Proportion-adjustable mechanical pumping type foam proportion mixing device

Abstract

A proportion-adjustable mechanical pumping type foam proportion mixing device is characterized in that a belt pulley transmission mechanism is arranged between a water turbine and a foam pump, the belt pulley transmission mechanism comprises a driving speed regulating wheel and a driven elastic force wheel, and the driving speed regulating wheel and the driven elastic force wheel are driven through a matched belt; an industrial poly V-belt transmission mode is adopted to replace traditional rigid coupling connection, and a driving speed regulating wheel and a driven elastic force wheel are used for finely regulating and controlling the rotating speed. The transmission matching between the water turbine and the foam pump is optimized, the foam proportion mixing precision is improved, the rigid impact and maintenance requirements of the system are reduced, meanwhile, the vertical structure achieves compact design, adapts to liquid with different viscosities, reduces the pressure drop, can adjust the dosage rate, is suitable for efficient, compact and stable fire-fighting foam proportion mixing application, and has good application prospects. Meanwhile, the proportion of the foam to the wetting agent can be accurately controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foam fire extinguishing, especially relates to a proportion adjustable mechanical pump type foam proportion mixing device. BACKGROUND

[0002] Foam fire extinguishing and wetting agent fire extinguishing are more and more widely used in various fire protection scenes due to their high efficiency. Foam fire extinguishing system is widely used in high-risk fire protection scenes such as petrochemical industry, aerospace, warehousing and logistics, and its core function is to generate efficient fire extinguishing foam by accurately mixing foam liquid and water. Wetting agent fire extinguishing is suitable for scenes such as forest fire and residential fire, which can reduce the surface tension of water and make it more easily penetrate the burning material, thereby improving the fire extinguishing efficiency. The typical mixing ratio of wetting agent is between 0.1% and 0.5%, and it can reach 1% in some special scenes, while the typical mixing ratio of foam fire extinguishing agent is 3%, and different types of foam fire extinguishing agent may be between 1% and 6%.

[0003] In the traditional mechanical pump type foam proportion mixing device, the water turbine (or hydraulic motor) usually drives the plunger pump or gear pump directly through the rigid coupling, so that the plunger pump or gear pump runs and transports the foam liquid.

[0004] However, this direct coupling transmission method has the following technical limitations:

[0005] 1. Poor transmission matching due to rigid connection: The optimal working speed of the water turbine and the foam pump often does not match, and the direct driving method cannot optimize the speed, which may cause large errors in the mixing ratio of the foam.

[0006] 2. Complex structure and large space occupation: The coupling transmission method requires high accuracy of the centering between the water turbine and the foam pump, which is complex to install and limits the flexibility of the equipment arrangement, which is not conducive to compact fire extinguishing systems.

[0007] 3. Rigid impact and torque fluctuation affect reliability: Since the flow fluctuation of the water turbine is large, its direct driving of the foam pump may cause large torque impact, which causes the mechanical wear of the pump to increase and affects the long-term operation stability.

[0008] 4. High maintenance cost: The coupling may cause additional mechanical stress due to axial and radial errors during long-term operation, increasing the wear of the pump bearing and transmission components, and the maintenance cost is high.

[0009] Therefore, it is urgent to develop a mechanical pump type foam proportion mixing device to solve the problems of insufficient matching and poor operation stability in the prior art. SUMMARY

[0010] The utility model discloses a purpose is to above prior art's insufficient, provide a kind of proportion adjustable mechanical pump formula foam proportion mixing device, utilize driving speed regulation wheel and driven elastic wheel fine control rotational speed, improve stability.

[0011] To solve above technical problem, the utility model adopts technical scheme:

[0012] A kind of proportion adjustable mechanical pump formula foam proportion mixing device, including water turbine, foam pump and the belt pulley transmission mechanism being equipped between the two, and belt pulley transmission mechanism includes driving speed regulation wheel and driven elastic wheel, driving speed regulation wheel and driven elastic wheel are driven by the belt transmission of being equipped;

[0013] The output shaft of water turbine is connected with the driving speed regulation wheel of belt pulley transmission mechanism, the input shaft of foam pump is connected with the driven elastic wheel of belt pulley transmission mechanism, and water turbine indirectly drives foam pump by belt pulley transmission mechanism.

[0014] The driving speed regulation wheel is first double cone plate structure, and first double cone plate structure includes first fixed hammer disc and first movable cone plate, first fixed hammer disc is fixed on the output shaft of water turbine, and first movable cone plate is slidably sleeved on the output shaft of water turbine and is adjusted by the locking mechanism of being equipped limit.

[0015] The locking mechanism adopts screw transmission pair, and is equipped with hand wheel for rotation adjustment.

[0016] The screw transmission pair includes nut mounted on the outside of sliding cone plate, and the output shaft of water turbine is machined with matched helical groove and constitutes helical transmission, and hand wheel is mounted on the outside of nut.

[0017] The driven elastic wheel is second double cone plate structure, and second double cone plate structure includes second fixed hammer disc and second movable cone plate, second fixed hammer disc is fixed on the input shaft of foam pump, and second movable cone plate is slidably sleeved on the input shaft of foam pump and is axially elastically limited by the spring mechanism of being equipped.

[0018] The outside of belt pulley transmission mechanism is also covered with protection fume hood.

[0019] The foam pump is connected with first pipeline, and first pipeline includes foam liquid access pipe, foam liquid output pipe and wetting agent access pipe, for the delivery of foam liquid and wetting agent.

[0020] The foam pump is also connected with third pipeline for flushing and no foam liquid inspection mixing ratio.

[0021] The water turbine is connected with second pipeline for conveying water flow.

[0022] The utility model discloses the beneficial effect is:

[0023] (1) The proportional mechanical pump foam proportioning device, by being provided with a belt pulley transmission mechanism between the water turbine and the foam pump, and the belt pulley transmission mechanism comprising a driving speed regulating wheel and a driven elastic wheel, the driving speed regulating wheel and the driven elastic wheel are driven through the provided belt, industrial multi-wedge belt transmission is adopted to replace the traditional rigid coupling connection, and the rotation speed is finely controlled by the driving speed regulating wheel and the driven elastic wheel. The transmission matching between the water turbine and the foam pump is more optimized, the foam proportioning precision is improved, the rigid impact of the system is reduced, and the maintenance requirement is reduced, a compact design is realized by the vertical structure, different viscosity liquids are adapted, the pressure drop is reduced, and the dosage rate can be adjusted, and the device is suitable for efficient, compact and stable fire foam proportioning application, and the proportion of foam and wetting agent can be accurately controlled, the foam mixing ratio reaches 3%, the wetting agent mixing ratio is in the range of 0.1%-0.5%, and in some scenes, the wetting agent mixing ratio can reach 1%, the multifunctionality of the device is improved, and the device is suitable for different fire scenes.

[0024] (2) Optimize power matching by adopting a belt pulley transmission: precisely control the rotation speed by the driving speed regulating wheel and the driven elastic wheel, and significantly improve the precision of foam and wetting agent mixing.

[0025] (3) Flexible transmission reduces torque impact: the spring structure of the driven elastic wheel reduces the mechanical wear of the foam pump and improves the long-term operation stability.

[0026] (4) Vertical structure: compact structure, reduces installation difficulty, and is suitable for space-limited scenes such as fire trucks and container fire extinguishing systems.

[0027] (5) Low maintenance requirement and long service life: reduces long-term operation and maintenance cost.

[0028] (6) Adapt to different viscosity liquids: including high-viscosity foam liquid and low-viscosity wetting agent, and widening the application range.

[0029] (7) Reduce pressure drop: improve overall energy efficiency and reduce operation cost.

[0030] (8) Adjustable dosage rate: improve fire extinguishing efficiency and play a good fire extinguishing effect in different scale fire scenes. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a perspective view of the utility model;

[0032] Figure 2 is a front view of the utility model;

[0033] Figure 3 is a top view of the utility model;

[0034] Figure 4 is a structure schematic view of the driving speed regulating wheel;

[0035] Figure 5 is a structural schematic view of the driven elastic wheel. DETAILED DESCRIPTION

[0036] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosed content.

[0037] The present application provides a proportion-adjustable mechanical pump-in foam proportion mixing device, as shown in the figure. Figures 1 to 5

[0038] The proportion-adjustable mechanical pump-in foam proportion mixing device comprises a water turbine 1, a foam pump 3, and a belt pulley transmission mechanism 2 arranged between the water turbine 1 and the foam pump 3, and the belt pulley transmission mechanism 2 comprises a driving speed regulating wheel 21 and a driven elastic wheel, and the driving speed regulating wheel and the driven elastic wheel are driven through the arranged belt.

[0039] The output shaft of the water turbine 1 is connected with the driving speed regulating wheel of the belt pulley transmission mechanism 2, the input shaft of the foam pump 3 is connected with the driven elastic wheel of the belt pulley transmission mechanism 2, and the water turbine 1 indirectly drives the foam pump 3 through the belt pulley transmission mechanism 2.

[0040] In the embodiment, the driving speed regulating wheel is a first double-cone structure, the first double-cone structure comprises a first fixed hammer disc 21 and a first movable cone disc 22, the first fixed hammer disc 21 is fixedly arranged on the output shaft of the water turbine 1, and the first movable cone disc 22 is slidingly sleeved on the output shaft of the water turbine 1 and is adjusted and limited through the arranged locking mechanism 23. The locking mechanism 23 can adopt a screw transmission pair, and a hand wheel 24 for rotating adjustment is arranged; the screw transmission pair comprises a nut arranged on the outer side of the sliding cone disc, a screw groove matched with the nut is machined on the output shaft of the water turbine and forms a screw transmission, and the hand wheel is arranged on the outer side of the nut. The unique double-cone structure cooperates with the screw transmission pair and the hand wheel to realize manual adjustment of the diameter.

[0041] The driven elastic wheel is arranged as a second double-cone structure 25, and the second double-cone structure 25 comprises a second fixed hammer disc and a second movable cone disc, the second fixed hammer disc is fixedly arranged on the input shaft of the foam pump, and the second movable cone disc is slidingly sleeved on the input shaft of the foam pump and is axially elastically limited through the arranged spring mechanism 26; the driven elastic wheel is connected with the input shaft of the foam pump, adopts a double-cone structure connected with a strong spring, and can be self-adaptively adjusted.

[0042] The belt pulley transmission ratio can be adjusted through the driving speed regulating wheel according to the viscosity and flow demand of the foam liquid or wetting agent, and stepless speed change of the required proportion can be realized.

[0043] ​The pulley transmission mechanism 2 is also covered with a protective ventilation cabinet 7, which is used to enclose and support the pulley transmission system, while providing ventilation and heat dissipation functions to prevent the belt transmission system from being affected by overheating.

[0044] The first pipeline 4 is connected to the foam pump 3, and the first pipeline 4 includes a foam liquid inlet pipe, a foam liquid outlet pipe, and a wetting agent inlet pipe for the delivery of foam liquid and wetting agent. The third pipeline 6 is also connected to the foam pump for flushing and non-foam liquid test mixing ratio. The second pipeline 5 is connected to the water turbine 1 for delivering water flow, which drives the water turbine 1 to generate power and mix with the foam liquid or wetting agent in the water output pipe.

[0045] The adjustable mechanical pump foam proportioning device, the water turbine 1 drives the foam pump 3 to operate indirectly through the pulley transmission mechanism 2. This transmission mode allows the water turbine and the foam pump to operate independently, optimizing the space layout. In high-flow-demand and space-limited scenarios, such as inside a fire truck, a container-type fire extinguishing system, etc., this device can reasonably arrange component positions, effectively save space, and meet actual use requirements. At the same time, by adjusting the pulley diameter, the foam or wetting agent proportion can be optimized for different fire fighting requirements, realizing adjustable dosage rate.

[0046] The device adds a pulley transmission mechanism 2 instead of a traditional shaft coupling transmission mechanism, achieving more precise adjustable foam proportioning. Through the cooperation of the driving speed regulating wheel and the driven elastic wheel, the foam or wetting agent mixing ratio (1%-3%) can be manually adjusted more accurately according to different fire types in the same fire extinguishing application, to achieve the best fire extinguishing effect. For example, for high-risk flammable liquid fires, the foam proportion can be adjusted to a high proportion of foam extinguishing mode, while in general solid combustion fire scenarios, the foam or wetting agent proportion can be switched to a lower proportion, thereby significantly improving the flexibility and adaptability of the system.

[0047] In addition, the device adopts a three-dimensional installation design, which can make full use of limited space, making it suitable for space-limited environments such as fire trucks, ships, container-type fire extinguishing systems, etc. The traditional shaft coupling scheme has higher requirements for installation location, resulting in a larger overall device occupying space. The pulley transmission mechanism, combined with the characteristics of the driving speed regulating wheel and the driven elastic wheel, allows the equipment to be more flexible and efficient in compact spaces, providing an ideal solution for fire fighting systems in narrow spaces.

[0048] The manual adjustment structure of the active speed regulation wheel. When the operator rotates the hand wheel, the nut will move axially along the spiral groove, and then drive the sliding cone to slide on the shaft. When the hand wheel is rotated clockwise, the sliding cone approaches the fixed cone, and the V-belt is squeezed to a position farther from the shaft center, and the effective working diameter of the driving wheel increases. When the hand wheel is rotated counterclockwise, the sliding cone moves away from the fixed cone, and the effective working diameter of the driving wheel decreases. In this way, the diameter of the active speed regulation wheel can be accurately adjusted to meet different transmission ratio requirements.

[0049] The self-adaptive adjustment of the driven elastic wheel. The driven elastic wheel is also composed of two cones, and the second movable cone is connected to the fixed seat on the shaft through a set of strong springs. The springs always exert an axial elastic force on the second movable cone, making it tend to approach the second fixed cone.

[0050] When the diameter of the active speed regulation wheel changes, the tension of the V-belt changes. If the diameter of the driving wheel increases, the V-belt is tightened, and the tension acts on the driven elastic wheel, overcoming the spring force to compress the spring, increasing the distance between the two cones, and the V-belt approaches the shaft center, reducing the effective working diameter of the driven wheel. Conversely, when the diameter of the driving wheel decreases, the spring force pushes the elastic cone to move outward, increasing the effective working diameter of the driven wheel. This self-adaptive adjustment mechanism ensures the stability of the tension of the belt and the transmission ratio during transmission.

[0051] In addition, according to different water turbines and foam pump volume ratios, the initial size, adjustable maximum and minimum diameter range, and spring elastic coefficient of the active speed regulation wheel and the driven elastic wheel can be accurately calculated; ensure that the diameter of the driven wheel can change from the maximum value to the minimum value when the diameter of the driving wheel is adjusted from the minimum value to the maximum value, and the diameter ratio of the two can cover the required proportional variable speed range.

[0052] The operator adjusts the diameter of the driving wheel by manually rotating the hand wheel; during the adjustment process, according to the running state and actual demand of the equipment, slowly and smoothly, so that the transmission ratio changes continuously, and finally realizes the required proportional stepless speed change. At the same time, a scale or mark can be set on the adjustment mechanism to help the operator accurately grasp the degree of adjustment.

[0053] In complex fire fighting scenarios, the multi-purpose foam proportioning device can manually select the appropriate transmission ratio according to the fire situation, dynamically adjust the foam or wetting agent ratio, improve the utilization rate of fire extinguishing agent, reduce the waste of fire fighting resources, and ensure that the best fire extinguishing effect can be achieved under different fire conditions. This technology not only improves the matching and reliability of the equipment, but also expands the application range, improves the fire extinguishing efficiency, and has a broad application prospect in future fire fighting systems.

[0054] In the patent, the terms "first", "second", etc. are used to limit the parts. Those skilled in the art should know that the use of "first", "second" is only for the convenience of describing the utility model and simplifying the description, and the above terms do not have special meanings.

[0055] The basic principles, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and equivalents.

[0056] In the description of the utility model, it should be understood that the terms "front", "back", "left", "right", "center", etc. indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the utility model.

Claims

1. A proportionally adjustable mechanical pump-in foam proportioning device characterized by: The water turbine, the foam pump and the belt wheel transmission mechanism are connected, and the belt wheel transmission mechanism comprises a driving speed regulating wheel and a driven elastic wheel, and the driving speed regulating wheel and the driven elastic wheel are connected through a belt. The output shaft of the water turbine is connected with the driving speed regulating wheel of the belt wheel transmission mechanism, the input shaft of the foam pump is connected with the driven elastic wheel of the belt wheel transmission mechanism, and the water turbine indirectly drives the foam pump through the belt wheel transmission mechanism.

2. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 1, characterized in that: The driving speed regulating wheel is a first double-cone structure, which comprises a first fixed hammer disc and a first movable cone disc.

3. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 2, characterized in that: The first fixed hammer disc is fixed on the output shaft of the water turbine, and the first movable cone disc is slidably sleeved on the output shaft of the water turbine and is adjusted and limited by a locking mechanism.

4. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 3, characterized in that: The locking mechanism adopts a screw transmission pair and is provided with a hand wheel for rotation adjustment.

5. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 1, characterized in that: The screw transmission pair comprises a nut mounted on the outside of the sliding cone disc, the output shaft of the water turbine is provided with a screw groove matched with the nut to form a screw transmission, and the hand wheel is mounted on the outside of the nut.

6. A proportionally adjustable mechanical pump-in foam proportioning device according to any one of claims 1 to 5, characterized in that: The driven elastic wheel is a second double-cone structure, which comprises a second fixed hammer disc and a second movable cone disc.

7. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 6, characterized in that: The second fixed hammer disc is fixed on the input shaft of the foam pump, and the second movable cone disc is slidably sleeved on the input shaft of the foam pump and is axially elastically limited by a spring mechanism.

8. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 6, characterized in that: The outside of the belt wheel transmission mechanism is further covered with a protective ventilation cabinet.

9. A proportionally adjustable mechanical pump-in foam proportioning device according to claim 6, characterized in that: The foam pump is connected with a first pipeline, which comprises a foam liquid inlet pipe, a foam liquid outlet pipe and a wetting agent inlet pipe for conveying foam liquid and wetting agent. The foam pump is further connected with a third pipeline for flushing and non-foam liquid test mixing ratio. The water turbine is connected with a second pipeline for conveying water flow.

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