Runner structure suitable for various measuring ranges

Abstract

The utility model relates to a flow channel structure suitable for various measuring ranges, which is characterized in that a rectification structure and a flow channel are integrally molded, and the flow channel is suitable for various measuring ranges by embedding an insertion sheet, so that the mold opening times can be effectively reduced, the production cost is reduced, the production efficiency is improved, the flexibility and the adaptability of the flow channel design are enhanced, and different flow requirements are met. According to the utility model, the buckle structure is provided with the transducer, so that the invalid sound path distance of the flow channel can be reduced, and the measurement accuracy is improved. The center of the transducer is fixed in the middle, so that the center of the transducer is not shielded, flowing gas is measured by the strongest ultrasonic wave band, and the ultrasonic wave measurement effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid measurement, flow channel design and mechanical engineering, and in particular relates to a flow channel structure suitable for multiple measuring ranges. Background Art

[0002] In the field of fluid measurement technology, the design of flow channels is an important link. The design of flow channels directly affects the flow state of the fluid, thereby affecting the accuracy of measurement. At the same time, the design of flow channels also involves the field of mechanical engineering, because the design of flow channels needs to take into account the coordination and installation of various mechanical structures. In addition, in order to meet different flow requirements, it is often necessary to design multiple flow channels with different ranges, which in turn involves the flexibility and adaptability of flow channel design.

[0003] In the existing technology, a common solution is to design multiple flow channels with different ranges, and each flow channel with different ranges requires a set of molds to produce. Although this can meet different flow requirements, it will lead to an increase in production costs and is not conducive to improving production efficiency. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a technical solution of a flow channel structure suitable for various measuring ranges.

[0005] The flow channel structure suitable for multiple ranges is characterized in that: the flow channel is integrally injection molded, the rectifying structure in the flow channel is integrally molded with the flow channel body, one side of the flow channel is the flow channel air inlet, the other side of the flow channel is the flow channel air outlet, and the flow channel air inlet is set as a bell mouth; the rectifying structure divides the flow channel into a left area, a middle area and a right area, plugs can be inserted into the left area and the right area, and the range of the flow channel can be changed by inserting one plug or two plugs.

[0006] The flow channel structure suitable for multiple measuring ranges is characterized in that the interior of the flow channel is subjected to a draft treatment so that the cross-sectional area of ​​the flow channel air inlet formed inside the flow channel is larger than the cross-sectional area of ​​the flow channel air outlet.

[0007] The flow channel structure suitable for multiple measuring ranges is characterized in that the rectification structure has a draft angle of 0.15 degrees from the flow channel air inlet to the flow channel air outlet, and the rectification structure at the flow channel air inlet is set as a rounded corner.

[0008] The flow channel structure suitable for multiple measuring ranges is characterized in that the insert includes an insert rectifying structure fitting surface, an insert groove, an air outlet fitting surface and a bell-mouth fitting surface. The insert is fitted with the rounded end face of the rectifying structure through the insert groove, the insert rectifying structure fitting surface is fitted with the inner wall of the rectifying structure, the bell-mouth fitting surface is fitted with the curved surface of the bell-mouth perpendicular to the upper end face of the flow channel, and the air outlet fitting surface is parallel to the terminal face of the rectifying structure at the flow channel air outlet.

[0009] The flow channel structure suitable for multiple measuring ranges is characterized in that a 0.1mm interference is left between the fitting surface of the plug rectifying structure of the plug and the rectifying structure, a 0.1mm interference is left between the fitting surface of the air outlet and the air outlet of the flow channel, and a 0.1mm interference is left between the fitting surface of the bell mouth and the bell mouth.

[0010] The flow channel structure suitable for multiple ranges is characterized in that a group of reflective transducer fixing seats are arranged on the upper end surface of the flow channel, and the transducer is fixed on the transducer fixing seat by a snap; the snap fastening device of the snap and the transducer fixing seat boss of the transducer fixing seat position the transducer.

[0011] The flow channel structure suitable for multiple measuring ranges is characterized in that a buckle chamfer is provided on the buckle, so that a group of reflection transducer fixing seats on the upper end surface of the flow channel are increased from 55 degrees to 70 degrees for reflection.

[0012] The flow channel structure suitable for multiple measuring ranges is characterized in that a transducer rubber sealing ring is arranged between the transducer and the transducer fixing seat.

[0013] The flow channel structure suitable for multiple ranges is characterized in that the end face of the transducer contacts the buckle fastening device of the buckle and cooperates with the transducer fixing seat boss of the transducer fixing seat to limit the transducer, and then the buckle boss on the buckle is pressed against the upper end face of the transducer on the transducer fixing seat to limit the position.

[0014] The flow channel structure suitable for multiple measuring ranges is characterized in that an air outlet pipe connection is provided at the air outlet of the flow channel, the air outlet of the flow channel is connected to the air outlet connecting pipe by a flange connection, and is assembled with the air outlet connecting pipe by screw fastening.

[0015] The flow channel of the utility model adopts an integrated molding design. The original flow channel is a G4 flow channel model. By embedding one insert, the flow channel can be adapted to the G2.5 range, and by embedding two inserts, the flow channel can be adapted to the G1.6 range. The rectifier structure has a draft angle of 0.15° from the air inlet to the air outlet, and a fillet is provided at the rectifier sheet at the air inlet of the flow channel. These two structural designs correspond to the inserts one by one, so that the inserts can form an interference fit with the flow channel without any buckle design. And the center of the transducer is always kept in the middle layer of the flow channel, ensuring that the center of the transducer is not blocked, thereby ensuring that the strongest ultrasonic wave band can measure the gas flowing through, and improving the accuracy of the measurement. In addition, innovative improvements have been made on the basis of the original buckle CN202322061459.X patent design. First, the original rotating buckle is changed to a clamping buckle, and secondly, a triangle with a height of 2.4mm and an angle of 30° is cut on both sides of the buckle, so that the buckle can reduce the invalid sound range while ensuring the fastening force.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1) The utility model adopts a multi-range insert flow channel, which avoids designing a set of molds for each range of flow channels, greatly reducing the number of mold openings, thereby reducing production costs and improving production efficiency;

[0018] 2) The transducer of the utility model is fixed in the middle, ensuring that the center of the transducer is not blocked, thereby ensuring that the strongest ultrasonic wave band can measure the gas flowing through, thereby improving the accuracy of the measurement;

[0019] 3) The utility model adopts a new buckle to install the transducer, which has better fastening force and reduces the invalid sound path of the flow channel, further improving the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the flow channel structure of the utility model;

[0021] Figure 2 A schematic diagram of inserting an insert into the flow channel structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the flow channel for the three measuring ranges of G4 / G2.5 / G1.6 of the utility model;

[0023] Figure 4 This is a schematic diagram of the buckle installation of the utility model;

[0024] Figure 5 The schematic diagram of the three states of the buckle of the utility model is as follows

[0025] Figure 6 This is the working principle diagram of the flow channel of the utility model;

[0026] Figure 7 for Figure 6 A partial enlarged view of

[0027] Figure 8 This is a schematic diagram of the structure of the plug of the utility model Figure 1 ;

[0028] Fig. 9 This is a schematic diagram of the structure of the plug of the utility model Figure 2 ;

[0029] Fig.10 This is the G1.6 range flow channel section of the utility model Figure 1 ;

[0030] Fig.11 This is the G1.6 range flow channel section of the utility model Figure 2 ;

[0031] In the figure: 1-flow channel, 2-flow channel air inlet, 3-rectification structure, 4-bell mouth, 5-exhaust pipe connection, 6-flange, 7-flow channel air outlet, 8-buckle, 9-transducer, 10-insert, 11-transducer fixing seat, 12-flow channel upper end surface, 13-transducer fixing seat boss, 14-buckle bevel surface, 15-buckle boss, 16-buckle fastening device, 17-transducer channel 1, 18-transducer channel 2, 19-transducer rubber sealing ring, 20-insert rectification structure fitting surface, 21-insert groove, 22-air outlet fitting surface, 23-bell mouth fitting surface. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings:

[0033] A flow channel structure suitable for multiple ranges, the flow channel 1 is integrally injection molded, the rectifying structure 3 in the flow channel is integrally molded with the flow channel 1 body, the gas flows in from the flow channel air inlet 2, is rectified by the rectifying structure 3, and then is evenly diffused in the flow channel shell; in order to increase the rectifying effect, a bell mouth 4 is provided at the flow channel air inlet 2; the rectifying structure 3 divides the flow channel 1 into a left area, a middle area and a right area, and plug-ins 10 can be inserted into the left area and the right area, and the range of the flow channel can be changed by inserting one or two plug-ins.

[0034] A set of reflective transducer fixing seats 11 are arranged at the upper end face 12 of the flow channel of the utility model, and the transducer 9 is fixedly mounted on the transducer fixing seat 11 by means of a buckle 8; in order to make the flow channel 1 more stably installed, an air outlet pipe connection 5 and a flange 6 are arranged at the air outlet 7 of the flow channel; in order to change the range of the flow channel 1, an insert 10 can be arranged at the air inlet 2 of the flow channel, and the original G4 range can be changed to G2.5 range by setting one insert 10, and the original G4 range can be changed to G1.6 range by setting two inserts 10; the insert 10 fits with the rounded end face of the rectifier structure 3 through the insert groove 21, and the insert is rectified The flow structure fitting surface 20 fits with the inner wall of the rectification structure 3, the bell mouth fitting surface 23 fits with the bell mouth 4 perpendicular to the curved surface of the upper end surface 12 of the flow channel, and the air outlet fitting surface 22 is parallel to the terminal surface of the rectification structure 3 at the flow channel outlet 7; the internal structure of the flow channel 1 is subjected to a draft treatment, so that the cross-sectional area of ​​the flow channel air inlet 2 formed by the internal structure of the flow channel 1 is slightly larger than the cross-sectional area at the flow channel outlet 7, so the insert 10 can be fixed inside the flow channel 1 without any screws, adhesives, snaps, etc., and the gas flows from the flow channel air inlet 2 to the flow channel outlet 7, which can ensure that the impact of the gas on the installation of the insert 10 is minimized.

[0035] The utility model positions the transducer 9 through the buckle fastening device 16 of the buckle 8 and the transducer fixing seat boss 13 of the transducer fixing seat 11; in order to reduce the invalid sound path, a buckle bevel 14 is added to the existing buckle 8, which can increase a group of reflection transducer fixing seat 11 on the upper end face 12 of the flow channel from 55 degrees to 70 degrees for reflection. The large-angle reflection will cause the original buckle structure to interfere with the upper end face 12 of the flow channel, so the buckle bevel 14 is added to the buckle 8, thereby reducing the invalid sound path; a transducer rubber sealing ring 19 is arranged between the transducer 9 and the transducer fixing seat 11, and the buckle fastening device 16 of the buckle 8 cooperates with the transducer fixing seat boss 13 of the transducer fixing seat 11 to limit the transducer, and then the buckle boss 15 on the buckle 8 is pressed against the upper end face of the transducer 9 on the transducer fixing seat 11 to limit the position.

[0036] The flow channel 1 of the utility model is formed by integral injection molding, and an air outlet pipe connection 5 is provided at the flow channel air outlet 7. The flow channel air outlet 7 is connected to the air outlet connecting pipe by a flange 6, and is assembled with the air outlet connecting pipe by screw fastening. Compared with the current retaining spring, adhesive, buckle and other methods, it has stronger reliability and stability.

[0037] The flow channel measurement of the utility model is realized by the transducers of transducer channel one 17 and transducer channel two 18. The ultrasonic wave is emitted from the transducer at transducer channel one 17, passes through the flow channel 1, and is reflected at the inner wall of the flow channel 1 to the transducer at transducer channel two 18. The ultrasonic wave is then sent by the transducer at transducer channel two 18 and reflected back to the transducer at transducer channel one 17. The time difference between the downstream and upstream flow can be used to measure the flow velocity of the fluid in the flow field, and then the instantaneous flow through the flow channel 1 can be obtained to realize the flow measurement.

[0038] The insert 10 of the flow channel of the utility model has a 0.1mm interference between the insert rectifying structure fitting surface 20 and the rectifying structure 3, and the outlet fitting surface 22 and the flow channel outlet 7 and the bell mouth fitting surface 23 and the bell mouth 4 are consistent with them. This design can ensure that no airflow will pass between the insert 10 and the flow channel fitting surface, and the insert 10 has blocked the transducer 9 reflection channel, and it is impossible to reflect the ultrasonic wave from the transducer channel 1 17 to the transducer channel 2 18 in the closed channel, and the ultrasonic wave can only be reflected in the channel without the insert to calculate the flow. This design further guarantees the feasibility of the insert 10 changing the range of the flow channel 1.

[0039] The utility model can change the flow channel range by setting a plug 10 at the flow channel air inlet 2. Setting one plug 10 can change the original G4 range to G2.5 range, and setting two plugs 10 can change the original G4 range to G1.6 range; there is an interference of 0.1mm between the plug rectifying structure fitting surface 20 of the plug 10 and the rectifying structure 3, and the outlet fitting surface 22 and the flow channel outlet 7 and the bell mouth fitting surface 23 and the bell mouth 4 are consistent with each other. This design can generate a large static friction force between the two through the friction coefficient of the ABS injection molding material itself, so that the plug 10 will not be displaced without being strongly damaged. The insert 10 is fitted with the rounded end face of the rectification structure 3 through the insert groove 21, the insert rectification structure fitting surface 20 is fitted with the inner wall of the rectification structure 3, the bell mouth fitting surface 23 is fitted with the bell mouth 4 perpendicular to the curved surface of the upper end face 12 of the flow channel, and the outlet fitting surface 22 is parallel to the terminal face of the rectification structure 3 at the flow channel outlet 7; the internal structure of the flow channel 1 is subjected to the drafting process, so that the cross-sectional area of ​​the flow channel inlet 2 formed by the internal structure of the flow channel 1 is slightly larger than the cross-sectional area at the flow channel outlet 7 Therefore, the insert 10 can be fixed inside the flow channel 1 without any screws, adhesives, buckles, etc., and the gas flows from the flow channel air inlet 2 to the flow channel air outlet 7, which will produce a pressure effect on the flow channel 10 from the flow channel air inlet 2 to the flow channel air outlet 7, which can ensure that the flow of gas has a confinement effect on the insert 10; this design avoids designing a set of molds for each flow channel of each range, greatly reducing the number of mold openings, thereby reducing production costs and improving production efficiency. It also ensures that the center of the transducer is not blocked, thereby ensuring that the strongest ultrasonic band can measure the gas flowing through, improving the accuracy of the measurement.

[0040] The working principle of the utility model: when the ultrasonic gas meter is working, the gas enters the rectifying structure of the flow channel through the gas meter air inlet and forms a stable flow field; the transducer installed on the transducer fixing seat by pressing the buckle up and down emits ultrasonic waves, and the average flow velocity of the fluid in the flow field is measured by the time difference between the upstream and downstream, and then the instantaneous flow through the flow channel is obtained to complete the flow measurement. The plug of the utility model makes it more convenient to change the range of the flow channel. There is no need to design a set of molds for each range of the flow channel, which greatly reduces the number of mold openings, thereby reducing production costs and improving production efficiency. And when changing the range, it ensures that the center of the transducer is not blocked, thereby ensuring that the strongest ultrasonic wave band can measure the gas flowing through, improving the accuracy of the measurement.

[0041] The specific examples described in this utility model are merely examples of the spirit of this utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific examples described or replace them in similar ways, but they will not deviate from the spirit of this utility model or exceed the scope defined by the attached claims.

[0042] Although the present invention uses more terms such as ultrasonic gas meter, flow channel, gas meter air inlet, gas meter air outlet, transducer fixing seat, buckle, rectifier structure, transducer, insert, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention. It is contrary to the spirit of the present invention to interpret them as any additional restrictions.

[0043] The utility model relates to a flow channel structure suitable for a variety of measurement ranges. The flow channel is an integral one-piece molding. By embedding a plug-in sheet, the flow channel is suitable for a variety of measurement ranges, which can effectively reduce the number of mold openings, reduce production costs, improve production efficiency, enhance the flexibility and adaptability of the flow channel design, and meet different flow requirements. The utility model adopts a new buckle to install the transducer, which can reduce the ineffective sound path of the flow channel and improve the accuracy of the measurement. The utility model adopts a transducer center fixed in the middle layer to ensure that the transducer center is not blocked, and the strongest ultrasonic band is used to measure the gas flowing through, thereby improving the ultrasonic measurement effect.

Claims

1. A flow channel structure suitable for multiple measuring ranges, characterized in that: The flow channel is integrally injection molded, and the rectifying structure in the flow channel is integrally molded with the flow channel body. One side of the flow channel is the flow channel air inlet, and the other side of the flow channel is the flow channel air outlet. The flow channel air inlet is arranged as a bell mouth; the rectifying structure divides the flow channel into a left area, a middle area and a right area, and plugs can be inserted into the left area and the right area. The range of the flow channel can be changed by inserting one plug or two plugs.

2. A flow channel structure suitable for multiple ranges according to claim 1, characterized in that The interior of the flow channel is subjected to a drafting process so that the cross-sectional area of ​​the flow channel air inlet formed inside the flow channel is larger than the cross-sectional area of ​​the flow channel air outlet.

3. A flow channel structure suitable for multiple ranges according to claim 1, characterized in that The rectification structure is provided with a draft angle of 0.15 degrees from the air inlet of the runner to the air outlet of the runner, and the rectification structure at the air inlet of the runner is provided with a rounded corner.

4. A flow channel structure suitable for multiple ranges according to claim 1, characterized in that The insert includes an insert rectification structure fitting surface, an insert groove, an air outlet fitting surface and a bell mouth fitting surface. The insert is fitted with the rounded end surface of the rectification structure through the insert groove, the insert rectification structure fitting surface is fitted with the inner wall of the rectification structure, the bell mouth fitting surface is fitted with the curved surface of the bell mouth perpendicular to the upper end surface of the flow channel, and the air outlet fitting surface is parallel to the terminal surface of the rectification structure at the flow channel air outlet.

5. A flow channel structure suitable for multiple ranges according to claim 4, characterized in that There is an interference of 0.1mm between the fitting surface of the plug rectifying structure of the plug and the rectifying structure, there is an interference of 0.1mm between the fitting surface of the air outlet and the air outlet of the flow channel, and there is an interference of 0.1mm between the fitting surface of the bell mouth and the bell mouth.

6. A flow channel structure suitable for multiple ranges according to claim 1, characterized in that A set of reflective transducer fixing seats is arranged on the upper end surface of the flow channel, and the transducer is fixedly mounted on the transducer fixing seat by means of buckles; the buckle fastening device of the buckle and the transducer fixing seat boss of the transducer fixing seat position the transducer.

7. A flow channel structure suitable for multiple measuring ranges according to claim 6, characterized in that The buckle is provided with a buckle bevel surface, so that a group of reflection transducer fixing seats on the upper end surface of the flow channel are increased from 55 degrees to 70 degrees for reflection.

8. A flow channel structure suitable for multiple measuring ranges according to claim 6, characterized in that A transducer rubber sealing ring is arranged between the transducer and the transducer fixing seat.

9. A flow channel structure suitable for multiple measuring ranges according to claim 6, characterized in that The end face of the transducer contacts the buckle fastening device of the buckle and cooperates with the transducer fixing seat boss of the transducer fixing seat to limit the transducer, and then the buckle boss on the buckle is pressed against the upper end face of the transducer on the transducer fixing seat to limit the position.

10. A flow channel structure suitable for multiple measuring ranges according to claim 1, characterized in that An air outlet pipe connection is provided at the air outlet of the flow channel, and the air outlet of the flow channel is connected to the air outlet connecting pipe by a flange connection method, and is assembled with the air outlet connecting pipe by fastening with screws.

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