A flange welding device for Coriolis mass flowmeter

Abstract

The present invention discloses a flange welding device for a Coriolis mass flowmeter, which relates to the technical field of flange welding. The device comprises an operating table, a flowmeter main body and two flanges. Two auxiliary welding mechanisms distributed on the left and right are installed above the operating table. The auxiliary welding mechanisms comprise a movable seat, an adaptor mounting seat, a fixed-axis leveling mechanism and a traction mechanism. The fixed-axis leveling mechanism enables the flange to be coaxial with the end of the flowmeter main body, and the traction of the traction mechanism enables the flange to be clamped. At this time, it is possible to detect whether the flange is vertical. At the same time, the flange can be actively adjusted so that it is perpendicular to the end of the flowmeter main body. The movable seat and the adaptor mounting seat can realize three-axis positioning of the flange. Finally, the movable seat enables the flange fixed axis to be vertically attached to the end of the flowmeter main body. Then, the welding operation can be performed. The welding position of the flange and the flowmeter main body is more accurate, which is beneficial to the subsequent assembly and use of the Coriolis flowmeter.

Description

Technical Field

[0001] The present invention relates to the technical field of flange welding, and in particular to a flange welding device for a Coriolis mass flowmeter. Background Art

[0002] A Coriolis mass flowmeter, also known as a Coriolis flowmeter, is a device that directly measures mass flow by utilizing the Coriolis force generated by fluid flowing through a vibrating pipe, which is proportional to the mass flow rate. It consists of a flow sensor and a converter. Coriolis mass flowmeters achieve direct mass flow measurement with high accuracy and the ability to measure multiple media and process parameters. They are widely used in the petrochemical, pharmaceutical, and food industries.

[0003] During production, a Coriolis mass flowmeter needs to be welded with a flange at its end so that the flowmeter can be quickly installed and used during normal use. After searching, the technical solution described in the public document CN217605051U, a flange welding device for a Coriolis mass flowmeter, can position the flange so that it is coaxial with the flowmeter for welding, but the structure of the positioning flange cannot be applied to the production and welding of different types of Coriolis flowmeters. The positioning is mainly achieved through the bolt holes of the flange, but the bolt holes of different sizes are at different distances from the flange axis, so it cannot be applied to the welding of multiple types of flowmeters. The technical solution described in the public document CN210306520U, a clamping device for welding an electromagnetic flowmeter to a flange, can clamp and fix flanges of different sizes so that they are coaxial with the flowmeter during flange welding, but it cannot ensure that the flange is in a vertical state when fixed, that is, the flange and the flowmeter welding surface cannot be guaranteed to be perpendicular, and the flange may be tilted and coaxial. This will also affect the subsequent assembly and use of the product after welding.

[0004] Therefore, in order to solve the above problems, the present application proposes a flange welding device for a Coriolis mass flowmeter. Summary of the Invention

[0005] The present invention provides a flange welding device for a Coriolis mass flowmeter to solve the above technical problems.

[0006] To solve the above technical problems, the present invention provides a flange welding device for a Coriolis mass flowmeter, comprising an operating table, a flowmeter body, and two flanges. The flowmeter body is located above the operating table and between the two flanges. Two auxiliary welding mechanisms are installed above the operating table, distributed left and right. The auxiliary welding mechanisms are used to clamp the flanges and weld them to the ends of the flowmeter body.

[0007] The auxiliary welding mechanism includes a moving seat, an adaptor mounting seat, a fixed axis leveling mechanism and a traction mechanism. The moving seat is installed on the top of the operating table, and the adaptor mounting seat is installed on the top of the moving seat.

[0008] The adapter mounting seat includes a first threaded rod, which is located on the axis of the end of the flowmeter body. The fixed axis leveling mechanism and the traction mechanism are both installed on the first threaded rod, and the fixed axis leveling mechanism is located on the side of the traction mechanism close to the flowmeter body.

[0009] Preferably, the movable seat includes a movable plate and a first electric push rod, the movable plate is slidably connected to the top of the operating table, the first electric push rod is fixedly connected to the top of the operating table, the first electric push rod is located on the side of the movable plate away from the flowmeter body, and the end of the piston rod of the first electric push rod is fixedly connected to one side of the movable plate.

[0010] Preferably, the adapter mounting seat also includes a first connecting plate and a second connecting plate, the second connecting plate is slidably connected to the top of the first connecting plate, two rectangular telescopic brackets distributed on the left and right are fixedly connected between the first connecting plate and the movable plate, a first hand screw is threadedly connected at the bottom center of the first connecting plate, the first hand screw is used to fix the position of the second connecting plate on the first connecting plate, the first threaded rod is located above the second connecting plate, and two fixed brackets distributed on the left and right are fixedly connected between the second connecting plate and the first threaded rod.

[0011] Preferably, the fixed-axis leveling mechanism includes a single-sided open hollow cylinder, which is fixedly connected to one end of the first threaded rod close to the flowmeter body, and the outer end of the first threaded rod is sleeved with a conical block and a first threaded seat, and the conical block and the first threaded seat are respectively slidably connected and threadedly connected to the first threaded rod, and the first threaded seat is movably connected to the side of the conical block away from the single-sided open hollow cylinder, and the conical block is located on one side of the single-sided open hollow cylinder and extends to the inside of the single-sided open hollow cylinder, and the outer end of the single-sided open hollow cylinder is penetrated by a plurality of top wall brackets, and the plurality of top wall brackets are distributed in a circular array around the central axis of the single-sided open hollow cylinder.

[0012] Preferably, the top wall bracket includes a movable plate, which passes through a single-sided open hollow cylinder, and a plurality of circular holes are opened on the movable plate, one of the circular holes is connected with a third hand screw, and the movable plate is fixedly connected to a top wall rod by the third hand screw, and the outer end of the top wall rod is fixedly connected to a stopper, the stopper is located on the outside of the flange, and a pressure sensor is embedded in the side of the stopper close to the flange, the pressure sensor is in contact with the outside of the flange, the top wall rod passes through the center hole of the flange and extends into the end tube of the flowmeter body, and the outer end of the top wall rod is in contact with the inner wall of the center hole of the flange and the inner wall of the end tube of the flowmeter body.

[0013] Preferably, an extension plate is integrally formed and connected to the bottom of one side of the single-side open hollow cylinder, a slide groove is provided on the extension plate, and a slider is integrally formed and connected to the bottom of one side of the conical block, and the slider is slidably connected inside the slide groove.

[0014] Preferably, a plurality of first rectangular sleeves are fixedly connected to the outer end of the single-sided open hollow cylinder, the movable plate passes through the first rectangular sleeve, the parts of the plurality of movable plates located inside the single-sided open hollow cylinder are commonly connected to an elastic ring, and the corners of one side of the movable plate close to the single-sided open hollow cylinder are chamfered.

[0015] Preferably, the traction mechanism includes a sleeve, one side of the sleeve is movably connected to a second threaded seat, the sleeve and the second threaded seat are both sleeved on the outer end of the first threaded rod, and the sleeve and the second threaded seat are respectively slidably connected and threadedly connected to the first threaded rod, and the outer end of the sleeve is fixedly connected to a plurality of second rectangular sleeves, the second rectangular sleeve is plugged into a traction arm, the side surface of the second rectangular sleeve is threadedly connected to a fourth hand screw, the second rectangular sleeve and the traction arm are fixedly connected by a fourth hand screw, the traction arm is composed of a first L-shaped rod, a second L-shaped rod and a second electric push rod, the first L-shaped rod and the second L-shaped rod are plugged in and connected, and the second electric push rod is fixedly connected to the inner side of the first L-shaped rod and the second L-shaped rod plug-in connection, a scale line is processed on the outer side of a section where the first L-shaped rod and the second rectangular sleeve are plugged in, and an insert block is fixedly connected to the inner side of the end of the second L-shaped rod, the flange is located between the plurality of traction arms, and the insert block passes through the flange bolt hole.

[0016] Preferably, a limiting block is integrally formed on the inner wall of the sleeve, a limiting groove is provided at the outer end of the first threaded rod, the limiting block is located inside the limiting groove, and the sleeve is connected to the first threaded rod in a limiting sliding manner through the limiting block and the limiting groove.

[0017] Preferably, a fixing seat is fixedly installed at the center of the top of the operating table, and the fixing seat is used to fix the flow meter body;

[0018] The fixing seat includes a base, which is fixedly connected to the top of the operating table, an arc-shaped support block is fixedly connected to the center of the top of the base, and U-shaped plates are fixedly connected on both sides of the top of the base. Two clamping mechanisms distributed on the left and right are connected through the front and back sides of the U-shaped plate;

[0019] The clamping mechanism includes a second threaded rod, which passes through the U-shaped plate and is threadedly connected to the U-shaped plate. One end of the second threaded rod located on the outside of the U-shaped plate is fixedly connected to a rotating wheel, and one end of the second threaded rod located on the inside of the U-shaped plate is movably connected to a hard plate, and an arc-shaped clamping block is fixedly connected to the inside of the hard plate.

[0020] Compared with related technologies, the flange welding device for a Coriolis mass flowmeter provided by the present invention has the following beneficial effects:

[0021] The flowmeter body can be fixed by the fixed seat, and the fixed axis leveling mechanism can make the flange coaxial with the end of the flowmeter body, and then the flange is clamped by the traction of the traction mechanism. At this time, it can be detected whether the flange is vertical, and it can also be actively adjusted to make the flange perpendicular to the end of the flowmeter body. The movable seat and the adapter mounting seat can realize the three-axis positioning of the flange. Finally, the movable seat makes the flange fixed axis vertically attached to the end of the flowmeter body, and then the welding operation can be carried out. The welding position of the flange and the flowmeter body is more accurate, which is conducive to the subsequent assembly and use of the Coriolis flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the movable seat and the adapting mounting seat of the present invention;

[0024] Figure 3 A partial exploded view of the adapter mounting seat of the present invention;

[0025] Figure 4 This is a schematic structural diagram of a first threaded rod according to the present invention;

[0026] Figure 5 This is a structural diagram of the fixed-axis leveling mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of a top view and cross-section of the fixed axis leveling mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the conical block structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the structural effect of multiple movable panels connected by elastic rings of the present invention;

[0030] Figure 9 Schematic diagram of the top wall support structure of the present invention;

[0031] Figure 10 It is a structural schematic diagram of the traction mechanism of the present invention;

[0032] Figure 11 It is a schematic diagram of the sleeve structure of the present invention;

[0033] Figure 12 It is a schematic structural diagram of the fixing seat of the present invention.

[0034] Numbers in the figure: 1. Operating table, 2. Flowmeter body, 3. Flange, 4. Moving seat, 41. Moving plate, 42. First electric push rod, 5. Adapter mounting seat, 51. First connecting plate, 52. Second connecting plate, 53. First hand screw, 54. Rectangular telescopic bracket, 541. Second hand screw, 55. First threaded rod, 551. Limiting groove, 56. Fixed bracket, 6. Fixed axis leveling mechanism, 61. Single-side opening hollow cylinder, 611. First rectangular sleeve, 612. Extension plate, 613. Slide groove, 62. Top wall bracket, 621. Movable plate, 622. Round hole, 623. Third hand screw, 624. Top wall rod , 625, stop block, 626, pressure sensor, 63, tapered block, 631, slider, 64, first threaded seat, 65, elastic ring, 7, traction mechanism, 71, sleeve, 711, limit block, 72, second threaded seat, 73, second rectangular sleeve, 74, fourth hand screw, 75, traction arm, 751, first L-shaped rod, 752, second L-shaped rod, 753, second electric push rod, 76, scale line, 77, insert block, 8, fixed seat, 81, base, 82, arc-shaped support block, 83, U-shaped plate, 84, clamping mechanism, 841, second threaded rod, 842, rotating wheel, 843, hard plate, 844, arc-shaped clamping block. DETAILED DESCRIPTION

[0035] See also Figure 1-12 The technical solution provided by the present invention specifically includes the following embodiments:

[0036] The present invention includes an operating table 1, a flow meter body 2, and two flanges 3. The flow meter body 2 is located above the operating table 1 and between the two flanges 3. Two auxiliary welding mechanisms are installed above the operating table 1 and distributed on the left and right. The auxiliary welding mechanisms are used to clamp the flanges 3 and weld them to the ends of the flow meter body 2.

[0037] The auxiliary welding mechanism includes a moving seat 4, an adaptor mounting seat 5, a fixed axis leveling mechanism 6 and a traction mechanism 7. The moving seat 4 is mounted on the top of the operating table 1, and the adaptor mounting seat 5 is mounted on the top of the moving seat 4.

[0038] The adapter mounting seat 5 includes a first threaded rod 55, which is located on the end axis of the flowmeter body 2. The fixed axis leveling mechanism 6 and the traction mechanism 7 are both installed on the first threaded rod 55, and the fixed axis leveling mechanism 6 is located on the side of the traction mechanism 7 close to the flowmeter body 2.

[0039] The movable seat 4 includes a movable plate 41 and a first electric push rod 42. The movable plate 41 is slidably connected to the top of the operating table 1. The first electric push rod 42 is fixedly connected to the top of the operating table 1. The first electric push rod 42 is located on the side of the movable plate 41 away from the flowmeter body 2, and the end of the piston rod of the first electric push rod 42 is fixedly connected to one side of the movable plate 41.

[0040] The adapter mounting base 5 also includes a first connecting plate 51 and a second connecting plate 52, the second connecting plate 52 is slidably connected to the top of the first connecting plate 51, and two rectangular telescopic brackets 54 distributed on the left and right are fixedly connected between the first connecting plate 51 and the movable plate 41, and a second hand-tightening screw 51 for fixing is installed on the rectangular telescopic bracket 54, and a first hand-tightening screw 53 is threadedly connected at the bottom center of the first connecting plate 51, and the first hand-tightening screw 53 is used to fix the position of the second connecting plate 52 on the first connecting plate 51, the first threaded rod 55 is located above the second connecting plate 52, and two fixed brackets 56 distributed on the left and right are fixedly connected between the second connecting plate 52 and the first threaded rod 55.

[0041] The movable seat 4 cooperates with the adapter mounting seat 5 to realize the three-axis adjustment position of the flange 3 when the flange 3 is clamped. When the flange 3 is not fixed to the flow meter body 2, the first hand-tightening screw 53 and the second hand-tightening screw 541 in the adapter mounting seat 5 are both loosened, that is, the rectangular telescopic bracket 54 can be extended and retracted up and down, and the second connecting plate 52 can be moved back and forth, so that the position of the first threaded rod 55 can be moved according to demand. When the flange 3 is fixed, tightening the first hand-tightening screw 53 and the second hand-tightening screw 541 can make the entire adapter mounting seat 5 in a locked state. At this time, the flange 3 can only move left and right, and then the movable seat 4 can push the flange 3 to be fixed vertically on the end of the flow meter body 2 for welding.

[0042] The fixed-axis leveling mechanism 6 includes a single-sided open hollow cylinder 61, which is fixedly connected to one end of the first threaded rod 55 close to the flowmeter body 2. The outer end of the first threaded rod 55 is sleeved with a conical block 63 and a first threaded seat 64. The conical block 63 and the first threaded seat 64 are respectively slidably connected and threadedly connected to the first threaded rod 55. The first threaded seat 64 is movably connected to the side of the conical block 63 away from the single-sided open hollow cylinder 61. The conical block 63 is located on one side of the single-sided open hollow cylinder 61 and extends to the inside of the single-sided open hollow cylinder 61. The outer end of the single-sided open hollow cylinder 61 is penetrated by a plurality of top wall brackets 62, and the plurality of top wall brackets 62 are distributed in a circular array with the central axis of the single-sided open hollow cylinder 61.

[0043] When the first threaded seat 64 moves with the conical block 63, the inclined surface of the conical block 63 can support multiple top wall brackets 62 and move them away from each other coaxially until the top wall brackets 62 are pressed against the center hole of the flange 3 and the inner wall of the end tube of the flowmeter body 2. At this time, the flange 3 and the end of the flowmeter body 2 are in a coaxial state.

[0044] It is worth mentioning that the two fixing brackets 56 used to fix and support the first threaded rod 55, one fixing bracket 56 is fixed to the end of the first threaded rod 55 away from the single-sided open hollow cylinder 61, and the other fixing bracket 56 is fixed to the bottom of the single-sided open hollow cylinder 61. Since the single-sided open hollow cylinder 61 is fixedly connected to the end of the first threaded rod 55, the two fixing brackets 56 support and fix the two ends of the first threaded rod 55.

[0045] The top wall bracket 62 includes a movable plate 621, which passes through the single-sided open hollow cylinder 61. A plurality of circular holes 622 are provided on the movable plate 621, one of which is connected to a third hand-tightening screw 623. A top wall rod 624 is fixedly connected to the movable plate 621 through the third hand-tightening screw 623. A stopper 625 is fixedly connected to the outer end of the top wall rod 624. The stopper 625 is located on the outside of the flange 3, and a pressure sensor 626 is embedded on the side of the stopper 625 close to the flange 3. The pressure sensor 626 is in contact with the outside of the flange 3. The top wall rod 624 passes through the center hole of the flange 3 and extends into the end tube of the flowmeter body 2, and the outer end of the top wall rod 624 is in contact with the inner wall of the center hole of the flange 3 and the inner wall of the end tube of the flowmeter body 2.

[0046] The component that supports the center hole of the flange 3 and the inner wall of the end tube of the flowmeter body 2 is the top wall rod 624, and the stopper 625 is located on the side of the flange 3 away from the flowmeter body 2. When the flange 3 is pulled by the traction mechanism 7, it is pressed on multiple stoppers 625, and the pressure value is detected by the pressure sensor 626. According to whether the pressure values ​​detected by multiple pressure sensors 626 are the same, it can be determined whether the flange 3 is in a vertical state, that is, whether the flange 3 is perpendicular to the end of the flowmeter body 2. If the flange 3 is not vertical, the traction mechanism 7 can be used to adjust the force of pulling the flange 3 to fine-tune the angle of the flange 3;

[0047] The top wall rod 624 is fixed to the movable plate 621 by a third hand screw 623. The position of the top wall rod 624 can be adjusted through different circular holes 622, so that the fixed axis leveling mechanism can be used for flange welding of Coriolis flowmeters of different sizes and models.

[0048] An extension plate 612 is integrally formed at the bottom of one side of the single-side open hollow cylinder 61 , and a slide groove 613 is provided on the extension plate 612 . A slider 631 is integrally formed at the bottom of the conical block 63 , and the slider 631 is slidably connected inside the slide groove 613 .

[0049] When the conical block 63 moves left and right, the slider 631 cooperates with the slide groove 613 on the extension plate 612 to achieve limited sliding, thereby improving the stability of the conical block 63 during movement and preventing it from rotating arbitrarily with the first threaded seat 64.

[0050] The outer end of the single-sided open hollow cylinder 61 is fixedly connected to multiple first rectangular sleeves 611, and the movable plate 621 passes through the first rectangular sleeve 611. The parts of the multiple movable plates 621 located inside the single-sided open hollow cylinder 61 are commonly connected to an elastic ring 65, and the corners of the movable plate 621 on one side close to the single-sided open hollow cylinder 61 are chamfered.

[0051] Through the first rectangular sleeve 611, the movable plate 621 can remain vertical to the outer wall of the single-sided open hollow cylinder 61 no matter what position it is stretched to by the conical block 63, so that the top wall bracket 62 can always maintain a relatively precise working state. An arc-shaped hole for the elastic ring 65 to pass through is provided on the movable plate 621. When the conical block 63 moves in the opposite direction, the elastic ring 65 can synchronously contract all the top wall brackets 62 and move them closer to the axis.

[0052] The traction mechanism 7 includes a sleeve 71, one side of the sleeve 71 is movably connected to a second threaded seat 72, the sleeve 71 and the second threaded seat 72 are both sleeved on the outer end of the first threaded rod 55, and the sleeve 71 and the second threaded seat 72 are respectively slidably connected and threadedly connected to the first threaded rod 55, and the outer end of the sleeve 71 is fixedly connected to a plurality of second rectangular sleeves 73, a traction arm 75 is plugged into the second rectangular sleeve 73, and a fourth hand screw 74 is threadedly connected to the side of the second rectangular sleeve 73, and the second rectangular sleeve 73 and the traction arm 75 are fixedly connected by the fourth hand screw 74 The traction arm 75 is composed of a first L-shaped rod 751, a second L-shaped rod 752 and a second electric push rod 753. The first L-shaped rod 751 and the second L-shaped rod 752 are plugged into each other, and the second electric push rod 753 is fixedly connected to the inner side of the plug-in point of the first L-shaped rod 751 and the second L-shaped rod 752. A scale line 76 is processed on the outer side of a section where the first L-shaped rod 751 and the second rectangular sleeve 73 are plugged into each other, and an insert block 77 is fixedly connected to the inner side of the end of the second L-shaped rod 752. The flange 3 is located between multiple traction arms 75, and the insert block 77 passes through the bolt hole of the flange 3.

[0053] The traction arm 75 in the traction mechanism 7 can buckle the outer edge of the flange 3 and press the flange 3 on the block 625 in the top wall bracket 62, so that the flange 3 tends to a vertical state, and the pressure value can also be measured by the pressure sensor 626 on each block 625 to intuitively determine whether the flange 3 is vertical. If there is a pressure difference in the pressure measurement data, the length of the traction arm 75 can be adjusted by the second electric push rod 753 to adjust the local force of the traction flange 3, thereby fine-tuning the angle of the flange 3.

[0054] A limiting block 711 is integrally formed on the inner wall of the sleeve 71, and a limiting groove 551 is provided at the outer end of the first threaded rod 55. The limiting block 711 is located inside the limiting groove 551. The sleeve 71 is connected to the first threaded rod 55 in a limited sliding manner through the limiting block 711 and the limiting groove 551.

[0055] The limiting groove 551 and the limiting block 711 can ensure that the sleeve 71 remains stable when moving and does not rotate along with the second threaded seat 72 .

[0056] A fixing seat 8 is fixedly installed at the top center of the operating table 1, and the fixing seat 8 is used to fix the flow meter body 2;

[0057] The fixing base 8 includes a base 81, which is fixedly connected to the top of the operating table 1. An arc-shaped support block 82 is fixedly connected to the center of the top of the base 81. U-shaped plates 83 are fixedly connected to both sides of the top of the base 81. Two clamping mechanisms 84 distributed on the left and right are connected through the front and back sides of the U-shaped plate 83.

[0058] The clamping mechanism 84 includes a second threaded rod 841, which passes through the U-shaped plate 83 and is threadedly connected to the U-shaped plate 83. The end of the second threaded rod 841 located on the outside of the U-shaped plate 83 is fixedly connected to a rotating wheel 842, and the end of the second threaded rod 841 located inside the U-shaped plate 83 is movably connected to a hard plate 843, and the inside of the hard plate 843 is fixedly connected to an arc-shaped clamping block 844.

[0059] The flow meter body 2 can be fixed by the fixing seat 8, the arc-shaped supporting block 82 can support the bottom of the flow meter body 2, and the four clamping mechanisms 84 can be used to clamp and fix the flow meter body 2 from front to back.

[0060] Working principle:

[0061] When in use, the position of the flow meter body 2 is first fixed by the fixing seat 8, and then the flange 3 is positioned at the end of the flow meter body 2 by the fixed axis leveling mechanism 6, and the flange 3 and the end of the flow meter body 2 are coaxial, and then the edge of the flange 3 is pulled by the traction mechanism 7, and the fixed axis leveling mechanism 6 is cooperated to make the flange 3 in a vertical state, that is, the flange 3 and the end of the flow meter body 2 are coaxial and perpendicular, and then the movable adapter mounting seat 5 is fixed, so that the height and front and back position of the flange 3 are fixed, and then the adapter mounting seat 5, the fixed axis leveling mechanism 6 and the traction mechanism 7 as well as the flange 3 clamped and fixed by the fixed axis leveling mechanism 6 and the traction mechanism 7 can be driven by the movable seat 4 to move close to the end of the flow meter body 2 until the flange 3 is coaxial and vertically attached to the end of the flow meter body 2, and then the welding operation can be carried out;

[0062] When the flange 3 is not aligned with the flow meter body 2, the first hand screw 53 and the second hand screw 541 in the adapter mounting base 5 are both loosened, that is, the rectangular telescopic bracket 54 can be extended and retracted up and down, and the second connecting plate 52 can be moved forward and backward, so that the position of the first threaded rod 55 can be moved as needed. When the flange 3 is aligned, tightening the first hand screw 53 and the second hand screw 541 can lock the entire adapter mounting base 5. At this time, the flange 3 can only move left and right.

[0063] When aligning the flange 3, the multiple top wall brackets 62 in the axis leveling mechanism 6 can first be passed through the center hole of the flange 3 and extended into the end tube of the flow meter body 2, and then the first threaded seat 64 is rotated to move the tapered block 63 toward the inside of the single-side open hollow cylinder 61. During this period, the inclined surface of the tapered block 63 gradually lifts the multiple movable plates 621, thereby causing the multiple top wall rods 624 to move away from each other, until the multiple top wall rods 624 are evenly pressed against the inner wall of the center hole of the flange 3 and the inner wall of the end tube of the flow meter body 2. At this time, the flange 3 is coaxial with the end of the flow meter body 2.

[0064] When the second threaded seat 72 is rotated, the sleeve 71 moves on the first threaded rod 55 until the end of the traction arm 75 is buckled into the outer edge of the flange 3 and the plug 77 is inserted into the bolt hole of the flange 3. Then, the second threaded seat 72 is rotated in the opposite direction to make the sleeve 71 move in the opposite direction. At this time, the flange 3 is pulled by the multiple second threaded seats 72, and when the flange 3 is pulled, it will be blocked by the multiple stops 625. The stops 625 cooperate with the traction arm 75 to clamp the flange 3. At this time, the flange 3 is forced to be in a vertical state, and the pressure sensor 626 on the stopper 625 can detect the pressure value between the flange 3 and the stopper 625. When the pressure values ​​of the multiple pressure sensors 626 are the same, it means that the flange 3 is vertical, otherwise it means that the flange 3 is not vertical. At this time, the length of the traction arm 75 can be adjusted by the second electric push rod 753 in the traction arm 75 to achieve fine-tuning of the position angle of the flange 3;

[0065] After the flange 3 is fixed by axis leveling and clamping, the first electric push rod 42 pushes the movable plate 41 to move so that the flange 3 is in close contact with the end of the flow meter body 2, and then the welding operation can be carried out.

Claims

1. A flange welding device for a Coriolis mass flowmeter, comprising an operating table (1), a flowmeter body (2), and two flanges (3), wherein the flowmeter body (2) is located above the operating table (1), and the flowmeter body (2) is located between the two flanges (3), characterized in that: Two auxiliary welding mechanisms are installed on the upper side of the operating table (1) and are distributed on the left and right. The auxiliary welding mechanisms are used to clamp the flange (3) and weld it to the end of the flow meter body (2); The auxiliary welding mechanism comprises a movable seat (4), an adaptor mounting seat (5), a fixed axis leveling mechanism (6) and a traction mechanism (7); the movable seat (4) is mounted on the top of the operating table (1); and the adaptor mounting seat (5) is mounted on the top of the movable seat (4); The adapter mounting seat (5) comprises a first threaded rod (55), the first threaded rod (55) is located on the axis of the end of the flow meter body (2), the fixed axis leveling mechanism (6) and the traction mechanism (7) are both installed on the first threaded rod (55), and the fixed axis leveling mechanism (6) is located on a side of the traction mechanism (7) close to the flow meter body (2); The fixed axis leveling mechanism (6) includes a single-side open hollow cylinder (61), the single-side open hollow cylinder (61) is fixedly connected to one end of the first threaded rod (55) close to the flow meter body (2), the outer end of the first threaded rod (55) is sleeved with a tapered block (63) and a first threaded seat (64), the tapered block (63) and the first threaded seat (64) are respectively slidably connected and threadedly connected to the first threaded rod (55), the first threaded seat (64) is movably connected to the side of the tapered block (63) away from the single-side open hollow cylinder (61), the tapered block (63) is located on one side of the single-side open hollow cylinder (61) and extends into the interior of the single-side open hollow cylinder (61), the outer end of the single-side open hollow cylinder (61) is penetrated and connected with a plurality of top wall brackets (62), and the plurality of top wall brackets (62) are distributed in a ring array around the central axis of the single-side open hollow cylinder (61); The top wall bracket (62) includes a movable plate (621), the movable plate (621) passes through the single-side open hollow cylinder (61), a plurality of circular holes (622) are opened on the movable plate (621), a third hand screw (623) is passed through the inside of one of the circular holes (622), a top wall rod (624) is fixedly connected to the movable plate (621) via the third hand screw (623), and a stopper (624) is fixedly connected to the outer end of the top wall rod (624). 25), the stopper (625) is located outside the flange (3), and a pressure sensor (626) is embedded on the side of the stopper (625) close to the flange (3), the pressure sensor (626) is in contact with the outside of the flange (3), the top wall rod (624) passes through the center hole of the flange (3) and extends into the end tube of the flow meter body (2), and the outer end of the top wall rod (624) is in contact with the inner wall of the center hole of the flange (3) and the inner wall of the end tube of the flow meter body (2); An extension plate (612) is integrally formed and connected to the bottom of one side of the single-side open hollow cylinder (61), a slide groove (613) is provided on the extension plate (612), and a slider (631) is integrally formed and connected to the bottom of one side of the conical block (63), and the slider (631) is slidably connected inside the slide groove (613); The outer end of the single-side open hollow cylinder (61) is fixedly connected to a plurality of first rectangular sleeves (611), the movable plate (621) passes through the first rectangular sleeve (611), and the parts of the plurality of movable plates (621) located inside the single-side open hollow cylinder (61) are commonly connected to an elastic ring (65), and the corners of one side of the movable plate (621) close to the single-side open hollow cylinder (61) are chamfered; The traction mechanism (7) includes a sleeve (71), one side of the sleeve (71) is movably connected to a second threaded seat (72), the sleeve (71) and the second threaded seat (72) are both sleeved on the outer end of the first threaded rod (55), and the sleeve (71) and the second threaded seat (72) are respectively slidably connected and threadedly connected to the first threaded rod (55), the outer end of the sleeve (71) is fixedly connected to a plurality of second rectangular sleeves (73), a traction arm (75) is plugged into the second rectangular sleeve (73), a fourth hand screw (74) is threadedly connected to the side of the second rectangular sleeve (73), and the second rectangular sleeve (73) and the traction arm (75) are fixedly connected by the fourth hand screw (74). The traction arm (75) is composed of a first L-shaped rod (751), a second L-shaped rod (752) and a second electric push rod (753). The first L-shaped rod (751) and the second L-shaped rod (752) are plug-connected, and the second electric push rod (753) is fixedly connected to the inner side of the plug-in portion of the first L-shaped rod (751) and the second L-shaped rod (752). A scale line (76) is processed on the outer side of a section where the first L-shaped rod (751) and the second rectangular sleeve (73) are plugged in. An insert block (77) is fixedly connected to the inner side of the end of the second L-shaped rod (752). The flange (3) is located between the plurality of traction arms (75), and the insert block (77) passes through the bolt hole of the flange (3).

2. The flange welding device for a Coriolis mass flowmeter according to claim 1, characterized in that: The movable seat (4) comprises a movable plate (41) and a first electric push rod (42), wherein the movable plate (41) is slidably connected to the top of the operating table (1), and the first electric push rod (42) is fixedly connected to the top of the operating table (1). The first electric push rod (42) is located on a side of the movable plate (41) away from the flow meter body (2), and the piston rod end of the first electric push rod (42) is fixedly connected to one side of the movable plate (41).

3. The flange welding device for a Coriolis mass flowmeter according to claim 2, characterized in that: The adapter mounting seat (5) further comprises a first connecting plate (51) and a second connecting plate (52), wherein the second connecting plate (52) is slidably connected to the top of the first connecting plate (51), two rectangular telescopic brackets (54) distributed on the left and right are fixedly connected between the first connecting plate (51) and the movable plate (41), a first hand screw (53) is threadedly connected at the center of the bottom of the first connecting plate (51), and the first hand screw (53) is used to fix the position of the second connecting plate (52) on the first connecting plate (51), the first threaded rod (55) is located above the second connecting plate (52), and two fixed brackets (56) distributed on the left and right are fixedly connected between the second connecting plate (52) and the first threaded rod (55).

4. The flange welding device for a Coriolis mass flowmeter according to claim 1, characterized in that: A limiting block (711) is integrally formed on the inner side wall of the sleeve (71), a limiting groove (551) is provided at the outer end of the first threaded rod (55), the limiting block (711) is located inside the limiting groove (551), and the sleeve (71) is connected to the first threaded rod (55) in a limiting sliding manner via the limiting block (711) and the limiting groove (551).

5. The flange welding device for a Coriolis mass flowmeter according to claim 1, characterized in that: A fixing seat (8) is fixedly installed at the top center of the operating table (1), and the fixing seat (8) is used to fix the flow meter body (2); The fixing seat (8) includes a base (81), the base (81) is fixedly connected to the top of the operating table (1), an arc-shaped support block (82) is fixedly connected to the center of the top of the base (81), U-shaped plates (83) are fixedly connected to both sides of the top of the base (81), and two clamping mechanisms (84) distributed on the left and right are connected through the front and back sides of the U-shaped plate (83); The clamping mechanism (84) comprises a second threaded rod (841), the second threaded rod (841) passes through the U-shaped plate (83), and the second threaded rod (841) and the U-shaped plate (83) are threadedly connected, one end of the second threaded rod (841) located outside the U-shaped plate (83) is fixedly connected to a rotating wheel (842), and one end of the second threaded rod (841) located inside the U-shaped plate (83) is movably connected to a hard plate (843), and an arc-shaped clamping block (844) is fixedly connected to the inside of the hard plate (843).

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