Fire-fighting medium conveying device with overpressure protection

Abstract

The embodiment of the utility model provides a fire-fighting medium conveying device with overpressure protection, and relates to the technical field of fire-fighting equipment. The fire-fighting medium conveying device with the overpressure protection function comprises a pump set unit, a conveying pipeline, a main pipeline, a valve assembly and a circulating pipeline, the conveying pipeline is connected with an inlet of the pump set unit, the end, away from the pump set unit, of the conveying pipeline is used for being connected with a fire-fighting medium source, and the main pipeline is connected with an outlet of the pump set unit; the valve assembly comprises an outlet valve and a pressure regulating valve, the pressure regulating valve is arranged on the main pipeline and located between the outlet valve and an outlet of the pump set unit, and the pressure regulating valve is used for controlling opening and closing of the main pipeline or opening and closing of the circulation pipeline. The main pipeline can be closed and the circulating pipeline can be opened through the pressure regulating valve, and the medium can circularly flow under the action of the pump set unit, so that the pressure of the main pipeline can be prevented from continuously rising, and the service life and the safety of the fire-fighting medium conveying device with the overpressure protection function are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting equipment, and particularly to a fire-fighting medium conveying device with overpressure protection. Background Art

[0002] A fire-fighting medium conveying device refers to equipment and systems used to convey fire-fighting media (such as water, foam extinguishing agent, dry powder, etc.). Such devices play a crucial role in fire-fighting and rescue operations, ensuring that fire-fighting media can be quickly and effectively conveyed to the fire site.

[0003] After research by the inventor, it is found that during the operation of some existing fire-fighting medium conveying devices, even when the device does not need to output fire-fighting medium outwardly, if the pump unit is not closed in time, it may cause the pressure in the main pipeline to continuously rise, thereby leading to damage to the fire-fighting medium conveying device with overpressure protection. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fire-fighting medium conveying device with overpressure protection, which can avoid the continuous rise of the pressure in the main pipeline when the device does not need to output fire-fighting medium outwardly and the pump unit is not closed in time, so as to ensure the service life and safety of the fire-fighting medium conveying device with overpressure protection.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a fire-fighting medium conveying device with overpressure protection, including:

[0007] A pump unit;

[0008] A conveying pipeline, which is connected to the inlet of the pump unit, and the end of the conveying pipeline far from the pump unit is used to be connected to a fire-fighting medium source;

[0009] A main pipeline, which is connected to the outlet of the pump unit;

[0010] A valve assembly, which includes an outlet valve and a pressure regulating valve. The outlet valve is arranged at the end of the main pipeline far from the pump unit, and the pressure regulating valve is arranged on the main pipeline and is located between the outlet valve and the outlet of the pump unit;

[0011] A circulation pipeline, which includes opposite first and second ends. The first end is connected to the main pipeline through the pressure regulating valve, and the second end is connected to the inlet of the pump unit;

[0012] Wherein, the pressure regulating valve is used to control the opening and closing of the main pipeline or the opening and closing of the circulation pipeline.

[0013] In an alternative embodiment, a first pressure gauge is further provided on the main pipeline, and the first pressure gauge is located between the pressure regulating valve and the outlet of the pump unit.

[0014] In an alternative embodiment, a second pressure gauge is further provided on the main pipeline, and the second pressure gauge is located between the pressure regulating valve and the outlet valve.

[0015] In an alternative embodiment, the fire medium conveying device with overpressure protection further includes a driving member connected to the pump unit. The driving member is used to control the start and stop of the pump unit. A pressure sensor is further provided on the main pipeline, and the pressure sensor is located between the outlet valve and the pressure regulating valve. The pressure sensor is used to communicate with the driving member.

[0016] In an alternative embodiment, the number of pressure sensors is multiple, and the multiple pressure sensors are arranged at intervals along the length direction of the main pipeline.

[0017] In an alternative embodiment, the fire medium conveying device with overpressure protection further includes a control system, and the control system communicates with the driving member, the pressure sensor, the outlet valve, and the pressure regulating valve.

[0018] In an alternative embodiment, the outlet valve communicates with the control system through a signal line, and / or the pressure sensor communicates with the control system through a signal line, and / or the driving member communicates with the control system through a control line.

[0019] In an alternative embodiment, a check valve is further provided on the circulation pipeline, and the fire medium in the circulation pipeline can flow from the first end to the second end.

[0020] In an alternative embodiment, a valve body is further provided at one end of the conveying pipeline away from the pump unit, and the valve body is used to control the conduction of the conveying pipeline.

[0021] In an alternative embodiment, when the pressure sensor detects that the pressure of the main pipeline is in the first pressure range, the control system controls the driving member to close. When the pressure sensor detects that the pressure of the main pipeline is in the second pressure range, the control system controls the pressure regulating valve to open the circulation pipeline and close the main pipeline;

[0022] When the outlet valve is open and the pressure sensor detects that the pressure of the main pipeline is less than the second pressure range, the control system controls the pressure regulating valve to close the circulation pipeline and open the main pipeline. When the pressure sensor detects that the pressure of the main pipeline is lower than the third pressure range, the control system controls the driving member to start;

[0023] Wherein, the second pressure range > the first pressure range > the third pressure range.

[0024] The beneficial effects of the embodiments of the present utility model are as follows: A fire-fighting medium conveying device with overpressure protection provided by the embodiments of the present utility model includes a pump unit, a conveying pipeline, a main pipeline, a valve assembly, and a circulation pipeline. The conveying pipeline is connected to the inlet of the pump unit, and the end of the conveying pipeline far from the pump unit is used to connect to a fire-fighting medium source. The main pipeline is connected to the outlet of the pump unit. The valve assembly includes an outlet valve and a pressure regulating valve. The outlet valve is arranged at the end of the main pipeline far from the pump unit, and the pressure regulating valve is arranged on the main pipeline and is located between the outlet valve and the outlet of the pump unit. The circulation pipeline includes opposite first and second ends. The first end is connected to the main pipeline through the pressure regulating valve, and the second end is connected to the inlet of the pump unit. The pressure regulating valve is used to control the opening and closing of the main pipeline or the opening and closing of the circulation pipeline. In this embodiment, the main pipeline can be closed and the circulation pipeline can be opened through the pressure regulating valve. Therefore, at this time, the fire-fighting medium still located in the main pipeline can flow between the circulation pipeline and the main pipeline between the outlet of the pump unit and the pressure regulating valve under the action of the pump unit, which can prevent the pressure of the main pipeline from continuously rising to ensure the service life and safety of the fire-fighting medium conveying device with overpressure protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the fire-fighting medium conveying device with overpressure protection provided by the embodiments of the present utility model from the first perspective;

[0027] Figure 2 It is a schematic structural diagram of the fire-fighting medium conveying device with overpressure protection provided by the embodiments of the present utility model from the second perspective;

[0028] Figure 3 It is a schematic principle diagram of the fire-fighting medium conveying device with overpressure protection provided by the embodiments of the present utility model.

[0029] Reference numerals: 1 - Fire-fighting medium conveying device with overpressure protection; 100 - Pump unit; 200 - Conveying pipeline; 300 - Main pipeline; 310 - First pressure gauge; 320 - Second pressure gauge; 330 - Pressure sensor; 410 - Outlet valve; 500 - Pressure regulating valve; 600 - Circulation pipeline; 610 - Check valve; 700 - Driving member; 800 - Control system; 810 - Signal line; 820 - Control line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0032] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The specific structure of a fire-fighting medium conveying device with overpressure protection provided by an embodiment of the utility model and the corresponding technical effects it brings are described in detail below in conjunction with the patent drawings.

[0037] Please refer to Figures 1 - 3 The embodiment of the utility model provides a fire-fighting medium conveying device 1 with overpressure protection, which includes a pump unit 100, a conveying pipeline 200, a main pipeline 300, a valve assembly and a circulation pipeline 600. The conveying pipeline 200 is connected to the inlet of the pump unit 100, and the end of the conveying pipeline 200 away from the pump unit 100 is used to be connected to the fire-fighting medium source. The main pipeline 300 is connected to the outlet of the pump unit 100. The valve assembly includes an outlet valve 410 and a pressure regulating valve 500. The outlet valve 410 is arranged at the end of the main pipeline 300 away from the pump unit 100. The pressure regulating valve 500 is arranged on the main pipeline 300 and is located between the outlet valve 410 and the outlet of the pump unit 100. The circulation pipeline 600 includes a first end and a second end opposite to each other. The first end is connected to the main pipeline 300 through the pressure regulating valve 500, and the second end is connected to the inlet of the pump unit 100. The pressure regulating valve 500 is used to control the opening and closing of the main pipeline 300 or the opening and closing of the circulation pipeline 600.

[0038] It can be understood that the fire-fighting medium enters the delivery pipeline 200 through the fire-fighting medium source, and is then transported to the main pipeline 300 under the action of the pump unit 100. When the pressure regulating valve 500 controls the main pipeline 300 to open and the circulation pipeline 600 to close, the entire main pipeline 300 is connected, and when the outlet valve 410 is opened, the fire-fighting medium can be discharged through the main pipeline 300.

[0039] When the device does not need to output fire-fighting medium to the outside, that is, when the outlet valve 410 is closed and the pump unit 100 is not closed in time, the present embodiment can close the main line 300 and open the circulation line 600 through the pressure regulating valve 500. Therefore, the fire-fighting medium still located in the main line 300 can flow between the circulation line 600 and the main line 300 located between the outlet of the pump unit 100 and the pressure regulating valve 500 under the action of the pump unit 100, which can avoid the pressure of the main line 300 from rising continuously, so as to ensure the service life and safety of the fire-fighting medium conveying device 1 with overpressure protection.

[0040] It is understandable that if the pressure regulating valve 500 and the circulation pipeline 600 are not provided, when the outlet valve 410 is closed and the pump unit 100 is not closed in time, the fire-fighting medium will not flow in the pipeline, and the components in the pump unit 100 cannot be effectively cooled, which may cause the pump to overheat, and the pump unit 100 may cause increased wear of internal parts when idling, thereby affecting the practical life of the pump unit 100.

[0041] It should be noted that, in this embodiment, the second end of the circulation pipeline 600 is directly connected to the inlet of the pump unit 100, and the delivery pipeline 200 is connected to the circulation pipeline 600. That is to say, the delivery pipeline 200 can be connected to the inlet of the pump unit 100 through the circulation pipeline 600. Of course, in some other embodiments, the delivery pipeline 200 can also be directly connected to the inlet of the pump unit 100, and the circulation pipeline 600 is connected to the inlet of the pump unit 100 through the delivery pipeline 200. Or, a three-way pipe is connected to the inlet of the pump unit 100, and the circulation pipeline 600 and the delivery pipeline 200 are directly communicated with the inlet of the pump unit 100 through the three-way pipe.

[0042] It can be understood that the fire-fighting medium flows from the first end to the second end in the circulation pipeline 600. Optionally, in order to prevent the fire-fighting medium in the circulation pipeline 600 from flowing from the second end to the first end, a check valve 610 is provided on the circulation pipeline 600, which can only make the fire-fighting medium flow from the first end to the second end.

[0043] Optionally, a valve body is further provided at one end of the delivery pipeline 200 away from the pump unit 100, and the valve body is used to control the conduction of the delivery pipeline. It can be understood that when the delivery pipeline 200 does not need to be connected to the fire-fighting medium source, the valve body can be closed to prevent the fire-fighting medium from flowing from the end of the delivery pipeline away from the pump unit 100 to the pump unit 100.

[0044] In this embodiment, a first pressure gauge 310 is further provided on the main pipeline 300, and the first pressure gauge 310 is located between the pressure regulating valve 500 and the outlet of the pump unit 100. It can be understood that the pressure condition in the main pipeline 300 can be observed in time through the first pressure gauge 310.

[0045] Moreover, since the first pressure gauge 310 is located between the pressure regulating valve 500 and the outlet of the pump unit 100, whether the pressure regulating valve 500 opens the main pipeline 300 and closes the circulation pipeline 600, or opens the circulation pipeline 600 and closes the main pipeline 300, the first pressure gauge 310 can measure the pressure condition of the pipeline in the fire-fighting medium delivery device 1 with overpressure protection at this time.

[0046] Optionally, a second pressure gauge 320 is further provided on the main pipeline 300, and the second pressure gauge 320 is located between the pressure regulating valve 500 and the outlet valve 410. By arranging the first pressure gauge 310 and the second pressure gauge 320 upstream and downstream of the pressure regulating valve 500, when the whole device is running normally, that is, when the main pipeline 300 is open and the circulation pipeline 600 is closed, the values of the first pressure gauge 310 and the second pressure gauge 320 are the same. And the accuracy of the pressure in the pipeline can be calibrated and detected by the first pressure gauge 310 and the second pressure gauge 320.

[0047] Optionally, the fire-fighting medium conveying device 1 with overpressure protection further includes a driving member 700 connected to the pump unit 100. The driving member 700 is used to control the start and stop of the pump unit 100. That is to say, after the driving member 700 is turned on, it can drive the pump unit 100 to start, and after the driving member 700 is turned off, it can make the pump unit 100 stop moving. A pressure sensor 330 is also provided on the main pipeline 300. The pressure sensor 330 is located between the outlet valve 410 and the pressure regulating valve 500. The pressure sensor 330 is used for communication connection with the driving member 700.

[0048] It can be understood that since the pressure sensor 330 is used for communication connection with the driving member 700, when the outlet valve 410 is closed and the pump unit 100 is not closed in time, the pressure in the main pipeline 300 will gradually increase at this time. When it rises to the moving condition, the pressure sensor 330 sends a signal to the driving member 700, and the driving member 700 stops to make the pump unit 100 stop moving, thereby realizing the automatic closing of the pump unit 100.

[0049] Optionally, the number of the pressure sensors 330 can be multiple, and the multiple pressure sensors 330 are arranged at intervals along the length direction of the main pipeline 300. Specifically, in this embodiment, the number of the pressure sensors 330 is two, and the two pressure sensors 330 are arranged at intervals along the length direction of the main pipeline 300. It can be understood that the main function of setting two pressure sensors 330 is to ensure the reliability of the pressure detection value, and thus ensure the accuracy of the pressure measured by the main pipeline 300. The two pressure sensors 330 can provide redundant data acquisition and increase the safety of the system. If one sensor fails, the other sensor can continue to provide data to ensure the normal monitoring of the system.

[0050] Moreover, by comparing the data of the two pressure sensors 330, it is easier to diagnose faults in the system. If the readings of the two sensors are significantly different, it may be that one of the sensors has a problem or there is an abnormal situation such as a blockage in the main pipeline 300.

[0051] Specifically, in this embodiment, the fire-fighting medium conveying device 1 with overpressure protection further includes a control system 800. The control system 800 is in communication connection with the driving member 700, the pressure sensor 330, the outlet valve 410 and the pressure regulating valve 500.

[0052] It can be understood that in actual control, both pressure sensors 330 can feedback the acquired pressure signals to the control system 800. That is to say, the control system 800 receives the pressure signals of the two pressure sensors 330 at the same time. When any one of the pressure values reaches the shutdown setting value, the shutdown operation of the driving member 700 will be started. Only when both pressure values reach the start pressure value at the same time, will the control system 800 perform the start operation of the driving member 700, ensuring the safety and reliability of the system.

[0053] In this embodiment, the outlet valve 410 is communicatively connected to the control system 800 through a signal line 810, the pressure sensor 330 is communicatively connected to the control system 800 through the signal line 810, and the driving member 700 is communicatively connected to the control system 800 through a control line 820. Compared with wireless communication connection, the wired communication connection can ensure the stability of signal transmission between the outlet valve 410, the pressure sensor 330 and the driving member 700 and the control system 800.

[0054] In this embodiment, when the pressure sensor 330 detects that the pressure in the main pipeline 300 is in the first pressure range, the control system 800 controls the driving member 700 to close. It can be understood that when the device does not need to output fire-fighting medium outward, that is, when the outlet valve 410 is closed at this time and the pump unit 100 is not closed in time, the pressure value of the entire device will increase. When it increases to the first pressure range, the pressure sensor 330 transmits the pressure signal to the control system 800, and then the control system 800 controls the pump unit 100 to stop working.

[0055] When the pressure sensor 330 detects that the pressure in the main pipeline 300 is in the second pressure range, the control system 800 controls the pressure regulating valve 500 to open the circulation pipeline 600 and close the main pipeline 300. It can be understood that when the control system 800 controls the pump unit 100 to stop working, since the entire device is still running, the pressure in the main pipeline 300 will continue to increase. When the pressure sensor 330 detects that the pressure in the main pipeline 300 is in the second pressure range, the control system 800 then controls the pressure regulating valve 500 to open the circulation pipeline 600 and close the main pipeline 300, only partially relieving the pressure, and the fire-fighting medium can return to the main pipeline 300 through the circulation pipeline 600 and then enter the inlet of the pump unit 100 again.

[0056] When the outlet valve 410 is open and the pressure sensor 330 detects that the pressure in the main pipeline 300 is less than the second pressure range, the control system 800 controls the pressure regulating valve 500 to close the circulation pipeline 600 and open the main pipeline 300. When the pressure sensor 330 detects that the pressure in the main pipeline 300 is lower than the third pressure range, the control system 800 controls the driving member 700 to start.

[0057] Moreover, the second pressure range > the first pressure range > the third pressure range.

[0058] It can be understood that when the control system 800 controls the outlet valve 410 to open, the pressure in the pipeline between the pressure regulating valve 500 and the outlet valve 410 will continuously decrease. When the pressure sensor 330 detects that the pressure in the main pipeline 300 is lower than the fourth pressure range, the control system 800 controls the pressure regulating valve 500 to close the circulation pipeline 600 and open the main pipeline 300. When the pressure value continues to decrease and the pressure sensor 330 detects that the pressure in the main pipeline 300 is lower than the third pressure range, the pressure sensor 330 transmits a pressure signal to the control system 800, and the control system 800 starts the driving member 700, and then the driving member 700 starts the pump unit 100.

[0059] Among them, the second pressure range > the first pressure range > the fourth pressure range > the third pressure range. It can be understood that the entire device can achieve automatic start and stop through the communication connection of the control system 800, the pressure sensor 330, the control valve, and the driving member 700, ensuring the effective utilization of the motor and achieving high efficiency and energy saving.

[0060] In summary, a fire-fighting medium conveying device 1 with overpressure protection provided by an embodiment of the present invention includes a pump unit 100, a conveying pipeline 200, a main pipeline 300, a valve assembly, and a circulation pipeline 600. The conveying pipeline 200 is connected to the inlet of the pump unit 100, and the end of the conveying pipeline 200 away from the pump unit 100 is used to connect to a fire-fighting medium source. The main pipeline 300 is connected to the outlet of the pump unit 100. The valve assembly includes an outlet valve 410 and a pressure regulating valve 500. The outlet valve 410 is arranged at the end of the main pipeline 300 away from the pump unit 100, and the pressure regulating valve 500 is arranged on the main pipeline 300 and is located between the outlet valve 410 and the outlet of the pump unit 100. The circulation pipeline 600 includes opposite first and second ends. The first end is connected to the main pipeline 300 through the pressure regulating valve 500, and the second end is connected to the inlet of the pump unit 100. The pressure regulating valve 500 is used to control the opening and closing of the main pipeline 300 or the opening and closing of the circulation pipeline 600. In this embodiment, the main pipeline 300 can be closed and the circulation pipeline 600 can be opened through the pressure regulating valve 500. Therefore, at this time, the fire-fighting medium still located in the main pipeline 300 can flow between the circulation pipeline 600 and the main pipeline 300 between the outlet of the pump unit 100 and the pressure regulating valve 500 under the action of the pump unit 100, which can prevent the pressure in the main pipeline 300 from rising continuously to ensure the service life and safety of the fire-fighting medium conveying device 1 with overpressure protection.

[0061] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A fire-fighting medium conveying device with overpressure protection, characterized in that, Comprising: A pump unit; A delivery pipeline, which is connected to the inlet of the pump unit, and one end of the delivery pipeline away from the pump unit is used to be connected to a fire-fighting medium source; A main pipeline, which is connected to the outlet of the pump unit; A valve assembly, which includes an outlet valve and a pressure regulating valve. The outlet valve is arranged at one end of the main pipeline away from the pump unit, and the pressure regulating valve is arranged on the main pipeline and located between the outlet valve and the outlet of the pump unit; A circulation pipeline, which includes an opposite first end and a second end. The first end is connected to the main pipeline through the pressure regulating valve, and the second end is connected to the inlet of the pump unit; Wherein, the pressure regulating valve is used to control the opening and closing of the main pipeline or the opening and closing of the circulation pipeline.

2. The fire-fighting medium delivery device with overpressure protection according to claim 1, characterized in that: A first pressure gauge is further arranged on the main pipeline, and the first pressure gauge is located between the pressure regulating valve and the outlet of the pump unit.

3. The fire-fighting medium delivery device with overpressure protection according to claim 2, characterized in that: A second pressure gauge is further arranged on the main pipeline, and the second pressure gauge is located between the pressure regulating valve and the outlet valve.

4. The fire-fighting medium delivery device with overpressure protection according to claim 1, characterized in that: The fire-fighting medium delivery device with overpressure protection further includes a driving member connected to the pump unit. The driving member is used to control the start and stop of the pump unit. A pressure sensor is further arranged on the main pipeline, and the pressure sensor is located between the outlet valve and the pressure regulating valve. The pressure sensor is used to communicate with the driving member.

5. The fire-fighting medium delivery device with overpressure protection according to claim 4, characterized in that: The number of the pressure sensors is multiple, and the multiple pressure sensors are arranged at intervals along the length direction of the main pipeline.

6. The fire-fighting medium delivery device with overpressure protection according to claim 4, characterized in that: The fire-fighting medium delivery device with overpressure protection further includes a control system, and the control system communicates with the driving member, the pressure sensor, the outlet valve and the pressure regulating valve.

7. The fire-fighting medium delivery device with overpressure protection according to claim 6, characterized in that: The outlet valve communicates with the control system through a signal line, and / or the pressure sensor communicates with the control system through a signal line, and / or the driving member communicates with the control system through a control line.

8. The fire-fighting medium delivery device with overpressure protection according to claim 1, characterized in that: A check valve is further arranged on the circulation pipeline, and the fire-fighting medium in the circulation pipeline can flow from the first end to the second end.

9. The fire-fighting medium delivery device with overpressure protection according to claim 1, characterized in that: A valve body is further arranged at one end of the delivery pipeline away from the pump unit, and the valve body is used to control the conduction of the delivery pipeline.

10. The fire medium conveying device with overpressure protection according to claim 6, wherein: When the pressure sensor detects that the pressure of the main pipeline is in the first pressure range, the control system controls the driving member to close; when the pressure sensor detects that the pressure of the main pipeline is in the second pressure range, the control system controls the pressure regulating valve to open the circulation pipeline and close the main pipeline; When the outlet valve is opened and the pressure sensor detects that the pressure of the main pipeline is less than the second pressure range, the control system controls the pressure regulating valve to close the circulation pipeline and open the main pipeline; when the pressure sensor detects that the pressure of the main pipeline is lower than the third pressure range, the control system controls the driving member to start; Wherein, the second pressure range > the first pressure range > the third pressure range.

Images