CN110748481A - Foam pump for fire control - Google Patents

Abstract

The invention discloses a foam pump for fire fighting, comprising a motor, a suction chamber, a sealing chamber and a discharge chamber. The suction chamber is arranged on one side of the sealing chamber, and the discharge chamber is arranged on the other side of the sealing chamber. A bearing cover is installed at one end, a packing gland is installed inside the suction chamber, the output end of the motor runs through the bearing cover and extends to the inside of the suction chamber and is connected with a transmission shaft, and one end of the transmission shaft penetrates the packing gland and is connected by a coupling There is an intermediate shaft, the number of the couplings is two, the other end of the transmission shaft is connected with a rotor through another coupling, and a stator is sleeved outside the rotor. The invention connects the transmission shaft and the rotor together through the intermediate shaft with the helical liquid feeding piece, so that the transmission shaft and the rotor can rotate synchronously, so as to achieve the purpose of effectively conveying the B-type foam. Wear and tear, improve the service life of the foam pump for fire fighting. Suitable for foam pumps.

Description

A fire-fighting foam pump

technical field

The invention relates to the technical field of foam pumps, in particular to a foam pump for fire fighting.

Background technique

The foam pump is a device installed in a fire truck or other fire fighting equipment, and it is a special pump used to transport foam stock solution or other fire extinguishing liquids. The special fire-extinguishing foam is transported by the foam pump and mixed with water and air to form a special fire-extinguishing foam, which is covered on the combustible material to achieve rapid fire-extinguishing effect.

At present, most of the foam pumps used in domestically developed fire trucks are plunger pumps and vane pumps. The plunger pump is a positive displacement pump, which relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working cavity. The vane pump also belongs to the positive displacement pump, which works through the change of the working volume formed by the inner surface of the vane, the rotor and the stator. Piston pumps and vane pumps are simple to manufacture and easy to work, and are the choices of most domestic companies.

The above two kinds of foam pumps have good performance when conveying Class A foam liquid and water. However, when the working temperature is low, the B-type foam liquid is transported or the B-type foam liquid is not cleaned in time, which will cause the B-type foam to stick to the internal structure, which is easy to block and reduce the conveying efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a foam pump for fire fighting to achieve the purpose of improving efficiency.

In order to achieve the above purpose, the present invention provides the following technical solutions: a foam pump for fire fighting, comprising a motor, a suction chamber, a sealing chamber and a discharge chamber, the suction chamber is arranged on one side of the sealing chamber, and the associated discharge chamber is arranged on the sealing chamber On the other side, a bearing cover is installed at one end of the suction chamber, a packing gland is installed inside the suction chamber, a bearing cover is inserted through the output end of the motor, and a transmission shaft is connected to the interior of the suction chamber, and one end of the transmission shaft penetrates through the suction chamber. The packing gland is connected with an intermediate shaft through a coupling, the number of which is two, the other end of the intermediate shaft is connected with a rotor through another coupling, and a stator is sleeved outside the rotor.

Preferably, the top of the suction chamber is provided with a liquid inlet, and the liquid inlet is inclined.

Preferably, a screw liquid inlet sheet is connected to the outside of the intermediate shaft.

Preferably, the suction chamber is divided into a left suction chamber and a right suction chamber.

Preferably, the drive shaft and the packing gland are located in the right suction chamber.

Preferably, the intermediate shaft and the two couplings are located in the left suction chamber.

Preferably, the liquid inlet is located above the left suction chamber, and the inclination angle of the liquid inlet is fifteen degrees to seventy-five degrees.

Preferably, both the rotor and the stator are located inside the sealed cavity.

Preferably, the spiral liquid inlet sheet is arranged in an arc shape.

The invention provides a foam pump for fire fighting. Has the following beneficial effects:

(1) In the present invention, the transmission shaft and the rotor are connected together by an intermediate shaft with a spiral liquid feeding piece, so that the transmission shaft and the rotor can rotate synchronously, so as to achieve the purpose of effectively conveying the B-type foam, and also make the internal structure work more efficiently. Stable, not easy to wear, improve the service life of the foam pump for fire fighting.

(2) The present invention has the characteristics of lightness, compactness, low cost, easy assembly and maintenance, etc., and is suitable for use in fire fighting, chemical industry, energy, papermaking and food. It is not only limited to pumping B-type foam, but also can transport a variety of liquids containing granular substances and fibers with a kinematic viscosity not higher than 4.62*10^6 (mm^2/s). The advantages are quantitative delivery and adjustment. Convenient and minimal pulsation.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the front view structure schematic diagram of the intermediate shaft;

Fig. 3 is the side view structure schematic diagram of the intermediate shaft;

FIG. 4 is a schematic diagram of the 45° axial side structure of the intermediate shaft.

In the picture: 1 discharge chamber, 2 rotor, 3 stator, 4 coupling, 5 liquid inlet, 6 intermediate shaft, 7 packing gland, 8 transmission shaft, 9 bearing cover, 10 motor.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

As shown in FIG. 1 , this embodiment provides a foam pump for fire protection, including a motor 10, a suction chamber, a sealing chamber and a discharge chamber 1. The suction chamber is arranged on one side of the sealing chamber, and the associated discharge chamber 1 is arranged on the sealing chamber. On the other side, a bearing cover 9 is fixedly installed at one end of the suction chamber, a packing gland 7 is fixedly installed inside the suction chamber, and a bearing cover 9 extends through the output end of the motor 10 and extends to the interior of the suction chamber, and a transmission shaft 8 is fixedly connected, and one end of the transmission shaft 8 is fixedly connected. Through the packing gland 7, an intermediate shaft 6 is fixedly connected through the coupling 4, and the outer part of the intermediate shaft 6 is fixedly connected with a screw liquid feeding piece, and the screw liquid feeding piece is arranged in an arc shape. The number of the coupling 4 is two, and the intermediate shaft 6 The other end is fixedly connected to the rotor 2 through another coupling 4. The rotor 2 is sleeved with a stator 3. Both the rotor 2 and the stator 3 are located inside the sealed cavity. The top of the suction chamber is provided with a liquid inlet 5, and the liquid inlet 5 is inclined. Setting, the suction chamber is divided into the left suction chamber and the right suction chamber, the transmission shaft 8 and the packing gland 7 are located in the right suction chamber, the intermediate shaft 6 and the two couplings 4 are located in the left suction chamber, and the liquid inlet 5 is located at the left suction chamber. Above the chamber, the inclination angle of the liquid inlet 5 is fifteen degrees to seventy-five degrees. Synchronous rotation can achieve the purpose of effectively conveying B-type foam. In addition, it also makes the internal structure work more smoothly, is not easy to wear, and improves the service life of the fire-fighting foam pump. The structure of the intermediate shaft 6 of the liquid sheet is because the existing foam pump transports the B-type foam liquid when the working temperature is low or the B-type foam liquid is not cleaned in time and is prone to blockage, and the fire-fighting foam pump is due to the rotor-lining The combination is less sensitive to the foam viscosity, so it has better performance when conveying the B-type foam with higher viscosity. Considering the influence of low temperature on the viscosity of the B-type foam liquid, the liquid inlet with a certain inclined angle and the screw liquid inlet sheet are used. The intermediate shaft structure makes the B-type foam liquid cut and stirred by the helical liquid inlet sheet before entering the suction cavity, and provides a forward thrust of the screw, which is convenient for the B-type foam liquid to be transported. It is lightweight, compact, low-cost, easy to assemble and maintain. And other characteristics, suitable for fire fighting, chemical, energy, paper, food use. It is not only limited to pumping B-type foam, but also can transport a variety of liquids containing granular substances and fibers with a kinematic viscosity not higher than 4.62*10^6 (mm^2/s). The advantages are quantitative delivery and adjustment. Convenient and minimal pulsation.

In use, when the motor 10 is started, the transmission shaft 8 connected to the motor 10 starts to rotate, and the intermediate shaft 6 with the helical liquid feeding sheet and the rotor 2 rotate synchronously through the coupling 4 . The rotor 2 rotates eccentrically inside the stator 3, and a vacuum is formed inside the suction chamber. The foam liquid enters the suction chamber from the inclined liquid inlet 5, and the spiral liquid inlet plate cuts and stirs the foam at a high speed. Finally, the foam passes through the intermediate shaft 6 and reaches the sealing chamber. , which are continuously and uniformly transported to the discharge chamber 1.

To sum up, in the present invention, the transmission shaft 8 and the rotor 2 are connected together by the intermediate shaft 6 with the screw liquid inlet piece, so that the transmission shaft 8 and the rotor 2 can be rotated synchronously, and the purpose of effectively conveying the B-type foam is achieved. It makes the operation of the internal structure more stable, not easy to wear, and improves the service life of the foam pump for fire fighting.

It has the characteristics of lightness, compactness, low cost, easy assembly and maintenance, etc. It is suitable for fire fighting, chemical industry, energy, papermaking and food. It is not only limited to pumping B-type foam, but also can transport a variety of liquids containing granular substances and fibers with a kinematic viscosity not higher than 4.62*10^6 (mm^2/s). The advantages are quantitative delivery and adjustment. Convenient and minimal pulsation.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (9)

1. A foam pump for fire fighting, comprising a motor (10), a suction chamber, a sealed cavity and a discharge chamber (1), characterized in that: the suction chamber is provided on one side of the sealed cavity, and the discharge chamber (1) is provided with On the other side of the sealing chamber, a bearing cover (9) is installed at one end of the suction chamber, a packing gland (7) is installed inside the suction chamber, and a bearing cover (9) extends through the output end of the motor (10). A transmission shaft (8) is connected to the interior of the suction chamber, and one end of the transmission shaft (8) penetrates the packing gland (7) and is connected to an intermediate shaft (6) through a coupling (4), and the coupling (4) The number of the rotor (2) is two, the other end of the intermediate shaft (6) is connected with a rotor (2) through another coupling (4), and a stator (3) is sleeved outside the rotor (2). 2 . The fire-fighting foam pump according to claim 1 , wherein a liquid inlet ( 5 ) is opened on the top of the suction chamber, and the liquid inlet ( 5 ) is inclined. 3 . 3 . The foam pump for fire fighting according to claim 1 , characterized in that: the intermediate shaft ( 6 ) is externally connected with a screw liquid inlet sheet. 4 . 4 . The foam pump for fire fighting according to claim 2 , wherein the suction chamber is divided into a left suction chamber and a right suction chamber. 5 . 5. A fire-fighting foam pump according to claim 4, characterized in that: the drive shaft (8) and the packing gland (7) are located in the right suction chamber. 6 . The foam pump for fire fighting according to claim 4 , wherein the intermediate shaft ( 6 ) and the two couplings ( 4 ) are located in the left suction chamber. 7 . 7. A fire-fighting foam pump according to claim 4, characterized in that: the liquid inlet (5) is located above the left suction chamber, and the inclination angle of the liquid inlet (5) is fifteen degrees - seven Fifteen degrees. 8 . The foam pump for fire fighting according to claim 1 , wherein the rotor ( 2 ) and the stator ( 3 ) are both located inside the sealed cavity. 9 . 9 . The foam pump for fire fighting according to claim 3 , wherein the screw liquid inlet sheet is arranged in an arc shape. 10 .

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