Split type axial flow fan rotating speed measuring device

Abstract

The utility model belongs to the field of building measurement, and particularly relates to a split type axial flow fan rotating speed measuring device which comprises an acquisition unit and a receiving unit. The acquisition unit comprises a support frame, a measurement shell arranged on the support frame, a circuit board arranged in the measurement shell and a data collection sensor; the data collection sensor comprises a control processor, and a power supply module, a distance test module, a rotating speed test module and a Bluetooth transmitting module which are connected with the control processor; and the Bluetooth transmitting module is wirelessly connected with the Bluetooth receiving module of the receiving unit. According to the split type axial flow fan rotating speed measuring device, split type design is adopted, the collecting unit and the receiving unit are arranged in a split mode, it can be ensured that personnel are located outside an air inlet / exhaust pipeline danger area of the axial flow fan rotating at a high speed in the detection process, and the safety problem in the traditional speed measuring process is solved.

Description

Technical Field

[0001] The utility model belongs to the field of building measurement, and in particular relates to a split-type axial flow fan speed measuring device. Background Art

[0002] According to the requirements of JGJ / T260-2011 "Technical Regulations for Inspection of Heating, Ventilation and Air Conditioning Engineering", when detecting the speed of axial flow fans, the speed detection point should directly measure the speed of the axial flow fan main shaft. The main shaft of the axial flow fan is located inside the casing. At present, the measurement equipment of axial flow fan speed is divided into two categories: contact and non-contact. At the same time, non-contact tachometers have the characteristics of stable performance, high measurement accuracy and safety and reliability. Therefore, non-contact tachometers are widely used in on-site detection of fan speed in the ventilation system of civil air defense projects.

[0003] In the ventilation system of civil air defense projects, axial flow fans are mainly composed of impellers, motors and casings. Axial flow fans are widely used in wartime clean air intake and exhaust systems due to their easy installation and use, strong adaptability and versatility. The rotational speed is one of the key parameters for measuring the performance of axial flow fans. By measuring the rotational speed, we can understand the relationship between the air volume, air pressure and power of the axial flow fan, which plays a role in ensuring the safe operation of the axial flow fan and preventing equipment failure or damage caused by abnormal rotational speed.

[0004] When measuring the speed of an axial fan, stick reflective paper on the main shaft of the fan to be measured. Fix the tachometer in a stable position so that the laser emission and receiving windows of the tachometer are between 50 and 200 mm relative to the object to be measured. Press the on / off button to turn on the tachometer, which enters the speed range by default. Aim the laser at the reflective paper on the main shaft of the fan to be measured, start the fan to be measured, and the tachometer will display the speed of the fan to be measured.

[0005] Currently, all non-contact tachometers available on the market are handheld, all-in-one devices that lack distance measurement and supporting devices. When measuring the speed of high-volume axial flow fans, the tachometer is limited by the test distance requirement and needs to be installed within 200mm of the axial measurement section at the soft connection between the fan inlet / outlet and the ventilation duct. The turbulent airflow at the inlet and outlet of the axial flow fan is large, which can easily cause the tachometer's test position to deviate and the reading data to be inaccurate. The impact of the tachometer's measurement position change on the test accuracy cannot be quantified, greatly reducing the accuracy and first-time success rate of the fan speed measurement data. Most axial flow fans are fixed using ceiling installation. When the axial flow fan body is opened without a soft connection, axial displacement will occur. The tachometer and the fan main shaft measurement point must also be tested in an unobstructed state. Personnel or equipment operators are in the danger zone of the axial flow fan's inlet / exhaust duct, which is prone to safety accidents. Utility Model Content

[0006] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a split-type axial flow fan speed measuring device.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A split-type axial fan speed measuring device includes an acquisition unit and a receiving unit; the acquisition unit includes a support rod, a measuring shell arranged on the support rod, a circuit board arranged in the measuring shell, and a data collection sensor; the data collection sensor includes a control processor, a power module connected to the control processor, a distance test module, a speed test module, and a Bluetooth transmitter module; the Bluetooth transmitter module is wirelessly connected to the Bluetooth receiver module of the receiving unit.

[0009] The speed test module is a photoelectric test module, which includes a photoelectric sensor circuit arranged on the circuit board and a photoelectric probe connected to the photoelectric sensor circuit; a photoelectric probe through hole matching the photoelectric probe is provided on the measurement housing.

[0010] The distance testing module is an infrared distance testing module; the distance testing module comprises a distance sensing circuit and an infrared probe arranged on the circuit board; the measuring housing is provided with a photoelectric probe through hole matching the infrared probe.

[0011] The support rod includes a long rod and a short rod; the long rod and the short rod are hingedly connected;

[0012] An extension rod interface is provided at the bottom of the support rod.

[0013] A detachable cover is provided on the top of the measuring housing.

[0014] The measuring housing is provided with a power indicator light, a Bluetooth connection indicator light, a main switch key, a distance test switch key and a speed measurement switch key.

[0015] The battery module is arranged at the bottom of the inner side of the measuring shell; and a detachable battery compartment protective cover is provided on the bottom surface of the measuring shell.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The split-type axial flow fan speed measuring device of the present invention is designed in a split style, and the acquisition unit and the receiving unit are placed separately, which can ensure that personnel are outside the dangerous area of ​​the inlet / exhaust duct of the high-speed axial flow fan during the detection process, and solve the safety problems in the traditional speed measurement process; at the same time, the device of the present application also has the function of distance measurement. When measuring the speed of the axial flow fan, the accuracy of its installation position can be determined, and the distance measurement data can be used to intuitively judge whether the distance between the measuring device and the measured object is within the range of 50-200mm. At the same time, the original data also facilitates data tracing, thereby improving the accuracy of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the overall appearance of the split-type axial fan speed measuring device;

[0019] Figure 2-4 This is a schematic diagram of the structure of the acquisition unit of a split-type axial flow fan speed measurement device;

[0020] Figure 5 This is a schematic diagram of the module connection of the split axial fan speed measurement device. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and the best embodiment.

[0022] Figure 1-5 A split-type axial fan speed measurement device is shown, comprising a data acquisition unit and a receiving unit 20. The data acquisition unit comprises a support rod 7, a measuring housing 10 mounted on the support rod, a circuit board 9 disposed within the housing, and a data collection sensor. The data collection sensor comprises a control processor, a power module connected to the control processor, a distance measurement module, a speed measurement module, and a Bluetooth transmitter module. The Bluetooth transmitter module is wirelessly connected to the Bluetooth receiver module of the receiving unit. The modules included in the data collection sensor are all conventional modules and are not described in detail here.

[0023] The speed test module is a photoelectric test module, which includes a photoelectric sensor circuit arranged on the circuit board and a photoelectric probe 12 connected to the photoelectric sensor circuit; the measurement housing is provided with a photoelectric probe through hole 6 matching the photoelectric probe.

[0024] The distance testing module is an infrared distance testing module; the distance testing module includes a distance sensing circuit and an infrared probe 11 arranged on the circuit board; the measurement housing is provided with a photoelectric probe through hole 6 matching the infrared probe.

[0025] The support rod 7 includes a long rod and a short rod; the long rod and the short rod are connected by a hinge 14; an extension rod interface is provided at the bottom of the support rod, and other rod-shaped objects are further connected through the extension rod interface 15 to extend the overall support rod.

[0026] A detachable cover 2 is provided on the top of the measuring housing 10 , and the cover 2 is mounted on the measuring housing 10 using countersunk bolts.

[0027] The measuring housing is equipped with a power indicator light 3, a Bluetooth connection indicator light 4, a main switch 1, a distance measurement switch, and a speed measurement switch (not shown). The battery module is located at the bottom of the inner side of the measuring housing; the bottom surface of the measuring housing is provided with a removable battery compartment protective cover 13.

[0028] The implementation process of this utility model is:

[0029] The detachable protective cover 2 is fixed to the measuring housing 10 by 4 cross countersunk screws and can be freely disassembled to facilitate the maintenance and replacement of electrical components in the module; the circuit board 9 is fixed to the measuring housing 10 by 3 cross countersunk screws, and the components in the circuit board 9 are respectively connected to the photoelectric probe 12, the infrared probe 11, the switch key 1, the power display light 3, the Bluetooth connection display light 4, the distance test switch key and the speed measurement switch key; the detachable battery compartment protective cover 13 is fixed to the measuring housing 10 by 1 cross countersunk screw and can be freely disassembled to facilitate the replacement of the battery; the top of the support rod 7 is threadedly connected to the groove on the measuring housing 10, and the bottom end of the support rod 7 can be extended in length through the extension rod connection hole 15. The long rod and the short rod of the support rod 7 adopt an adjustable hinge connection 14 to increase the ability to adapt to complex detection positions; the long rod is provided with a connecting groove and the short rod is provided with a connecting block, and the long rod screw bolt 8 is used to connect the connecting groove and the connecting block to achieve hinged connection.

[0030] Before measurement, first connect the lower end connection hole of the measuring shell 10 to the support rod 7 with a threaded connection. The long rod and the short rod of the support rod 7 should be kept vertical. If the axial flow fan is installed at a high height, the length can be extended to the test position through the extension rod interface 15. Then press the main switch key 1 and enter the power-on state. The Bluetooth transmitting module is wirelessly connected to the Bluetooth receiving module of the receiving unit. When the Bluetooth connection indicator light 4 remains on, the Bluetooth communication connection is successful. Stick the reflective paper on the main shaft of the axial flow fan to be tested. According to the position of the reflective sticker on the main shaft of the axial flow fan to be tested and The test operation space selects an axial position perpendicular to the main shaft section to place the measuring housing 10, ensuring that the distance between the photoelectric probe through hole 6 and the photoelectric probe through hole 6 and the reflective paper is maintained between 50 and 200 mm and the horizontal angle is not greater than 30°. Press the distance test switch key and the speed measurement switch key to enter the distance and speed measurement mode. After the command is transmitted from the control processor to the Bluetooth transmitter module, it is transmitted to the Bluetooth receiving module through the Bluetooth transmitter module. The Bluetooth receiving module transmits the signal to the processor and the display. After the measured value stabilizes, record the test data and fill in the original record.

[0031] To sum up, the split-type axial flow fan speed measuring device of the utility model is designed in a split style, and the acquisition unit and the receiving unit are separated, which can ensure that personnel are outside the dangerous area of ​​the inlet / exhaust duct of the high-speed axial flow fan during the detection process, and solve the safety problems in the traditional speed measurement process; at the same time, the device of the present application also has the function of distance measurement. When measuring the speed of the axial flow fan, it can accurately determine the installation position and intuitively judge whether the distance between the measuring device and the measured object is within the range of 50-200mm through the distance measurement data. At the same time, the original data also facilitates data tracing, thereby improving the accuracy of the data.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A split-type axial flow fan speed measuring device, characterized in that: It includes an acquisition unit and a receiving unit; the acquisition unit includes a support rod, a measuring shell arranged on the support rod, a circuit board arranged in the measuring shell, and a data collection sensor; the data collection sensor includes a control processor, a power module connected to the control processor, a distance test module, a speed test module and a Bluetooth transmission module; the Bluetooth transmission module is wirelessly connected to the Bluetooth receiving module of the receiving unit.

2. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: The speed test module is a photoelectric test module, which includes a photoelectric sensor circuit arranged on the circuit board and a photoelectric probe connected to the photoelectric sensor circuit; a photoelectric probe through hole matching the photoelectric probe is provided on the measurement housing.

3. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: The distance testing module is an infrared distance testing module; the distance testing module comprises a distance sensing circuit and an infrared probe arranged on the circuit board; the measuring housing is provided with a photoelectric probe through hole matching the infrared probe.

4. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: The support rod comprises a long rod and a short rod; the long rod and the short rod are connected in a hinged manner.

5. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: An extension rod interface is provided at the bottom of the support rod.

6. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: A detachable cover is provided on the top of the measuring housing.

7. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: The measuring housing is provided with a power indicator light, a Bluetooth connection indicator light, a main switch key, a distance test switch key and a speed measurement switch key.

8. The split-type axial flow fan speed measuring device according to claim 1, characterized in that: The battery module is arranged at the bottom of the inner side of the measuring shell; and a detachable battery compartment protective cover is provided on the bottom surface of the measuring shell.

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