Natural gas flow metering device

Abstract

The utility model discloses a natural gas flow metering device which comprises a filtering assembly, and the filtering assembly comprises a conveying pipe, a first valve, a turning pipe, a second valve, a third valve, a filter element, two limiting sliding grooves and a rotating disc. The two ends of the conveying pipe and the two ends of the air inlet pipe are symmetrically and fixedly connected to the outer side wall of the filter box and communicate with the filter box. The third valve is firstly opened, then the first valve and the second valve are sequentially closed, the flowing path of natural gas is the gas inlet pipe, the turning pipe, the conveying pipe and the metering pipe, the sealing plate is rotated through the handle to be separated from the filtering box, then the handle is pulled downwards, and the mounting frame can be pulled out. The filter element, the liquid catching grating layer and the magnetic net layer can be cleaned at the moment, the turning pipe and a plurality of valves are additionally arranged, so that the filter mechanism can be cleaned under the condition that normal conveying of natural gas is not affected, and normal gas use of a user is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas, and particularly relates to a natural gas flow metering device. Background Art

[0002] Natural gas is stored in underground porous rock formations, including oilfield gas, gas field gas, coalbed methane, mud volcano gas and biogenic gas, and a small amount is also found in coal seams. It is a high-quality fuel and chemical raw material. As a high-quality energy source and chemical raw material, the measurement of natural gas is increasingly valued by people. Developed countries with a high level of industrialization, such as Europe and the United States, started research on natural gas measurement technology early, invested a lot of funds and scientific and technological strength, and paid special attention to the measurement of traded natural gas.

[0003] A natural gas flow meter is an instrument used specifically to measure natural gas. When the current natural gas flow meter is in use, it is contaminated by impurities such as heavy oil and metal chips mixed in the natural gas, which makes the flow meter difficult to measure. In the prior art, a filtering mechanism is often added to filter the natural gas to ensure the accuracy of the flow meter's measurement results.

[0004] In the technical solution disclosed in Chinese patent CN202222854535.8, a natural gas flow metering device achieves the filtration of natural gas by setting filtering structures such as a magnetic mesh layer, a liquid catching grid and a filter mesh layer in the chamber, and facilitates the cleaning of the magnetic mesh layer, the liquid catching grid and the filter mesh layer. However, this filtering structure still has the following technical problems: when the magnetic mesh layer, the liquid catching grid and the filter mesh layer are taken out for cleaning, the sealing of the entire pipeline will be destroyed after removal, and the gas pipeline needs to be disconnected before cleaning, which will affect the transportation of natural gas and the normal use of gas by users. For this reason, a natural gas flow metering device is proposed. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a natural gas flow metering device.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A natural gas flow metering device includes a filter assembly, wherein the filter assembly includes a delivery pipe, a first valve, a change-direction pipe, a second valve, a third valve, an air inlet pipe, a sealing plate, a filter box, a mounting frame, a magnetic mesh layer, a liquid-catching grid layer, a filter element, two limit slides and a turntable;

[0008] The adjacent ends of the delivery pipe and the intake pipe are symmetrically fixedly connected to the outer wall of the filter box and are connected to the filter box. The first valve and the second valve are respectively installed on the outer walls of the delivery pipe and the intake pipe. The third valve is installed on the outer wall of the change-over pipe. The magnetic mesh layer, the liquid-catching grid layer and the filter element are all installed on the inner wall of the installation frame. The lower surface of the installation frame is fixedly connected to the upper surface of the turntable. The turntable is rotatably connected to the upper surface of the sealing plate. The two limiting slide grooves are symmetrically opened on the inner wall of the filter box.

[0009] Preferably, the outer side wall of the installation frame is slidably connected to the inner side walls of the two limiting sliding grooves, and the outer side wall of the sealing plate is threadedly connected to the inner side wall of the filter box.

[0010] Preferably, one end of the direction-changing pipe is fixedly connected to the outer side wall of the delivery pipe and communicated with the delivery pipe, and the other end of the direction-changing pipe is fixedly connected to the outer side wall of the intake pipe and communicated with the intake pipe.

[0011] Preferably, the first valve and the second valve are symmetrically located on both sides of the filter box, and the third valve is located on a side of the outer wall of the change-over pipe close to the air intake pipe.

[0012] Preferably, the second valve is located between the third valve and the filter box, and a handle is installed on the lower surface of the sealing plate.

[0013] Preferably, a main body component is installed at one end of the delivery pipe away from the filter box, and the main body component includes a flow meter and a metering tube;

[0014] The flow meter is installed on the outer side wall of the measuring tube.

[0015] Preferably, one end of the metering pipe is fixedly connected and communicated with one end of the delivery pipe away from the filter box through a connecting flange.

[0016] Preferably, one end of the metering pipe away from the delivery pipe is fixedly connected to a connecting pipe via a flange, and the connecting pipe is in communication with the delivery pipe.

[0017] The beneficial effects of the utility model are as follows: the utility model opens the third valve first, and then closes the first valve and the second valve in sequence. The flow path of the natural gas is the air intake pipe, the change-direction pipe, the delivery pipe and the metering pipe. The sealing plate is rotated by the handle to separate the sealing plate from the filter box. Then the handle is pulled downward to pull out the installation frame. At this time, the filter element, the liquid-catching grid layer and the magnetic mesh layer can be cleaned. After cleaning, the installation frame is inserted into the limiting slide groove, the sealing plate is tightened, the second valve and the first valve are opened in sequence, and the third valve is closed. At this time, the natural gas flows into the filter box, and the filtering and delivery of the natural gas can be realized. By adding the change-direction pipe and multiple valves, the utility model can complete the cleaning of the filter mechanism without affecting the normal delivery of the natural gas, thereby ensuring the normal gas use of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the prior art or the specific implementation methods of the present utility model, the drawings used in the description of the prior art or the specific implementation methods are briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the overall structure of the natural gas flow metering device of the utility model.

[0020] Figure 2 It is a structural diagram of the filtering component.

[0021] Figure 3 It is a schematic diagram of the structure after the delivery pipe is connected to the filter box.

[0022] Figure 4 It is a structural schematic diagram of the sealing plate.

[0023] Figure 5 It is a structural diagram of the filter box.

[0024] Figure numerals: 101, filter assembly; 11, delivery pipe; 12, first valve; 13, change-direction pipe; 14, second valve; 15, third valve; 16, air inlet pipe; 17, handle; 18, sealing plate; 19, filter box; 20, mounting frame; 21, magnetic mesh layer; 22, liquid-collecting grid layer; 23, filter element; 24, limit slide; 25, turntable; 301, main assembly; 31, flow meter; 32, metering tube; 33, connecting pipe. DETAILED DESCRIPTION

[0025] In order to make those skilled in the art better understand the present solution, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the claims and description of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not limited to those steps or units clearly listed, but may also include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

[0028] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0029] This embodiment provides a natural gas flow metering device, such as Figure 1-5 As shown, it includes a filter assembly 101, and the filter assembly 101 includes a delivery pipe 11, a first valve 12, a change-direction pipe 13, a second valve 14, a third valve 15, an air intake pipe 16, a sealing plate 18, a filter box 19, a mounting frame 20, a magnetic mesh layer 21, a liquid-collecting grid layer 22, a filter element 23, two limiting slide grooves 24 and a turntable 25.

[0030] Among them, the adjacent ends of the delivery pipe 11 and the intake pipe 16 are symmetrically fixedly connected to the outer wall of the filter box 19 and communicate with the filter box 19, the first valve 12 and the second valve 14 are respectively installed on the outer walls of the delivery pipe 11 and the intake pipe 16, the third valve 15 is installed on the outer wall of the changing pipe 13, the magnetic mesh layer 21, the liquid catching grid layer 22 and the filter element 23 are all installed on the inner wall of the mounting frame 20, the lower surface of the mounting frame 20 is fixedly connected to the upper surface of the turntable 25, the turntable 25 is rotatably connected to the upper surface of the sealing plate 18, and two limiting slide grooves 24 are symmetrically opened on the inner wall of the filter box 19.

[0031] In one embodiment, the outer wall of the mounting frame 20 is slidably connected to the inner walls of the two limiting grooves 24, and the outer wall of the sealing plate 18 is threadedly connected to the inner wall of the filter box 19. The position of the mounting frame 20 can be limited by the limiting grooves 24, and the mounting frame 20 can be fixed in the filter box 19 by the sealing plate 18.

[0032] In one embodiment, one end of the change-over pipe 13 is fixedly connected to the outer wall of the delivery pipe 11 and communicated with the delivery pipe 11, and the other end of the change-over pipe 13 is fixedly connected to the outer wall of the intake pipe 16 and communicated with the intake pipe 16. The first valve 12 and the second valve 14 are symmetrically located on both sides of the filter box 19, and the third valve 15 is located on the side of the outer wall of the change-over pipe 13 close to the intake pipe 16. The second valve 14 is located between the third valve 15 and the filter box 19. A handle 17 is installed on the lower surface of the sealing plate 18. The third valve 12 is opened first. 15. Then close the first valve 12 and the second valve 14 in sequence. The flow path of the natural gas is the intake pipe 16, the change-direction pipe 13, the delivery pipe 11 and the metering pipe 32. At this time, the filter element 23, the liquid-catching grid layer 22 and the magnetic mesh layer 21 can be cleaned. By opening the second valve 14 and the first valve 12 in sequence and then closing the third valve 15, the flow path of the natural gas is the intake pipe 16, the filter box 19, the delivery pipe 11 and the metering pipe 32. At this time, the natural gas can be filtered while being transported.

[0033] In one embodiment, a main body assembly 301 is installed at one end of the delivery pipe 11 away from the filter box 19, and the main body assembly 301 includes a flow meter 31 and a metering tube 32;

[0034] The flow meter 31 is installed on the outer wall of the metering pipe 32. One end of the metering pipe 32 is fixedly connected and communicated with the end of the delivery pipe 11 away from the filter box 19 through a connecting flange. The end of the metering pipe 32 away from the delivery pipe 11 is fixedly connected to a connecting pipe 33 through a flange. The connecting pipe 33 is communicated with the delivery pipe 11. The flow rate of natural gas can be measured by the flow meter 31.

[0035] The working process of a natural gas flow metering device in this embodiment is as follows: the connecting pipe 33 and the air inlet pipe 16 are connected to the natural gas pipeline, and the natural gas flows into the air inlet pipe 16, the filter box 19, the delivery pipe 11, the metering pipe 32 and the connecting pipe 33 in sequence, and then flows into the natural gas pipeline. When the natural gas flows into the filter box 19, the impurities and moisture in the natural gas can be removed by the filter element 23, the liquid capture grid layer 22 and the magnetic mesh layer 21, and then the metal chips are adsorbed by the magnetic mesh layer 21, and the filtered and purified natural gas flows into the metering pipe 32. At this time, the flow meter 31 can measure the flow of the natural gas. Since the filtering mechanism is added, the impurities in the natural gas can be prevented from affecting the metering accuracy of the flow meter 31. When the filter element 23, the liquid capture grid layer 22 and the magnetic mesh layer 21 need to be cleaned, , first open the third valve 15, then close the first valve 12 and the second valve 14 in sequence, at this time, natural gas flows from the intake pipe 16 into the redirecting pipe 13, and then flows into the metering pipe 32 through the delivery pipe 11, and the sealing plate 18 is rotated by the handle 17 to separate the sealing plate 18 from the filter box 19, and then the handle 17 is pulled downward to pull out the installation frame 20, at this time, the filter element 23, the liquid catching grid layer 22 and the magnetic mesh layer 21 can be cleaned, and after cleaning, the filter element 23, the liquid catching grid layer 22 and the magnetic mesh layer 21 are installed in the installation frame 20, and the installation frame 20 is inserted into the limiting slide groove 24, and the sealing plate 18 is tightened, at this time, the second valve 14 and the first valve 12 are opened in sequence, and then the third valve 15 is closed, and the natural gas flows into the filter box 19, and at this time, the natural gas can be filtered while being transported.

[0036] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of this innovative technical solution.

Claims

1. A natural gas flow metering device, characterized in that: The filter assembly (101) comprises a conveying pipe (11), a first valve (12), a direction-changing pipe (13), a second valve (14), a third valve (15), an air inlet pipe (16), a sealing plate (18), a filter box (19), a mounting frame (20), a magnetic mesh layer (21), a liquid-collecting grid layer (22), a filter element (23), two limit slide grooves (24) and a rotating disk (25); The adjacent ends of the delivery pipe (11) and the air intake pipe (16) are symmetrically fixedly connected to the outer wall of the filter box (19) and communicate with the filter box (19); the first valve (12) and the second valve (14) are respectively installed on the outer walls of the delivery pipe (11) and the air intake pipe (16); the third valve (15) is installed on the outer wall of the change-over pipe (13); the magnetic mesh layer (21), the liquid-collecting grid layer (22) and the filter element (23) are all installed on the inner wall of the installation frame (20); the lower surface of the installation frame (20) is fixedly connected to the upper surface of the rotating disk (25); the rotating disk (25) is rotatably connected to the upper surface of the sealing plate (18); and the two limiting slide grooves (24) are symmetrically opened on the inner wall of the filter box (19).

2. The natural gas flow metering device according to claim 1, characterized in that: The outer wall of the installation frame (20) is slidably connected to the inner walls of the two limiting sliding grooves (24), and the outer wall of the sealing plate (18) is threadedly connected to the inner wall of the filter box (19).

3. The natural gas flow metering device according to claim 1, characterized in that: One end of the direction-changing tube (13) is fixedly connected to the outer wall of the delivery tube (11) and communicates with the delivery tube (11), and the other end of the direction-changing tube (13) is fixedly connected to the outer wall of the air intake tube (16) and communicates with the air intake tube (16).

4. The natural gas flow metering device according to claim 3, characterized in that: The first valve (12) and the second valve (14) are symmetrically located on both sides of the filter box (19), and the third valve (15) is located on a side of the outer wall of the change-over pipe (13) close to the air intake pipe (16).

5. The natural gas flow metering device according to claim 4, characterized in that: The second valve (14) is located between the third valve (15) and the filter box (19), and a handle (17) is installed on the lower surface of the sealing plate (18).

6. The natural gas flow metering device according to claim 3, characterized in that: A main body component (301) is installed at one end of the delivery pipe (11) away from the filter box (19), and the main body component (301) comprises a flow meter (31) and a metering tube (32); The flow meter (31) is installed on the outer wall of the measuring tube (32).

7. The natural gas flow metering device according to claim 6, characterized in that: One end of the metering pipe (32) is fixedly connected and communicated with an end of the delivery pipe (11) away from the filter box (19) via a connecting flange.

8. The natural gas flow metering device according to claim 7, characterized in that: One end of the metering pipe (32) away from the delivery pipe (11) is fixedly connected to a connecting pipe (33) via a flange, and the connecting pipe (33) is in communication with the delivery pipe (11).

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