An adjustable position speed measuring device under dust conditions

Abstract

The present invention discloses an adjustable position speed measuring device under dust conditions, comprising: an airway transmission main body, which is provided with a plurality of dynamic pressure airflow channels and static pressure airflow channels; an input airway interface, which is arranged on both sides of the airway transmission main body; the input airway interface is divided into a dynamic pressure input interface of a frontal flow part and a static pressure input interface of a back flow part; the dynamic pressure input interface is connected with the dynamic pressure airflow channel in a one-to-one correspondence; the static pressure input interface is connected with the static pressure airflow channel in a one-to-one correspondence; a scale guide rail, two scale guide rails are arranged on both sides of the airway transmission main body; at least two measuring sliding probe holes are respectively slidably arranged on the two scale guide rails along the height direction of the airway transmission main body, and the two measuring sliding probe holes are respectively connected with the dynamic pressure input interface and the static pressure input interface on both sides of the airway transmission main body through a telescopic hose; a plurality of output airway interfaces are arranged on the top of the airway transmission main body, and the output airway interfaces are respectively connected with the dynamic pressure airflow channel and the static pressure airflow channel.

Description

Technical Field

[0001] The invention relates to the technical field of speed measuring devices, and more particularly to a position-adjustable speed measuring device under dust conditions. Background Art

[0002] In a gas-solid two-phase flow environment, the measurement of fluid velocity is the most important part of the flow state characterization. At present, there are many instruments and methods for measuring gas flow velocity, such as pitot tube velocity measurement, hot wire velocity measurement, and optical measurement (PIV). However, these methods have great limitations when measuring velocity under extreme conditions such as flue gas, wind and sand, etc. The commonly used pitot tube will be easily blocked under the long-term scouring of solid particles, making it difficult to measure accurately; hot wire velocity measurement is OK for pure flow, but when encountering particles such as sand and dust, the resistance hot wire at the top of the measurement is easily damaged by the particles, and the measurement cannot be achieved. The particle imaging tracer method (PIV) requires illumination of the measurement field and the experiment is difficult. The commonly used velocity measurement devices in two-phase flow can only achieve single-point measurement, and cannot achieve multi-point simultaneous measurement, which is not very flexible and convenient in practical applications.

[0003] At present, the most practical and commonly used speed measuring device is the pitot tube, which uses the Bernoulli principle and is equipped with a differential pressure transmitter for measurement. The speed of the fluid is calculated by the pressure difference between static pressure and dynamic pressure. For pure fluids, an L-shaped pitot tube is generally used, and for smoke environments, an S-shaped pitot tube is generally used.

[0004] Most speed measuring devices used in gas-solid two-phase flow can only measure the wind speed at one position, and are easily blocked in dusty environments, and cannot be used normally. They have poor flexibility and high cost. They require long-term measurement and repeated measurement at multiple points to obtain the speed. They also have poor durability and a high breakage rate. Summary of the invention

[0005] To this end, the present invention provides an adjustable position speed measuring device under dust conditions, in order to solve the technical problems in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A position-adjustable speed measuring device under dust conditions, comprising:

[0008] An airway transmission body, wherein a plurality of dynamic pressure airflow channels and static pressure airflow channels are provided in the airway transmission body;

[0009] Input airway interface, the input airway interface is arranged on both sides of the airway transmission body; the input airway interface is divided into a dynamic pressure input interface of the upstream part and a static pressure input interface of the backflow part; the dynamic pressure input interface is connected with the dynamic pressure airflow channel in a one-to-one correspondence; the static pressure input interface is connected with the static pressure airflow channel in a one-to-one correspondence;

[0010] A graduated guide rail, two of which are arranged on both sides of the airway transmission body;

[0011] Measuring sliding probe holes, at least two of the measuring sliding probe holes are slidably set on the two scale guide rails along the height direction of the airway transmission body, and the two measuring sliding probe holes are respectively connected to the dynamic pressure input interface and the static pressure input interface on both sides of the airway transmission body through telescopic hoses.

[0012] Output airway interfaces, several of which are arranged on the top of the airway transmission body, and the output airway interfaces are respectively connected to the dynamic pressure airflow channel and the static pressure airflow channel.

[0013] In some embodiments, a through channel is provided inside the slip measurement probe hole, and the channel is bent.

[0014] In some embodiments, the graduated guide rail is disposed on the airway transmission body via a support frame.

[0015] In some embodiments, clamping strips are provided on both sides of the measuring sliding probe hole, and the clamping strips are slidably clamped in the clamping slots matched with the scale guide rail.

[0016] In some embodiments, there are 12 measuring sliding probe holes, which are divided into 6 groups and arranged on the scale rails on both sides of the airway transmission body.

[0017] In summary, the present invention has the following beneficial effects:

[0018] The present invention has a novel structure and strong practicality. The purpose of the present invention is to provide a device for measuring the incoming flow velocity in a sandy or dusty environment. By measuring the fit between the sliding probe hole and the scale guide rail, the position at the desired height can be slidably adjusted; in addition, the internal airway can avoid the accumulation of excessive particles, thereby achieving the purpose of measuring the flow velocity in a sandy and dusty environment. The device of the present invention makes up for the shortcomings of the general Pitot tube device, which is easy to clog and cannot flexibly measure the flow velocity at multiple points in a sandy and dusty environment. It proposes a speed measuring device that is highly flexible, strong and reliable and can measure multiple points simultaneously in a sandy and dusty environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the present invention (the telescopic hose is not connected on the left side to facilitate the display of its structure)

[0020] Figure 2 A schematic diagram of the cooperation between the measuring sliding probe hole and the scale guide rail of the present invention;

[0021] Figure 3 is a schematic diagram of the scale guide;

[0022] Figure 4 is a cross-sectional view of the internal channel of the scale guide rail;

[0023] Figure 5 It is a working schematic diagram of the airway transmission subject;

[0024] Figure 6 Schematic diagram of a static pressure airflow channel and a dynamic pressure airflow channel;

[0025] Illustration: 1- output airway interface, 2- measurement sliding probe hole, 3- input airway interface, 4- telescopic hose, 5- scale guide rail, 6- airway transmission body, 7- support frame, 8- static pressure airflow channel, 9- dynamic pressure airflow channel. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0027] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0031] The following will be combined Figure 1-6 , a device for measuring speed under dusty conditions with adjustable position involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0032] Embodiment 1:

[0033] like Figure 1-6 As shown, a position-adjustable speed measuring device under dust conditions comprises: an airway transmission body 6, an input airway interface 3, a scale guide rail 5, a measuring sliding probe hole 2, an output airway interface 1, and a plurality of dynamic pressure airflow channels 9 and static pressure airflow channels 8 are arranged in the airway transmission body 6; the input airway interface 3 is arranged on both sides of the airway transmission body 6; the input airway interface 3 is divided into a dynamic pressure input interface of the upstream part and a static pressure input interface of the backflow part; the dynamic pressure input interface is connected to the dynamic pressure airflow channel 9 in a one-to-one correspondence; the static pressure input interface is connected to the static pressure airflow channel 8 in a one-to-one correspondence; two scale guide rails 5 are arranged on both sides of the airway transmission body 6; the scale guide rails 5 are arranged on the airway transmission body 6 through a support frame 7.

[0034] At least two measuring sliding probe holes 2 are respectively slidably arranged on two scale rails 5 along the height direction of the airway transmission body 6, and the two measuring sliding probe holes 2 are respectively connected to the dynamic pressure input interface and the static pressure input interface on both sides of the airway transmission body 6 through the telescopic hose 4. A plurality of output airway interfaces 1 are arranged on the top of the airway transmission body 6, and the output airway interfaces 1 are respectively connected to the dynamic pressure airflow channel 9 and the static pressure airflow channel 8.

[0035] The speed measuring device can be adjusted under dust conditions. Place it in the measuring environment, modulate the measuring sliding probe hole 2 to face the flow direction of the incoming flow, modulate the measuring sliding probe hole 2 to the position to be measured, and the positions of the measuring sliding probe hole 2 of the dynamic pressure input interface and the measuring sliding probe hole 2 of the static pressure input interface should be kept consistent. Output the serial number corresponding to the sliding probe hole group through the output air duct interface 1 to obtain the pressure information of the static pressure and dynamic pressure at the corresponding height.

[0036] In some embodiments, the interior of the measuring sliding probe hole 2 is provided with a through channel, which is bent, that is, the entrance is arranged downward, and in a sandy and dusty environment, the internal channel of the measuring sliding probe hole 2 avoids the accumulation of particles, thereby achieving the purpose of being used in a sandy and dusty environment.

[0037] In some embodiments, a clamping strip is provided on both sides of the measuring sliding probe hole 2, and the clamping strip is slidably clamped in a clamping slot provided in conjunction with the scale guide rail 5. The clamping strip can be made of elastic rubber material, so that the clamping strip and the clamping slot are connected with an elastic tight fit, which is convenient for movement and fixation.

[0038] In some embodiments, there are 12 measuring sliding probe holes 2, which are divided into 6 groups and arranged on the scale rails 5 on both sides of the airway transmission body 6, so as to facilitate flexible measurement of multiple points at the same time.

[0039] The above are all preferred embodiments of the present invention, and they do not limit the protection scope of the present invention in turn. For ordinary technicians in this field, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A speed measuring device with adjustable position under dust conditions, characterized in that: include: An airway transmission body, wherein a plurality of dynamic pressure airflow channels and static pressure airflow channels are provided in the airway transmission body; Input airway interface, the input airway interface is arranged on both sides of the airway transmission body; the input airway interface is divided into a dynamic pressure input interface of the upstream part and a static pressure input interface of the backflow part; the dynamic pressure input interface is connected with the dynamic pressure airflow channel in a one-to-one correspondence; the static pressure input interface is connected with the static pressure airflow channel in a one-to-one correspondence; A graduated guide rail, two of which are arranged on both sides of the airway transmission body; Measuring sliding probe holes, at least two of which are slidably arranged on the two scale rails along the height direction of the airway transmission body, and the two measuring sliding probe holes are respectively connected to the dynamic pressure input interface and the static pressure input interface on both sides of the airway transmission body through a telescopic hose; the measuring sliding probe hole is modulated to the position to be measured, and the position of the measuring sliding probe hole of the dynamic pressure input interface and the measuring sliding probe hole of the static pressure input interface should be kept consistent; Output airway interfaces, several of which are arranged on the top of the airway transmission body, and the output airway interfaces are respectively connected to the dynamic pressure airflow channel and the static pressure airflow channel.

2. The adjustable position speed measuring device under dust conditions according to claim 1, characterized in that: A through channel is arranged inside the measuring slip probe hole, and the channel is in a bent shape.

3. The adjustable position speed measuring device under dust conditions according to claim 1, characterized in that: The scale guide rail is arranged on the airway transmission body through a support frame.

4. The adjustable position speed measuring device under dust conditions according to claim 1, characterized in that: The two sides of the measuring sliding probe hole are provided with clamping strips, which are slidably clamped in the clamping grooves matched with the scale guide rail.

5. The adjustable position speed measuring device under dust conditions according to claim 1, characterized in that: The measuring sliding probe holes are provided with 12 in number, which are divided into 6 groups and arranged on the scale rails on both sides of the airway transmission body.

Images