Flow channel shell of ultrasonic gas metering device, ultrasonic gas metering device and ultrasonic gas meter

Abstract

The utility model provides an ultrasonic fuel gas metering device's runner casing, ultrasonic fuel gas metering device and ultrasonic fuel gas meter, the runner casing includes the casing, be equipped with the runner that the fuel gas passes through in the casing, be equipped with the gas inlet and the gas outlet that communicate with the runner at the both ends of the casing, be equipped with the gas inlet and the gas outlet that communicate with the gas inlet. The shell is further provided with two detection ports communicated with the flow channel, and each detection port is provided with an ultrasonic transducer mounting seat; the two side walls of the shell are respectively provided with the PCB dustproof sealing boxes, and the PCB dustproof sealing boxes are integrally connected with the shell through injection molding.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meters, in particular to a flow channel housing of an ultrasonic gas metering device, an ultrasonic gas metering device and an ultrasonic gas meter. Background Art

[0002] Ultrasonic gas meters are new, fully electronic instruments that utilize the time difference between ultrasonic waves traveling through a medium for measurement. They offer high reliability, high accuracy, and a wide range. With the implementation of national standards and verification procedures for ultrasonic gas meters, these meters, with their unique advantages, are widely used in the measurement of natural gas, liquefied petroleum gas, and other combustible gases.

[0003] At present, the flow channel body of the ultrasonic gas metering device mostly adopts a structure with upper and lower separation. A gas guide device is installed at the opening of the flow channel body, and then the flow channel cover is assembled and fixed by hot melt columns. For example, an ultrasonic gas metering device and its integrated flow channel housing disclosed in the patent authorization announcement date CN219416329U, combined with Figure 1 As shown, the metering device includes a flow channel housing, which includes an upper shell and a lower shell, on which an ultrasonic probe is arranged, wherein the upper shell and the lower shell are sealed with glue and fixed by hot melt; the circuit board is fixed at the upper cover; since the existing ultrasonic gas metering device has no protection mechanism for the circuit board, a large amount of dust will adhere to its surface after long-term operation, causing the temperature of the electronic components on its surface to rise, resulting in a shortened service life and some unnecessary damage; therefore, some ultrasonic gas metering devices have begun to add a dustproof sealing box at the upper cover to fix the PCB circuit board in the dustproof sealing box.

[0004] However, this design makes it easy for components to fall off when the ultrasonic gas metering device vibrates or falls, for example, the upper cover falls off the flow channel body, the dustproof sealing box falls off the upper cover, and the circuit board falls off the dust cover, thereby disconnecting the electrical connection between the circuit board and the ultrasonic probe.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0006] The purpose of the utility model is to address the deficiencies of the prior art and thus provide a flow channel housing of an ultrasonic gas metering device, an ultrasonic gas metering device and an ultrasonic gas meter.

[0007] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a flow channel housing of an ultrasonic gas metering device, comprising a shell, a flow channel for gas to pass through is provided in the shell, an air inlet and an air outlet connected to the flow channel are further provided on the shell, and two detection ports connected to the flow channel are further provided on the shell, each of the detection ports is provided with an ultrasonic transducer mounting seat;

[0008] A PCB circuit board dustproof sealing box is respectively provided on the two side walls of the shell, and the PCB circuit board dustproof sealing box is connected to the shell through injection molding.

[0009] The beneficial effects of the above technical solution are: since the PCB circuit board dustproof sealing box is connected to the shell of the flow channel housing through injection molding, the corresponding installation structure is eliminated, the installation and connection process is reduced, and labor costs can be saved; and when vibrated or dropped, it will not fall off from the shell of the flow channel housing, and the structure is more solid and stable.

[0010] Furthermore, a heat-melting column is provided in the dust-proof sealing box of the PCB circuit board, and the heat-melting column matches the heat-melting hole on the PCB circuit board to fix the PCB circuit board.

[0011] Furthermore, in order to protect key components on the circuit board, such as MCU chips, from being damaged during use and affecting product functions, a key component protection part is also provided in the PCB circuit board dustproof sealing box. It can be understood that the key component protection part corresponds to the key components on the circuit board. Specifically, the key component protection part includes a protective circle formed by multiple baffles or fences. When the circuit board is installed in the PCB circuit board dustproof sealing box, the key components on the circuit board also fall into the protective circle to protect the key components.

[0012] Furthermore, since the ultrasonic gas metering device normally includes two ultrasonic transducers, each connected to a circuit board, directional indicators are provided on the two side walls of the housing, corresponding to the PCB dustproof sealing boxes, to distinguish the PCBs corresponding to the different ultrasonic transducers. Preferably, the directional indicators are left, right, first, second, or other symbols.

[0013] Furthermore, the ultrasonic transducer mounting base is integrally connected to the housing via injection molding. In this case, the housing is a one-piece structure, and the flow channel is directly integrated with the ultrasonic transducer mounting base. Compared to traditional structures, this eliminates the need for adhesive sealing and hot-melt sealing to secure and seal the housing, reducing both the production process and sealant costs.

[0014] Furthermore, the two detection ports are both located at the top or bottom of the housing; or, the two detection ports are located at the top and bottom of the housing, respectively, and are diagonally distributed. Specifically, the choice of two detection ports located on the same side or two detection ports located on opposite sides and distributed diagonally can be determined based on the actual on-site environment. In either case, the flow channel can be connected to the ultrasonic transducer mounting base.

[0015] The second aspect of the present invention provides an ultrasonic gas metering device, comprising a gas flow channel, two ultrasonic transducers connected to the gas flow channel, and a PCB circuit board electrically connected to the two ultrasonic transducers. The gas flow channel comprises a flow channel housing and a gas flow guide device arranged in the flow channel housing, and the flow channel housing adopts the aforementioned flow channel housing; the two ultrasonic transducers are respectively mounted on two ultrasonic transducer mounting seats of the gas flow channel, and the PCB circuit board is fixedly mounted in the dustproof sealing box of the PCB circuit board.

[0016] Beneficial effects: The ultrasonic gas meter connects the PCB circuit board dust-proof sealing box and the shell of the flow channel housing through injection molding, eliminating the corresponding installation structure, reducing the installation and connection process, and saving labor costs; and when vibrated or dropped, the PCB circuit board dust-proof sealing box will not fall off from the shell of the flow channel housing, and the structure is more firm and stable, thereby avoiding the PCB circuit board from falling off from the ultrasonic gas meter along with the PCB circuit board dust-proof sealing box.

[0017] A third aspect of the present invention provides an ultrasonic gas meter, comprising a meter case and a metering device disposed in the meter case, wherein the metering device adopts the aforementioned ultrasonic gas metering device.

[0018] Furthermore, an air outlet adapter is provided between the air outlet of the metering device and the outlet end of the watch case, and the air outlet adapter includes a transition section and a circular tube section connected to the transition section. The transition section is connected to the air outlet of the metering device, and the circular tube section is connected to the outlet end of the watch case.

[0019] Furthermore, the transition section is movably connected to the air outlet of the metering device, and the circular tube section is movably connected to the outlet end of the watch case.

[0020] Furthermore, the metering device is provided with an anti-fool column at the air outlet, and the transition section is provided with an anti-fool hole corresponding to the anti-fool column. The provision of the anti-fool column and the anti-fool hole facilitates the installation of the air outlet adapter on the metering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the flow channel housing of the ultrasonic gas metering device described in Example 1 of the present utility model.

[0022] Figure 2 This is a schematic diagram of the explosion structure of the ultrasonic gas metering device described in Example 2 of the present utility model.

[0023] Figure 3 This is a schematic diagram of the installation structure of the ultrasonic gas metering device described in Example 2 of the present utility model.

[0024] Figure 4 This is a schematic structural diagram of the air outlet adapter described in Example 3 of the present utility model.

[0025] In the figure: 1. Shell; 2. Air outlet; 3. Air inlet; 4. Ultrasonic transducer mounting base; 41. Ultrasonic transducer; 42. Transducer buckle; 5. PCB circuit board dustproof sealing box; 6. Flow channel fixing part; 7. Anti-fool column; 8. Sealing groove; 9. Circuit board; 10. Gas guide device; 11. Buckle assembly 1; 12. Key component protection part; 13. Hot melt column; 14. Air outlet adapter; 15. Buckle assembly 2; 16. Anti-fool hole; 17. Air outlet adapter inlet; 18. Air outlet adapter outlet. DETAILED DESCRIPTION

[0026] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0027] Example 1

[0028] This embodiment provides a flow channel housing of an ultrasonic gas metering device, such as Figure 1 As shown, it includes a shell 1, a flow channel for gas to pass through is provided in the shell 1, an air inlet 3 and an air outlet 2 connected to the flow channel are also provided on the shell 1, and two detection ports connected to the flow channel are also provided on the shell 1, and each detection port is provided with an ultrasonic transducer mounting seat 4;

[0029] A PCB circuit board dustproof sealing box 5 is respectively provided on the two side walls of the housing 1 , and the PCB circuit board dustproof sealing box 5 is integrally connected to the housing 1 by injection molding.

[0030] Since the PCB circuit board dustproof sealing box is connected to the shell 1 of the flow channel housing through injection molding, the corresponding installation structure is eliminated, the installation and connection process is reduced, and labor costs can be saved; and when vibrated or dropped, it will not fall off from the shell 1 of the flow channel housing, and the structure is more solid and stable.

[0031] Preferably, a heat-melting column 13 is provided in the PCB circuit board dust-proof sealing box 5 , and the heat-melting column 13 matches the heat-melting hole on the PCB circuit board 9 .

[0032] During use, a single-sided PCB circuit board 9 is used as the PCB circuit board, and the side of the single-sided PCB circuit board 9 provided with the circuit is facing the PCB circuit board dustproof sealing box 5 to prevent it. The single-sided PCB circuit board 9 is installed in the PCB circuit board dustproof sealing box 5 through the cooperation of the hot melt column 13 and the hot melt hole, thereby forming a sealed environment for the circuit on the single-sided PCB circuit board 9, preventing a large amount of dust from adhering to the surface of the single-sided PCB circuit board 9, causing the temperature of the electronic components on its surface to rise, affecting the performance and service life.

[0033] Furthermore, in order to protect key components on the PCB circuit board, such as the MCU chip, from being damaged during use and affecting the product function, a key component protection portion 12 is also provided in the PCB circuit board dustproof sealing box 5. It can be understood that the key component protection portion 12 corresponds to the key components on the PCB circuit board. Specifically, the key component protection portion 12 includes a protective ring formed by a plurality of baffles or fences. When the PCB circuit board 9 is installed in the PCB circuit board dustproof sealing box 5, the key components on the PCB circuit board 9 also fall into the protective ring to protect the key components.

[0034] Since the ultrasonic gas metering device normally includes two ultrasonic transducers 41, each ultrasonic transducer 41 is connected to a PCB circuit board 9. In order to distinguish the PCB circuit boards 9 corresponding to different ultrasonic transducers 41, direction indicator marks are provided on the two side walls of the housing, corresponding to the PCB circuit board dustproof sealing boxes 5. Preferably, the direction indicator marks are left, right, first, second, etc.

[0035] In one embodiment, the ultrasonic transducer mounting base 4 is connected to the shell 1 through injection molding. At this time, the shell 1 is no longer a split structure that requires glue sealing and hot melting to achieve the fixation and sealing of the shell, but is an integrally molded structure. The flow channel is directly designed as an integral part of the ultrasonic transducer mounting base 4, and the production process and sealant costs are reduced.

[0036] It should be noted that, in the structure of this embodiment, the gas guide device 10 can only be placed into the flow channel in the shell 1 from the air inlet 3 and the air outlet 2 at both ends of the shell 1 .

[0037] Furthermore, the two detection ports are both located at the top or bottom of the housing 1; or the two detection ports are located at the top and bottom of the housing 1 and are diagonally distributed. Specifically, the choice of two detection ports located on the same side or two detection ports located on opposite sides and distributed diagonally can be determined based on the actual environment on site. In either case, the flow channel can be connected to the ultrasonic transducer mounting base 4.

[0038] It is understandable that the ultrasonic transducer 41 is fixed to the ultrasonic transducer mounting base 4 using the transducer buckle 42. The ultrasonic transducer 41 mounted on one ultrasonic transducer mounting base 4 is used to transmit ultrasonic waves, and the ultrasonic transducer 41 mounted on the other ultrasonic transducer mounting base 4 is used to receive ultrasonic waves.

[0039] Furthermore, a flow channel fixing portion 6 is provided on the housing 1 for fixing the flow channel housing to a target position for subsequent ultrasonic measurement.

[0040] Example 2

[0041] The second aspect of the present invention provides an ultrasonic gas metering device, such as Figure 1-3 As shown, it includes a gas flow channel, two ultrasonic transducers 41 connected to the gas flow channel, and an ultrasonic transducer mounting base 4 electrically connected to the two ultrasonic transducers 41. The gas flow channel includes a flow channel shell and a gas guide device 10 arranged in the flow channel shell. The flow channel shell adopts the flow channel shell described in Example 1; the two ultrasonic transducers 41 are respectively mounted on the two ultrasonic transducer mounting bases 4 of the gas flow channel, and the PCB circuit board 9 is fixedly mounted in the PCB circuit board dustproof sealing box 5.

[0042] The ultrasonic gas meter in this embodiment connects the PCB circuit board dustproof sealing box 5 with the shell 1 of the flow channel housing through injection molding, eliminating the corresponding installation structure, reducing the installation and connection process, and saving labor costs; and when vibrated or dropped, the PCB circuit board dustproof sealing box 5 will not fall off from the shell 1 of the flow channel housing, and the structure is more firm and stable, thereby avoiding the PCB circuit board 9 from falling off from the ultrasonic gas meter along with the PCB circuit board dustproof sealing box 5.

[0043] It should be noted that when the flow channel housing is connected to the ultrasonic transducer mounting base 4 by injection molding, the gas flow channel is an integrated structure with good consistency and vibration resistance, but at this time the gas flow guide device 10 can only be placed in the flow channel inside the shell 1 from the air inlet 3 and the air outlet 2 at both ends of the shell 1 of the flow channel housing. Therefore, the size of the air inlet 3 and / or the air outlet 2 is larger than the size of the gas flow guide device 10, so that it is convenient to place the gas flow guide device 10 into the flow channel housing through the air inlet 3 or the air outlet 2.

[0044] Example 3

[0045] The third aspect of the present invention provides an ultrasonic gas meter, such as Figure 1-4 As shown, it includes a meter case and a metering device arranged in the meter case, and the metering device adopts the ultrasonic gas metering device described in Example 2.

[0046] Furthermore, in order to adapt to different installation methods of the flow channel housing, an air outlet adapter 14 is also provided between the air outlet 2 of the metering device and the outlet end of the watch case. The air outlet adapter 14 includes a transition section and a circular tube section connected to the transition section. The transition section is connected to the air outlet 2 of the metering device, and the circular tube section is connected to the outlet end of the watch case.

[0047] It should be noted that as long as the structures of the air outlet adapter inlet 17 and the air outlet adapter outlet 18 remain unchanged, that is, the structures of the transition section inlet and the circular tube section outlet remain unchanged, the other air-transmitting parts of the air outlet adapter 14 can be arbitrarily changed in shape to adapt to various installation methods of the flow channel main body.

[0048] It should be noted that a sealing groove 8 is further provided at the gas outlet 2 of the metering device for sealing the connection between the gas outlet 2 and the gas outlet adapter 14 .

[0049] Furthermore, the transition section is movably connected to the air outlet 2 of the metering device, and the circular tube section is movably connected to the outlet end of the watch case. Preferably, the air outlet 2 of the metering device is provided with a snap assembly 11, and the air inlet 3 of the transition section is provided with a snap assembly 2 15 that cooperates with the snap assembly 11. The transition section is connected to the air outlet 2 of the metering device via a snap. In practice, the snap assembly 11 and the snap assembly 2 serve as a snap and a slot, respectively.

[0050] Furthermore, the air outlet 2 of the metering device is provided with an anti-fool column 7, and the transition section is provided with an anti-fool hole 16 corresponding to the anti-fool column 7. The provision of the anti-fool column 7 and the anti-fool hole 16 facilitates the installation of the air outlet adapter 14 on the metering device.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. A flow channel housing for an ultrasonic gas metering device, comprising a housing, a flow channel for gas to pass through the housing, an air inlet and an air outlet at both ends of the housing, the housing further comprising two detection ports communicating with the flow channel, each of the detection ports being provided with an ultrasonic transducer mounting seat; and characterized in that: A PCB circuit board dustproof sealing box is also provided on the two side walls of the shell, and the PCB circuit board dustproof sealing box is connected to the shell through injection molding.

2. The flow channel housing of the ultrasonic gas metering device according to claim 1, characterized in that: A heat-melt column and a key component protection portion are provided in the PCB circuit board dustproof sealing box. The heat-melt column matches the heat-melt hole on the PCB circuit board. The key component protection portion includes a protection circle formed by a plurality of baffles or fences.

3. The flow channel housing of an ultrasonic gas metering device according to claim 1 or 2, characterized in that: Direction indicator marks are also provided on the two side walls of the shell corresponding to the PCB circuit board dustproof sealing box.

4. The flow channel housing of an ultrasonic gas metering device according to claim 1 or 2, characterized in that: The ultrasonic transducer mounting seat is integrally connected to the housing through injection molding.

5. The flow channel housing of the ultrasonic gas metering device according to claim 4, characterized in that: The two detection ports are both located at the top or bottom of the shell; or, the two detection ports are respectively located at the top and bottom of the shell and are distributed diagonally.

6. An ultrasonic gas metering device comprising a gas flow channel, two ultrasonic transducers communicating with the gas flow channel, and a PCB electrically connected to the two ultrasonic transducers, characterized in that: The gas flow channel includes a flow channel shell and a gas flow guide device arranged in the flow channel shell, and the flow channel shell adopts the flow channel shell described in any one of claims 1 to 5; two ultrasonic transducers are respectively installed on two ultrasonic transducer mounting seats of the gas flow channel, and the PCB circuit board is fixedly installed in the PCB circuit board dust-proof sealing box.

7. An ultrasonic gas meter, comprising a meter case and a metering device disposed in the meter case, characterized in that: The metering device adopts the ultrasonic gas metering device described in claim 6.

8. The ultrasonic gas meter according to claim 7, characterized in that: An air outlet adapter is also provided between the air outlet of the metering device and the outlet end of the watch case. The air outlet adapter includes a transition section and a circular tube section connected to the transition section. The transition section is connected to the air outlet of the metering device, and the circular tube section is connected to the outlet end of the watch case.

9. The ultrasonic gas meter according to claim 8, characterized in that: The transition section is movably connected to the air outlet of the metering device, and the circular tube section is movably connected to the outlet end of the watch case.

10. An ultrasonic gas meter according to claim 9, characterized in that: An anti-fool-proof column is provided at the air outlet of the metering device, and an anti-fool-proof hole is provided on the transition section corresponding to the anti-fool-proof column.

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