CN103423166B - Circulation air draft self-sucking device - Google Patents

Abstract

The invention relates to a circulating air exhaust self-priming device, which includes a tank body, a water guide cap and a partition are arranged in the tank body, a self-control air exhauster is installed on the top of the tank body, and a return water windshield is installed inside the upper chamber of the tank body. The outer side of the upper chamber of the tank body is connected with a water injection pipe gland, and the upper chamber of the tank body is equipped with a circulating water inlet pipe and a water outlet pipe, and a water suction pipe is arranged under the water guide cap, and the water suction pipe is connected with the injector through the air duct. The injector connects the upper and lower cavities, and the injector is provided with a return water induced air injection pipe, and the top of the return water induced air injection pipe is placed in the return water windshield. In the present invention, the air in the water suction pipe is sucked into the ejector through the air-introducing duct by means of the pressure difference between the upper and lower chambers, and then it is mixed into the lower chamber, and the water flows up and down in the circulating exhaust self-absorbing device. The cycle is repeated, and finally all the air is discharged into nature through the self-control exhauster. There is no air in the water, the discharge pressure of the water pump will naturally rise, and it will be connected to the grid when the pressure reaches the standard.

Description

Circulating exhaust self-priming device

technical field

The invention relates to a circulating exhaust self-absorbing device.

Background technique

Since the advent of synchronous self-priming pumps, many underground pump rooms have been eliminated one after another, completely eradicating the trouble of flooded pump rooms, and also making the pumps more convenient to maintain and use. Therefore, synchronous self-priming pumps have been widely used in recent years. However, with the continuous development of production technology, higher requirements have been put forward for production water supply. Some water places must ensure water supply pressure and flow at any time, otherwise it will affect product quality and even cause production accidents. However, the synchronous self-priming pump has air in the water at the initial stage of pumping, resulting in low pump discharge pressure and difficulty in grid connection; the other is that the self-priming device is large in size and uses too much material, which makes its cost too high; and sometimes it is affected by the installation site. limits.

Contents of the invention

The technical problem to be solved by the present invention is to provide a self-priming device for circulating air, which can let the water circulate between the upper chamber and the lower chamber of the self-priming device after the water pump is started, and the large amount of water stored in the suction pipe The air is vented to the atmosphere during the cycle. There is no air in the water, the discharge pressure of the water pump will naturally rise, and it will be connected to the grid when the pressure reaches the standard.

In order to solve the problems existing in the prior art, the technical solution adopted in the present invention is:

Circulating exhaust self-priming device, including a tank body, a water guide cap and a partition are installed inside the tank body, the water guide cap and the partition board are welded to divide the tank body into upper and lower chambers, and an automatic air exhauster is installed on the top of the tank body , the upper cavity of the tank body is equipped with a return water windshield, the outer side of the upper cavity of the tank body is connected to the water injection pipe gland, the other side of the upper cavity of the tank body is installed with a circulating water inlet pipe, and the lower cavity of the tank body is located outside the circulating inlet A water outlet pipe is set below the water pipe, and a water suction pipe is set under the water guide cap. The water suction pipe communicates with the injector through the air-inducing duct. The injector connects the upper and lower chambers. Injection pipe, the top of the return water induced air injection pipe is placed in the return water windshield.

The self-control air exhauster includes a gravity check valve, a sealing pad, a casing, a buoy and a buoy bottom bracket, the casing is connected to the tank through a flange, the buoy bottom bracket is arranged on the top of the tank body, and the buoy is placed on the buoy bottom bracket On the top, the top of the buoy is equipped with a sealing pad, and the top of the shell is equipped with a gravity check valve.

A sealing gasket is provided at the joint between the shell and the tank body.

Advantage and effect that the present invention has are:

1. The circulating air exhaust self-priming device of the present invention uses the pressure difference between the upper and lower chambers after the water pump is started, so that the water in the upper chamber passes through the return water induction air injection pipe at high speed, and the air in the water suction pipe passes through the air induction pipe. The pipe is sucked into the injector, and then it is infiltrated into the lower chamber by the sprayed water flow. Due to the continuous operation of the water pump, the water circulates repeatedly up and down in the circulating exhaust self-priming device, and finally all the air in the system is in the air. The upper chamber is separated from gas and water and discharged to nature through the self-control exhauster. There is no air in the water, the discharge pressure of the water pump will naturally rise, and it will be connected to the grid when the pressure reaches the standard.

2. The circulating air exhaust self-priming device of the present invention has small volume, low cost and wide application range.

3. The circulating air exhaust self-priming device of the present invention has dual functions, which can independently exhaust air and drain water separately, and is suitable for use in large pumping stations with multiple centrifugal water pumps.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is the structural representation of self-control blower among the present invention;

Fig. 3 is a schematic diagram of the use state of the present invention.

In the figure: water suction pipe 1, water injection pipe gland 2, water guide cap 3, self-control exhaust device 4, air induction duct 5, return water windshield 6, return water introduction air injection pipe 7, injector 8, circulating water inlet pipe 9. Partition plate 10, tank body 11, water outlet pipe 12, gravity check valve 43, sealing pad 44, shell 45, buoy 46, sealing gasket 47, buoy bottom support 48, circulation exhaust self-priming device 24, circulation control gate valve 19 , check valve 20, production water supply gate valve 21, centrifugal pump 22, motor 23.

detailed description

As shown in Figure 1, the self-absorbing device for circulating air of the present invention includes a tank body 11, and a water guide cap 3 and a partition 10 are arranged inside the tank body, and the water guide cap 3 and the partition plate 10 are welded to divide the tank body into upper, upper, and lower tanks. In the lower two chambers, the top of the tank body is equipped with a self-control air exhauster 4, the inside of the upper chamber of the tank body is equipped with a return water windshield 6, the outer side of the upper chamber of the tank body is connected with a water injection pipe gland 2, and the other side of the upper chamber of the tank body is connected A circulating water inlet pipe 9 is installed on one side, and a water outlet pipe 12 is arranged at a position below the circulating water inlet pipe 9 outside the lower cavity of the tank body. The injector 8 is connected, and the injector 8 connects the upper and lower cavities. The injector 8 is provided with a water-introducing jet pipe 7 , and the top of the backwater-inducing air jet tube 7 is placed in the return water windshield 6 .

As shown in Figure 2, the self-control exhauster 4 includes a gravity check valve 43, a sealing pad 44, a casing 45, a buoy 46 and a buoy bottom bracket 48, the casing 45 is connected to the tank body 11 through a flange, and the bottom of the buoy Holder 48 is arranged on the top of tank body, and buoy drum 46 is placed on the buoy drum bottom holder 48, and the top of buoy drum 46 is equipped with sealing pad 44, and the top of shell 45 is installed with gravity check valve 43.

A sealing gasket 47 is provided at the joint between the shell 45 and the tank body 11 .

Below in conjunction with Fig. 3, the usage method of the present invention and working principle thereof are described as follows:

1. Check the circulating water supply gate valve 19 and open it; at the same time, close the production water supply valve 21.

2. Open the gland 2 of the water injection pipe, fill the pipe with water, and then tighten the gland.

3. Start the water pump to let the water circulate repeatedly between the upper chamber and the lower chamber of the circulating exhaust self-priming device. Water enters the water pump from the lower chamber of the exhaust self-priming device, and then flows into the upper chamber of the exhaust self-priming device from the outlet of the water pump, which will cause the water level in the upper chamber to rise continuously, while the pressure in the bottom chamber will continue to drop, thus forming a pressure between the two chambers. difference, and this pressure difference will gradually increase.

4. Since the upper chamber originally has little water and a large space, the water flows slowly in the upper chamber, so the water stays in the upper chamber for a long time, which provides a sufficient guarantee for the separation of gas and water. The separated air, with a certain pressure, will return to nature through the self-control air exhauster 4 at the top.

5. When the water surface in the upper chamber exceeds the return water induced air injection pipe 7, the water in the upper chamber will return to the bottom cavity through the core pipe 7 of the return water induced air device at high speed. It is because of the continuation of this attraction that the air in the water suction pipe 1 of the circulating exhaust self-priming device is drawn into the lower chamber through the air-inducing duct 5, and then is transported to the upper chamber by the water pump. . Due to this repeated up and down cycle, all the air in the water suction pipe is finally discharged into the atmosphere one after another.

6. In the water pump cycle working stage, the sound of air being discharged from the top of the self-control exhauster can be heard at the beginning, and the sound will automatically stop when the air is exhausted, and the formal grid-connected operation can be implemented at this time.

7. Close the circulating water supply gate valve 19, and then open the production water supply gate valve 21 to put into production smoothly.

Combined with Figure 2 and Figure 3, the function of the self-control exhauster is explained:

If the water level rises in the blower shell, it will inevitably cause the buoy 46 to float, and when rising to the top, the sealing pad 44 will contact the lower end of the exhaust pipe at the lower end of the gravity check valve, so that the exhaust is terminated.

When the self-absorbing device for circulating air exhaust stopped working, then it was in a negative pressure state in the self-control air exhauster. At this moment, the gravity check valve 43 would be absolutely tight, and no air leakage would occur.

Claims (2)

1. The circulating exhaust self-priming device is characterized in that it includes a tank body, and a water guide cap and a partition are arranged inside the tank body. The water guide cap and the partition board are welded to divide the tank body into upper and lower chambers, and the top of the tank body A self-control air exhauster is installed, a return water windshield is installed inside the upper cavity of the tank body, a water injection pipe gland is connected to one side of the upper cavity of the tank body, and a circulating water inlet pipe is installed on the other side of the upper cavity of the tank body. A water outlet pipe is provided outside the lower chamber below the circulating water inlet pipe, and a water suction pipe is provided below the water guide cap. There is a return water induced air injection pipe inside, and the top of the return water induced air injection pipe is placed in the return water windshield; the self-control air exhauster includes a gravity check valve, a sealing pad, a shell, a buoy and a buoy bottom support, The shell is connected with the tank through the flange, the buoy base is set on the top of the tank, the buoy is placed on the buoy base, the top of the buoy is installed with a sealing pad, and the top of the shell is installed with a gravity check valve. 2. The circulating exhaust self-priming device according to claim 1, characterized in that: a sealing gasket is provided at the joint between the shell and the tank body.