NB remote transmission ultrasonic gas meter

Abstract

The utility model relates to the technical field of ultrasonic gas meters, in particular to an NB remote transmission ultrasonic gas meter which aims at solving the problem that a reserved pressure opening of a pressure sensor can be blocked due to direct glue pouring sealing and comprises a gas meter inner base plate, a metering fixing box, a special-shaped circuit board and a protection assembly. The metering fixing box is installed on a base plate in the gas meter and located beside the ultrasonic flow channel, two ultrasonic transducers are arranged in the ultrasonic flow channel, and the two ultrasonic transducers are both connected with the special-shaped circuit board; the special-shaped circuit board comprises a main body part and a special-shaped part, and the temperature and pressure sensor is arranged on the special-shaped part; one end of the metering fixing box is open, the main body part is arranged in the metering fixing box, the special-shaped part protrudes out of the opening of the metering fixing box and is arranged in the protection assembly, and the protection assembly is movably installed at the opening of the metering fixing box. The protection device has the effect of improving the protection capability of the temperature and pressure sensor.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic gas meters, and in particular to a NB remote ultrasonic gas meter. Background Art

[0002] NB remote ultrasonic gas meter is a smart gas meter that combines traditional ultrasonic gas meter and NB-IoT (narrowband Internet of Things) technology. NB remote ultrasonic gas meter transmits the collected data, meter operation status and other related information to the background regularly, which can realize network meter reading, remote valve control, remote price adjustment, network payment, fault detection, smart alarm and other functions. The realization of the smart alarm function requires timely and accurate monitoring of abnormal pressure in the gas pipeline.

[0003] In order to meet the above functions, a temperature and pressure sensor is installed inside the NB remote ultrasonic gas meter. For the temperature and pressure collection of the gas meter, the collected temperature and pressure data must be real-time data inside the meter body. The temperature and pressure collection circuit needs to be exposed inside the gas and in direct contact with the gas. The corrosiveness of the gas will destroy electronic components, and the water content of the gas in some places is high, which will also adhere to the electronic components and create the risk of short circuit. Ordinary electronic components can be protected by injecting epoxy resin, but since the pressure sensor needs to have a pressure port, direct injection and sealing will block the pressure port, so it needs to be improved. Utility Model Content

[0004] In order to improve the protection capability of the temperature and pressure sensors in the NB remote ultrasonic gas meter, the present application provides a NB remote ultrasonic gas meter.

[0005] The NB remote ultrasonic gas meter provided in this application adopts the following technical solution:

[0006] A NB remote ultrasonic gas meter comprises a gas meter inner substrate, a metering fixed box, a special-shaped circuit board and a protection component, wherein the gas meter inner substrate is arranged inside the gas meter, the metering fixed box is installed on the gas meter inner substrate and is located beside an ultrasonic flow channel, two ultrasonic transducers are arranged in the ultrasonic flow channel, and both ultrasonic transducers are connected to the special-shaped circuit board; the special-shaped circuit board comprises a main body and a special-shaped part, and a temperature and pressure sensor is arranged on the special-shaped part; one end of the metering fixed box is open, the main body is arranged in the metering fixed box, the special-shaped part protrudes from the opening of the metering fixed box, the special-shaped part is arranged in the protection component, and the protection component is movably installed at the opening of the metering fixed box.

[0007] By adopting the above technical solution, the temperature and pressure sensors are designed on the special-shaped part and will not be covered by the colloid during potting. In order to protect the temperature and pressure sensors and achieve an anti-corrosion effect, after potting and before the colloid cures, the protection component is installed on the special-shaped part. At this time, the protection component is inserted into the epoxy resin colloid in the metering fixing box, forming a sealed space, which has a good protection effect on the temperature and pressure sensors.

[0008] Optionally, the protection component includes an intermediate connecting piece and a protection box. The intermediate connecting piece is clamped at the connection between the special-shaped part and the main body part, and the intermediate connecting piece is snap-connected to the metering fixing box; an epoxy resin potting cavity is formed between the surface of the main body part, the outer surface of the intermediate connecting piece and the inner wall of the metering fixing box, and epoxy resin is poured into the potting cavity; one end of the protection box is open, the protection box is sleeved on the special-shaped part, and the open end of the protection box is inserted into the epoxy resin colloid between the outer surface of the intermediate connecting piece and the inner wall of the metering fixing box.

[0009] By adopting the above technical solution, during installation, the operator installs the main body part into the metering fixing box through the opening of the metering fixing box, sleeving the intermediate connecting piece on the connection between the special-shaped part and the main body part until the intermediate connecting piece is snap-connected to the metering fixing box, making it difficult for the main body part to move, and completing the fixing of the special-shaped circuit board. The operator pours epoxy resin into the potting cavity until the epoxy resin fills the potting cavity but does not cover the special-shaped part. While the colloid has not solidified, the operator passes the protection box through the opening over the special-shaped part and then inserts it into the epoxy resin colloid in the metering fixing box, forming a sealed space.

[0010] Optionally, a circular hole is provided on the side wall of the protection box, and a hydrophobic film covers the circular hole.

[0011] By adopting the above technical solution, the hydrophobic film has the effect of preventing water but not gas. The gas of the fuel gas passes through the circular hole and contacts the temperature and pressure sensors, and the water vapor is isolated outside by the hydrophobic film, reducing the possibility of corrosion and improving the protection effect.

[0012] Optionally, a first abutting block is provided on the inner wall of the protection box far from the opening; two opposite first slope blocks are provided inside the protection box.

[0013] By adopting the above technical solution, the operator holds the protection box, passes the protection box through the opening over the special-shaped part, and finely adjusts the position of the protection box through the two first slope blocks until the side wall of the first abutting block abuts against the side wall of the special-shaped part. At this time, the side plate of the protection box is inserted into the epoxy resin colloid, forming a sealed space.

[0014] Optionally, the intermediate connecting member includes a square connecting ring and four connecting feet. The four connecting feet are arranged at the four corners of the square connecting ring. The square connecting ring is sleeved at the connection between the special-shaped part and the main body part. The four connecting feet are respectively located on both sides in the thickness direction of the main body part. There is a gap between the square connecting ring and the metering fixing box. The end of the connecting foot away from the square connecting ring is set as a hook body.

[0015] Optionally, a clamping plate is installed on the inner wall of the metering fixing box near the opening. The cross section of the clamping plate is a right triangle. The hook body cooperates with the clamping plate. The length of the clamping plate is greater than the length of the connecting ring, that is, the distance between the mutually remote side walls of the two connecting feet on the same side.

[0016] By adopting the above technical solution, after the main body part is installed, the special-shaped part is located between the two clamping plates. The operator sleeves the square connecting ring on the special-shaped part from the end far away from the main body part. The four connecting feet are respectively located on both sides in the thickness direction of the main body part. When the square connecting ring is about to reach the connection between the special-shaped part and the main body part, the hook body abuts against the clamping plate, and the hook body and the connecting foot undergo elastic deformation until the hook body and the clamping plate are clamped and fixed to each other, realizing the positioning and fixing of the main body part and the special-shaped part.

[0017] Optionally, a second abutting block is installed on the side wall of the metering fixing box far away from the opening, a third abutting block is installed on one side wall of the metering fixing box, and a second slope block is installed on the side wall opposite to the third abutting block.

[0018] Optionally, two groups of clamping strips are installed on the inner wall of the metering fixing box. The two groups of clamping strips are arranged oppositely. The two groups of clamping strips are respectively located on both sides in the thickness direction of the main body part. The two groups of clamping strips are arranged in a staggered manner. The clamping strips are located at the corners far away from the opening of the metering fixing box.

[0019] By adopting the above technical solution, when the operator inserts the main body part into the box body through the opening of the metering fixing box, the second slope block can guide the main body part to move towards the third abutting block until the side wall of the main body part abuts against the side walls of the second abutting block and the third abutting block. At this time, the side walls of the two groups of clamping strips respectively abut against the side walls of the main body part in the thickness direction, jointly realizing the functions of positioning and fixing the main body part.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. Design the temperature and pressure sensors on the special-shaped part so that they are not covered by the colloid during potting. To protect the temperature and pressure sensors and achieve an anti-corrosion effect, after potting and before the colloid cures, install the protection component on the special-shaped part. At this time, the protection component is inserted into the epoxy resin colloid in the metering fixed box, forming a sealed space, which has a good protective effect on the temperature and pressure sensors;

[0022] 2. During installation, the operator installs the main body part into the metering fixed box through the opening of the metering fixed box, sleeved the intermediate connecting piece at the connection between the special-shaped part and the main body part until the intermediate connecting piece is snap-connected to the metering fixed box, and the main body part is difficult to move, completing the fixation of the special-shaped circuit board. The operator pours epoxy resin into the potting cavity until the epoxy resin fills the potting cavity but does not cover the special-shaped part. While the colloid has not solidified, the operator passes the protection box through the opening over the special-shaped part and then inserts it into the epoxy resin colloid in the metering fixed box to form a sealed space;

[0023] 3. When the installation of the main body part is completed, the special-shaped part is located between the two clamping plates. The operator sleeved the square connecting ring on the special-shaped part from the end far away from the main body part, and the four connecting feet are respectively located on both sides in the thickness direction of the main body part. When the square connecting ring is about to reach the connection between the special-shaped part and the main body part, the hook body abuts against the clamping plate, and the hook body and the connecting feet undergo elastic deformation until the hook body and the clamping plate are mutually clamped and fixed, realizing the positioning and fixation of the main body part and the special-shaped part. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of an NB remote ultrasonic gas meter according to an embodiment of the present application.

[0025] Figure 2 is a schematic structural diagram of a special-shaped circuit board according to an embodiment of the present application.

[0026] Figure 3 is a schematic structural diagram of a protection component according to an embodiment of the present application.

[0027] Figure 4 is a schematic structural diagram of an intermediate connecting piece and a protection box according to an embodiment of the present application.

[0028] Figure 5 is a schematic structural diagram of an intermediate connecting piece and a clamping plate according to an embodiment of the present application.

[0029] Figure 6 is an installation schematic diagram of an intermediate connecting piece, a protection box and a clamping plate according to an embodiment of the present application.

[0030] Figure 7 is a schematic structural diagram of the inside of a protection box according to an embodiment of the present application.

[0031] Description of reference numerals: 1. Inner substrate of gas meter; 2. Metering fixing box; 21. Card board; 22. Second pressing block; 23. Third pressing block; 24. Second slope block; 25. Clamping strip; 3. Special-shaped circuit board; 31. Main body part; 32. Special-shaped part; 4. Protection component; 41. Intermediate connecting piece; 411. Square connecting ring; 412. Connecting foot; 413. Hook body; 42. Protection box; 421. Circular hole; 422. First pressing block; 423. First slope block. Detailed implementation manners

[0032] The following further describes the present application in conjunction with the attached Figures 1-7 drawings for a more detailed description.

[0033] An embodiment of the present application discloses an NB remote transmission ultrasonic gas meter. Referring to Figure 1 and Figure 2 , an NB remote transmission ultrasonic gas meter includes an inner substrate 1 of the gas meter fixedly installed inside the gas meter, a metering fixing box 2 is buckled and installed on the inner substrate 1 of the gas meter, and the metering fixing box 2 is located beside the ultrasonic flow channel. The metering module of the present application is a special-shaped circuit board 3, and two ultrasonic transducers are arranged in the ultrasonic flow channel, and both ultrasonic transducers are connected to the special-shaped circuit board 3. The special-shaped circuit board 3 includes a main body part 31 and a special-shaped part 32, and a temperature and pressure sensor is arranged on the special-shaped part 32. One end of the metering fixing box 2 is open, the main body part 31 is arranged in the metering fixing box 2, and the special-shaped part 32 protrudes from the opening of the metering fixing box 2. A protection component 4 is arranged at the opening of the metering fixing box 2, the special-shaped part 32 is arranged inside the protection component 4, and the protection component 4 is movably installed at the opening of the metering fixing box 2.

[0034] The temperature and pressure sensor is designed on the special-shaped part 32 and will not be covered by the colloid during potting. In order to protect the temperature and pressure sensors and achieve an anti-corrosion effect, before the colloid is cured after potting, the protection component 4 is installed on the special-shaped part 32. At this time, the protection component 4 is inserted into the epoxy resin colloid inside the metering fixing box 2 to form a sealed space, which has a good protection effect on the temperature and pressure sensors.

[0035] Referring to Figure 3 and Figure 4, the protection component 4 includes an intermediate connecting piece 41 and a protection box 42. The intermediate connecting piece 41 is clamped at the connection between the special-shaped part 32 and the main body part 31, and the intermediate connecting piece 41 is snap-connected to the metering fixing box 2. A potting cavity is formed between the surface of the main body part 31, the outer surface of the intermediate connecting piece 41 and the inner wall of the metering fixing box 2, and epoxy resin is potted in the potting cavity. One end of the protection box 42 is open, the protection box 42 is sleeved on the special-shaped part 32, and the opening of the protection box 42 is inserted into the epoxy resin between the outer surface of the intermediate connecting piece 41 and the inner wall of the metering fixing box 2. A circular hole 421 is opened on the side wall of the protection box 42, and a hydrophobic film is covered on the circular hole 421.

[0036] During installation, the operator installs the main body part 31 into the metering fixing box 2 through the opening of the metering fixing box 2, sleeving the intermediate connecting piece 41 at the connection between the special-shaped part 32 and the main body part 31 until the intermediate connecting piece 41 is snap-connected to the metering fixing box 2, making the main body part 31 difficult to move, thus completing the fixation of the special-shaped circuit board. The operator pours epoxy resin into the potting cavity until the potting cavity is filled with epoxy resin but does not cover the special-shaped part 32. While the colloid has not solidified, the operator passes the protection box 42 through the opening over the special-shaped part 32 and then inserts it into the epoxy resin in the metering fixing box 2 to form a sealed space. The hydrophobic film has the effect of preventing water but not gas. The gas of the fuel gas passes through the circular hole 421 to contact the temperature and pressure sensor, and the water vapor is isolated outside by the hydrophobic film, reducing the possibility of corrosion and improving the protection effect.

[0037] Refer to Figure 3 and Figure 4 , a second pressing block 22 is installed on the side wall of the metering fixing box 2 far from the opening, a third pressing block 23 is installed on one side wall of the metering fixing box 2, and a second slope block 24 is installed on the side wall opposite to the third pressing block 23. Two groups of clamping strips 25 are also installed on the inner wall of the metering fixing box 2. The two groups of clamping strips 25 are arranged oppositely, and the two groups of clamping strips 25 are respectively located on both sides in the thickness direction of the main body part 31, and the two groups of clamping strips 25 are arranged in a staggered manner. The clamping strips 25 are located at the corners far from the opening of the metering fixing box 2 to avoid collision damage to the electronic components on the circuit board.

[0038] When the operator inserts the main body part 31 into the box body through the opening of the metering fixing box 2, the second slope block 24 can guide the main body part 31 to move towards the third pressing block 23 until the side wall of the main body part 31 abuts against the side walls of the second pressing block 22 and the third pressing block 23. At this time, the side walls of the two groups of clamping strips 25 respectively abut against the side walls of the main body part 31 in the thickness direction, jointly realizing the functions of positioning and fixing the main body part 31.

[0039] Refer to Figure 5 and Figure 6, the intermediate connecting member 41 includes a square connecting ring 411 and four connecting feet 412. The four connecting feet 412 are arranged at the four corners of the square connecting ring 411. The square connecting ring 411 is sleeved at the connection between the special-shaped part 32 and the main body part 31. The four connecting feet 412 are respectively located on both sides in the thickness direction of the main body part 31. There is a gap between the square connecting ring 411 and the metering fixing box 2. One end of the connecting foot 412 away from the square connecting ring 411 is provided as a hook body 413.

[0040] A clamping plate 21 is installed on the inner wall of the metering fixing box 2 near the opening. The cross-section of the clamping plate 21 is a right triangle, and the hook body 413 cooperates with the clamping plate 21. The length of the clamping plate 21 is greater than the length of the connecting ring, that is, the distance between the mutually remote side walls of the two connecting feet 412 on the same side, which improves the tolerance.

[0041] After the main body part 31 is installed, the special-shaped part 32 is located between the two clamping plates 21. The operator sleeves the square connecting ring 411 from one end away from the main body part 31 onto the special-shaped part 32, and the four connecting feet 412 are respectively located on both sides in the thickness direction of the main body part 31. When the square connecting ring 411 is about to reach the connection between the special-shaped part 32 and the main body part 31, the hook body 413 abuts against the clamping plate 21, and the hook body 413 and the connecting foot 412 undergo elastic deformation until the hook body 413 and the clamping plate 21 are clamped and fixed to each other, realizing the positioning and fixing of the main body part 31 and the special-shaped part 32.

[0042] Refer to Figure 7 , a first abutting block 422 is provided on the inner wall of the protection box 42 far away from the opening, and two opposite first slope blocks 423 are arranged in the protection box 42.

[0043] After the intermediate connecting member 41 is installed, the operator performs glue filling and ensures that the glue does not exceed the end wall of the square connecting ring 411 away from the connecting feet 412. At this time, the operator holds the protection box 42, makes the protection box 42 pass through the special-shaped part 32 through the opening, and finely adjusts the position of the protection box 42 through the two first slope blocks 423 until the side wall of the first abutting block 422 abuts against the side wall of the special-shaped part 32. At this time, the side plate of the protection box 42 is inserted into the epoxy resin colloid between the inner wall of the metering fixing box 2 and the square connecting ring 411 to form a sealed space. Wait for the epoxy resin colloid to solidify and then complete all installation steps.

[0044] The implementation principle of an NB remote ultrasonic gas meter in an embodiment of the present application is as follows: When an operator inserts the main body part 31 into the box body through the opening of the metering fixing box 2, the second slope block 24 can guide the main body part 31 to move towards the third abutting block 23 until the side wall of the main body part 31 abuts against the side walls of the second abutting block 22 and the third abutting block 23. At this time, the side walls of the two groups of clamping strips 25 respectively abut against the side walls of the main body part 31 in the thickness direction, jointly realizing the functions of positioning and fixing the main body part 31. At this time, the special-shaped part 32 is located between the two clamping plates 21. The operator sleeves the square connecting ring 411 from one end far away from the main body part 31 onto the special-shaped part 32, and the four connecting feet 412 are respectively located on both sides of the main body part 31 in the thickness direction. When the square connecting ring 411 is about to reach the connection part of the special-shaped part 32 and the main body part 31, the hook body 413 abuts against the clamping plate 21, and the hook body 413 and the connecting feet 412 undergo elastic deformation until the hook body 413 and the clamping plate 21 are mutually clamped and fixed, realizing the positioning and fixing of the main body part 31 and the special-shaped part 32. The operator performs glue filling and ensures that the glue does not exceed the end wall of the square connecting ring 411 far away from the connecting feet 412. At this time, the operator holds the protection box 42, makes the protection box 42 pass through the special-shaped part 32 through the opening, and finely adjusts the position of the protection box 42 through the two first slope blocks 423 until the side wall of the first abutting block 422 abuts against the side wall of the special-shaped part 32. At this time, the side plate of the protection box 42 is inserted into the epoxy resin glue body between the inner wall of the metering fixing box 2 and the square connecting ring 411 to form a sealed space. After the epoxy resin colloid solidifies, all installation steps are completed.

[0045] The above are all the preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A NB remote ultrasonic gas meter, characterized in that: The invention comprises a gas meter inner substrate (1), a metering fixed box (2), a special-shaped circuit board (3) and a protection component (4), wherein the gas meter inner substrate (1) is arranged inside the gas meter, the metering fixed box (2) is mounted on the gas meter inner substrate (1) and is located beside an ultrasonic flow channel, two ultrasonic transducers are arranged in the ultrasonic flow channel, and both ultrasonic transducers are connected to the special-shaped circuit board (3); the special-shaped circuit board (3) comprises a main body (31) and a special-shaped part (32), and a temperature and pressure sensor is arranged on the special-shaped part (32); one end of the metering fixed box (2) is open, the main body (31) is arranged in the metering fixed box (2), the special-shaped part (32) protrudes from the opening of the metering fixed box (2), the special-shaped part (32) is arranged in the protection component (4), and the protection component (4) is movably mounted at the opening of the metering fixed box (2).

2. The NB remote ultrasonic gas meter according to claim 1, characterized in that: The protection component (4) comprises an intermediate connecting piece (41) and a protection box (42); the intermediate connecting piece (41) is clamped at the connection between the special-shaped part (32) and the main body (31); the intermediate connecting piece (41) is snap-connected to the metering fixed box (2); a glue-filling cavity is formed between the surface of the main body (31), the outer surface of the intermediate connecting piece (41) and the inner wall of the metering fixed box (2); epoxy resin is poured into the glue-filling cavity; one end of the protection box (42) is open; the protection box (42) is sleeved on the special-shaped part (32); the opening of the protection box (42) is inserted into the epoxy resin colloid between the outer surface of the intermediate connecting piece (41) and the inner wall of the metering fixed box (2).

3. The NB remote ultrasonic gas meter according to claim 2 is characterized in that: A circular hole (421) is provided on the side wall of the protection box (42), and the circular hole (421) is covered with a hydrophobic film.

4. The NB remote ultrasonic gas meter according to claim 2 is characterized in that: A first abutting block (422) is arranged on the inner wall of the protection box (42) away from the opening; and two opposite first slope blocks (423) are arranged inside the protection box (42).

5. The NB remote ultrasonic gas meter according to claim 2 is characterized in that: The intermediate connecting member (41) comprises a square connecting ring (411) and four connecting feet (412), wherein the four connecting feet (412) are arranged at the four corners of the square connecting ring (411), the square connecting ring (411) is sleeved at the connection between the special-shaped part (32) and the main part (31), and the four connecting feet (412) are respectively located on both sides of the main part (31) in the thickness direction; there is a gap between the square connecting ring (411) and the metering fixed box (2), and one end of the connecting foot (412) away from the square connecting ring (411) is arranged as a hook body (413).

6. The NB remote ultrasonic gas meter according to claim 5, characterized in that: A clamping plate (21) is installed on the inner wall of the metering fixed box (2) near the opening, and the cross-section of the clamping plate (21) is a right triangle. The hook body (413) cooperates with the clamping plate (21); the length of the clamping plate (21) is greater than the length of the connecting ring, that is, the distance between the side walls of the two connecting feet (412) located on the same side that are away from each other.

7. The NB remote ultrasonic gas meter according to claim 1 is characterized in that: A second abutment block (22) is installed on the side wall of the metering fixed box (2) away from the opening, a third abutment block (23) is installed on the side wall on one side of the metering fixed box (2), and a second slope block (24) is installed on the side wall opposite to the third abutment block (23).

8. The NB remote ultrasonic gas meter according to claim 7, characterized in that: Two groups of clamping strips (25) are installed on the inner wall of the metering fixed box (2), the two groups of clamping strips (25) are arranged opposite to each other, the two groups of clamping strips (25) are respectively located on both sides of the main body (31) in the thickness direction, and the two groups of clamping strips (25) are staggered; the clamping strips (25) are located at a corner away from the opening of the metering fixed box (2).

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