Marine foam fire extinguishing proportion mixing device

Abstract

The utility model discloses a marine foam fire extinguishing proportion mixing device, and aims to solve the problems of large mixing proportion error and large equipment size in the prior art. The device comprises a control box and an automatic foam mixing device which are connected through a cable, and the automatic mixing device is provided with a seawater medium pipeline and a foam liquid pipeline which are respectively provided with an automatic rotating speed recognition device and an electric valve. The control box calculates the theoretical flow velocity and automatically adjusts the electric valve, so that the accurate mixing ratio of the foam and the seawater is ensured. The device is simple in structure, small in size, capable of monitoring and adjusting the flow in real time and improving the mixing precision, suitable for different pipelines and foam liquid and wide in applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting, in particular to a foam fire extinguishing proportion mixing device for ships. Background Art

[0002] A foam fire-fighting mixing device is a device that mixes foam fire extinguishing agent with seawater or fire water in a specific proportion. It is primarily categorized as a balanced mixing device or a pressure-type mixing device. A pressure-type mixing device generally consists of a pressure tank, a capsule, a foam pipe, a seawater pipe, valves, and pipelines, while a balanced mixing device primarily consists of a pump, valves, pipelines, and a proportioning mixer. A pressure-type mixing device primarily utilizes the pressure generated by seawater injected into the pressure-type mixing device. This pressure then squeezes the foam liquid capsules to produce the foam liquid. A balanced mixing device primarily utilizes a pump to transport the foam liquid to the proportioning mixer. The pressure in the seawater pipe and the pressure of the foam liquid in the proportioning mixer are then used to inject the foam liquid into the seawater for mixing. However, because both designs are larger in size and both utilize pressure control, the mixing ratio can vary significantly under the same fluid pressure, while the same flow rate can be achieved under different pressures. This can lead to significant errors in the mixing ratio, especially at low flow rates. Utility Model Content

[0003] The utility model aims to provide a foam fire extinguishing proportion mixing device for ships, so as to solve the problems in the prior art of large mixing proportion error and large mixing device volume.

[0004] The utility model is realized by adopting the following technical scheme: a ship-used foam fire extinguishing proportion mixing device, characterized in that it comprises a control box and an automatic foam mixing device, the control box and the automatic foam mixing device are connected by a cable, the automatic foam mixing device comprises a seawater medium conveying pipeline and a foam liquid pipeline, the seawater medium conveying pipeline and the foam liquid pipeline are both provided with an automatic speed identification device and an electric valve, and the automatic speed identification device and the electric valve are respectively connected to the control box by a cable.

[0005] Furthermore, the automatic speed identification device includes a turbine and a speed sensor, both of which are arranged on the rotating shaft, and the fluid in the seawater medium conveying pipeline and the foam liquid pipeline flows through the turbine on the automatic speed identification device.

[0006] Furthermore, the electric valve is arranged in front of the automatic speed identification device, and the opening angle of the electric valve is controlled by a control box.

[0007] Furthermore, the seawater medium delivery pipeline is sequentially provided with an electric valve I and a speed automatic identification device I, and the foam liquid pipeline is sequentially provided with an electric valve II and a speed automatic identification device II.

[0008] Furthermore, the seawater medium delivery pipeline includes pipeline I and pipeline I, the foam liquid pipeline includes pipeline IV and pipeline V, the seawater medium delivery pipeline and the foam liquid pipeline are connected through pipeline III, and the pipeline III is a tee pipe.

[0009] Furthermore, the electric valve I is arranged between pipeline I and pipeline I, and the automatic speed identification device I is arranged between pipeline I and pipeline III.

[0010] Furthermore, the electric valve II is arranged between the pipeline IV and the pipeline V, and the automatic speed identification device II is arranged between the pipeline V and the pipeline III.

[0011] The beneficial effects of the foam fire extinguishing proportion mixing device for ships described in the utility model include:

[0012] 1. Under the premise of meeting the same functions, this patent has a simple structure and small size;

[0013] 2. It can monitor the flow rate of seawater pipelines and foam liquid pipelines in real time and control the output of foam liquid, so as to meet the fire protection system's requirements for accurately mixing foam liquid under different flow working environments of terminal fire extinguishing facilities;

[0014] 3. In actual use, different flow rates may exist under the same pressure. This patent controls the mixing ratio by converting the change in flow rate into the change in shaft speed, which has higher mixing accuracy than pressure-controlled mixing ratio.

[0015] 4. This patent allows operators to set different mixing ratios, pipe diameters, and mixing ratio tolerances on the control box according to actual usage needs to meet the mixing needs of different pipes and foam liquids, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a front view of a foam fire extinguishing proportioning mixing device for ships;

[0018] Figure 2 This is a side view of a foam fire extinguishing proportioning mixing device for ships;

[0019] Figure 3 This is a top view of a foam fire extinguishing proportioning mixing device for ships;

[0020] In the figure, 1-pipeline III, 2-bolt, 3-flat washer I, 4-spring washer I, 5-nut I, 6-speed automatic identification device I, 7-pipeline II, 8-electric valve I, 9-stud, 10-flat washer II, 11-spring washer II, 12-nut II, 13 pipeline I, 14-pipeline IV, 15-electric valve II, 16-pipeline V, 17-speed automatic identification device II, 18-sealing gasket II, 19 sealing gasket I, 20-control box, 21-cable. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] like Figure 1-3 As shown, a foam fire extinguishing proportioning mixing device for ships includes a control box 20, an automatic foam mixing device, a cable 21, etc. The control box 20 mainly relies on the cable 21 to transmit signals and control the automatic foam mixing device. The cable 21 is connected to the control box 20 through the control box 20 terminal. The electric valve I8, electric valve II 15 and sensor of the automatic mixing device are connected to the cable 21 through their own terminals.

[0024] The foam automatic mixing device is mainly composed of pipeline Ⅰ13, pipeline Ⅱ7, pipeline Ⅲ1, pipeline ⅳ14, pipeline ⅴ16, electric valve Ⅰ8, electric valve Ⅱ15, stud 9, nut Ⅰ5, nut Ⅱ12, flat washer Ⅰ3, flat washer Ⅱ10, spring washer Ⅰ4, spring washer Ⅱ11, automatic speed identification device Ⅰ6, automatic speed identification device Ⅱ17, sealing gasket Ⅰ19, sealing gasket Ⅱ18, etc., among which pipeline Ⅰ13, pipeline Ⅱ7 and pipeline Ⅲ1 are seawater medium transportation pipelines, pipeline ⅳ14, pipeline ⅴ16 and pipeline Ⅲ1 branch are foam liquid pipelines.

[0025] In the automatic foam mixing device, pipeline I13, pipeline II7, and electric valve I8 are connected using studs 9, nuts II12, flat washers II10, spring washers II11, and flanges (provided with the pipeline). The connection is sealed with gaskets I19. The same connection is used for pipelines IV14, V16, and electric valve II15. The connection is sealed with gaskets II18. Pipeline II7, pipeline III1, and automatic speed identification device I6 are connected using bolts 2, nuts I5, flat washers I3, spring washers I4, and flanges (provided with the pipeline). The connection is sealed with gaskets I19. Pipeline V16, pipeline III1, and automatic speed identification device II17 are connected in a similar manner.

[0026] The automatic speed identification device I6 is arranged on the seawater medium conveying pipeline, and the automatic speed identification device II17 is arranged on the foam liquid pipeline. Both the automatic speed identification device I6 and the automatic speed identification device II17 are provided with a turbine and a speed sensor. The pressurized seawater passes through the electric valve I8 and the pipeline II7 to reach the automatic speed identification device I6, driving the turbine in the identification device 1 to rotate with the flow of seawater, and then driving the rotating shaft to rotate. After the rotating shaft rotates, the speed sensor senses the speed of the rotating shaft by identifying the grooves on the rotating shaft. The recognition principle of the automatic speed identification device II17 is the same.

[0027] Because the foam liquid must be injected into the seawater to mix with it, the input pressure of the foam liquid before the mixing device is higher than the input pressure of the seawater. To achieve the required precise mixing ratio of foam and seawater, the ratio of the flow rate of the seawater pipeline to the flow rate of the foam liquid pipeline must be sufficient to achieve the desired mixing ratio. The flow rate is proportional to the flow rate of the liquid medium.

[0028] The diameters of the seawater pipeline and the foam liquid pipeline can be different, which is suitable for use with pipelines of various specifications. When the diameter of the seawater pipeline is D1 and the diameter of the foam liquid pipeline is D2, the more liquid volume passes through the pipeline at the same time, the faster the turbine rotates. Since the size of the turbine of the automatic speed identification device in the seawater pipeline and the foam liquid pipeline is close to the diameter of the pipeline, the relationship between the speed of the seawater pipeline and the foam liquid pipeline is as follows:

[0029] K*V 理 *π(D2 / 2) 2 =K*W*V1*π(D1 / 2) 2 (K is the coefficient)

[0030] When the flow rate of seawater reaches a certain value, the corresponding speed of the automatic speed identification device I6 is V1. In order to achieve the set mixing ratio value W, the speed value V of the automatic speed identification device II17 of the foam liquid must meet the following requirements.

[0031] V 理=(W*V1*(D1 / 2) 2 ) / (D2 / 2) 2

[0032] Press the power button of the control box 20 to power on the control box 20. The control box 20 uses its setting key to input the manually set seawater pipeline diameter, foam liquid pipeline diameter, mixing ratio and their tolerance range. Press the start button of the control box 20. The control box 20 first opens the electric valve I8 to allow seawater to enter. The control box 20 identifies the speed value of the seawater pipeline and the set seawater pipeline diameter, foam liquid pipeline diameter, mixing ratio and their tolerance range, and calculates the theoretical speed value V that the automatic speed identification device II 17 in the foam liquid pipeline needs to reach. 理 , V 理 The actual rotation value V of the foam liquid pipeline 实 For comparison, when V 理 >V 实 When the valve is within the qualified range, the control box controls the opening angle of the electric valve Ⅱ15 to increase, so that the volume of the foam liquid passing through the electric valve Ⅱ15 increases, and finally V 实 In V 理 When V 理 <V 实 When qualified, the control box controls the opening angle of the electric valve Ⅱ15 to become smaller, so that the volume of the foam liquid passing through the electric valve Ⅱ15 is reduced, and finally V 实 In V 理 within the qualified range.

[0033] When the electric valve Ⅱ15 is fully open, V 理 >V 实 When the valve is within the qualified range, the control box controls the electric valve Ⅰ8 to open at a smaller angle, reducing the volume of seawater passing through the electric valve Ⅰ8, and finally achieving V 实 In V 理 within the qualified range.

[0034] The above embodiments describe the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Without departing from the spirit and scope of the present invention, modifications and variations made by those skilled in the art without departing from the spirit and scope of the present invention should be within the scope of protection of the appended claims.

Claims

1. A foam fire extinguishing proportion mixing device for ships, characterized in that: The invention comprises a control box (20) and an automatic foam mixing device, wherein the control box (20) and the automatic foam mixing device are connected via a cable (21), and the automatic foam mixing device comprises a seawater medium delivery pipeline and a foam liquid pipeline, wherein both the seawater medium delivery pipeline and the foam liquid pipeline are provided with an automatic speed identification device and an electric valve, and the automatic speed identification device and the electric valve are respectively connected to the control box (20) via the cable (21).

2. A foam fire extinguishing proportion mixing device for ships according to claim 1, characterized in that: The automatic speed identification device includes a turbine and a speed sensor, both of which are arranged on a rotating shaft. The fluid in the seawater medium delivery pipeline and the foam liquid pipeline flows through the turbine on the automatic speed identification device.

3. A foam fire extinguishing proportion mixing device for ships according to claim 1, characterized in that: The electric valve is arranged in front of the automatic speed identification device, and the opening angle of the electric valve is controlled by a control box (20).

4. A foam fire extinguishing proportion mixing device for ships according to claim 1, characterized in that: The seawater medium delivery pipeline is provided with an electric valve I (8) and a speed automatic identification device I (6) in sequence, and the foam liquid pipeline is provided with an electric valve II (15) and a speed automatic identification device II (17) in sequence.

5. A foam fire extinguishing proportion mixing device for ships according to claim 4, characterized in that: The seawater medium delivery pipeline includes pipeline I (13) and pipeline II (7), and the foam liquid pipeline includes pipeline IV (14) and pipeline V (16). The seawater medium delivery pipeline and the foam liquid pipeline are connected through pipeline III (1), and the pipeline III (1) is a three-way pipe.

6. A foam fire extinguishing proportioning device for ships according to claim 5, characterized in that: The electric valve I (8) is arranged between the pipeline I (13) and the pipeline II (7), and the automatic speed identification device I (6) is arranged between the pipeline II (7) and the pipeline III (1).

7. A foam fire extinguishing proportioning device for ships according to claim 5, characterized in that: The electric valve II (15) is arranged between the pipeline IV (14) and the pipeline V (16), and the automatic speed identification device II (17) is arranged between the pipeline V (16) and the pipeline III (1).

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