WO2008011769A1

WO2008011769A1 - Fire fighting pump and operation thereof and fire fighting system and fire engine

Info

Publication number: WO2008011769A1
Application number: PCT/CN2007/000811
Authority: WO
Inventors: Zhenyou Huang
Original assignee: Zhenyou Huang
Priority date: 2006-07-21
Filing date: 2007-03-14
Publication date: 2008-01-31
Also published as: US20090246022A1

Abstract

A fire fighting pump and operation thereof and a fire fighting system and a fire engine are disclosed. The pump includes a housing, a motor mounted inside the housing and two or more stages of series-connected impeller assemblies. A water inlet is provided on the housing between the motor and the impeller assemblies. The impeller assemblies are mounted on the impeller shaft coaxially and in series with each other. The impeller shaft is fixed on the motor shaft or is coaxial with the latter. The impeller assembly includes a thruster, an impeller, an end cover and a retaining ring on the periphery of the thruster and the impeller, and those four elements are installed in turn. Several first blades are provided in the thruster and several second blades which are correspond with the first blades in amount and location are provided in the impeller. The thruster is fixed on the impeller shaft, the impeller is pivotally coupled to the impeller shaft, and the end cover is passed through by the impeller shaft. When the pump is working, the operation thereof includes the impeller shaft rotating together with the motor shaft, the impeller shaft driving the thruster fixed thereon, and the impeller, the end cover and the retaining ring running irregularly. The lift and water feeding distanceof the pump are increased.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pump and a method of moving the same, a fire protection system provided with the water pump, and a waterproof water tanker, and more particularly to a forest fire protection Submersible pump The method of moving the pump, the fire protection system with the pump and the fire water tanker. BACKGROUND OF THE INVENTION For mountainous landforms, the terrain of the forest is complex, the terrain is steep, the grass is full of vegetation, and the vegetation is rich. Once a forest fire occurs, the fire intensity is high and the fire speed is fast. The wind extinguisher, the second tool, the fire bomb and the piggyback type are used. Fire-fighting water guns 34 and other direct rescue forest fires are extremely difficult and dangerous. In particular, they control the canopy fire, the fire on the mountain, and the high-intensity fire line. The above conventional fire tools are powerless, and they can only hope to sigh.

Water is the most common, cheapest and most effective natural fire extinguishing agent. Water fire extinguishing is the preferred method of forest fire protection in many forestry developed countries. Some existing economically sound places have taken the lead in applying water pumps, water trucks, and piggybackers. However, the water source for water fire suppression is restricted by the steep slope of the fire field and the long distance. Knapsacks 34 Fire-fighting is subject to heavy loads and no subsequent water supply on the fire. It is generally used only for cleaning fires and cannot be used to effectively control fire lines, especially high-intensity fire lines. Waterwheels are costly and limited by terrain, and are not applicable where some vehicles cannot.

The existing fire pump usually uses a motor to drive the pulley to work, and the lift is small. In order to achieve a certain height of the lift, a water pump is usually placed at a certain height, and the water is pumped to the required height step by step through a multi-stage pump. At present, the application mode of "multi-stage docking and infinite water delivery" for water pump fire extinguishing, on the one hand, due to the unbalanced pumping pressure between the pump and the pump, the phenomenon that the water belt 33 is taken out and crashes often occurs, and it is generally impossible to transfer water to the fire line. On the other hand, it is not effective to use water to extinguish fires; on the other hand, it increases cost and transportation difficulties, especially due to the need to install multiple pumps at different heights, installation time is long, and some terrains are more complicated - It may not be installed. Due to the prolonged installation time, the fire-extinguishing time is pushed back, which greatly increases the difficulty of fire extinguishing.

Forest fires occur in forested mountains, steep mountains and steep slopes, impassable roads, and difficult water sources. Forest fires do not require large flows of water to extinguish fires, but require long-range high-lift water delivery. Therefore, forest fire pumps should use lower flow, higher lift, lighter weight, and smaller volume equipment to facilitate carrying and working in the mountains, but not directly apply to large flow, low lift, size and weight are not easy to go uphill. City fire pump preparation. The existing fire-fighting water pump is not enough to understand the fire-fighting of forests. If there is no water in the forest, it will require a large flow, high water pressure and long-range misunderstanding. Second, the application of water fire to forests The study of ideas and models is not enough. The characteristics of the spread of forest fires determine the dynamic nature of the fire line. As a result, the area of the fire field is expanding and the fire line is continuously lengthened. In this regard, there is a lack of targeted and effective implementation of the application mode of "dividing troops and breaking through multiple points". Third, water is not available everywhere. In the forest area, water fire extinguishing should be applied. Water source must be solved, transported and guaranteed. The current pump can't meet the high-lift, long-distance water and high pressure resistance of forest fire extinguishing. , need to lay fast, water-distributing small-diameter water belt 33 and so on.

There is also a submersible pump for deep well operation, such as patent number 01271640.5. The submersible pump includes a casing, a motor mounted in the casing, a sleeve and a multi-stage impeller in the sleeve. The upper end of the motor is provided with an end cap, and the lower end is provided. A bearing seat, the impeller is connected in series on the impeller shaft, the impeller shaft is connected to the motor shaft via the coupling, and a water inlet is arranged on the casing between the motor and the impeller. The submersible pump of this structure has the advantages of small volume, high pressure, high lift and simple installation, compared to a submersible pump that operates with a motor driven pulley. However, the existing submersible pump, because it only uses the centrifugal force of the multi-stage impeller to pressurize, the pressurization is limited, and the lift can not meet the needs of fire fighting, so it is generally used in deep well operations and has not been used as a fire pump. In the existing method of moving the water pump, only the impeller rotates without the propeller, so the existing movement method of the submersible pump cannot form a spiral isolation propulsion mode to further increase the water pressure, so the head and the transmission The water distance is still difficult to meet the needs of fire protection, so the existing submersible pumps have not been applied to fire protection, especially forest fire protection.

The fire truck equipped with the existing water pump has a small lift and high cost, and often has the phenomenon of taking the water out of the water and crashing. It is generally impossible to transfer water to the fire line, and the effect of extinguishing the water with water cannot be effectively exerted. Existing fire trucks use constant frequency drives. When the motor of the pump starts, it reaches the rated power of the motor. The impact is large, the stability is not good, and the pump is easily damaged. Summary of the invention

The purpose of 'Ben' is to provide a fire pump that increases the lift to meet fire protection requirements by increasing the pressure between the submersible pump impeller sets.

Another object of the present invention is to provide a method of moving a fire water pump that is far away, has a high lift, and is resistant to pressure.

It is still another object of the present invention to provide a fire protection system that increases the lift to meet fire protection requirements by increasing the pressure of the fire pump.

It is still another object of the present invention to provide a fire truck with the fire protection system. A fire water pump embodying the invention, comprising a pump casing, a motor installed in the pump casing, and a second or more series impeller group installed in a cylindrical cavity in the pump casing, between the motor and the impeller group The pump casing is provided with a water inlet. The impeller group is coaxially mounted on the impeller shaft or coaxial with the motor shaft. The impeller shaft is fixed on the motor shaft. The impeller group includes a propeller, an impeller, an end cover and a retaining ring. a center of the cover is provided with a first through hole; the pusher includes a central shaft, three or more first blades, a first hub and a second hub, and the first blade is disposed between the first hub and the second hub, Three or more first guiding grooves are formed between the first hub, the first blade and the second hub, and a second through hole is formed in the central shaft to cooperate with the impeller shaft, and the pusher passes through the second through hole Fixed on the impeller shaft; the impeller includes a second blade having the same number as the first blade, a third hub and a fourth hub, the second blade is located corresponding to the position of the first blade, and the second blade is placed on the third hub and Between the fourth hub, the third hub, a second guiding groove having the same number as the first guiding groove is formed between the second blade and the fourth hub, and a third through hole matching the central axis of the propeller is disposed at the center of the impeller; the third hub of the impeller Supported on the second hub of the propeller, the central axis of the propeller is pivotally connected in the third through hole of the impeller, the retaining ring is mounted on the outer circumference of the impeller and the propeller, and the end cover is mounted on the impeller; a hole, a first guide groove of the propeller, a second flow channel of the impeller and a water flow passage formed between the retaining rings; the end cap and the thruster between the adjacent two impeller groups are mounted together, the impeller group A water flow channel is formed between the perimeter seals. The biggest difference between this technical solution and the existing submersible pump for deep well operation is the structure of the impeller group. When pumping, the impeller shaft rotates with the motor shaft, and the impeller shaft drives the propeller fixed on the impeller shaft to rotate. The impeller shaft drives the propeller fixed on the impeller shaft to rotate, and the impeller, the retaining ring and the end cover of the impeller group are propelled. Irregular rotation under the action of the device, thus forming a spiral-isolated propulsion mode, increasing the water pressure, making the water supply distance long, the lift head high, and the volume is small, no need to install a fire pump at a certain height, just pull the water pipe to The required position can be installed quickly and conveniently, without terrain restrictions, and has a wide range of applications to meet the needs of fire protection.

As a modification, a first positioning ring is disposed along a direction of the outer periphery of the small end of the first hub of the propeller facing away from the first hub, and the first positioning ring is installed in the first through hole of the end cover and cooperates with the first through hole, so that Easy to assemble.

As a modification, a second positioning ring is disposed along a direction of a large end of the outer periphery of the fourth hub of the impeller toward a small end of the fourth hub, and a first step portion is disposed on the second positioning ring, and an inner periphery of the retaining ring is The outer periphery of a step fits to facilitate assembly and sealing of the water flow path.

As an improvement, the end cover is provided with a third step portion and a fourth step portion, the outer periphery of the third step portion is engaged with the inner periphery of the retaining ring, and the outer periphery of the fourth step portion is matched with the inner periphery of the second positioning ring. Easy to assemble and seal the water flow channel. As an improvement, the maximum outer diameters of the end cap, the retaining ring and the second locating ring are equal, and are conveniently placed in the pump casing.

As an improvement, the number of stages of the impeller group is 30 to 74, and the number of the first blades of the propeller is 3 to 12, so that the single pump water delivery distance/head can reach 250Om/10Om ~ 150Om/20Om. .

The first hub and the second hub of the propeller are in the shape of an umbrella having an opening in the same direction, and the first hub is parallel to the second hub. The third hub and the fourth hub of the impeller are in the shape of an opening in the same direction, and the third hub is parallel to the fourth hub. This shape is advantageous for increasing the water pressure. A rubber washer is installed between the third through hole of the impeller and the central shaft of the propeller, which can reduce friction and mutual collision between the central shaft of the propeller and the impeller, and make the fire pump durable.

As an improvement, the maximum of the first hub is greater than the maximum outer diameter of the second hub, the maximum outer diameter of the fourth hub is greater than the maximum outer diameter of the third hub, and the maximum outer diameter of the second hub and the third hub are substantially the same, which facilitates smooth water flow. Thereby increasing the water delivery distance of the fire pump and increasing the head; the spiral direction of the first blade is opposite to the spiral direction of the second blade.

As a further improvement, the pump casing is cylindrical and easy to manufacture; the propeller, impeller, end cover and retaining ring are made of stainless steel, and the pump casing is cylindrical, which increases wear resistance and sealing, and does not require high water quality due to stainless steel. When the material is rotated at a high speed, it will not be deformed as much as the plastic material, so the pump body can be placed horizontally, diagonally, vertically, and adapted to various water qualities.

The fire pump of the present invention comprises a pump casing, a motor installed in the pump casing, and an impeller group connected in series or above in two or more stages, and a water inlet and an impeller are arranged on the pump casing between the motor and the impeller group. The coaxial group is mounted on the impeller shaft in series, and the impeller shaft is fixed on the motor shaft or coaxial with the motor shaft. The impeller group includes a propeller, an impeller and an end cover which are sequentially installed, and a retaining ring is arranged on the circumference of the propeller and the impeller. a first blade is disposed on the propeller, and a second blade having the same number and position corresponding to the first blade is disposed on the impeller, the propeller is fixed on the impeller shaft, the impeller is pivotally connected to the impeller shaft, and the end cap is worn The impeller shaft; the movement process during pumping includes the impeller shaft rotating together with the motor shaft, the impeller shaft driving the propeller rotating on the impeller shaft, the impeller shaft driving the propeller rotating on the impeller shaft, the impeller of the impeller group, The retaining ring and the end cap rotate irregularly under the action of the propeller. This method of motion of the fire pump forms a spiral-isolated propulsion mode, which increases the water pressure, makes the water supply distance long, and has a high lift, which can meet the needs of fire protection.

The fire protection system provided by the invention comprises a water pump, a water belt and a water gun. The motor of the water pump is electrically connected with an external power source or a generator. The water pump is a submersible pump. The submersible pump includes a pump casing, a motor installed in the pump casing, and a pump casing. In the cylindrical cavity, the second or second stage series impeller group is provided with a water inlet on the pump casing between the motor and the impeller group, and the impeller group is coaxially mounted in series on the impeller shaft. Upper, the impeller shaft is fixed on the motor shaft or coaxial with the motor shaft; one end of the submersible pump installation impeller group is connected with the water belt, and the other end of the water belt is connected with the water gun. The use of a submersible pump structure of a fire pump to evacuate the water belt and crash; on the other hand, reduce costs.

As an improvement, the impeller group includes a propeller, an impeller, and an end cover which are sequentially installed, a retaining ring is provided on a circumference of the propeller and the impeller, and three or more first vanes are provided on the propeller, The impeller is provided with a second blade having the same number and corresponding position as the first blade. The propeller is fixed on the impeller shaft, the impeller is pivotally connected to the impeller shaft, and the end cover passes through the impeller shaft. The biggest difference between this technical solution and the existing submersible pump for deep well operation is the structure of the impeller group. When pumping, the impeller shaft rotates with the motor shaft, and the impeller shaft drives the propeller fixed on the impeller shaft to rotate. The impeller, the retaining ring and the end cover of the impeller group rotate irregularly under the action of the propeller, thus forming a spiral isolation. The propulsion mode increases the water pressure, makes the water supply distance long, the lift is high, and the volume is small. It is not necessary to install a fire pump at a certain height. Simply pull the water pipe to the required position, and the installation is quick, convenient and free. Terrain restrictions, a wide range of applications, to meet the needs of fire protection.

As an improvement, the propeller further includes a central shaft, a first hub and a second hub, the first blade being disposed between the first hub and the second hub, and the first hub, the first blade, the second hub forming three or More than three first guiding grooves, a second through hole is formed in the central shaft to cooperate with the impeller shaft, and the propeller is fixed on the impeller shaft through the second through hole; the impeller further includes a third hub and a fourth hub, The second blade is disposed between the third hub and the fourth hub, and the third wheel guide, the second blade, and the fourth hub form a same number of the second guide groove as the first guide groove, and is disposed at the center of the impeller a third through hole that cooperates with the central shaft of the propeller; the second hub of the propeller is supported on the third hub of the impeller, the central axis of the propeller is pivotally connected in the third through hole of the impeller, and the end cover is mounted on the propulsion On the device, the retaining ring is installed outside the impeller and the propeller; the through hole of the end cap, the first diversion trough of the propeller, the second diversion trough of the impeller and the retaining ring form a peripherally sealed water flow passage; adjacent two End caps and impellers between the impeller sets are mounted Together, a peripherally sealed water flow path is formed between the impeller sets. In this way, the propeller, the impeller and the end cap are simple in structure, good in sealing performance, and the width of the cross section of the water flow passage is constantly changed, which can further increase the water pressure, so that the water supply distance is long and the lift is high.

As a modification, a first positioning ring is disposed along a direction of the outer periphery of the small end of the first hub of the propeller facing away from the first hub, and the first positioning ring is installed in the first through hole of the end cover and cooperates with the first through hole, so that Easy to assemble. a second positioning ring is disposed along a direction of a large end of the outer circumference of the fourth hub of the impeller toward the small end of the fourth hub, and a first step portion is disposed on the second positioning ring, and an inner periphery of the retaining ring and the first step portion are disposed The outer perimeter fits to facilitate assembly and sealing of the water flow path. The end cover is provided with a third step portion and a fourth step portion, and the outer periphery of the third step portion is matched with the inner periphery of the retaining ring, and the fourth step The outer periphery of the portion cooperates with the inner periphery of the second positioning ring to facilitate assembly and sealing of the water flow passage. As an improvement, the maximum outer diameters of the end cap, the retaining ring and the second locating ring are equal, and are conveniently placed in the pump casing.

As an improvement, the number of stages of the impeller group is 30 to 74, and the number of the first blades of the propeller is 3 to 12, so that the single pump water delivery distance I can reach 250Om/10Om ~ 150Om/20Om. .

The first hub and the second hub of the propeller are in the shape of an umbrella having an opening in the same direction, and the first hub is parallel to the second hub. The third hub and the fourth hub of the impeller are in the shape of an opening in the same direction, and the third hub is parallel to the fourth hub. This shape is advantageous for increasing the water pressure. A rubber washer is installed between the third through hole of the impeller and the central shaft of the propeller, which can reduce friction and mutual collision between the central shaft of the propeller and the impeller, and make the fire pump durable. The maximum of the first hub is greater than the maximum outer diameter of the second hub, the maximum outer diameter of the fourth hub is greater than the maximum outer diameter of the third hub, and the maximum outer diameter of the second hub and the third hub are substantially the same, facilitating smooth water flow, thereby increasing The water delivery distance of the large fire pump is increased and the head is increased; the spiral direction of the first blade is opposite to the spiral direction of the second blade.

As an improvement, the pump casing is cylindrical and easy to manufacture; the thruster, impeller, end cap and retaining ring are made of stainless steel, which increases the wear resistance and sealing performance. The water quality is not high, because the stainless steel material does not rotate at high speed. Like plastic materials, it will produce large deformations, so the pump body can be placed horizontally, diagonally, vertically, and adapted to various water qualities.

As a further improvement, a zero-drive variable frequency drive is provided on the generator, and a zero-drive variable frequency drive is used. When the motor of the water pump starts, the rated power of the motor is gradually reached, so that the impact is small, the stability is good, and the pump is not easy to damage the hair; the motor and the water pump Separation can increase the volume of the water storage tank. The zero-drive variable frequency drive is a general-purpose inverter. It can use the EDS1000 series 0.4-1 lkw inverter produced by Shenzhen Yineng Electric Technology Co., Ltd.

The fire truck with the fire protection system provided by the invention comprises a vehicle body, a water storage tank is installed on the vehicle body, the water pump is placed in the water storage tank, and one end of the water pump installation impeller group is exposed to the water storage tank and the water With the connection, the other end of the water belt is connected with the water gun, the generator is separated from the water pump and installed on the vehicle body, and the zero-drive variable frequency drive is installed on the motor. The submersible pump of the fire protection system has a high lift and a long distance of transportation; When a fire truck is placed at a height as a transfer station and a multi-level fire truck is connected in series, and the water is pumped to the required height step by step, the "multi-level docking, infinite water transfer" application mode of the fire truck will not be extinguished. Due to the unbalanced pumping pressure between the pump and the pump, the present invention has a pumping mechanism that uses a submersible pump structure similar to a deep well operation and adds a propeller, thereby forming a spirally isolated propulsion mode, which increases Advancing water pressure, making water supply long, high lift, drowning Easy; single pump water delivery distance / head up to 250Om / 50m ~ 100Om / 20Om, pump hourly effective water flow I head can reach 6.0m / 50m ~ 3.Om / 200Om; and small size, fast installation, convenient, It is not limited by terrain and has a wide range of application. The stainless steel material of the propeller and impeller is increased in wear resistance and sealing. The water quality is not high. Because stainless steel material will not be the same as plastic material when it is rotated at high speed. Larger deformation, so the pump body can be placed horizontally, diagonally, vertically and adapted to various water quality. The fire truck of the invention has a submersible pump structure similar to a deep well operation, and the water supply distance is long, the lift is high, and the water is easy to be drowned; the zero drive variable frequency drive is provided on the generator, the impact is small, and the stability is good. The pump is not easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing the connection of a submersible pump of the present invention to its external device.

2 is a schematic cross-sectional view of the submersible pump section of the submersible pump of the present invention taken along a central position.

Fig. 3 is a perspective exploded perspective view showing an impeller group rotated 180° according to the present invention.

4 is a schematic view of a fire truck of the present invention. DETAILED DESCRIPTION OF THE INVENTION Example 1

As shown in Figures 1 to 3, a fire protection system includes a water pump 29, a water hose 33, a generator 32, and a water gun 34. The water pump 29 is separated from the generator 32, and the water pump 29 is a submersible pump. The water pump 29 includes a cylindrical stainless steel metal pump casing 1, a motor (not shown) installed in the pump casing 1 and a 52-stage series impeller group 30, and is provided on the pump casing 1 between the motor and the impeller group 30. The water inlet 31, the impeller group 30 is coaxially mounted on the impeller shaft 2 in series, the impeller shaft 2 is an outer hexagon type metal shaft, and the impeller shaft 2 is fixed to the motor shaft (not shown) through the coupling and is identical to the motor shaft Axis linkage.

The impeller assembly 30 includes a stainless steel end cap 3, a stainless steel thruster 4, a stainless steel impeller 5, and a stainless steel retaining ring 6.

The thruster 4 includes a central shaft 7, three first blades 8, a first hub 9, and a second hub 10. The first hub 9 and the second hub 10 of the pusher 4 are in the shape of an opening in the same direction, the first hub 9 is parallel to the second hub 10, and the maximum outer diameter of the first hub 9 is greater than the maximum outer diameter of the second hub 10. The first vane 8 is disposed between the first hub 9 and the second hub 10, and three first guide grooves 11 are formed between the first hub 9, the first vane 8, and the second hub 10. A second through hole 12 is formed in the central shaft 7 to cooperate with the impeller shaft 2. The second through hole 12 is of a hexagonal type, and the pusher 4 is fixed to the impeller shaft 2 through the second through hole 12. A first positioning ring 13 is provided along the direction in which the outer periphery of the small end of the first hub 9 of the pusher 4 faces away from the first hub 9.

The impeller 5 includes the second blade 14, the third hub 15, and the fourth hub 16, which are the same number as the first blade 8, and the position of the second blade 14 corresponds to the position of the first blade 8. The third hub 15 and the fourth hub 16 of the impeller 5 are in the shape of an opening in the same direction, the third hub 15 is parallel to the fourth hub 16, and the maximum outer diameter of the third hub 15 is smaller than the maximum outer diameter of the fourth hub 16. The second vane 14 is disposed between the third hub 15 and the fourth hub 16, and the second diversion flow is formed between the third hub 15, the second vane 14, and the fourth hub 16 by the same number as the first guide groove 11. Slot 17. A third through hole 18 is engaged in the center of the impeller 5 to engage the central shaft 7 of the propeller 4, and a rubber washer 19 is fixed in the third through hole 18 of the impeller 5; outside the fourth hub 16 along the impeller 5 A second positioning ring 20 is disposed in a direction of the small end of the periphery toward the small end of the fourth hub 16, and a first step portion 21 is provided on the second positioning ring 20, and an inner periphery of the retaining ring 6 and an outer periphery of the first step portion 21 are provided. Cooperate.

A first through hole 22 is defined in the center of the end cover 3, and the first positioning ring 13 is mounted in the first through hole 22 of the end cover 3 and is engaged with the first through hole; and the third step portion 23 is provided on the end cover 3. And the fourth step portion 24, the outer periphery of the third step portion 23 is engaged with the inner periphery of the retaining ring 6, and the outer periphery of the fourth step portion 24 is engaged with the inner periphery of the second positioning ring 20.

The maximum outer diameters of the end cap 3, the retaining ring 6, and the second locating ring 20 are equal, and the maximum outer diameter of the second hub 10 and the third hub 15 are substantially the same; the spiral direction of the first vane 8 and the spiral direction of the second vane 14 in contrast,.

The rubber washer 19 is fixed in the third through hole 18 of the impeller, and the central shaft 7 of the pusher 4 is fitted into the rubber washer 19 of the impeller 5, and the third hub 15 of the impeller 5 is supported on the second hub 10 of the propeller 4, The retaining ring 6 is mounted on the outer periphery of the impeller 5 and the propeller 4 and cooperates with the first step portion 21 of the impeller 5, the central shaft 7 of the propeller 4 is fixed to the impeller shaft 2, and the impeller 5 is pivotally connected by the rubber washer 19 On the central shaft 7 of the device 4; the pusher 4 of the adjacent impeller group 30 is mounted with the end cap 3, and the outer periphery of the fourth step portion 24 of the end cap 3 cooperates with the inner periphery of the second locating ring 20 of the impeller 5 The through hole of the end cover 3, the first guide groove 11 of the propeller 4, the second flow guiding groove 17 of the impeller 5 and the retaining ring 6 form a peripherally sealed water flow passage, and the impeller group 30 forms a peripheral dense t Water flow channel.

The motor of the submersible pump is connected to the generator 32, and one end of the submersible pump mounting impeller group 30 is connected to the water belt 33, and the water belt 33 is connected to the water gun 34.

The number of the first blades is three, and the submersible pump adopts the 52-stage impeller group. The 1.5-inch 1200-meter fire hose is used as the water pipe, and the water belt is three. The diameter of the nozzle is 15 mm, and the number of the nozzles is one. It is measured by the satellite locator that the final water outlet position is 200 meters from the water level, the water output is 3.2 cubic meters per hour, and the sprayed water range is 10 meters, which can meet the needs of fire protection. The movement process of the fire pump 29 includes:

The motor shaft rotates under the driving of the motor, the impeller shaft 2 rotates together with the motor shaft, the propeller shaft 2 is fixed to the impeller 4 on the impeller shaft 2, and the impeller 5, the retaining ring 6 and the end cover 3 propeller of the impeller group 30 Irregular rotation under the action of 4, thus forming a spiral-isolated propulsion mode, increasing the water pressure, making the water supply distance long, the lift head high, and the volume is small, no need to install a fire pump 29 at a certain height, just pull the water pipe It can be installed to the required position, and it is quick and convenient to install. It is not subject to the topography of P. It has a wide range of applications and can meet the needs of fire protection.

After reconnaissance of the terrain, the remote pump operation methods include:

(1) Place the equipment: Connect the generator 32 to the pump power line, the water pump outlet to the water belt 33, and put the water pump into the water body; (2) Start up: The key starts the generator 32, closes the output power switch to connect the controller, The operation controller starts the water pump, and the pumping synchronous output water is fire; (3) Shutdown: The operation controller stops the pump, closes the output power switch to open the controller, and the key turns off the generator 32; (4) Recycling equipment: Open the drain The pressure reducing valve discharges the water with pressure, and removes the water outlet 33 of the water pump outlet, so that the water pump is taken out of the water body, the generator 32 and the water pump power line are removed, and the water belt 33 is recovered.

Precautions for remote pump operation: (1) Check if the power cord is damaged to prevent leakage; (2) Before laying the water belt 33, first explore the road and open the paving channel to achieve smooth laying; (3) strictly follow the procedure Turn on and off, otherwise it will affect the life of the equipment; (4) Before the water belt 33 is recovered, the pump outlet valve must be opened, and the water in the water belt 33 can be disconnected after the water is discharged. Example 2

Different from the first embodiment, the number of the first blades is six, the submersible pump adopts the 52-stage impeller group, and the 1.5-inch 1200 m long fire hose is used as the water pipe, and the water belt is three, and the diameter of the nozzle is 15 mm. The number of nozzles is one. According to the satellite locator, the final water outlet position is 170 meters from the water level, the water output is 3.2 cubic meters per hour, and the sprayed water range is 7.5 meters, which can meet the needs of fire protection. Example 3

Different from the second embodiment, the number of the first blades is five, and a 1.5-inch 1200 m long fire hose is used as the water pipe, and one water belt is used. The diameter of the nozzle is 5 mm, and the number of the nozzles is one. It is measured by the satellite locator that the final water outlet position is 200 meters from the water level, the water output is 3.0 cubic meters per hour, and the sprayed water range is 10 meters, which can meet the needs of fire protection. Example 4 Different from the second embodiment, the number of the first blades is seven, and the fire hose 33 of the length of 1.0 inch is used as the water pipe, and the water belt is three, the diameter of the nozzle is 3 mm, and the number of the nozzles is two. . It is measured by the satellite locator that the final water outlet position is 200 meters from the water level, the water output is 3.0 cubic meters per hour, and the sprayed water range is 10 meters, which can meet the needs of fire protection. Example 5

Different from the second embodiment, the number of the first one blades is nine, the submersible pump adopts the 30-stage impeller group, and the 1.5-inch 1200 m long fire hose is used as the water pipe, and one water belt is used, and the diameter of the spray gun mouth is 15 mm. The number of gun ports is one. According to the satellite locator, the final water outlet position is 50 meters from the water level, the water output is 2.2 cubic meters / hour, and the sprayed water range is 4.0 meters, which can meet the needs of fire protection. Example 6

Different from the embodiment 2, the impeller group 30 includes a plastic end cap 3, a plastic pusher 4, a plastic impeller 5, and a plastic retaining ring 6. The number of the first blades is 12, and the submersible pump adopts a 75-stage impeller group. The 1.0-inch 1250-meter fire hose is used as the water pipe, and there are 2 water hoses. The diameter of the nozzle is 15 mm, and the number of nozzles is one. It is measured by the satellite locator that the final water exit position is 50 meters from the water level, the water output is 2.2 cubic meters per hour, and the sprayed water range is 4.0 meters, which can meet the needs of fire protection. Example 7

As shown in FIG. 4, a fire water tank truck includes a vehicle body 40. A water storage tank 41 is mounted on the vehicle body. A cylindrical water pump 29 is placed in the water storage tank 41, and one end of the water pump 29 is mounted on the impeller group. The water storage tank 41 is connected to the water belt 33, and the other end of the water belt 33 is connected to the water gun 34. The generator 32 is separated from the water pump 29 and mounted on the vehicle body 40, and the zero drive variable frequency drive 42 is mounted on the motor. The fire protection system employs the fire protection system of the first embodiment.

Claims

Rights request

1. A fire pump comprising a pump casing, a motor mounted in the pump casing, and a second or more series impeller group installed in a cylindrical cavity in the pump casing, the pump between the motor and the impeller group The water inlet is arranged on the shell, and the impeller group is coaxially mounted on the impeller shaft in series. The impeller shaft is fixed on the motor shaft or coaxial with the motor shaft, and the impeller group comprises an end cover, a propeller, an impeller and a retaining ring. a first through hole is provided in a center of the end cover; the propeller includes a central shaft, three or more first blades, a first hub and a second hub, and the first blade is disposed on the first hub and the second hub Between the first hub, the first blade, and the second hub, three or more first guide grooves are formed, and a second through hole is formed in the central shaft to cooperate with the impeller shaft, and the pusher passes through the second The through hole is fixed on the impeller shaft; the impeller includes the second blade, the third hub and the fourth hub which are the same number as the first blade, the position of the second blade corresponds to the position of the first blade, and the second blade is placed in the third Between the hub and the fourth hub, a second guide groove having the same number as the first guide groove is formed between the third hub, the second blade, and the fourth hub, and a third through hole is formed at a center of the impeller to cooperate with a central shaft of the propeller; The third hub is supported on the second hub of the propeller, the central shaft of the propeller is pivotally connected in the third through hole of the impeller, the retaining ring is mounted on the outer circumference of the impeller and the propeller, and the end cover is mounted on the impeller; a through hole of the end cover, a first guide groove of the thruster, a second flow guiding groove of the impeller and a retaining ring form a water flow passage of the peripheral seal; an end cover and a thruster between the adjacent two impeller sets are installed at Together, a peripherally sealed water flow path is formed between the impeller sets.

2. A fire water pump according to claim 1, wherein: a first positioning ring is disposed along a direction of the outer periphery of the small end of the first hub of the propeller facing away from the first hub, and the first positioning ring is mounted on the end cover The first through hole is engaged with the first through hole.

3. A fire water pump according to claim 2, wherein: a second positioning ring is disposed along a direction of the large end of the outer periphery of the fourth hub of the impeller toward the small end of the fourth hub, in the second positioning ring A step portion is disposed on the upper side, and an inner periphery of the retaining ring cooperates with an outer periphery of the first step portion.

4. A fire water pump according to claim 3, wherein: the end cover is provided with a third step portion and a fourth step portion, and the outer periphery of the third step portion cooperates with the inner periphery of the retaining ring, The outer periphery of the four step portions cooperates with the inner periphery of the second positioning ring.

5. A fire pump according to claim 4, wherein: the maximum outer diameter of the end cap, the retaining ring and the second retaining ring are equal.

6. The fire water pump according to claim 5, wherein: the number of stages of the impeller group is 30 to 74, and the number of the first blades of the propeller is 3 to 12 .

7. The fire protection system according to claim 6, wherein: the first hub and the second hub of the propeller are in the shape of an opening in the same direction, the first hub is parallel to the second hub; the third of the impeller The hub and the fourth hub are in the same direction of the umbrella shape, the third wheel hub is parallel to the four hubs; a rubber washer is installed between the third through hole of the impeller and the central shaft of the propeller; the maximum of the first hub is greater than the second hub The maximum outer diameter, the maximum outer diameter of the fourth wheel hub is greater than the maximum outer diameter of the third hub, and the second outer diameter of the second hub is substantially the same as the maximum outer diameter of the third hub; the spiral direction of the first vane is opposite to the spiral direction of the second vane.

The fire water pump according to any one of claims 1 to 7, wherein: the pump casing is cylindrical, and the end cover, the propeller, the impeller and the retaining ring are made of stainless steel. The pump casing is cylindrical.

9. A method for moving a fire pump, the fire pump comprising a pump casing, a motor mounted in the pump casing, and a second or more series impeller group mounted in a cylindrical cavity of the pump casing, in the motor and the impeller The water pumping port is arranged on the pump casing between the groups, and the impeller group is coaxially mounted on the impeller shaft in series, and the impeller shaft is fixed on the motor shaft or coaxial with the motor shaft, and the impeller group comprises the following steps: The propeller, the impeller and the end cover are provided with a retaining ring on the circumference of the propeller and the impeller, and a first vane is arranged on the propeller, and the second vane having the same number and position corresponding to the first vane is provided on the impeller The propeller is fixed on the impeller shaft, the impeller is pivotally connected to the impeller shaft, and the end cover passes through the impeller shaft; the movement process during pumping includes the impeller shaft rotating along with the motor shaft, and the impeller shaft driving the propeller fixed on the impeller shaft Rotating, the impeller, the retaining ring and the end cap of the impeller group rotate irregularly under the action of the propeller.

10. A fire protection system comprising a water pump, a water hose and a water gun, the motor of the water pump being electrically connected to an external power source or a generator, characterized in that: the water pump is a submersible pump, the submersible pump comprises a pump casing, a motor installed in the pump casing and the installation a second or more series connected impeller group in a cylindrical cavity of the pump casing, A water inlet is arranged on the pump casing between the motor and the impeller group, and the impeller group is coaxially mounted on the impeller shaft in series, the impeller shaft is fixed on the motor shaft or coaxial with the motor shaft; the submersible pump is installed at one end of the impeller group and water With a connection, the other end of the hose is connected to the water gun.

1 . The fire fighting system according to claim 10, wherein: the impeller group comprises a propeller, an impeller and an end cover which are sequentially installed, and a retaining ring is arranged on a circumference of the propeller and the impeller. The propeller is provided with three or more first vanes, and the impeller is provided with a second vane having the same number and corresponding position as the first vane, the propeller is fixed on the impeller shaft, and the impeller is pivotally connected to the impeller shaft. , the end cap passes through the impeller shaft.

12. A fire fighting system according to claim 11 wherein: the pusher further includes a central shaft, a first hub and a second hub, the first vane being disposed between the first hub and the second hub, Three or more first guide grooves are formed between the hub, the first blade and the second hub, and a second through hole is formed in the central shaft to cooperate with the impeller shaft, and the pusher is fixed through the second through hole The impeller shaft; the impeller further includes a third hub and a fourth hub, the second blade is disposed between the third hub and the fourth hub, and the first guide groove is formed between the third hub, the second blade, and the fourth hub a second guide groove having the same number, a third through hole in the center of the impeller is engaged with the central shaft of the propeller; the third hub of the impeller is supported on the second hub of the propeller, and the central pivot of the propeller Connected in the third through hole of the impeller, the retaining ring is mounted on the outer circumference of the impeller and the propeller, and the end cover is mounted on the impeller; the through hole of the end cover, the first diversion groove of the propeller, and the second guide of the impeller Water flow forming a peripheral seal between the flow cell and the retaining ring The end caps and the thrusters between the adjacent two impeller sets are mounted together, and a peripherally sealed water flow passage is formed between the impeller sets.

13. The fire protection system according to claim 12, wherein: a positioning ring is disposed along a direction of the outer periphery of the small end of the first hub of the propeller facing away from the first hub, and the first positioning ring is mounted on the end cover The first through hole is matched with the first through hole; the second positioning ring is disposed along the large end of the outer periphery of the fourth hub of the impeller toward the small end of the fourth hub, and the second positioning ring is provided on the second positioning ring a step portion, the inner periphery of the retaining ring is engaged with the outer periphery of the first step portion; the end cover is provided with a third step portion and a fourth step portion, and the outer periphery of the third step portion is matched with the inner periphery of the retaining ring, The outer periphery of the fourth step portion cooperates with the inner periphery of the second positioning ring;

14 . The fire protection system according to claim 13 , wherein: the maximum outer diameters of the end cover, the retaining ring and the second positioning ring are equal, and the number of stages of the impeller group is 30 to 74. Advancement The number of the first blades of the device is 3 to 12.

15. A fire protection system according to claim 14, wherein: the first hub and the second hub of the propeller are in the shape of an opening in the same direction, the first hub is parallel to the second hub; the third hub of the impeller And the fourth hub is an umbrella shape with the opening in the same direction, the third hub is parallel to the fourth hub; a rubber washer is installed between the third through hole of the impeller and the central shaft of the propeller; the maximum of the first hub is greater than that of the second hub a maximum outer diameter, a maximum outer diameter of the fourth hub is greater than a maximum outer diameter of the third hub, and a maximum outer diameter of the second hub and the third hub are substantially the same; a spiral direction of the first blade is opposite to a spiral direction of the second blade, and The pump casing is cylindrical.

16. A fire protection system according to any of claims 10 to 15, wherein: said generator is provided with a zero drive variable frequency drive, said generator being separated from the water pump.

17. A fire water tanker comprising the fire protection system of claim 10, comprising a vehicle body, wherein a water storage tank is mounted on the vehicle body, the water pump is placed in the water storage tank, and the pump is installed at one end of the impeller group to expose the water storage The tank is connected to the water hose, and the other end of the water belt is connected with the water gun; the generator is separated from the water pump and installed on the vehicle body, and the zero-drive variable frequency drive is mounted on the motor.