Built-in motor valve of ultrasonic gas meter

Abstract

The utility model discloses an ultrasonic gas meter built-in motor valve which comprises a valve body, a valve seat, a valve cover, a motor, a gear assembly, a nut, a sealing gasket and a screw rod, the gear assembly comprises a first gear and a second gear, the first gear is connected to the output end of the motor in a sleeved mode, the second gear is connected to one end of the screw rod in a sleeved mode, and the nut is arranged on the valve cover. A speed regulation assembly is arranged between the first gear and the second gear and comprises a rotating rod and a linkage gear, the linkage gear is arranged on the rotating rod and comprises a linkage rod, a lower gear and an upper gear, one end of the linkage rod is arranged on the rotating rod, and the other end of the linkage rod is arranged on the lower gear. The upper gear and the lower gear are connected to the peripheral side of the linkage rod in a sleeving mode, the upper gear is located above the lower gear, the lower gear is meshed with the first gear, and the upper gear is meshed with the second gear. The motor valve has the effect of improving the adaptability of the motor valve.

Description

Technical Field

[0001] The present application relates to the technical field of gas valves, and in particular to a built-in motor valve for an ultrasonic gas meter. Background Art

[0002] Smart gas meters usually use motor valves as actuators to control the opening and closing of the gas meter; the motor valves on the market mainly include a valve body, a valve cover, a motor, a screw, a nut, a sealing gasket and a reduction gear set. The reduction gear set includes a driving gear and a driven gear. The driving gear is sleeved and fixed on the output end of the motor, and the driven gear is sleeved and fixed on one end of the screw. Under the mutual engagement of the driving gear and the driven gear, the motor drives the screw to rotate, and then the sealing gasket is driven to move under the interaction between the screw and the nut. In this process, since the speed of the motor remains unchanged, the speed of the screw will not change either, and then the sealing gasket will move away from the air outlet. However, when the working conditions of the motor valve change, the movement rate of the sealing gasket needs to be changed to adapt to different working conditions. In order to solve the above problems, a built-in motor valve for an ultrasonic gas meter is provided. Utility Model Content

[0003] The purpose of the utility model is to provide a built-in motor valve for an ultrasonic gas meter in view of the defects and shortcomings of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] It includes a valve body, a valve seat, a valve cover, a motor, a gear assembly, a nut, a sealing gasket and a screw, the gear assembly includes a first gear and a second gear, the first gear is sleeved on the output end of the motor, the second gear is sleeved on one end of the screw, a speed regulating assembly is arranged between the first gear and the second gear, the speed regulating assembly includes a rotating rod and a linkage gear, one end of the rotating rod is sleeved and rotated on the peripheral side of the output end of the motor, the linkage gear is arranged on the rotating rod, the linkage gear includes a linkage rod, a lower gear and an upper gear, one end of the linkage rod is arranged on the rotating rod, the upper gear and the lower gear are respectively sleeved on the peripheral side of the linkage rod, the upper gear is located above the lower gear, the lower gear and the first gear are meshed with each other, and the upper gear and the second gear are meshed with each other.

[0006] Preferably, a tension spring is provided on the side wall of the rotating rod, one end of the tension spring is provided on the side wall of the rotating rod, and the other end of the tension spring is provided on the side wall of the valve seat. The tension spring drives the rotating rod to rotate so that the upper gear and the second gear are stably engaged with each other.

[0007] Preferably, the cross section of the linkage rod is polygonal.

[0008] Preferably, a trapezoidal groove is provided on the side wall of the rotating rod, and a trapezoidal block is provided at the lower end of the linkage rod, and the trapezoidal block is inserted and slidably moved in the trapezoidal groove.

[0009] Preferably, compression springs are provided on the side walls of the trapezoidal block and the trapezoidal groove, and the compression springs drive the trapezoidal block to slide in the trapezoidal groove, so that the lower gear and the first gear are stably engaged with each other.

[0010] Preferably, a through hole is formed on the side wall of the valve seat, and the outer end of the rotating rod passes through the through hole.

[0011] Preferably, a limit block is provided on the side wall of the through hole, and the limit block can limit the rotation of the rotating rod.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. Before installing the motor valve in the gas meter, if you need to change the speed of the screw to adapt to different working conditions, you can replace the upper gear and the lower gear, insert the selected upper gear and lower gear into the linkage rod respectively, and then the trapezoidal block at the lower end of the linkage rod slides in the trapezoidal groove until the lower gear is engaged with the first gear. Then the compression spring allows the lower gear to be stably engaged with the first gear, and then the tension spring drives the rotating rod to rotate until the upper gear is engaged with the second gear. Thus, the first gear drives the second gear to rotate through the transmission of the upper gear and the lower gear, so that the speed of the screw rotates under the drive of the linkage gear. The speed of the screw will change according to the replacement of the linkage gear model, so that it can adapt to different working conditions and improve the adaptability of the motor valve.

[0014] 2. When the motor valve does not need to work, the outer end of the rotating rod can be moved to allow the rotating rod to move in the through hole. Then the side wall of the rotating rod is engaged with the limit block, so that the upper gear and the second gear are disengaged. The motor valve will not work due to accidental pressing, thereby improving the safety of the motor valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the motor valve of the utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a schematic diagram of the structure of the internal drive device of the motor valve of the utility model;

[0018] Figure 4 It is an exploded schematic diagram of the gear assembly and the adjustment assembly of the utility model.

[0019] In the figure: 1. Valve body; 2. Valve seat; 3. Valve cover; 4. Motor; 5. Gear assembly; 6. Nut; 7. Sealing gasket; 8. Screw; 9. Air inlet; 10. Air outlet; 11. Anti-theft net; 12. First gear; 13. Second gear; 14. Speed ​​control assembly; 15. Rotating rod; 16. Linkage gear; 17. Linkage rod; 18. Upper gear; 19. Lower gear; 20. Trapezoidal block; 21. Trapezoidal groove; 22. Compression spring; 23. Tension spring; 24. Through hole; 25. Limit block. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] The embodiment of the present application discloses a built-in motor valve for an ultrasonic gas meter.

[0022] Reference Figure 1 and Figure 3 , including a valve body 1, a valve seat 2, a valve cover 3, a motor 4, a gear assembly 5, a nut 6, a sealing gasket 7 and a screw 8. One end of the valve body 1 has an air inlet 9, and the upper side of the valve body 1 has an air outlet 10. The outer end of the air outlet 10 of the valve body 1 is fixed with an anti-theft net 11, the sealing gasket 7 abuts the inner end of the air outlet 10, one end of the nut 6 is fixed to the lower end surface of the sealing gasket 7, the lower end of the nut 6 is inserted and slid in the lower side wall of the valve body 1, the screw 8 is rotatably connected in the valve seat 2, and the screw 8 is threadedly connected in the nut 6. The motor 4 is installed on the lower end surface of the valve seat 2, the valve cover 3 covers the motor 4 and is fixed on the valve seat 2, the output end of the motor 4 passes through the side wall of the valve seat 2 and is located in the valve seat 2. The gear assembly 5 includes a first gear 12 and a second gear 13. The first gear 12 is sleeved and fixed to the output end of the motor 4, and the second gear 13 is sleeved and fixed to the lower end of the screw 8.

[0023] A speed regulating assembly 14 is placed between the first gear 12 and the second gear 13. The speed regulating assembly 14 includes a rotating rod 15 and a linkage gear 16. The linkage gear 16 includes a linkage rod 17, an upper gear 18 and a lower gear 19. One end of the rotating rod 15 is rotatably connected to the peripheral side of the output end of the motor 4. The rotating rod 15 is located below the first gear 12. One end of the linkage rod 17 is vertically placed on the rotating rod 15. The vertical cross-section of the linkage rod 17 is square. The upper gear 18 and the lower gear 19 are respectively sleeved and fixed on the peripheral side of the linkage rod 17. The upper gear 18 is located above the lower gear 19. The upper gear 18 and the second gear 13 are meshed with each other, and the lower gear 19 and the first gear 12 are meshed with each other.

[0024] Reference Figure 4The lower end of the linkage rod 17 is integrally provided with a trapezoidal block 20. The linkage rod 17 is rotatably connected to the trapezoidal block 20. The upper side wall of the rotating rod 15 is provided with a trapezoidal groove 21 along the length of the rotating rod 15. The trapezoidal block 20 is inserted and slidably inserted into the trapezoidal groove 21. A compression spring 22 is placed horizontally between the trapezoidal block 20 and the trapezoidal groove 21. One end of the compression spring 22 abuts the side wall of the trapezoidal block 20, and the other end of the compression spring 22 abuts the side of the trapezoidal groove 21 away from the first gear 12. Under the push of the compression spring 22, the lower gear 19 can be stably engaged with the first gear 12.

[0025] A tension spring 23 is placed on the side wall of the rotating rod 15. One end of the tension spring 23 is hooked on the side wall of the rotating rod 15, and the other end of the tension spring 23 is hooked on the inner wall of the valve seat 2. The selected upper gear 18 and lower gear 19 are respectively inserted into the linkage rod 17. Then, the trapezoidal block 20 at the lower end of the linkage rod 17 slides within the trapezoidal groove 21 until the lower gear 19 meshes with the first gear 12. The compression spring then stabilizes the meshing of the lower gear 19 and the first gear 12. The tension spring 23 then drives the rotating rod 15 to rotate until the upper gear 18 meshes with the second gear 13.

[0026] Reference Figure 2 The side wall of the valve seat 2 is provided with a through hole 24, through which the outer end of the rotating rod 15 passes. A stop block 25 is integrally provided on the lower side wall of the through hole 24. The stop block 25 is in the shape of a right triangle. When the motor 4 valve is not in operation, the outer end of the rotating rod 15 can be moved to allow the rotating rod 15 to move within the through hole 24. The side wall of the rotating rod 15 then engages with the stop block 25, causing the upper gear 18 to disengage from the second gear 13. Since the stop block 25 is in the shape of a right triangle, when the rotating rod 15 rotates, it will slide along the inclined surface of the stop block 25 until it crosses the stop block 25 and abuts against the side wall of the stop block 25.

[0027] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. An ultrasonic gas meter with a built-in motor valve, comprising a valve body (1), a valve seat (2), a valve cover (3), a motor (4), a gear assembly (5), a nut (6), a sealing gasket (7) and a screw (8), wherein the gear assembly (5) comprises a first gear (12) and a second gear (13), wherein the first gear (12) is sleeved on the output end of the motor (4), and the second gear (13) is sleeved on one end of the screw (8), and wherein: A speed regulating assembly (14) is provided between the first gear (12) and the second gear (13). The speed regulating assembly (14) comprises a rotating rod (15) and a linkage gear (16). One end of the rotating rod (15) is sleeved and rotated on the peripheral side of the output end of the motor (4). The linkage gear (16) is provided on the rotating rod (15). The linkage gear (16) comprises a linkage rod (17), a lower gear (19) and an upper gear (18). One end of the linkage rod (17) is provided on the rotating rod (15). The upper gear (18) and the lower gear (19) are respectively sleeved on the peripheral side of the linkage rod (17). The upper gear (18) is located above the lower gear (19). The lower gear (19) and the first gear (12) are meshed with each other, and the upper gear (18) and the second gear (13) are meshed with each other.

2. The ultrasonic gas meter built-in motor valve according to claim 1, characterized in that: A tension spring (23) is provided on the side wall of the rotating rod (15), one end of the tension spring (23) is provided on the side wall of the rotating rod (15), and the other end of the tension spring (23) is provided on the side wall of the valve seat (2). The tension spring (23) drives the rotating rod (15) to rotate so that the upper gear (18) and the second gear (13) are stably engaged with each other.

3. The ultrasonic gas meter built-in motor valve according to claim 1, characterized in that: The cross section of the linkage rod (17) is polygonal.

4. The ultrasonic gas meter built-in motor valve according to claim 1, characterized in that: A trapezoidal groove (21) is provided on the side wall of the rotating rod (15), and a trapezoidal block (20) is provided at the lower end of the linkage rod (17). The trapezoidal block (20) is inserted and slidably moved in the trapezoidal groove (21).

5. The ultrasonic gas meter built-in motor valve according to claim 4, characterized in that: Compression springs (22) are provided on the side walls of the trapezoidal block (20) and the trapezoidal groove (21). The compression springs (22) drive the trapezoidal block (20) to slide in the trapezoidal groove (21), allowing the lower gear (19) and the first gear (12) to engage with each other stably.

6. The ultrasonic gas meter built-in motor valve according to claim 1, characterized in that: A through hole (24) is provided on the side wall of the valve seat (2), and the outer end of the rotating rod (15) passes through the through hole (24).

7. The ultrasonic gas meter with a built-in motor valve according to claim 6, characterized in that A limit block (25) is provided on the side wall of the through hole (24), and the limit block (25) can limit the rotation of the rotating rod (15).

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