Flow detection device for small and medium-sized air compressors
By designing a flow detection device for air compressors with multi-volume gas storage tanks and ASME nozzles, the problem of insufficient versatility of air compressor detection devices is solved, and efficient and convenient detection of air compressors of different specifications and models is achieved.
Patent Information
- Application Number
- CN202511049640.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-08-26
AI Technical Summary
The existing air compressor detection devices are low in versatility and cannot adapt to air compressors of different specifications and models, resulting in waste of resources and high inspection costs.
A flow detection device for a small and medium-sized air compressor is designed, including a gas storage tank of multiple volumes and ASME nozzles with corresponding diameters, and is equipped with a steady flow tube. The gas pressure, temperature and pressure difference value are detected in real time by touching the display screen to achieve rapid switching detection.
It realizes universal inspection of air compressors of different specifications and models, reduces operation difficulty and cost, and improves the convenience and accuracy of inspection.
Smart Images
Figure CN120537705A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of air compressor detection, and more particularly to a flow detection device for small and medium-sized air compressors. Background Art
[0002] An air compressor is a mechanical device that converts the mechanical energy of an electric motor into gas pressure energy. Its core function is to compress air to increase gas pressure, storing the compressed high-pressure gas in a tank or delivering it directly to gas-consuming equipment to meet the demand for power or process gas in industrial production, daily life, and other fields. Air compressors are widely used in many fields, including industry, manufacturing, energy, healthcare, and food.
[0003] The ASME nozzle is a high-precision flow measurement device that utilizes a throat pressure or long-neck nozzle structure and operates based on the principle of a throttling flow sensor. Its core advantage lies in its unique throat pressure method, which ensures a stable and highly repeatable discharge coefficient. Specifically, the ASME nozzle modifies the fluid velocity and pressure through the throttling effect, accurately measures the pressure differential using the throat pressure method, and calculates the flow rate using fluid dynamics formulas. ASME nozzle testing technology is often used in air compressor testing processes to evaluate the performance of finished air compressors.
[0004] Because air compressors vary in capacity, power, and size, testing portable air compressors often requires tanks of varying capacities and ASME nozzles. Smaller tanks and smaller ASME nozzles correspond to lower-power air compressors, while larger tanks and larger ASME nozzles correspond to higher-power air compressors. This often requires air compressor manufacturers to design specialized testing devices for each compressor size, resulting in a unique testing device for each compressor size. This results in a significant waste of resources for manufacturers, and the market, lacking a universal testing device, relies solely on the manufacturer's own testing. Summary of the Invention
[0005] In order to solve the above technical problems, the present invention proposes a more universal flow detection device for small and medium-sized air compressors, which can meet the detection requirements of air compressor bodies of different specifications and models, is conducive to controlling detection costs, simplifies detection operations, makes detection more convenient and reduces operational difficulty.
[0006] To achieve the above object, the present invention adopts the following technical solutions: A flow detection device for a small or medium-sized air compressor, comprising: The tank assembly includes at least two gas storage tanks, each with a different volume; each gas storage tank is respectively equipped with a first pressure gauge and a first thermometer for detecting the pressure and temperature of the gas in the tank; the gas inlet of the tank body can be connected to the gas outlet of the air compressor to be tested through an air inlet pipe, and the gas inlet pipes are respectively detachably connected to each other; the compressed gas in the input tank can be respectively delivered to the gas inlets of the two matching flow stabilizing pipes through the gas outlet of the tank body connected to the external gas delivery pipeline; The flow stabilizing tubes are grouped in pairs, with multiple sets provided. Each gas storage tank is equipped with a set of two flow stabilizing tubes, one for use and one for backup. The outlet of each flow stabilizing tube can be detachably fitted with an ASME nozzle, and the outlet end of the tube is equipped with a differential pressure gauge and a second thermometer for detecting the outlet pressure difference and outlet temperature of the ASME nozzle. The gas delivery pipeline is provided with two parallel branches. The input ends of the two branches are detachably connected to the two outlets of the three-way ball valve, and the output ends are detachably connected to the air inlets of two flow stabilizing tubes, with a flow stabilizing switch provided between them. The inlet of the three-way ball valve is detachably connected to the air outlet of the gas storage tank. The second pressure gauge and the third thermometer are used to detect the ambient air pressure and the ambient temperature.
[0007] The structural characteristics of the present invention are also: In the detection device, a large-volume gas storage tank is matched with a flow stabilizing tube with a large-diameter ASME nozzle, and a small-volume gas storage tank is matched with a flow stabilizing tube with a small-diameter ASME nozzle.
[0008] Gas storage tanks are divided into two categories: one is a large tank with a capacity of 25-50L, and the outlet of the accompanying flow stabilizing tube is connected to an ASME nozzle with a diameter of 6.35mm or 9.52mm; the other is a small tank with a capacity of 10-20L, and the outlet of the accompanying flow stabilizing tube is connected to an ASME nozzle with a diameter of 3.18mm or 4.76mm. According to GB / T15487-2015, it can be obtained that the flow stabilizing tube equipped with an ASME nozzle with a diameter of 6.35mm is matched with the large tank body and is used for a volume flow of 0.113-0.226m 3 / min air compressor, equipped with a 9.52mm diameter ASME nozzle flow stabilizer and a large tank body, for volume flow of 0.255-0.510m 3 / min air compressor testing, equipped with a 3.18mm diameter ASME nozzle flow stabilizer and small tank, for volume flow of 0.028-0.075m 3 / min air compressor testing, equipped with a 4.76mm diameter ASME nozzle flow stabilizer and small tank, for volume flow of 0.075-0.113m 3 / min air compressor detection.
[0009] The flow stabilizing tube is connected as a whole along the direction of airflow and is composed of a rectifier, a perforated plate, and a straight pipe section which are detachably connected in sequence. The inlet of the rectifier serves as the air inlet of the flow stabilizing tube, and the outlet of the straight pipe section serves as the air outlet of the flow stabilizing tube.
[0010] The system also includes a touchscreen display for receiving and displaying the pressure and temperature values detected by the first pressure gauge, first thermometer, second pressure gauge, second thermometer, and third thermometer, as well as the differential pressure value detected by the differential pressure gauge. The touchscreen display is also used to turn all test instruments on and off. All meters and the touchscreen display are electrically connected, capable of displaying real-time meter count and flow curves based on the values detected by each meter. The touchscreen display is an IT7150E model and is connected to the control unit.
[0011] An operating table is provided, which has an upper and lower structure and an operating panel. Multiple gas storage tanks are respectively mounted on the upper table of the operating table through tank brackets, and multiple flow stabilizing tubes are respectively mounted on the lower table of the operating table through tube brackets. The air compressor to be tested is placed on the upper table, and the touch display screen is installed on the operating panel.
[0012] The gas delivery pipeline and the two outlets of the three-way ball valve, the inlet of the three-way ball valve and the gas outlet of the gas tank, and the gas delivery pipeline and the inlet of the steady flow switch are detachably connected in a threaded manner through pipes and copper sleeve joints, and the air inlet pipe and the gas inlet of the gas tank and the gas outlet of the air compressor body are detachably connected.
[0013] In the flow stabilizing tube, the rectifier and the perforated plate, and the perforated plate and the straight pipe section are respectively assembled detachably via flanges and bolts. The inlet of the rectifier and the outlet of the flow stabilizing switch are threadedly connected via pipes and copper sleeve joints. The outlet of the straight pipe section and the ASME nozzle are assembled detachably via flanges and bolts.
[0014] Compared with the existing technology, the beneficial effects of the present invention are embodied in: The present invention overcomes the defects of low versatility and small scope of application of existing detection devices. In order to match air compressor bodies of different specifications and models, gas storage tanks of various volumes are configured, and two flow stabilizers are configured for each gas storage tank of each volume. Each flow stabilizer can be installed with an ASME nozzle of corresponding caliber. During detection, the pressure value and temperature value of the gas in the tank and the pressure difference value and temperature value of the gas in the tube can be detected in real time through the first pressure gauge and the first thermometer of the gas storage tank, the pressure difference gauge and the second thermometer of the flow stabilizer. The ambient air pressure and ambient temperature are detected by the second pressure gauge and the third thermometer. The detection values are fed back to the touch display screen for display. The detection data can be used to calculate relevant performance parameters of the air compressor and to make an overall evaluation of the air compressor performance. Moreover, the two flow stabilizers in each group are used in one and reserved in the other, and can be quickly switched through a three-way ball valve. They can be used for the successive detection of two air compressors, making the detection operation more convenient, reducing the difficulty of operation, and being conducive to the good control of the air compressor detection cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of another perspective of the present invention; Figure 3 It is a structural diagram of the flow-stabilizing tube.
[0016] In the picture: 1. Air compressor to be tested; 21 gas storage tank; 211 tank air inlet; 22 first pressure gauge; 23 first thermometer; 31 flow stabilizing tube; 311 rectifier; 312 perforated plate; 313 straight pipe section; 32 flow stabilizing switch; 33 ASME nozzle; 34 differential pressure gauge; 35 second thermometer; 4 gas delivery pipeline; 41 branch line; 5 three-way ball valve; 61 second pressure gauge; 62 third thermometer; 7 touch screen display; 8 operating table; 81 upper table; 82 lower table; 83 operating panel. DETAILED DESCRIPTION
[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0018] Example 1 The volume flow of the air compressor to be tested is 0.032m3 / min, the product power is 550W, hereinafter referred to as No. 1 air compressor.
[0019] A small gas tank with a capacity of 15L was selected, hereinafter referred to as gas tank No. 1, and a flow stabilizer tube was equipped with an ASME nozzle with a diameter of 3.18mm, hereinafter referred to as flow stabilizer No. 1.
[0020] During testing: Turn on the touch screen, turn on all meters, look up the constant C, enter the constant C into the touch screen and feed it back to the control component, the current ambient air pressure value and ambient temperature The second pressure gauge detects and feeds back to the touch screen; Open the three-way ball valve corresponding to gas tank No. 1, connect the branch of the gas delivery pipeline connected to the No. 1 flow stabilizing pipe, turn on the flow stabilizing switch corresponding to the No. 1 flow stabilizing pipe, and do not connect the other branch of the gas delivery pipeline. The flow stabilizing switch of the corresponding flow stabilizing pipe remains closed, so that gas tank No. 1 is connected only to the No. 1 flow stabilizing pipe through the gas delivery pipeline; Connect the air outlet of No. 1 air compressor to the air inlet of No. 1 gas tank through the air inlet pipe, start No. 1 air compressor, and the compressed gas output by No. 1 air compressor will flow into No. 1 gas tank. The gas pressure in the tank will be With gas temperature The first pressure gauge and the first thermometer detect and feed back to the touch screen for display; The compressed gas in the No. 1 gas storage tank enters the No. 1 flow stabilizing tube through the branch of the gas transmission pipeline, and enters the straight pipe section after the rectifier stabilizes the flow. The gas pressure difference in the straight pipe section With gas temperature The pressure is detected by the differential pressure gauge and the third thermometer and fed back to the touch screen for display. The compressed gas in the flow-stabilizing tube is discharged to the outside through the ASME nozzle. When all values become stable and no longer fluctuate significantly, record the flow rate. .
[0021] According to the "Measurement Method of Flow Rate of Positive Displacement Compressors" (GB / T15487-2015): Where, is the volume flow of the air compressor, C is a constant, which can be obtained by looking up the table according to GB / T15487-2015, d is the ASME nozzle diameter, is the gas temperature in the gas tank, is the gas pressure difference in the straight section of the steady flow tube, is the gas temperature in the straight section of the steady flow tube, is the ambient air pressure value.
[0022] Example 2 The volume flow of the air compressor to be tested is 0.065m 3 / min, the product power is 950W, hereinafter referred to as No. 2 air compressor.
[0023] A small gas storage tank with a capacity of 15 L was selected. The No. 1 gas storage tank in Example 1 was still used. A flow stabilizer corresponding to the other branch of the gas delivery pipeline in Example 1 was used and equipped with a 4.76 mm caliber ASME nozzle, hereinafter referred to as the No. 2 flow stabilizer.
[0024] After the detection work of Example 1 is completed, the detection of this example begins: Turn on the touch screen, turn on all meters, look up the constant C, enter the constant C into the touch screen and feed it back to the control component, the current ambient air pressure value and ambient temperature The second pressure gauge detects and feeds back to the touch screen; Switch the three-way ball valve corresponding to the No. 2 gas storage tank to connect the branch of the gas delivery pipeline to the No. 2 flow stabilizing tube, turn on the flow stabilizing switch corresponding to the No. 2 flow stabilizing tube, and do not connect the branch of the gas delivery pipeline to the No. 1 flow stabilizing tube. The flow stabilizing switch of the corresponding flow stabilizing tube remains closed, so that the No. 1 gas storage tank is connected only to the No. 2 flow stabilizing tube through the gas delivery pipeline; Connect the air outlet of No. 2 air compressor to the air inlet of No. 2 gas storage tank through the air inlet pipe, start No. 2 air compressor, and the compressed gas output by No. 2 air compressor will be fed into No. 2 gas storage tank. The gas pressure in the tank will be With gas temperature The first pressure gauge and the first thermometer detect and feed back to the touch screen for display; The compressed gas in the No. 2 gas storage tank enters the No. 2 flow stabilizing tube through the branch of the gas transmission pipeline, and enters the straight pipe section after being stabilized by the rectifier. The gas pressure difference in the straight pipe section With gas temperature The pressure is detected by the differential pressure gauge and the third thermometer and fed back to the touch screen for display. The compressed gas in the flow-stabilizing tube is discharged to the outside through the ASME nozzle. When all values become stable and no longer fluctuate significantly, record the flow rate. .
[0025] According to the "Measurement Method of Flow Rate of Positive Displacement Compressors" (GB / T15487-2015), it can be known that: Where, is the volume flow of the air compressor, C is a constant, which can be obtained by looking up the table according to GB / T15487-2015, d is the ASME nozzle diameter, is the gas temperature in the gas tank, is the gas pressure difference in the straight section of the steady flow tube, is the gas temperature in the straight section of the steady flow tube, is the ambient air pressure value.
[0026] Example 3 The volume flow of the air compressor to be tested is 0.12m 3 / min, the product power is 1800W, hereinafter referred to as No. 3 air compressor.
[0027] A large gas tank with a capacity of 50L was selected, hereinafter referred to as gas tank No. 2, and a flow stabilizer tube was equipped with an ASME nozzle with a diameter of 6.53mm, hereinafter referred to as flow stabilizer tube No. 3.
[0028] During testing: Turn on the touch screen, turn on all meters, look up the constant C, enter the constant C into the touch screen and feed it back to the control component, the current ambient air pressure value and ambient temperature The second pressure gauge detects and feeds back to the touch screen; Open the three-way ball valve corresponding to gas tank No. 2, connect the branch of the gas delivery pipeline connected to the No. 3 steady flow pipe, turn on the steady flow switch corresponding to the No. 3 steady flow pipe, and do not connect the other branch of the gas delivery pipeline. The steady flow switch of the corresponding steady flow pipe remains closed, so that gas tank No. 2 is connected only to the No. 3 steady flow pipe through the gas delivery pipeline; Connect the air outlet of No. 3 air compressor to the air inlet of No. 2 gas tank through the air inlet pipe, start No. 3 air compressor, and the compressed gas output by No. 3 air compressor will be fed into No. 2 gas tank. The gas pressure in the tank will be With gas temperature The first pressure gauge and the first thermometer detect and feed back to the touch screen for display; The compressed gas in the No. 2 gas tank enters the No. 3 flow stabilizing tube through the branch of the gas transmission pipeline, and enters the straight pipe section after the rectifier stabilizes the flow. The gas pressure difference in the straight pipe section With gas temperature The pressure is detected by the differential pressure gauge and the third thermometer and fed back to the touch screen for display. The compressed gas in the flow-stabilizing tube is discharged to the outside through the ASME nozzle. When all values become stable and no longer fluctuate significantly, record the flow rate. .
[0029] According to the "Measurement Method of Flow Rate of Positive Displacement Compressors" (GB / T15487-2015): Where, is the volume flow of the air compressor, C is a constant, which can be obtained by looking up the table according to GB / T15487-2015, d is the ASME nozzle diameter, is the gas temperature in the gas tank, is the gas pressure difference in the straight section of the flow-stabilizing tube, is the gas temperature in the straight section of the steady flow tube, is the ambient air pressure value.
[0030] Example 4 The volume flow of the air compressor to be tested is 0.25m 3 / min, the product power is 3500W, hereinafter referred to as No. 4 air compressor.
[0031] A large gas storage tank with a capacity of 50 L was selected. The No. 2 gas storage tank in Example 3 was still used. A flow stabilizer corresponding to the other branch of the gas delivery pipeline in Example 3 was used and equipped with a 9.52 mm caliber ASME nozzle, hereinafter referred to as the No. 4 flow stabilizer.
[0032] After the detection work of Example 3 is completed, the detection of this example begins: Turn on the touch screen, turn on all meters, look up the constant C, enter the constant C into the touch screen and feed it back to the control component, the current ambient air pressure value and ambient temperature The second pressure gauge detects and feeds back to the touch screen; Switch the three-way ball valve corresponding to the No. 2 gas storage tank to connect the branch of the gas delivery pipeline to the No. 4 steady flow pipe, turn on the steady flow switch corresponding to the No. 4 steady flow pipe, and do not connect the branch of the gas delivery pipeline to the No. 3 steady flow pipe. The steady flow switch of the corresponding steady flow pipe remains closed, so that the No. 2 gas storage tank is connected only to the No. 4 steady flow pipe through the gas delivery pipeline; Connect the air outlet of No. 4 air compressor to the air inlet of No. 2 gas tank through the air inlet pipe, start No. 4 air compressor, and the compressed gas output by No. 4 air compressor will be fed into No. 2 gas tank. The gas pressure in the tank will be With gas temperature The first pressure gauge and the first thermometer detect and feed back to the touch screen for display; The compressed gas in the No. 2 gas storage tank enters the No. 4 flow stabilizing pipe through the branch of the gas transmission pipeline, and enters the straight pipe section after the rectifier stabilizes the flow. The gas pressure difference in the straight pipe section With gas temperature The pressure is detected by the differential pressure gauge and the third thermometer and fed back to the touch screen for display. The compressed gas in the flow-stabilizing tube is discharged to the outside through the ASME nozzle. When all values become stable and no longer fluctuate significantly, record the flow rate. .
[0033] According to the "Measurement Method of Flow Rate of Positive Displacement Compressors" (GB / T15487-2015), it can be known that: Where, is the volume flow of the air compressor, C is a constant, which can be obtained by looking up the table according to GB / T15487-2015, d is the ASME nozzle diameter, is the gas temperature in the gas tank, is the gas pressure difference in the straight section of the steady flow tube, is the gas temperature in the straight section of the steady flow tube, is the ambient air pressure value.
[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.
Claims
1. A flow detection device for small and medium-sized air compressors, characterized in that include: A tank assembly comprises at least two gas storage tanks (21), each gas storage tank (21) having a different volume; each gas storage tank (21) is respectively provided with a first pressure gauge (22) and a first thermometer (23) for detecting the pressure and temperature of the gas in the tank; an air inlet (211) of the tank body can be connected to the air outlet of the air compressor (1) to be detected via an air inlet pipe, and the air inlet pipes can be detachably connected to each other; the compressed gas in the input tank can be respectively transported to the air inlets of two matching flow stabilizing pipes (31) through the air outlet of the tank body of the external gas delivery pipeline (4); The flow stabilizing tubes (31) are grouped in pairs, and multiple groups are provided. Corresponding to each gas storage tank (21), a group of two flow stabilizing tubes (31) is matched, one for use and one for backup. The gas outlet of each flow stabilizing tube (31) can be detachably assembled with an ASME nozzle (33), and the gas outlet end of the tube body is provided with a pressure differential gauge (34) and a second thermometer (35) for detecting the gas outlet pressure difference and gas outlet temperature of the ASME nozzle (33); The gas delivery pipeline (4) is provided with two parallel branches (41), the input ends of the two branches (41) are detachably connected to the two outlets of the three-way ball valve (5), and the output ends are detachably connected to the air inlets of two flow stabilizing tubes (31), with a flow stabilizing switch (32) provided therebetween, and the inlet of the three-way ball valve (5) is detachably connected to the air outlet of the tank body of the gas storage tank (21); The second pressure gauge (61) and the third thermometer (62) are used to detect ambient air pressure and ambient temperature.
2. The flow detection device for small and medium-sized air compressors according to claim 1 is characterized in that: In the detection device, a large-volume gas storage tank (21) is matched with a flow stabilizing tube (31) with a large-caliber ASME nozzle (33), and a small-volume gas storage tank (21) is matched with a flow stabilizing tube (31) with a small-caliber ASME nozzle (33).
3. The flow detection device for small and medium-sized air compressors according to claim 1 or 2, characterized in that: Each gas storage tank (21) is divided into two categories, one is a large tank with a volume of 25-50L, and the ASME nozzle (33) connected to the gas outlet of the accompanying steady flow tube (31) has a diameter of 6.35mm or 9.52mm, and the other is a small tank with a volume of 10-20L, and the ASME nozzle (33) connected to the gas outlet of the accompanying steady flow tube (31) has a diameter of 3.18mm or 4.76mm; The flow stabilizing tube (31) equipped with an ASME nozzle (33) with a diameter of 6.35 mm is matched with a large tank and is used for a volume flow rate of 0.113-0.226 m 3 / min air compressor, equipped with a 9.52mm diameter ASME nozzle (33) of the flow stabilization tube (31) and a large tank body, for volume flow of 0.255-0.510m 3 / min air compressor, equipped with a flow stabilizing tube (31) with a 3.18mm diameter ASME nozzle (33) and a small tank, for a volume flow rate of 0.028-0.075m 3 / min air compressor test, equipped with a 4.76mm diameter ASME nozzle (33) of the flow stabilization tube (31) and a small tank body, for volume flow of 0.075-0.113m 3 / min air compressor detection.
4. The flow detection device for small and medium-sized air compressors according to claim 1, characterized in that: The flow stabilizing tube (31) is integrally connected along the direction of the airflow and is composed of a rectifier (311), a perforated plate (312), and a straight pipe section (313) which are detachably assembled in sequence. The inlet of the rectifier (311) serves as the air inlet of the flow stabilizing tube (31), and the outlet of the straight pipe section (313) serves as the air outlet of the flow stabilizing tube (31).
5. The flow detection device for small and medium-sized air compressors according to claim 1 is characterized in that: It also includes a touch display screen (7) for receiving and displaying the pressure values and temperature values detected by the first pressure gauge (22), the first thermometer (23), the second pressure gauge (61), the second thermometer (35), and the third thermometer (62), as well as the pressure difference value detected by the pressure difference gauge (34).
6. The flow detection device for small and medium-sized air compressors according to claim 1 or 5, characterized in that: An operating table (8) is provided. The operating table (8) is a top-bottom structure with an operating panel (83). A plurality of gas storage tanks (21) are respectively mounted on the upper table (81) of the operating table (8) through tank body brackets. A plurality of flow stabilizing tubes (31) are respectively mounted on the lower table (82) of the operating table (8) through tube body brackets. The air compressor (1) to be tested is placed on the upper table (81). A touch screen (7) is mounted on the operating panel (83).