阅读说明：本技术 一种非满管液体流量测量装置 (Non-full pipe liquid flow measuring device ) 是由 曾伟 薛彪 王文吉 邓林森 易旭涛 于 2020-07-24 设计创作，主要内容包括：本发明公开了一种非满管液体流量测量装置,包括第一法兰、装置箱体、液位计、节流板和第二法兰；所述节流板位于装置箱体的内部,节流板所在的平面与液体在管道内的流动方向垂直,节流板的下方边缘和两侧边缘与装置箱体密封连接,节流板的上方边缘与装置箱体具有间隙；所述节流板上方设置有凹槽；所述液位计位于所述进液腔内。利用流过特定形状截面时,进液腔液位与管道内流量之前存在一定的确定关系,所述确定关系可以参照现有流体力学中的堰流来进行流量计算方式；结合进液腔液位测量间接得到管道内流量,解决目前市面上的非满管流量计在流速慢、流量小的情况下无法准确测量的问题。(The invention discloses a non-full pipe liquid flow measuring device, which comprises a first flange, a device box body, a liquid level meter, a throttle plate and a second flange, wherein the first flange is arranged on the device box body; the throttle plate is positioned in the device box body, the plane of the throttle plate is vertical to the flowing direction of liquid in the pipeline, the lower edge and the two side edges of the throttle plate are hermetically connected with the device box body, and a gap is formed between the upper edge of the throttle plate and the device box body; a groove is arranged above the throttle plate; the liquid level meter is positioned in the liquid inlet cavity. When the liquid flows through the section with a specific shape, a certain determination relation exists between the liquid level of the liquid inlet cavity and the flow in the pipeline, and the determination relation can refer to weir flow in the existing fluid mechanics to calculate the flow; the liquid level measurement of the liquid inlet cavity is combined to indirectly obtain the flow in the pipeline, and the problem that the existing non-full pipe flowmeter on the market cannot accurately measure under the conditions of low flow speed and small flow is solved.)

1. A non-full pipe liquid flow measuring device is characterized in that the device comprises a device box body (2), a liquid level meter (3) and a throttle plate (4); a liquid inlet pipe (7) and a liquid outlet pipe (8) are respectively arranged on two sides of the device box body (2), and the interior of the box body (2) is communicated with the liquid inlet pipe (7) and the liquid outlet pipe (8); the end part of the liquid inlet pipe (7) is connected with a first flange (1), and the end part of the liquid outlet pipe (8) is connected with a second flange (5); the throttle plate (4) is positioned inside the device box body (2), the plane of the throttle plate (4) is vertical to the flowing direction of liquid in the pipeline, the lower edge and the two side edges of the throttle plate (4) are hermetically connected with the device box body (2), and a gap is formed between the upper edge of the throttle plate (4) and the device box body (2); a groove (401) is arranged above the throttle plate (4); the throttle plate (4) divides the interior of the device box body (2) into a liquid inlet cavity (201) and a liquid outlet cavity (202), the liquid inlet cavity (201) is communicated with the liquid inlet pipe (7), and the liquid outlet cavity (202) is communicated with the liquid outlet pipe (8); the liquid level meter (3) is positioned in the liquid inlet cavity (201).

2. A non-full line liquid flow measurement device according to claim 1, wherein: the liquid level meter (3) adopts a capacitance type liquid level meter.

3. A non-full line liquid flow measurement device according to claim 1, wherein: the cross-sectional area of the device box body (2) is larger than the cross-sectional area of the measured pipeline.

4. A non-full line liquid flow measurement device according to claim 1, wherein: the device box body (2) is a cuboid.

5. A non-full line liquid flow measurement device according to claim 1, wherein: the groove (401) above the throttle plate (4) is a V-shaped groove, a trapezoid groove or a rectangular groove, and the cross section area of the overflow of the groove (401) is smaller than that of the measured pipeline.

6. A non-full line liquid flow measurement device according to claim 1, wherein: and a breather valve (6) is arranged at the top of the liquid outlet cavity (202).

7. A non-full line liquid flow measurement device according to claim 1, wherein: the bottommost part of the groove (401) is higher than the bottommost part of the measured pipeline, and the top opening of the groove (401) is higher than the top of the measured pipeline.

8. A non-full line liquid flow measurement device according to claim 1, wherein: the central line of the first flange (1) and the central line of the second flange (5) are positioned on the same straight line.

9. A non-full line liquid flow measurement device according to claim 1, wherein: the device is positioned on the horizontal section of the measured pipeline, and the central line of the first flange (1) and the central line of the second flange (5) are positioned on the same straight line with the central line of the measured pipeline.

10. A non-full line liquid flow measurement device according to claim 1, wherein: the inner diameter of the first flange (1), the inner diameter of the second flange (5) and the inner diameter of the measured pipeline are the same.

Technical Field

The invention belongs to the technical field of liquid flow measurement, and particularly relates to a non-full pipe liquid flow measurement device.

Background

The liquid flow in the pipeline is an important parameter in industrial process measurement, and the current mainstream flow measurement methods include a Bernoulli equation principle measurement method, a velocity type flow measurement method, a volumetric measurement method, a mass flow measurement method and the like, and the measurement methods can only carry out measurement under the condition that the pipeline is completely filled with a liquid medium, and cannot carry out flow measurement on the pipeline which is not completely filled with the liquid medium. At present, ultrasonic non-full pipe flow meters on the market cannot accurately measure under the conditions of low flow speed and small flow.

Disclosure of Invention

The invention provides a non-full pipe liquid flow measuring device, which solves the problem that the non-full pipe flow meter on the market at present cannot accurately measure under the conditions of low flow speed and small flow.

The technical scheme adopted by the invention is as follows:

the invention provides a non-full pipe liquid flow measuring device, which comprises a device box body, a liquid level meter and a throttle plate, wherein the device box body is provided with a liquid level meter; a liquid inlet pipe and a liquid outlet pipe are respectively arranged on two sides of the box body of the device, and the interior of the box body 2 is communicated with the liquid inlet pipe and the liquid outlet pipe; the end part of the liquid inlet pipe is connected with a first flange, and the end part of the liquid outlet pipe is connected with a second flange; the throttle plate is positioned in the device box body, the plane of the throttle plate is vertical to the flowing direction of liquid in the pipeline, the lower edge and the two side edges of the throttle plate are hermetically connected with the device box body, and a gap is formed between the upper edge of the throttle plate and the device box body; a groove is arranged above the throttle plate; the throttle plate divides the interior of the device box body into a liquid inlet cavity and a liquid outlet cavity, the liquid inlet cavity is communicated with the liquid inlet pipe, and the liquid outlet cavity is communicated with the liquid outlet pipe; the liquid level meter is positioned in the liquid inlet cavity.

According to the technology, the device is of a box structure, the liquid inlet and the liquid outlet are arranged to be flanges, the flanges can be arranged according to the type of a pipeline, and the device is suitable for circular pipes, rectangular pipes and special-shaped pipe structures; the middle of the device box body is provided with a throttle plate, the box body is divided into a liquid inlet cavity and a liquid outlet cavity through the throttle plate, the middle of the throttle plate is provided with a groove, under the condition that the size of the groove is fixed, when liquid in a pipeline flows through a section with a specific shape under the state that the liquid is not full of the pipeline, the liquid level of the liquid inlet cavity has a certain definite relation with the flow in the pipeline, and the definite relation can refer to the weir flow in the existing hydrodynamics to carry out a flow calculation mode; the liquid level measurement of the liquid inlet cavity is combined to indirectly obtain the flow in the pipeline, and the problem that the existing non-full pipe flowmeter on the market cannot accurately measure under the conditions of low flow speed and small flow is solved.

In one possible design, the gauge employs a capacitive gauge.

In one possible design, the cross-sectional flow area of the device housing is greater than the cross-sectional area of the pipe being tested.

In one possible design, the device housing is a cuboid.

In one possible design, the groove above the throttle plate is a V-shaped groove or a rectangular groove, and the cross-sectional area of the groove is smaller than that of the measured pipeline.

In one possible design, a breather valve is arranged at the top of the liquid outlet cavity. Set up the breather valve through device box top, the guarantee box is inside to communicate with each other with the atmosphere, when full pipe appears in the pipeline simultaneously, prevents that liquid medium from spilling over.

In one possible design, the bottommost portion of the groove is higher than the bottommost portion of the measured pipe, and the top opening of the groove is higher than the top of the measured pipe.

In one possible design, the center line of the first flange and the center line of the second flange are located on the same straight line.

In one possible design, the device is located in a horizontal section of the pipe under test, and the center line of the first flange and the center line of the second flange are located on the same line as the center line of the pipe under test.

In one possible design, the inner diameter of the water end flange, the inner diameter of the second flange and the inner diameter of the measured pipe are the same.

The invention has the following advantages and beneficial effects:

1. the device is of a box body structure, the liquid inlet and the liquid outlet are arranged into flanges, the flanges can be arranged according to the type of a pipeline, and the device is suitable for circular pipes, rectangular pipes and special-shaped pipe structures; the middle of the device box body is provided with a throttle plate, the box body is divided into a liquid inlet cavity and a liquid outlet cavity through the throttle plate, the middle of the throttle plate is provided with a groove, under the condition that the size of the groove is fixed, when liquid in a pipeline flows through a section with a specific shape under the state that the liquid is not full of the pipeline, the liquid level of the liquid inlet cavity has a certain definite relation with the flow in the pipeline, and the definite relation can refer to the weir flow in the existing hydrodynamics to carry out a flow calculation mode; the liquid level measurement of the liquid inlet cavity is combined to indirectly obtain the flow in the pipeline, so that the problem that the existing non-full pipe flow meter on the market cannot accurately measure under the conditions of low flow speed and small flow is solved;

2. according to the invention, the breather valve is arranged at the top of the box body of the device, so that the inside of the box body is ensured to be communicated with the atmosphere, and meanwhile, when the pipeline is full, the liquid medium is prevented from overflowing.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a view of the configuration of the throttle plate with V-shaped grooves according to an embodiment of the present invention.

The reference numbers in the figures are:

1-a first flange, 2-a device box body, 3-a liquid level meter, 4-a throttle plate, 5-a second flange, 6-a breather valve, 7-a liquid inlet pipe, 8-a liquid outlet pipe, 201-a liquid inlet cavity, 202-a liquid outlet cavity and 401-a groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.

It should be understood that the terms first, second, etc. are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance. Although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.

It will be understood that when an element is referred to as being "connected," "connected," or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly adjacent" or "directly coupled" to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …", "adjacent" versus "directly adjacent", etc.).

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.

It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.