Sampling pump based on electromagnetic induction driven Venturi effect

Abstract

The utility model discloses a sampling pump based on electromagnetic induction driven venturi effect. The sampling pump comprises an electromagnetic diaphragm pump, a venturi tube, a connecting pipeline for connecting the electromagnetic diaphragm pump and the venturi tube, and a monitoring accessory, the electromagnetic diaphragm pump comprises a pump cavity, the pump cavity comprises a diaphragm boundary module, a first air cavity and a second air cavity, the first air cavity and the second air cavity are located on the two sides of the diaphragm boundary module, the diaphragm boundary module comprises a rotor, and the rotor is driven by electromagnetic force to do periodic reciprocating motion in the pump cavity; the outer side of the first air cavity and the outer side of the second air cavity are each provided with an air inlet hole and an air outlet hole, the venturi tube is formed by sequentially connecting a contraction section, a throat pipe and a diffusion section, the venturi tube is communicated with the air outlet hole of the electromagnetic diaphragm pump, and the monitoring accessories comprise a flow sensor and a pressure sensor. A flow sensor is arranged on a connecting pipeline between the venturi tube and the electromagnetic diaphragm pump, and a flow sensor and a pressure sensor are arranged at the position of a negative pressure tube of a throat tube of the venturi tube. The utility model has the advantages of convenience, corrosion resistance and stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum pump technical field especially, relates to a negative pressure device in flue gas on -line sampling device, specifically is a kind of vacuum pump using electromagnetic induction principle drive gas chamber vibration produces high pressure gas source, and forms jet to produce negative pressure by Venturi effect. BACKGROUND

[0002] In the field of flue gas on-line monitoring instrument, most of them involve sampling process, and the flue gas is extracted from the flue to the analysis chamber by stable and reliable gas extraction device or equipment, and the diaphragm pump or jet pump is generally used in the industry to realize this function.

[0003] However, both pumps have their own advantages and disadvantages:

[0004] For the diaphragm pump, it needs to be replaced regularly due to the influence of its use environment, and the main failure types include diaphragm pump motor bearing, shaft (which needs to be replaced regularly) and pump membrane damage (fatigue), etc. The above faults are random, and may cause instrument sampling failure at any time, and cannot work normally. Secondly, in some high-corrosion conditions, the membrane life is sharply reduced due to the direct contact of the membrane with the corrosive flue gas, and in severe cases, it cannot last for more than one month, which poses a higher challenge to the continuous operation of the on-line instrument.

[0005] For the jet pump, it is not a complete sampling device, and it needs to be equipped with a gas source and a pressure stabilizing device. The cleanliness of the gas source is extremely high, and even a gas source pretreatment device is required. For some miniaturization, high cleanliness of gas source and special corrosive gas working conditions, the existing vacuum pump is difficult to meet the requirements of simple and reliable, stable vacuum degree, which causes great inconvenience and challenge to some application scenarios without conditions.

[0006] In view of the above problems, it is of urgent practical significance to develop a new type, efficient and low-maintenance vacuum or negative pressure generating device.

[0007] In order to solve the above problems, the utility model is proposed. Utility model content

[0008] The utility model aims to provide a sampling pump based on electromagnetic induction driven Venturi effect, to solve the problems of complex maintenance, easy corrosion, high requirement for gas source and unsuitable for miniaturization of existing vacuum pump, to realize stable vacuum environment with simple structure, reliable operation and low maintenance cost.

[0009] The purpose of the utility model can be achieved by the following technical solutions:

[0010] The utility model provides a kind of sampling pump based on electromagnetic induction drive venturi effect, including electromagnetic diaphragm pump, venturi and connecting electromagnetic diaphragm pump, the connecting pipeline and monitoring attachment of venturi are composed;Electromagnetic diaphragm pump includes pump cavity, pump cavity includes diaphragm demarcation module and the air cavity one and air cavity two located diaphragm demarcation module two sides, diaphragm demarcation module includes rotor, rotor does periodic reciprocating motion in pump cavity under electromagnetic force drive;The outside of air cavity one and air cavity two is provided with air inlet hole and exhaust hole, venturi is connected by contraction section, throat and diffusion section in turn and is formed, venturi is connected with the exhaust hole of electromagnetic diaphragm pump, monitoring attachment includes flow sensor and pressure sensor, flow sensor is arranged on the connecting pipeline between venturi and electromagnetic diaphragm pump, flow sensor and pressure sensor are arranged on the negative pressure pipe position of the throat of venturi.

[0011] Preferably, the venturi is made of stainless steel or corrosion-resistant plastic material.

[0012] Further, the connecting pipeline is selected from flexible and pressure-resistant rubber pipe or plastic pipe, and the connecting part is connected by clamp or screw thread with good sealing performance.

[0013] Preferably, the diaphragm demarcation module of the electromagnetic diaphragm pump is made of rubber or high polymer material.

[0014] Preferably, the contraction angle of the contraction section of the venturi is between 15-30 degrees, the length of the throat is 2-3 times of the pipe diameter, and the diffusion angle of the diffusion section is between 5-15 degrees.

[0015] Further, the inner diameter of the connecting pipeline is reasonably matched according to the exhaust capacity of the electromagnetic diaphragm pump and the air intake requirement of the venturi.

[0016] Preferably, flow and pressure monitoring points are arranged on the negative pressure pipe position of the throat, and the flow and pressure monitoring points measure the flow and pressure information of the throat through flow sensor two and pressure sensor respectively.

[0017] Further, it further includes a display screen, the display screen is connected with a controller, the controller is electrically connected with the flowmeter one, the pressure gauge and the flowmeter two, the controller acquires the information of the flowmeter one, the pressure gauge and the flowmeter two and displays on the display screen.

[0018] Preferably, the display screen is provided with a flow setting button.

[0019] Further, it further includes a pump body, the pump body is located outside the electromagnetic diaphragm pump, the venturi and the pipeline and monitoring attachment connecting the electromagnetic diaphragm pump and the venturi, and the pump body is provided with data remote transmission function.

[0020] Preferably, it further includes a pump body, and the pump body shell is made of aluminum alloy or engineering plastic.

[0021] Beneficial technical effects:

[0022] 1. Convenience: This utility model incorporates an electromagnetic diaphragm pump and a venturi tube, achieving a high level of ease of maintenance. The electromagnetic diaphragm pump eliminates the complex mechanical transmission structure of traditional vacuum pumps, requiring no replacement of lubricating oil, seals, or other easily damaged parts. Only periodic checks of the diaphragm's wear are needed (or by observing for abnormalities through a flow monitoring module and developing a maintenance plan based on the monitoring results). This results in a long maintenance cycle and low cost. The venturi tube has no moving parts and therefore no wear issues, requiring virtually no maintenance and significantly reducing the overall maintenance workload of the device.

[0023] 2. Corrosion Resistance: Both the diaphragm material of the electromagnetic diaphragm pump and the material selection of the venturi tube are fully considered for resistance to corrosive gases, enabling stable operation in corrosive gas conditions such as chemical and pharmaceutical industries, thus broadening the applicability of the device. Furthermore, the electromagnetic diaphragm pump is a positive pressure pump; the sampled gas does not pass through the pump body, so even if the test gas is corrosive, it will not cause corrosion to the pump body.

[0024] 3. Stability and Reliability: The electromagnetic diaphragm pump precisely controls the movement of the diaphragm through electromagnetic drive, providing a stable positive pressure gas source. Combined with the negative pressure generated by the Venturi tube based on pure physical principles, the vacuum output of the entire vacuum generator is stable, which can meet the application requirements of demanding vacuum environments, such as vacuum-assisted operation of precision laboratory instruments.

[0025] 4. Miniaturization and portability: Compared with traditional large vacuum pumps, the device of this utility model has a compact structure and low noise. The electromagnetic diaphragm pump is small in size and does not require a gas storage tank. The positive pressure exhaust volume can be directly controlled by adjusting the electromagnetic strength, thereby changing the negative pressure flow of the Venturi. It is simple and reliable. The Venturi tube is simple and lightweight, and the connecting pipes are easy to arrange. The whole device is easy to integrate into small equipment or achieve portable applications. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the sampling pump structure based on the electromagnetic induction-driven Venturi effect of this utility model.

[0028] The following reference numerals are used for identification in the figure:

[0029] 1. Air chamber one; 2. Air chamber two; 3. Moving element; 4. Coil; 5. Venturi tube; 6. Control module; 7. Flow meter one; 8. Pressure gauge; 9. Flow meter two; 10. One-way air inlet; 11. One-way air outlet. Detailed Implementation

[0030] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] like Figure 1 As shown, a sampling pump based on the Venturi effect driven by electromagnetic induction comprises an electromagnetic diaphragm pump, a Venturi tube 5, connecting pipes connecting the electromagnetic diaphragm pump and the Venturi tube 5, and monitoring accessories. The electromagnetic diaphragm pump includes a pump chamber, which includes a diaphragm dividing module and air chamber 1 and air chamber 2 located on both sides of the diaphragm dividing module. The diaphragm dividing module includes a mover 3, which performs periodic reciprocating motion within the pump chamber under electromagnetic force. Air inlets 10 and exhaust ports 11 are provided on the outer sides of air chambers 1 and 2, and both air inlets 10 and exhaust ports 11 are equipped with one-way valves. Air chambers 1 and 2 are made of flexible diaphragm material. A coil 4 is wound around the electromagnetic diaphragm pump.

[0032] The monitoring accessories include flow sensors and pressure sensors.

[0033] The vent tube 5 is connected to the exhaust port 11 of the electromagnetic diaphragm pump.

[0034] It also includes a pump body, which is located outside the electromagnetic diaphragm pump, the venturi tube 5, and the pipes and monitoring accessories connecting the electromagnetic diaphragm pump, the venturi tube 5, and the monitoring accessories. The pump body is used to protect and support the electromagnetic diaphragm pump, the venturi tube 5, and the pipes and monitoring accessories connecting the electromagnetic diaphragm pump, the venturi tube 5, and the negative pressure hole on the upper side of the pump body. The air inlet 10 is connected to the negative pressure hole on the upper side of the pump body.

[0035] The electromagnetic diaphragm pump uses a standard 220V AC power input, and its internal electromagnetic drive system operates based on the principle of electromagnetic induction. When powered on, the electromagnetic force drives the mover 3, located between the two flexible diaphragm air chambers 1 and 2, to perform periodic reciprocating motion within the pump chamber, driving air chambers 1 and 2 to circulate and generate a positive pressure air source. Both the inlet 10 and outlet 11 of air chambers 1 and 2 are equipped with one-way valves, ensuring that gas can only enter or exit in one direction. The venturi tube 5 is connected to the exhaust pipe of the outlet 11 of air chambers 1 and 2. A connecting pipe is provided between the venturi tube 5 and the outlet 11, and a flow monitoring module Q1 is installed on the connecting pipe, with a flow meter 7 installed on the flow monitoring module Q1.

[0036] When the diaphragm dividing module moves to the left, the volume of the air cavity 1 increases to generate negative pressure, and the gas is sucked in through the negative pressure hole on the upper side of the pump body; the volume of the air cavity 2 decreases, and the gas is discharged through the exhaust port 11 on the lower side of the cavity 2, at this time, the flow monitoring module Q1 located in the connecting pipeline between the electromagnetic diaphragm pump and the Venturi tube 5 generates flow.

[0037] When the diaphragm dividing module moves to the right, the volume of the air cavity 2 increases to generate negative pressure, and the gas is sucked in through the negative pressure hole on the upper side of the pump body; the volume of the air cavity 1 decreases, and the gas is discharged through the exhaust port 11 on the lower side of the cavity 1, at this time, the flow monitoring module Q1 located in the connecting pipeline between the electromagnetic diaphragm pump and the Venturi tube 5 generates flow.

[0038] The diaphragm dividing module reciprocates left and right, so that the air cavity one 1 and the air cavity two 2 alternately generate stable positive pressure gas source. The diaphragm dividing module is made of corrosion-resistant and high-strength rubber or high-molecular polymer material, which ensures the service life of the pump. The pump body shell is made of aluminum alloy or engineering plastic, which not only ensures the strength but also facilitates heat dissipation.

[0039] The Venturi tube 5 is composed of a converging section, a throat and a diffuser section connected in sequence. The converging section inlet is connected to the exhaust port 11 of the electromagnetic diaphragm pump through a connecting pipeline to ensure that the positive pressure gas from the electromagnetic diaphragm pump flows smoothly. The gas flow rate increases in the converging section, and according to Bernoulli's principle, a low pressure area is formed at the throat, generating a negative pressure suction effect, and the surrounding gas is sucked in. The diffuser section is used to discharge the mixed gas and restore it to normal pressure. The negative pressure pipe of the throat of the Venturi tube 5 is provided with a flow and pressure monitoring point, and the flow and pressure monitoring point measures the flow and pressure information of the throat through the flow sensor 2 and the pressure sensor 8 respectively.

[0040] The negative pressure hole inside the negative pressure pipe of the Venturi tube 5 is provided with a flow and pressure sensor to monitor the vacuum degree and vacuum flow in real time.

[0041] Generally, the flow is introduced for convenient measurement, and it is difficult to measure the flow directly at the throat.

[0042] The converging angle of the converging section of the Venturi tube 5 is between 15-30 degrees, the length of the throat is 2-3 times the pipe diameter, and the diffusing angle of the diffuser section is between 5-15 degrees.

[0043] The Venturi tube 5 is made of stainless steel or corrosion-resistant plastic material, such as polytetrafluoroethylene, to resist the corrosion of possible corrosive gases and ensure long-term stable operation of the device.

[0044] The connecting pipe is made of flexible and pressure-resistant rubber pipe or plastic pipe, the inner diameter of which is reasonably matched with the exhaust capacity of the electromagnetic diaphragm pump and the air intake requirement of the Venturi tube 5 to ensure smooth air flow transmission, and the connecting part is connected by quick plug or screw thread with good sealing performance to prevent gas leakage. The connecting pipe between the electromagnetic diaphragm pump and the Venturi tube 5 is provided with a flow monitoring point Q1 to display the flow generated by the electromagnetic diaphragm pump in real time; at the same time, the flow and pressure monitoring points are arranged at the position of the negative pressure pipe of the Venturi tube 5, the electromagnetic intensity of the coil 4 is changed to change the volume change of the air cavity one 1 and the air cavity two 2, and then the flow of the flow monitoring point Q1 is further controlled, and finally the negative pressure and negative pressure flow of the Venturi tube 5 are changed. At the same time, when the actual monitoring flow of the flowmeter two 9 and the pressure gauge 8 exceeds the set flow, the pump body realizes abnormal alarm, and the pump body is provided with data remote transmission function, which can be remotely transmitted to other terminals.

[0045] The display screen 6 is further provided, the display screen 6 is connected with a controller, the controller is electrically connected with the flowmeter one 7, the pressure gauge 8 and the flowmeter two 9, the controller obtains the information of the flowmeter one 7, the pressure gauge 8 and the flowmeter two 9 and displays on the display screen 6, and the display screen 6 is provided with a flow setting button, the controller is connected with the coil, the electromagnetic intensity of the coil 4 is changed through the flow setting button, the amplitude of the reciprocating motion of the mover is changed to adjust the positive pressure flow, and finally the negative pressure of the Venturi tube 5 is changed. In addition, it should be understood that although the present specification is described according to the embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and the person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined to form other embodiments which can be understood by the person skilled in the art.

Claims

1. A sampling pump based on electromagnetic induction-driven Venturi effect, characterized in that, It comprises an electromagnetic diaphragm pump, a venturi tube, connecting pipes and monitoring accessories. The electromagnetic diaphragm pump includes a pump chamber, which includes a diaphragm dividing module and two air chambers located on either side of the dividing module. The dividing module includes a mover that performs periodic reciprocating motion within the pump chamber under electromagnetic force. Air inlets and outlets are provided on the outer sides of both air chambers. The venturi tube is composed of a constriction section, a throat, and a diffuser section connected in sequence. The venturi tube is connected to the outlet of the electromagnetic diaphragm pump. The monitoring accessories include a flow sensor and a pressure sensor. A flow sensor is installed on the connecting pipe between the venturi tube and the electromagnetic diaphragm pump, and a flow sensor and a pressure sensor are installed at the negative pressure position of the throat of the venturi tube.

2. The sampling pump based on electromagnetic induction-driven Venturi effect according to claim 1, characterized in that: The venturi tube is made of stainless steel or corrosion-resistant plastic.

3. The sampling pump based on electromagnetic induction-driven Venturi effect according to claim 1, characterized in that: The connecting pipe is made of flexible and pressure-resistant rubber or plastic pipe, and the connection parts are connected by clamps or threads with good sealing performance. At the same time, a flow monitoring module Q1 is installed.

4. The sampling pump based on electromagnetic induction-driven Venturi effect according to claim 1, characterized in that: The diaphragm separation module of the electromagnetic diaphragm pump is made of rubber or polymer material.

5. The sampling pump based on electromagnetic induction-driven Venturi effect according to claim 1, characterized in that: The contraction angle of the constriction section of the Venturi tube is between 15 and 30 degrees, the throat length is 2 to 3 times the tube diameter, and the diffusion angle of the diffusion section is between 5 and 15 degrees.

6. The sampling pump based on electromagnetic induction-driven Venturi effect according to claim 1, characterized in that: The inner diameter of the connecting pipe is reasonably matched according to the exhaust volume of the electromagnetic diaphragm pump and the air intake requirements of the venturi tube.

7. The sampling pump based on electromagnetic induction-driven Venturi effect according to claim 1, characterized in that: It also includes a pump body, the outer casing of which is made of aluminum alloy or engineering plastic.

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