CN219412936U - Self-priming pump - Google Patents

Abstract

The utility model relates to a self-priming pump, which is characterized in that a liquid inlet pipe of a pump body is connected with a fluid chamber through a vacuum pipe at an inlet of the pump body, the fluid chamber is connected with a gas suction device through an electromagnetic valve, a liquid level sensor is further arranged on the fluid chamber, the liquid level sensor is higher than or flush with a pump head exhaust port at the top of the pump body, the pump head exhaust port is communicated with the fluid chamber through the vacuum pipe, the diameter of the vacuum pipe is smaller than that of the vacuum pipe at the inlet of the pump body, a first switch valve is arranged on the vacuum pipe at the inlet of the pump body, a second switch valve is arranged on the vacuum pipe at the pump head, and the self-priming pump further comprises a control unit for controlling the electromagnetic valve to be closed after receiving signals of the liquid level sensor. The utility model firstly vacuumizes through the inlet vacuum tube of the pump body with larger diameter, has high speed, and then vacuumizes through the vacuum tube of the pump head, so that air can not be reserved, and potential safety hazards caused by air reservation can not occur while the starting time of the pump body is ensured to be short.

Description

Self-priming pump

Technical Field

The utility model relates to a self-priming pump, in particular to a self-priming pump capable of being started at a low liquid level.

Background

Pumps are a common type of fluid power device used for fluid delivery and are widely used to deliver liquids, gas-liquid mixtures and liquids containing suspended solids. The working principle of the pump is that the purpose of driving fluid movement is achieved by pressurizing a medium, the pump is required to be filled with fluid, namely, a working chamber of the pump cannot be higher than the liquid level, otherwise, the pump cannot work, in real engineering, the condition cannot be fully achieved, when the working chamber of the pump cannot be below the liquid level, the starting work of the pump cannot be automatically completed, manual filling is required, the pump is a complicated work, if the liquid is water, the conventional liquid such as water is still ready, if the liquid is not very troublesome, in order to solve the problem, a self-priming pump is generally found on the market, but the common self-priming pump has poor self-sucking capability and long starting time, and in order to solve the problem, the application number is as follows: 201020162488.5 discloses a synchronous self-priming pump of lamination compressor, its lamination compressor is connected with the pump main part and uses, also can directly be with import and export pipeline connection use, the lamination compressor can discharge the air, make the liquid level rise, full of the whole working chamber of pump, thereby reach the purpose of inhaling the skin, but, when the pipe connection is on the import pipeline, fluid can not pass through the working chamber of pump when being sucked up, the resistance is little, the start-up of pump is fast, but still can exist some air in the working chamber of pump, need discharge the air through the principle of communicating vessel, owing to lack of power drive, the liquid just relies on gravity to accomplish this action, the time spent is very long, the start-up of pump is very slow, lose meaning, and even if, also can't be fully filled with by the fluid, still there is a certain amount of air, long time so start-up, can cause the cavitation of pump, seriously influence the life of pump, when the pipe connection is on the pump body or export pipeline, fluid can be pressed through the working chamber, though the problem of air is left in the working chamber, the gap of pump has been solved, the problem of air is very little under the circumstances that work is very little, the liquid is very low in the circumstances of working time, and very long time is very fast, the problem of starting up is very fast is realized simultaneously, and can't be started up.

Disclosure of Invention

The utility model aims to provide a self-priming pump, which solves the problem that the self-priming pump in the prior art cannot simultaneously solve the problems of safe starting and quick starting.

In order to solve the problems, the self-priming pump provided by the utility model adopts the following technical scheme: the utility model provides a self priming pump, includes the pump body, the pump body has feed liquor pipe and drain pipe, be connected with the fluid room through pump body entry vacuum tube on the feed liquor pipe, the fluid room is connected with gas suction device through the solenoid valve, still is provided with level sensor on the fluid room, level sensor be higher than the pump head gas vent at pump body top or with the pump head gas vent parallel and level at pump body top, pump head gas vent and fluid room between communicate through the pump head vacuum tube, the diameter of pump head vacuum tube is less than the diameter of pump body entry vacuum tube, be provided with first ooff valve on the pump body entry vacuum tube, be provided with the second ooff valve on the pump head vacuum tube, the self priming pump still include the control unit that control solenoid valve was closed after receiving level sensor's signal.

The junction of the pump body inlet vacuum tube and the fluid chamber is provided with a sight glass.

The inlet vacuum tube of the pump body is a straight tube which is vertically arranged.

The fluid chamber is a cone with a downward tip.

The upper part of the fluid chamber is provided with an air inlet, and the air inlet is provided with a normally closed switch valve.

The connection point of the electromagnetic valve and the fluid chamber is positioned on the upper end surface of the fluid chamber.

The second switch valve and the switch valve are electromagnetic valves.

The gas suction device is one of a laminated blowing and sucking dual-purpose air pump, a vortex air pump, a reciprocating vacuum pump or a compressor.

The second switch valve is an electromagnetic valve which is simultaneously controlled to be closed by the control unit when the control unit controls the electromagnetic valve to be closed.

The control unit is arranged in the automatic control cabinet.

According to the utility model, the liquid inlet pipe of the pump body is connected with the fluid chamber through the pump body inlet vacuum pipe with larger diameter, the pump head exhaust port of the pump body is connected with the fluid chamber through the pump head vacuum pipe with smaller diameter, the fluid chamber is vacuumized through the gas suction device, gas in the liquid inlet pipe is pumped out through the pump body inlet vacuum pipe at first, the liquid level rises, a worker closes the first switch valve, the gas suction device continues to work, the negative pressure increases, the gas in the pump body working chamber is pumped out through the pump head vacuum pipe, no air is reserved, and the pumping time is shorter because the residual air storage is smaller. At this moment, the pump body is started to carry out liquid conveying, so that the high liquid level of the pump body is started, a bottom valve is not required to be installed, the pump body is not required to be filled with liquid, the starting time of the pump body is short, and potential safety hazards caused by air retention problems are avoided.

The connection part of the inlet vacuum tube of the pump body and the fluid chamber is provided with the sight glass, so that workers can see the water level position through the sight glass, the first switch valve is closed timely, the estimated time is not needed, and the time can be accurately mastered.

The inlet vacuum tube of the pump body is a straight tube which is vertically arranged, and the resistance is small.

The upper part of the fluid chamber is provided with the air inlet, the air inlet is provided with the normally closed switch valve, and the switch valve can be opened according to the requirement when the pump body is not used for a long time, so that liquid in the liquid chamber is discharged, and possible problems are avoided, for example, if the liquid is water, the liquid can be frozen at a low temperature, and the system cannot be used.

The second switching valve is an electromagnetic valve which is controlled to be closed by the control unit simultaneously when the control unit controls the electromagnetic valve to be closed, so that the second switching valve does not need to be closed manually, and the operation is more convenient.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the following briefly describes the drawings that are required to be used in the embodiments:

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a partial enlarged view at B in fig. 1.

Detailed Description

In order to make the technical purpose, technical scheme and beneficial effect of the present utility model more clear, the technical scheme of the present utility model is further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the specific embodiments of the self-priming pump according to the present utility model, in fig. 1, 2 and 3, the pump body 1 has a liquid inlet pipe 2 and a liquid outlet pipe 3, the liquid inlet pipe 2 is connected with a pump body inlet vacuum pipe 4, the pump body inlet vacuum pipe 4 is a straight pipe extending vertically, a fluid chamber 5 is disposed at the upper end of the pump body inlet vacuum pipe 4 in a communicating manner, the fluid chamber 5 is a conical box body with its tip facing downward and at the tip end in communicating with the pump body inlet vacuum pipe, a sight glass 6 is disposed on the pump body inlet vacuum pipe 4, the sight glass 6 is a transparent component, and is commonly divided into two types of round and square, so that the inside can be observed. The mirror is a commercially available part, which is not explained here. The sight glass 6 is in a position where the pump body inlet vacuum tube is connected to the fluid chamber 5. The upper end face of the fluid chamber 5 is connected with an electromagnetic valve 7 through a pipeline, the electromagnetic valve 7 is connected with a laminated blowing and sucking dual-purpose air pump 8 through a pipeline, the laminated blowing and sucking dual-purpose air pump 8 can vacuumize a pump body through the fluid chamber and a pump body inlet vacuum tube, and the DLB laminated blowing and sucking dual-purpose air pump is used in the example, and belongs to a commercially available part. The pump head vacuum tube 9 is communicated with the pump head exhaust port of the pump body, the pump head vacuum tube 9 communicates the pump head exhaust port with the fluid chamber 5, and the diameter of the pump head vacuum tube 9 is smaller than that of the pump body inlet vacuum tube 4. A first switch valve 10 is arranged on the inlet vacuum tube 4 of the pump body in series, a second switch valve 11 is arranged on the pump head vacuum tube 9 in series, and the first switch valve and the second switch valve are manual valves. The upper end face of the fluid chamber 5 is also provided with a liquid level sensor 12, the liquid level sensor 12 is higher than a pump head exhaust port at the top of the pump body, a control unit of the self-priming pump is arranged in an automatic control cabinet 13, when the liquid level sensor 12 monitors liquid, a signal is sent to the control unit, after the control unit receives the signal, the control unit controls the electromagnetic valve to be closed, and vacuumizing work is not performed any more, and the self-priming pump is a very simple conventional control system, belongs to known techniques and is not described in detail herein, and a control diagram is not provided.

In the above embodiments, the connection between the inlet vacuum tube of the pump body and the fluid chamber is provided with a sight glass, and in other embodiments, the sight glass may not be provided, and the worker may perform the operation of closing the first switch valve according to experience.

In the above embodiment, the inlet vacuum tube of the pump body is a straight tube arranged vertically, and in other embodiments, a bent tube may be adopted according to the actual space position.

The fluid chamber in the above embodiments is a cone with the tip down, but may be a box of other geometries in other embodiments.

In other embodiments, an air inlet may be provided on the upper end surface of the fluid chamber 5, and a normally closed on-off valve may be provided on the air inlet, which may be a solenoid valve.

The gas suction device in the above embodiment is a laminated blowing and sucking dual-purpose gas pump, and in other embodiments, one of a vortex gas pump, a reciprocating vacuum pump or a compressor may be selected, and the compressor may be a one-stage compressor or a multi-stage compressor.

The level sensor in the above embodiments is higher than the pump head exhaust port at the top of the pump body, and in other embodiments may be flush with the pump head exhaust port at the top of the pump body.

The second switching valve in this example is a manual valve, and in other embodiments, a solenoid valve may be provided, and the second switching valve may be controlled to be closed at the same time when the control unit controls the solenoid valve to be closed.

Of course, in other embodiments, the first switch valve may also be an electromagnetic valve, and the first switch valve may be controlled to be opened or closed by manual power on or off.

When the air pump works, the first switch valve and the second switch valve are guaranteed to be in an opened state, then the electromagnetic valve is opened, the laminated blowing and sucking dual-purpose air pump is started to vacuumize, the diameter of the inlet vacuum tube of the pump body is large, the vacuum state is formed in the liquid inlet tube and the inlet vacuum tube of the pump body quickly, low-liquid-level fluid is filled in the liquid inlet tube and the inlet vacuum tube of the pump body instantly under the action of atmospheric pressure, after a worker sees the liquid level from a sight glass, the first switch valve is manually closed, the laminated blowing and sucking dual-purpose air pump continues to work, the working chamber of the pump body is vacuumized through the air outlet of the pump head, after the whole pump body is filled with fluid and the liquid level is detected by the liquid level sensor arranged on the fluid chamber, a signal is sent to the control unit, the electromagnetic valve is controlled to be closed after the control unit receives the signal, the vacuumizing work is not carried out, the power supply of the laminated blowing and sucking dual-purpose air pump is manually closed in the process, and then the pump body is started to carry out fluid delivery, and high-level starting of the pump is completed.

In other embodiments, the control unit may also control the closing of the power supply for starting the laminated blowing and sucking dual-purpose air pump while controlling the closing of the electromagnetic valve.

Some of the valves in this embodiment are manually controlled, and in other embodiments, those skilled in the art may choose to electronically control in a conventional manner, as desired.

In other embodiments, the sight glass may not be provided, a liquid level sensor is installed at the position of the sight glass, and after the sensor detects the liquid level, a signal is sent to the control unit, and the control unit controls the first switch valve to be closed.

Finally, what should be said is: the above embodiments are only for illustrating the technical solution of the present utility model, and any equivalent replacement of the present utility model and modification or partial replacement without departing from the spirit and scope of the present utility model should be covered in the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a self priming pump, includes the pump body, the pump body has feed liquor pipe and drain pipe, its characterized in that, be connected with the fluid room through pump body entry vacuum tube on the feed liquor pipe, the fluid room is connected with gas pumping device through the solenoid valve, still is provided with level sensor on the fluid room, level sensor be higher than the pump head gas vent at pump body top or with the pump head gas vent parallel and level at pump body top, pump head gas vent and fluid room between communicate through the pump head vacuum tube, the diameter of pump head vacuum tube is less than the diameter of pump body entry vacuum tube, be provided with first ooff valve on the pump body entry vacuum tube, be provided with the second ooff valve on the pump head vacuum tube, the self priming pump still include the control unit that control solenoid valve was closed after receiving level sensor's signal.

2. The self-priming pump according to claim 1, wherein a sight glass is provided at the junction of the inlet vacuum tube of the pump body and the fluid chamber.

3. The self-priming pump of claim 2, wherein said pump body inlet vacuum tube is a vertically disposed straight tube.

4. A self-priming pump according to claim 3, wherein said fluid chamber is a cone with a downward tip.

5. The self-priming pump of claim 4, wherein the upper portion of the fluid chamber is provided with an air inlet, and a normally closed on-off valve is provided on the air inlet.

6. The self-priming pump of claim 5, wherein the connection point of the solenoid valve to the fluid chamber is on an upper end surface of the fluid chamber.

7. The self-priming pump of claim 6, wherein the second on-off valve and the on-off valve are solenoid valves.

8. The self-priming pump according to claim 7, wherein said gas pumping means is one of a stacked blow-suction dual-purpose air pump, a vortex air pump, a reciprocating vacuum pump, or a compressor.

9. The self-priming pump according to any one of claims 1 to 8, wherein the second switching valve is a solenoid valve which is controlled to be closed by the control unit simultaneously when the control unit controls the solenoid valve to be closed.

10. The self priming pump of claim 9, wherein said control unit is disposed within an automatic control cabinet.