Metering and separating device for natural gas component analysis and detection

Abstract

The utility model discloses a metering separation device for natural gas component analysis and detection, which comprises a separation box, one side of the separation box is communicated and fixed with a gas inlet pipe, the other side of the separation box is communicated and fixed with a gas outlet pipe, a partition plate is fixedly arranged in the separation box, and the bottom of the partition plate is fixedly connected with a first baffle plate; the side, away from the air inlet pipe, of the first shielding plate is fixedly connected with a second shielding plate, the air inlet pipe is located below the partition plate, the lowest end of the air inlet pipe is higher than the bottom of the first shielding plate, a first filter screen is arranged on the partition plate and located above the second shielding plate, and the air outlet pipe is located above the first filter screen. A filtering structure is movably arranged below the first shielding plate in the separation box in a sleeving manner; and a discharging opening is formed in the bottom of the separation box and below the filtering mechanism. By means of the two-time collision mode, separation of liquid and gas can be effectively achieved, the separation effect is improved, separated natural gas can be metered through the flow meter, and the separated natural gas and liquid can be conveniently filtered.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas, in particular to a metering and separation device for analyzing and detecting natural gas components. Background Art

[0002] The main use of natural gas is as fuel. It can be used to make carbon black, chemicals and liquefied petroleum gas. Propane and butane produced from natural gas are important raw materials for modern industry. Natural gas metering is actually the measurement of natural gas flow, which is indirectly measured during the flow of natural gas. When analyzing, detecting and metering natural gas, it is necessary to separate and process the liquid natural gas. Most of the existing liquid natural gas is separated by large tank separators, and the separation effect is not ideal. It is also inconvenient to filter and process the separated natural gas and liquid in time, which cannot meet the use requirements.

[0003] A Chinese patent with publication number CN215209284U discloses a natural gas metering and separation device, and its technical solution is mainly: a natural gas metering and separation device is disclosed, including a shock-absorbing and protective mechanism, a stabilizing mechanism and a sedimentation mechanism, the shock-absorbing and protective mechanism includes a separation box, a No. 2 connecting rod, a No. 3 connecting plate and a No. 1 connecting rod, the separation box is slidably connected to the No. 1 connecting plate, and the separation box is fixedly connected to the No. 2 connecting plate, the No. 2 connecting rod is fixedly connected to the No. 1 connecting plate, and the No. 2 connecting rod is slidably connected to the No. 2 connecting plate, the No. 3 connecting plate is fixedly connected to the No. 2 connecting rod, the No. 1 connecting rod is fixedly connected to the No. 3 connecting plate, and the No. 1 connecting rod is fixedly connected to the base, and the base is fixedly connected to the anti-slip rubber pad. The liquid in the liquid collecting tank is damped by the telescopic deformation of the telescopic rod and the No. 4 spring. At the same time, the No. 3 slider slides along the No. 2 slide groove to stretch and compress the No. 5 spring, thereby damping the liquid in the liquid collecting tank to prevent the liquid in the liquid collecting tank from shaking too much and overflowing from the liquid collecting tank. The invention does not solve the separation problem of liquid natural gas well, and no filtering treatment structure is set.

[0004] Therefore, we proposed a metering and separation device for natural gas component analysis and detection to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a metering and separation device for natural gas component analysis and detection, which can effectively separate liquid and gas through two collisions and improve the separation effect. The setting of the flow meter can measure the separated natural gas and facilitate the filtering treatment of the separated natural gas and liquid.

[0006] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: A metering and separation device for natural gas component analysis and detection comprises a separation box, one side of the separation box is connected to and fixed with an air inlet pipe, and the other side of the separation box is connected to and fixed with an air outlet pipe, a partition is fixedly installed in the separation box, a first baffle is fixedly connected to the bottom of the partition, a second baffle is fixedly connected to the side of the first baffle away from the air inlet pipe, the air inlet pipe is located below the partition, and its lowest end is higher than the bottom of the first baffle, a first filter is arranged on the partition, the first filter is located above the second baffle, the air outlet pipe is located above the first filter, a filter structure is movably sleeved below the first baffle in the separation box, and a discharge port is arranged at the bottom of the separation box below the filter structure.

[0007] The beneficial effects of adopting the above technical solution are:

[0008] Through the double collision of the first baffle plate and the second baffle plate, the separation of liquid and gas can be effectively achieved and the separation effect can be improved. The flow meter on the outlet pipe can measure the separated natural gas. The first filter screen and the filtering structure facilitate the filtering of the separated natural gas and liquid.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the first shielding plate is configured to have a concave arc shape on one side close to the air inlet pipe, and the bottom of the second shielding plate is configured to have a concave arc shape.

[0011] The beneficial effect of adopting the above further solution is to increase the collision area between the liquid natural gas and the baffle, thereby improving the separation effect.

[0012] Furthermore, the filtering structure includes a circular frame, one side of the circular frame is movably mounted on the inner wall of one side of the separation box, and the other sides of the circular frame are respectively in close contact with the corresponding inner walls of the separation box, a second filter screen is movably sleeved inside the circular frame, an opening corresponding to the circular frame is provided on the other side of the separation box, and a mounting block is fixedly connected to the other side of the circular frame, and a locking structure for locking the circular frame is provided extending outside the separation box and between the separation box.

[0013] The beneficial effect of adopting the above further solution is that the filter screen that has been used for a long time can be taken out and cleaned in time, which is convenient for reuse and saves costs.

[0014] Furthermore, the locking structure includes a slide groove and a moving rod, the slide groove is arranged on the side wall of the other side of the separation box, a card slot is opened on the bottom inner wall of the slide groove, the moving rod can be moved up and down in the slide groove, the bottom of one end of the moving rod is fixedly connected with a card block that cooperates with the card slot, the top of the mounting block is opened with a rectangular groove, the other end of the moving rod extends out of the side wall of the other side of the separation box, and the bottom of the other end of the moving rod is fixedly connected with a rectangular rod that cooperates with the rectangular groove.

[0015] The beneficial effect of adopting the above further solution is that the circular frame can be locked by utilizing the cooperation of the clamping block and the clamping slot, and it is convenient to remove the circular frame and replace the filter.

[0016] Furthermore, a spring is provided between the bottom of the rectangular rod and the bottom of the rectangular groove.

[0017] Beneficial effects of the above further solution: The setting of the spring can limit the position of the rectangular rod, and when installing the circular frame, the restoring force of the spring can be used to drive the rectangular rod to move downward, so that the clamping block moves into the clamping slot and the mounting block is fixed.

[0018] Furthermore, the locking structure also includes a pull ring and a connecting block, one end of the connecting block is fixedly connected to the side wall of the rectangular rod, and the other end thereof extends out of the mounting block and is fixedly connected to the pull ring, and the mounting block is provided with a groove for the connecting block to move up and down, and the depth of the groove is greater than the depth of the slot.

[0019] The beneficial effect of adopting the above further solution is that the provision of the pull ring is convenient for the user to use and can quickly take out the second filter.

[0020] Furthermore, the bottom of the separation box is provided with moving wheels.

[0021] The beneficial effect of adopting the above further solution is that it is easy to move to a suitable working position, saving time and effort.

[0022] Furthermore, the air intake pipe is arranged on the separation box in a downwardly inclined manner.

[0023] The beneficial effect of adopting the above further solution is to facilitate air intake and improve work efficiency.

[0024] Furthermore, the top of the separation box is open, and a cover plate for sealing is provided at the open top.

[0025] The beneficial effect of adopting the above further solution is that it is easy to clean the internal impurities.

[0026] Furthermore, a through hole extending vertically is provided on the partition plate, the through hole is movably sleeved with the first filter screen, and the first filter screen is fixedly connected to the bottom of the cover plate via a connecting rod.

[0027] The beneficial effect of adopting the above further solution is that the first filter screen can be taken out while opening the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a metering and separation device for natural gas component analysis and detection proposed by the utility model;

[0029] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0030] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] 100. Separation box; 101. Cover plate; 1. Partition plate; 2. Inlet pipe; 3. First baffle plate; 4. Second baffle plate; 5. Through hole; 6. First filter screen; 7. Outlet pipe; 8. Flow meter; 9. Round frame; 10. Second filter screen; 11. Mounting block; 12. Rectangular groove; 13. Rectangular rod; 14. Spring; 15. Moving rod; 16. Slide groove; 17. Card slot; 18. Card block. DETAILED DESCRIPTION

[0033] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0034] Embodiment 1:

[0035] like Figure 1-3 As shown, in this embodiment, a metering and separation device for natural gas component analysis and detection includes a separation box 100, the left side of the separation box 100 is connected and fixed with an air inlet pipe 2, and the right side of the separation box 100 is connected and fixed with an air outlet pipe 7, a partition 1 is fixedly installed in the separation box 100, the bottom of the partition 1 is fixedly connected with a first baffle plate 3, the first baffle plate 3 is fixedly connected with a second baffle plate 4 on the side away from the air inlet pipe 7, the air inlet pipe 2 is located below the partition 1, and its lowest end is higher than the bottom of the first baffle plate 3, a first filter screen 6 is arranged on the partition 1, the first filter screen 6 is located above the second baffle plate 4, the air outlet pipe 7 is located above the first filter screen 6, and a flow meter 8 is installed, a filtering structure is movably sleeved below the first baffle plate 3 in the separation box 100, and a discharge port is provided at the bottom of the separation box 100 below the filtering structure.

[0036] The beneficial effects of this embodiment are as follows: by arranging two collisions of the first baffle plate 3 and the second baffle plate 4 at the bottom of the partition 1, the separation of liquid and gas can be effectively achieved and the separation effect can be improved. The flow meter 8 is arranged on the outlet pipe 7 to measure the separated natural gas. The first filter screen 6 can separate the natural gas, and the filtering structure can filter the separated liquid and then discharge it from the outlet.

[0037] Further, if Figure 2 As shown, the bottom inner wall of the separation box 100 is inclined, and the lower end is close to the discharge port to facilitate the rapid discharge of materials.

[0038] Furthermore, a valve is provided in the discharge port to facilitate the control of the discharge of materials.

[0039] Furthermore, the separation box 100 is in a rectangular parallelepiped shape, and may also be in a cube shape, or other shapes.

[0040] Furthermore, a first mounting hole is opened on the left inner wall of the separation box 100, and the inner wall of the first mounting hole is fixedly connected to the outer side of the air inlet pipe 2. A second mounting hole and a third mounting hole are opened on the right inner wall of the separation box 100, and the inner wall of the second mounting hole is fixedly connected to the outer side of the air outlet pipe 7, and the inner wall of the third mounting hole is fixedly connected to the outer side of the discharge pipe.

[0041] Example 2

[0042] Preferably, on the basis of Embodiment 1, the first shielding plate 3 is configured to be a concave arc shape on a side close to the air intake pipe 2, and the bottom of the second shielding plate 4 is configured to be a concave arc shape.

[0043] The beneficial effects of this embodiment are: the arc-shaped structure of the first baffle plate 3 increases the collision area between the liquid natural gas and the first baffle plate 3, which can accelerate the separation of oil and gas. The arc-shaped structure of the second baffle plate 4 increases the collision area between the liquid natural gas and the second baffle plate 4, so that a small amount of liquid contained in the natural gas is dispersed by collision, further improving the separation effect.

[0044] Further, if Figure 2 As shown, the first shielding plate 3 is tilted to the right to try to make the liquid-containing natural gas entering the intake pipe 2 contact the first shielding plate 3; the second shielding plate 4 is tilted upward to try to make the natural gas containing a small amount of liquid contact the second shielding plate 4 after one collision.

[0045] Example 3

[0046] Preferably, on the basis of Examples 1-2, the filtering structure includes a circular frame 9, one side of the circular frame 9 is movably mounted on the inner wall of one side of the separation box 100, and the other sides of the circular frame 9 are respectively in close contact with the corresponding inner walls of the separation box 100, a second filter screen 10 is movably sleeved in the circular frame 9, and an opening corresponding to the circular frame 9 is provided on the other side of the separation box 100, and a mounting block 11 is fixedly connected to the other side of the circular frame 9, the mounting block extends out of the separation box 100 and a locking structure for locking the circular frame 9 is provided between the separation box 100.

[0047] The beneficial effect of this embodiment is that the second filter screen 10 used for a long time can be taken out and cleaned in time, which is convenient for reuse and saves costs.

[0048] It should be noted that the remaining sides of the circular frame 9 are in close contact with the corresponding inner side walls of the separation box 100 to prevent the unfiltered liquid from directly flowing out of the discharge port.

[0049] Furthermore, the mounting block 11 includes a horizontal portion and a vertical portion, one end of the horizontal portion is fixedly connected to the circular frame 9, and the other end thereof extends out of the separation box 100 and is fixedly connected to the vertical portion, and a locking structure for locking the circular frame 9 is provided between the vertical portion and the separation box 100.

[0050] Furthermore, a slot is provided on the right inner wall of the separation box 100, a first plug block is fixedly connected to the right side of the circular frame 9, the outer side of the first plug block is in movably contact with the inner wall of the slot, and a rectangular through hole is provided on the left inner wall of the separation box 100, the inner wall of the rectangular through hole is in movably contact with the outer side of the circular frame 9 and the outer side of the mounting block 11.

[0051] Furthermore, a ferrule is fixedly connected to the inner walls on both sides of the circular frame 9, a second plug-in block is fixedly connected to both sides of the bottom of the second filter screen 10, the second plug-in block is movably inserted in the corresponding ferrule, and a semicircular ring is fixedly connected to the top of the second filter screen 10 to facilitate the removal of the second filter screen 10.

[0052] Example 4

[0053] Preferably, on the basis of Example 3, the locking structure includes a slide groove 16 and a moving rod 15, the slide groove 16 is arranged on the side wall of the other side of the separation box 100, and a slot 17 is provided on the bottom inner wall of the slide groove 16, and the moving rod 15 can be arranged in the slide groove 16 to be movable up and down, and a block 18 that cooperates with the slot 17 is fixedly connected to the bottom of one end of the moving rod 15, and a rectangular groove 12 is provided on the top of the mounting block 11, and the other end of the moving rod 15 extends out of the side wall of the other side of the separation box 100, and the other end of the moving rod 15 is fixedly connected to the bottom of a rectangular rod 13 that cooperates with the rectangular groove 12.

[0054] The beneficial effect of this embodiment is that the circular frame 9 can be locked by the cooperation between the clamping block 18 and the clamping slot 17, and it is convenient to take out the circular frame 9 and replace the second filter screen 10.

[0055] Example 5

[0056] Preferably, on the basis of Embodiment 3-4, a spring 14 is provided between the bottom of the rectangular rod 13 and the bottom of the rectangular groove 12 .

[0057] The beneficial effect of this embodiment is that the setting of the spring 14 can limit the position of the rectangular rod 13, and when installing the circular frame 9, the restoring force of the spring 14 can be used to drive the rectangular rod 13 to move downward, thereby realizing that the clamping block 18 moves into the clamping groove 17, so that the mounting block 11 is fixed.

[0058] Example 6

[0059] Preferably, on the basis of Examples 4-5, the locking structure also includes a pull ring and a connecting block, one end of the connecting block is fixedly connected to the side wall of the rectangular rod 13, and the other end thereof extends out of the mounting block 11 and is fixedly connected to the pull ring, and the mounting block 11 is provided with a groove for the connecting block to move up and down, and the depth of the groove is greater than the depth of the slot 17.

[0060] The beneficial effect of this embodiment is that the setting of the pull ring is convenient for the user to use and can quickly take out the second filter.

[0061] Furthermore, a through hole is provided on the left inner wall of the rectangular groove 12 for the connection block to pass through, and the connection block can slide through the through hole; the groove can pass through the top of the vertical part, or it can not pass through, as long as the depth of the groove is greater than the depth of the slot 17, the pull ring can move upward to drive the block 18 to disengage from the slot 17.

[0062] Example 7

[0063] Preferably, based on embodiments 1-6, the bottom of the separation box 100 is provided with moving wheels.

[0064] The beneficial effects of this embodiment are: it is easy to move to a suitable working position, saving time and effort.

[0065] On the basis of the above embodiment, a locking mechanism may be provided on the moving wheel, and when the moving wheel is moved to a suitable position, the moving wheel is locked to prevent the device from moving.

[0066] It should be noted that the locking mechanism of this embodiment is prior art and will not be further described.

[0067] Example 8

[0068] Preferably, on the basis of Embodiments 1-7, the air intake pipe 2 is arranged on the separation box 100 in a downwardly inclined manner.

[0069] The beneficial effects of this embodiment are: facilitating air intake and improving work efficiency.

[0070] Example 9

[0071] Preferably, on the basis of embodiments 1-8, the top of the separation box 100 is open, and a cover plate 101 for sealing is provided at the open portion.

[0072] The beneficial effect of this embodiment is that it is easy to clean the internal impurities.

[0073] Furthermore, thread grooves are provided on both sides of the top of the separation box 100, and T-shaped bolts are threadedly sleeved in the thread grooves. The tops of the T-shaped bolts extend above the cover plate 101, and the cover plate 101 is threadedly sleeved on the two T-shaped bolts.

[0074] Example 10

[0075] Preferably, on the basis of Embodiment 9, a through hole 5 penetrating from top to bottom is opened on the partition 1, the through hole 5 is movably sleeved with the first filter screen 6, and the first filter screen 6 is fixedly connected to the bottom of the cover plate 101 by a connecting rod.

[0076] The beneficial effect of this embodiment is that the first filter screen 6 can be taken out when the cover plate 101 is opened.

[0077] Working principle: When in use, when natural gas is separated, the liquid-containing natural gas enters the separation box 100 through the air inlet pipe 2. The liquid-containing natural gas first collides with the first baffle plate 3 to disperse, and the oil passes through the second filter screen 10 downward under the action of its own gravity and enters the bottom inner wall of the separation box 100. The gas floats up and collides with the second baffle plate 4 for the second time, so that a small amount of liquid contained in the natural gas is collided and dispersed, and the liquid passes through the second filter screen 10 again and enters the bottom inner wall of the separation box 100. At the same time, the natural gas, under the action of its own buoyancy, passes through the first activated carbon filter screen 6 and is discharged through the air outlet pipe 7 and the flow meter 8 in turn, so as to achieve the purpose of separating natural gas and liquid. Through two collisions, the separation of liquid and gas can be effectively realized, and the separation effect can be improved. At the same time, the flow meter 8 measures the flow of natural gas flowing through;

[0078] The second filter screen 10 filters impurities in the liquid flowing through, and the first activated carbon filter screen 6 adsorbs impurities in the natural gas flowing through, thereby achieving the purpose of filtering the natural gas and liquid in the separation process. When used for a long time and the second filter screen 10 needs to be taken out for cleaning, the pull ring is pushed upward to drive the rectangular rod 13 to move upward, and the rectangular rod 13 slides upward in the rectangular groove 12 and stretches the spring 14, and the rectangular rod 13 drives the moving rod 15 to move upward, and the moving rod 15 drives the clamping block 18 to separate upward from the clamping groove 17, and the fixation of the mounting block 11 is released. At this time, the mounting block 11 can be moved to the left, and the mounting block 11 drives the circular frame 9 to move to the left, and the circular frame 9 drives the second filter screen 10 to move out of the separation box 100 to the left. At this time, the semicircular ring can be pulled upward, and the semicircular ring drives the filter screen 10 to move upward, and the second filter screen 10 drives the two second plug-in blocks to be removed from the corresponding card sleeves respectively. At this time, the second filter screen 10 can be cleaned. After cleaning, The second filter screen 10 is placed in the circular frame 9, and the second filter screen 10 drives the two second plug-in blocks to be inserted into the corresponding card sleeves respectively, and then the pull ring is pushed upward again and the mounting block 11 is moved to the right, and the mounting block 11 drives the circular frame 9 to move into the separation box 100, and the mounting block 11 drives the rectangular rod 13, the moving rod 15 and the card block 18 to move in turn, and the moving rod 15 and the card block 18 gradually move into the slide groove 16. When the left inner wall of the mounting block 11 contacts the left side of the separation box 100, the pushing of the mounting block is stopped, and then the upward thrust of the pull ring is relaxed. At this time, the elastic force of the spring 14 in the stretched state drives the rectangular rod 13 to move downward, and the rectangular rod 13 drives the moving rod 15 to move downward, and the moving rod 15 drives the card block 18 to move downward into the card slot 17, and the card block 18 is clamped with the card slot 17, so that the mounting block 11 is fixed and the installation is completed, so that it is convenient to quickly realize the disassembly and assembly of the second filter screen 10 by a simple push, so that the second filter screen 10 is convenient to clean.

[0079] The beneficial effects of the utility model are:

[0080] Through the two collisions, the separation of liquid and gas can be effectively achieved and the separation effect can be improved. The setting of the flow meter 8 can measure the separated natural gas, which is convenient for filtering the separated natural gas and liquid, and is convenient for quickly realizing the disassembly and assembly of the second filter 10 by a simple push, so as to facilitate the cleaning of the second filter 10 and meet the use requirements.

[0081] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system 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 invention.

[0082] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A metering and separation device for natural gas component analysis and detection, characterized in that: The invention comprises a separation box (100), one side of which is connected to and fixed with an air inlet pipe (2), and the other side of which is connected to and fixed with an air outlet pipe (7). A partition (1) is fixedly installed in the separation box (100), a first baffle (3) is fixedly connected to the bottom of the partition (1), a second baffle (4) is fixedly connected to the side of the first baffle (3) away from the air inlet pipe (2), the air inlet pipe (2) is located below the partition (1), and its lowest end is higher than the bottom of the first baffle (3), a first filter (6) is arranged on the partition (1), the first filter (6) is located above the second baffle (4), the air outlet pipe (7) is located above the first filter (6), and a flow meter (8) is installed. A filtering structure is movably sleeved below the first baffle (3) in the separation box (100), and a discharge port is arranged below the filtering structure at the bottom of the separation box (100).

2. A metering and separation device for natural gas component analysis and detection according to claim 1, characterized in that: The first shielding plate (3) is arranged in a concave arc shape on one side close to the air inlet pipe (2), and the bottom of the second shielding plate (4) is arranged in a concave arc shape.

3. The metering and separation device for natural gas component analysis and detection according to claim 1, characterized in that: The filtering structure comprises a circular frame (9), one side of the circular frame (9) is movably mounted on the inner wall of one side of the separation box (100), and the other sides of the circular frame (9) are respectively in close contact with the corresponding inner walls of the separation box (100), a second filter screen (10) is movably sleeved in the circular frame (9), an opening corresponding to the circular frame (9) is provided on the other side of the separation box (100), and a mounting block (11) is fixedly connected to the other side of the circular frame (9), the mounting block (11) extends out of the separation box (100) and a locking structure for locking the circular frame (9) is provided between the mounting block (11) and the separation box (100).

4. A metering and separation device for natural gas component analysis and detection according to claim 3, characterized in that: The locking structure comprises a slide groove (16) and a moving rod (15); the slide groove (16) is arranged on the other side wall of the separation box (100); a card slot (17) is provided on the bottom inner wall of the slide groove (16); the moving rod (15) is arranged in the slide groove (16) so as to be movable up and down; a card block (18) is fixedly connected to the bottom of one end of the moving rod (15) and is matched with the card slot (17); a rectangular groove (12) is provided on the top of the mounting block (11); the other end of the moving rod (15) extends out of the other side wall of the separation box (100); and the other end of the moving rod (15) is fixedly connected to the bottom of a rectangular rod (13) which is matched with the rectangular groove (12).

5. A metering and separation device for natural gas component analysis and detection according to claim 4, characterized in that: A spring (14) is provided between the bottom of the rectangular rod (13) and the bottom of the rectangular groove (12).

6. A metering and separation device for natural gas component analysis and detection according to claim 4, characterized in that: The locking structure also includes a pull ring and a connecting block, one end of the connecting block is fixedly connected to the side wall of the rectangular rod (13), and the other end thereof extends out of the mounting block (11) and is fixedly connected to the pull ring, and the mounting block (11) is provided with a slot for the connecting block to move up and down, and the depth of the slot is greater than the depth of the clamping slot (17).

7. A metering and separation device for natural gas component analysis and detection according to any one of claims 1 to 6, characterized in that: The bottom of the separation box (100) is provided with moving wheels.

8. A metering and separation device for natural gas component analysis and detection according to any one of claims 1 to 6, characterized in that: The air intake pipe (2) is arranged on the separation box (100) in a downwardly inclined manner.

9. A metering and separation device for natural gas component analysis and detection according to any one of claims 1 to 6, characterized in that: The top of the separation box (100) is open, and a cover plate (101) for sealing is provided at the open top.

10. A metering and separation device for natural gas component analysis and detection according to claim 9, characterized in that: The partition plate (1) is provided with a through hole (5) which passes through from top to bottom, and the through hole (5) is movably sleeved with the first filter screen (6), and the first filter screen (6) is fixedly connected to the bottom of the cover plate (101) via a connecting rod.

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