Pre-acting device convenient to install

Abstract

The utility model discloses a pre-acting device convenient to install, which belongs to the technical field of pre-acting valves, and comprises a valve body, a pre-acting valve group and a one-way valve group, the one-way valve group and the pre-acting valve group are respectively arranged at the upper end and the lower end of the valve body, and the pre-acting valve group comprises a diaphragm sealing gasket, a first elastic reset piece and a pre-acting valve cover. A pre-acting valve port is formed in the front wall of the lower end of the valve body, the pre-acting valve deck is arranged on the outer side of the pre-acting valve port, the diaphragm sealing gasket is arranged on the inner side of the pre-acting valve port, the first elastic reset piece is arranged between the diaphragm sealing gasket and the pre-acting valve deck, the valve body is provided with an air inlet pipeline, and an electromagnetic valve set is arranged on the air inlet pipeline. According to the pre-acting device, the one-way valve set and the pre-acting valve set are directly arranged in the valve body, so that the pre-acting device is more compact in structure and more convenient to install and maintain, the situation that the valve body and the one-way valve set need to be installed separately during installation is avoided, and the installation and maintenance cost and time are reduced.

Description

Technical Field

[0001] The utility model discloses a pre-action device which is easy to install and belongs to the technical field of pre-action valves. Background Art

[0002] The automatic sprinkler fire extinguishing system is the most widely used automatic fire extinguishing facility in the world today. Years of practice at home and abroad have proved that the system has the advantages of safety, reliability, economy, practicality and high fire extinguishing efficiency. According to the different ambient temperature and site characteristics, the automatic sprinkler fire extinguishing system is divided into many forms. The pre-action system is one of them. In the servo state, the system side pipe network is filled with low-pressure gas to detect the sealing of the pipe network. When a fire occurs in the protected area, the fire alarm system will start the pre-action system to allow fire water to enter the system pipe network and the gas to be discharged. When the fire develops to the point where the sprinkler nozzle is activated, the fire water is sprayed out to extinguish the fire. If the system nozzle malfunctions when there is no fire, the gas leaks, the system will not start and issue a low-pressure alarm to remind personnel to inspect. The pre-action system has the advantage of preventing accidental spraying. At the same time, the system side pipe network is not filled with water in the servo state, which can effectively prevent the fire water from freezing and causing system failure when the application site is low temperature. It is mainly used in places where accidental spraying will cause large losses or may freeze.

[0003] At present, when the existing pre-action alarm valve leaves the factory, the deluge alarm valve and the one-way valve are mostly separated and then assembled in series at the construction site. However, the connection method of fixing with flanges and bolts is cumbersome to operate, and cannot achieve rapid positioning and assembly, which is time-consuming and labor-intensive.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned problem and provide a pre-action device which is easy to install and has the effect of quick installation.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme, including a valve body, a pre-action valve group, a hydraulic alarm device, a pressure relief valve group and a one-way valve group, the one-way valve group and the pre-action valve group are respectively arranged at the upper and lower ends of the valve body, the valve body is provided with a water supply side channel at the lower side of the pre-action valve group, the valve body is provided with a system side channel at the upper end of the one-way valve group, a connecting channel is provided between the pre-action valve group and the one-way valve group, the pre-action valve group includes a diaphragm sealing gasket, a first elastic reset member and a pre-action valve cover, a pre-action valve port is provided on the front wall of the lower end of the valve body, the pre-action valve cover is arranged on the outside of the pre-action valve port, the diaphragm sealing gasket is arranged on the inside of the pre-action valve port and forms a valve group control chamber with the pre-action valve cover, the first elastic reset member is arranged on the diaphragm The air intake duct is connected to the air intake duct of the valve group control chamber by a solenoid valve group, and the air intake duct is connected to the air intake duct of the air intake duct and the air intake duct of the air intake duct. The one-way valve group includes an upper one-way valve plate, a lower one-way valve plate, a valve core and a second elastic reset member. The upper one-way valve plate and the lower one-way valve plate are arranged at the upper end of the valve body and the upper one-way valve plate is arranged on the upper side of the lower one-way valve plate. The upper one-way valve plate and the lower one-way valve plate are respectively provided with an upper one-way valve hole and a lower one-way valve hole. The valve core and the second elastic reset member are arranged between the upper one-way valve plate and the lower one-way valve plate. The upper and lower ends of the second elastic reset member are respectively abutted against the upper one-way valve plate and the valve core and can push the valve core to move downward to close the lower one-way valve hole.

[0007] By adopting the above technical solution, the lower end of the valve body is connected to the fire water inlet pipe, and the upper end is connected to the fire pipeline. The water source enters the valve body from the water supply side channel at the lower end of the valve body, and flows into the fire pipeline from the water supply side channel after passing through the connecting channel. The gas enters the valve group control chamber through the air intake pipe from the solenoid valve group, so that the diaphragm sealing gasket swells and closes the connecting channel under the action of air pressure and the first elastic reset member, thereby blocking the connection between the water supply side channel and the system side channel, so that the water source cannot enter the fire pipeline. After the control chamber of the valve group is filled with gas, the gas passes through the inflation pipe, is filled into the system side channel from the control chamber of the valve group, and finally enters the fire pipeline, so that the fire pipeline When converted from wet type to dry type, the valve core can keep the lower one-way valve hole in a normally closed state under the action of the second elastic return member, and the force applied to the valve core by the second elastic return member is from top to bottom, so that the one-way valve group allows the medium to flow only from bottom to top, so that the gas entering the system side channel will not flow back into the connecting channel to squeeze the diaphragm sealing gasket, affecting the sealing effect of the diaphragm sealing gasket on the connecting channel. By directly arranging the one-way valve group and the pre-action valve group directly inside the valve body, not only the overall structure of the valve body is optimized, but also the installation of the valve body is more convenient. There is no need to install the one-way valve separately during installation, which improves the installation efficiency during use.

[0008] Preferably, the pressure relief valve group includes a first pressure relief pipe and a second pressure relief pipe, and the first pressure relief pipe and the second pressure relief pipe are respectively connected to the inflation pipe and the system side channel.

[0009] By adopting the above technical solution, the first pressure relief pipe and the second pressure relief pipe can conveniently release the pipeline pressure in the inflation pipe and the system side channel, thereby ensuring the stability and safety of the system pressure.

[0010] Preferably, the hydraulic alarm device is arranged outside the valve body, one end of the hydraulic alarm device is connected to the water supply side channel and the other end is connected to the system side channel, and the hydraulic alarm device is provided with a pressure switch.

[0011] By adopting the above technical scheme and setting the pressure switch, the hydraulic alarm device is normally filled with water at the lower end and gas at the upper end. It will not alarm when the pressure on both sides does not reach the preset value of the pressure switch. When the gas at the upper end is discharged into the water source, the pressure switch opens to connect the pipelines at both ends, triggering the hydraulic alarm device to alarm, thereby effectively improving the sensitivity and reliability of the hydraulic alarm device and facilitating timely detection and handling of dangers.

[0012] Preferably, pressure gauges are provided on the pre-action valve cover and the inflation pipe.

[0013] By adopting the above technical solution, the setting of the pressure gauge makes it easy to monitor the pressure in the valve group control chamber and the inflation pipeline, thereby improving the safety and convenience of using the device.

[0014] Preferably, an inflation branch pipe is provided between the air intake pipe and the inflation pipe, and a branch pipe control valve is provided on the inflation branch pipe.

[0015] By adopting the above technical solution, the setting of the inflation branch pipe and the branch pipe control valve allows the gas to be directly charged into the inflation pipe from the air inlet pipe, thereby improving the efficiency of gas being charged into the fire protection pipeline from the system side channel.

[0016] Preferably, flange plates are provided at both upper and lower ends of the valve body.

[0017] By adopting the above technical solution, the flange flange plate can improve the stability of the connection of the pre-action device.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] First, by directly arranging the one-way valve group and the pre-action valve group in the valve body, the structure of the pre-action device is more compact, making its installation and maintenance more convenient, avoiding the need to separately install the valve body and the one-way valve group during installation, and reducing the cost and time of installation and maintenance;

[0020] Secondly, by providing the diaphragm seal, the first elastic reset member and the pre-action valve cover, as well as the air intake pipe and the solenoid valve group, the stability and convenience of the pre-action device can be improved;

[0021] Thirdly, by arranging the hydraulic alarm device outside the valve body, connecting one end of the device to the water supply side channel and the other end to the system side channel, and arranging a pressure switch, the sensitivity and reliability of the hydraulic alarm device can be improved, and system failures can be discovered and handled in a timely manner;

[0022] Fourthly, by providing the first pressure relief pipe and the second pressure relief pipe, the pressure relief efficiency can be improved and the stability and safety of the system pressure can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view of a pre-action device that is easy to install;

[0024] Figure 2 It is a left side view of a pre-action device which is easy to install;

[0025] Figure 3 It is a right side view of a pre-action device that is easy to install;

[0026] Figure 4 The present invention is a partial cross-sectional view of a pre-action device which is easy to install.

[0027] Figure numerals: 1. valve body; 2. hydraulic alarm device; 3. water supply side channel; 4. system side channel; 5. connecting channel; 6. diaphragm sealing gasket; 7. first elastic reset member; 8. pre-action valve cover; 9. valve group control chamber; 10. air intake pipe; 11. solenoid valve group; 12. inflation pipe; 13. upper one-way valve plate; 14. lower one-way valve plate; 15. valve core; 16. second elastic reset member; 17. first pressure relief pipe; 18. second pressure relief pipe; 19. pressure switch; 20. pressure gauge; 21. inflation branch pipe; 22. branch pipe control valve; 23. flange flange disc. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] A pre-action device that is easy to install, such as Figure 1-Figure 4As shown, it includes a valve body 1, a pre-action valve group, a hydraulic alarm device 2, a pressure relief valve group and a one-way valve group. The one-way valve group and the pre-action valve group are respectively arranged at the upper and lower ends of the valve body 1. The valve body 1 is provided with a water supply side channel 3 on the lower side of the pre-action valve group. The valve body 1 is provided with a system side channel 4 on the upper end of the one-way valve group. A connecting channel 5 is provided between the pre-action valve group and the one-way valve group. The lower end of the valve body 1 is connected to the fire water inlet pipe and the upper end is connected to the fire pipeline. The water source enters the valve body 1 from the water supply side channel 3 at the lower end of the valve body 1, and flows into the fire pipeline from the water supply side channel 3 after passing through the connecting channel 5. The pre-action valve group includes a diaphragm sealing gasket 6, a first elastic reset member 7 and a pre-action valve cover 8. The front wall of the lower end of the valve body 1 is provided with a pre-action valve port. The action valve cover 8 is arranged on the outside of the pre-action valve port, the diaphragm sealing gasket 6 is arranged on the inside of the pre-action valve port and forms a valve group control chamber 9 with the pre-action valve cover 8, the first elastic reset member 7 is arranged between the diaphragm sealing gasket 6 and the pre-action valve cover 8, the valve body 1 is provided with an air intake pipe 10 connected with the valve group control chamber 9, the air intake pipe 10 is provided with an electromagnetic valve group 11, the pre-action valve cover 8 is provided with an inflation pipe 12 connecting the valve group control chamber 9 and the system side channel 4, the gas passes from the electromagnetic valve group 11 through the air intake pipe 10 into the valve group control chamber 9, so that the diaphragm sealing gasket 6 swells and closes the connecting channel 5 under the action of air pressure and the first elastic reset member 7, blocks the connection between the water supply side channel 3 and the system side channel 4, and prevents the water source from entering the fire protection pipeline. After the valve group control chamber 9 is filled with gas, the gas passes through the inflation pipe 12, is filled into the system side channel 4 from the valve group control chamber 9, and finally enters the fire-fighting pipeline, so that the fire-fighting pipeline is converted from wet type to dry type. The one-way valve group includes an upper one-way valve plate 13, a lower one-way valve plate 14, a valve core 15 and a second elastic reset member 16. The upper one-way valve plate 13 and the lower one-way valve plate 14 are arranged at the upper end of the valve body 1 and the upper one-way valve plate 13 is arranged on the upper side of the lower one-way valve plate 14. The upper one-way valve plate 13 and the lower one-way valve plate 14 are respectively provided with an upper one-way valve hole and a lower one-way valve hole. The valve core 15 and the second elastic reset member 16 are arranged between the upper one-way valve plate 13 and the lower one-way valve plate 14. The upper and lower ends of the second elastic reset member 16 are respectively connected to the upper one-way valve plate 13 and the valve core 15. The core 15 abuts and can push the valve core 15 to move downward to close the lower one-way valve hole. The valve core 15 can keep the lower one-way valve hole in a normally closed state under the action of the second elastic reset member 16, and the second elastic reset member 16 applies a force from top to bottom to the valve core 15, so that the one-way valve group allows the medium to flow only from bottom to top, so that the gas entering the system side channel 4 will not flow back into the connecting channel 5 to squeeze the diaphragm sealing gasket 6, affecting the sealing effect of the diaphragm sealing gasket 6 on the connecting channel 5. By directly arranging the one-way valve group and the pre-action valve group directly inside the valve body 1, not only the overall structure of the valve body 1 is optimized, but also the installation of the valve body 1 is made more convenient, and there is no need to install the one-way valve separately during installation, thereby improving the installation efficiency during use.

[0030] The pressure relief valve group includes a first pressure relief pipe 17 and a second pressure relief pipe 18, which are respectively connected to the inflation pipe 12 and the system side channel 4. The first pressure relief pipe 17 and the second pressure relief pipe 18 can conveniently release the pipeline pressure in the inflation pipe 12 and the system side channel 4 to ensure the stability and safety of the system pressure. The hydraulic alarm device 2 is arranged on the outside of the valve body 1, and one end of the hydraulic alarm device 2 is connected to the water supply side channel 3 and the other end is connected to the system side channel 4. The hydraulic alarm device 2 is provided with a pressure switch 19. Through the setting of the pressure switch 19, the hydraulic alarm device 2 is normally filled with water at the lower end and gas at the upper end. When the pressure on both sides does not reach the preset value of the pressure switch 19, no alarm will be issued. When the gas at the upper end is discharged and flows into the water source, the pressure switch 19 is turned on to connect the pipelines at both ends to trigger the hydraulic alarm device 2 to alarm, effectively improving the sensitivity and reliability of the hydraulic alarm device 2, and facilitating timely detection and handling of dangers.

[0031] A pressure gauge 20 is provided on the pre-action valve cover 8 and the inflation pipe 12. The setting of the pressure gauge 20 is convenient for monitoring the pressure in the valve group control chamber 9 and the inflation pipe 12, thereby improving the safety and convenience of the device. An inflation branch pipe 21 is provided between the air intake pipe 10 and the inflation pipe 12, and a branch pipe control valve 22 is provided on the inflation branch pipe 21. The setting of the inflation branch pipe 21 and the branch pipe control valve 22 enables gas to be directly charged into the inflation pipe 12 from the air intake pipe 10, thereby improving the efficiency of gas being charged into the fire-fighting pipeline from the system side channel 4. Flange flange plates 23 are provided at the upper and lower ends of the valve body 1, and the flange flange plates 23 can improve the stability of the connection of the pre-action device.

[0032] When the pre-action device is to be installed, the flange flange plates 23 at the upper and lower ends of the valve body 1 are connected to the fire-fighting pipeline and the fire-fighting water inlet pipe respectively. The pre-action valve group and the one-way valve group directly installed in the valve body 1 make the installation of the pre-action device faster and more convenient. After the valve body 1 is installed, the solenoid valve group 11 on the air inlet pipe 10 is opened to pass the gas into the valve group control chamber 9, so that the diaphragm sealing gasket 6 swells and closes the connecting channel 5, blocking the communication between the water supply side channel 3 and the system side, and then the gas enters the system side channel 4 from the valve group control chamber 9 through the inflation pipe 12 and then passes into the fire-fighting water inlet pipe 16. In the pipeline, the branch control valve 22 can be opened at the same time to improve the inflation efficiency of the fire-fighting pipeline. The inflation status of the gas can be intuitively known through the pressure gauge 20. After the inflation is completed, the solenoid valve group 11 and the branch control valve 22 are closed to complete the installation of the device. After the alarm is triggered, the gas is discharged from the fire-fighting pipeline, so that the air pressure in the control cavity of the valve body 1 is reduced and the diaphragm sealing gasket 6 retracts, thereby releasing the sealing effect on the connecting channel 5. At this time, the water source flows into the system side channel 4 through the connecting channel 5 and the one-way valve and finally flows into the fire-fighting pipeline, and at the same time triggers the pressure switch 19 to cause the hydraulic alarm device 2 to trigger an alarm.

[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pre-action device which is easy to install, comprising a valve body (1), a pre-action valve group, a hydraulic alarm device (2), a pressure relief valve group and a one-way valve group, characterized in that: The one-way valve group and the pre-action valve group are respectively arranged at the upper and lower ends of the valve body (1); the valve body (1) is provided with a water supply side channel (3) at the lower side of the pre-action valve group; the valve body (1) is provided with a system side channel (4) at the upper end of the one-way valve group; a connecting channel (5) is provided between the pre-action valve group and the one-way valve group; the pre-action valve group comprises a diaphragm sealing gasket (6), a first elastic reset member (7) and a pre-action valve cover (8); a pre-action valve port is provided on the front wall of the lower end of the valve body (1); the pre-action valve cover (8) is arranged on the outer side of the pre-action valve port; the diaphragm sealing gasket (6) is arranged on the inner side of the pre-action valve port and forms a valve group control chamber (9) with the pre-action valve cover (8); the first elastic reset member (7) is arranged between the diaphragm sealing gasket (6) and the pre-action valve cover (8); the valve body (1) is provided with an air intake pipe (10) which is connected to the valve group control chamber (9); the air intake pipe (10) is connected to the valve group control chamber (9); 0) is provided with a solenoid valve group (11), the pre-action valve cover (8) is provided with an air charging pipe (12) communicating with the valve group control chamber (9) and the system side channel (4), the one-way valve group comprises an upper one-way valve plate (13), a lower one-way valve plate (14), a valve core (15) and a second elastic reset member (16), the upper one-way valve plate (13) and the lower one-way valve plate (14) are arranged at the upper end of the valve body (1), and the upper one-way valve plate (13) is arranged at the lower one-way valve plate (14). On the upper side of the valve plate (14), the upper one-way valve plate (13) and the lower one-way valve plate (14) are respectively provided with an upper one-way valve hole and a lower one-way valve hole, the valve core (15) and the second elastic reset member (16) are arranged between the upper one-way valve plate (13) and the lower one-way valve plate (14), and the upper and lower ends of the second elastic reset member (16) are respectively in contact with the upper one-way valve plate (13) and the valve core (15) and can push the valve core (15) to move downward to close the lower one-way valve hole.

2. A pre-action device that is easy to install according to claim 1, characterized in that: The pressure relief valve group comprises a first pressure relief pipeline (17) and a second pressure relief pipeline (18), wherein the first pressure relief pipeline (17) and the second pressure relief pipeline (18) are respectively connected to the inflation pipeline (12) and the system side channel (4).

3. A pre-action device that is easy to install according to claim 1, characterized in that: The hydraulic alarm device (2) is arranged outside the valve body (1), one end of the hydraulic alarm device (2) is connected to the water supply side channel (3) and the other end is connected to the system side channel (4), and the hydraulic alarm device (2) is provided with a pressure switch (19).

4. A pre-action device that is easy to install according to claim 1, characterized in that: The pre-action valve cover (8) and the inflation pipe (12) are both provided with a pressure gauge (20).

5. A pre-action device that is easy to install according to claim 1, characterized in that: An air charging branch pipe (21) is provided between the air intake pipe (10) and the air charging pipe (12), and a branch pipe control valve (22) is provided on the air charging branch pipe (21).

6. A pre-action device that is easy to install according to claim 1, characterized in that: The valve body (1) is provided with flange plates (23) at both upper and lower ends.

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