CN205315292U - Lightweight is jet from inhaling device for pump - Google Patents

Abstract

The utility model discloses a portable air-jet self-priming device for a pump, which is arranged on a pump body and includes a first electromagnetic valve, an injector, a second electromagnetic valve and a check valve. Compressed air is connected to one end of the first electromagnetic valve. , the other end is connected to one end of the injector, the other end of the injector is connected to the second solenoid valve, the other end of the second solenoid valve is connected to one end of the check valve through the main air extraction pipeline, and the check valve is a three-way structure, There is a first suction port at the suction section of the pump body, and a second suction port is opened at the machine seal at the highest point of the pump body, and the first suction port and the second suction port pass through the first suction port respectively. The pipeline and the second suction pipeline communicate with the other two ends of the check valve. The utility model controls the whole self-suction process through an automatic control system, and the system automatically adjusts the switch of the electromagnetic valve and the switch of the motor, the whole process is fully automatically realized, and the operation is convenient.

Description

A portable jet self-priming device for a pump

technical field

The utility model relates to a vacuum suction device for a pump, in particular to a portable air-jet self-priming device for a pump.

Background technique

The self-priming device is one of the commonly used auxiliary devices on the water pump. Its function is to fill the water pump with medium by means of vacuum pumping before starting the water pump, so that the water pump unit can be started directly.

Common self-priming devices mainly include vacuum pumps and float-type jet self-priming devices. Vacuum pumps are bulky, heavy, and noisy, and require a separate power supply, while ordinary float-type jet self-priming devices are heavy in structure. Moreover, it is controlled by a float switch, and the degree of automatic control is low.

Utility model content

Aiming at the above-mentioned shortcomings in the prior art, the purpose of this utility model is to provide a portable pump self-priming device. The utility model makes the water pump smaller and lighter, easier to install, and the self-priming process is automated.

In order to achieve the above object, the utility model adopts the following technical solutions:

A portable jet type self-priming device for a pump, which is installed on the pump body and includes a first solenoid valve, an injector, a second solenoid valve and a check valve. One end of the injector is connected with the second solenoid valve, and the other end of the second solenoid valve is connected with one end of the check valve through the main suction pipe. The check valve is a three-way structure, and the pump body There is a first suction port at the suction section, and a second suction port at the machine seal at the highest point of the pump body. The first suction port and the second suction port pass through the first suction pipe and the second suction port respectively. The gas pipeline communicates with the other two ends of the check valve.

The self-priming device also includes a shut-off valve, which is arranged on the main suction pipeline.

The injector includes a joint, a nozzle, a diffuser pipe, an exhaust pipe, a transition joint and an exhaust pipe. There is a first screw plug, the lower end of the diffuser pipe is connected to the upper end of the exhaust pipe through a transition joint, one end of the exhaust pipe is connected to one side of the first screw plug, and the other end is connected to the second solenoid valve, and the inner diameter of the nozzle is smaller than the minimum diameter of the diffuser pipe. the inside diameter of.

The injector also includes a second screw plug connected to the other side of the first screw plug.

There is also a pressure measuring port at the pressure outlet section of the pump body, and the self-priming device also includes a pressure switch connected to the pressure measuring port.

In the above technical solution, the utility model controls the self-priming process of the whole water pump through an automatic control system, and the system automatically adjusts the switch of the solenoid valve and the switch of the motor, and the whole process is fully automatic and easy to operate.

Description of drawings

Fig. 1 is the schematic diagram of the overall structure of the utility model;

Fig. 2 is the schematic diagram of the utility model injector structure;

Fig. 3 is the circuit diagram of the utility model automatic control system.

detailed description

The technical scheme of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a portable air-jet self-priming device for a pump of the present invention is the same as the prior art, and is also installed on the pump body, so it will not be repeated here. Different from the prior art, the utility model includes a first electromagnetic valve 1, an injector 2, a second electromagnetic valve 3 and a check valve 5. One end of the first electromagnetic valve 1 is connected with compressed air, and the other end is connected to the injector 2. One end is connected, the other end of the injector 2 is connected with the second solenoid valve 3, and the other end of the second solenoid valve 3 is connected with one end of the check valve 5 through the main air extraction pipeline 21, and the check valve 5 is a three-way structure. There is a first suction port 11 at the suction section 12 of the pump body, a second suction port 8 is opened at the mechanical seal 9 at the highest point of the pump body, the first suction port 11 and the second suction port 8 The other two ends of the check valve 5 are respectively communicated with the first suction pipeline 1101 and the second suction pipeline 801. The self-priming device also includes a shut-off valve 4, which is arranged on the main suction pipeline 21. The pump body There is also a pressure measuring port 7 at the pressure outlet section 10, and the self-priming device also includes a pressure switch 6, and the pressure switch 6 is connected to the pressure measuring port 7.

As shown in Fig. 2, the injector 2 includes a joint 13, a nozzle 17, a diffuser pipe 15, an air extraction pipe 19, a transition joint 20 and an exhaust pipe 16. The upper end of the joint 13 is connected with the first electromagnetic valve 1, and the lower end is connected with the first solenoid valve 1 The upper end of the nozzle 17 is connected, the lower end of the nozzle 17 is connected with the upper end of the diffuser pipe 15, and a first screw plug 18 is also provided at the joint, the lower end of the diffuser pipe 15 is connected with the upper end of the exhaust pipe 16 through a transition joint 20, and one end of the exhaust pipe 19 is connected to the second One side of a screw plug 18, the other end links to each other with the second solenoid valve 3, the inner diameter of the nozzle 17 is smaller than the minimum inner diameter of the diffuser pipe 15, and the injector 2 also includes a second screw plug 14, which is connected to the first screw plug 18. The other side.

A portable jet self-priming control method for pumps is: before starting the pump group, connect 5-7bar compressed air to the first solenoid valve 1, the compressed air flow rate is about 120L/min, after starting the pump group, the first The solenoid valve 1 and the second solenoid valve 3 are automatically opened. At this time, the compressed air enters the injector 2 and is discharged from the bottom of the injector 2. The compressed air generates a negative pressure under the action of the injector 2, thereby pumping out the gas in the pump. And it is discharged from the exhaust pipe 16 together with the compressed air. The first suction port 11 provided above the suction section 12 of the pump is used to extract the gas in the pump inlet pipeline. At the same time, there is a mechanical seal 9 at the pump The second pumping port 8 is used to pump out the gas in the pump and the outlet pipe. When the injector 2 pumps out the gas through the first and second pumping ports 11 and 8, the pressure in the pump forms a negative pressure. Under the action, the water flow will automatically fill the pump and the water inlet and outlet pipelines. At this time, the pump group can be safely started to realize the self-priming function of the pump. The stop valve 4 in the automatic self-priming device is used for maintenance and disassembly of the injector 2. It is open during normal use. The check valve 5 also has a three-way function, and its function is to prevent compressed air from entering the pump. The pressure measuring port 7 is provided on the pressure outlet section 10 of the pump 24, and a pressure switch 6 is installed on it. , used to detect the outlet pressure of the pump. When the outlet pressure of the pump reaches the set value, it indicates that the pump has completed normal operation. At this time, under the action of the pressure switch, the first solenoid valve 1 and the second solenoid valve 3 will automatically close, ending a self-priming process.

As shown in Fig. 3, the automatic control system of the present utility model is composed of main switch A3, electromagnetic valve switch A2, pump group switch A3, pressure switch PS (that is, pressure switch 6 in Fig. 1), time delay relay T1, and time delay relay T2, pump group P1, electromagnetic valve EV1 (ie the first electromagnetic valve 1 in Figure 1), and electromagnetic valve EV2 (ie the second electromagnetic valve 3 in Figure 1). When starting, first close the switch A3, at this time the solenoid valves EV1 and EV2 circuits work, the two solenoid valves open, the injector starts to pump air, and the self-priming process begins; at the same time, the delay relay T1 starts to work, and after about 1 minute After the delay, the switch A1 will be closed automatically. At this time, the motor of the pump group P1 will start, and the pump will start to run; after the pump is running, the pressure at the pump outlet will rise. Relay T2 starts to work. After a delay of about 30 seconds, switch A2 will automatically open, solenoid valves EV1 and EV2 will close, and the self-priming process will end. At this time, switch A1 will remain closed, and the pump unit will enter normal operation. The process is complete.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above-mentioned The changes and modifications of the embodiments will all fall within the scope of the claims of the present utility model.

Claims (5)

1. the jet-propelled self-priming apparatus of pump lightweight, it is located on the pump housing, it is characterized in that: include the first electromagnetic valve, ejector, second electromagnetic valve and check-valves, first electromagnetic valve one end is connected with compression air, the other end is connected with ejector one end, the ejector other end and the second electromagnetic valve are connected, the second electromagnetic valve other end is connected with check-valves one end by total pump-line, described check-valves is three-port structure, the suction casing place of the described pump housing has the first air entry, the peak position machine sealing position of the pump housing has the second air entry, first air entry and the second air entry are connected with the two other end of check-valves respectively through the first pump-line and the second pump-line.

2. the jet-propelled self-priming apparatus of pump lightweight as claimed in claim 1, it is characterised in that described self-priming apparatus also includes stop valve, is located on total pump-line.

3. the jet-propelled self-priming apparatus of pump lightweight as claimed in claim 1, it is characterized in that, described ejector includes joint, nozzle, anemostat, exhaust tube, transit joint and exhaustor, upper end of joint and the first electromagnetic valve are connected, lower end is connected with upper end of nozzle, nozzle lower end is connected with anemostat upper end, junction is additionally provided with the first plug screw, anemostat lower end is connected with exhaustor upper end by transit joint, exhaust tube one end is connected at the side of the first plug screw, the other end and the second electromagnetic valve are connected, and the internal diameter of nozzle is less than the minimum diameter of anemostat.

4. the jet-propelled self-priming apparatus of pump lightweight as claimed in claim 2, it is characterised in that described ejector also includes the second plug screw, is connected at the opposite side of the first plug screw.

5. the jet-propelled self-priming apparatus of pump lightweight as claimed in claim 1, it is characterised in that the section of the pressure place that goes out of the described pump housing also has pressure tap, and described self-priming apparatus also includes pressure switch, and pressure switch is connected in pressure tap.