Valve lead locking device and method of ultrasonic gas meter

Abstract

The invention relates to a valve lead locking device and method for an ultrasonic gas meter. The valve lead locking device comprises a base. The nut conveying device, the nut pushing device and the nut locking device are fixedly arranged on the base; the nut conveying device comprises a vibration disc used for screening and conveying nuts. The flow guide groove is connected with the vibration disc and used for conveying the nuts screened out of the vibration disc; the discharging part is communicated with the flow guide groove and is used for removing the accumulated nuts; the nut assembling device is simple in structure, through mutual cooperation of the nut conveying device, the nut pushing device and the nut locking device, the assembling automation degree of the whole nut, the valve binding post and the metering module binding post is high, the nut pushing device is used for pushing the nuts in sequence, and the assembling efficiency is improved. And then the nut is rotated and adsorbed into the adsorption head through the nut locking device, so that the nut is screwed into the valve binding post and the metering module binding post, and the assembly is smoother.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic gas meter accessories, and in particular relates to a valve lead locking device and method for an ultrasonic gas meter. Background Art

[0002] Ultrasonic gas meters are gradually replacing traditional mechanical gas flow meters and are widely used in gas flow detection due to their good stability, high measurement accuracy, wide range ratio, low maintenance rate, small pressure loss and easy installation.

[0003] The valves and metering modules in the ultrasonic gas meter are the core components of the ultrasonic gas meter. During the processing or process of the ultrasonic gas meter, the valves and metering modules need to be connected to the main control circuit board through wires, and the wires need to pass through the ultrasonic shell. The ultrasonic shell is provided with terminals. After the wires pass through the terminals, the terminals are locked with nuts to position and lock the wires. Usually, the process of connecting nuts with terminals is done manually. Manual assembly workers are boring, easily fatigued, and have high labor investment costs. At the same time, the product consistency is poor and other problems.

[0004] In view of the above problems, it is necessary to improve them. Summary of the invention

[0005] The object of the present invention is to provide a valve lead locking device and method for an ultrasonic gas meter with simple structure, ingenious design, precise positioning and high automation.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a valve lead locking device for an ultrasonic gas meter, comprising a base; a nut conveying device, a nut pushing device and a nut locking device fixed on the base; the nut conveying device comprises a vibrating plate for screening and conveying the nuts; a guide groove connected to the vibrating plate for conveying the nuts screened from the vibrating plate; and a discharge portion connected to the guide groove for removing accumulated nuts.

[0007] As a preferred solution of the present invention, the nut pushing device includes a horizontal plate and a support plate; the support plate is vertically fixed to the end of the horizontal plate, and the horizontal plate and the support plate are fixedly connected and formed as one piece.

[0008] As a preferred solution of the present invention, a driving cylinder is fixedly provided on one side of the support plate close to the vibration disk, and a guide seat is fixedly provided on the other side of the support plate. The top of the guide seat is connected to the discharge part, the top of the guide seat and the top of the support plate are on the same horizontal plane, and a distance is left between the bottom of the guide seat and the bottom of the support plate.

[0009] As a preferred solution of the present invention, a driving block is fixedly provided on the driving shaft of the driving cylinder; a nut push block is fixedly provided on the driving block, and the nut push block passes through the support plate and the guide seat in sequence, and the driving cylinder drives the nut push block to move along the length direction of the horizontal plate to push the nuts output by the discharge part to the position of the nut locking device.

[0010] As a preferred solution of the present invention, a material dividing groove with its opening facing the nut locking device is formed on the nut push block; a material dividing guide groove is formed at the front end of the material dividing groove, and the material dividing groove is connected to the material dividing guide groove.

[0011] As a preferred solution of the present invention, guide slopes are formed on both sides of the opening end of the material distribution guide groove, and the guide slopes on both sides are in a trumpet-shaped structure.

[0012] As a preferred solution of the present invention, the nut push block is vertically arranged to the discharge portion.

[0013] As a preferred solution of the present invention, the nut locking device includes a locking positioning plate, a locking connecting seat fixedly arranged on the locking positioning plate, a Z-axis servo motor fixedly arranged at the bottom of the locking connecting seat, and a mounting block fixedly arranged at the top of one end of the locking connecting seat close to the Z-axis servo motor; a stop block is fixedly arranged at the other end of the locking connecting seat; a rotating shaft is connected between the mounting block and the stop block; a sliding block is slidably connected to the rotating shaft; and the rotating shaft is driven to rotate by the Z-axis servo motor.

[0014] As a preferred solution of the present invention, a support block is vertically fixedly provided on the top of the slider close to the Z-axis servo motor, and an intelligent electric screwdriver is fixedly provided on the support block. The intelligent electric screwdriver is arranged corresponding to the Z-axis servo motor.

[0015] As a preferred solution of the present invention, the spindle of the smart electric screwdriver passes through the support block to connect to the adsorption mechanism; the spindle of the smart electric screwdriver used to drive the nut to rotate extends into the adsorption mechanism to control the torque size and the number of locking turns of the nut.

[0016] As a preferred solution of the present invention, the adsorption mechanism includes a sleeve, a vacuum nozzle seat and an adsorption head; the sleeve is sleeved on the main shaft, and the vacuum nozzle seat is connected to the sleeve; an adsorption cavity matching the outer end of the nut is formed in the adsorption head.

[0017] As a preferred solution of the present invention, a vacuum air nozzle is connected to the vacuum nozzle seat, and the vacuum air nozzle is connected to a vacuum pump.

[0018] A method for locking a valve lead of an ultrasonic gas meter, the steps are as follows: Step 1: using a conveying mechanism to convey and position the valve terminal on the gas meter workpiece to be processed; Step 2: using a nut conveying device to arrange and convey a plurality of nuts in an orderly manner; Step 3: The nuts screened from the vibrating plate are conveyed through the provided guide groove; Step 4: By rotating the nut locking device and opening the vacuum air nozzle at the same time, the nut is sucked from the material distribution groove of the nut push block into the adsorption head; Step 5: The Z-axis servo motor drives the slider to move, so that the nut locking device is retracted from the material distribution trough, and the nut push block returns through the driving cylinder; Step 6: Manually pass the wire through the nut and place the wire inside the adsorption chamber; Step 7: The Z-axis servo motor drives the slider to move, and moves the adsorption head of the adsorption mechanism to the valve terminal, so that the nut is aligned with the external thread of the valve terminal. The intelligent electric screwdriver controls the spindle to rotate according to the set program, thereby screwing the nut into the valve terminal; Step 8: Using a conveying mechanism to convey and position the metering module terminal on the gas meter workpiece to be processed; Step 9: Repeat steps 2 to 6; Step 10: The Z-axis servo motor drives the slider to move, and moves the adsorption head of the adsorption mechanism to the terminal of the metering module, so that the nut is aligned with the external thread of the terminal of the metering module. The intelligent electric screwdriver controls the spindle to rotate according to the set program, thereby screwing the nut into the terminal of the metering module; Step 11: The Z-axis servo motor drives the slider to move, so that the entire adsorption mechanism is reset; Step 12: Use the conveying mechanism to move the processed gas meter workpiece to the next process.

[0019] The beneficial effects of the present invention are: The present invention has a simple structure. By arranging the mutual cooperation among the nut conveying device, the nut pushing device and the nut locking device, the assembly automation degree of the entire nut and the valve terminal and the metering module terminal is high, and the characteristics of the nut structure are fully utilized. A plurality of nuts are arranged and conveyed in an orderly manner in the nut conveying device, and the nut pushing device is used to push the nuts in sequence, and then the nut locking device is used to rotate the nuts and adsorb them into the adsorption head, so that the nuts are screwed into the valve terminal and the metering module terminal, so that the assembly is smoother; the action is simple to implement, the positioning is accurate, fast and reliable, and the assembly consistency is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a valve lead locking device of an ultrasonic gas meter according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the conveying mechanism according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the assembly of a nut pushing device and a nut locking device according to an embodiment of the present invention; Figure 4 For the embodiment of the present invention Figure 3 A partial enlarged view of the A direction; Figure 5 This is a diagram showing the use status of the nut locking device according to an embodiment of the present invention; The accompanying drawings are numerals in the figure: nut conveying device 1, nut pushing device 2, nut locking device 3, base 4, adsorption mechanism 5, conveying mechanism 6, valve terminal 7, metering module terminal 8, wire 9, vibration plate 10, guide groove 11, discharge part 12, horizontal plate 20, support plate 21, drive shaft 22, drive block 23, nut pushing block 24, guide seat 25, drive cylinder 26, dividing groove 27, dividing guide groove 28, guide slope 28-1, locking positioning plate 30, locking connecting seat 31, Z-axis servo motor 32, mounting block 33, stopper 34, rotating shaft 35, slide block 36, support block 40, intelligent electric screwdriver 41, spindle 42, sleeve 50, vacuum nozzle seat 51, adsorption head 52, vacuum air nozzle 53, adsorption chamber 54, nut 100, gas meter workpiece 300. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example: like Figure 1 As shown, Figure 1It is a structural schematic diagram of the valve lead locking device of the ultrasonic gas meter according to an embodiment of the present invention; a valve lead locking device of the ultrasonic gas meter comprises a base 4; a nut conveying device 1, a nut pushing device 2 and a nut locking device 3 fixedly arranged on the base 4; the nut conveying device 1 comprises a vibrating plate 10 for screening and conveying nuts 100; a guide groove 11 connected to the vibrating plate 10 for conveying the nuts 100 screened from the vibrating plate 10; a discharge portion 12 connected to the guide groove 11 for removing accumulated nuts 100.

[0024] The present invention has a simple structure. By setting the mutual cooperation among the nut conveying device 1, the nut pushing device 2 and the nut locking device 3, the assembly automation degree of the entire nut 100 with the valve terminal 7 and the metering module terminal 8 is high, and the structural characteristics of the nut 100 are fully utilized. A plurality of nuts 100 are arranged and conveyed in order on the nut conveying device 1, and the nut pushing device 2 is used to push the nuts 100 in sequence, and then the nuts are rotated and adsorbed into the adsorption head through the nut locking device 3, so that the nut 100 is screwed into the valve terminal 7 and the metering module terminal 8, so that the assembly is smoother; the action is simple to implement, the positioning is accurate, fast and reliable, and the assembly consistency is good.

[0025] like Figure 2-3 As shown, Figure 2 This is a schematic diagram of the structure of the conveying mechanism according to an embodiment of the present invention; Figure 3 It is an assembly diagram of the nut pushing device and the nut locking device of an embodiment of the present invention; specifically, the nut pushing device 2 includes a horizontal plate 20 and a support plate 21; the support plate 21 is vertically fixed to the end of the horizontal plate 20, and the horizontal plate 20 and the support plate 21 are fixedly connected and integrally formed; the structural strength and overall firmness of the entire nut pushing device 2 are improved, and the safety of use is further ensured.

[0026] A driving cylinder 26 is fixedly provided on one side of the support plate 21 close to the vibration disk 10, and a guide seat 25 is fixedly provided on the other side of the support plate 21. The top of the guide seat 25 is connected to the discharge portion 12, and the top of the guide seat 25 and the top of the support plate 21 are on the same horizontal plane, and there is a distance between the bottom of the guide seat 25 and the bottom of the support plate 21; this distance allows the conveying mechanism 6 to be located at the bottom of the guide seat 25, so that in the process of the driving cylinder 26 driving the nut push block 24 to move, the stability and safety of the push are improved.

[0027] A driving block 23 is fixed on the driving shaft 22 of the driving cylinder 26; a nut pushing block 24 is fixed on the driving block 23, and the nut pushing block 24 passes through the support plate 21 and the guide seat 25 in sequence. The driving cylinder 26 drives the nut pushing block 24 to move along the length direction of the horizontal plate 20, so as to push the nut 100 output by the discharge part 12 to the position of the nut locking device 3; a nut pushing device 2 is provided, so as to push the nut 100 output by the discharge part 12 to the designated area. The nut pushing device 2 can realize fully automatic pushing, improve the nut pushing efficiency, reduce labor costs, and is easy to operate.

[0028] like Figure 4 As shown, Figure 4 For the embodiment of the present invention Figure 3 A partial enlarged view in the direction of A; a material distribution groove 27 with an opening toward the nut locking device 3 is formed on the nut push block 24; a material distribution guide groove 28 is formed at the front end of the material distribution groove 27, and the material distribution groove 27 is connected to the material distribution guide groove 28.

[0029] Among them, the inner diameter of the dividing groove 27 matches the outer diameter of the nut 100. It should be said that the inner diameter of the dividing groove 27 is slightly larger than the outer diameter of the nut 100, and the height of the dividing groove 27 corresponds to the outer diameter of the nut 100. This allows the nut 100 to fall from the discharge part 12 into the dividing groove 27 of the nut push block 24, with the characteristic of accurate positioning.

[0030] The material distribution guide groove 28 is provided to facilitate the adsorption of the nut 100 by the adsorption head 52 of the nut locking device 3, so as to improve the assembly efficiency; guide slopes 28-1 are formed on both sides of the open end of the material distribution guide groove 28, and the guide slopes 28-1 on both sides are in a trumpet-shaped structure; the above scheme makes it more convenient to adsorb the nut 100 located in the material distribution groove 27 through the adsorption head 52, increases the contact area between the adsorption head 52 and the guide slope 28-1, and makes adsorption and movement safer.

[0031] The nut push block 24 is arranged perpendicular to the discharge portion 12; that is, the driving direction of the driving cylinder 26 is perpendicular to the discharge portion 12 and intersects at the guide seat 25 to accurately push the nut at the end of the discharge portion 12 to the designated area.

[0032] like Figure 5 As shown, Figure 5It is a usage status diagram of the nut locking device of an embodiment of the present invention; the nut locking device 3 includes a locking positioning plate 30, a locking connecting seat 31 fixedly arranged on the locking positioning plate 30, a Z-axis servo motor 32 is fixedly arranged at the bottom of the locking connecting seat 31, and a mounting block 33 is fixedly arranged at the top of one end of the locking connecting seat 31 close to the Z-axis servo motor 32; a stopper 34 is fixedly arranged at the other end of the locking connecting seat 31; a rotating shaft 35 is connected between the mounting block 33 and the stopper 34; a sliding block 36 is slidably connected to the rotating shaft 35; the rotating shaft 35 is driven to rotate by the Z-axis servo motor 32.

[0033] Specifically, a driving wheel 37 is installed on the Z-axis servo motor 32 , and the rotating shaft 35 passes through the mounting block 33 and is connected to a rotating wheel 38 . The driving wheel 37 and the rotating wheel 38 are connected via a belt 39 .

[0034] A support block 40 is vertically fixed to the top of the slider 36 near the Z-axis servo motor 32, and an intelligent electric screwdriver 41 is fixed to the support block 40. The intelligent electric screwdriver 41 is arranged corresponding to the Z-axis servo motor 32; the main shaft 42 of the intelligent electric screwdriver 41 passes through the support block 40 and is connected to the adsorption mechanism 5; the main shaft 42 of the intelligent electric screwdriver 41 is used to drive the nut 100 to rotate and extends into the adsorption mechanism 5 to control the torque size and the number of locking turns of the nut 100.

[0035] The adsorption mechanism 5 includes a sleeve 50, a vacuum nozzle seat 51 and an adsorption head 52; the sleeve 50 is sleeved on the main shaft 42, and the vacuum nozzle seat 51 is connected to the sleeve 50; an adsorption cavity 54 matching the outer end of the nut 100 is formed in the adsorption head 52; the torque and the number of locking circles of the nut 100 are controlled by the intelligent electric screwdriver 41 to control the locking depth of the nut 100 and improve the locking accuracy of the nut 100. Therefore, the present invention facilitates the control of the locking depth of the nut 100, thereby improving the locking accuracy of the nut 100, and due to the use of vacuum adsorption, there is no requirement for the material of the nut 100, and it is widely used.

[0036] A vacuum air nozzle 53 is connected to the vacuum nozzle seat 51, and the vacuum air nozzle 53 is connected to a vacuum pump; the nut 100 is adsorbed through the connection between the vacuum pump and the vacuum air nozzle 53. At the same time, an adsorption cavity 54 matching the outer end of the nut 100 is formed in the adsorption head 52. The adsorption cavity 54 is used to position the nut 100, thereby avoiding shaking of the nut 100 during the adsorption process, which affects the safety of movement.

[0037] A method for locking a valve lead of an ultrasonic gas meter, the steps are as follows: Step 1: using a conveying mechanism 6 to convey and position a valve terminal 7 on a gas meter workpiece 300 to be processed; Step 2: using a nut conveying device 1 to arrange and convey a plurality of nuts 100 in an orderly manner; Step 3: The guide groove 11 is provided to convey the nuts 100 screened from the vibration plate 10; Step 4: The nut locking device 3 is rotated and the vacuum air nozzle is opened at the same time to suck the nut 100 from the material distribution groove 27 of the nut push block 24 into the adsorption head 52; Step 5: The slide block 36 is driven to move by the Z-axis servo motor 32, so that the nut locking device 3 is retracted from the material distribution groove 27, and the nut push block 24 is returned by the driving cylinder 26; Step 6: Manually pass the wire 9 through the nut 100 and place the wire 9 inside the adsorption chamber 54; Step 7: The Z-axis servo motor 32 drives the slider 36 to move, and moves the adsorption head 52 of the adsorption mechanism 5 to the valve terminal 7, so that the nut 100 is aligned with the external thread of the valve terminal 7, and the intelligent electric screwdriver 41 controls the spindle 42 to rotate according to the set program, so as to screw the nut 100 into the valve terminal 7; Step eight: using the conveying mechanism 6 to convey and position the metering module terminal 8 on the gas meter workpiece 300 to be processed; Step 9: Repeat steps 2 to 6; Step 10: The Z-axis servo motor 32 drives the slider 36 to move, and moves the adsorption head 52 of the adsorption mechanism 5 to the terminal 8 of the metering module, so that the nut 100 is aligned with the external thread of the terminal 8 of the metering module, and the intelligent electric screwdriver 41 controls the spindle 42 to rotate according to the set program, so as to screw the nut 100 into the terminal 8 of the metering module; Step 11: The Z-axis servo motor 32 drives the slider 36 to move, so that the entire adsorption mechanism 5 is reset; Step 12: The conveying mechanism 6 is used to move the processed gas meter workpiece 300 to the next process.

[0038] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0039] Although this article uses more of the figure markings: nut conveying device 1, nut pushing device 2, nut locking device 3, base 4, adsorption mechanism 5, conveying mechanism 6, valve terminal 7, metering module terminal 8, wire 9, vibration plate 10, guide groove 11, discharge part 12, horizontal plate 20, support plate 21, drive shaft 22, drive block 23, nut push block 24, guide seat 25, drive cylinder 26, material distribution groove 27, material distribution guide groove 28, guide slope 28-1, locking positioning plate 30, locking connecting seat 31, Z-axis servo motor 32, mounting block 33, stopper 34, rotating shaft 35, slide block 36, support block 40, intelligent electric screwdriver 41, spindle 42, sleeve 50, vacuum nozzle seat 51, adsorption head 52, vacuum air nozzle 53, adsorption chamber 54, nut 100, gas meter workpiece 300 and other terms, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitations interpreted as them are contrary to the spirit of the present invention.

Claims

1. A valve lead locking device for an ultrasonic gas meter, Features: It comprises a base (4); a nut conveying device (1), a nut pushing device (2) and a nut locking device (3) fixedly mounted on the base (4); The nut conveying device (1) comprises a vibrating plate (10) for screening and conveying nuts (100); A guide groove (11) connected to the vibration plate (10) and used for conveying nuts (100) screened from the vibration plate (10); A discharge portion (12) connected to the guide groove (11) and used for removing accumulated nuts (100); The nut pushing device (2) comprises a horizontal plate (20) and a support plate (21); the support plate (21) is vertically fixed to the end of the horizontal plate (20), and the horizontal plate (20) and the support plate (21) are fixedly connected and integrally formed; A driving cylinder (26) is fixedly provided on one side of the support plate (21) close to the vibration plate (10), and a guide seat (25) is fixedly provided on the other side of the support plate (21). The top of the guide seat (25) is connected to the discharge portion (12), the top of the guide seat (25) and the top of the support plate (21) are on the same horizontal plane, and a gap is left between the bottom of the guide seat (25) and the bottom of the support plate (21).

2. A valve lead locking device for an ultrasonic gas meter according to claim 1, Features: A driving block (23) is fixedly provided on the driving shaft (22) of the driving cylinder (26); a nut pushing block (24) is fixedly provided on the driving block (23); the nut pushing block (24) passes through the supporting plate (21) and the guide seat (25) in sequence; the driving cylinder (26) drives the nut pushing block (24) to move along the length direction of the horizontal plate (20) to push the nut (100) outputted from the discharging portion (12) to the position of the nut locking device (3).

3. The valve lead locking device of an ultrasonic gas meter according to claim 2, Features: The nut push block (24) is formed with a material distribution groove (27) whose opening faces the nut locking device (3); a material distribution guide groove (28) is formed at the front end of the material distribution groove (27), and the material distribution groove (27) is connected to the material distribution guide groove (28); and guide inclined surfaces (28-1) are formed on both sides of the opening end of the material distribution guide groove (28), and the guide inclined surfaces (28-1) on both sides are horn-shaped structures.

4. The valve lead locking device of an ultrasonic gas meter according to claim 2, Features: The nut push block (24) is arranged vertically to the discharge portion (12).

5. The valve lead locking device of an ultrasonic gas meter according to claim 3, Features: The nut locking device (3) comprises a locking positioning plate (30), a locking connection seat (31) fixedly mounted on the locking positioning plate (30), a Z-axis servo motor (32) fixedly mounted on the bottom of the locking connection seat (31), a mounting block (33) fixedly mounted on the top of one end of the locking connection seat (31) close to the Z-axis servo motor (32); a stopper (34) fixedly mounted on the other end of the locking connection seat (31); a rotating shaft (35) connected between the mounting block (33) and the stopper (34); a sliding block (36) slidably mounted on the rotating shaft (35); and the rotating shaft (35) is driven to rotate by the Z-axis servo motor (32).

6. A valve lead locking device for an ultrasonic gas meter according to claim 5, Features: A support block (40) is vertically fixedly disposed on the top of the slider (36) near the Z-axis servo motor (32), and an intelligent electric screwdriver (41) is fixedly disposed on the support block (40). The intelligent electric screwdriver (41) is arranged corresponding to the Z-axis servo motor (32).

7. A valve lead locking device for an ultrasonic gas meter according to claim 6, Features: The main shaft (42) of the intelligent electric screwdriver (41) passes through the support block (40) and is connected to the adsorption mechanism (5); the main shaft (42) of the intelligent electric screwdriver (41) used to drive the nut (100) to rotate extends into the adsorption mechanism (5) to control the torque and number of locking turns of the nut (100).

8. The valve lead locking device of an ultrasonic gas meter according to claim 7, Features: The adsorption mechanism (5) comprises a sleeve (50), a vacuum suction nozzle seat (51) and an adsorption head (52); the sleeve (50) is sleeved on the main shaft (42), and the vacuum suction nozzle seat (51) is connected to the sleeve (50); an adsorption cavity (54) matching the outer end of the nut (100) is formed in the adsorption head (52).

9. The valve lead locking device of an ultrasonic gas meter according to claim 8, Features: The vacuum suction nozzle seat (51) is connected to a vacuum suction nozzle (53), and the vacuum suction nozzle (53) is connected to a vacuum pump.

10. A method for locking the valve lead wire of an ultrasonic gas meter. It is characterized in that The valve lead locking device applied to the ultrasonic gas meter according to any one of claims 1 to 9 comprises the following steps: Step 1: using a conveying mechanism (6) to convey and position a valve terminal (7) on a gas meter workpiece (300) to be processed; Step 2: using a nut conveying device (1) to arrange and convey the plurality of nuts (100) in an orderly manner; Step three: conveying the nuts (100) screened from the vibrating plate (10) through the provided guide groove (11); Step 4: By rotating the nut locking device (3) and opening the vacuum air nozzle at the same time, the nut (100) is sucked from the material distribution groove (27) of the nut push block (24) into the adsorption head (52); Step 5: The slide block (36) is driven to move by the Z-axis servo motor (32), so that the nut locking device (3) is retracted from the material distribution trough (27), and the nut push block (24) is returned by the driving cylinder (26); Step 6: manually passing the wire (9) through the nut (100) and placing the wire (9) inside the adsorption chamber (54); Step 7: The Z-axis servo motor (32) drives the slider (36) to move, and moves the adsorption head (52) of the adsorption mechanism (5) to the valve terminal (7), so that the nut (100) is aligned with the external thread of the valve terminal (7), and the intelligent electric screwdriver (41) controls the main shaft (42) to rotate according to the set program, so that the nut (100) is screwed into the valve terminal (7); Step eight: using a conveying mechanism (6) to convey and position the metering module terminal (8) on the gas meter workpiece (300) to be processed; Step 9: Repeat steps 2 to 6; Step 10: The Z-axis servo motor (32) drives the slider (36) to move, and moves the adsorption head (52) of the adsorption mechanism (5) to the metering module terminal (8), so that the nut (100) is aligned with the external thread of the metering module terminal (8), and the intelligent electric screwdriver (41) controls the main shaft (42) to rotate according to the set program, so that the nut (100) is screwed into the metering module terminal (8); Step 11: The Z-axis servo motor (32) drives the slider (36) to move, so that the entire adsorption mechanism (5) is reset; Step 12: Using a conveying mechanism (6) to move the processed gas meter workpiece (300) to the next process.

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