CN217765089U - Telescopic air volume measuring device - Google Patents

Abstract

The utility model discloses a telescopic amount of wind measuring device, including measuring device head and telescopic pipe shaft, the measuring device head sets up the end that stretches out at telescopic pipe shaft. The utility model discloses make into freely concertina type with the measuring stick, adjust its length through telescopic pipe shaft, then carry out amount of wind, wind speed measurement, its measurement face that conveniently carries, is applicable to not unidimensional cross-section, and can maintain the high accuracy measurement.

Description

Telescopic amount of wind measuring device

Technical Field

The utility model relates to a telescopic amount of wind measuring device is applicable to the technical field of the interior amount of wind of pipeline, wind speed test, is applicable to the great test condition of amount of wind measurement face width.

Background

The gas flow rate measuring instrument mainly comprises: pitot tubes, propeller anemometers, thermal ball anemometers, laser anemometers, and the like. In engineering applications, a pitot tube is generally used to measure the flow velocity and flow rate of gas in a pipeline. A pitot tube is a tubular device that measures the total pressure and static pressure of an airflow to determine the velocity of the airflow. The device has the advantages of high reliability, low cost, good durability, simple and convenient use and the like, and is suitable for the conditions of strict requirements on the test process and accurate conclusion requirements.

The pitot tube can measure the velocity of the gas at a point along the cross-section of the pipe, and if the pitot tube is used to measure the average flow velocity along the cross-section of the pipe, the following method is used to determine the average flow velocity along the cross-section of the pipe. For a circular pipeline, the cross section of the circular pipeline can be divided into a plurality of concentric circular rings with equal areas, reading is carried out on the central position of each ring, and then the average value of the readings is taken to obtain the average flow velocity. For a rectangular pipe, the measurement cross-section may be divided into several small rectangles of equal area, the flow velocity is measured at the center of each small rectangle, and then the flow velocity is averaged.

Therefore, when the device is faced with a complicated test environment on the site, the section size of partial air volume measurement is large, so that the required measuring device is long, and the device is not easy to carry and inconvenient to use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a telescopic amount of wind measuring device makes into the measuring stick can freely stretch out and draw back the type, through fixed and slider's recess and protruding its length of adjusting, then carries out amount of wind, wind speed measurement, and its measurement face that conveniently carries, is applicable to not unidimensional cross-section, and can maintain the high accuracy measurement.

The utility model discloses a following technical scheme realizes:

the utility model provides a telescopic amount of wind measuring device, includes measuring device head and telescopic pipe shaft, and the measuring device head sets up the end that stretches out at telescopic pipe shaft.

The utility model discloses further improvement lies in, and telescopic pipe body is the tubular metal resonator of the nested formula of three-layer, and each section pipe body is nested in proper order.

The utility model discloses further improvement lies in, and telescopic pipe shaft is fixed and is slided through recess and the arch that sets up on the pipe shaft between two sections adjacent pipe shafts including the pipe shaft first section, pipe shaft second section and the pipe shaft third section that connect gradually.

The utility model discloses a further improvement lies in, telescopic shaft can adjust whole measuring device length through fixed and slider's recess and protruding.

The utility model is further improved in that the tube body can be extended until being completely unfolded or retracted until being completely retracted when in use.

The utility model discloses further improvement lies in, and the other end of telescopic pipe shaft is provided with the counter weight device.

The utility model discloses further improvement lies in, and the aperture has been seted up at the center of counter weight device, and the silicone tube of conducted pressure can pass the aperture and be connected with the manometer.

The utility model discloses further improvement lies in, and the manometer adopts micromanometer or U type pipe pressure gauge.

The utility model discloses at least, following profitable technological effect has:

1. because the air volume measurement cross-section sizes of the test sites are different and have larger difference, the lengths of the required measurement devices are different. If the proper measuring device is manufactured on site according to the required length, time and labor are wasted, and the input cost is increased. The utility model discloses a nested pipe shaft of retractable can freely adjust length and be applicable to the measuring face in not unidimensional cross-section.

2. The test site is relatively complicated, if the air quantity test of the draught fan inlet flue of the power station relates to high-altitude operation, the test site needs to be carried out on a scaffold, the space of the test site is limited, and the whole measuring device is difficult to carry and operate if the length of the whole measuring device is too long. The utility model discloses a nested pipe shaft of retractable can contract to shortest portable before the test, adjusts the device to suitable length again during the use, also can freely adjust at any time in the test.

3. During testing, most pipe bodies need to stretch into the pipeline, only a small part of pipe bodies are left to be manually supported outside the pipeline, the device is equivalent to a labor-consuming lever, testing personnel are easy to fatigue after long-time testing, and if the measuring device is not stably supported, the measuring device can fall into the pipeline, and equipment safety accidents are easily caused. The utility model discloses a can install the counter weight device additional at third section pipe shaft head to the mode that the weight that adopts each section pipe shaft increases progressively in proper order, with the common balanced measuring device's of counter weight device focus, make whole measuring device's focus keep near the measurement station. The fatigue of the tester is relieved, and the safety is also improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of a fixing and sliding device at the joint of the pipe body.

FIG. 3 is a schematic view of the partially collapsed state with weights added.

Description of reference numerals:

1 is a measuring device head; 2 is a first section of the tube body; 3 is a second section of the tube body; 4 is a third section of the tube body; 5 is a groove; 6 is a protrusion; 7 is a weight means, 8 is an orifice.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 3, the utility model provides a telescopic air volume measuring device, which comprises a measuring device head 1, a first pipe body section 2, a second pipe body section 3, a third pipe body section 4, a fixing and sliding device comprising a groove 5, a protrusion 6 and a counterweight device 7 with a small hole 8;

the measuring device head 1 adopts a standard pitot tube or a backrest tube head part, the telescopic tube body is a three-layer nested metal tube, all the tube bodies are nested in sequence, the three-layer telescopic tube body 2 is fixed and slides by adopting grooves and bulges, and the gravity center of the measuring device is balanced by adopting a counterweight device.

The first section 2 of the pipe body, the second section 3 of the pipe body and the third section 4 of the pipe body of the measuring device adopt three layers of telescopically nested pipes to replace the original whole pipe body.

All the pipe bodies are nested in sequence, and the length of the measuring device is adjusted by adopting the fixing and sliding of the grooves and the bulges on the pipe bodies.

A counterweight device 6 can be additionally arranged at the head of the third section of the pipe body so that the gravity center of the whole measuring device is kept near a measuring point.

The weight of each section of pipe body increases progressively in proper order, balances measuring device's focus with counter weight device jointly. The weight of the first section 2 of the tube body is less than that of the second section 3 of the tube body and less than that of the third section 4 of the tube body.

As shown in figure 3, when the measuring device works, the measuring device can freely stretch out and draw back within a certain range, and the head 1, the first pipe body section 2 and the second pipe body section 3 can partially or completely shrink into the third pipe body section 4. The counterweight device 7 with proper weight can be selected or not installed, and the silicone tube for transmitting pressure can pass through the small hole 8 to be connected with the pressure gauge. The length of the whole device can be pre-adjusted by the fixing and sliding device (comprising the groove 5 and the protrusion 6) before use, and can also be freely adjusted at any time during testing. The pressure gauge adopts a micro-manometer or a U-shaped manometer and is used for reading.

Although the invention has been described in detail with respect to specific embodiments and general description, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (3)

1. A telescopic air volume measuring device is characterized by comprising a measuring device head (1) and a telescopic pipe body, wherein the measuring device head (1) is arranged at the extending end of the telescopic pipe body;

the telescopic pipe body is a three-layer nested metal pipe, and all the pipe bodies are nested in sequence;

the telescopic pipe body comprises a first pipe body section (2), a second pipe body section (3) and a third pipe body section (4) which are sequentially connected, and two adjacent pipe bodies are fixed and slide through a groove (5) and a protrusion (6) which are arranged on the pipe bodies;

the other end of the telescopic pipe body is provided with a counterweight device (7), the center of the counterweight device (7) is provided with a small hole (8), and a silicone tube for conducting pressure can penetrate through the small hole (8) to be connected with a pressure gauge;

the telescopic pipe body can adjust the length of the whole measuring device through a groove (5) and a protrusion (6) of the fixing and sliding device.

2. A retractable air volume measuring device as claimed in claim 1, wherein in use the body is extendable until fully extended, or retractable until fully retracted.

3. The retractable air volume measuring device as claimed in claim 1, wherein the pressure gauge is a micro-pressure gauge or a U-tube pressure gauge.

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