Straight-through type ultrasonic gas meter

Abstract

The invention relates to a straight-through type ultrasonic gas meter which comprises a gas meter steel shell, a gas inlet pipe, a gas outlet pipe and a front steel cover. The front steel cover is assembled on the gas meter steel shell, and the front steel cover and the gas meter steel shell jointly define a containing cavity. The gas inlet pipe and the gas outlet pipe are located at the two ends of the gas meter steel shell respectively, and the gas inlet pipe and the gas outlet pipe are opposite in direction. The air inlet pipe and the air outlet pipe are communicated with the accommodating cavity; the ultrasonic sensor is simple in structure, gas enters the containing cavity of the gas meter from the gas inlet pipe by arranging the valve mechanism, and after the gas is guided by the valve guide plate assembly of the valve mechanism, gas flow flows to the bottom of the gas meter base meter and then returns to enter a flow channel gas inlet of the ultrasonic metering module; and a plurality of exhaust holes are formed, so that the entering gas can be dispersed, the gas flow field structure is optimized, and the metering precision is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic gas meters, and in particular relates to a straight-through ultrasonic gas meter. Background Art

[0002] The mainstream gas meters in the current domestic market are designed and developed in accordance with the "GB / T6968-2019 National Standard for Diaphragm Gas Meters", and the gas meter joints are designed in parallel. However, some overseas countries use a straight-through meter structure, with the air inlet and outlet on the same pipeline axis. The straight-through gas meters produced by domestic manufacturers are limited in style and have no valve structure. The gas meter valve has a practical effect on the safety of gas use and the management of gas companies' users. It is a powerful component for optimizing the functions of gas meters and strengthening safety control. The patent of this invention redesigns the solution of valveless straight-through gas meters currently on the market.

[0003] In view of the above problems, it is necessary to improve them. Summary of the invention

[0004] The object of the present invention is to provide a straight-through ultrasonic gas meter with a simple structure, ingenious design, reduced parts assembly and improved integration.

[0005] In order to achieve the above purpose, the technical solution adopted by the patent of the present invention is: a straight-through ultrasonic gas meter, including a gas meter steel shell, an air inlet pipe, an air outlet pipe and a front steel cover; the front steel cover is assembled on the gas meter steel shell, and the front steel cover and the gas meter steel shell together form a accommodating cavity; the air inlet pipe and the air outlet pipe are respectively located at the two ends of the gas meter steel shell, and the directions of the air inlet pipe and the air outlet pipe are opposite; the air inlet pipe and the air outlet pipe are connected with the accommodating cavity; a valve mechanism, an ultrasonic metering module and a drainage pipe are installed in the accommodating cavity; wherein one end of the drainage pipe is connected to the ultrasonic metering module, and the other end is connected to the air outlet pipe; the valve mechanism is connected to the air inlet pipe, and is used to control the on-off of the gas flow path in the gas meter.

[0006] As a preferred solution of the present invention, the valve mechanism includes a valve guide plate assembly and a valve assembly, and the valve guide plate assembly is detachably connected to the valve assembly.

[0007] As a preferred solution of the present invention, the axis of the air inlet pipe and the axis of the air outlet pipe are both located on the center line of the steel shell of the gas meter.

[0008] As a preferred solution of the present invention, an integrated temperature and pressure sensor is installed at the bottom of the valve assembly, and a distance is left between the integrated temperature and pressure sensor and the ultrasonic metering module.

[0009] As a preferred solution of the present invention, the valve guide plate assembly includes a positioning cylinder, which is provided with a mounting portion connected to the air inlet pipe, a mounting groove is formed on the outer side of the mounting portion, and a sealing ring is sleeved on the mounting groove; a plurality of air diffusion holes are formed around the positioning cylinder.

[0010] As a preferred solution of the present invention, a mounting plate is formed in the mounting portion, the mounting plate is located at the connection between the positioning tube and the mounting portion, a through hole is formed in the middle of the mounting plate, the through hole is connected to the positioning tube, and an assembly groove is formed at the bottom of the mounting plate.

[0011] As a preferred solution of the present invention, a symmetrically arranged snap-in plate and a locking plate are arranged on the outer side of the top of the positioning cylinder near the mounting portion; a snap-in groove is formed on the snap-in plate, and a locking hole is formed on the locking plate; a connecting portion is formed at the end of the air inlet pipe, and the connecting portion is located in the accommodating cavity.

[0012] As a preferred solution of the present invention, the connecting part includes a connecting cylinder, a connecting plate is fixedly provided at the bottom of the connecting cylinder, a connecting convex plate and a connecting locking plate are formed on the connecting plate, and a connecting hole is formed on the connecting locking plate; the mounting part extends into the connecting cylinder, and the positioning cylinder is rotated so that the connecting convex plate is assembled into the clamping groove, the locking plate corresponds to the connecting locking plate, and the locking screw passes through the connecting hole and the locking hole, so as to assemble the valve guide plate assembly at the intake pipe.

[0013] As a preferred solution of the present invention, a plurality of positioning blocks connected to the valve assembly are arranged on the outer side wall of the positioning cylinder, and the bottom of the positioning blocks is chamfered.

[0014] As a preferred solution of the present invention, the valve assembly includes a valve housing, a valve motor and a valve connector; the valve connector is fixedly arranged at the upper outer end of the valve housing and is used to connect the valve guide plate assembly, a telescopic column is installed in the valve housing, and a sealing gasket matching the assembly groove is installed at the front end of the telescopic column; the valve motor is fixedly arranged at the bottom of the valve housing, and the motor drive shaft on the valve motor extends into the valve housing and is connected to the telescopic column, controlling and driving the telescopic column to move up and down.

[0015] As a preferred solution of the present invention, the valve connector includes a valve connecting plate, which is arranged on the outside of the valve housing and has an installation notch formed on the valve connecting plate; a plurality of valve locking openings that are compatible with the positioning block are formed on the valve connecting plate, and the valve connecting plate can elastically expand to facilitate the insertion of the valve guide plate assembly, and can contract so that the positioning block abuts against the valve locking opening.

[0016] As a preferred solution of the present invention, the valve connecting plate includes more than two connecting plates distributed in a ring array, and a gap extending in the axial direction is formed between two adjacent connecting plates. The valve connecting plate can radially expand or contract through the gap.

[0017] As a preferred solution of the present invention, the valve connecting plate includes a guide slope, which is located at one end of the valve connecting plate relatively close to the positioning cylinder, and the positioning cylinder is used to abut the guide slope and guide the valve connecting plate to expand radially.

[0018] As a preferred solution of the present invention, a plurality of guide grooves with openings facing upwards are formed on the inner side of the valve connecting plate along its height direction. Correspondingly, a plurality of guide blocks adapted to the guide grooves are formed on the outer side surface of the positioning cylinder. When the positioning cylinder is connected to the valve connecting plate, the guide blocks extend into the guide grooves.

[0019] As a preferred solution of the present invention, the ultrasonic metering module is inserted into the drainage pipe and fastened by a clamp. The drainage pipe is fastened to the steel shell of the gas meter by screws, and the drainage pipe is sealed and connected to the gas outlet pipe.

[0020] As a preferred solution of the present invention, the ultrasonic metering module is connected to a metering terminal assembly; the valve assembly is connected to a valve terminal assembly; a reserved hole is formed on the front steel cover, and the metering terminal assembly and the valve terminal assembly pass through the reserved holes respectively and are locked by terminal nuts.

[0021] As a preferred solution of the present invention, the gas meter steel shell and the front steel cover are connected via a sealing ring.

[0022] The beneficial effects of the present invention are: 1. The ultrasonic sensor provided in the present invention has a simple structure. By providing a valve mechanism, the gas enters the accommodating cavity of the gas meter from the air inlet pipe. After being guided by the valve guide plate assembly of the valve mechanism, the airflow flows to the bottom position of the base of the gas meter and then returns to enter the flow channel air inlet of the ultrasonic metering module. In addition, the multiple air diffusion holes provided can disperse the incoming gas, optimize the airflow field structure, and improve the metering accuracy.

[0023] 2. The ultrasonic sensor provided in the present invention is cleverly designed. The valve assembly and the valve guide plate assembly are detachably connected and assembled at the gas meter inlet pipe. The integrated temperature and pressure sensor is arranged at the bottom of the valve assembly to prevent the gas from directly impacting the ultrasonic metering module, thereby ensuring safe use. At the same time, the connecting lines of the temperature and pressure sensors are integrated into the valve, reducing the number of assembled parts, improving integration, and increasing space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an ultrasonic flowmeter according to an embodiment of the present invention; Figure 2 is an exploded view of an ultrasonic flow meter according to an embodiment of the present invention; Figure 3This is a schematic diagram of the structure of the ultrasonic flow meter after the front steel cover is removed according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the valve mechanism of an embodiment of the present invention (open state); Figure 5 This is a structural exploded view of a valve guide plate assembly according to an embodiment of the present invention; Figure 6 This is a schematic structural diagram of a valve guide plate assembly according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the valve mechanism of an embodiment of the present invention (closed state); Figure 8 It is a structural schematic diagram of a connecting portion according to an embodiment of the present invention; Fig. 9 This is a schematic diagram of the structure of a valve assembly according to an embodiment of the present invention; Fig.10 This is a schematic diagram of an ultrasonic metering module and a drainage tube connected via a clamp according to an embodiment of the present invention; Description of the accompanying drawings: gas meter steel shell 1, valve guide plate assembly 2, integrated temperature and pressure sensor 2-a, ultrasonic metering module 3, metering terminal assembly 3-a, front steel cover 4, sealing ring 5, terminal nut 6, valve assembly 7, valve terminal assembly 7-a, valve connector 8, clamp 9, air inlet pipe 10, air outlet pipe 11, connecting part 12, connecting cylinder 12-1, connecting plate 12-2, connecting convex plate 12-3, connecting locking plate 12-4, connecting hole 12-5, guide block 13, drainage tube 14, screw 15, locking screw Nail 16, positioning block 20, chamfer 20-1, positioning cylinder 21, mounting portion 22, mounting groove 23, snap-in plate 24, locking plate 25, snap-in groove 26, locking hole 27, air diffusion hole 28, sealing ring 29, accommodating chamber 30, mounting plate 31, through hole 32, assembly groove 33, reserved hole 40, valve housing 70, valve motor 71, telescopic column 72, sealing gasket 73, valve connecting plate 80, mounting notch 81, valve locking mouth 82, connecting piece 83, gap 84, guide slope 85, guide groove 86, valve mechanism 100. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example: like Figure 1-3 As shown, Figure 1 It is a structural schematic diagram of an ultrasonic flowmeter according to an embodiment of the present invention; Figure 2 is an exploded view of an ultrasonic flow meter according to an embodiment of the present invention; Figure 3 The schematic diagram of the structure of the ultrasonic flow meter after the front steel cover is removed according to the embodiment of the present invention; specifically, a straight-through ultrasonic gas meter includes a gas meter steel shell 1, an air inlet pipe 10, an air outlet pipe 11 and a front steel cover 4; the front steel cover 4 is mounted on the gas meter steel shell 1, and the front steel cover 4 and the gas meter steel shell 1 together form a receiving cavity 30; it should be noted that due to the special function of the gas meter to measure the gas, the gas meter steel shell 1 of the gas meter should be a sealed structure to avoid gas leakage from the gas meter and ensure the accuracy of the gas meter in measuring the gas. In other words, the gas meter steel shell 1 and the front steel cover 4 should be sealed and connected to ensure the sealing of the gas meter steel shell 1 of the gas meter.

[0028] The air inlet pipe 10 and the air outlet pipe 11 are respectively located at the two ends of the gas meter steel shell 1, and the directions of the air inlet pipe 10 and the air outlet pipe 11 are opposite; in this way, the air inlet direction of the gas meter and the air outlet direction of the gas meter can be kept consistent, the gas flows more smoothly in the gas meter, and it is also convenient to measure the flow of the gas meter.

[0029] The ports of the air inlet pipe 10 and the air outlet pipe 11 are both exposed to the outside, and the air inlet pipe 10 and the air outlet pipe 11 are connected to the accommodating chamber 30; the air inlet pipe 10 and the air outlet pipe 11 are used to allow the gas to flow through the accommodating chamber 30, and then, the gas is measured through the relevant functional components arranged in the accommodating chamber 30.

[0030] By setting the air inlet pipe 10 and the air outlet pipe 11 horizontally, the air inlet pipe 10 and the air outlet pipe 11 are matched with the extension direction of the natural gas pipeline extending horizontally after entering the house. The air inlet pipe 10 and the air outlet pipe 11 can be directly connected to the natural gas pipeline without the need to additionally install a switching elbow (or even a straight pipe); in this way, the installation efficiency of the gas meter can be improved and the installation cost of the gas meter can be reduced.

[0031] The accommodating chamber 30 is equipped with a valve mechanism 100, an ultrasonic metering module 3 and a drainage tube 14; one end of the drainage tube 14 is connected to the ultrasonic metering module 3, and the other end is connected to the outlet pipe 11; the valve mechanism 100 is connected to the inlet pipe 10, and is used to control the on-off of the gas flow path in the gas meter.

[0032] During operation, the gas in the natural gas pipeline enters the accommodating cavity 30 of the gas meter from the air inlet pipe 10, and after being guided by the valve guide plate assembly 2 of the valve mechanism 100, the gas flows to the bottom position of the gas meter base and then returns to the flow channel air inlet of the ultrasonic metering module 3. The ultrasonic metering module 3 measures the flow rate of the gas; after the gas flows out from the air outlet of the ultrasonic metering module 3, it enters the air outlet pipe 11, and enters the air outlet end of the natural gas pipeline from the air outlet pipe 11; wherein, the valve mechanism 100 is used to control the on-off of the gas flow path in the gas meter.

[0033] The valve mechanism 100 includes a valve guide plate assembly 2 and a valve assembly 7, and the valve guide plate assembly 2 and the valve assembly 7 are detachably connected, which facilitates the overall connection and disassembly, provides convenience for subsequent maintenance, and can also improve the assembly efficiency of the two.

[0034] The axis of the air inlet pipe 10 and the axis of the air outlet pipe 11 are both located on the center line of the gas meter steel shell 1; with this arrangement, the gas meter steel shell 1 has good symmetry and more balanced force, and the structural strength of the gas meter steel shell 1 is better, which can improve the overall structural strength and reliability of the gas meter steel shell 1, and also help to improve the appearance of the gas meter, and make the overall space occupied by the gas meter smaller, which is conducive to saving the installation space of the gas meter.

[0035] The ultrasonic metering module 3 is connected to a metering terminal assembly 3-a; the valve assembly 7 is connected to a valve terminal assembly 7-a; a reserved hole 40 is formed on the front steel cover 4, and the metering terminal assembly 3-a and the valve terminal assembly 7-a pass through the reserved holes 40 respectively and are locked by terminal nuts 6; there are sealing rings on the metering terminal assembly 3-a and the valve terminal assembly 7-a, which pass through the reserved holes 40 of the front steel cover 4, are locked by terminal nuts 6 respectively, and are compressed and sealed by the sealing rings.

[0036] In addition, if Figure 4 As shown, the bottom of the valve assembly 7 is equipped with an integrated temperature and pressure sensor 2-a, and a distance is left between the integrated temperature and pressure sensor 2-a and the ultrasonic metering module 3; the integrated temperature and pressure sensor 2-a is fixed to the bottom of the valve assembly 7 to prevent the gas from directly impacting the ultrasonic metering module 3, thereby ensuring safe use, improving metering accuracy, and optimizing the airflow field structure.

[0037] At the same time, the integrated temperature and pressure sensor 2-a is located in the middle area of ​​the accommodating cavity 30 of the gas meter to avoid external temperature interference as much as possible. At the same time, it is also close to the accessories of the ultrasonic metering module 3, and is used to detect the temperature and pressure near the ultrasonic metering module 3, and to leave a certain air intake space for the ultrasonic metering module 3 to ensure the metering accuracy of the ultrasonic metering module 3.

[0038] like Figure 5-Figure 6 The valve guide plate assembly 2 shown includes a positioning cylinder 21, on which is disposed a mounting portion 22 connected to the air intake pipe 10, a mounting groove 23 is formed on the outer side of the mounting portion 22, and a sealing ring 29 is sleeved on the mounting groove 23; a plurality of air diffusion holes 28 are formed in the circumference of the positioning cylinder 21.

[0039] A valve guide plate assembly 2 is provided to allow the gas to enter the accommodating cavity 30 of the gas meter from the air inlet pipe 10. After being guided by the valve guide plate assembly 2, the airflow flows to the bottom position of the base of the gas meter and then returns to enter the flow channel air inlet of the ultrasonic metering module 3. In addition, the multiple air dispersion holes 28 provided can disperse the incoming gas, optimize the airflow field structure, and improve the metering accuracy.

[0040] A mounting plate 31 is formed in the mounting portion 22 , and the mounting plate 31 is located at the connection between the positioning tube 21 and the mounting portion 22 . A through hole 32 is formed in the middle of the mounting plate 31 , and the through hole 32 is connected to the positioning tube 21 . An assembly groove 33 is formed at the bottom of the mounting plate 31 .

[0041] A symmetrically arranged snap-in plate 24 and a locking plate 25 are arranged on the outer side of the top of the positioning cylinder 21 near the mounting portion 22; a snap-in groove 26 is formed on the snap-in plate 24, and a locking hole 27 is formed on the locking plate 25; a connecting portion 12 is formed at the end of the intake pipe 10, and the connecting portion 12 is located in the accommodating cavity 30.

[0042] like Figure 8 As shown, Figure 8Schematic diagram of the structure of the connection part of the embodiment of the present invention; specifically, the connection part 12 includes a connection tube 12-1, a connection plate 12-2 is fixedly provided at the bottom of the connection tube 12-1, a connection convex plate 12-3 and a connection locking plate 12-4 are formed on the connection plate 12-2, and a connection hole 12-5 is formed on the connection locking plate 12-4; the mounting portion 22 extends into the connection tube 12-1, and the positioning tube 21 is rotated so that the connection convex plate 12-3 is assembled into the clamping groove 26, and the lock is The tightening plate 25 corresponds to the connecting locking plate 12-4, and the locking screw 16 passes through the connecting hole 12-5 and the locking hole 27, and is used to assemble the valve guide plate assembly 2 at the intake pipe 10; a plurality of positioning blocks 20 connected to the valve assembly 7 are arranged on the outer wall of the positioning cylinder 21, and a chamfer 20-1 is provided at the bottom of the positioning block 20; in this way, the chamfer 20-1 abuts against the guide slope 85 of the valve connecting plate 80, so that the positioning block 20 is plugged and engaged with the valve locking port 82.

[0043] like Fig. 9 As shown, Fig. 9 7 is a schematic diagram of the structure of the valve assembly of an embodiment of the present invention; specifically, the valve assembly 7 includes a valve housing 70, a valve motor 71 and a valve connector 8; the valve connector 8 is fixedly arranged at the upper outer end of the valve housing 70, and is used to connect the valve guide plate assembly 2, a telescopic column 72 is installed in the valve housing 70, and a sealing gasket 73 adapted to the assembly groove 33 is installed at the front end of the telescopic column 72; the valve motor 71 is fixedly arranged at the bottom of the valve housing 70, and the motor drive shaft on the valve motor 71 extends into the valve housing 70 and is connected to the telescopic column 72, controlling and driving the telescopic column 72 to move up and down; the sealing gasket 73 is made of rubber elastic deformation material, specifically, the motor drive shaft of the valve motor 71 is connected to the telescopic column 72 and controls the rotation of the telescopic column 72, driving the telescopic column 72 to move; when the sealing gasket 73 and the assembly groove 33 on the mounting plate 31 are in contact with each other, the entire accommodating chamber 30 is a sealed structure (such as Figure 7 As shown in FIG. 1 ), when the sealing gasket 73 is not in contact with the assembly groove 33 on the mounting plate 31, the entire accommodating cavity 30 is an unsealed structure (as shown in FIG. 1 ). Figure 4 As shown); the valve stroke is controlled by controlling the valve motor 71, and the sealing gasket 73 and the assembly groove 33 have two states of sealing and non-sealing, thereby controlling the closed and non-closed states of the accommodating chamber 30 to meet the use conditions under different working conditions.

[0044] The valve connector 8 includes a valve connecting plate 80, which is arranged on the outer side of the valve housing 70 and is provided with an installation notch 81; the valve connecting plate 80 is provided with a plurality of valve locking openings 82 adapted to the positioning block 20, and the valve connecting plate 80 can be elastically expanded to facilitate the insertion of the valve guide plate assembly 2, and can be contracted so that the positioning block 20 abuts against the valve locking opening 82.

[0045] The valve connecting plate 80 includes more than two connecting plates 83 distributed in a ring array, and a gap 84 extending axially is formed between two adjacent connecting plates 83. The valve connecting plate 80 can expand or contract radially through the gap 84; the multiple gaps 84 can provide deformation space for the elastic contraction and elastic expansion of each connecting plate 83 of the valve connecting plate 80, reduce the difficulty of installation, and avoid damage to the connecting plate 83 during the plug-in process; preferably, in the present embodiment, the connecting plate 83 is provided with a total of 4 gaps 84, and the sizes of adjacent gaps 84 are equal. It can be understood that in other embodiments, the number and size of the gaps 84 can be set according to usage requirements.

[0046] The valve connecting plate 80 includes a guide bevel 85, which is located at one end of the valve connecting plate 80 relatively close to the positioning cylinder 21. The positioning cylinder 21 is used to abut the guide bevel 85 and guide the radial expansion of the valve connecting plate 80. Such a configuration can make the connection between the bottom of the positioning cylinder 21 and the guide bevel 85 smoother, improve the assembly efficiency of the positioning cylinder 21, and facilitate the valve connecting plate 80 to elastically contract or expand more safely and stably.

[0047] A plurality of guide grooves 86 with openings facing upward are formed on the inner side of the valve connecting plate 80 along its height direction. Correspondingly, a plurality of guide blocks 13 that are compatible with the guide grooves 86 are formed on the outer surface of the positioning cylinder 21. When the positioning cylinder 21 is connected to the valve connecting plate 80, the guide blocks 13 extend into the guide grooves 86. Such a configuration can ensure that the positioning cylinder 21 can more conveniently enter the valve connecting member 8, effectively improve the convenience of assembly, and facilitate the connection between the positioning cylinder 21 and the valve connecting member 8.

[0048] like Fig.10 As shown, Fig.10 This is a schematic diagram of an ultrasonic metering module and a drainage tube being connected via a clamp in an embodiment of the present invention; the ultrasonic metering module 3 is inserted into the drainage tube 14 and fastened via the clamp 9; the drainage tube 14 is fastened to the steel shell 1 of the gas meter via screws 15; the drainage tube 14 is sealed and connected to the gas outlet pipe 11; specifically, the ultrasonic metering module 3 and the drainage tube 14 are compressed and sealed via a sealing ring, and are fixed and limited via the clamp 9; the ultrasonic metering module 3, the drainage tube 14 and the clamp 9 assembly are compressed and sealed with the gas outlet pipe 11 via a sealing ring, and are locked via screws and the threaded structure of the gas outlet.

[0049] Taking the example that the gas meter steel shell 1 and the front steel cover 4 are both made of metal materials, the gas meter steel shell 1 and the front steel cover 4 are connected by fasteners such as bolts and screws, and a sealing ring such as a silicone ring or a rubber ring is arranged between the gas meter steel shell 1 and the front steel cover 4; finally, in this embodiment, the gas meter steel shell 1 and the front steel cover 4 are connected by a sealing ring 5.

[0050] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0051] Although this article uses more figure marks in the figure: gas meter steel shell 1, valve guide plate assembly 2, integrated temperature and pressure sensor 2-a, ultrasonic metering module 3, metering terminal assembly 3-a, front steel cover 4, sealing ring 5, terminal nut 6, valve assembly 7, valve terminal assembly 7-a, valve connector 8, clamp 9, air inlet pipe 10, air outlet pipe 11, connecting part 12, connecting cylinder 12-1, connecting plate 12-2, connecting convex plate 12-3, connecting locking plate 12-4, connecting hole 12-5, guide block 13, drainage pipe 14, screw 15, locking screw 16, fixed The block 20, chamfer 20-1, positioning cylinder 21, mounting portion 22, mounting groove 23, clamping plate 24, locking plate 25, clamping groove 26, locking hole 27, air diffusion hole 28, sealing ring 29, accommodating chamber 30, mounting plate 31, through hole 32, assembly groove 33, reserved hole 40, valve housing 70, valve motor 71, telescopic column 72, sealing gasket 73, valve connecting plate 80, mounting notch 81, valve locking port 82, connecting piece 83, gap 84, guide slope 85, guide groove 86, valve mechanism 100 and other terms are used, but the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A straight-through ultrasonic gas meter, characterized in that: The invention comprises a gas meter steel shell (1), an air inlet pipe (10), an air outlet pipe (11) and a front steel cover (4); the front steel cover (4) is mounted on the gas meter steel shell (1), and the front steel cover (4) and the gas meter steel shell (1) together form a receiving chamber (30); the air inlet pipe (10) and the air outlet pipe (11) are respectively located at two ends of the gas meter steel shell (1), and the air inlet pipe (10) and the air outlet pipe (11) are oriented in opposite directions; the air inlet pipe (10) and the air outlet pipe (11) are connected to the receiving chamber (30); a valve mechanism (100), an ultrasonic metering module (3) and a drainage pipe (14) are mounted in the receiving chamber (30); one end of the drainage pipe (14) is connected to the ultrasonic metering module (3), and the other end is connected to the air outlet pipe (11); the valve mechanism (100) is connected to the air inlet pipe (10) and is used to control the on-off of the gas flow path in the gas meter.

2. A straight-through ultrasonic gas meter according to claim 1, characterized in that: The valve mechanism (100) comprises a valve guide plate assembly (2) and a valve assembly (7), wherein the valve guide plate assembly (2) and the valve assembly (7) are detachably connected.

3. A straight-through ultrasonic gas meter according to claim 2, characterized in that: An integrated temperature and pressure sensor (2-a) is installed at the bottom of the valve assembly (7), and a distance is left between the integrated temperature and pressure sensor (2-a) and the ultrasonic metering module (3).

4. A straight-through ultrasonic gas meter according to claim 2, characterized in that: The valve guide plate assembly (2) comprises a positioning cylinder (21), a mounting portion (22) connected to an air intake pipe (10) is arranged on the positioning cylinder (21), a mounting groove (23) is formed on the outer side of the mounting portion (22), and a sealing ring (29) is sleeved on the mounting groove (23); a plurality of air diffusion holes (28) are formed in the circumference of the positioning cylinder (21); a mounting plate (31) is formed inside the mounting portion (22), the mounting plate (31) is located at the connection between the positioning cylinder (21) and the mounting portion (22), a through hole (32) is formed in the middle of the mounting plate (31), the through hole (32) is connected to the positioning cylinder (21), and an assembly groove (33) is formed at the bottom of the mounting plate (31).

5. A straight-through ultrasonic gas meter according to claim 4, characterized in that: A symmetrically arranged snap-in plate (24) and a locking plate (25) are arranged at the outer side of the top of the positioning cylinder (21) near the mounting portion (22); a snap-in groove (26) is formed on the snap-in plate (24), and a locking hole (27) is formed on the locking plate (25); a connecting portion (12) is formed at the end of the air intake pipe (10), and the connecting portion (12) is located in the accommodating cavity (30); the connecting portion (12) includes a connecting cylinder (12-1), a connecting plate (12-2) is fixedly provided at the bottom of the connecting cylinder (12-1), a connecting protrusion (12-3) and a connecting locking plate (12-4) are formed on the connecting plate (12-2), and the connecting locking plate (12-4) is connected to the connecting cylinder (12-1). A connecting hole (12-5) is formed on the plate (12-4); the mounting portion (22) extends into the connecting cylinder (12-1), and the positioning cylinder (21) is rotated so that the connecting protruding plate (12-3) is assembled into the clamping groove (26), the locking plate (25) corresponds to the connecting locking plate (12-4), and the locking screw (16) passes through the connecting hole (12-5) and the locking hole (27) to assemble the valve guide plate assembly (2) at the intake pipe (10); a plurality of positioning blocks (20) connected to the valve assembly (7) are arranged on the outer wall of the positioning cylinder (21), and the bottom of the positioning blocks (20) is provided with a chamfer (20-1).

6. A straight-through ultrasonic gas meter according to claim 2, characterized in that: The valve assembly (7) comprises a valve housing (70), a valve motor (71) and a valve connector (8); the valve connector (8) is fixedly mounted on the upper outer end of the valve housing (70) and is used to connect the valve guide plate assembly (2); a telescopic column (72) is mounted in the valve housing (70); a sealing gasket (73) adapted to the assembly groove (33) is mounted at the front end of the telescopic column (72); the valve motor (71) is fixedly mounted on the bottom of the valve housing (70); a motor drive shaft on the valve motor (71) extends into the valve housing (70) and is connected to the telescopic column (72), thereby controlling and driving the telescopic column (72) to move up and down.

7. A straight-through ultrasonic gas meter according to claim 6, characterized in that: The valve connecting member (8) comprises a valve connecting plate (80), which is arranged on the outside of the valve housing (70), and a mounting notch (81) is formed on the valve connecting plate (80); a plurality of valve locking openings (82) adapted to the positioning block (20) are formed on the valve connecting plate (80), and the valve connecting plate (80) can be elastically expanded to facilitate the insertion of the valve guide plate assembly (2), and can be contracted to allow the positioning block (20) to abut against the valve locking opening (82).

8. A straight-through ultrasonic gas meter according to claim 7, characterized in that: The valve connection plate (80) comprises two or more connection plates (83) distributed in an annular array, a gap (84) extending in the axial direction is formed between two adjacent connection plates (83), and the valve connection plate (80) can radially expand or contract through the gap (84).

9. A straight-through ultrasonic gas meter according to claim 7, characterized in that: The valve connecting plate (80) comprises a guiding inclined surface (85), wherein the guiding inclined surface (85) is located at one end of the valve connecting plate (80) relatively close to the positioning cylinder (21), and the positioning cylinder (21) is used to abut against the guiding inclined surface (85) and guide the valve connecting plate (80) to expand radially.

10. The straight-through ultrasonic gas meter according to claim 8, characterized in that: The valve connecting plate (80) is provided with a plurality of guide grooves (86) with openings facing upwards formed on the inner side thereof along its height direction. Correspondingly, the outer side surface of the positioning cylinder (21) is provided with a plurality of guide blocks (13) adapted to the guide grooves (86). When the positioning cylinder (21) is connected to the valve connecting plate (80), the guide blocks (13) extend into the guide grooves (86).

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