Sealing device for gas sonic nozzle flowmeter

Abstract

The utility model discloses a sealing device for a gas sonic nozzle flowmeter, which belongs to the field of sealing devices for gas flowmeters, and is characterized in that a sealing device I and a sealing device II are respectively arranged at the end parts between two gas pipelines; then the gas sonic nozzle flowmeter is installed between the first sealing device and the second sealing device, so that gas enters the gas sonic nozzle flowmeter through one gas pipeline and the first sealing device and then is exhausted through the second sealing device and the other gas pipeline, and normal flowing of the gas is not disturbed; meanwhile, at the moment when the gas sonic nozzle flowmeter is detached and taken away, push rods on the sealing device I and the sealing device II are not extruded and are ejected outwards to be reset by a supporting spring, so that a circular valve plate is driven to be vertically reset in a flange seat body, and the interior of the sealing device I or the sealing device II is sealed; therefore, the residual gas in the corresponding gas pipeline can be prevented from overflowing, and the safety of the gas sonic nozzle flowmeter during disassembly and assembly is improved.

Description

Technical Field

[0001] The utility model relates to the field of gas flow meter sealing devices, and more specifically to a gas sonic nozzle flow meter sealing device. Background Art

[0002] A gas flow meter is a device used to detect gas flow. Depending on the structural type, one type is a gas sonic nozzle flow meter. Since the gas flow meter is installed between two interconnected gas pipelines, although valves are installed on both gas pipelines, some gas will still remain inside the gas pipeline between the valve and the gas flow meter when the gas flow meter is disassembled and replaced. After the gas flow meter is removed, the gas remaining inside the two gas pipelines will inevitably overflow, which is not conducive to the safety of the gas flow meter when it is disassembled and replaced. Therefore, we propose a gas sonic nozzle flow meter sealing device to solve the above problems. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a sealing device for a gas sonic nozzle flowmeter, which respectively installs a sealing device one and a sealing device two at the ends between two gas pipelines, and then installs the gas sonic nozzle flowmeter between the sealing device one and the sealing device two, so that the gas enters the gas sonic nozzle flowmeter through a gas pipeline and the sealing device one, and then is discharged through the sealing device two and the other gas pipeline, without interfering with the normal flow of the gas. At the same time, at the moment when the gas sonic nozzle flowmeter is disassembled and removed, the push rods on the sealing device one and the sealing device two lack the compression and are pushed outward and reset by the supporting spring, thereby driving the circular valve plate to vertically reset inside the flange seat body, sealing the inside of the sealing device one or the sealing device two, thereby preventing the residual gas inside the corresponding gas pipeline from overflowing, and improving the safety of the gas sonic nozzle flowmeter during disassembly and assembly.

[0005] 2. Technical solution

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A gas sonic nozzle flowmeter sealing device, comprising a sealing device 1, a sealing device 2 and a gas sonic nozzle flowmeter, wherein the sealing device 1 and the sealing device 2 have the same structure and are arranged in reverse symmetry, and the sealing device 1 and the sealing device 2 are respectively fixedly installed on the vents on both sides of the gas sonic nozzle flowmeter, and the other sides of the sealing device 1 and the sealing device 2 are also respectively fixedly installed with gas pipelines;

[0008] The sealing device 1 includes a flange seat body fixedly installed between the gas pipeline and the gas sonic nozzle flowmeter, a circular valve plate is arranged inside the cavity of the flange seat body, a pressure taking interface end is fixedly connected to the outer wall of the top of the flange seat body, and a cap is threadedly connected to the pressure taking interface end, an outer shell is symmetrically fixedly installed on both sides of the outer wall of the flange seat body, two mounting holes are provided on the flange seat body at the positions corresponding to the outer shell, the interior of the outer shell is a cylindrical cavity structure, one end of the cavity inside the outer shell is connected to the mounting hole, and the other end of the cavity inside the outer shell is a sealing structure.

[0009] Furthermore, a positioning plate is fixedly installed on the mounting hole, a push rod is slidably connected inside the positioning plate, and one end of the push rod extends into the cavity of the outer shell, and the other end of the push rod contacts the outer edge of the vent portion on the corresponding side of the gas sonic nozzle flowmeter.

[0010] Furthermore, a sliding plate is fixedly welded on one end of the push rod located inside the shell cavity, and one side of the sliding plate is in contact with one end inside the shell cavity via a supporting spring.

[0011] Furthermore, axial holes are opened on both sides of the outer wall of the flange seat body corresponding to the shell installation position, the axial holes are connected with the corresponding interior of the shell cavity, the two axial holes are rotatably connected by a rotating shaft, and the rotating shaft and the circular valve plate are fixedly installed by a plurality of connecting parts.

[0012] Furthermore, a gear is fixedly installed on the end of the rotating shaft located inside the cavity of the shell, a plurality of teeth are opened at the bottom of the push rod, the top of the gear is meshed with the corresponding bottom of the push rod through the teeth, and a positioning pile is fixedly welded on the top of the push rod.

[0013] Furthermore, the length of the push rod is smaller than the length of the outer shell, and a rubber sealing ring is fixedly attached to the outer edge of the circular valve plate.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] In this solution, sealing device 1 and sealing device 2 are respectively installed at the ends between the two gas pipelines, and then the gas sonic nozzle flowmeter is installed between sealing device 1 and sealing device 2, so that the gas enters the gas sonic nozzle flowmeter through a gas pipeline and sealing device 1, and then is discharged through sealing device 2 and another gas pipeline, without interfering with the normal flow of the gas. At the same time, at the moment when the gas sonic nozzle flowmeter is disassembled and removed, the push rods on sealing device 1 and sealing device 2 lack compression and are pushed outward and reset by the supporting spring, thereby driving the circular valve plate to vertically reset inside the flange seat body, sealing the inside of sealing device 1 or sealing device 2, thereby preventing the residual gas inside the corresponding gas pipeline from overflowing, and improving the safety of the gas sonic nozzle flowmeter during disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a structural schematic diagram of a sealing device of the utility model;

[0019] Figure 3 This is a schematic diagram of a disassembled structure of a sealing device of the utility model;

[0020] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 It is a schematic diagram of the shaft hole of the utility model.

[0022] Description of the numbers in the figure:

[0023] 1. Sealing device 1; 2. Flange seat; 201. Mounting hole; 202. Shaft hole; 3. Round valve plate; 4. Housing; 5. Positioning plate; 6. Push rod; 601. Positioning pile; 7. Sliding plate; 8. Support spring; 9. Rotating shaft; 10. Connecting piece; 11. Gear; 12. Sealing device 2; 13. Gas sonic nozzle flowmeter; 14. Gas pipeline. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the specification of the present invention; obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field without making creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0025] Embodiment 1:

[0026] See also Figure 1-Figure 5 A gas sonic nozzle flow meter sealing device comprises a sealing device 1, a sealing device 2 12 and a gas sonic nozzle flow meter 13, wherein the sealing device 1 and the sealing device 2 12 have the same structure and are arranged in reverse symmetry, and the sealing device 1 and the sealing device 2 12 are respectively fixedly installed on the vents on both sides of the gas sonic nozzle flow meter 13, and the other sides of the sealing device 1 and the sealing device 2 12 are also respectively fixedly installed with gas pipelines 14;

[0027] The sealing device 1 comprises a flange seat body 2 fixedly installed between a gas pipeline 14 and a gas sonic nozzle flowmeter 13, a circular valve plate 3 is arranged inside the cavity of the flange seat body 2, a pressure-taking interface end is fixedly connected to the outer wall at the top of the flange seat body 2, and a cap is threadedly connected to the pressure-taking interface end, a shell 4 is symmetrically fixedly installed on both sides of the outer wall of the flange seat body 2, two mounting holes 201 are provided on the flange seat body 2 at positions corresponding to the shell 4, the interior of the shell 4 is a cylindrical cavity structure, one end of the cavity inside the shell 4 is connected to the mounting hole 201, and the other end of the cavity inside the shell 4 is a sealing structure;

[0028] A positioning piece 5 is fixedly installed on the mounting hole 201, and a push rod 6 is slidably connected inside the positioning piece 5, and one end of the push rod 6 extends to the cavity of the shell 4, and the other end of the push rod 6 contacts the outer edge of the vent portion on the corresponding side of the gas sonic nozzle flowmeter 13. A sliding piece 7 is fixedly welded on one end of the push rod 6 located inside the cavity of the shell 4, and one side of the sliding piece 7 contacts one end of the cavity of the shell 4 through a supporting spring 8. Shaft holes 202 are provided on both sides of the outer wall of the flange seat body 2 at the mounting position of the corresponding shell 4, and the shaft holes 202 are connected with the corresponding cavity of the shell 4. The two shaft holes 202 are rotatably connected through a rotating shaft 9, and the rotating shaft 9 and the circular valve plate 3 are fixedly installed by a plurality of connecting members 10. A gear 11 is fixedly installed on the end of the rotating shaft 9 located inside the cavity of the shell 4, and a plurality of teeth are provided at the bottom of the push rod 6. The top of the gear 11 meshes with the bottom of the corresponding push rod 6 through the teeth, and a positioning pile 601 is fixedly welded on the top of the push rod 6.

[0029] The operating principle of the gas sonic nozzle flowmeter sealing device is:

[0030] First, install the sealing device 1 and the sealing device 2 12 on the ends of the two gas pipelines 14 respectively, and then install the gas sonic nozzle flowmeter 13 between the sealing device 1 and the sealing device 2 12. During installation, the outer edges of the vents on both sides of the gas sonic nozzle flowmeter 13 are first contacted and squeezed with the exposed ends of the two push rods 6 on the sealing device 1 and the sealing device 2 12 respectively, so as to cause the push rods 6 to move inward. At this time, the support spring 8 inside the cavity of the shell 4 is compressed while driving the gear 11 at the bottom of the push rod 6 to rotate. Since the gear 11 is fixedly installed with the circular valve plate 3 through the rotating shaft 9, the circular valve plate 3 can be driven to rotate to a horizontal state, opening the cavity channel of the flange seat body 2, and then the gas sonic nozzle flowmeter 13 can be fixedly installed at the connection by bolts, and the gas can pass through a gas pipeline 14 through the interior of the sealing device 1 to enter the gas sonic nozzle flowmeter 13, and then be discharged through the sealing device 2 12 and the other gas pipeline 14;

[0031] When it is necessary to remove the gas sonic nozzle flowmeter 13, first close the valves at the far ends of the two gas pipelines 14, then remove the bolts to remove the gas sonic nozzle flowmeter 13. At the same time, the exposed ends of the two push rods 6 on the sealing device 1 and the sealing device 2 12 are quickly reset due to the lack of extrusion, and during the reset process, the gear 11 is reversed through the engagement of the teeth, and then the rotating shaft 9 and the circular valve plate 3 are reversed to the reset state. At this time, the circular valve plate 3 is in a vertical state, sealing the cavity channel of the flange seat body 2, thereby achieving a sealing effect and preventing the remaining gas in the gas pipeline 14 from overflowing.

[0032] Embodiment 2:

[0033] In view of the above embodiment 1, for further description, refer to Figure 3 The length of the push rod 6 is smaller than the length of the housing 4, and a rubber sealing ring is fixedly attached to the outer edge of the circular valve plate 3.

[0034] Because the length of the push rod 6 is shorter than that of the housing 4 , interference can be prevented when the push rod 6 moves. The rubber sealing ring can improve the sealing of the connection. The positioning pile 601 fixedly welded on the top of the push rod 6 can limit the reset of the push rod 6.

[0035] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A gas sonic nozzle flowmeter sealing device, comprising a sealing device 1 (1), a sealing device 2 (12) and a gas sonic nozzle flowmeter (13), characterized in that: The sealing device 1 (1) and the sealing device 2 (12) have the same structure and are arranged in reverse symmetry, and the sealing device 1 (1) and the sealing device 2 (12) are respectively fixedly installed on the vents on both sides of the gas sonic nozzle flowmeter (13), and the other sides of the sealing device 1 (1) and the sealing device 2 (12) are also respectively fixedly installed with gas pipelines (14); The sealing device (1) comprises a flange seat body (2) fixedly mounted between the gas pipeline (14) and the gas sonic nozzle flowmeter (13); a circular valve plate (3) is arranged inside the cavity of the flange seat body (2); a pressure-taking interface end is fixedly connected to the top outer wall of the flange seat body (2), and a cover cap is threadedly connected to the pressure-taking interface end; a shell (4) is symmetrically fixedly mounted on both sides of the outer wall of the flange seat body (2); two mounting holes (201) are provided on the flange seat body (2) at positions corresponding to the shell (4); the inside of the shell (4) is a cylindrical cavity structure, and one end of the cavity inside the shell (4) is connected to the mounting hole (201); the other end of the cavity inside the shell (4) is a sealing structure.

2. A gas sonic nozzle flowmeter sealing device according to claim 1, characterized in that: A positioning plate (5) is fixedly mounted on the mounting hole (201), a push rod (6) is slidably connected inside the positioning plate (5), and one end of the push rod (6) extends into the cavity of the housing (4), and the other end of the push rod (6) contacts the outer edge of the vent portion on the corresponding side of the gas sonic nozzle flowmeter (13).

3. A gas sonic nozzle flowmeter sealing device according to claim 2, characterized in that: A slide plate (7) is fixedly welded to one end of the push rod (6) located inside the cavity of the shell (4), and one side of the slide plate (7) is in contact with one end inside the cavity of the shell (4) via a supporting spring (8).

4. A gas sonic nozzle flowmeter sealing device according to claim 3, characterized in that: Axial holes (202) are provided on both sides of the outer wall of the flange seat body (2) at the installation position corresponding to the outer shell (4); the axial holes (202) are connected to the interior of the corresponding cavity of the outer shell (4); the two axial holes (202) are rotatably connected via a rotating shaft (9); and the rotating shaft (9) and the circular valve plate (3) are fixedly installed via a plurality of connecting parts (10).

5. A gas sonic nozzle flowmeter sealing device according to claim 4, characterized in that: A gear (11) is fixedly mounted on the end of the rotating shaft (9) located inside the cavity of the housing (4); a plurality of tooth openings are provided at the bottom of the push rod (6); the top of the gear (11) meshes with the corresponding bottom of the push rod (6) through the tooth openings; and a positioning pile (601) is fixedly welded to the top of the push rod (6).

6. A gas sonic nozzle flowmeter sealing device according to claim 5, characterized in that: The length of the push rod (6) is shorter than the length of the housing (4), and a rubber sealing ring is fixedly attached to the outer edge of the circular valve plate (3).

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