A two-stage pressure reducing fire protection pressure reducing valve

Abstract

The utility model provides a kind of two-stage pressure reducing type fire-fighting pressure reducing valve, including pressure reducing valve main body, the water inlet end of the pressure reducing valve main body is provided with filter shell, the water inlet end of the pressure reducing valve main body and the water outlet end of filter shell are connected with connecting pipe by flange, the downside sealing plug-in of filter shell inner wall is inserted with filter cartridge, the upper end of filter shell is provided with the sealing cover plate matched with it, the both sides of filter shell are fixedly connected with mounting block. By setting the structure that filter cartridge cooperates with filter shell, water flow enters filter shell and first flows through filter cartridge, filter cartridge can collect impurities such as silt, corrosion debris and the like in water, avoid impurities into the pressure reducing assembly inside the pressure reducing valve main body, improve the pressure out of control problem caused by impurity blockage orifice of traditional pressure reducing valve, reduce the abrasive damage of impurities to valve core sealing surface simultaneously, improve sealing leakage condition, prolong the service life of pressure reducing valve core component.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting pressure reducing valve technology, specifically a two-stage pressure reducing fire-fighting pressure reducing valve. Background Technology

[0002] Two-stage pressure-reducing fire-fighting pressure-reducing valves are core control components in fire protection systems for high-rise buildings and large complexes. Through a graded pressure-reducing structure of primary coarse pressure adjustment and secondary fine pressure adjustment, they stably reduce the high-pressure water source of the fire-fighting pipeline to the safe pressure range required by the end fire-fighting equipment (such as fire hydrants and sprinkler heads), ensuring that the water pressure and flow rate meet the requirements of fire protection codes during fire fighting. They are key equipment for ensuring the stability of fire-fighting water supply and fire-fighting efficiency.

[0003] However, during long-term operation, fire water often mixes with impurities such as silt, pipe corrosion debris, etc. These impurities can easily enter the interior of the two-stage pressure reducing fire valve with the water flow, seriously affecting the operation of the equipment. On the one hand, impurities can easily block the throttling orifice of the pressure reducing valve core, causing the pressure in the pressure reducing chamber to be unable to be released normally, resulting in a sudden increase in outlet pressure, and thus the risk of pipe bursting. On the other hand, impurities will adhere to the sealing surface of the valve core and valve seat, damaging the sealing performance and causing continuous leakage. At the same time, the grinding of the sealing surface by impurities will significantly shorten the service life of the valve core, increase the frequency of equipment maintenance, and increase the safety hazards of the fire protection system. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a two-stage pressure-reducing fire-fighting pressure-reducing valve to solve the problems mentioned in the background. This utility model has a novel structure. By setting a structure in which a filter cartridge and a filter shell cooperate, the water flows through the filter cartridge after entering the filter shell. The filter cartridge can collect impurities such as silt and rust debris in the water, preventing impurities from entering the pressure-reducing components inside the pressure-reducing valve body. This improves the pressure control problem caused by impurities clogging the throttling orifice in traditional pressure-reducing valves. At the same time, it reduces the abrasive damage of impurities to the valve core sealing surface, improves sealing and leakage, and extends the service life of the core components of the pressure-reducing valve.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a two-stage pressure-reducing fire-fighting pressure-reducing valve, comprising a pressure-reducing valve body, a filter shell provided on one side of the water inlet end of the pressure-reducing valve body, a connecting pipe connected between the water inlet end of the pressure-reducing valve body and the water outlet end of the filter shell via a flange, a filter cartridge sealed and inserted into the lower side of the inner wall of the filter shell, a sealing cover plate provided at the upper end of the filter shell to cooperate with it, mounting blocks fixedly connected to both sides of the filter shell, a rotating plate rotatably fitted on the upper side of the rear mounting block, and a threaded pressure rod threadedly fitted on the upper side of the rotating plate.

[0006] Furthermore, the movable end of the rotating plate is provided with a slot, and a limiting rod that cooperates with the slot is fixedly connected to the upper side of the front mounting block.

[0007] Furthermore, a sealing ring is provided at the upper end of the filter housing, and the two sides of the sealing ring are in contact with the filter housing and the sealing cover plate, respectively.

[0008] Furthermore, a pull ring is fixedly connected to the upper side of the filter cartridge.

[0009] Furthermore, positioning grooves are provided on opposite sides of both mounting blocks, and positioning blocks that cooperate with the positioning grooves are fixedly connected to both sides of the sealing cover.

[0010] Furthermore, a plug bolt is threaded onto one side of the lower part of the filter housing, and a fixing bracket is installed at the lower end of the filter housing.

[0011] Furthermore, a fixing bracket is fixedly connected to the inner wall of the connecting pipe, a spring is fixedly connected to one side of the fixing bracket, a conical head is fixedly connected to one end of the spring, and a mating ring block is installed on the inner wall of the connecting pipe near the conical head.

[0012] Furthermore, the conical surface of the conical head is clearance-fitted with the inner wall of the mating ring block.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model, by setting a structure in which the filter cartridge and the filter shell cooperate, allows water to flow through the filter cartridge first after entering the filter shell. The filter cartridge can collect impurities such as mud, sand, and rust debris in the water, preventing impurities from entering the pressure reducing components inside the pressure reducing valve body. This improves the pressure loss control problem caused by impurities clogging the throttling orifice in traditional pressure reducing valves, while also reducing the abrasive damage of impurities to the valve core sealing surface, improving sealing and leakage, and extending the service life of the core components of the pressure reducing valve.

[0015] 2. This utility model, through the structure of a sealing cover plate, a rotating plate and a threaded pressure rod, allows for quick disassembly and assembly of the sealing cover plate, facilitating the removal of the filter cartridge to clean the impurities collected inside. It eliminates the need for complicated operations, improves the problem of inconvenient maintenance of traditional filter structures, reduces the difficulty and frequency of equipment maintenance, and ensures continuous and stable filtration function. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a two-stage pressure-reducing fire-fighting pressure-reducing valve according to the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the connecting pipe of a two-stage pressure-reducing fire-fighting pressure-reducing valve according to this utility model;

[0018] Figure 3 This is a schematic diagram of the sealing cover plate installation structure of a two-stage pressure reducing fire-fighting pressure reducing valve according to this utility model;

[0019] Figure 4 This is a schematic diagram of the sealing cover separation structure of a two-stage pressure-reducing fire-fighting pressure-reducing valve according to the present invention;

[0020] Figure 5 This is a schematic cross-sectional view of the filter shell structure of a two-stage pressure-reducing fire-fighting pressure-reducing valve according to this utility model.

[0021] In the diagram: 1. Pressure reducing valve body; 2. Filter housing; 3. Connecting pipe; 4. Filter cartridge; 5. Sealing cover plate; 6. Mounting block; 7. Rotating plate; 8. Threaded pressure rod; 9. Slot; 10. Limiting rod; 11. Sealing ring; 12. Pull ring; 13. Positioning groove; 14. Positioning block; 15. Plug bolt; 16. Fixed bracket; 17. Fixed frame; 18. Spring; 19. Conical head; 20. Matching ring block. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please refer to Figures 1 to 5 This utility model provides a technical solution: a two-stage pressure-reducing fire-fighting pressure-reducing valve, including a pressure-reducing valve body 1, a filter shell 2 provided on one side of the water inlet end of the pressure-reducing valve body 1, a connecting pipe 3 connected between the water inlet end of the pressure-reducing valve body 1 and the water outlet end of the filter shell 2 via a flange, a filter cartridge 4 sealed and inserted into the lower side of the inner wall of the filter shell 2, a sealing cover plate 5 provided at the upper end of the filter shell 2, mounting blocks 6 fixedly connected to both sides of the filter shell 2, a rotating plate 7 rotatably fitted on the upper side of the rear mounting block 6, and a threaded pressure rod 8 threadedly fitted on the upper side of the rotating plate 7. A slot 9 is provided at the movable end of the rotating plate 7, and a limiting rod 10 that mates with the slot 9 is fixedly connected to the upper side of the front mounting block 6. After the water flows into the filter housing 2, it first flows into the filter cartridge 4. Impurities are intercepted and collected by the filter cartridge 4. The filtered water is discharged from the filter cartridge 4. The sealing cover 5 is precisely aligned with the positioning groove 13 through the positioning block 14. After the rotating plate 7 is flipped, the slot 9 is engaged with the limiting rod 10. Tightening the threaded pressure rod 8 can press the sealing cover 5 to achieve the sealing of the filter housing 2. This structure not only ensures the filtration effect, but also allows for quick disassembly and assembly of the cover, making it easy to clean impurities inside the filter cartridge 4 and preventing impurities from entering the pressure reducing valve body 1.

[0024] In this embodiment, a sealing ring 11 is provided at the upper end of the filter housing 2, and the two sides of the sealing ring 11 contact the filter housing 2 and the sealing cover plate 5 respectively. A pull ring 12 is fixedly connected to the upper side of the filter cartridge 4. Positioning grooves 13 are provided on opposite sides of the two mounting blocks 6, and positioning blocks 14 that cooperate with the positioning grooves 13 are fixedly connected to both sides of the sealing cover plate 5. A plug bolt 15 is threadedly fitted on one side of the filter housing 2, and a fixed bracket 16 is installed at the lower end of the filter housing 2. The sealing ring 11 further enhances the sealing performance between the filter housing 2 and the sealing cover plate 5, preventing water leakage during filtration. The pull ring 12 facilitates the lifting of the filter cartridge 4 for cleaning impurities. When it is necessary to drain the residual water in the filter housing 2, the plug bolt 15 can be unscrewed, which is convenient for maintenance. The fixed bracket 16 provides stable support for the filter housing 2, reduces shaking caused by water flow impact, and improves the overall structural stability.

[0025] In this embodiment, a fixing bracket 17 is fixedly connected to the inner wall of the connecting pipe 3. A spring 18 is fixedly connected to one side of the fixing bracket 17, and a conical head 19 is fixedly connected to one end of the spring 18. A mating ring block 20 is installed on the inner wall of the connecting pipe 3 near the conical head 19. The conical surface of the conical head 19 is in clearance fit with the inner wall of the mating ring block 20. When filtered water enters the connecting pipe 3, the spring 18 pushes the conical head 19 to form a gap with the mating ring block 20. When the water flows through the gap, the conical head 19 and the spring 18 cooperate to initially reduce the pressure on the water flow, reducing the initial pressure entering the pressure reducing valve body 1.

[0026] When using the device, water first enters the filter housing 2 and flows into the filter cartridge 4. Impurities are collected by the filter cartridge 4, and the filtered water is discharged from the filter cartridge 4. The sealing cover 5 is sealed and fixed by components such as the rotating plate 7 and the threaded pressure rod 8. The sealing ring 11 strengthens the seal. After the water enters the connecting pipe 3, the conical head 19 cooperates with the spring 18 to initially reduce the pressure, and then flows into the pressure reducing valve body 1. During maintenance, the filter cartridge 4 is removed by pulling the ring 12 to clean the impurities, and the plug bolt 15 is unscrewed to drain the residual water in the filter housing 2. This process realizes filtration, initial pressure reduction and convenient maintenance, and ensures the stable operation of the two-stage pressure reducing component.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A two-stage pressure reducing fire protection pressure reducing valve comprising a pressure reducing valve body (1), characterized in that: A filter shell (2) is provided on one side of the water inlet end of the pressure reducing valve body (1). A connecting pipe (3) is connected between the water inlet end of the pressure reducing valve body (1) and the water outlet end of the filter shell (2) through a flange. A filter cylinder (4) is sealed and inserted into the lower side of the inner wall of the filter shell (2). A sealing cover plate (5) is provided at the upper end of the filter shell (2) to cooperate with it. Mounting blocks (6) are fixedly connected to both sides of the filter shell (2). A rotating plate (7) is rotatably fitted on the upper side of the mounting block (6) on the rear side. A threaded pressure rod (8) is threadedly fitted on the upper side of the rotating plate (7).

2. A two-stage reducing fire control pressure reducing valve according to claim 1, characterized in that: The movable end of the rotating plate (7) is provided with a slot (9), and the upper side of the front mounting block (6) is fixedly connected with a limiting rod (10) that cooperates with the slot (9).

3. The two-stage pressure-reducing fire-fighting pressure-reducing valve according to claim 1, characterized in that: The upper end of the filter shell (2) is provided with a sealing ring (11), and the two sides of the sealing ring (11) are in contact with the filter shell (2) and the sealing cover plate (5) respectively.

4. A two-stage pressure-reducing fire-fighting pressure-reducing valve according to claim 1, characterized in that: A pull ring (12) is fixedly connected to the upper side of the filter cartridge (4).

5. A two-stage pressure-reducing fire-fighting pressure-reducing valve according to claim 1, characterized in that: Positioning grooves (13) are provided on one side of each of the two mounting blocks (6), and positioning blocks (14) that cooperate with the positioning grooves (13) are fixedly connected to both sides of the sealing cover plate (5).

6. A two-stage pressure-reducing fire-fighting pressure-reducing valve according to claim 1, characterized in that: A plug bolt (15) is threaded on one side of the filter housing (2), and a fixing bracket (16) is installed at the lower end of the filter housing (2).

7. A two-stage pressure-reducing fire-fighting pressure-reducing valve according to claim 1, characterized in that: A fixing bracket (17) is fixedly connected to the inner wall of the connecting pipe (3). A spring (18) is fixedly connected to one side of the fixing bracket (17). A conical head (19) is fixedly connected to one end of the spring (18). A mating ring block (20) is installed on the inner wall of the connecting pipe (3) near the conical head (19).

8. A two-stage pressure-reducing fire-fighting pressure-reducing valve according to claim 7, characterized in that: The conical surface of the conical head (19) is clearance-fitted with the inner wall of the mating ring block (20).

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