Wet alarm valve for fire safety

Abstract

The utility model relates to the technical field of alarm valves, in particular to a wet alarm valve for fire safety, which comprises a valve body, a drainage valve is fixedly communicated with the right side of the valve body, a water pouring pipe is fixedly communicated with the right side of the valve body and positioned on the lower side of the drainage valve, and a drainage head is arranged on one side of the water pouring pipe. And a filtering mechanism for filtering water is arranged between the water pouring pipe and the drainage head. According to the wet alarm valve for fire safety, the design of the shell assembly facilitates the disassembly of the whole filter shell, so that maintenance personnel can easily clean and inspect the filter mechanism, the design of the cleaning assembly enables the cleaning work of the filter screen to be more efficient, the maintenance time is shortened, and the maintenance efficiency is improved. Compared with the prior art that the filter screen can be cleaned only by detaching the filter shell, the design reduces the detaching steps, simplifies the cleaning process, and can prolong the service life of the filter screen and reduce the replacement frequency through rapid and effective cleaning, thereby reducing the long-term operation cost.

Description

Technical Field

[0001] The utility model relates to the technical field of alarm valves, in particular to a wet alarm valve for fire safety. Background Art

[0002] In the fire protection system, the wet alarm valve is a one-way valve that only allows water to flow into the sprinkler system in one direction and alarms when the specified flow rate is exceeded. Under normal circumstances, the valve disc is in a closed state due to its own weight and the water pressure before and after the valve disc. When a fire occurs, the closed sprinkler sprays water, and the water pressure above the alarm valve drops. At this time, the water pressure before the valve disc is greater than the water pressure behind the valve disc, so the valve disc opens, and the system side, and at the same time, water enters the delay device and the alarm system along the annular groove of the alarm valve, sending out a fire alarm signal.

[0003] Chinese patent CN219774802U discloses a wet alarm valve for fire safety, including a wet alarm valve body, a wet alarm valve flap assembly is arranged in the wet alarm valve body, the wet alarm valve flap assembly divides the wet alarm valve body into an upper cavity and a lower cavity, the upper cavity is connected to the system side, and the lower cavity is connected to the water supply side, the wet alarm valve flap assembly includes a first limit ring integrally formed on the inner wall of the wet alarm valve body, a valve stem, a first plug fixed to the bottom of the valve stem and matched with the first limit ring, and an integrally formed The second limit ring on the inner wall of the alarm valve body, the utility model has a simple structure, and there is no need to install a pressure gauge in the upper chamber and the lower chamber respectively. The pressure gauge is used to calculate the pressure difference to control the alarm valve to alarm. When the valve stem moves, the travel switch of the alarm valve is triggered to realize the alarm. The structure is simple and the cost is reduced while completing the same function. The above application does not have an alarm valve with a quick filter cleaning function. After the filter is blocked, the filter housing needs to be disassembled before the debris on the filter can be cleaned. The disassembly steps are cumbersome, which reduces the cleaning efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a wet alarm valve for fire safety, which has the advantages of easy cleaning and maintenance of the filter screen, and solves the problem that after the filter screen is clogged, the filter housing needs to be disassembled before debris on the filter screen can be cleaned, and the disassembly steps are cumbersome, which reduces the cleaning efficiency.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wet alarm valve for fire safety, comprising a valve body, a drain valve is connected and fixed to the right side of the valve body, a water pouring pipe is connected and fixed to the right side of the valve body and located below the drain valve, a drain head is arranged on one side of the water pouring pipe, and a filtering mechanism for filtering water is arranged between the water pouring pipe and the drain head;

[0006] The filter mechanism is provided with a filter net for filtering water inside, and the filter mechanism includes a housing component and a cleaning component, the housing component is convenient for disassembly and cleaning of the entire filter housing, the cleaning component is used to clean the filter net, and the cleaning component is provided on the housing component;

[0007] The shell assembly includes a left shell, a right shell, a positioning ring, a fixing plate, a rubber ring, and a rotating rod. The right side of the left shell is fixed to the positioning ring, and the rubber ring is fixed to the left side of the right shell. A sealing groove matching the size of the rubber ring is provided on the right side of the positioning ring. The positioning ring is fixed to the fixing plate by four bolts. The rotating rod is rotatably connected to the right side of the right shell through a bearing, and the left end thereof penetrates and extends into the left shell and the right shell.

[0008] Furthermore, the right sides of the positioning ring and the fixing plate are both provided with equal-sized and circular flow openings, and the filter screen is fixed inside the left shell body.

[0009] Furthermore, the left shell and the right shell are both in the shape of a hollow cylinder, and the outer diameter of the positioning ring is greater than the outer diameter of the fixing plate.

[0010] Furthermore, the cleaning assembly includes a turntable, a grip rod, a connecting rod and a cleaning sheet, the turntable is fixed to the outside of the turntable, the grip rod is fixed to the turntable, the connecting rod is located in the right shell and fixed to the turntable, and the other end of the connecting rod is fixed to the cleaning sheet.

[0011] Furthermore, the number of the gripping rod, the connecting rod and the cleaning sheet are three, the three gripping rods are equidistantly distributed on the outside of the turntable, and the other end of the rotating rod is rotatably connected to the drainage head via a sealed bearing.

[0012] Furthermore, a time delay device is connected and fixed to one end of the drainage head, a hydraulic alarm is fixed to one end of the time delay device, and a water inlet pressure gauge and a water outlet pressure gauge are connected to the left side of the valve body.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The fire safety wet alarm valve has a shell component design that facilitates the disassembly of the entire filter shell, allowing maintenance personnel to easily clean and inspect the filter mechanism. The design of the cleaning component makes the cleaning of the filter more efficient and reduces maintenance time. Compared with the existing technology that requires disassembly of the filter shell to clean the filter, this design reduces the disassembly steps and simplifies the cleaning process. Through quick and effective cleaning, the service life of the filter can be extended and the replacement frequency can be reduced, thereby reducing long-term operating costs. By keeping the filter clean, the performance of the alarm valve can be guaranteed to ensure that the alarm can be sounded in time in emergency situations such as fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the housing assembly of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the cleaning component of the utility model;

[0018] Figure 4 It is a schematic diagram of the local structure of the cleaning component of the utility model.

[0019] In the figure: 1 valve body, 2 drain valve, 3 drain pipe, 4 drain head, 5 filter mechanism, 50 filter screen, 51 shell assembly, 511 left shell, 512 right shell, 513 positioning ring, 514 fixing plate, 515 rubber ring, 516 rotating rod, 52 cleaning assembly, 521 turntable, 522 grip rod, 523 connecting rod, 524 cleaning sheet, 6 delay device, 7 hydraulic alarm, 8 water inlet pressure gauge, 9 water outlet pressure gauge. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 In this embodiment, a fire safety wet alarm valve comprises a valve body 1, a drain valve 2 is connected and fixed to the right side of the valve body 1, a water pouring pipe 3 is connected and fixed to the right side of the valve body 1 and located below the drain valve 2, a drain head 4 is arranged on one side of the water pouring pipe 3, and a filter mechanism 5 for filtering water is arranged between the water pouring pipe 3 and the drain head 4;

[0022] The filter mechanism 5 has a filter screen 50 for filtering moisture inside, and includes a shell assembly 51 and a cleaning assembly 52. ​​The shell assembly 51 facilitates the disassembly and cleaning of the entire filter shell, and the cleaning assembly 52 is used to clean the filter screen 50. The cleaning assembly 52 is arranged on the shell assembly 51.

[0023] It should be noted that the cleaning assembly 52 is specifically used to clean the filter 50. The cleaning assembly 52 includes a rotating disk 521, a gripping rod 522, a connecting rod 523, and a cleaning sheet 524. The rotating disk 521 is fixed to the outside of the rotating rod 516, the gripping rod 522 is fixed to the rotating disk 521, the connecting rod 523 is located in the right housing 512 and is fixed to the rotating rod 516, and the other end of the connecting rod 523 is fixed to the cleaning sheet 524. The design of the cleaning assembly 52 allows maintenance personnel to easily clean the filter 50 to maintain the filtering efficiency.

[0024] The shell assembly 51 includes a left shell 511, a right shell 512, a positioning ring 513, a fixing plate 514, a rubber ring 515, and a rotating rod 516. The right side of the left shell 511 is fixed to the positioning ring 513, and the rubber ring 515 is fixed to the left side of the right shell 512. A sealing groove matching the size of the rubber ring 515 is provided on the right side of the positioning ring 513. The positioning ring 513 is fixed to the fixing plate 514 by four bolts. The rotating rod 516 is rotatably connected to the right side of the right shell 512 through a bearing, and the left end thereof penetrates and extends into the left shell 511 and the right shell 512.

[0025] The right sides of the positioning ring 513 and the fixing plate 514 are both provided with equal-sized circular flow openings, and the filter screen 50 is fixed inside the left housing 511 .

[0026] It should be noted that the filter 50 is fixed inside the left shell 511, and the shell assembly 51 is designed to be easy to disassemble, so that maintenance personnel can easily disassemble the shell assembly 51 to clean or replace the filter 50 to maintain the filtering efficiency.

[0027] The left shell 511 and the right shell 512 are both shaped like hollow cylinders, and the outer diameter of the positioning ring 513 is greater than the outer diameter of the fixing plate 514 .

[0028] It should be noted that these two components constitute the main body of the filter mechanism 5, and their shape is a hollow cylinder. This design allows the housing to have enough space to accommodate the filter screen 50 and other components while maintaining the integrity and stability of the structure.

[0029] Among them, the cleaning component 52 includes a turntable 521, a grip rod 522, a connecting rod 523 and a cleaning sheet 524. The turntable 521 is fixed to the outside of the rotating rod 516, the grip rod 522 is fixed to the turntable 521, the connecting rod 523 is located in the right shell 512 and is fixed to the rotating rod 516, and the other end of the connecting rod 523 is fixed to the cleaning sheet 524.

[0030] It should be noted that the design of the cleaning assembly 52 allows multiple cleaning sheets 524 to work simultaneously, thereby improving the cleaning efficiency. The number of the gripping rods 522, the connecting rods 523 and the cleaning sheets 524 are all three, and the gripping rods 522 are equidistantly distributed on the outside of the rotating disk 521, which means that the filter 50 can be cleaned from multiple angles at the same time.

[0031] There are three gripping rods 522 , three connecting rods 523 and three cleaning sheets 524 . The three gripping rods 522 are evenly distributed on the outside of the rotating disk 521 . The other end of the rotating rod 516 is rotatably connected to the drainage head 4 via a sealed bearing.

[0032] It should be noted that the cleaning assembly 52 not only improves the cleaning efficiency of the filter 50, but also reduces the difficulty of maintenance by simplifying the operation, thereby improving the maintainability and reliability of the entire alarm valve.

[0033] Among them, one end of the drainage head 4 is connected to and fixed with a delay device 6, one end of the delay device 6 is fixed with a hydraulic alarm 7, and the left side of the valve body 1 is connected to a water inlet pressure gauge 8 and a water outlet pressure gauge 9.

[0034] It should be noted that when a fire occurs, the closed sprinkler sprays water, causing the water pressure above the alarm valve to drop, the valve flap opens, and the water flows through the drain head 4 into the delay device 6. After the delay device 6 ensures that the water flow is stable, it triggers the hydraulic alarm 7 to sound an alarm.

[0035] The working principle of the above embodiment is as follows: in the absence of a fire, the alarm valve is in a closed state. The valve disc in the valve body 1 remains closed due to its own weight and the front and rear water pressure difference, preventing water from flowing to the water spray system. On the right side of the alarm valve, the drain valve 2 and the water pouring pipe 3 are used in conjunction to discharge the water in the system when needed. One end of the drain head 4 is connected to the timer 6, and the other end is discharged through the filter mechanism 5. The filter 50 inside the filter mechanism 5 can filter out impurities in the discharged water. When cleaning, the handle 522 on the outside of the rotating disk 521 is rotated with the connecting rod 523 and the cleaning sheet 524. At this time, the cleaning sheet 524 moves on the filter 50 to further clean the filter 50 and avoid clogging of the filter 50. When the filter 50 needs to be maintained or the entire device is transported, the four bolts can be unscrewed to separate the left shell 511 from the right shell 512. The entire device is divided into two parts, which is not only convenient for transportation, but also conducive to the maintenance of the filter 50.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A wet alarm valve for fire safety, comprising a valve body (1), characterized in that: The right side of the valve body (1) is connected to and fixed with a drain valve (2); the right side of the valve body (1) and located below the drain valve (2) is connected to and fixed with a water pouring pipe (3); a drain head (4) is provided on one side of the water pouring pipe (3); and a filtering mechanism (5) for filtering water is provided between the water pouring pipe (3) and the drain head (4); A filter screen (50) for filtering water is arranged inside the filter mechanism (5), and the filter mechanism (5) comprises a housing component (51) and a cleaning component (52), wherein the housing component (51) facilitates the disassembly and cleaning of the entire filter housing, and the cleaning component (52) is used to clean the filter screen (50), and the cleaning component (52) is arranged on the housing component (51); The housing assembly (51) comprises a left housing (511), a right housing (512), a positioning ring (513), a fixing plate (514), a rubber ring (515), and a rotating rod (516). The right side of the left housing (511) is fixed to the positioning ring (513), the rubber ring (515) is fixed to the left side of the right housing (512), a sealing groove matching the size of the rubber ring (515) is provided on the right side of the positioning ring (513), the positioning ring (513) and the fixing plate (514) are fixed via four bolts, and the rotating rod (516) is rotatably connected to the right side of the right housing (512) via a bearing, and the left end of the rotating rod (516) penetrates and extends into the left housing (511) and the right housing (512).

2. A fire safety wet alarm valve according to claim 1, characterized in that: The right sides of the positioning ring (513) and the fixing plate (514) are both provided with equal-sized circular flow openings, and the filter screen (50) is fixed inside the left shell body (511).

3. A fire safety wet alarm valve according to claim 1, characterized in that: The left shell (511) and the right shell (512) are both in the shape of a hollow cylinder, and the outer diameter of the positioning ring (513) is greater than the outer diameter of the fixing plate (514).

4. A fire safety wet alarm valve according to claim 1, characterized in that: The cleaning assembly (52) comprises a rotating disk (521), a gripping rod (522), a connecting rod (523) and a cleaning sheet (524); the rotating disk (521) is fixed to the outside of the rotating rod (516); the gripping rod (522) is fixed to the rotating disk (521); the connecting rod (523) is located in the right housing (512) and is fixed to the rotating rod (516); and the other end of the connecting rod (523) is fixed to the cleaning sheet (524).

5. A fire safety wet alarm valve according to claim 4, characterized in that: The number of the gripping rod (522), the connecting rod (523) and the cleaning sheet (524) is three, and the three gripping rods (522) are equidistantly distributed on the outside of the rotating disk (521). The other end of the rotating rod (516) is rotatably connected to the drainage head (4) via a sealed bearing.

6. A fire safety wet alarm valve according to claim 1, characterized in that: One end of the drainage head (4) is connected to and fixed with a time delay device (6), one end of the time delay device (6) is fixed with a hydraulic alarm (7), and the left side of the valve body (1) is connected to a water inlet pressure gauge (8) and a water outlet pressure gauge (9).

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