Quick-response water supply pressure reducing device of automatic sprinkler system and control method of quick-response water supply pressure reducing device

Abstract

The invention belongs to the technical field of water fire extinguishing systems, and particularly relates to a quick-response water supply pressure reducing device of an automatic water spraying fire extinguishing system and a control method thereof. The quick-response water supply pressure reducing device of the automatic water spraying fire extinguishing system comprises a PLC (Programmable Logic Controller) and a pressure reducing valve connected to the automatic water spraying fire extinguishing system, the pressure reducing valve comprises a valve body, the top of the valve body is provided with a main valve adjusting linear motor, the main valve adjusting linear motor is electrically connected with the PLC, the output end of the main valve adjusting linear motor is connected with a valve rod, the other end of the valve rod is connected with a throttling cone, the throttling cone is arranged in the valve body, a valve seat is fixed in the valve body, and the throttling cone is matched with the valve seat. According to the quick-response water supply pressure reducing device of the automatic sprinkler system and the control method of the quick-response water supply pressure reducing device, fire alarm signals of corresponding areas are received through the PLC control module, the pressure reducing valve is controlled to be opened to the proper opening degree in time, and the pressure reducing valve quickly supplies corresponding pressure water for automatic sprinkler fire extinguishing of the corresponding areas for fire extinguishing.

Description

Technical Field

[0001] The invention belongs to the technical field of water fire protection systems, and particularly relates to a water supply pressure reducing device with rapid response for an automatic sprinkler system and a control method thereof. Background Art

[0002] Some hydropower stations use a gravity pressure reducing water supply method for the automatic sprinkler system. The system users mainly consist of the main transformer sprinkler system, the oil depot sprinkler system, the cable layer sprinkler system, the generator sprinkler system, etc., and the pipe network layout is complex. When the fire protection facilities are not in use, there is no water consumption in the system, and the pressure reducing valve is usually in a fully closed condition. When the automatic sprinkler system operates, the water supply pressure reducing valve opens to different openings to supply the required pressurized water to different automatic fire extinguishing systems.

[0003] In case of a fire, the fire alarm system in the corresponding equipment area sends a reporting signal, and the alarm signal is transmitted to the fire control host to control the opening of the automatic sprinkler system in the corresponding area. However, after the fire protection facilities are opened, the pressure in the system pipe network drops rapidly, and the pressure behind the pressure reducing valve also drops synchronously. The pressure reducing valve needs to sense the drop in pressure behind the pilot valve and then control the pressure in the main valve control chamber to control the opening of the pressure reducing valve and adjust the pressure reducing valve to an appropriate opening.

[0004] The following problems will occur in this control process:

[0005] First, within a certain period after the automatic sprinkler system is opened, since the system pressure reducing valve is closed in the servo state, the system pipe network loses pressure rapidly, resulting in no water output from the fire protection facilities.

[0006] Second, after the pilot valve of the water supply pressure reducing valve is opened, it is necessary to sense the pressure behind the pilot valve to adjust the opening of the main valve, and the adjustment is slow, delaying the fire extinguishing opportunity. Summary of the Invention

[0007] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a water supply pressure reducing device with rapid response for an automatic sprinkler system and a control method thereof. The PLC control module receives the fire alarm signal in the corresponding area, controls the pressure reducing valve to open to an appropriate opening in a timely manner, and then stabilizes the pressure through the pilot valve on the pressure reducing valve, so that the pressure reducing valve quickly supplies the corresponding pressurized water for fire extinguishing to the automatic sprinkler in the corresponding area.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A water supply pressure reducing device for rapid response of an automatic sprinkler system, comprising a PLC controller and a pressure reducing valve connected to the automatic sprinkler system; the pressure reducing valve includes a valve body, a main valve regulating linear motor is installed on the top of the valve body, the main valve regulating linear motor is electrically connected to the PLC controller, the output end of the main valve regulating linear motor is connected with a valve stem, the other end of the valve stem is connected with a throttle cone, the throttle cone is arranged in the valve body, a valve seat is fixed in the valve body, and the throttle cone cooperates with the valve seat.

[0010] After the fire alarm system feeds back to the fire control host that there is a fire in a certain area, while the fire control host controls the automatic sprinkler system in the corresponding area to start, it synchronously feeds back the fire information to the PLC controller of the water supply pressure reducing valve device. The PLC controller quickly opens the water supply pressure reducing valve to an appropriate opening degree, avoiding the situation that the system pipe network loses pressure formed after the automatic sprinkler system is started and the fire fighting facilities do not discharge water due to the pressure reducing valve being closed in the servo state.

[0011] The present invention can obtain the opening degree values of the pressure reducing valve when the water supply pressure reducing valve provides corresponding water pressure after each area's automatic sprinkler system is started through the working condition simulation test of the automatic sprinkler system in the corresponding area, so as to quickly open to an appropriate opening degree within a short time to supply corresponding water pressure, avoiding the situation that the fire extinguishing opportunity is delayed due to the lag of the pilot valve of the pressure reducing valve in adjusting the opening degree of the main valve.

[0012] As a preferred scheme of the present invention, a piston is installed on the valve stem, the piston is slidably sealed with the valve body, a pressure control chamber is arranged in the valve body, the pressure control chamber is slidably sealed with the valve stem, and the pressure control chamber is located on the side of the piston away from the main valve regulating linear motor; a top block is fixed between the output end of the main valve regulating linear motor and the valve stem, and a main valve spring is connected between the top block and the piston. After the PLC controller receives the fire information, it rotates clockwise through the main valve regulating linear motor to increase the pre-tightening force of the main valve spring, thereby overcoming the water pressure in the pressure control chamber, and quickly opening the main valve of the pressure reducing valve.

[0013] As a preferred scheme of the present invention, a main valve opening sensor is installed in the valve body, the sensing end of the main valve opening sensor contacts the piston, and the main valve opening sensor is electrically connected to the PLC controller (1). The main valve displacement sensor real-time feeds back the opening degree information of the throttle cone. After opening to the preset opening degree, the main valve regulating linear motor stops rotating, the pressure reducing valve quickly supplements pressure to the fire fighting pipeline, and the fire fighting sprinkler heads in the corresponding fire prevention area of the automatic sprinkler system can normally spray water to extinguish the fire.

[0014] As a preferred embodiment of the present invention, it further includes a fire alarm system and a fire control host which are electrically connected to each other. The automatic sprinkler system and the PLC controller are respectively electrically connected to the fire control host. When there is no fire, the pressure reducing device is in a closed state. When a fire occurs in the corresponding protected area of the automatic sprinkler system, the corresponding fire alarm system will feedback information to the fire control host. The fire control host controls the automatic sprinkler system in the corresponding area to start. At the same time, the fire information in this area is sent to the PLC controller.

[0015] As a preferred embodiment of the present invention, it further includes a pilot valve. An inlet pipe and an outlet pipe are respectively connected to the pilot valve. An inlet and an outlet are provided on the valve body. The other end of the inlet pipe is connected to the inlet, and the other end of the outlet pipe is connected to the outlet; a jet pump is connected to the inlet pipe, the jet pump is connected to the pilot valve, and the jet pump is connected with a pressure conduit. The other end of the pressure conduit is connected to the pressure control chamber. The pilot valve on the pressure reducing valve body senses the change of the pressure behind the valve in real time. When the pressure is too high or too low, the pilot valve controls the water pressure conducted to the pressure control chamber of the main valve through the jet pump, so as to accurately adjust and stabilize the pressure.

[0016] As a preferred embodiment of the present invention, pressure gauges are installed on both the inlet pipe and the outlet pipe.

[0017] As a preferred embodiment of the present invention, the valve body includes a valve body main body and a control housing. The valve body main body and the control housing are connected by a flange. The throttle cone and the valve seat are arranged in the valve body main body. The top block, the main valve spring, the main valve opening sensor and the upper section of the valve stem are located in the control housing.

[0018] As a preferred embodiment of the present invention, the housing of the pressure control chamber and the valve seat form an integrally formed sealing structure. The upper end of the sealing structure is connected between the flange of the valve body main body and the flange of the control housing.

[0019] A control method for a water supply pressure reducing device with rapid response of an automatic sprinkler system includes the following steps:

[0020] S1: During the regular operation test of the automatic sprinkler system in daily life, obtain the main valve opening of the pressure reducing valve after each automatic sprinkler system is started; preset the opening data after each area's automatic sprinkler system is started into the PLC controller;

[0021] S2: When a fire occurs in the corresponding protected area of the automatic sprinkler system, the corresponding fire alarm system feedbacks information to the fire control host. The fire control host controls the automatic sprinkler system in the corresponding area to start; at the same time, the fire information is sent to the PLC controller. After receiving the information, the PLC controller drives the valve stem and the throttle cone to move through the main valve regulating linear motor, so as to quickly open the main valve of the pressure reducing valve;

[0022] S3: The main valve displacement sensor real - time feeds back the opening information of the throttle cone; when it is opened to the preset opening, the main valve regulating linear motor stops rotating, the pressure reducing valve quickly replenishes pressure to the fire pipeline, and the fire sprinklers in the corresponding fire prevention area of the automatic sprinkler fire extinguishing system spray water for fire extinguishing normally.

[0023] As a preferred solution of the present invention, the following steps are further included:

[0024] S4: The pilot valve senses the pressure change behind the pressure reducing valve in real - time. When the pressure is too high or too low, it controls the water pressure in the main valve pressure control chamber through the jet pump to perform precise pressure regulation and stabilization.

[0025] The beneficial effects of the present invention are:

[0026] The present invention can, when the fire control host issues an instruction to start the automatic sprinkler fire extinguishing system in the corresponding area, control the main valve regulating linear motor to act through the PLC controller (1), and quickly open the water supply pressure reducing valve to an appropriate opening. After the main valve of the pressure reducing valve is opened, the automatic sprinkler fire extinguishing system in the corresponding area has already started to spray water for fire extinguishing normally. Its process directly bypasses the process of the prior - art pilot valve controlling the slow opening and pressure regulation of the main valve of the pressure reducing valve, avoiding the situation of delaying the fire extinguishing opportunity caused by the non - water discharge and low pressure of fire - fighting facilities. Description of the Drawings

[0027] Figure 1 is the structural schematic diagram of the present invention;

[0028] Figure 2 is the partial structure diagram of the present invention.

[0029] In the figure: 1 - PLC controller; 2 - pressure reducing valve; 3 - main valve opening sensor; 4 - pilot valve; 21 - valve body; 22 - main valve regulating linear motor; 23 - valve stem; 24 - throttle cone; 25 - valve seat; 26 - piston; 27 - pressure control chamber; 28 - top block; 29 - main valve spring; 41 - inlet pipeline; 42 - outlet pipeline; 43 - jet pump; 44 - pressure conduit; 45 - pressure gauge; 211 - water inlet; 212 - water outlet. Detailed Embodiments

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0031] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0032] As Figure 1 and Figure 2 shown, the water supply pressure reducing device with rapid response of the automatic sprinkler system in this embodiment includes a PLC controller 1 and a pressure reducing valve 2 connected to the automatic sprinkler system; the pressure reducing valve 2 includes a valve body 21, a main valve regulating linear motor 22 is installed on the top of the valve body 21, the main valve regulating linear motor 22 is electrically connected to the PLC controller 1, the output end of the main valve regulating linear motor 22 is connected to a valve stem 23, the other end of the valve stem 23 is connected to a throttle cone 24, the throttle cone 24 is arranged in the valve body 21, and a valve seat 25 is fixed in the valve body 21, and the throttle cone 24 cooperates with the valve seat 25.

[0033] In case of a fire, in the water supply pressure reducing valve 2 system of the prior art, the main valve of the pressure reducing valve 2 will be opened only after the pilot valve 4 of the pressure reducing valve 2 senses a significant decrease in the pressure at the outlet of the pressure reducing valve 2, and the valve rear pipeline is pressurized. From the opening of the pressure reducing valve 2 to the adjustment to an appropriate pressure, it usually takes more than 120S, and the automatic sprinkler system in the corresponding area will start to spray water for fire extinguishing normally, with a lagging and slow adjustment.

[0034] After the fire alarm system feeds back to the fire control host that there is a fire in a certain area, while the fire control host controls the opening of the automatic sprinkler system in the corresponding area, it synchronously feeds back the fire information to the PLC controller 1 of the water supply pressure reducing valve 2 device. The PLC controller 1 quickly opens the water supply pressure reducing valve 2 to an appropriate opening degree, avoiding the situation that the system pipeline loses pressure due to the closing of the pressure reducing valve 2 in the servo state and the fire fighting facilities do not discharge water after the automatic sprinkler system is opened.

[0035] The present invention can obtain the opening degree value of the pressure reducing valve 2 when the water supply pressure reducing valve 2 provides the corresponding water pressure after the automatic sprinkler systems in each area are respectively opened through the working condition simulation test of the automatic sprinkler system in the corresponding area, so as to open to an appropriate opening degree in a short time to supply the corresponding water pressure, avoiding the situation that the pilot valve 4 of the pressure reducing valve 2 delays adjusting the opening degree of the main valve and delays the fire extinguishing opportunity.

[0036] Furthermore, a piston 26 is installed on the valve stem 23. The piston 26 is in sliding seal with the valve body 21. A pressure control chamber 27 is provided in the valve body 21. The pressure control chamber 27 is in sliding seal with the valve stem 23. The pressure control chamber 27 is located on the side of the piston 26 away from the main valve regulating linear motor 22. A top block 28 is fixed between the output end of the main valve regulating linear motor 22 and the valve stem 23. A main valve spring 29 is connected between the top block 28 and the piston 26. After the PLC controller 1 receives the fire information, the main valve regulating linear motor 22 rotates clockwise to increase the pre-tightening force of the main valve spring 29, thereby overcoming the water pressure in the pressure control chamber 27, and quickly opening the main valve of the pressure reducing valve 2.

[0037] Furthermore, a main valve opening sensor 3 is installed in the valve body 21. The sensing end of the main valve opening sensor 3 contacts the piston 26. The main valve opening sensor 3 is electrically connected to the PLC controller 1. The main valve displacement sensor continuously feeds back the opening information of the throttle cone 24. When the opening reaches the preset opening, the main valve regulating linear motor 22 stops rotating, and the pressure reducing valve 2 quickly replenishes pressure to the fire fighting pipeline, and the fire fighting sprinkler heads in the corresponding fire protection area of the automatic sprinkler system can spray water for fire fighting normally.

[0038] Furthermore, the present invention further includes a fire alarm system and a fire control host that are electrically connected to each other. The automatic sprinkler system and the PLC controller 1 are respectively electrically connected to the fire control host. When there is no fire, the pressure reducing device is in a closed state. When a fire occurs in the corresponding protection area of the automatic sprinkler system, the corresponding fire alarm system will feedback information to the fire control host. The fire control host controls the opening of the automatic sprinkler system in the corresponding area, and at the same time, sends the fire information in this area to the PLC controller 1.

[0039] The present invention further includes a pilot valve 4. An inlet pipe 41 and an outlet pipe 42 are respectively connected to the pilot valve 4. An inlet 211 and an outlet 212 are provided on the valve body 21. The other end of the inlet pipe 41 is connected to the inlet 211, and the other end of the outlet pipe 42 is connected to the outlet 212. A jet pump 43 is connected to the inlet pipe 41. The jet pump 43 is connected to the pilot valve 4. The jet pump 43 is connected with a pressure conduit 44. The other end of the pressure conduit 44 is connected to the pressure control chamber 27. Pressure gauges 45 are installed on both the inlet pipe 41 and the outlet pipe 42. The pilot valve 4 on the body of the pressure reducing valve 2 senses the change of the pressure behind the valve in real time. When the pressure is too high or too low, the pilot valve 4 controls the water pressure conducted to the pressure control chamber 27 of the main valve through the jet pump 43, so as to accurately regulate and stabilize the pressure.

[0040] Specifically, the valve body 21 includes a valve body 21 main body and a control housing. The valve body 21 main body and the control housing are connected by a flange. The throttle cone 24 and the valve seat 25 are arranged inside the valve body 21 main body. The upper part of the top block 28, the main valve spring 29, the main valve opening sensor 3, and the valve stem 23 are located inside the control housing. The housing of the pressure control chamber 27 and the valve seat 25 form an integrally formed sealing structure, and the upper end of the sealing structure is connected between the flange of the valve body 21 main body and the flange of the control housing.

[0041] The water supply pressure reducing device of the present invention consists of two major parts, namely a PLC control box and a pressure reducing valve 2. A new motor and an opening sensor are added to the main valve, so that the opening of the main valve can be directly controlled by the PLC. The PLC controller 1 receives the start signal of the automatic sprinkler system in the corresponding area sent by the fire control host, and controls the pressure reducing valve 2 to quickly open to an appropriate opening. After the pressure reducing valve 2 quickly opens to an appropriate opening, precise pressure regulation and stabilization are carried out through the hydraulic control of the pilot valve 4.

[0042] The control method of the water supply pressure reducing device with fast response for the automatic sprinkler system in this embodiment includes the following steps:

[0043] S1: During the regular operation test of the automatic sprinkler system in daily life (mandatory requirement of national standard for regular test), obtain the main valve opening of the pressure reducing valve 2 after each automatic sprinkler system is opened; preset the opening data after each area automatic sprinkler system is opened into the PLC controller 1.

[0044] S2: When there is no fire, the pressure reducing device is in a closed state. When a fire occurs in the corresponding protected area of the automatic sprinkler system, the corresponding fire alarm system feeds back information to the fire control host, and the fire control host controls the opening of the automatic sprinkler system in the corresponding area; at the same time, the fire situation information is sent to the PLC controller 1. After receiving the information, the PLC controller 1 rotates the main valve regulating linear motor 22 clockwise, drives the valve stem 23 and the throttle cone 24 to move through the main valve regulating linear motor 22, so as to quickly open the main valve of the pressure reducing valve 2 and compress the main valve spring 29 by the top block 28, increasing the pre-tightening force of the main valve spring 29, thereby overcoming the water pressure in the pressure control chamber 27.

[0045] S3: The main valve displacement sensor continuously feeds back the opening information of the throttle cone 24; when it is opened to the preset opening, the main valve regulating linear motor 22 stops rotating, the pressure reducing valve 2 quickly replenishes pressure to the fire fighting pipeline, and the fire fighting sprinkler heads in the corresponding fire prevention area of the automatic sprinkler system spray water for fire fighting normally.

[0046] S4: The pilot valve 4 continuously senses the pressure change behind the pressure reducing valve 2. When the pressure is too high or too low, the water pressure in the main valve pressure control chamber 27 is controlled through the jet pump 43 to perform precise pressure regulation and stabilization.

[0047] The present invention is not limited to the above optional embodiments, and any person can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A water supply pressure reducing device for rapid response of an automatic sprinkler system, characterized in that: It includes a PLC controller (1) and a pressure reducing valve (2) connected to the automatic sprinkler system; the pressure reducing valve (2) includes a valve body (21), a main valve regulating linear motor (22) is installed on the top of the valve body (21), the main valve regulating linear motor (22) is electrically connected to the PLC controller (1), the output end of the main valve regulating linear motor (22) is connected to a valve stem (23), the other end of the valve stem (23) is connected to a throttle cone (24), the throttle cone (24) is arranged in the valve body (21), a valve seat (25) is fixed in the valve body (21), and the throttle cone (24) cooperates with the valve seat (25).

2. The water supply pressure reducing device for rapid response of the automatic sprinkler system according to claim 1, characterized in that: A piston (26) is installed on the valve stem (23), the piston (26) is in sliding seal with the valve body (21), a pressure control chamber (27) is arranged in the valve body (21), the pressure control chamber (27) is in sliding seal with the valve stem (23), and the pressure control chamber (27) is located on the side of the piston (26) away from the main valve regulating linear motor (22); a top block (28) is fixed between the output end of the main valve regulating linear motor (22) and the valve stem (23), and a main valve spring (29) is connected between the top block (28) and the piston (26).

3. The water supply pressure reducing device for rapid response of an automatic sprinkler system according to claim 2, characterized in that: A main valve opening sensor (3) is installed in the valve body (21), the sensing end of the main valve opening sensor (3) contacts the piston (26), and the main valve opening sensor (3) is electrically connected to the PLC controller (1).

4. The water supply pressure reducing device for rapid response of an automatic sprinkler system according to claim 3, characterized in that: It also includes a fire alarm system and a fire control host which are electrically connected to each other, and the automatic sprinkler system and the PLC controller (1) are respectively electrically connected to the fire control host.

5. The water supply pressure reducing device for rapid response of an automatic sprinkler system according to claim 4, characterized in that: It also includes a pilot valve (4), an inlet pipe (41) and an outlet pipe (42) are respectively connected to the pilot valve (4), a water inlet (211) and a water outlet (212) are arranged on the valve body (21), the other end of the inlet pipe (41) is connected to the water inlet (211), and the other end of the outlet pipe (42) is connected to the water outlet (212); a jet pump (43) is connected to the inlet pipe (41), the jet pump (43) is connected to the pilot valve (4), the jet pump (43) is connected with a pressure conduit (44), and the other end of the pressure conduit (44) is connected to the pressure control chamber (27).

6. The water supply pressure reducing device for rapid response of an automatic sprinkler system according to claim 5, characterized in that: Pressure gauges (45) are installed on both the inlet pipe (41) and the outlet pipe (42).

7. The water supply pressure reducing device for rapid response of an automatic sprinkler system according to claim 3, characterized in that: The valve body (21) includes a valve body (21) main body and a control housing, the valve body (21) main body and the control housing are connected by a flange, the throttle cone (24) and the valve seat (25) are arranged in the valve body (21) main body, and the top block (28), the main valve spring (29), the main valve opening sensor (3) and the upper section of the valve stem (23) are located in the control housing.

8. The water supply pressure reducing device for rapid response of an automatic sprinkler system according to claim 7, characterized in that: The housing of the pressure control chamber (27) and the valve seat (25) form an integrally molded sealing structure, and the upper end of the sealing structure is connected between the flange of the valve body (21) main body and the flange of the control housing.

9. A control method for a water supply pressure reducing device with rapid response in an automatic sprinkler system, using a water supply pressure reducing device with rapid response in an automatic sprinkler system as described in claim 5, characterized in that: It includes the following steps: S1: During the regular operation test of the automatic sprinkler system in daily life, obtain the main valve opening of the pressure reducing valve (2) after each automatic sprinkler system is opened; preset the opening data after each area automatic sprinkler system is opened into the PLC controller (1); S2: When a fire breaks out in the corresponding protected area of the automatic sprinkler system, the corresponding fire alarm system feeds back information to the fire control host, and the fire control host controls the opening of the automatic sprinkler system in the corresponding area; meanwhile, the fire information is sent to the PLC controller (1). After receiving the information, the PLC controller (1) drives the valve stem (23) and the throttle cone (24) to move by adjusting the main valve of the linear motor (22), so as to quickly open the main valve of the pressure reducing valve (2). S3: The main valve displacement sensor continuously feeds back the opening information of the throttle cone (24); when it is opened to the preset opening, the main valve adjusting linear motor (22) stops rotating, and the pressure reducing valve (2) quickly replenishes pressure to the fire fighting pipeline, and the fire fighting sprinklers in the corresponding fire prevention area of the automatic sprinkler system spray water to extinguish the fire normally.

10. The control method of a water supply pressure reducing device with rapid response for an automatic sprinkler system according to claim 9, characterized in that: It also includes the following steps: S4: The pilot valve (4) continuously senses the pressure change behind the pressure reducing valve (2). When the pressure is too high or too low, the water pressure in the main valve pressure control chamber (27) is controlled through the jet pump (43) to perform precise pressure regulation and stabilization.

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