TECHNICAL FIELD

The invention , generally speaking , belongs to the field of applied electrical engineering, that is, the field of electrical machines, therefore the subject of the invention also extends into the field of construction, regarding also, mechanical engineering.

TECHNICAL PROBLEM

The technical problem that is solved by the present invention consists of the following: Filling the suction hose or pipe of an electric or motor pump with water through the water filling hole without a non-return valve at the beginning of the suction hose or pipe that is immersed in the well. By using a rubber balloon at the beginning of the pipe or suction hose, the non-return valve is changed once and thus the dimensions of the construction are reduced, as well as the application of the subject invention in some cases increases the flow of the pump.

TECHNICAL BACKGROUND

A centrifugal pump, depending on the design, either has a self-priming of a few centimeters or none at all. In order for the pump to be able to draw water from the maximum depth of the factory-declared suction, usually 8-10 m and less, the entire system, the pump and the suction hose must be filled with water before putting the pump into operation.

A well- known system includes a centrifugal pump, a suction hose and a non-return valve at the beginning of the suction hose. The elimination of air from the system is done by pouring water into the system through the filling hole on the pump itself. Water is poured into the pump and suction hose with the help of a funnel into the opening for pouring, which is usually closed with a screw.

A system that includes a hand pump is also known. The pump is connected to the three way connector located on the pipe of the hand pump via the non-return valve. Putting the pump into operation requires first that the hand pump draws water with its vacuum and then that the motor or electric pump is filled with water together with the suction pipe to the non-return valve. Water is poured into the pump and the suction pipe with the help of a funnel into the opening for pouring, which is usually closed with a screw.

Unlike the centrifugal pump, which does not have self-priming, the self-priming diaphragm pump has a self-priming of several meters, usually 2 m . For a given height, the diaphragm pump can draw water even without a non-return valve by creating a vacuum. By adding of the non-return valve at the beginning of the suction hose or suction pipe, the diaphragm pump can draw water from a depth of 8- 10 m .

In general, when the pump draws water from a certain depth, a non-return valve is necessary before the pump on the suction hose. The function of the non-return valve is when filling with water so that the water used to fill the pump and the suction hose does not fall into the well.

The invention resulted as an upgrade and improvement of the author's application "PROCEDURE FOR FILLING THE PLASTIC FLEXIBLE SUCTION HOSE OF A SELF- SUCTION DIAPHRAGM PUMP" recognized by the Intellectual Property Office of the Republic of Serbia (2014/340 RS No 55013) and WO/215/199569 .

SUMMARY OF INVENTION

In certain technical situations, it is necessary to pump the water through a hose with a non-return valve at the beginning. Quite often, the pump is installed next to a plunge pipe of a smaller section, usually it is a pipe from a hand pump. There is a water well under the broken pipe. Pushing the suction hose with the non-return valve is possible only if the non-return valve is of small dimensions. The small dimensions of the non-return valve are a bottleneck for the system, so there is a significant reduction in the flow of the system. For most pumps, this type of construction is unsuitable due to the size of the non-return valve.

In order for the pump to work, the entire system must be full of water. It is necessary to fill the pump and the suction hose with water without the water falling into the well. The non-return valve can also be installed behind the pump. The function of the non-return valve installed in this way is to release water from the pump in the flow direction when the pump is working, that is, to create a vacuum in the non-return direction so that the water does not fall into the well when the pump is not working. So, with this construction, when the check valve is behind the pump, the pump draws water when it is working and the water from the pump cannot fall into the well when the pump is not working. It is necessary to fill the system with water only the first time.

By adding a rubber balloon to the beginning of the suction hose, so that the suction hose enters the balloon and the balloon wraps around the inlet of the hose, the water would not be able to leak when filling the pump and suction hose. It is necessary to fix the balloon to the suction hose and it is easiest to do this with a plastic adhesive tape or a rubber band. When the system is first mounted(installed) and lowered into the well, the water from the pump and the suction hose cannot fall into the well because there is a robber balloon at the beginning of the suction hose. The pump is filled through the filling hole on the pump. When we filled the pump, the water from the well to the top of the pump was only separated at the beginning of the suction hose by a balloon. As the pump is at some height above the well, due to the weight of the water and the pressure the balloon is slightly protruding towards the well. By starting the pump, the balloon slowly shrinks and then begins to enter the suction hose. Further, the balloon enters the suction hose more and more and bursts at a certain pressure. When the balloon bursts, there is a column of water from the bottom of the well to the top of the pump. The pump is running smoothly because the balloon has burst. After switching off the pump, water cannot fall into the well because a non-return valve is mounted behind the pump. When installing the balloon on the suction hose, care should be taken to first stretch the balloon backwards and then fasten or wrap it with adhesive tape or a rubber band so that pieces of the ruptured balloon do not go into the pump. When a stretched balloon bursts, the balloon bursts in the middle of the hose and pulls back and no longer comes into contact with the water stream going to the pump.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 is a cross-section of a well and a pump with a check valve at the beginning of the suction hose.

Figure 2 is a cross-section of a check valve.

Figure 3 is a cross-section of the suction hose.

Figure 4 represents an electric water pump.

Figure 5 represents a needle or a push pins.

Figure 6 represents the appearance of the inlet part of the suction plastic hose pierced with a push pins.

Figure 7 represents the appearance of a rubber balloon.

Figure 8 shows the appearance of a rubber balloon pulled onto the inlet of a plastic suction hose pierced with a push pins.

Figure 9 represents the appearance of the rubber balloon stretched backwards at the beginning of the suction hose.

Figure 10 represents the appearance of waterproof plastic self-adhesive tape or insulating tape. Figure 11 represents the appearance of rubber or rubber in the form of a cylinder.

Figure 12. represents the appearance of a backward stretched rubber balloon at the beginning of the suction hose that is pierced with a push pin and fixed with two rubber bands or self-adhesive tape.

Figure 13. represents the appearance of a backward stretched rubber balloon at the beginning of the suction hose without the push pin piercing the suction hose .

Figure 14 represents the appearance of a rubber balloon stretched backwards at the beginning of the suction hose fixed with two rubber bands or self-adhesive tape.

Figure 15 is a view of the complete system with the balloon at the beginning of the suction hose, the suction hose, the pump and the outlet hose before the suction hose is immersed in the well.

Figure 16 is a view of the complete system mounted in the well with a balloon at the beginning of the suction hose, suction hose, pump and outlet hose.

Figure 17 is a view of the back stretched rubber balloon at the beginning of the suction hose with the push pin piercing the suction hose immediately after filling the pump and suction hose with water.

Figure 18 represents the appearance of a stretched back rubber balloon at the beginning of the suction hose with a push pin piercing the suction hose immediately after the pump is started, and before the balloon bursts.

Figure 19 represents the back view of the stretched rubber balloon at the beginning of the suction hose without the push pin just after starting the pump, and before the balloon burst.

Figure 20 represents the back view of the stretched rubber balloon at the beginning of the suction hose without the push pin after starting the pump and after the balloon burst.

Figure 21. represents the appearance of the three way connector with a plug used for filling the pump when the pump does not have a filling hole.

Figure 22 represents the appearance of the complete system mounted in the well with the balloon at the beginning of the suction hose, the suction hose, the pump, the three way connector for filling the pump and the outlet hose after the immersion of the suction hose in the well.

Figure 23 represents the appearance of a hand pump with a well under the pump.

Figure 24 represents the appearance of the complete system mounted in the well below the hand pump with a balloon at the beginning of the suction hose, suction hose, pump and outlet hose. DISCLOSURE OF THE INVENTION

Figure 1 shows a pump marked with the symbol 10, to which a suction plastic hose 6 is connected, at the beginning of which a non-return valve 20 is connected, which is immersed in the well 1. A drain hose 12 is also connected to the pump 10. The pump 10 is mounted on the stand 5 next to of the well itself 1. Before putting the pump 10 into operation via the switch 14 and the power source 13 it is necessary to fill the pump with water through the filling hole 11 on the pump 10. After filling the pump 10 and the plastic suction hose 6 with water, the filling hole 11 is usually closed with a screw. The pump 10 is filled with water only the first time because the water cannot pass through the non-return valve 6, which is accessible in the direction from the well 1 to the pump 10. The picture represents the well-known pump connection system. The non-return valve 20 must be mounted at the beginning of the suction hose 6 so that water does not fall into the well 1 when the pump 10 is not working.

Figure 2 shows the non-return valve 20. The non-return valve is open in the direction from the inlet to the outlet, to which a flexible plastic hose 6 is attached.The non-return valve 20 consists of a spring which pushes the gasket or rubber 22 which, when non-return valve is closed, it rests on the body of the non-return valve 23. When there is water pressure between the inlet and outlet, the non-return valve 20 is opened so that the gasket or rubber band 22 does not rest on the body of the non-return valve 23, but is separated by a stream of water.

Figure 3 shows the cross-section of the plastic suction hose 6. The plastic suction hose 6 should be flexible and can be ribbed or smooth. Ribbed hoses are more flexible.

Figure 4 shows the electric water pump 10. For the current construction, it does not matter what type of pump is used, but it is important that the pump creates fluid pressure from the inlet to the outlet. The pump can be motor with a fossil fuel drive, or electric. The mark 15 marks the inlet of the pump 10 and the mark 16 marks the outlet of the pump 10. By default, the electric centrifugal pump 10 is powered by the source of electricity 13. Filling the pump 10 when it is empty of water is done through the filling opening 11 on the pump 10. Opening 11 after filling the pump and suction hose 6 is closed with a screw with a gasket. A couple of liters of water are needed to fill the suction hose 6 and the pump 10.

Figure 5 shows the appearance of a push pin 31 or a presser with a blade 32 that pierces a rubber balloon 30. The push pin 31 can also be a plate pin.

Figure 6 shows the appearance of the top of the suction plastic hose 6 pierced with a push pin 31. The wall of the plastic suction hose 6 is a couple of millimeters thick so that the push pin 31 easily pierces the plastic hose 6 itself. The push pin is fully inserted into the hose. From the beginning of the suction plastic hose to the push pin, the distance is approximately equal to the radius of the hose and less. Figure 7 shows the appearance of the rubber balloon 30. The balloon is made of rubber or latex. Decorative balloons can also be used.

Figure 7 shows the shape of a decorative rubber balloon for easier understanding. The best shape of the balloon is in the form of a cylinder, which is open on one side, and which is pulled onto the suction hose 6. As the rubber balloon is extremely elastic, it follows the shape of something hard to which it is attached. Some balloons burst under higher pressure while others do not. That's why a push pin 31 is inserted, which pierces (drills) the balloon 30, which is pulled onto the suction hose 6.

Figure 8 shows a cross-sectional view of a rubber balloon 30 pulled onto the beginning of the suction hose 6, which is pierced with a push pin 31.

Figure 9 shows a cross-sectional view of the balloon 30 pulled to the beginning of the suction hose 6, which was pierced with a push pin 31. The rubber balloon 30 is stretched and pulled towards the middle of the suction hose 6. The rubber balloon 30, thus stretched and stretched, must be fixed at the beginning of the suction intestines 6.

Figure 10 shows the appearance of the plastic self-adhesive tape 41, which it is used to fix the stretched rubber balloon 30. The adhesive tape is made of stretchable plastic. Such adhesive tape is used to insulate power cables. The balloon that is stretched from the inlet of the suction hose 6 to the middle on the outside of the suction hose 6 needs to be wrapped with adhesive tape 41. The adhesive tape 41 is wrapped a few centimeters from the beginning of the suction hose 6 with the stretched balloon 30 and almost to the very end of the balloon.

Figure 11 shows the appearance of the rubber band 40 for fixing the rubber balloon to the suction hose 6. To fix the rubber balloon on the outside of the suction hose 6, it is necessary to use either adhesive tape 41 or rubber bands 40. The rubber bands 40 have a smaller diameter than the diameter of the suction hose 6. By stretching the rubber band and placing the rubber band on the outside over the stretched balloon 30, the balloon 30 remains stretched because it is held by the rubber band 40.

Figure(Picture)12 shows the appearance of a rubber balloon 30 pulled onto the beginning of the suction hose 6 and stretched and fixed with two rubber bands 40 or adhesive tape. The beginning of the suction plastic hose 6 is pierced with a push pin 31 at a distance smaller than the radius of the hose 6 from the beginning of the suction hose 6 .

Figure 13 shows the appearance of the rubber balloon 30 pulled onto the beginning of the suction hose 6. The balloon is stretched. There are balloons that burst even at lower pressure, so you don't need a push pin 31. Figure 14 shows the appearance of a rubber balloon 30 pulled onto the beginning of the suction hose 6 and stretched and fixed with two rubber bands 40 or adhesive tape. This picture shows a balloon that does not need a push pin 31 because it bursts at less pressure. The balloon bursts at a pressure greater than 0.8 -1.0 bar .

Figure 15 shows the appearance of the entire system before immersing the suction hose 6 in the well 1. Mark 30 indicates the tip of the rubber balloon 30 that protrudes at the beginning of the suction hose 6. The other end of the suction hose 6 is connected to the pump 10. The rubber balloon 30 is stretched, towards the middle of the suction hose 6 and fixed with several rubber bands 40 or adhesive tape 41 for the beginning of the suction hose 6. The pump 10 has an opening for filling the pump 11. A non-return valve 20 is mounted at the outlet of the pump 10, which is permeable from the pump 10 to the outlet hose 12. The pump is powered by the switch 14 from the power source 13.

Figure 16 shows the appearance of the entire system mounted in well 1. Pump 10 and suction hose 6 are not filled with water. Mark 30 marks the tip of the rubber balloon 30 that sticks out at the beginning of the suction hose 6. The balloon 30 is stretched and fixed with several rubber bands 40 or adhesive tape 41 to the beginning of the suction hose 6 at a distance of less than a few centimeters. There is an air in the suction hose 6 and the pump 10, and the suction hose 6 is immersed in the well 1 at a depth of up to 1 m below the water surface of the well 1. The tip of the balloon 30 is very slightly bent towards the middle of the suction hose with a pressure of less than 0.1 bar . The other end of the suction hose 6 is connected to the pump 10. The pump 10 has an opening for filling the pump 11. At the outlet of the pump 10, a non-return valve 20 is mounted, which is passed from the pump 10 to the outlet hose 12. The pump is supplied with electricity via the switch 14 from the power source 13. The function of the non-return valve 20 is to prevent the water from the pump 10 and the suction hose 6 from falling into the well 1 after starting the pump 10.

Figure 17 shows the appearance of the rubber balloon 30 where the pump 10, the suction hose 6 and the balloon 30 are filled with water. Pump 10 has not been commissioned yet. The rubber balloon 30 is pulled onto the beginning of the suction hose 6 and stretched and fixed with two robber bands 40 or adhesive tape. The beginning of the suction plastic hose 6 is pierced with a push pin 31 at a distance smaller than the radius of the hose 6 from the beginning of the suction hose 6. The rubber balloon 30, together with the beginning of the suction hose 6, is immersed in the water in the well 1. The beginning of the suction hose with the tip of the balloon is at the working depth. As the weight of the water from the suction hose 6 and the pump 10 is greater than the pressure of the water from the well 1, the rubber balloon 30 is bulging towards the well 1. The height of the water column is slightly less than 8 m, so the pressure on the balloon from the suction hose 6 towards the well is less than 0.8 bar. As the entire system is filled with water, pump 10 can be put into operation. Figure 18 shows the appearance of the rubber balloon 30 immersed under the water surface of the well 1 immediately after the pump 10 was put into operation. Pump 10 is filled with water and has just started working. The rubber balloon 30 is pulled onto the beginning of the suction hose 6 and stretched and fixed with two rubber bands 40 or adhesive tape. The beginning of the suction plastic hose 6 is pierced with a push pin 31 at a distance smaller than the radius of the hose 6 from the beginning suction hose 6. As the pump 10 is started, the pump will draw water. Now there is pressure from the well 1 to the suction hose 6 and the pump 10. Under the effect of the pressure, the balloon 30 will bend towards the middle of the suction hose 6. The moment the rubber balloon 30, which is bent, hits the tip of the push pin 32, the balloon will burst.

Figure 19 shows the appearance of the rubber balloon 30 immersed under the water surface of the well 1 immediately after starting the pump 10 when the riser 31 was not used. As the pump 10 is started, the pump will draw water. Now there is pressure from the well 1 to the suction hose 6 and the pump 10. Under the pressure, the balloon 30 will bend towards the middle of the suction hose 6. The balloon 30 will bend into the suction hose 6 a few centimeters until it bursts. The balloon should burst at a pressure greater than 1 bar . Otherwise, it can choke the pump 10, that is, the pump 10 does not have enough power to draw water. Therefore, it is much more rational to use a 31 mm push pin.

Figure 20 shows the appearance of the rubber balloon 30 after bursting, immediately after the pump 10 was put into operation. As the rubber balloon 30 was previously stretched, the tip of the balloon bursts when it hits the tip of the push pin 32. Also, if you don't use the a push pin 31, the balloon bursts at critical pressure.

Because the balloon 30 is stretched after bursting, the tip of the burst balloon 30 is pulled outward towards the middle of the suction hose 6 and reaches the rubber band 40.

Extremely rarely, it can happen that a piece of the burst balloon 30 ends up in the suction hose 6 and finally in the pump 10. As the balloon 30 is made of thin rubber, the pieces of thin rubber do not pose any danger to the pump 10.

Figure 21 shows the appearance of the three way connector 70 for filling the pump 10, which does not have a filling hole 11. The three way connector is connected to the suction hose 6 and on the other side to the pump 10 or the suction hose 6. The three way connector has a filling hole and a plug 71 with which three way connector 70 closes.

Figure 22 shows a view of the complete system that uses the three way connector 70 to fill the pump 10 and the suction hose 6 with water. Figure 22 is identical to Figure 16, with the difference that instead of the opening for filling the pump 11, the three way connector 70 is used for filling the pump 10. Figure 23 shows the appearance of the hand pump 80. Mark 81 indicates the inlet pipe of the hand pump 80. Mark 84 indicates the holes on the inlet pipe 81 for the entry of water from the well 83 into the inlet pipe 81.

Figure 24 shows the appearance of the complete system mounted on the pipe of the hand pump 81. Figure 24 is identical to Figure 16, with the difference that the suction hose 6 with with a rubber balloon 30 at the top instead of being immersed in the well 1, pushed into the tube of the hand pump 81.

INDUSTRIAL OR ANOTHER USE OF INVENTION

The application of the invention is in all situations where it is necessary to move the non-return valve located before the pump after the pump. The largest application is certainly given in Figure 24. When the rubber balloon 30 is used at the beginning of the suction hose 6, the dimensions or cross-section of the hose 6 are significantly smaller than the dimensions of the non-return valve 20.

By using a rubber balloon 30, instead of a non-return valve 20, at the beginning of the suction hose 6, shown in Figures 1 and 16, the water flow with the same pump increases. This difference is greatest in the situation when the non-return valve is of small dimensions. When the pump 10 is used above the hand pump pipe 81 as in figure 24, the difference between the system with the balloon 30 figure 24 and the check valve 20 figure 1 at the beginning of the suction hose can be 30-50% in the flow rate. In addition, no plumbing work is required. The suction hose 6 with the rubber balloon 30 is simply lowered either into the well 1 or into the tube of the hand pump 81.