Wet alarm valve with overpressure protection device

Abstract

The utility model discloses a wet alarm valve with an overpressure protection device, which comprises a valve body, the top of the valve body is fixedly connected with a first flange plate, the bottom of the valve body is fixedly connected with a second flange plate, the top of the right side of the valve body is communicated with a first connecting pipe, and the top of the first connecting pipe is communicated with a system side pressure gauge. The bottom of the right side of the valve body communicates with a second connecting pipe. The valve is opened, a worker rotates the blow-off pipe, the blow-off pipe drives the filter cover to rotate, and the surface of the filter cover rubs with the inner wall of the filter, so that impurities on the surface of the filter cover can be cleaned and discharged through the blow-off pipe along with water flow, and the cleaning efficiency of the impurities in the filter can be effectively improved; and the problems that in the cleaning process of a traditional alarm valve, dismounting and cleaning need to be conducted, subsequent maintenance work of the alarm valve is inconvenient, and then the using effect of the device is reduced are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wet alarm valves, in particular to a wet alarm valve with an overpressure protection device. Background Art

[0002] A wet alarm valve is a one-way valve that only allows water to flow into the sprinkler system in one direction and alarms at a specified flow rate. Normally, the water pressure before and after the valve disc of the wet alarm valve is equal. An overpressure protection mechanism is often set inside the wet alarm valve to improve the safety of the valve body. The delay device in the wet alarm valve acts as a buffer to prevent false alarms. When the alarm water pressure is generated, the water pressure first accumulates in the delay device. When the water flow in the delay device is full and enters the fire alarm, an alarm will occur. This can avoid the probability of false alarms of the wet alarm valve when the water supply pressure is unstable.

[0003] For example, the Chinese utility model provides "a wet alarm valve with an overpressure protection mechanism", and its announcement number is: CN216743113U, which includes a wet alarm valve, one side surface position of the wet alarm valve is fixedly connected with a system side pressure gauge and a water supply side pressure gauge, a compensator is provided between the system side pressure gauge and the water supply side pressure gauge, the other side surface position of the wet alarm valve is fixedly connected with a delay device, the top of the delay device is fixedly connected with a pressure switch and a fire alarm, and the interior of the delay device is fixedly installed with water-blocking sealing baffles near the upper and lower surfaces respectively. The utility model provides a wet alarm valve with an overpressure protection mechanism, which has the function of precise adjustment of the inner cavity volume of the delay device, and can drive the movable blocking plate to move through the spiral drive structure, thereby changing the internal volume of the delay device, and increasing the volume of the delay device in an unstable pressure water supply environment, thereby greatly reducing the probability of false alarm of the wet alarm valve.

[0004] In the process of realizing the present utility model, the inventors found that there are at least the following problems in this technology. During the use of the wet alarm valve in the above patent, in order to prevent the alarm device from being blocked by debris in the water, there is often a filter in the pipe leading to the alarm device. However, in the process of cleaning the filter, it is necessary to disassemble and clean it, which makes the subsequent maintenance of the alarm valve more inconvenient, thereby reducing the use effect of the device. For this reason, we propose a wet alarm valve with an overpressure protection device. Utility Model Content

[0005] The purpose of the utility model is to provide a wet alarm valve with an overpressure protection device, which has the advantage of convenient cleaning of impurities and solves the problem that the alarm valve needs to be disassembled and cleaned during cleaning, which makes the subsequent maintenance of the alarm valve more inconvenient and reduces the use effect of the device.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a wet alarm valve with an overpressure protection device, comprising a valve body, a first flange fixedly connected to the top of the valve body, a second flange fixedly connected to the bottom of the valve body, a first connecting pipe connected to the top of the right side of the valve body, a system-side pressure gauge connected to the top of the first connecting pipe, a second connecting pipe connected to the top of the second connecting pipe connected to the water supply-side pressure gauge, a third connecting pipe connected to the bottom of the left side of the valve body, a filter connected to the left side of the third connecting pipe, a fourth connecting pipe connected to the top of the filter, a pressure switch connected to the right side of the fourth connecting pipe, a hydraulic alarm connected to the left side of the fourth connecting pipe, a drain pipe connected to the top of the left side of the valve body, an overpressure control valve fixedly connected to one side of the drain pipe, a mounting bracket fixedly connected to the top and bottom of the filter cavity, a filter cover movably connected to the inner cavity of the mounting bracket, a drain pipe connected to the bottom of the filter cover, and a bottom of the drain pipe extending to the outside of the filter.

[0007] Preferably, a valve is fixedly connected to the surface of the sewage pipe, and the valve is a manual valve.

[0008] Preferably, an inspection plate is provided on the surface of the valve body, and fasteners are provided at the four corners of the surface of the inspection plate.

[0009] Preferably, a first mounting hole is formed on the top of the first flange, and a second mounting hole is formed on the top of the second flange.

[0010] Preferably, the filter cover is a cylindrical structure, and the material of the filter cover is a metal mesh.

[0011] Preferably, a sealing gasket is fixedly connected to the bottom of the filter cavity, and the sealing gasket is sleeved on the surface of the sewage pipe.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The utility model opens the valve, and the staff rotates the sewage pipe, which drives the filter cover to rotate. The surface of the filter cover rubs against the inner wall of the filter, thereby cleaning the impurities on the surface of the filter cover and discharging them through the sewage pipe with the water flow, thereby effectively improving the cleaning efficiency of the impurities inside the filter, and effectively solving the problem that the traditional alarm valve needs to be disassembled and cleaned during cleaning, which makes the subsequent maintenance of the alarm valve more inconvenient, thereby reducing the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2This is a schematic cross-sectional view of the internal structure of the filter of the present invention;

[0016] Figure 3 It is a schematic diagram of the main view of the structure of the present utility model.

[0017] In the figure: 1. Valve body; 2. First flange; 3. Second flange; 4. First connecting pipe; 5. System side pressure gauge; 6. Second connecting pipe; 7. Water supply side pressure gauge; 8. Third connecting pipe; 9. Filter; 10. Fourth connecting pipe; 11. Pressure switch; 12. Hydraulic alarm; 13. Drain pipe; 14. Overpressure control valve; 15. Mounting bracket; 16. Filter cover; 17. Drain pipe; 18. Valve; 19. Inspection panel; 20. Sealing gasket. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-3, a wet alarm valve with an overpressure protection device, comprising a valve body 1, a first flange 2 fixedly connected to the top of the valve body 1, a second flange 3 fixedly connected to the bottom of the valve body 1, a first connecting pipe 4 connected to the top of the right side of the valve body 1, a system-side pressure gauge 5 connected to the top of the first connecting pipe 4, a second connecting pipe 6 connected to the bottom of the right side of the valve body 1, a water supply-side pressure gauge 7 connected to the top of the second connecting pipe 6, a third connecting pipe 8 connected to the bottom of the left side of the valve body 1, a filter 9 connected to the left side of the third connecting pipe 8, a fourth connecting pipe 10 connected to the top of the filter 9, a pressure switch 11 connected to the right side of the fourth connecting pipe 10, a hydraulic alarm 12 connected to the left side of the fourth connecting pipe 10, a drain pipe 13 connected to the top of the left side of the valve body 1, and one side of the drain pipe 13 is fixedly connected to an overpressure Control valve 14, the top and bottom of the inner cavity of filter 9 are fixedly connected with mounting bracket 15, the inner cavity of mounting bracket 15 is movably connected with filter cover 16, the bottom of filter cover 16 is connected with drain pipe 17, the bottom of drain pipe 17 passes through the outside of filter 9, by opening valve 18, the staff rotates drain pipe 17, drain pipe 17 drives filter cover 16 to rotate, the surface of filter cover 16 rubs with the inner wall of filter 9, so that impurities on the surface of filter cover 16 can be cleaned and discharged through drain pipe 17 with water flow, thereby effectively improving the cleaning efficiency of impurities inside filter 9, and effectively solving the problem that traditional alarm valve needs to be disassembled and cleaned during cleaning, which makes subsequent maintenance of alarm valve inconvenient, thereby reducing the use effect of the device.

[0020] A valve 18 is fixedly connected to the surface of the sewage pipe 17, and the valve 18 is a manual valve.

[0021] Through the above technical solution, by providing the valve 18, the sewage pipe 17 can be closed, thereby achieving the effect of facilitating cleaning.

[0022] An inspection plate 19 is provided on the surface of the valve body 1 , and fasteners are provided at the four corners of the surface of the inspection plate 19 .

[0023] Through the above technical solution, by providing the inspection plate 19 and the fasteners, the internal structure of the valve body 1 can be inspected, thereby facilitating subsequent maintenance work.

[0024] A first mounting hole is formed on the top of the first flange 2 , and a second mounting hole is formed on the top of the second flange 3 .

[0025] Through the above technical solution, by providing the first mounting hole and the second mounting hole, the first flange 2 and the second flange 3 can be installed, thereby achieving the effect of installing the alarm valve.

[0026] The filter cover 16 is a cylindrical structure, and the material of the filter cover 16 is a metal mesh.

[0027] Through the above technical solution, by setting the filter cover 16, the filter cover 16 is a metal mesh tube structure, which can improve the impurity filtering effect.

[0028] A sealing gasket 20 is fixedly connected to the bottom of the inner cavity of the filter 9 , and the sealing gasket 20 is sleeved on the surface of the sewage pipe 17 .

[0029] According to the above technical solution, by providing the sealing gasket 20 , the sealing performance inside the filter 9 can be improved.

[0030] During use, by opening the valve 18, the staff rotates the drain pipe 17, and the drain pipe 17 drives the filter cover 16 to rotate. The surface of the filter cover 16 rubs against the inner wall of the filter 9, thereby cleaning the impurities on the surface of the filter cover 16 and discharging them through the drain pipe 17 along with the water flow, thereby effectively improving the cleaning efficiency of the impurities inside the filter 9.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wet alarm valve with an overpressure protection device, comprising a valve body (1), characterized in that: The top of the valve body (1) is fixedly connected to a first flange (2), the bottom of the valve body (1) is fixedly connected to a second flange (3), the top of the right side of the valve body (1) is connected to a first connecting pipe (4), the top of the first connecting pipe (4) is connected to a system side pressure gauge (5), the bottom of the right side of the valve body (1) is connected to a second connecting pipe (6), the top of the second connecting pipe (6) is connected to a water supply side pressure gauge (7), the bottom of the left side of the valve body (1) is connected to a third connecting pipe (8), the left side of the third connecting pipe (8) is connected to a filter (9), the top of the filter (9) is connected to a fourth connecting pipe (8). The fourth connecting pipe (10) is connected to the right side of the fourth connecting pipe (10), and the fourth connecting pipe (10) is connected to the left side of the fourth connecting pipe (10). The top of the left side of the valve body (1) is connected to a drain pipe (13), and one side of the drain pipe (13) is fixedly connected to an overpressure control valve (14). The top and bottom of the inner cavity of the filter (9) are fixedly connected to a mounting bracket (15), and the inner cavity of the mounting bracket (15) is movably connected to a filter cover (16). The bottom of the filter cover (16) is connected to a sewage pipe (17), and the bottom of the sewage pipe (17) passes through the outside of the filter (9).

2. A wet alarm valve with an overpressure protection device according to claim 1, characterized in that: A valve (18) is fixedly connected to the surface of the sewage pipe (17), and the valve (18) is a manual valve.

3. The wet alarm valve with an overpressure protection device according to claim 1, characterized in that: An inspection plate (19) is provided on the surface of the valve body (1), and fasteners are provided at the four corners of the surface of the inspection plate (19).

4. The wet alarm valve with an overpressure protection device according to claim 1, characterized in that: A first mounting hole is provided on the top of the first flange (2), and a second mounting hole is provided on the top of the second flange (3).

5. The wet alarm valve with an overpressure protection device according to claim 1, characterized in that: The filter cover (16) is a cylindrical structure, and the material of the filter cover (16) is a metal mesh.

6. The wet alarm valve with an overpressure protection device according to claim 1, characterized in that: A sealing gasket (20) is fixedly connected to the bottom of the inner cavity of the filter (9), and the sealing gasket (20) is sleeved on the surface of the sewage pipe (17).

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