CN106902488A - A kind of device for preparing foam dope automatically by foam powder - Google Patents

Abstract

The invention discloses a device for automatically preparing foam stock solution from foam powder, which comprises a mixing barrel, a foam stock solution storage tank, a foam powder storage tank and a drive platform for driving the foam powder storage tank to lift and rotate. The top is provided with a powder adding hole, the mixing tank is provided with an agitator, and the upper part of the mixing tank is provided with a water inlet, and the lower part is provided with a foam stock solution outlet, and the foam stock solution outlet is connected with a foam stock solution storage tank; The foam powder storage tank includes a tank body, the peripheral side wall of the tank body is divided into a sealing part and an opening part from top to bottom, a fixed sleeve is arranged on the outer periphery of the tank at the sealing part, and a A movable sleeve is arranged on the outer periphery of the tank, and an up and down telescopic structure is formed between the fixed sleeve and the movable sleeve, and the inner diameter of the powder adding hole is between the outer diameter of the tank body and the outer diameter of the movable sleeve between sizes. The invention can realize the automatic preparation of the foam stock solution from the foam powder at the fire scene.

Description

A device for automatically preparing foam stock solution from foam powder

technical field

The invention relates to a device capable of automatically preparing foam stock solution from foam powder at a fire scene, and belongs to the technical field of fire-fighting equipment.

Background technique

Fire-fighting foam liquid, that is, aqueous film-forming foam fire extinguishing agent, also known as light water foam fire extinguishing agent, also known as foam liquid, foam stock liquid or foam concentrate, is usually composed of foam powder (composed of surfactants and additives to improve foam performance) and made with water.

The use of foam fire extinguishing agent for fire extinguishing has the advantages of cleanness, environmental protection, and convenient use. For example, it is non-toxic, tasteless, and dust-free when extinguishing fires. It will not cause secondary pollution to the environment and will not damage the ozone layer of the atmosphere; it can be used to extinguish Class A fires. , such as the fire caused by the burning of solid substances such as wood and cotton cloth; it is most suitable for fighting Class B fires, such as gasoline, diesel and other liquid fires. The water film with good resistance can isolate the contact between fuel and air. With the double function of foam and protective film, it can quickly and efficiently extinguish oil fires; the water mist sprayed during the fire extinguishing process has high visibility and can reduce the fire scene. The smoke content and toxicity in it are beneficial to the evacuation of personnel and firefighters to extinguish the fire, and it is convenient and safe to use.

With the rapid development of social economy and the acceleration of industrialization and urbanization, fire hazards and disaster-causing factors are constantly deriving, especially inflammable and explosive units, high-rise buildings, underground projects, high-density and large-space public gathering places, These public gathering places, oil storage places, virgin forests, etc. are prone to large-scale fires. Once a fire breaks out, firefighters need to spray compressed air foam for a long time to extinguish the fire. And the method that realizes foam fire extinguishing at present is to use a fire truck to carry a certain amount of foam stock solution, and then is mixed with compressed air foam at the scene of a fire and carries out spray fire extinguishing. Due to the limited volume of the fire truck, the foam stock solution takes up a large volume, so that the amount of foam stock solution that the fire truck can carry is limited, which cannot meet the long-term fire extinguishing requirements, thus affecting the timely fire extinguishing effect. Therefore, there is an urgent need in the art for a device that can automatically prepare foam stock solution from foam powder at the scene of a fire, so as to meet the needs of various fire extinguishers for the amount of foam stock solution, and can fully exert the foam fire extinguishing effect, but so far no related technology or Product reports.

Contents of the invention

In view of the above-mentioned problems and demands in the prior art, the purpose of the present invention is to provide a device that can automatically prepare foam stock solution from foam powder at the fire scene, so as to meet the demand for the amount of foam stock solution for various fire extinguishing.

To achieve the above object, the present invention adopts the following technical solutions:

A device for automatically preparing foam stock solution from foam powder, comprising a mixing barrel and a foam stock solution storage tank, the top of the mixing barrel is provided with a powder feeding hole, the mixing barrel is provided with an agitator, and the upper part of the mixing barrel A water inlet is provided, and a foam stock solution outlet is provided at the lower part, and the foam stock solution outlet is connected with the foam stock solution storage tank; it is characterized in that it also includes a foam powder storage tank and a drive platform for driving the foam powder storage tank to lift and rotate, The foam powder storage tank includes a tank body, and the peripheral side wall of the tank body is divided into a sealing part and an opening part from top to bottom. The outer periphery of the tank is provided with a movable sleeve, and an up and down telescopic structure is formed between the fixed sleeve and the movable sleeve, and the inner diameter of the powder adding hole is between the outer diameter of the tank body and the outer diameter of the movable sleeve. diameter size.

One embodiment, the tank body is in the shape of a cylinder, the inner diameter of the movable sleeve is adapted to the outer diameter of the tank body, the inner diameter of the fixed sleeve is larger than the outer diameter of the movable sleeve, and the movable sleeve The sleeve can move up and down in the cavity between the fixed sleeve and the tank body.

In a further embodiment, the upper and lower ends of the fixed sleeve are provided with inner extension steps, the upper end of the movable sleeve is provided with an extension limit step, and the inner extension steps provided at the upper end of the fixed sleeve are fixedly connected with the tank body, The outer limit step set on the upper end of the movable sleeve and the inner step set on the lower end of the fixed sleeve can form a snap connection, and the top of the outer limit step and the inner step set on the upper end of the fixed sleeve A telescopic spring is fixed between the bottoms of the steps.

One embodiment, the drive platform includes a turntable support frame, a transmission shaft, a lifting drive mechanism and a rotation drive mechanism, the turntable support frame is fixedly connected to the upper end of the transmission shaft, and the lift drive mechanism and the rotation drive mechanism are connected to the transmission Shaft transmission connection, the foam powder storage tank is fixed on the turntable support frame.

In a further embodiment, the lifting drive mechanism includes a lifting drive motor, a transmission gear and a transmission rack, the lifting drive motor is in transmission connection with the transmission gear, the transmission gear is meshed with the transmission rack, and the transmission rack is set on the hub of the drive shaft.

In a further embodiment, the shaft sleeve of the transmission shaft is sleeved on the transmission shaft, and is fixedly connected with the transmission shaft through lock nuts arranged at the upper and lower ends of the shaft sleeve.

In a further embodiment, the rotary drive mechanism includes a rotary drive motor, an optical shaft, a driving pulley, a driven pulley, and a transmission belt, the rotary drive motor is connected to the optical shaft, and a driving belt is sleeved on the optical shaft The driven pulley is sleeved on the lower end of the transmission shaft, and the driven pulley is connected with the driven pulley through a transmission belt.

In a further embodiment, the rotary drive motor is connected to the optical shaft through a coupling, the driving pulley is sleeved on the optical shaft through a key connection, and the driven pulley is sleeved on the transmission shaft through a straight tooth meshing connection. the lower end.

As a preferred solution, electromagnetic valves are provided at the water inlet of the mixing tank and at the outlet of the foam stock solution.

As a preferred solution, a low liquid level sensor A and a high liquid level sensor A are provided in the mixing tank, and a low liquid level sensor B and a high liquid level sensor B are provided in the foam stock solution storage tank.

As a further preferred solution, the device also includes a control unit, the control unit is connected with the low liquid level sensor A, the high liquid level sensor A, the low liquid level sensor B, the high liquid level sensor B, the solenoid valve, the agitator, the lifting drive The motor and the rotary drive motor are all connected to realize fully automatic preparation.

As a further preferred solution, a matching hole cover is provided on the powder adding hole, and the hole cover is connected to the top of the mixing bucket through a return spring.

As a further preferred solution, the powder feeding hole is set at a position deviated from the stirring shaft and close to the water inlet.

Compared with the prior art, the present invention has the following beneficial effects:

By using the device provided by the present invention, the foam stock solution can be automatically prepared from the foam powder at the fire scene, which can provide sufficient foam stock solution for foam fire extinguishing and meet the fire extinguishing requirements of various fires; the key is that the fire truck carries solid foam powder than Carrying foam stock solution is more convenient, saves space and carries a more sufficient amount; therefore, compared with the prior art, the present invention can meet various fire extinguishing requirements for foam stock solution, can fully exert the foam fire extinguishing effect, and has a significant improvement and application value.

Description of drawings

Fig. 1 is the structural representation of a kind of device that automatically prepares foam stock solution by foam powder provided by the embodiment of the present invention;

Fig. 2 is the structural representation of the foam powder storage tank that the embodiment of the present invention provides;

Fig. 3 is a partial structural schematic diagram of the drive platform provided by the embodiment of the present invention;

Fig. 4 is a schematic diagram of the spur meshing connection structure between the driven pulley and the transmission shaft provided by the embodiment of the present invention;

Fig. 5 is a functional block diagram of a control unit provided by an embodiment of the present invention.

The symbols in the figure are as follows: 1. Mixing barrel; 11. Powder filling hole; 12. Agitator; 13. Water inlet; 14. Foam stock solution outlet; 15. Solenoid valve; 16. Low liquid level sensor A; 17. High liquid level sensor Level sensor A; 18, hole cover; 19, return spring; 2, foam stock solution storage tank; 21, low liquid level sensor B; 22, high liquid level sensor B; 3, foam powder storage tank; 31, tank body; 311 , sealing part; 312, opening part; 32, fixed sleeve; 321, inner extension step at the upper end; 322, inner extension step at the lower end; 33, movable sleeve; 331, extension limit step; 34, cavity; 35, Telescopic spring; 4, driving platform; 41, turntable support frame; 42, transmission shaft; 43, lifting drive mechanism; 431, lifting drive motor; 432, transmission gear; 433, transmission rack; 44, rotating drive mechanism; 441, Rotary drive motor; 442, optical shaft; 443, driving pulley; 444, driven pulley; 445, transmission belt; 45, shaft sleeve; 46, lock nut; 5, control unit.

detailed description

The technical solution of the present invention will be described in further detail below through embodiments and in conjunction with the accompanying drawings.

Example

Please combine Fig. 1 and Fig. 2 and show: a kind of device that present embodiment provides by foam powder automatically prepares foam stock solution, comprises mixing tank 1, foam stock solution storage tank 2, foam powder storage tank 3 and is used to drive foam powder storage The driving platform 4 for lifting and rotating the tank 3, the top of the mixing bucket 1 is provided with a powder feeding hole 11, the inside of the mixing bucket 1 is provided with an agitator 12, and the upper part of the mixing bucket 1 is provided with a water inlet 13, The bottom is provided with foam stock solution outlet 14, and described foam stock solution outlet 14 is connected with foam stock solution storage tank 2; Described foam powder storage tank 3 comprises tank body 31, and the peripheral side wall of described tank body 31 is divided into from top to bottom The sealing part 311 and the opening part 312 are provided with a fixed sleeve 32 at the outer periphery of the tank at the sealing part 311, and a movable sleeve 33 is arranged at the outer periphery of the tank at the opening part 312, and the fixed sleeve 32 and The movable sleeves 33 form an up and down telescopic structure, and the inner diameter of the powder feeding hole 11 is between the outer diameter of the tank body 31 and the outer diameter of the movable sleeve 33 .

In this embodiment, the tank body 31 is in the shape of a cylinder, the inner diameter of the movable sleeve 33 matches the outer diameter of the tank body 31, and the inner diameter of the fixed sleeve 32 is larger than the outer diameter of the movable sleeve 33 , and the movable sleeve 33 can move up and down in the cavity 34 between the fixed sleeve 32 and the tank body 31 . The upper end of the fixed sleeve 32 is provided with an inner step 321, the lower end of the fixed sleeve 32 is provided with an inner step 322, the upper end of the movable sleeve 33 is provided with an outer limit step 331, and the fixed sleeve The inner extension step 321 set at the upper end is fixedly connected with the tank body 31, the outer extension limit step 331 set at the upper end of the movable sleeve and the inner extension step 322 set at the lower end of the fixed sleeve can form a snap connection for engaging, and, in A telescopic spring 35 is fixed between the top of the outer limit step 331 and the bottom of the inner step 321 provided on the upper end of the fixing sleeve (please refer to FIG. 2 ).

Please refer to Fig. 3 and Fig. 4: in this embodiment, the drive platform 4 includes a turntable support frame 41, a transmission shaft 42, a lifting drive mechanism 43 and a rotation drive mechanism 44, and the turntable support frame 41 and the transmission shaft 42 The upper end is fixedly connected, the lifting drive mechanism 43 and the rotating drive mechanism 44 are all connected with the transmission shaft 42, and the foam powder storage tank 3 is fixed on the turntable support frame 41.

The lift drive mechanism 43 includes a lift drive motor 431, a transmission gear 432 and a transmission rack 433, the lift drive motor 431 is in transmission connection with the transmission gear 432, and the transmission gear 432 is meshed with the transmission rack 433. The transmission rack 433 is arranged on the shaft sleeve 45 of the transmission shaft 42, and the shaft sleeve 45 is sleeved on the transmission shaft 42, and is fixedly connected with the transmission shaft 42 through the locking nuts 46 arranged on the upper and lower ends of the shaft sleeve 45 . Drive the transmission gear 432 to rotate through the lifting drive motor 431. Due to the meshing structure of the rack and pinion, the rotating motion will become an up and down translation motion, thereby driving the shaft sleeve 45 to move up and down. Because the shaft sleeve 45 is fixed in place by the lock nut 46 on the transmission shaft 42, thereby driving the transmission shaft 42 to move up and down, and then the turntable support frame 41 fixed on the transmission shaft 42 upper end is moved up and down, so as to realize the foam powder storage tank 3 fixed on the turntable support frame 41 to generate Move up and down.

The rotary drive mechanism 44 includes a rotary drive motor 441, an optical shaft 442, a driving pulley 443, a driven pulley 444, and a transmission belt 445. The rotary drive motor 441 is connected to the optical shaft 442, and The driving pulley 443 is sleeved, and the driven pulley 444 is sleeved on the lower end of the transmission shaft 42 , and the driving pulley 443 and the driven pulley 444 are connected through a transmission belt 445 . The rotary driving motor 441 is connected to the optical shaft 442 through a coupling, the driving pulley 443 is sleeved on the optical shaft 442 through a key connection, and the driven pulley 444 is sleeved on the transmission shaft through a straight tooth meshing connection. The lower end of the shaft 42. Drive the optical shaft 442 to rotate by rotating the driving motor 441, the optical shaft 442 drives the driving pulley 443 to rotate, the driving pulley 443 drives the driven pulley 444 to rotate through the transmission belt 445, and the driven pulley 444 thus drives the transmission shaft 42 to rotate, And then drive the rotation of the turntable support frame 41 that is fixed on the transmission shaft 42 upper end, thus can realize that the foam powder storage tank 3 that is fixed on the turntable support frame 41 rotates and shifts.

Considering the accuracy of transmission, the transmission belt 445 is preferably a synchronous toothed belt. In order to ensure that the transmission shaft 42 can move axially relative to the driven pulley 444 when the transmission shaft is moving up and down, the lower section of the transmission shaft 42 is provided with straight teeth, which mesh with the driven pulley 444 through the straight teeth. connected.

The using method of the device for automatically preparing foam stock solution from foam powder described in this embodiment is as follows:

First according to the foam powder required for preparing the foam stock solution and the volume of water and the volume size of the mixing tank 1, the foam powder of the required amount is filled in the foam powder storage tank 3; the foam powder storage tank 3 can be configured in multiples to Meet the preparation needs of sufficient foam stock solution. Because in the natural state, the movable sleeve 33 is in a protruding state, and is closely fitted with the tank body of the opening 312; in order to ensure that the foam powder in the tank 31 will not leak from the opening 312 before preparation, the movable The sleeve 33 is higher than the height of the tank body of the opening portion 312 so as to cover all the openings (please refer to FIG. 2 ).

Then one or more foam powder storage tanks 3 containing the required quantitative foam powder are fixedly connected to the turntable support frame 41, and then drive the turntable support frame 41 to ascend by the lifting drive mechanism 43. When the foam powder storage tank 3 on the frame 41 is higher than the top of the mixing bucket 1, stop the rising motion, and then drive the turntable support frame 41 to rotate by the rotary drive mechanism 44, so that a foam powder storage tank fixed on the turntable support frame 41 3 Rotate until it is just above the powder filling hole 11, and then drive the turntable support frame 41 to move down through the lifting drive mechanism 43, because the inner diameter of the powder filling hole 11 is between the outer diameter of the tank body 31 and the movable sleeve Between the outer diameters of the barrel 33, that is to say, the movable sleeve 33 cannot fall into the powder filling hole 11, and the tank body 31 can fall into the powder filling hole 11. Therefore, when the bottom of the foam powder storage tank 3 When it conflicts with the top of the mixing barrel 1, the movable sleeve 33 will shrink upwards into the cavity 34 between the fixed sleeve 32 and the tank body 31 under the action of the resisting force on the top of the mixing barrel 1, so that the opening The tank body of the hole portion 312 falls into the powder filling hole 11. When the opening portion 312 falls into the powder filling hole 11 completely, the decline is stopped, and the water inlet 13 is opened to allow the inflowing water to wash the opening portion 312, thereby making the foam powder The foam powder in the storage tank 3 is washed into the mixing tank 1 by the water flow. When the liquid level in the mixing tank 1 reaches the high level line, stop adding water, start the agitator 12 in the mixing tank 1 to stir and mix for a certain period of time, and the process is completed. Preparation of a batch of foam stock solution; when the foam stock solution storage tank 2 needs to add foam stock solution, the switch of the foam stock solution outlet 14 can be turned on, so that the foam stock solution prepared in the mixing tank 1 flows into the foam stock solution storage tank 2. When it is necessary to continue to prepare a new batch of foam stock solution, the empty foam powder storage tank 3 used in the previous batch can be raised and rotated to move away from the mixing barrel 1 through the driving platform 4, so that a new one can hold the required quantitative foam The powdered foam powder storage tank 3 is moved into the powder filling hole 11 of the mixing barrel, and then the above preparation operation is repeated, so as to provide a steady stream of foam stock solution for the fire scene, fully meet the foam fire extinguishing demand, and achieve the best fire extinguishing effect.

In addition, when the foam powder storage tank 3 moves upwards and moves away from the mixing barrel, the movable sleeve 33 protrudes downwards under the reset force of the telescopic spring 35, thereby returning to the original natural protruding state, which is consistent with the opening portion 312. The tank fits snugly.

In order to avoid that the tank body 31 falling into the powder feeding hole 11 does not affect the simultaneous stirring work of the agitator 12 located in the mixing barrel 1, it is better to make the powder feeding hole 11 be arranged at a position deviated from the stirring shaft and close to the water inlet 13.

In order to better realize fully automatic preparation, the solenoid valve 15 for controlling the switching action can be set at the water inlet 13 of the mixing tank and the foam stock solution outlet 14; the low liquid level sensor A 16 and the high liquid level Sensor A 17, a low liquid level sensor B 21 and a high liquid level sensor B 22 are set in the foam stock solution storage tank 2 (see also shown in Figure 1); a control unit 5 is set at the same time, and the control unit 5 is connected to the low liquid level sensor A 16, high liquid level sensor A 17, low liquid level sensor B21, high liquid level sensor B 22, solenoid valve 15, agitator 12, lift drive motor 431, and rotation drive motor 441 are all connected in phase (see Figure 5 ), the liquid level information in the foam stock solution storage tank 2 is collected by the control unit 5, thereby timely controlling the opening and closing of the electromagnetic valve 15 located at the foam stock solution outlet 14, and adding an appropriate amount of foam stock solution in time for the foam stock solution storage tank 2; In addition, through the collection of liquid level information in the mixing tank 1 by the control unit 5, the start and end timing of the preparation of the foam stock solution can be controlled in time.

In order to prevent foreign objects from falling into the powder-filling hole 11, it is preferable to set a matching hole cover 18 on the powder-filling hole 11 (that is, the outer diameter of the hole cover 18 is compatible with the inner diameter of the powder-filling hole 11, In order to facilitate the hole cover 18 to fall into the powder-filling hole 11 under the downward resistance of the tank body 31 to open the powder-filling hole 11 so that the tank body 31 can also fall into the powder-filling hole 11), when the hole cover 18 is connected to the top of the mixing barrel 1 through the return spring 19, so that the tank body 31 can be easily and automatically pressed against the hole cover 18 to enter the powder feeding hole 11. When the tank body 31 moves away from the powder feeding hole 11, the hole The cover 18 can reset automatically under the restoring force of the return spring 19 .

Finally, it is necessary to point out that: the above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person familiar with the technical field can understand the technical scope disclosed in the present invention. Any easily conceivable changes or substitutions within the scope of the present invention shall be covered within the protection scope of the present invention.

Claims (10)

1. A device for automatically preparing foam stock solution from foam powder, comprising a mixing bucket and a foam stock solution storage tank, the top of the mixing bucket is provided with a powder-adding hole, the mixing bucket is provided with an agitator, and the mixing bucket The upper part is provided with a water inlet, and the lower part is provided with a foam stock solution outlet, and the foam stock solution outlet is connected with the foam stock solution storage tank; it is characterized in that it also includes a foam powder storage tank and a drive for driving the foam powder storage tank to lift and rotate Platform, the foam powder storage tank includes a tank body, the peripheral side wall of the tank body is divided into a closed part and an open part from top to bottom, a fixed sleeve is arranged on the outer periphery of the tank at the closed part, and a fixed sleeve is arranged at the open part. The outer periphery of the tank of the hole is provided with a movable sleeve, and an up and down telescopic structure is formed between the fixed sleeve and the movable sleeve, and the inner diameter of the powder adding hole is between the outer diameter of the tank body and the movable sleeve. between the outer diameter dimensions. 2. The device according to claim 1, characterized in that: the tank body is cylindrical, the inner diameter of the movable sleeve matches the outer diameter of the tank body, and the inner diameter of the fixed sleeve is larger than the movable sleeve. The outer diameter of the sleeve, and the movable sleeve can move up and down in the cavity between the fixed sleeve and the tank body. 3. The device according to claim 1 or 2, characterized in that: the upper and lower ends of the fixed sleeve are provided with inner steps, the upper end of the movable sleeve is provided with outer limit steps, and the fixed sleeve The inner extension step set at the upper end is fixedly connected with the tank body, and the outer extension limit step set at the upper end of the movable sleeve and the inner extension step set at the lower end of the fixed sleeve can form a snap joint engaged with each other. A telescopic spring is fixed between the top of the step and the bottom of the inner step provided on the upper end of the fixed sleeve. 4. The device according to claim 1, wherein the driving platform comprises a turntable support frame, a transmission shaft, a lifting drive mechanism and a rotation drive mechanism, the turntable support frame is fixedly connected to the upper end of the transmission shaft, and the Both the lifting drive mechanism and the rotation drive mechanism are connected with the transmission shaft, and the foam powder storage tank is fixed on the support frame of the turntable. 5. The device according to claim 4, characterized in that: the lifting drive mechanism includes a lifting drive motor, a transmission gear and a transmission rack, the lifting drive motor is in transmission connection with the transmission gear, and the transmission gear is connected to the transmission gear The bars are meshed and connected, and the transmission rack is arranged on the shaft sleeve of the transmission shaft. 6. The device according to claim 5, characterized in that: the shaft sleeve of the transmission shaft is sleeved on the transmission shaft, and is fixedly connected with the transmission shaft through lock nuts arranged at the upper and lower ends of the shaft sleeve. 7. The device according to claim 1, characterized in that: the rotary drive mechanism comprises a rotary drive motor, an optical shaft, a driving pulley, a driven pulley, and a transmission belt, and the rotary drive motor is connected to the optical shaft in transmission, A driving pulley is sleeved on the optical axis, and the driven pulley is sleeved on the lower end of the transmission shaft, and the driving pulley and the driven pulley are connected through a transmission belt. 8. The device according to claim 1, characterized in that: electromagnetic valves are provided at the water inlet of the mixing tank and at the outlet of the foam stock solution, and a low liquid level sensor A and a high liquid level sensor A are arranged in the mixing tank , There is a low liquid level sensor B and a high liquid level sensor B in the foam stock solution storage tank. 9. The device according to claim 1, characterized in that: a matching hole cover is provided on the powder feeding hole, and the hole cover is connected to the top of the mixing bucket through a return spring. 10. The device according to claim 9, characterized in that: the outer diameter of the hole cover matches the inner diameter of the powder filling hole.