A method for assembling a high-precision turbine flow meter for gas.

Abstract

This invention relates to the field of flow meter technology, and in particular to an assembly method for a high-precision turbine flow meter for gas. Several steps of this method clearly disclose the assembly process for the high-precision turbine flow meter, minimizing problems such as confusing steps, inaccurate installation, misalignment, and interference during installation. It provides clear, reliable, and effective guidance for assembly workers, addressing common errors, inaccuracies, misalignment, and interference during the assembly of high-precision turbine flow meters. This method aims to improve the first-pass yield of the high-precision turbine flow meter for gas, as well as its reliability, measurement accuracy, and stability after assembly.

Description

Technical Field

[0001] This invention relates to the field of flow meter technology, and in particular to an assembly method for a high-precision turbine flow meter for gas. Background Technology

[0002] Gas turbine flow meters are velocity-type instruments with advantages such as high accuracy and repeatability. Their simple overall structure and wide range make them widely used in long-distance gas transmission pipelines, primarily for metering in pipeline networks. In urban gas transmission networks, they are mainly used in high-flow-rate main pipelines such as pressure regulating stations, requiring long-term operation. Therefore, the normal output of the metering signal is particularly important. For example, the gas turbine flow meter with dual high-frequency detection disclosed in application number CN201720578037.1, the gas turbine flow meter disclosed in application number CN201620578919.3, the turbine flow meter counting transmission component disclosed in application number CN202222289316.X, and the novel rectification structure and metering chamber component disclosed in application number CN202022670904.9 all disclose some structures of existing turbine flow meters.

[0003] However, high-precision turbine flow meters have many components, a complex structure, and require precise installation between components, which generally necessitates manual assembly. Manual installation is prone to problems such as disorganized steps, inaccurate installation, misalignment, and interference. Furthermore, existing technologies lack methods to guide workers during installation. Therefore, high-precision turbine flow meters are susceptible to errors and inaccuracies during assembly, resulting in low reliability, low metering accuracy, low stability, and a low overall pass rate after assembly.

[0004] Based on this, the applicant is considering designing an assembly method to maximize the reliability, metering accuracy, and stability of a high-precision turbine flow meter for gas. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide an assembly method that can improve the reliability, metering accuracy and stability of a high-precision turbine flow meter for gas as much as possible.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A method for assembling a high-precision turbine flow meter for gas includes the following steps:

[0008] S1. Preliminary work;

[0009] S2, Measurement core assembly;

[0010] S3. Measurement core installation;

[0011] S4, Turbo Assembly:

[0012] S5, Fluid Guide Assembly:

[0013] S6. Test the rotation time of the movement assembly:

[0014] S7. Assembly of movement components and housing:

[0015] S8. Install pressure test connector and temperature test plug;

[0016] S9. Install magnetic coupler assembly:

[0017] S10, Install the counter base assembly;

[0018] S11. Installation of counter base and counter support plate:

[0019] S12, pressure resistance and airtightness test;

[0020] S13, Install the counter group;

[0021] S14. Install aviation connector;

[0022] S15, Install standard gears:

[0023] S16. Install the adjusting wheel shaft;

[0024] S17, Fixed Counter Group:

[0025] S18, Install the counter.

[0026] Furthermore,

[0027] S1, Preliminary work: Check the entire measuring core, ensuring the gear transmission is flexible; check the quality of the parts, use fine sandpaper to remove burrs from all parts, clean the surface and inner holes of all parts, and blow the surface and inner holes of the parts with compressed air.

[0028] S2. Measuring core assembly: S2.1. Apply anaerobic adhesive to the outer cylindrical surface of the measuring core journal and the bottom of the measuring core pin. Note that only apply a small amount of anaerobic adhesive to one side of the pin. Use a hand-operated press to press it into the corresponding shaft hole of the measuring core seat. At the same time, install the main drive shaft into the measuring core seat in the corresponding direction. S2.2. Place the measuring core seat vertically. Install the wave spring washer, bearing, and bearing retainer into the main drive shaft in sequence. Fix the bearing with the bearing retainer. Adjust the measuring core cover, tighten the screws, and check the spring clearance on the cover. S2.3. Install the flange bearing into the measuring core seat. The main drive shaft teeth pass through the flange bearing, intermediate wheel, and flange bearing in sequence. Finally, fix the flange bearing with the bearing retainer. Use two screws on the intermediate wheel. S2.4. Secure the bearing with the measuring core bolt, then install the connecting gear, then install the bearing again, and secure it with the bearing retainer. S2.5. The drive shaft teeth pass sequentially through the flange bearing, measuring core seat, flange bearing, and input gear. Finally, secure the flange bearing with the bearing retainer and secure the input gear with two screws. S2.6. Install the bearing with the measuring core bolt, then install the output gear, and secure the gear holder with screws. S2.7. Move the intermediate wheel to the center, allowing it to mesh with the center of the main drive shaft. Align it with the main drive shaft and make it perpendicular to the surface with the fixing screws. Check the position of each gear. The measuring core should rotate freely. Be careful not to overtighten the screws.

[0029] S3, Measurement Core Installation: Insert the entire measurement core into the measurement core housing assembly, ensuring that the output port of the entire measurement core is aligned with the output hole of the measurement core housing assembly. Secure the entire measurement core to the measurement core housing assembly using a cylindrical screw and a spring washer, and tighten the cylindrical screw.

[0030] Furthermore,

[0031] S4, Turbine Assembly: Adjust the gap between the measuring core assembly and the turbine assembly by selecting appropriate adjusting shims. Choose adjusting shims of different thicknesses according to different flow meter specifications. Place the adjusting shims onto the output shaft of the measuring core assembly, and then put on the turbine. Gently rotate the turbine to observe whether the turbine rotates flexibly. If not, reassemble. Push the locating pin into the pin groove between the turbine and the main drive shaft of the measuring core. The locating pin should not be higher than the plane of the turbine. Secure the turbine with two left-hand nuts, ensuring that both nuts are tightened.

[0032] S5, Fluid Guide Assembly: The measuring core assembly, turbine, fluid guide, and measuring core housing assembly form a single unit. Place the measuring core housing assembly vertically on the worktable. First, install the fluid guide ring into the measuring core housing assembly, and then place the fluid guide on the housing assembly. Note that there should be no friction between the fluid guide and the turbine surface. Fix the fluid guide assembly with cylindrical screws and spring washers, and tighten the cylindrical screws. Put O-rings on the grooves of the fluid guide and the measuring core housing. The O-rings must not fall off.

[0033] Furthermore,

[0034] S6, Test the rotation time of the mechanism assembly: Blow compressed air into the guide fluid position of the mechanism assembly until the turbine rotates at high speed, then stop blowing air and start timing with a stopwatch to record the rotation test time of the mechanism assembly; proceed to the next step only after the turbine rotation time meets the process requirements.

[0035] Furthermore,

[0036] S7, Assembly of the mechanism assembly and the housing: Place the housing horizontally on the worktable, apply grease to the sealing ring of the mechanism assembly and the assembly position of the housing and the sealing ring, use a push-in tool to horizontally insert the mechanism assembly into the hole of the housing, and make sure that the output hole on the top of the housing is aligned with the output hole of the measuring core housing assembly; screw the measuring core fixing screw into the output hole of the housing to fix the mechanism assembly, and make sure to apply a small amount of grease to the threads of the fixing screw; drive the limit pin into the pin hole on the top of the housing;

[0037] S8, install the pressure test connector and temperature test plug: apply grease to the temperature test plug and O-ring, apply thread sealant to the pressure test connector, and tighten the screws;

[0038] S9, Installing the magnetic coupler assembly: Insert two oil-lubricated bearings into the bearing holes of the lower magnetic coupler cover, and one grease-lubricated bearing into the bearing hole of the upper magnetic coupler cover. Place the upper and lower magnetic coupler covers onto the two shaft ends of the magnetic coupler partition. Place the drive shaft assembly into the output hole of the housing, ensuring the round end of the drive shaft assembly is at the top. Place the magnetic coupler assembly into the output hole of the housing, adjust the length of the drive shaft assembly, and remove the magnetic coupler assembly after proper adjustment. Tighten the nut on the drive shaft assembly or use a drive shaft assembly of appropriate fixed length. Place the O-ring into the output hole of the housing and apply a small amount of grease to the surface of the O-ring. Slowly place the magnetic coupler assembly into the output hole of the housing, ensuring the counter drive shaft passes through the output gear drive hole on the measuring core assembly.

[0039] Furthermore,

[0040] S10, Install the counter base assembly: Place the four corner nuts into the counter cover and screw them into the two holes; fit the O-ring into the O-groove of the counter cover and apply a small amount of grease to the surface of the O-ring and the cylinder above the outer shell;

[0041] S11, installation of the counter base and counter support plate: fit the counter base assembly into the cylindrical hole on the top of the housing, ensuring the counter base assembly can rotate freely; apply grease to the threaded hole on the top of the housing and the external thread of the counter support plate, apply a small amount of grease to the O-ring surface, screw the counter support plate into the threaded hole on the top of the housing and tighten it, simultaneously tighten the conical fixing screw, and check the rotation of the counter base assembly, cleaning the grease from the surface; after assembly, cover the counter base assembly with the counter cover to prevent dust from entering.

[0042] Furthermore,

[0043] S12, pressure resistance and airtightness test: The whole machine is placed in the sealing pressure resistance test device and tested according to the general inspection process of pressure resistance and airtightness of gas flow meter. After the pressure resistance and airtightness test is completed, the surface of the flow meter is purged and wiped to clean the surface. The counter is then covered on the counter base and sent to the test area for inspection.

[0044] Furthermore,

[0045] S13, Installing the counter assembly: Fix the reed switch plastic-encapsulated assembly onto the counter assembly;

[0046] S14, Installing the aviation plug: Fix the aviation plug onto the counter cover;

[0047] S15, Install standard gear: Rotate the drive wheel onto the external thread above the magnetic coupling assembly, and fix the adjusting gear with a nut;

[0048] S17, fixing the counter group: fixing the counter group to the counter base group with screws, so that a certain gap is maintained between the driving and driven wheels;

[0049] S18, Install the counter: Assemble the correct counter and secure it with screws.

[0050] Furthermore, it also includes the following steps:

[0051] S19. Performance testing: The test shall be conducted in accordance with the general inspection process for gas flow meter tabulation testing.

[0052] S20. Install the counter housing: Paste the corresponding surface paper onto the surface label, install the surface label onto the counter assembly, and simultaneously insert the O-ring into the groove on the outer circle of the counter base. Apply grease to the O-ring and the counter cover, and then cover the counter cover with screws. Secure the counter cover with screws, insert the lead seal thread into the small hole on the screw, insert the lead seal, and affix the lead seal.

[0053] Furthermore, it also includes the following steps:

[0054] S21. Post-processing: Check the paint on the outer surface of the flow meter for damage. If there is any damage, it needs to be repaired. Clean the outer surface of the flow meter. Affix the corresponding label to the designated location on the flow meter.

[0055] S22. Packing: According to the order requirements, pack the flow meter into the packaging box, add the necessary accessories according to the contents of the packing list, and tie the packaging box with packing straps. Affix the corresponding model number and flow meter number to the packaging box.

[0056] The working principle and advantages of the assembly method for a high-precision turbine flow meter for gas in this technical solution are as follows:

[0057] The above method clearly discloses several steps in the assembly process of high-precision turbine flow meters, minimizing problems such as confusion, inaccurate installation, misalignment, and interference during installation. It provides clear, reliable, and effective guidance for assembly workers, addressing common errors, inaccuracies, misalignment, and interference issues during the assembly of high-precision turbine flow meters. This method aims to improve the first-pass yield of high-precision turbine flow meters for gas applications, as well as the reliability, metering accuracy, and stability of the assembled flow meters. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the assembly of the measuring core according to an embodiment of the present invention;

[0059] Figure 2 This is a schematic diagram of the assembly of the movement assembly according to an embodiment of the present invention;

[0060] Figure 3 This is a schematic diagram of the overall assembly of an embodiment of the present invention;

[0061] Figure 4 This is a schematic diagram of the assembly of the magnetic coupling assembly according to an embodiment of the present invention;

[0062] Figure 5 This is a schematic diagram of the assembly of the counter group according to an embodiment of the present invention;

[0063] In the above attached figures:

[0064] 1. Measuring core holder; 2. Main drive shaft; 3. Measuring core cover; 4. Main drive shaft gear; 5. Intermediate gear; 6. Measuring core bolt; 7. Measuring core journal; 8. Connecting gear; 9. Drive shaft gear; 10. Input gear; 11. Output gear; 12. Gear holder; 13. Wave spring washer; 14. Flange bearing;

[0065] 15. Measuring core housing; 16. Measuring core assembly; 17. Fluid guide assembly; 18. Turbine; 19. Fluid guide ring; 20. Adjusting shim; 21. Positioning pin;

[0066] 22. Mechanism assembly; 23. Magnetic coupling assembly; 24. Counter assembly; 25. Pressure measuring connector; 26. Housing; 27. Measuring core fixing screw; 28. Drive shaft assembly; 29. ​​Temperature measuring plug; 30. Counter base; 31. Counter support plate; 32. Adjusting gear; 33. Adjusting wheel axle; 34. Surface label; 35. Surface paper; 36. Counter cover; 37. Lead seal; 38. Lead seal wire; 39. Nameplate; 40. Drive wheel; 41. Driven wheel; 42. Rivet; 43. Limit pin; 44. Aviation connector;

[0067] 45. Magnetic coupling upper cover; 46. Magnetic coupling lower cover; 47. Magnetic coupling partition;

[0068] 48. Reed switch plastic-encapsulated assembly; 49. Counter assembly;

[0069] 51. Bearing; 52. Screw; 53. Bearing retainer; 54. Washer; 55. Nut; 56. Baffle; 57. O-ring. Detailed Implementation

[0070] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] This embodiment provides a method for assembling a high-precision turbine flow meter for gas, which includes the following steps:

[0072] S1. Preparatory work: Check the measuring core 16, ensuring the gear transmission is flexible; check the quality of the parts, use fine sandpaper to remove burrs from all parts, clean the surface and inner holes of all parts, and blow the surface and inner holes of the parts with compressed air; through the pretreatment of each part, ensure the smooth assembly of subsequent steps and avoid parts affecting the use of the high-precision turbine 18 flow meter after installation.

[0073] like Figure 1As shown, S2, Measuring Core Assembly: S2.1, Apply anaerobic adhesive (using Loctite 603) to the outer cylindrical surface of the bottom of the measuring core journal 7 and the measuring core pin 6. Note that only apply a small amount of anaerobic adhesive to one side of the pin. Use a hand-operated press or other tool to press it into the corresponding shaft hole of the measuring core seat 1. At the same time, install the main drive shaft 2 into the measuring core seat 1 in the corresponding direction. S2.2, With the measuring core seat 1 in place and vertically positioned, install the wave spring washer 13, bearing 51, and bearing retainer 53 into the main drive shaft 2 in sequence. Fix the bearing 51 with the bearing retainer 53. Adjust the measuring core cover 3, tighten the screws 52, and check the spring clearance on the cover. S2.3, Install the flange bearing 14 into the measuring core seat 1. The main drive shaft gear 4 passes through the flange bearing 14, intermediate wheel 5, and flange bearing 14 in sequence. Finally, fix the flange bearing 14 with the bearing retainer 53. Fix the intermediate wheel 5 with two screws 52. Note that adjustments can only be made during the assembly process. At the end, proceed as follows: S2.4, Install bearing 51 into measuring core bolt 6, then install connecting gear 8, then install bearing 51 again, and fix it with bearing retainer 53 (use 1.2mm bearing retainer 53); S2.5, Drive shaft gear 9 passes through flange bearing 14, measuring core seat 1, flange bearing 14, input gear 10 in sequence, and finally fix flange bearing 14 with bearing retainer 53, and fix input gear 10 with two screws 52; S2.6, Install bearing 51 into measuring core bolt 6, then install output gear 11, and fix gear fixing bracket 12 with screws 52; S2.7, Move intermediate wheel 5 to the center, allowing intermediate wheel 5 to mesh with the center of main drive shaft 2, align it with main drive shaft 2, and make it perpendicular to the surface with fixing screws, check the position of each gear, the measuring core 16 rotates flexibly, and be careful not to overtighten screws 52; Assemble the measuring core in sequence according to these steps to ensure the subsequent use of the measuring core.

[0074] like Figure 2 As shown, S3, Measurement Core Installation: Insert the entire measurement core 16 into the measurement core housing 15 group, ensuring that the output port of the entire measurement core 16 is aligned with the output hole of the measurement core housing 15 group. Use the cylindrical screw 52 and the spring washer 54 to fix the entire measurement core 16 and the measurement core housing 15 group, and tighten the cylindrical screw 52. Following this step, the measurement core can be stably installed in the measurement core housing 15 group.

[0075] like Figure 2As shown, S4, turbine 18 assembly: For the assembly gap between the measuring core assembly 16 and the turbine 18, select a suitable adjusting shim 20 (various thicknesses of adjusting shims 20, such as 0.02mm, 0.05mm, and 0.1mm, can be used). The reference gap between the guide fluid assembly 17 and the turbine 18 is also considered. Place the adjusting shim 20 onto the output shaft of the measuring core assembly 16, then place the turbine 18 on it. Gently rotate the turbine 18 and observe whether it rotates flexibly; otherwise, reassemble. Push the locating pin 21 into the pin groove between the turbine 18 and the main drive shaft 2 of the measuring core. The locating pin 21 should not be higher than the plane of the turbine 18. Secure the turbine 18 with two left-hand nuts 55, ensuring both nuts 55 are tightened. Following these steps, the turbine 18 and the guide fluid assembly 17 can be assembled. By selecting adjusting shims 20 of different thicknesses according to the actual situation, collisions between the turbine 18 and the guide fluid end face can be prevented.

[0076] like Figure 2 As shown, S5, fluid guide assembly: The measuring core assembly 16, turbine 18, fluid guide, and measuring core housing 15 form a single unit. The measuring core housing 15 is placed vertically on the worktable. First, the guide ring 19 is installed into the measuring core housing 15, and then the fluid guide is placed on the housing 26 assembly. Note that there should be no friction between the fluid guide and the turbine 18 plane. The fluid guide assembly 17 is fixed with cylindrical screws 52 and spring washers 54. At the same time, the cylindrical screws 52 are tightened. O-rings 57 are used for sealing on the groove of the fluid guide and the groove of the measuring core housing 15. The O-rings 57 must not fall off. The fluid guide is stably assembled according to this step.

[0077] S6. Test the rotation time of the mechanism assembly 22: Blow compressed air into the guide fluid position of the mechanism assembly 22 until the turbine 18 rotates at high speed. Stop blowing air and start timing with a stopwatch to record the rotation test time of the mechanism assembly 22. If the rotation time of the turbine 18 meets the process requirements, proceed to the next step. Test the turbine 18 according to this step to ensure that the turbine 18 can operate normally before proceeding to the following assembly steps.

[0078] like Figure 3 As shown, S7, the assembly of the mechanism assembly 22 and the housing 26: Place the housing 26 horizontally on the worktable, apply grease to the sealing ring of the mechanism assembly 22 and the assembly position of the housing 26 and the sealing ring, and horizontally insert the mechanism assembly 22 into the hole of the housing 26, ensuring that the output hole on the top of the housing 26 is aligned with the output hole of the measuring core housing 15 assembly; screw the measuring core fixing screw 27 into the output hole of the housing 26 to fix the mechanism assembly 22, and apply a small amount of grease to the threads of the fixing screw 52; drive the limit pin 43 into the pin hole on the top of the housing 26; specifically, print the corresponding parameters on the nameplate 39 according to the order requirements, and rivet the nameplate 39 to the housing 26 with rivets 42; follow these steps to stably install the measuring core assembly inside the housing 26.

[0079] like Figure 3 As shown, S8, install the pressure test connector 25 and temperature test plug 29: apply grease to the temperature test plug 29 and O-ring 57, apply thread sealant to the pressure test connector 25, and tighten the screw 52; assemble the pressure test connector 25 and temperature test plug 29 according to this step.

[0080] like Figure 3 and Figure 4 As shown, S9, install the magnetic coupler assembly: insert two oil-lubricated bearings 51 into the bearing 51 holes of the lower magnetic coupling cover 46, and insert one grease-lubricated bearing 51 into the bearing 51 hole of the upper magnetic coupling cover 45. Place the upper magnetic coupling cover 45 assembly and the lower magnetic coupling cover 46 assembly onto the two shaft ends of the magnetic coupling partition 47 (note the dust protection of the magnetic coupling assembly 23); place the drive shaft assembly 28 into the output hole of the housing 26, ensuring the round end of the drive shaft assembly 28 is at the top; place the magnetic coupling assembly 23 into the output hole of the housing 26. Inside the hole, adjust the length of the drive shaft assembly 28. After adjusting it appropriately, remove the magnetic coupling assembly 23 and tighten the nut 55 on the drive shaft assembly 28 or use a drive shaft assembly 28 of the corresponding fixed length. Place the O-ring 57 into the output hole of the housing 26 and apply a small amount of grease to the surface of the O-ring 57. Slowly insert the magnetic coupling assembly 23 into the output hole of the housing 26. The counter drive shaft should pass through the drive hole of the output gear 11 on the measuring core assembly 16. Following these steps, assemble the magnetic coupler into the housing 26.

[0081] like Figure 3 As shown, S10, assemble the counter base 30 sets: put the four corner nuts 55 into the counter cover and screw the screws 52 into the two holes; put the O-ring 57 into the O-groove of the counter cover and apply a small amount of grease to the surface of the O-ring 57 and the cylinder above the outer shell 26; assemble the counter base 30 sets according to this step.

[0082] like Figure 3 and Figure 4 As shown, S11, the counter base 30 and counter support plate 31 are installed as follows: The counter base 30 assembly is fitted into the cylindrical hole above the housing 26, ensuring the counter base 30 assembly can rotate freely; grease is applied to the threaded hole above the housing 26 and the external thread of the counter support plate 31; a small amount of grease is applied to the surface of the O-ring 57; the counter support plate 31 is screwed into the threaded hole above the housing 26 and tightened; simultaneously, the conical fixing screw 52 is tightened, and the rotation of the counter base 30 assembly is checked; the grease on the surface is cleaned; after assembly, the counter base 30 assembly is covered with the counter cover 36 to prevent dust from entering; the counter base 30 and counter support plate 31 are installed following these steps.

[0083] S12. Pressure and airtightness test: Place the entire unit in the sealing pressure test device and conduct the test according to the general inspection process for pressure resistance and airtightness of gas flow meters. After the pressure resistance and airtightness test is completed, blow and wipe the surface of the flow meter to clean it, and cover the counter cover 36 on the counter base 30 and send it into the test area for inspection. Perform pressure resistance and airtightness test on the entire unit according to this step. After passing the test, proceed with the following assembly steps.

[0084] like Figure 5 As shown, S13, assemble counter assembly 24: fix the reed switch plastic seal assembly 48 onto the counter assembly 49; assemble counter assembly 24 according to this step.

[0085] like Figure 3 As shown, S14, install the aviation plug 44: fix the aviation plug 44 onto the counter cover 36; assemble the aviation plug 44 according to this step.

[0086] like Figure 3 As shown, S15, install the standard gear: screw the driving wheel 40 onto the external thread above the magnetic coupling assembly 23, and fix the adjusting gear 32 with the nut 55; assemble the standard gear according to this step.

[0087] like Figure 3 As shown, S16, install the adjusting wheel shaft 33; install the adjusting wheel shaft 33 in conjunction with the adjusting gear 32, specifically, set the upper baffle 54.

[0088] like Figure 3 As shown, S17, Fixing the counter group 24: Fix the counter group 24 to the counter base 30 with screws 52 to ensure that there is a certain gap between the driving and driven wheels 41; fix the counter group 24 according to this step.

[0089] like Figure 3 As shown, S18, Install the counter: Assemble the correct counter and fix it with screws 52 (counter group 24 configuration can be selected according to order requirements); fix the counter according to this step.

[0090] S19. Performance testing: Perform the test according to the general inspection process for gas flow meter table testing; conduct the performance test of the whole machine according to this step, and proceed with the following assembly steps after passing the test.

[0091] like Figure 3As shown, S20, assembling the counter housing: Attach the corresponding surface paper 35 to the surface label 34, install the surface label 34 on the counter assembly 24, and simultaneously fit the O-ring 57 into the groove on the outer circle of the counter base 30. Apply grease to the O-ring 57 and the counter cover 36, and cover the counter cover 36. Secure the counter cover 36 with screws 52. Insert the lead seal wire 38 into the small hole on the screw 52, ​​insert the lead seal 37, and stamp the lead seal 37. Assemble the counter housing according to these steps.

[0092] S21. Post-processing: Check the paint on the outer surface of the flowmeter for damage. If there is any damage, it needs to be repaired. Clean the outer surface of the flowmeter. Affix the corresponding label to the designated location on the flowmeter. Perform the remaining post-processing according to the general process specifications.

[0093] S22. Packing: According to the order requirements, pack the flow meter into the packaging box, add the necessary accessories according to the contents of the packing list, and tie the packaging box with packing straps. Affix the corresponding model number and flow meter number to the packaging box.

[0094] The above method clearly discloses several steps in the assembly process of the high-precision turbine 18 flow meter, minimizing problems such as confusion, inaccurate installation, misalignment, and interference during installation. It provides clear, reliable, and effective guidance for assembly workers, addressing common errors, inaccuracies, misalignment, and interference during the assembly of the high-precision turbine 18 flow meter. This method aims to improve the first-pass yield rate of the gas-use high-precision turbine 18 flow meter assembly, as well as its reliability, metering accuracy, and stability after completion.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for assembling a high-precision turbine flow meter for gas, characterized in that, Includes the following steps: S1. Preliminary work; S2, Measurement core assembly; S3. Measurement core installation; S4, Turbo Assembly: S5, Fluid Guide Assembly: S6. Test the rotation time of the movement assembly: S7. Assembly of movement components and housing: S8. Install pressure test connector and temperature test plug; S9. Install magnetic coupler assembly: S10, Install the counter base assembly; S11. Installation of counter base and counter support plate: S12, pressure resistance and airtightness test; S13, Install the counter group; S14. Install aviation connector; S15, Install standard gears: S16. Install the adjusting wheel shaft; S17, Fixed Counter Group: S18, Install the counter; S1, Preliminary work: Check the entire measuring core, ensuring the gear transmission is flexible; check the quality of the parts, use fine sandpaper to remove burrs from all parts, clean the surface and inner holes of all parts, and blow the surface and inner holes of the parts with compressed air. S2. Measuring core assembly: S2.

1. Apply anaerobic adhesive to the outer cylindrical surface of the measuring core journal and the bottom of the measuring core pin. Note that only apply a small amount of anaerobic adhesive to one side of the pin. Use a hand-operated press to press it into the corresponding shaft hole of the measuring core seat. At the same time, install the main drive shaft into the measuring core seat in the corresponding direction. S2.

2. Place the measuring core seat vertically. Install the wave spring washer, bearing, and bearing retainer into the main drive shaft in sequence. Fix the bearing with the bearing retainer. Adjust the measuring core cover, tighten the screws, and check the spring clearance on the cover. S2.

3. Install the flange bearing into the measuring core seat. The main drive shaft teeth pass through the flange bearing, intermediate wheel, and flange bearing in sequence. Finally, fix the flange bearing with the bearing retainer. Use two screws on the intermediate wheel. S2.

4. Secure the bearing with the measuring core bolt, then install the connecting gear, then install the bearing again, and secure it with the bearing retainer. S2.

5. The drive shaft teeth pass sequentially through the flange bearing, measuring core seat, flange bearing, and input gear. Finally, secure the flange bearing with the bearing retainer and secure the input gear with two screws. S2.

6. Install the bearing with the measuring core bolt, then install the output gear, and secure the gear holder with screws. S2.

7. Move the intermediate wheel to the center, allowing it to mesh with the center of the main drive shaft. Align it with the main drive shaft and make it perpendicular to the surface with the fixing screws. Check the position of each gear. The measuring core should rotate freely. Be careful not to overtighten the screws. S3, Measurement Core Installation: Insert the entire measurement core into the measurement core housing assembly, ensuring that the output port of the entire measurement core is aligned with the output hole of the measurement core housing assembly. Use a cylindrical screw with a spring washer to fix the entire measurement core to the measurement core housing assembly, and tighten the cylindrical screw. S4, Turbine Assembly: Adjust the gap between the measuring core assembly and the turbine assembly by selecting appropriate adjusting shims. Choose adjusting shims of different thicknesses according to different flow meter specifications. Place the adjusting shims onto the output shaft of the measuring core assembly, and then put on the turbine. Gently rotate the turbine to observe whether the turbine rotates flexibly. If not, reassemble. Push the locating pin into the pin groove between the turbine and the main drive shaft of the measuring core. The locating pin should not be higher than the plane of the turbine. Secure the turbine with two left-hand nuts, ensuring that both nuts are tightened. S5, Fluid Guide Assembly: The measuring core assembly, turbine, fluid guide, and measuring core housing assembly form a single unit. Place the measuring core housing assembly vertically on the worktable. First, install the fluid guide ring into the measuring core housing assembly, and then place the fluid guide on the housing assembly. Note that there should be no friction between the fluid guide and the turbine surface. Fix the fluid guide assembly with cylindrical screws and spring washers, and tighten the cylindrical screws. Put O-rings on the grooves of the fluid guide and the measuring core housing. The O-rings must not fall off.

2. The assembly method of a high-precision turbine flow meter for gas as described in claim 1, characterized in that, S6, Test the rotation time of the mechanism assembly: Blow compressed air into the guide fluid position of the mechanism assembly until the turbine rotates at high speed, then stop blowing air and start timing with a stopwatch to record the rotation test time of the mechanism assembly; proceed to the next step only after the turbine rotation time meets the process requirements.

3. The assembly method of a high-precision turbine flow meter for gas as described in claim 1, characterized in that, S7, Assembly of the mechanism assembly and the housing: Place the housing horizontally on the worktable, apply grease to the sealing ring of the mechanism assembly and the assembly position of the housing and the sealing ring, use a push-in tool to horizontally insert the mechanism assembly into the hole of the housing, and make sure that the output hole on the top of the housing is aligned with the output hole of the measuring core housing assembly; screw the measuring core fixing screw into the output hole of the housing to fix the mechanism assembly, and make sure to apply a small amount of grease to the threads of the fixing screw; drive the limit pin into the pin hole on the top of the housing; S8, install the pressure test connector and temperature test plug: apply grease to the temperature test plug and O-ring, apply thread sealant to the pressure test connector, and tighten the nut; S9, Installing the magnetic coupler assembly: Insert two oil-lubricated bearings into the bearing holes of the lower magnetic coupler cover, and one grease-lubricated bearing into the bearing hole of the upper magnetic coupler cover. Place the upper and lower magnetic coupler covers onto the two shaft ends of the magnetic coupler partition. Place the drive shaft assembly into the output hole of the housing, ensuring the round end of the drive shaft assembly is at the top. Place the magnetic coupler assembly into the output hole of the housing, adjust the length of the drive shaft assembly, and remove the magnetic coupler assembly after proper adjustment. Tighten the nut on the drive shaft assembly or use a drive shaft assembly of appropriate fixed length. Place the O-ring into the output hole of the housing and apply a small amount of grease to the surface of the O-ring. Slowly place the magnetic coupler assembly into the output hole of the housing, ensuring the counter drive shaft passes through the output gear drive hole on the measuring core assembly.

4. The assembly method of a high-precision turbine flow meter for gas as described in claim 1, characterized in that, S10, Install the counter base assembly: Place the four corner nuts into the counter cover and screw them into the two holes; fit the O-ring into the O-groove of the counter cover and apply a small amount of grease to the surface of the O-ring and the cylinder above the outer shell; S11, installation of the counter base and counter support plate: fit the counter base assembly into the cylindrical hole on the top of the housing, ensuring the counter base assembly can rotate freely; apply grease to the threaded hole on the top of the housing and the external thread of the counter support plate, apply a small amount of grease to the O-ring surface, screw the counter support plate into the threaded hole on the top of the housing and tighten it, simultaneously tighten the conical fixing screw, and check the rotation of the counter base assembly, cleaning the grease from the surface; after assembly, cover the counter base assembly with the counter cover to prevent dust from entering.

5. The assembly method of a high-precision turbine flow meter for gas as described in claim 1, characterized in that, S12, pressure resistance and airtightness test: The whole machine is placed in the sealing pressure resistance test device and tested according to the general inspection process of pressure resistance and airtightness of gas flow meter. After the pressure resistance and airtightness test is completed, the surface of the flow meter is purged and wiped to clean the surface. The counter is then covered on the counter base and sent to the test area for inspection.

6. The assembly method of a high-precision turbine flow meter for gas as described in claim 1, characterized in that, S13, Installing the counter assembly: Fix the reed switch plastic-encapsulated assembly onto the counter assembly; S14, Installing the aviation plug: Fix the aviation plug onto the counter cover; S15, Install standard gear: Rotate the drive wheel onto the external thread above the magnetic coupling assembly, and fix the adjusting gear with a nut; S17, fixing the counter group: fixing the counter group to the counter base group with screws, so that a certain gap is maintained between the driving and driven wheels; S18, Install the counter: Assemble the correct counter and secure it with screws.

7. A method for assembling a high-precision turbine flow meter for gas as described in any one of claims 1 to 6, characterized in that, It also includes the following steps: S19. Performance testing: The test shall be conducted in accordance with the general inspection process for gas flow meter tabulation testing. S20. Install the counter housing: Paste the corresponding surface paper onto the surface label, install the surface label onto the counter assembly, and simultaneously insert the O-ring into the groove on the outer circle of the counter base. Apply grease to the O-ring and the counter cover, and then cover the counter cover with screws. Secure the counter cover with screws, insert the lead seal thread into the small hole on the screw, insert the lead seal, and affix the lead seal.

8. The assembly method of a high-precision turbine flow meter for gas as described in claim 7, characterized in that, It also includes the following steps: S21. Post-processing: Check the paint on the outer surface of the flow meter for damage. If there is any damage, it needs to be repaired. Clean the outer surface of the flow meter. Affix the corresponding label to the designated location on the flow meter. S22. Packing: According to the order requirements, pack the flow meter into the packaging box, add the necessary accessories according to the contents of the packing list, and tie the packaging box with packing straps. Affix the corresponding model number and flow meter number to the packaging box.

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