, characterized in that, The backflow prevention fire valve also includes two outlet pipes and an inlet pipe. Both the outlet pipes and the inlet pipes are equipped with flanges. The two outlet pipes are respectively connected to the main valve body and located at the corresponding outlet. The inlet pipe is connected to the main valve body and located at the inlet.

5. The anti-backflow fire valve as described in claim 4, characterized in that, The other end of the threaded sleeve is provided with a limiting ring, the top of the main valve body has a rotating groove, the inner side of the rotating groove has a limiting groove, and the limiting ring is located in the limiting groove.

6. The anti-backflow fire valve as described in claim 5, characterized in that, The inner side of the protective cover is provided with multiple strip blocks, and the top outer side of the main valve body has multiple strip grooves. The protective cover is fixedly connected to the main valve body by screws and covers the main valve body, and multiple limiting strips are located in the corresponding strip grooves.

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