Ultrasonic gas meter with anti-magnetic interference structure

Abstract

The invention discloses an ultrasonic gas meter with an anti-magnetic interference structure. The ultrasonic gas meter comprises a quick mounting structure mounted in a first shell and a quick dismounting structure mounted in a second shell. According to the ultrasonic gas meter, through the arrangement of the quick mounting structure and the quick dismounting structure, during mounting, a fixing rod of the first shell is aligned with a fixing column of the second shell to be inserted till a triangular clamping block is clamped in a clamping groove, and then mounting of the ultrasonic gas meter can be achieved; the handle drives the ejecting block to be ejected towards the clamping groove through the connecting block, the ejecting block ejects the triangular clamping block out of the clamping groove, and then the first shell can be disassembled from the surface of the second shell, so that the purpose of quick disassembly and assembly is achieved, the assembly and disassembly process of the ultrasonic gas meter is greatly simplified, the maintenance efficiency is improved, and the maintenance complexity and the time cost are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic gas meters, and in particular to an ultrasonic gas meter with an anti-magnetic interference structure. Background Art

[0002] An ultrasonic gas meter is a metering instrument that uses ultrasonic technology to measure gas flow. It detects the gas flow through the pipeline by sending and receiving ultrasonic signals. Specifically, two ultrasonic transducers are installed inside the gas meter, one as a transmitter and the other as a receiver, which are installed on both sides of the gas pipeline. When the gas flows through the pipeline, the ultrasonic signal emitted by the transmitter will propagate in the gas and be received by the receiver on the opposite side. Since the gas flow will affect the propagation speed of the ultrasonic wave, the gas flow rate and flow rate can be calculated by measuring the propagation time difference of the ultrasonic signal in the downstream and upstream. Ultrasonic gas meters have the advantages of high precision, no moving parts, and low maintenance cost. They are suitable for accurate measurement of the flow of natural gas, liquefied petroleum gas and other gases.

[0003] During the installation process of the current ultrasonic gas meter with an anti-magnetic interference structure, its casing needs to be fixed to the pipeline by bolting to ensure the accuracy of measurement and the safety of the equipment. However, when the ultrasonic gas meter needs to be disassembled for maintenance, inspection or troubleshooting, this fastening installation method becomes more cumbersome. The operator needs to loosen multiple bolts one by one to remove the gas meter from the pipeline. The whole process is not only time-consuming and labor-intensive, but also easily causes damage to the equipment or pipeline due to improper operation, which brings inconvenience and safety hazards to the maintenance of the gas meter.

[0004] Therefore, simplifying the disassembly and assembly process of ultrasonic gas meters and improving their maintenance convenience have become urgent issues to be solved in the industry. Summary of the invention

[0005] One object of the present invention is to provide an ultrasonic gas meter with an anti-magnetic interference structure. The present invention solves the problem raised in the above background that when the ultrasonic gas meter needs to be disassembled for maintenance, inspection or troubleshooting, the traditional bolt fastening installation method becomes more cumbersome. The operator needs to loosen multiple bolts one by one to remove the gas meter from the pipeline. The whole process is not only time-consuming and labor-intensive, but also easily causes damage to the equipment or pipeline due to improper operation, which brings inconvenience and safety hazards to the maintenance of the gas meter.

[0006] An ultrasonic gas meter with an anti-magnetic interference structure according to an embodiment of the present invention comprises a quick-install structure installed inside a first shell and a quick-release structure installed inside a second shell, the quick-install structure comprising a triangular clamping block and a fixing column, the triangular clamping block being fixedly installed on the inner surface of the first shell by a fixing rod, the fixing column being fixedly connected to the inner surface of the second shell, a clamping groove being provided on the surface of the fixing column, the quick-release structure comprising a top block, a sliding groove being provided on the surface of the second shell, a connecting block being slidably connected inside the sliding groove, the top block being fixedly connected to one end of the connecting block, a handle being fixedly connected to the other end of the connecting block, a groove being provided on the outer surface of the second shell, and the handle being slidably connected inside the groove;

[0007] It also includes a valve closing structure installed on one side of the intake pipe to realize the removal of the first shell and the second shell while blocking the gas in the intake pipe, the valve closing structure includes a gear, a lever and a valve switch, a side surface of the connecting block is fixedly connected to a transmission rod, a side surface of the transmission rod is fixedly connected to a gear block, the gear is rotatably connected to the inner side surface of the second shell, the lever is fixedly connected to the side surface of the gear, and the valve switch is installed on the surface of the intake pipe;

[0008] It also includes an anti-accidental touch structure installed on the outside of the second shell to prevent the handle from being accidentally touched. The anti-accidental touch structure includes a connecting plate and a hook. The connecting plate is rotatably connected to the side surface of the second shell, and the hook is fixedly connected to the lower surface of the connecting plate.

[0009] Preferably, a slide rod is fixedly connected to the interior of the slide groove, the connection block is slidably connected to the interior of the slide groove via the slide rod, and a first spring is arranged between a side surface of the connection block and the inner wall of the slide groove.

[0010] Preferably, a pop-up structure is installed inside the fixed column, and the pop-up structure includes a second spring and a pop-up plate, and the pop-up plate is movably connected to the inside of the fixed column through the second spring.

[0011] Preferably, an air inlet pipe and an air outlet pipe are fixedly connected through the inner upper portion of the second shell to achieve the entry and exhaust of gas.

[0012] Preferably, an anti-magnetic interference pad is fixedly connected to the inner surface of the first shell, and the anti-magnetic interference pad is a four-layer material structure, the innermost layer of the anti-magnetic interference pad is an inner layer, and the interior of the inner layer is made of polyimide material.

[0013] Preferably, the outer side of the inner layer is fixedly connected with an electromagnetic shielding layer by hot-melt, and the electromagnetic shielding layer is an aluminum film.

[0014] Preferably, a structural reinforcement layer is fixedly connected to the outer side of the electromagnetic shielding layer by hot-melt, and the structural reinforcement layer is made of glass fiber reinforced plastic.

[0015] Preferably, the outer side of the structural reinforcement layer is fixedly connected with an outer layer by hot-melt, and the inner part of the outer layer is made of polycarbonate material.

[0016] Preferably, a handle is rotatably connected to the outer surface of the connecting plate, a rod body is fixedly connected to one side of the connecting plate, and a reset spring is fixedly connected between one side surface of the rod body and one side surface of the second shell for resetting the connecting plate toward the second shell surface.

[0017] Preferably, a counting switch and a counting display screen for counting the number of inspections of the ultrasonic gas meter are respectively installed on one side surface of the second housing.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention provides a quick-installation structure and a quick-disassembly structure. During installation, the fixing rod of the first shell is aligned with the fixing column of the second shell and inserted until the triangular clamping block is clamped in the inside of the clamping slot, so that the ultrasonic gas meter can be installed. When it needs to be disassembled for maintenance, the handle of the quick-disassembly structure is pressed inward, and the handle drives the top block to push in the direction of the clamping slot through the connecting block. The top block pushes the triangular clamping block out of the inside of the clamping slot, and the first shell can be removed from the surface of the second shell, so as to achieve the purpose of quick disassembly and assembly, which greatly simplifies the installation and disassembly process of the ultrasonic gas meter, improves the maintenance efficiency, and reduces the complexity and time cost of maintenance.

[0020] 2. The present invention provides a pop-up structure. After the first shell and the second shell are installed by the quick-install structure, the pop-up plate is pushed into the interior of the fixed column by the fixing rod, and the second spring is in a squeezed state. After the triangular clamping block is pushed out of the slot by the quick-release structure, the second spring is stretched and reset after the blocking of the clamping block is lost. The triangular clamping block and the fixing rod are pushed outward by the pop-up plate, so that the first shell is directly popped out from the surface of the second shell during disassembly, and the automatic pop-up disassembly of the gas meter shell is realized, which further simplifies the disassembly process, improves the convenience of maintenance, and reduces the labor intensity and operation time during maintenance.

[0021] 3. The present invention provides a valve closing structure. When the first shell and the second shell are disassembled and repaired by pressing the handle inward, the handle slides down to drive the transmission rod to slide downward, and the transmission rod drives the gear to rotate through the tooth block. The gear touches the valve switch through the lever fixedly connected to the side surface, thereby controlling the blocking of the gas in the intake pipe through the valve switch and realizing the automatic disconnection of the gas during maintenance. After the maintenance is completed, the valve switch is manually pressed to connect the gas in the intake pipe, ensuring that the gas supply can be automatically cut off when the shell is disassembled for maintenance, thereby greatly improving the safety of maintenance, simplifying the maintenance process, and ensuring the convenience of operation and the safety of personnel;

[0022] 4. The present invention provides an anti-mistouch structure, and when the ultrasonic gas meter is in normal use, the handle is blocked by a hook fixedly connected to the lower surface of the connecting plate, thereby effectively avoiding accidental movement of the handle caused by misoperation, ensuring the continuity of gas flow in normal use of the ultrasonic gas meter, and greatly improving the safety and reliability of the equipment. Through the provided counting switch and counting display screen, the connecting plate and the hook are manually opened during maintenance, and the first shell and the second shell are disassembled by the handle. After disassembly, the handle is reset, and then the connecting plate is released. The connecting plate is reset toward the surface of the second shell by the elastic force of the reset spring, thereby triggering a counting switch, and the number of times the counting switch is triggered is displayed on the counting display screen, thereby displaying the number of maintenance times of the ultrasonic gas meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of an ultrasonic gas meter with an anti-magnetic interference structure proposed by the present invention;

[0025] Figure 2 The ultrasonic gas meter with anti-magnetic interference structure proposed by the present invention Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 A schematic structural diagram of a first housing in an ultrasonic gas meter with an anti-magnetic interference structure proposed by the present invention;

[0027] Figure 4 A schematic diagram of the internal structure of a second housing in an ultrasonic gas meter with an anti-magnetic interference structure proposed by the present invention;

[0028] Figure 5 The ultrasonic gas meter with anti-magnetic interference structure proposed by the present invention Figure 4 The enlarged view of point B in the middle;

[0029] Figure 6 The ultrasonic gas meter with anti-magnetic interference structure proposed by the present invention Figure 4 Enlarged view of point C in the middle;

[0030] Figure 7 A schematic structural diagram of a quick-disassembly structure of an ultrasonic gas meter with an anti-magnetic interference structure proposed by the present invention;

[0031] Figure 8 A cross-sectional view of a second housing of an ultrasonic gas meter with an anti-magnetic interference structure proposed by the present invention;

[0032] Fig. 9 The ultrasonic gas meter with anti-magnetic interference structure proposed by the present invention Figure 8 The enlarged image of the middle D;

[0033] Fig.10 A material cross-sectional view of an anti-magnetic interference pad in an ultrasonic gas meter with an anti-magnetic interference structure proposed by the present invention;

[0034] In the figure: 1, first shell; 2, second shell; 3, air inlet pipe; 4, air outlet pipe; 5, quick-install structure; 501, fixing rod; 502, triangular clamp block; 503, fixing column; 504, clamping groove; 6, quick-release structure; 601, top block; 602, connecting block; 603, slide groove; 604, slide rod; 605, first spring; 606, groove; 607, handle; 7, pop-up structure; 701, second spring; 702, pop-up plate; 8, Anti-magnetic interference pad; 801, inner layer; 802, electromagnetic shielding layer; 803, structural reinforcement layer; 804, outer layer; 9, anti-accidental touch structure; 901, connecting plate; 902, handle; 903, hook; 904, rod body; 905, reset spring; 10, valve closing structure; 1001, transmission rod; 1002, gear block; 1003, gear; 1004, lever; 1005, valve switch; 11, counting switch; 12, counting display screen. DETAILED DESCRIPTION

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0036] refer to Figure 1-10, an ultrasonic gas meter with an anti-magnetic interference structure, comprising a quick-install structure 5 installed inside a first shell 1 and a quick-release structure 6 installed inside a second shell 2, the quick-install structure 5 comprising a triangular clamping block 502 and a fixing column 503, the triangular clamping block 502 being fixedly installed on the inner surface of the first shell 1 through a fixing rod 501, the fixing column 503 being fixedly connected to the inner surface of the second shell 2, a clamping groove 504 being provided on the surface of the fixing column 503, the quick-release structure 6 comprising a top block 601, a slide groove 603 being provided on the surface of the second shell 2, a connecting block 602 being slidably connected inside the slide groove 603, the top block 601 being fixedly connected to one end of the connecting block 602, a handle 607 being fixedly connected to the other end of the connecting block 602, and a handle 607 being provided on the outer surface of the second shell 2 There is a groove 606, and the handle 607 is slidably connected to the inside of the groove 606. During installation, the fixing rod 501 of the first shell 1 is aligned with the fixing column 503 of the second shell 2 and inserted until the triangular clamping block 502 is clamped in the inside of the clamping groove 504, so that the ultrasonic gas meter can be installed. When it needs to be disassembled and repaired, the handle 607 of the quick-release structure 6 is pressed inward, and the handle 607 drives the top block 601 to be pushed in the direction of the clamping groove 504 through the connecting block 602. The top block 601 pushes the triangular clamping block 502 out of the inside of the clamping groove 504, and the first shell 1 can be removed from the surface of the second shell 2, so as to achieve the purpose of quick disassembly and assembly, which greatly simplifies the installation and disassembly process of the ultrasonic gas meter, improves maintenance efficiency, and reduces maintenance complexity and time cost.

[0037] Embodiment 1: The interior of the slide groove 603 is fixedly connected with a slide rod 604, and the connecting block 602 is slidably connected to the interior of the slide groove 603 through the slide rod 604. A first spring 605 is arranged between a side surface of the connecting block 602 and the inner wall of the slide groove 603. A pop-up structure 7 is installed inside the fixed column 503. The pop-up structure 7 includes a second spring 701 and a pop-up plate 702. The pop-up plate 702 is movably connected to the interior of the fixed column 503 through the second spring 701. After the first shell 1 and the second shell 2 are installed through the quick-install structure 5, the pop-up plate 702 is pushed into the interior of the fixed column 503 by the fixed rod 501, and the second The spring 701 is in an extruded state. After the triangular block 502 is pushed out of the slot 504 by the quick-release structure 6, the second spring 701 is stretched and reset after losing the obstruction of the block. The triangular block 502 and the fixing rod 501 are pushed outward by the pop-up plate 702, thereby achieving the purpose of the first shell 1 being directly popped out from the surface of the second shell 2 during disassembly, realizing the automatic pop-up disassembly of the gas meter shell, further simplifying the disassembly process, improving the convenience of maintenance, and reducing the labor intensity and operation time during maintenance. The inner upper part of the second shell 2 is fixedly connected with an air inlet pipe 3 and an air outlet pipe 4 for realizing the entry and discharge of gas.

[0038] Embodiment 2: An anti-magnetic interference pad 8 is fixedly connected to the inner surface of the first shell 1. The anti-magnetic interference pad 8 is a four-layer material structure. The innermost side of the material of the anti-magnetic interference pad 8 is the inner layer 801. The inner layer 801 is made of polyimide material, so that the anti-magnetic interference pad 8 does not react with the gas. At the same time, it has good insulation performance, which can prevent the gas from directly contacting the internal electronic components and protect the internal circuit. The outer side of the inner layer 801 is fixedly connected with an electromagnetic shielding layer 802 by hot melting. The electromagnetic shielding layer 802 is an aluminum film with good conductivity. It can form a Faraday cage effect, effectively shielding external electromagnetic interference and protecting the sensitive internal ultrasonic sensor. and electronic components, the outer side of the electromagnetic shielding layer 802 is fixedly connected with a structural strengthening layer 803 by hot-melt, the structural strengthening layer 803 is made of glass fiber reinforced plastic, has high strength and rigidity, can enhance the structural stability of the gas meter, and provide certain mechanical protection to prevent external impact from damaging internal components, the outer side of the structural strengthening layer 803 is fixedly connected with an outer layer 804 by hot-melt, the inner part of the outer layer 804 is made of polycarbonate, has good impact resistance and weather resistance, can protect the internal three-layer structure from the influence of the external environment, such as temperature changes, humidity, ultraviolet rays, etc., and provide an outer surface that is easy to install and maintain.

[0039] Embodiment 3: A valve closing structure 10 installed on one side of the air intake pipe 3 for blocking the gas in the air intake pipe 3 while realizing the removal of the first shell 1 and the second shell 2, the valve closing structure 10 includes a gear 1003, a lever 1004 and a valve switch 1005, a transmission rod 1001 is fixedly connected to one side surface of the connecting block 602, a gear block 1002 is fixedly connected to one side surface of the transmission rod 1001, the gear 1003 is rotatably connected to the inner side surface of the second shell 2, the lever 1004 is fixedly connected to the side surface of the gear 1003, and the valve switch 1005 is installed on the surface of the air intake pipe 3. By setting the valve closing structure 10, when the first shell 1 is pressed inwardly by the handle 607, the valve closing structure 10 is opened. When the second shell 2 is disassembled and inspected, the handle 607 slides down to drive the transmission rod 1001 to slide downward, and the transmission rod 1001 drives the gear 1003 to rotate through the tooth block 1002. The gear 1003 touches the valve switch 1005 through the lever 1004 fixedly connected to the side surface, so as to control the blocking of the gas in the intake pipe 3 through the valve switch 1005 and realize the automatic disconnection of the gas during maintenance. After the maintenance is completed, the valve switch 1005 is manually pressed to connect the gas in the intake pipe 3, ensuring that the gas supply can be automatically cut off when the shell is disassembled for maintenance, thereby greatly improving the maintenance safety, simplifying the maintenance process, and ensuring the convenience of operation and personnel safety.

[0040] Embodiment 4: An anti-mis-touch structure 9 installed on the outside of the second shell 2 to prevent the handle 607 from being accidentally touched, the anti-mis-touch structure 9 includes a connecting plate 901 and a hook 903, the connecting plate 901 is rotatably connected to the side surface of the second shell 2, the hook 903 is fixedly connected to the lower surface of the connecting plate 901, the outer surface of the connecting plate 901 is rotatably connected with a handle 902, one side of the connecting plate 901 is fixedly connected with a rod body 904, a reset spring 905 is fixedly connected between one side surface of the rod body 904 and one side surface of the second shell 2 for realizing the reset of the connecting plate 901 toward the surface of the second shell 2, when the ultrasonic gas meter is in normal use, the handle 607 is blocked by the hook 903 fixedly connected to the lower surface of the connecting plate 901, thereby effectively avoiding accidents caused by misoperation. The handle 607 is accidentally turned, which ensures the continuity of gas flow in normal use of the ultrasonic gas meter and greatly improves the safety and reliability of the equipment. A counting switch 11 and a counting display screen 12 for counting the number of inspections of the ultrasonic gas meter are respectively installed on one side surface of the second shell 2. During inspection, the connecting plate 901 and the hook 903 are manually opened, and the first shell 1 and the second shell 2 are disassembled by the handle 607. After disassembly, the handle 607 is reset, and then the connecting plate 901 is released. The connecting plate 901 is reset toward the surface of the second shell 2 by the elastic force of the reset spring 905, thereby triggering the counting switch 11 once, and the number of times the counting switch 11 is triggered is displayed by the counting display screen 12, thereby displaying the number of inspections of the ultrasonic gas meter.

[0041] When installing the ultrasonic gas meter, first accurately align the fixing rod 501 of the first shell 1 with the fixing column 503 of the second shell 2, and gently insert it until the triangular clamp block 502 is firmly inserted into the clamping groove 504 to complete the initial fixation of the shell. At this time, the anti-magnetic interference pad 8 inside the first shell 1 begins to play a role. Its four-layer material layer structure effectively shields external electromagnetic interference, ensures the stable operation of the internal ultrasonic sensor and electronic components, and guarantees the measurement accuracy. When the gas meter needs to be disassembled for maintenance, the operator first manually opens the second shell 2, namely, the connecting plate 901 and the hook 903, release the handle 607, and then press the handle 607 to move inward, and the handle 607 drives the ejection block 601 to push into the card slot 504 through the connecting block 602 and the sliding rod 604 mechanism, and ejects the triangular card block 502 from the inside of the card slot 504. At this time, the second spring 701 is reset, and the ejection plate 702 ejects the triangular card block 502 and the fixing rod 501 outward together, so that the first shell 1 automatically pops out from the surface of the second shell 2, and quick disassembly is achieved.

[0042] During the disassembly process, the valve closing structure 10 is started synchronously, and the handle 607 slides down to drive the transmission rod 1001. Through the meshing of the tooth block 1002 and the gear 1003, the gear 1003 rotates and touches the valve switch 1005 through the lever 1004, automatically cutting off the supply of gas in the intake pipe 3 to ensure the safety of the maintenance process. After the maintenance is completed, the valve switch 1005 is manually pressed to restore the gas supply and complete the reset of the valve closing structure 10. At the same time, the connecting plate 901 is reset toward the surface of the second shell 2 under the elastic force of the reset spring 905, and the handle 607 is re-locked to avoid misoperation. Each reset process of the connecting plate 901 will trigger the counting switch 11, and the counting display screen 12 will immediately update the display of the number of maintenance times of the ultrasonic gas meter to facilitate maintenance records and management.

[0043] The entire usage process not only simplifies the installation and disassembly steps and improves maintenance efficiency, but also effectively improves the stability and durability of the gas meter in a magnetic field interference environment through the multi-layer structure design of the anti-magnetic interference pad 8, the valve closing structure 10 and the anti-accidental touch structure 9, while ensuring the safety and reliability of the equipment during normal use and maintenance.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultrasonic gas meter with an anti-magnetic interference structure, characterized in that: The invention comprises a quick-installation structure (5) installed inside a first housing (1) and a quick-release structure (6) installed inside a second housing (2), wherein the quick-installation structure (5) comprises a triangular clamping block (502) and a fixing column (503), wherein the triangular clamping block (502) is fixedly installed on the inner surface of the first housing (1) via a fixing rod (501), and the fixing column (503) is fixedly connected to the inner surface of the second housing (2), and a clamping groove (504) is provided on the surface of the fixing column (503). The disassembly structure (6) comprises a top block (601), a sliding groove (603) is provided on the surface of the second shell (2), a connecting block (602) is slidably connected inside the sliding groove (603), the top block (601) is fixedly connected to one end of the connecting block (602), the other end of the connecting block (602) is fixedly connected to a handle (607), the outer surface of the second shell (2) is provided with a groove (606), and the handle (607) is slidably connected inside the groove (606); It also includes a valve closing structure (10) installed on one side of the intake pipe (3) for realizing the removal of the first shell (1) and the second shell (2) and blocking the gas in the intake pipe (3), the valve closing structure (10) comprising a gear (1003), a lever (1004) and a valve switch (1005), a transmission rod (1001) being fixedly connected to one side surface of the connection block (602), a gear block (1002) being fixedly connected to one side surface of the transmission rod (1001), the gear (1003) being rotatably connected to the inner side surface of the second shell (2), the lever (1004) being fixedly connected to the side surface of the gear (1003), and the valve switch (1005) being installed on the surface of the intake pipe (3); It also includes an anti-accidental touch structure (9) installed on the outside of the second shell (2) for preventing the handle (607) from being accidentally touched, the anti-accidental touch structure (9) includes a connecting plate (901) and a hook (903), the connecting plate (901) is rotatably connected to the side surface of the second shell (2), and the hook (903) is fixedly connected to the lower surface of the connecting plate (901).

2. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 1, characterized in that: The interior of the slide groove (603) is fixedly connected with a slide rod (604), and the connecting block (602) is slidably connected to the interior of the slide groove (603) via the slide rod (604). A first spring (605) is provided between a side surface of the connecting block (602) and the inner wall of the slide groove (603).

3. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 1, characterized in that: A pop-up structure (7) is installed inside the fixed column (503), and the pop-up structure (7) includes a second spring (701) and a pop-up plate (702). The pop-up plate (702) is movably connected to the inside of the fixed column (503) through the second spring (701).

4. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 1, characterized in that: An air inlet pipe (3) and an air outlet pipe (4) are fixedly connected through the inner upper part of the second outer shell (2) to enable the intake and exhaust of gas.

5. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 1, characterized in that: An anti-magnetic interference pad (8) is fixedly connected to the inner surface of the first shell (1); the anti-magnetic interference pad (8) is a four-layer material structure; the innermost layer of the anti-magnetic interference pad (8) is an inner layer (801); the interior of the inner layer (801) is made of polyimide material.

6. The ultrasonic gas meter with anti-magnetic interference structure according to claim 5, characterized in that: The outer side of the inner layer (801) is fixedly connected with an electromagnetic shielding layer (802) by hot-melt, and the electromagnetic shielding layer (802) is an aluminum film.

7. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 6, characterized in that: The outer side of the electromagnetic shielding layer (802) is fixedly connected with a structural reinforcement layer (803) by hot-melt, and the structural reinforcement layer (803) is made of glass fiber reinforced plastic.

8. The ultrasonic gas meter with anti-magnetic interference structure according to claim 7, characterized in that: The outer side of the structural reinforcement layer (803) is fixedly connected to the outer layer (804) by hot-melt, and the inner part of the outer layer (804) is made of polycarbonate.

9. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 1, characterized in that: The outer surface of the connecting plate (901) is rotatably connected to a handle (902), one side of the connecting plate (901) is fixedly connected to a rod body (904), and a reset spring (905) is fixedly connected between a side surface of the rod body (904) and a side surface of the second shell (2) for realizing the reset of the connecting plate (901) toward the surface of the second shell (2).

10. The ultrasonic gas meter with an anti-magnetic interference structure according to claim 1, characterized in that: A counting switch (11) and a counting display screen (12) for counting the number of inspections of the ultrasonic gas meter are respectively installed on one side surface of the second housing (2).

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