Diaphragm air pump performance test equipment

Abstract

A diaphragm air pump performance test device belongs to the technical field of test devices and comprises a positive pressure sensor, a negative pressure sensor, an electromagnetic valve, an air compressor, a workbench, a single-chip microcomputer module, a test fixing seat, a flow meter, a voltmeter, a hose connector, a detection circuit and an alarm circuit. An isolation plate, a single-chip microcomputer module, a detection circuit and an alarm circuit are arranged in the workbench, a voltmeter is installed at the upper end in the workbench, and an air compressor is installed at the lower end in the workbench; the positive pressure sensor, the negative pressure sensor and the electromagnetic valve are installed on the partition plate, and the test fixing base is installed at the front end of the workbench. By means of simple switching of the power switch, input and output flow, input and output pressure data and generated negative pressure data of the diaphragm air pump in unit time can be detected, pressure maintaining data in unit time can also be detected, and when the pressure maintaining data is abnormal, a worker can be prompted to end the detection process in time through the alarm. According to the utility model, convenience is brought to workers, and detection data is more comprehensive.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a diaphragm air pump performance testing device. Background Art

[0002] Diaphragm air pumps utilize compressed air to discharge materials. Because they lack a motor, the entire pump is lightweight, and its internal structure is relatively simple and compact, making it compact and easy to use and install. In terms of performance, diaphragm pumps are as adaptable to media as screw pumps. They prevent leakage during transport and remain undamaged even under load. They also have automatic protection features and fewer vulnerable internal components. Unlike other pumps, which can experience performance degradation after long-term wear and tear, diaphragm pumps are ideal for transporting gases and liquids in the industrial sector and are widely used.

[0003] Diaphragm air pumps must undergo performance testing after finalization and maintenance. Only qualified tests are allowed before use. Existing diaphragm air pump testing devices generally only test the diaphragm air pump's continuous operation and input and output material flow. The test data is relatively simple and cannot guarantee the diaphragm air pump's subsequent stable and reliable operation. Based on the above, it is particularly necessary to provide a device that can test more data about diaphragm air pumps. Utility Model Content

[0004] In order to overcome the drawbacks of the existing diaphragm air pump testing device due to structural limitations as described in the background, the utility model combines the existing mature single-chip microcomputer-based data acquisition and display technology, and under the joint action of relevant mechanisms, can detect the input and output flow of the diaphragm air pump per unit time, as well as the input and output pressure data and the generated negative pressure data through a simple power switch switch. It can also detect the pressure holding data per unit time, and can promptly prompt the staff to end the detection process when the pressure holding data is abnormal, thereby bringing convenience to the staff and realizing a diaphragm air pump performance testing equipment with more comprehensive detection data.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A diaphragm air pump performance test device, including a positive pressure sensor, a negative pressure sensor, a solenoid valve, an air compressor, a workbench, a single-chip microcomputer module, a test fixture, a flow meter, a voltmeter, a hose connector, and also has a detection circuit and an alarm circuit; an isolation board is provided inside the workbench, the single-chip microcomputer module, the detection circuit and the alarm circuit, and the voltmeter are fixedly mounted on the upper end of the workbench, and the air compressor is fixedly mounted on the lower end of the workbench; at least two connecting pipes are fixedly mounted on one side of the front end of the workbench, there are multiple solenoid valves and at least two sets of flow meters, the positive pressure sensor, the negative pressure sensor, and the solenoid valve are fixedly mounted on the partition, the first end and the second end of a three-way pipe are fixedly connected to one end of the first solenoid valve and one end of the second solenoid valve respectively; the other end of the first solenoid valve is fixedly connected to the exhaust pipe of the air storage tank of the air compressor, and the three-way pipe is fixedly mounted on the first end and the second end of the three-way pipe. The three ends are fixedly connected to one end of the first set of flow meters, the other end of the first set of flow meters is connected to the rear side of one of the connecting pipes via a first pipe, the intake pipe of the negative pressure sensor is fixedly installed on the first pipe, one end of the third solenoid valve is fixedly connected to one end of the second set of flow meters, the other end of the second set of flow meters is connected to the rear side of the other connecting pipe via a second pipe, and the intake pipe of the positive pressure sensor is fixedly installed on the second pipe; the front sides of the two connecting pipes have external threads, and the test fixing seat is fixedly installed on one side of the table top of the workbench; the signal output ends of the flow meter, positive pressure sensor, and negative pressure sensor are electrically connected to the multi-channel signal input end of the single-chip microcomputer module respectively, the signal output end of the positive pressure sensor is electrically connected to the signal input end of the detection circuit, and the signal output end of the detection circuit is electrically connected to the signal input end of the alarm circuit.

[0007] Furthermore, a fixing bolt is provided at a side end of the test fixing seat, and the diaphragm air pump to be tested is mounted on the test fixing seat and fixed via a nut.

[0008] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0009] Furthermore, the rear ends of the two metal hose connectors are respectively connected to the air inlet pipe and the exhaust pipe of the diaphragm air pump being tested, and the front ends of the two metal hose connectors are respectively connected to the front ends of the two connecting pipes.

[0010] Furthermore, the detection circuit includes an electrically connected adjustable resistor and a resistor, and the adjustable resistor is connected to one end of the resistor.

[0011] Furthermore, the alarm circuit includes an electrically connected three-terminal voltage detector, a resistor, a transistor and an alarm, the negative power input terminal of the alarm is connected to the negative power input terminal of the three-terminal voltage detector, the output terminal of the three-terminal voltage detector is connected to one end of the resistor, the other end of the resistor is connected to the base of the transistor, and the positive power input terminal of the alarm is connected to the collector of the transistor.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention combines the existing mature technology of data acquisition and display based on single-chip microcomputer, and under the joint action of two sets of flow meters, positive pressure sensors, and negative pressure sensors, it can detect the input and output flow of the diaphragm air pump per unit time, as well as the input and output pressure data and the generated negative pressure data through a simple power switch switch. It can also detect the pressure holding data per unit time, and when the pressure holding data is abnormal, it can promptly prompt the staff to end the detection process through the alarm. The present invention brings convenience to the staff and realizes the invention technical effect of more comprehensive detection data. In summary, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 It is a front structural schematic diagram of the utility model.

[0015] Figure 2 It is a rear view structural schematic diagram of the utility model.

[0016] Figure 3 This is a circuit diagram of the utility model.

[0017] Figure 4 It is a schematic block diagram of the local structural connection of the utility model.

[0018] Figure 5 This is a photo of the actual product of the utility model (the test fixture has not yet been installed) DETAILED DESCRIPTION

[0019] Figure 1 、 2As shown in Figures 3 and 4, a diaphragm air pump performance test device includes a power module T1, a positive pressure sensor T2, a negative pressure sensor T3, solenoid valves DC1, DC2, DC3, an air compressor (not shown in the figure), a workbench 1, a single-chip computer module T6 with a multi-channel signal input terminal and an LCD display, power switches S1, S2, S3, S4, a test fixture 2, flow meters T4 and T5, a voltmeter V, a metal hose connector (not shown in the figure), a power socket XZ, and a detection circuit 3 and an alarm circuit 4; a welding is provided in the middle of the workbench 1. An isolation board 101, a power module T1, a single-chip computer module T6, a power switch, a detection circuit 3 and an alarm circuit 4, a voltmeter V, and a power socket XZ are installed on the upper circuit board inside the workbench 1, and the display interface of the voltmeter V, the display interface of the single-chip computer module T6, the jack of the power socket XZ, and the operation buttons of the four power switches are respectively located outside the two openings and five openings on the outside of the front end of the workbench 1. The air compressor is fixedly installed at the lower end of the workbench 1; two connecting pipes 102 are welded in the middle of the right side of the front end of the workbench 1, there are three solenoid valves and two sets of flow meters , the positive pressure sensor T2, the negative pressure sensor T3, the solenoid valves DC1, DC2, and DC3 are fixedly installed on the upper end of the partition, and the first end and the second end of a three-way pipe are respectively connected to one end of the first solenoid valve DC1 and one end of the second solenoid valve DC2 through a pipe joint; the other end of the first solenoid valve DC1 is connected to the exhaust pipe of the air compressor's gas tank through a pipe, the third end of the three-way pipe is connected to one end of the first set of flow meters T4 through a pipe joint, the other end of the first set of flow meters T4 is connected to the rear side of the connecting pipe 102 on the left side of the right end through the first pipe, and there is a first An internal threaded opening is provided, and the lower end of the air intake pipe of the negative pressure sensor T3 is threadedly installed in the first internal threaded opening; one end of the third solenoid valve DC3 and one end of the second set of flow meters T5 are connected through a pipe joint, and the other end of the second set of flow meters T5 and the rear side of the connecting pipe 102 on the right side of the right end are connected through a second pipe, and there is a second internal threaded opening at the upper middle end of the second pipe, and the lower end of the air intake pipe of the positive pressure sensor T2 is threadedly installed in the second internal threaded opening; the front sides of the two connecting pipes 102 have external threads, and the test fixing seat 2 is fixedly installed on the left end of the table top of the workbench 1.

[0020] Figure 1 、 2As shown in Figures 3 and 4, there are fixing bolts 21 on both sides of the test fixing seat. The fixing holes of the fixing shells on both sides of the tested diaphragm air pump 5 are respectively covered with the two fixing bolts 21 and fixed with nuts. The solenoid valves DC1, DC2, and DC3 are normally closed valve core solenoid valves. The rear ends of the two metal hose connectors are respectively connected to the intake pipe and exhaust pipe of the tested diaphragm air pump 5, and the front ends of the two metal hose connectors are respectively connected to the front ends of the two connecting pipes 102. The detection circuit includes an adjustable resistor RP1 and a resistor R1 connected via circuit board wiring, and the adjustable resistor RP is connected to one end of the resistor R1. The alarm circuit includes wiring connecting a three-terminal voltage detector T7, resistor R2, transistor Q1, alarm B, and power switch AS4 via a circuit board. The negative power input of alarm B is connected to pin 3 of the negative power input of three-terminal voltage detector T7. The output of three-terminal voltage detector T7 is connected to one end of resistor R2, the other end of resistor R2 is connected to the base of transistor Q1, the emitter of transistor Q1 is connected to one end of power switch AS4, and the positive power input of alarm B is connected to the collector of transistor Q1. The power input of voltmeter V, power input pins 1 and 2 of power module T1, the power input of power socket XZ, and the power input of air compressor M are connected in series via a power switch S5 and connected to the two poles of the AC 220V power supply via wires. The power output terminals 3 and 4 of the power module T1, the power input terminals 1 and 2 of the two flow meters T4 and T5, the power input terminals 1 and 2 of the positive pressure sensor T2, the power input terminals 1 and 2 of the negative pressure sensor T3, the power input terminals 1 and 2 of the single-chip microcomputer module T6, the power input terminals of the power switches S1, S2, and S3, the power input terminals of the detection circuit, the other end of the adjustable resistor RP1 and the other end of the resistor R1, the power input terminal of the alarm circuit, the other end of the power switch AS4, and the negative power input terminal of the alarm B are connected through the conductor respectively. Wires are connected to the signal output terminals 3 of the two flowmeters T4 and T5, the signal output terminal 3 of the positive pressure sensor T2, the signal output terminal 3 of the negative pressure sensor T3, and the four signal input terminals 5, 6, 3, and 4 of the single-chip microcomputer module T6. A wire also connects the signal output terminal 3 of the positive pressure sensor T2 to the other end of the adjustable resistor RP1 at the signal input of the detection circuit. A wire also connects one end of the adjustable resistor RP1 at the signal output of the detection circuit to pin 2 of the three-terminal voltage detector T7 at the signal input of the alarm circuit. Wires are also connected to the power output terminals of the power switches S1, S2, and S3, the negative power output terminal of the power module T1, and the power input terminals of the solenoid valves DC1, DC2, and DC3. The handles of the power switches AS4 and S5 are located outside the other two openings on the outside front of the workbench 1.

[0021] Figure 1 、 2As shown in Figures 3 and 4, this novel device combines existing, mature, single-chip microcomputer-based data acquisition and display technology to provide a variety of data acquisition and display functions (the aforementioned technologies are currently mature technologies and are not described in detail in this application, nor do they represent any technical solutions). After turning on the main power switch, 220V AC power enters the power input of power module T1. Power module T1 then outputs a stable 12V DC power supply that is fed into the single-chip microcomputer module T6, the positive pressure sensor T2, the negative pressure sensor T3, two flowmeters T4 and T5, the alarm circuit, the detection circuit, and the power inputs of power switches S1, S2, and S3. Before testing, the operator inserts the fixing holes on either side of the fixed housing of the diaphragm air pump 5 into the two fixing bolts 21 and secures them with nuts. The rear and front ends of the two metal hose connectors are connected to the intake and exhaust pipes of the diaphragm air pump 5, respectively (these operations are reversed after testing to complete the test). The front ends of the two metal hose connectors are connected to the front ends of the two connecting pipes 102. Once powered, the voltmeter V displays voltage data in real time. When it is necessary to test the input and output gas flow and input and output gas pressure of the diaphragm air pump 5, turn on the power switches of the solenoid valves DC2 and DC3, and insert the power plug of the diaphragm air pump 5 into the power socket XZ. After the diaphragm air pump 5 is powered on, it will inhale the external air through the intake pipe and discharge it through the exhaust pipe. During the process of air inflow and outflow (the air enters the intake pipe of the diaphragm air pump 5 through the solenoid valve DC2 and the left end connecting pipe 102, and then passes through the exhaust pipe of the diaphragm air pump 5, the right end connecting pipe 102, and the solenoid valve DC3 output), pin 3 of the flowmeter T4 will output the air flow voltage data (the greater the flow, the higher the voltage signal, and vice versa) of the air intake pipe of the diaphragm air pump 5 to pin 5 of the single-chip module; when the gas pressure output from the exhaust pipe of the diaphragm air pump 5 is large, the voltage signal output to pin 3 of the positive pressure sensor T2 is higher, and vice versa; when the air flow output from the diaphragm air pump 5 is large, the voltage signal output to pin 6 of the flowmeter T5 is higher, and vice versa. When it is necessary to detect the negative pressure suction of the diaphragm air pump 5, turn off the power switch S2 of the solenoid valve DC2. In this way, the valve core of the solenoid valve DC2 is closed when it loses power. Turn on the power switch S3 of the solenoid valve DC3. The valve core of the solenoid valve DC3 is opened when it is energized. After the diaphragm air pump 5 is energized, negative pressure suction is generated in its intake pipe. The greater the suction generated by the diaphragm air pump 5 (the greater the negative pressure), the higher the voltage signal output from pin 3 of the negative pressure sensor T3 to pin 4 of the single-chip module T6, and vice versa (at the same time, the flow meter T4 outputs a flow voltage signal to pin 5 of the single-chip module T6).When it is necessary to test the pressure-maintaining performance of the diaphragm air pump 5 (that is, to test the sealing of the housing, etc.), the power switches of the solenoid valves DC2 and DC3 are turned off, and the power switch S1 of the solenoid valve DC1 is turned on. The valve core of the solenoid valve DC1 is energized to open, allowing the compressed air in the air compressor tank to enter the housing of the diaphragm air pump 5. The solenoid valve DC1 is then closed, and pin 3 of the positive pressure sensor T2 outputs a voltage signal to pin 3 of the single-chip microcomputer module T6 (the higher the pressure, the higher the voltage signal, and vice versa). Through the above, the present invention can obtain various data of the diaphragm air pump 5 under different test conditions by observing the flow rate and pressure data displayed on the display screen of the single-chip microcomputer module T6.

[0022] Figure 1 、 2 As shown in Figures 3 and 4, when the pressure-maintaining performance test of the diaphragm air pump 5 is carried out, the air pressure inside the diaphragm air pump 5 is higher than a certain level (indicating good sealing performance), the voltage signal output by pin 3 of the positive pressure sensor T2 is divided by the adjustable resistor RP1 and the resistor R1 and enters pin 2 of the three-terminal voltage detector T7, which is higher than its internal 4.75V threshold voltage. Pin 1 of the three-terminal voltage detector T7 outputs a high level, and the transistor Q1 will not be turned on. Then, the alarm B will not be powered on and will not work. When the pressure-maintaining performance test of the diaphragm air pump 5 is being conducted, the air pressure inside the diaphragm air pump 5 is lower than a certain level (indicating that the sealing performance is poor), the voltage signal outputted by the 3rd pin of the positive pressure sensor T2 is divided by the adjustable resistor RP1 and the resistor R1 and enters the 2nd pin of the three-terminal voltage detector T7, which is lower than its internal 4.75V threshold voltage. The 1st pin of the three-terminal voltage detector T7 outputs a low level, which is reduced and limited by the resistor R2 and enters the base of the transistor Q1. The transistor Q1 will turn on the collector and output a low level to the positive power input terminal of the alarm B. Then, the alarm B will be energized and sound, reminding the staff whether the sealing of the diaphragm air pump 5 is good, and the test process can be ended as soon as possible.

[0023] Figure 1 、 2 As shown in Figures 3 and 4, through all the above technical solutions, the present invention can detect the input and output flow rates of the diaphragm air pump per unit time, as well as the input and output pressure data and the negative pressure data generated, by simply switching the power switch. It can also detect the pressure holding data per unit time and, if the pressure holding data is abnormal, promptly prompt the staff to end the detection process through an alarm. This new invention brings convenience to the staff and achieves the technical effect of more comprehensive detection data. Figure 3In the figure, power module T1 is a finished product of an AC 220V drilled DC 12V switching power supply module; solenoid valves DC1, DC2, and DC3 are 2W normally closed valve core solenoid valves; microcontroller module T6 is model STM32F103C8T6; resistors R1 and R2 have resistances of 5K and 1K respectively; transistor Q1 is model 9012 (PNP type); adjustable resistor RP1 has resistance of 10K (adjustable to 2K); positive pressure sensor T2 is a finished product of a pressure transmitter model LU-THG, which has two power input terminals and a signal output terminal. The greater the detected pressure, the higher the voltage signal output by the signal output terminal, and vice versa (the output voltage signal changes dynamically from 0-10V). Flowmeters T4 and T5 are finished gas flow sensors, model HBT3697, with two power inputs and one signal output. A higher flow rate results in a higher voltage signal, while a lower flow rate results in a lower voltage signal (a dynamically changing 0-5V voltage signal). Negative pressure sensor T3 is a finished negative pressure sensor, model PCM300, with two power inputs and one signal output. A higher negative pressure results in a higher voltage signal, while a lower negative pressure results in a lower voltage signal (a dynamically changing 0-10V voltage signal). Three-terminal voltage detector T7 is model AN051A. Alarm B is a finished active continuous sound alarm, model FW-12V. The aforementioned electrical components are all existing, mature technologies, and this application will not elaborate on their operating principles.

[0024] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

[0025] In addition, it should be understood that although this specification is described in terms of implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A diaphragm air pump performance test device, comprising a positive pressure sensor, a negative pressure sensor, a solenoid valve, an air compressor, a workbench, a single-chip microcomputer module, a test fixture, a flow meter, a voltmeter, and a hose connector, characterized in that: It also has a detection circuit and an alarm circuit; there is an isolation board inside the workbench, the single-chip computer module, the detection circuit and the alarm circuit, and the voltmeter are fixedly installed at the upper end of the workbench, and the air compressor is fixedly installed at the lower end of the workbench; at least two connecting pipes are fixedly installed on one side of the front end of the workbench, there are multiple solenoid valves, there are at least two sets of flow meters, the positive pressure sensor, the negative pressure sensor, and the solenoid valve are fixedly installed on the partition, the first end and the second end of a three-way pipe are fixedly connected to one end of the first solenoid valve and one end of the second solenoid valve respectively; the other end of the first solenoid valve is fixedly connected to the exhaust pipe of the air tank of the air compressor, the third end of the three-way pipe is fixedly connected to one end of the first set of flow meters, and the other end of the first set of flow meters is connected to one of them The rear side of the tube is connected through a first pipeline, the intake pipe of the negative pressure sensor is fixedly installed on the first pipeline, one end of the third solenoid valve is fixedly connected to one end of the second set of flow meters, the other end of the second set of flow meters is connected to the rear side of the other connecting pipe through a second pipeline, and the intake pipe of the positive pressure sensor is fixedly installed on the second pipeline; the front sides of the two connecting pipes have external threads, and the test fixing seat is fixedly installed on one side of the table top of the workbench; the signal output ends of the flow meter, positive pressure sensor, and negative pressure sensor are electrically connected to the multi-channel signal input end of the single-chip microcomputer module, the signal output end of the positive pressure sensor is electrically connected to the signal input end of the detection circuit, and the signal output end of the detection circuit is electrically connected to the signal input end of the alarm circuit.

2. A diaphragm air pump performance testing device according to claim 1, characterized in that: The side end of the test fixing seat is provided with a fixing bolt, and the diaphragm air pump to be tested is installed on the test fixing seat and fixed by a nut.

3. A diaphragm air pump performance testing device according to claim 1, characterized in that: The solenoid valve is a normally closed spool solenoid valve.

4. A diaphragm air pump performance testing device according to claim 1, characterized in that: The rear ends of the two metal hose connectors are respectively connected to the air inlet pipe and the exhaust pipe of the diaphragm air pump being tested, and the front ends of the two metal hose connectors are respectively connected to the front ends of the two connecting pipes.

5. The diaphragm air pump performance testing device according to claim 1, characterized in that: The detection circuit includes an electrically connected adjustable resistor and a resistor, wherein the adjustable resistor is connected to one end of the resistor.

6. A diaphragm air pump performance testing device according to claim 1, characterized in that: The alarm circuit includes an electrically connected three-terminal voltage detector, a resistor, a transistor and an alarm, the negative power input terminal of the alarm is connected to the negative power input terminal of the three-terminal voltage detector, the output terminal of the three-terminal voltage detector is connected to one end of the resistor, the other end of the resistor is connected to the base of the transistor, and the positive power input terminal of the alarm is connected to the collector of the transistor.

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