CN219829982U - Orifice flowmeter - Google Patents

Abstract

The utility model belongs to the technical field of automatic meters, and particularly discloses an orifice plate flowmeter, which comprises a plurality of differential pressure transmitters and a throttling device, wherein the throttling device is provided with at least one first pressure taking port and at least one second pressure taking port, the first pressure taking port is communicated with at least one first pressure guiding pipe, each first pressure guiding pipe is communicated with a plurality of first branches, each first branch is connected with the high pressure side of one differential pressure transmitter, the second pressure taking port is communicated with at least one second pressure guiding pipe, each second pressure guiding pipe is communicated with a plurality of second branches, and each second branch is connected with the low pressure side of one differential pressure transmitter. Through set up first branch road on first pressure guiding pipe to and set up the second branch road on the second pressure guiding pipe, thereby can effectually reduce the trompil quantity on throttling arrangement, also can satisfy the installation needs of a plurality of differential pressure transmitters simultaneously, increased installation space, reduce the construction degree of difficulty.

Description

Orifice flowmeter

Technical Field

The utility model relates to the technical field of automatic meters, in particular to a pore plate flowmeter.

Background

At present, large petroleum and petrochemical devices at home and abroad are increasingly increased, a pore plate flowmeter is often adopted in a plurality of large devices to detect the flow of a medium in a pipeline, in order to ensure reliable flow monitoring and control of the medium in the pipeline, a plurality of flow signal safety interlocks and control are arranged on the pipeline at the same time, and the interlocking signals and the control signals cannot share the same signal, so that one set of throttling device is provided with four sets of differential pressure transmitters, three differential pressure transmitters are used for giving the interlocking signals, and the other differential pressure transmitter is used for giving the control signals.

As shown in fig. 1 and 2, 4 pairs of pressure taking ports (8) are generally formed on the front and rear pipelines of the throttling device 100', that is, 4 first pressure taking ports 101' are circumferentially formed on the upstream pipeline of the throttling device 100', 4 second pressure taking ports 102' are circumferentially formed on the downstream pipeline of the throttling device 100', and each pair of pressure taking ports (2), that is, the first pressure taking ports 101' and the second pressure taking ports 102', are correspondingly communicated with one differential pressure transmitter 200' through two pressure guiding pipes 300', and the differential pressure transmitter 200' calculates the flow in the pipeline according to the pressure difference between the front and rear of the throttling device 100', so as to respectively give an interlocking signal and a control signal. However, in this solution, it is not friendly for the small-caliber throttling device 100', and it is difficult to construct on the upstream and downstream pipelines due to space limitation, and the arrangement of the pressure taking port is also inconvenient, and space limitation is large.

Accordingly, there is a need for an orifice plate flowmeter that addresses the above-described issues.

Disclosure of Invention

The utility model aims to provide a pore plate flowmeter, which provides a novel installation structure between a differential pressure transmitter and a throttling device, and reduces the number of holes on the throttling device, so that the installation space is increased, and the construction difficulty is reduced.

To achieve the purpose, the utility model adopts the following technical scheme:

the present utility model provides an orifice plate flowmeter comprising:

a plurality of differential pressure transmitters;

the throttling device comprises a first flange, a second flange and a throttling orifice plate, wherein the throttling orifice plate is clamped between the first flange and the second flange, the first flange is connected with an upstream pipeline, the second flange is connected with a downstream pipeline, and a circulating medium sequentially passes through the first flange, the second flange and the downstream pipeline along the upstream pipeline;

the first flange is provided with at least one first pressure taking port, the first pressure taking port is communicated with at least one first pressure guiding pipe, each first pressure guiding pipe is communicated with a plurality of first branches, and each first branch is connected with the high-pressure side of one differential pressure transmitter;

the second flange is provided with at least one second pressure taking port, the second pressure taking ports are communicated with at least one second pressure guiding pipe, each second pressure guiding pipe is communicated with a plurality of second branches, and each second branch is connected with the low pressure side of the differential pressure transmitter.

Optionally, the differential pressure transmitter is provided with four differential pressure transmitters;

the first flange is provided with two first pressure taking ports which are communicated with two first pressure guiding pipes, each first pressure guiding pipe is communicated with two first branches, and each first branch is connected with the high-pressure side of one differential pressure transmitter;

the second flange is provided with two second pressure taking ports, the second pressure taking ports are communicated with two second pressure guiding pipes, each second pressure guiding pipe is communicated with two second branches, and each second branch is connected with the low pressure side of the differential pressure transmitter.

Optionally, the axes of the two first pressure taking openings are both arranged along the radial direction of the first flange, and an included angle alpha between the axes of the two first pressure taking openings is 90 degrees;

the axes of the two second pressure taking openings are arranged along the radial direction of the second flange, and an included angle alpha between the axes of the two second pressure taking openings is 90 degrees.

Optionally, the first pressure guiding pipe is communicated with the two first branches, and the second pressure guiding pipe is communicated with the two second branches through three-way valves.

Optionally, the orifice plate flowmeter comprises a first reducing joint, the first pressure taking port is communicated with a first connecting pipe, the pipe diameter of the first connecting pipe is larger than that of the first pressure guiding pipe, the large-mouth end of the first reducing joint is communicated with the first connecting pipe, and the small-mouth end of the first reducing joint is communicated with the first pressure guiding pipe;

the orifice plate flowmeter comprises a second reducing joint, the second pressure taking port is communicated with a second connecting pipe, the pipe diameter of the second connecting pipe is larger than that of the second pressure guiding pipe, the large-mouth end of the second reducing joint is communicated with the second connecting pipe, and the small-mouth end of the second reducing joint is communicated with the second pressure guiding pipe.

Optionally, a first valve is provided on the first connecting pipe and/or the second connecting pipe.

Optionally, a second root valve is arranged on the first branch and/or the second branch.

Optionally, the first branch is connected with the high-pressure side of the differential pressure transmitter, and the second branch is connected with the low-pressure side of the differential pressure transmitter through a threaded terminal connector.

Optionally, the first flange is fixedly connected with the second flange through bolts.

The beneficial effects of the utility model are as follows:

the utility model provides an orifice flowmeter, which comprises a plurality of differential pressure transmitters and a throttling device, wherein the throttling device comprises a first flange, a second flange and a throttling orifice plate, the throttling orifice plate is clamped between the first flange and the second flange, the first flange is connected with an upstream pipeline, and the second flange is connected with a downstream pipeline. The first flange is provided with at least one first pressure taking port, the first pressure taking port is communicated with at least one first pressure guiding pipe, each first pressure guiding pipe is communicated with a plurality of first branches, each first branch is connected with the high pressure side of one differential pressure transmitter, the second flange is provided with at least one second pressure taking port, the second pressure taking port is communicated with at least one second pressure guiding pipe, each second pressure guiding pipe is communicated with a plurality of second branches, and each second branch is connected with the low pressure side of one differential pressure transmitter.

Through set up first branch road on first pressure guiding pipe to and set up the second branch road on the second pressure guiding pipe, thereby can effectually reduce the trompil quantity on throttling arrangement, also can satisfy the installation needs of a plurality of differential pressure transmitters simultaneously, increased installation space, reduce the construction degree of difficulty.

Drawings

FIG. 1 is a schematic diagram of a conventional orifice plate flowmeter;

FIG. 2 is a front view of a throttle device according to a conventional art;

FIG. 3 is a schematic diagram of an orifice plate flowmeter according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a front view of a throttle device provided in an embodiment of the utility model.

In the figure:

100', a throttle device; 101', a first pressure taking port; 102', a second pressure taking port; 110. a first flange; 120. a second flange; 200', differential pressure transmitter; 300', a pressure guiding tube;

100. a throttle device; 101. an upstream line; 102. a downstream line; 110. a first flange; 111. a first pressure taking port; 120. a second flange; 121. a second pressure taking port; 130. an orifice plate;

200. a differential pressure transmitter; 210. a high pressure side; 220. a low pressure side;

310. a first pressure guiding pipe; 311. a first branch; 320. a second pressure guiding pipe; 321. a second branch; 330. a three-way valve; 340. a second root valve;

410. a first connection pipe; 420. a second connection pipe; 430. a first root valve;

510. a first reducing joint; 520. a second reducing joint;

600. a threaded terminal fitting.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 and 2, the orifice plate flowmeter in the prior art has four first pressure-taking ports 101' formed on the first flange 110 at the upstream of the orifice plate, and correspondingly, four second pressure-taking ports 102' formed on the second flange 120 at the downstream of the orifice plate, wherein each first pressure-taking port 101' and one second pressure-taking port 102' are a group, and each group of pressure-taking ports is correspondingly connected with one differential pressure transmitter 200'; thus, differential pressure transmitter 200' can calculate the flow rate of the medium in the pipeline through the detected pressure difference, and in order to ensure the accuracy and reliability of detection, three differential pressure transmitters 200' provide safety interlock signals, and the other differential pressure transmitter 200' separately provides control signals.

Because four first pressure taking openings 101 'are arranged on the first flange 110 at the upstream of the throttle plate, an included angle beta between the axes of the two first pressure taking openings 101' at the outermost side is 90 degrees, an included angle between the axes of the two adjacent first pressure taking openings 101 'is 22.5 degrees, correspondingly, four second pressure taking openings 102' are arranged on the second flange 120 at the downstream of the throttle plate, an included angle beta between the axes of the two second pressure taking openings 102 'at the outermost side is 90 degrees, an included angle between the axes of the two adjacent second pressure taking openings 102' is 22.5 degrees, and the four first pressure taking openings 101 'and the four second pressure taking openings 102' are in one-to-one correspondence and are positioned on the same straight line. This makes it difficult to operate the small-diameter throttle device 100' with a large space limitation.

To this end, the present embodiment provides an orifice plate flowmeter, referring to fig. 3-5, comprising a plurality of differential pressure transmitters 200 and a throttling device 100, wherein the throttling device 100 comprises a first flange 110, a second flange 120 and an orifice plate 130, the orifice plate 130 is sandwiched between the first flange 110 and the second flange 120, the first flange 110 is connected with an upstream pipeline 101, the second flange 120 is connected with a downstream pipeline 102, and a flowing medium sequentially passes through the first flange 110, the second flange 120 and the downstream pipeline 102 along the upstream pipeline 101. Illustratively, in some embodiments, the first flange 110 is fixedly coupled to the second flange 120 by bolts.

Further, at least one first pressure taking port 111 is provided on the first flange 110, the first pressure taking port 111 is communicated with at least one first pressure guiding tube 310, each first pressure guiding tube 310 is communicated with a plurality of first branches 311, each first branch 311 is connected with the high pressure side 210 of one differential pressure transmitter 200, at least one second pressure taking port 121 is provided on the second flange 120, the second pressure taking port 121 is communicated with at least one second pressure guiding tube 320, each second pressure guiding tube 320 is communicated with a plurality of second branches 321, and each second branch 321 is connected with the low pressure side 220 of one differential pressure transmitter 200. Through set up first branch road 311 on first leading pressure pipe 310 to and set up second branch road 321 on second leading pressure pipe 320, thereby can effectually reduce the trompil quantity on throttling arrangement 100, also can satisfy the installation needs of a plurality of differential pressure transmitters 200 simultaneously, increased installation space, reduce the construction degree of difficulty.

As an alternative, in this embodiment, four differential pressure transmitters 200 are taken as an example, at this time, two first pressure taking ports 111 are provided on the first flange 110, the first pressure taking ports 111 are communicated with two first pressure guiding pipes 310, each first pressure guiding pipe 310 is communicated with two first branches 311, each first branch 311 is connected with the high pressure side 210 of one differential pressure transmitter 200, so that each first pressure taking port 111 is connected with the high pressure side 210 of two differential pressure transmitters 200 respectively, and the two first pressure taking ports 111 are connected with the high pressure sides 210 of four differential pressure transmitters 200 in common. The second flange 120 is provided with two second pressure taking ports 121, the second pressure taking ports 121 are communicated with two second pressure guiding pipes 320, each second pressure guiding pipe 320 is communicated with two second branches 321, each second branch 321 is connected with the low pressure side 220 of one differential pressure transmitter 200, and accordingly each second pressure taking port 121 is respectively connected with the low pressure sides 220 of two differential pressure transmitters 200, and the two second pressure taking ports 121 are connected with the low pressure sides 220 of four differential pressure transmitters 200 in total. Alternatively, the connection between the first leg 311 and the high pressure side 210 of the differential pressure transmitter 200 and the second leg 321 and the low pressure side 220 of the differential pressure transmitter 200 may be through a threaded terminal connection 600.

Compared with the prior art, the number of the holes needed on the throttling device 100 is reduced from original 4 pairs (8) to 2 pairs (4), and the number of the holes on the throttling device 100 is reduced by arranging the branch drainage mode on the first pressure guiding pipe 310 and the second pressure guiding pipe 320, so that the reliability and the accuracy of detection are not affected.

With continued reference to fig. 5, the axes of the two first pressure taking ports 111 are all disposed along the radial direction of the first flange 110, and the included angle α between the axes of the two first pressure taking ports 111 is 90 °, and similarly, the axes of the two second pressure taking ports 121 are all disposed along the radial direction of the second flange 120, and the included angle α between the axes of the two second pressure taking ports 121 is 90 °, and the positions of the first pressure taking ports 111 and the second pressure taking ports 121 coincide when viewed from the side of the throttle device 100. Therefore, the distance between the two first pressure taking openings 111 is far, the distance between the two second pressure taking openings 121 is far, a large operation space is provided for construction, workers can conveniently develop work, and the construction difficulty is reduced.

With continued reference to fig. 1, the first pressure guiding pipe 310 is communicated with the two first branches 311, and the second pressure guiding pipe 320 is communicated with the two second branches 321 through the three-way valve 330, so that the pressure difference between the front and the rear of the throttling device 100 is conveniently guided to the plurality of differential pressure transmitters 200, a large number of differential pressure transmitters 200 are installed, the flow detection precision is ensured, and the flow detection device is simple in structure and low in cost.

In addition, since the differential pressure transmitter 200 does not require a particularly large flow rate, the pipe diameters of the first pressure introducing pipe 310 and the second pressure introducing pipe 320 are selected to be smaller, while in order to adaptively connect the first pressure introducing pipe 310 with the first pressure taking port 111 and adaptively connect the second pressure introducing pipe 320 with the second pressure taking port 121, the orifice plate flowmeter in this embodiment includes a first reducing joint 510 and a first connecting pipe 410, the first connecting pipe 410 communicates with the first pressure taking port 111, the first connecting pipe 410 communicates with the first pressure introducing pipe 310 through the first reducing joint 510, specifically, the pipe diameter of the first connecting pipe 410 is larger than that of the first pressure introducing pipe 310, so that the large-mouth end of the first reducing joint 510 communicates with the first connecting pipe 410, and the small-mouth end of the first reducing joint 510 communicates with the first pressure introducing pipe 310. Further, the orifice plate flowmeter includes a second reducing joint 520 and a second connecting pipe 420, the second pressure-taking port 121 is communicated with the second connecting pipe 420, the pipe diameter of the second connecting pipe 420 is larger than that of the second pressure guiding pipe 320, the large-mouth end of the second reducing joint 520 is communicated with the second connecting pipe 420, and the small-mouth end of the second reducing joint 520 is communicated with the second pressure guiding pipe 320.

Further, a first valve 430 is provided on each of the first connection pipe 410 and the second connection pipe 420. Of course, in other embodiments, the first root valve 430 may be provided on the first connection pipe 410 or the second connection pipe 420 as needed. By providing the first valve 430, servicing of the restriction device 100 is facilitated.

Optionally, a second valve 340 is disposed on each of the first branch 311 and the second branch 321. Of course, in other embodiments, the second root valve 340 may be disposed on the first branch 311 or the second branch 321 as desired. The differential pressure transmitter 200 can be overhauled conveniently through the arrangement of the second valve 340, and one differential pressure transmitter 200 can be overhauled independently, so that the working of other differential pressure transmitters 200 is not influenced.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (9)

1. An orifice plate flowmeter, comprising:

a plurality of differential pressure transmitters (200);

the throttling device (100), the throttling device (100) comprises a first flange (110), a second flange (120) and a throttling orifice plate (130), the throttling orifice plate (130) is clamped between the first flange (110) and the second flange (120), the first flange (110) is connected with an upstream pipeline (101), the second flange (120) is connected with a downstream pipeline (102), and a circulating medium sequentially passes through the first flange (110), the second flange (120) and the downstream pipeline (102) along the upstream pipeline (101);

the first flange (110) is provided with at least one first pressure taking port (111), the first pressure taking port (111) is communicated with at least one first pressure guiding pipe (310), each first pressure guiding pipe (310) is communicated with a plurality of first branches (311), and each first branch (311) is connected with a high-pressure side (210) of one differential pressure transmitter (200);

the second flange (120) is provided with at least one second pressure taking port (121), the second pressure taking port (121) is communicated with at least one second pressure guiding pipe (320), each second pressure guiding pipe (320) is communicated with a plurality of second branches (321), and each second branch (321) is connected with a low-pressure side (220) of the differential pressure transmitter (200).

2. The orifice plate flow meter of claim 1, wherein said differential pressure transmitter (200) is provided in four;

the first flange (110) is provided with two first pressure taking ports (111), the first pressure taking ports (111) are communicated with two first pressure guiding pipes (310), each first pressure guiding pipe (310) is communicated with two first branches (311), and each first branch (311) is connected with a high-pressure side (210) of one differential pressure transmitter (200);

the pressure measuring device is characterized in that two second pressure taking ports (121) are formed in the second flange (120), the second pressure taking ports (121) are communicated with two second pressure guiding pipes (320), each second pressure guiding pipe (320) is communicated with two second branches (321), and each second branch (321) is connected with a low-pressure side (220) of the differential pressure transmitter (200).

3. The orifice plate flowmeter of claim 2, wherein the axes of both of said first pressure taps (111) are disposed radially of said first flange (110), and wherein the included angle α between the axes of both of said first pressure taps (111) is 90 °;

the axes of the two second pressure taking openings (121) are arranged along the radial direction of the second flange (120), and an included angle alpha between the axes of the two second pressure taking openings (121) is 90 degrees.

4. The orifice plate flow meter of claim 2, wherein the first pressure conduit (310) is in communication with both of the first branches (311) and the second pressure conduit (320) is in communication with both of the second branches (321) via a three-way valve (330).

5. The orifice plate flow meter of claim 1, wherein the orifice plate flow meter includes a first reducing joint (510), the first pressure tap (111) communicates with a first connecting tube (410), the first connecting tube (410) has a tube diameter greater than the first pressure inducing tube (310), a large mouth end of the first reducing joint (510) communicates with the first connecting tube (410), and a small mouth end of the first reducing joint (510) communicates with the first pressure inducing tube (310);

the orifice plate flowmeter comprises a second reducing joint (520), the second pressure taking port (121) is communicated with a second connecting pipe (420), the pipe diameter of the second connecting pipe (420) is larger than that of the second pressure guiding pipe (320), the large-mouth end of the second reducing joint (520) is communicated with the second connecting pipe (420), and the small-mouth end of the second reducing joint (520) is communicated with the second pressure guiding pipe (320).

6. The orifice plate flowmeter of claim 5, wherein the first connection tube (410) and/or the second connection tube (420) are provided with a first valve (430).

7. The orifice plate flowmeter of claim 1, wherein a second root valve (340) is provided on the first branch (311) and/or the second branch (321).

8. The orifice plate flow meter of claim 1, wherein the first leg (311) is connected to a high pressure side (210) of the differential pressure transmitter (200) and the second leg (321) is connected to a low pressure side (220) of the differential pressure transmitter (200) by a threaded terminal connection (600).

9. The orifice plate flowmeter of claim 1, wherein said first flange (110) and said second flange (120) are fixedly connected by bolts.