Foam pump drainage device

Abstract

The utility model relates to the technical field of fire fighting, in particular to a foam pump drainage device which comprises a fire pump, a foam source and a drainage assembly, the fire pump is provided with a first liquid suction port and a first liquid outlet, the foam pump is provided with a second liquid suction port and a second liquid outlet, the second liquid suction port is communicated with the foam source, and the second liquid outlet is communicated with the first liquid outlet. The drainage assembly comprises a vacuum pump and a reversing module, and the reversing module is connected with the vacuum pump, the first liquid suction port and the second liquid suction port. The foam pump drainage device can lead foam liquid to an inlet of the foam pump before the foam pump runs, so that the foam pump is prevented from idling to damage parts while the foam pump is prevented from being filled with the foam liquid for a long time to corrode elements, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting, in particular to a foam pump drainage device. Background Art

[0002] When the vehicle foam system is working, the foam pump starts to pressurize the foam liquid in the vehicle foam tank or external container and transport it to the pressure water pipeline, where it is mixed with water in a certain proportion to form a foam mixture. When the foam tank liquid level is low, or an external foam container is used to provide foam liquid, the foam liquid cannot flow to the foam pump inlet by its own weight.

[0003] However, the foam pumps configured in most current positive pressure foam proportioning systems have poor self-priming capabilities, and directly operating the foam pumps without foam liquid will damage their internal structures. Therefore, auxiliary means are needed to guide the foam liquid to the foam pump inlet.

[0004] In the prior art, the foam pump is controlled to stop working by means of a check valve or pipeline arrangement. At this time, a part of the foam liquid still exists at the inlet of the foam pump, so that the foam liquid can be quickly sucked in when the foam pump works next time, avoiding internal damage caused by idling of the foam pump. However, the foam liquid is easy to crystallize if it stays for a long time, thereby blocking the pipeline and affecting normal operation; moreover, the foam liquid is corrosive to a certain extent. If it exists in the foam pump for a long time, it will shorten the service life of the foam pump. Utility Model Content

[0005] The utility model aims to provide a foam pump drainage device, which can guide foam liquid to the foam pump inlet before the foam pump is operated, and prevents the foam pump from being filled with foam liquid for a long time and thus corroding the components, and prevents the foam pump from idling and damaging parts, thereby extending the service life.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] In the first aspect, the utility model provides a foam pump drainage device, including a fire pump, a foam source and a drainage assembly, the fire pump is provided with a first liquid suction port and a first liquid outlet, the foam pump is provided with a second liquid suction port and a second liquid outlet, the second liquid suction port is connected with the foam source, the second liquid outlet is connected with the first liquid outlet, the drainage assembly includes a vacuum pump and a reversing module, the reversing module is respectively connected with the vacuum pump, the first liquid suction port and the second liquid suction port.

[0008] In combination with the first aspect, further, the reversing module includes a three-way valve and a controller, the three-way valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected to the vacuum pump, the second valve port is connected to the first liquid suction port, the third valve port is connected to the second liquid suction port, and the controller is used to control the connection between the first valve port and the second valve port or the third valve port.

[0009] In combination with the first aspect, further, the foam source includes a foam tank, a first foam valve is arranged between the foam tank and the second liquid suction port, a liquid inlet valve is arranged at the bottom of the foam tank, and a breathing valve is arranged at the top of the foam tank.

[0010] In combination with the first aspect, further, a one-way valve is arranged between the first liquid outlet and the second liquid outlet.

[0011] In combination with the first aspect, further, a flow meter is arranged between the first liquid outlet and the second liquid outlet.

[0012] In combination with the first aspect, further, a pressure gauge is provided at the first liquid outlet.

[0013] In combination with the first aspect, further, a vacuum gauge is provided at the first liquid suction port.

[0014] In combination with the first aspect, further, the foam source also includes an external foam container, and a second foam valve is further provided at the second liquid suction port, and the second liquid suction port is connected to the external foam container through the second foam valve.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The foam pump drainage device provided by the utility model, through the arrangement of the drainage component, sucks the foam liquid from the foam source into the foam pump through the second liquid suction port before the foam pump is operated, which not only prevents the foam pump from idling and damaging parts, but also prevents the foam pump from being filled with foam liquid for a long time to avoid idling of the foam pump, causing corrosion of components or crystallization blockage of pipelines, thereby extending the service life; the negative pressure formed by the vacuum pump is used to provide power for the drainage component, and the connection route of the vacuum pump is changed through the arrangement of the reversing module, which can provide power for the foam pump to absorb liquid, and can also provide power for the fire pump to absorb liquid;

[0017] By cooperating with the controller and the three-way valve, the connection route of the vacuum pump is changed, which can provide power for the foam pump to absorb liquid, and also provide power for the fire pump to absorb liquid. The fast response speed and high efficiency of liquid absorption improve the speed of firefighting operations;

[0018] The setting of the liquid inlet valve makes it convenient to add foam to the foam tank and to drain the foam liquid during maintenance and cleaning of the foam tank; the setting of the breathing valve can maintain the air pressure balance in the foam tank and reduce the volatilization of the foam liquid, thus ensuring the smooth output of the foam liquid during firefighting operations;

[0019] The one-way valve is set to prevent pressurized water from flowing back into the foam pump when only water is needed to extinguish the fire. The external foam container ensures sufficient foam liquid during firefighting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a foam pump drainage device provided by an embodiment of the utility model;

[0021] The marks in the attached drawings are: 1. controller; 2. vacuum gauge; 3. fire pump; 4. vacuum pump; 5. three-way valve; 6. pressure gauge; 7. one-way valve; 8. flow meter; 9. foam pump; 10. second foam valve; 11. first foam valve; 12. foam tank; 13. liquid inlet valve; 14. breathing valve; 15. first liquid suction port; 16. first liquid outlet; 17. second liquid suction port. DETAILED DESCRIPTION

[0022] The technical solution of the present application is further described in detail below in conjunction with specific implementation methods.

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0024] In one embodiment of the present utility model, please refer to Figure 1 A foam pump drainage device includes a fire pump 3, a foam source and a drainage component. The fire pump 3 is provided with a first suction port 15 and a first liquid outlet 16. The first suction port 15 is connected to a water source to supply water to the fire pump 3. The foam pump 9 is provided with a second suction port 17 and a second liquid outlet. The second suction port 17 is connected to the foam source to suck the foam liquid in the foam source into the foam pump 9. The second liquid outlet is connected to the first liquid outlet 16, and the foam liquid passing through the second liquid outlet is mixed with the water passing through the first liquid outlet 16 in proportion to form The foam mixture is a mixture of foam liquid and water, and the drainage component includes a vacuum pump 4 and a reversing module. The vacuum pump 4 forms a negative pressure by evacuating the connected target position, and applies suction to the liquid at the target position. The reversing module is respectively connected to the vacuum pump 4, the first suction port 15 and the second suction port 17 to control the on-off connection between the vacuum pump 4 and the first suction port 15 and the on-off connection between the vacuum pump 4 and the second suction port 17, thereby controlling the vacuum pump 4 vacuum position. In this embodiment, the vacuum pump 4 can adopt a vane vacuum pump 4.

[0025] In this embodiment, the reversing module includes a three-way valve 5 and a controller 1. The three-way valve 5 is provided with a first valve port, a second valve port and a third valve port. The first valve port is connected to the vacuum pump 4, the second valve port is connected to the first liquid suction port 15, and the third valve port is connected to the second liquid suction port 17. The controller 1 is used to control the connection between the first valve port and the second valve port or the third valve port. In this embodiment, the three-way valve 5 adopts a three-way ball valve, and other three-way valves 5 such as a two-position three-way solenoid valve can also be used to connect the three valve ports to the vacuum pump 4, the first liquid suction port 15 and the second liquid suction port 17 respectively.

[0026] In this embodiment, the foam source includes a foam tank 12 mounted on a fire truck, a first foam valve 11 is provided between the foam tank 12 and the second liquid suction port 17, the first foam valve 11 is used to control the connection between the foam tank 12 and the second liquid suction port 17, a liquid inlet valve 13 is provided at the bottom of the foam tank 12, it is convenient to add foam liquid to the foam tank 12, or to empty the foam liquid in the foam tank 12 when the foam tank 12 is maintained and cleaned, and a breathing valve 14 is provided at the top of the foam tank 12, which can maintain the air pressure balance in the foam tank 12 and reduce the foam. The volatilization of the foam liquid ensures the smooth output of the foam liquid during firefighting operations. In this embodiment, the foam source also includes an external foam container. A second foam valve 10 is also provided at the second liquid suction port 17. The second liquid suction port 17 is connected to the external foam container through the second foam valve 10. The connection and disconnection between the external foam container and the second liquid suction port 17 are controlled by the second foam valve 10. During firefighting operations, when the foam liquid in the foam tank 12 is insufficient, the first foam valve 11 is closed, and the second foam valve 10 is opened to absorb the foam liquid from the external foam container.

[0027] In this embodiment, a one-way valve 7 is provided between the first liquid outlet 16 and the second liquid outlet to prevent pressurized water from flowing back into the foam pump 9 when only water is needed to extinguish the fire. A flow meter 8 is provided between the first liquid outlet 16 and the second liquid outlet to monitor the flow information at the first liquid outlet 16 and adjust the rotation speed of the foam pump 9 according to the flow rate. In this embodiment, a pressure gauge 6 is provided at the first liquid outlet 16 to monitor the pressure in the pipeline at the first liquid outlet 16. A vacuum gauge 2 is provided at the first liquid suction port 15 to measure the vacuum degree in the pipeline at the first liquid suction port 15, so as to facilitate the adjustment of the vacuum pump 4 to evacuate the first liquid suction port 15 and provide power for the fire pump 3 to suck liquid.

[0028] In this embodiment, when firefighting operations are performed and only water is needed for fire extinguishing, the fire pump 3 is started, and water is sucked from the water source into the fire pump 3 through the first suction port 15 of the fire pump 3. When the water level is lower than the impeller in the fire pump 3, it is necessary to perform water diversion operation through the drainage component, and the vacuum pump 4 performs a vacuum suction operation on the pipeline at the first suction port 15. At this time, the controller 1 controls the first valve port and the second valve port of the three-way valve 5 to be connected, so that the vacuum pump 4 is connected to the first suction port 15, and the vacuum pump 4 is started to perform a vacuum suction operation on the first suction port 15 to form a negative pressure so that the water level rises to the impeller of the fire pump 3 under the action of air pressure, and the water diversion operation is completed. Then, the impeller rotates to form pressurized water at the first liquid outlet 16 of the fire pump 3 to perform firefighting operations;

[0029] In some cases, foam liquid is needed for firefighting. At this time, open the first foam valve 11 or the second foam valve 10, start the foam pump 9 and the fire pump 3, and suck the foam liquid from the foam source into the foam pump 9 through the second suction port 17 of the foam pump 9. When the liquid level in the foam tank 12 is lower than the second suction port 17 of the foam pump 9, or when an external foam container is used to supply foam liquid, the foam liquid cannot flow to the second suction port 17 of the foam pump 9 by its own weight. At this time, it is necessary to use the drainage component to guide the foam liquid, and use the vacuum pump 4 to vacuum the pipe at the second suction port 17. At this time, the controller 1 controls the first valve port and the third valve port of the three-way valve 5 to be connected, so that the vacuum pump 4 is connected to the second suction port 17, and start The dynamic vacuum pump 4 performs a vacuum suction operation on the second liquid suction port 17 to form a negative pressure, so that the foam liquid rises to the second liquid suction port 17 of the foam pump 9 under the action of air pressure, completing the foam liquid drawing operation, and pressurizing the foam liquid at the second liquid suction port 17 through the foam pump 9, and injects it into the first liquid outlet 16 of the fire pump 3 after passing through the flow meter 8 and the one-way valve 7, and mixes with the pressurized water at the first liquid outlet 16 of the fire pump 3 to form a foam mixed liquid, and carry out firefighting operations. This embodiment utilizes the vacuum pump 4 originally configured on the fire truck, selects the pipeline acting on the vacuum pump 4 through the three-way valve 5, adds the function of helping the foam pump 9 to draw the foam liquid, and adopts the controller 1 for electronic control operation at the same time, with high liquid suction efficiency and improved firefighting operation speed.

[0030] The foam pump drainage device provided in the present embodiment, through the setting of the drainage component, sucks the foam liquid from the foam source into the foam pump 9 through the second liquid suction port 17 before the foam pump 9 is operated, which not only prevents the foam pump 9 from idling and damaging the parts, but also prevents the foam pump 9 from being filled with foam liquid for a long time to avoid idling, causing component corrosion or pipeline crystallization blockage, thereby extending the service life; the negative pressure is formed by the vacuum pump 4 to provide power for the drainage component, and the connection route of the vacuum pump 4 is changed by the setting of the reversing module, which can provide power for the foam pump 9 to absorb liquid, and also provide power for the fire pump 3 to absorb liquid; through the cooperation of the controller 1 and the three-way valve 5, the vacuum pump is changed. The connecting route 4 can provide power for the foam pump 9 to absorb liquid, and can also provide power for the fire pump 3 to absorb liquid. It has a fast response speed and high efficiency of liquid absorption, which improves the speed of firefighting operations; through the setting of the liquid inlet valve 13, it is convenient to add foam to the foam tank 12, and it is convenient to empty the foam liquid when the foam tank 12 is maintained and cleaned; through the setting of the breathing valve 14, the air pressure balance in the foam tank 12 can be maintained, and the volatilization of the foam liquid can be reduced, thereby ensuring the smooth output of the foam liquid during firefighting operations; through the setting of the one-way valve 7, when only water is needed to extinguish the fire, the pressurized water is prevented from flowing back to the foam pump 9, and the external foam container ensures that there is enough foam liquid during firefighting operations.

[0031] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model. These should also be regarded as the protection scope of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A foam pump drainage device, characterized in that: The invention comprises a fire pump (3), a foam source and a drainage component, wherein the fire pump (3) is provided with a first liquid suction port (15) and a first liquid outlet (16), and the foam pump (9) is provided with a second liquid suction port (17) and a second liquid outlet, wherein the second liquid suction port (17) is connected to the foam source, and the second liquid outlet is connected to the first liquid outlet (16), and the drainage component comprises a vacuum pump (4) and a reversing module, wherein the reversing module is respectively connected to the vacuum pump (4), the first liquid suction port (15) and the second liquid suction port (17).

2. The foam pump drainage device according to claim 1, characterized in that: The reversing module comprises a three-way valve (5) and a controller (1); the three-way valve (5) is provided with a first valve port, a second valve port and a third valve port; the first valve port is connected to the vacuum pump (4); the second valve port is connected to the first liquid suction port (15); the third valve port is connected to the second liquid suction port (17); the controller (1) is used to control the connection between the first valve port and the second valve port or the third valve port.

3. The foam pump drainage device according to claim 1, characterized in that: The foam source comprises a foam tank (12), a first foam valve (11) is arranged between the foam tank (12) and the second liquid suction port (17), a liquid inlet valve (13) is arranged at the bottom of the foam tank (12), and a breathing valve (14) is arranged at the top of the foam tank (12).

4. The foam pump drainage device according to claim 1, characterized in that: A one-way valve (7) is provided between the first liquid outlet (16) and the second liquid outlet.

5. The foam pump drainage device according to claim 1, characterized in that: A flow meter (8) is provided between the first liquid outlet (16) and the second liquid outlet.

6. The foam pump drainage device according to claim 1, characterized in that: A pressure gauge (6) is provided at the first liquid outlet (16).

7. The foam pump drainage device according to claim 1, characterized in that: A vacuum gauge (2) is provided at the first liquid suction port (15).

8. The foam pump drainage device according to claim 1, characterized in that: The foam source further comprises an external foam container, and a second foam valve (10) is further provided at the second liquid suction port (17), and the second liquid suction port (17) is connected to the external foam container via the second foam valve (10).

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