A wide flow safety type intelligent gas meter motor valve

Abstract

The present invention discloses a wide flow safety type intelligent gas meter motor valve, including a valve body, an air inlet and an air outlet are arranged on the valve body, a sealing member is installed in the valve body through spring movement; and a mounting bracket connected to the valve body and arranged outside the valve body, the mounting bracket is equipped with a motor, a gear set, a transmission screw and a transmission nut, the motor drives the transmission screw to rotate through the gear set, and then drives the transmission nut to reciprocate along the axial direction of the transmission screw, so that the sealing member cooperates with the opening and closing of the air outlet. The valve body of the present invention is isolated from the mounting bracket for mounting the motor, and is safer and more reliable to use.

Description

Technical Field

[0001] The invention belongs to the technical field of gas meter motor valves, and in particular relates to a wide-flow safety type intelligent gas meter motor valve. Background Art

[0002] Smart gas meters usually use motor valves as actuators to control the opening and closing of the gas meter. The structure of the current common smart gas meter motor valve mainly includes a valve body, a valve seat, a valve cover, a motor, a reduction gear set, a screw, a nut and a sealing cover. The valve body is fixedly connected to the valve seat through the valve cover, and the motor and the reduction gear set are correspondingly installed in the valve seat. The top of the screw is connected to the sealing cover through the nut, and the bottom of the screw passes through the valve cover and is connected to the reduction gear set. The top of the valve body is provided with a valve port corresponding to the sealing cover. During operation, the motor drives the screw to rotate through the reduction gear set, so that the screw and the nut move relative to each other, and then drives the sealing cover to move along the axial direction of the screw, thereby achieving the effect of controlling the opening and closing of the valve port.

[0003] See Chinese patent No. 201721146419.3, which discloses a gas meter motor valve, the sealing cover of which is an integrated structure, the upper end of the sealing cover cooperates with the air outlet for opening and closing the air outlet, and the lower end of the sealing cover is fixedly arranged in the reduction gear box for sealing the gear box. This integrated sealing cover is fixed at one end and moves with the screw at the other end, so that the sealing cover will expand and contract once the valve is opened and closed, making the sealing cover easily damaged when it is in a telescopic state for a long time, affecting its service life. In addition, when the sealing cover is opened and closed, positive pressure and negative pressure are generated due to changes in the shape and volume of the sealing cover, which changes the resistance and affects the valve action. To solve this problem, refer to Chinese patent No. 201821222095.1, which discloses a gas meter motor valve. The sealing cover of the motor is a split structure. When the valve is closed, the motor drives the screw to rotate through the transmission gear assembly. The rotation of the screw causes the nut to move relative to the screw. The movement of the nut drives the first seal to move to the air outlet and tightly cooperate with the air outlet, thereby blocking the air outlet and closing the air outlet. When the valve is opened, the motor drives the screw to rotate through the transmission gear assembly. The rotation of the screw causes the nut to move relative to the screw. The movement of the nut drives the first seal to move away from the air outlet, thereby opening the air outlet. The first seal and the second seal do not interfere with each other, thereby ensuring the service life of the first seal and the second seal. Moreover, the first seal is not easy to deform and will not affect the valve action.

[0004] However, the motor, gear box, transmission screw and transmission nut of the above-mentioned existing gas meter motor valve are isolated from the valve cavity of the valve body by a sealing bag. Regardless of whether the gas outlet of the valve body is closed, the transmission nut is always located in the valve cavity of the valve body, and the mounting parts of the motor and the gear set are integrated with the valve body. If the seal between the sealing bag and the transmission nut is damaged, it may cause safety problems in the use of the gas meter. Therefore, it is necessary to improve the valve body structure of the existing gas meter motor valve. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a wide flow safety type intelligent gas meter motor valve, wherein the valve body is isolated from the mounting bracket for mounting the motor, and the use is safer and more reliable.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is.

[0007] A wide flow safety type intelligent gas meter motor valve comprises a valve body, an air inlet and an air outlet are arranged on the valve body, a sealing member is installed in the valve body through spring movement; it also comprises a mounting bracket which is arranged outside the valve body and connected to the valve body, a motor, a gear set, a transmission screw and a transmission nut are installed on the mounting bracket, the motor drives the transmission screw to rotate through the gear set, and then drives the transmission nut to reciprocate along the axial direction of the transmission screw, so that the transmission nut drives the sealing member from the outside of the valve body to cooperate with the opening and closing of the air outlet.

[0008] Wherein, the valve body includes a valve seat and a valve cover arranged on the valve seat, the air inlet is arranged at the lower end of the valve seat, and the air outlet is arranged at the upper end of the valve cover.

[0009] Furthermore, the sealing member includes a movable frame and a sealing cover coated on the movable frame, and the movable frame is arranged at a position of the valve seat corresponding to the air outlet through the spring.

[0010] Preferably, the mounting bracket is provided with a motor cavity for mounting the motor and a gear cavity for mounting the gear set, the motor cavity cover is provided with a motor cover, the gear cavity cover is provided with a gear cover, and an axial hole for the power supply motor shaft to pass through is provided on the mounting bracket at a position where the motor cavity and the gear cavity overlap.

[0011] Furthermore, a mounting post for the driving nut to extend out is arranged at a position of the gear cavity corresponding to the air outlet of the valve body, and a sealing bag which seals with the driving nut is arranged outside the mounting post.

[0012] Preferably, the gear set includes a driving gear, a transmission gear and a reduction gear, the driving gear is arranged on the motor shaft, the transmission gear is respectively meshed with the driving gear and the reduction gear, and the transmission screw is limitedly installed at the center of the reduction gear.

[0013] Furthermore, a mounting hole is provided at the center of the reduction gear, a stop block is provided along the periphery of the mounting hole, a protrusion which cooperates with the stop block in a limiting manner is provided on the circumference of the transmission screw, and a rotational gap is provided between the stop block and the protrusion.

[0014] Wherein, the mounting bracket is clamped with the valve body.

[0015] After adopting the above technical scheme, the advantages of the present invention compared with the prior art are:

[0016] The existing gas meter motor valve motor, gear set, transmission screw, transmission nut and sealing cover are all installed based on the valve body, so that the sealing cover and the driving component that controls the opening and closing of the sealing cover are placed inside the valve body and are in contact with the gas for a long time, which is easily corroded by the gas and causes electrical safety problems. The present invention improves the existing integrated valve body structure. Specifically, the valve body and the mounting bracket are connected as a whole, wherein the valve body is only used to install the sealing cover that is tightly matched with the gas outlet, and the motor, gear set, transmission screw, transmission nut and other driving components are integrated and installed on the mounting bracket, so that the driving component controls the opening and closing of the sealing cover and the gas outlet from the outside of the valve body. When the sealing cover closes the gas outlet of the valve body, the driving component is located outside the valve body as a whole, avoiding the transmission nut and the sealing bag and other components from being in direct contact with the gas for a long time, making the use of the gas meter motor valve safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the decomposition structure of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the mounting bracket of the present invention.

[0021] Figure 4 It is a schematic diagram of the assembly structure of the transmission screw and the reduction gear of the present invention.

[0022] In the figure, 1. valve body, 1a. air inlet, 1b. air outlet, 11. valve seat, 12. valve cover, 2. mounting bracket, 21. shaft hole, 22. mounting column, 23. sealing capsule, 3. motor, 31. motor cover, 41. driving gear, 42. transmission gear, 43. reduction gear, 431. mounting hole, 432. stopper, 44. gear cover, 5. transmission screw, 51. bump, 6. transmission nut, 7. spring, 81. movable frame, and 82. sealing cover. DETAILED DESCRIPTION

[0023] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

[0024] See also Figures 1 to 4 A wide flow safety type smart gas meter motor valve comprises a valve body 1, on which an air inlet 1a and an air outlet 1b are arranged. The valve body 1 comprises a valve seat 11 and a valve cover 12 covered on the valve seat 11. The air inlet 1a is arranged at the lower end of the valve seat 11, and the air outlet 1b is arranged at the upper end of the valve cover 12. The air inlet 1a and the air outlet 1b are staggered, which can play an anti-theft role and at the same time make the gas channel have a wider flow cross-section, which can reduce the pressure loss of the gas flowing through the valve body 1.

[0025] A seal is movably installed in the valve body 1 through a spring 7, and the seal includes a movable skeleton 81 and a sealing cover 82 covered on the movable skeleton 81. The movable skeleton 81 is set at a position of the valve seat 11 corresponding to the air outlet 1b through the spring 7. Under normal conditions, the sealing cover 82 is subjected to the elastic force of the spring 7 and abuts against the air outlet 1b of the valve body 1 to close the air outlet 1b.

[0026] It also includes a mounting bracket 2 that is arranged outside the valve body 1 and connected to the valve body 1. The mounting bracket 2 is snap-fitted with the valve body 1. The mounting bracket 2 is mounted with a motor 3, a gear set, a transmission screw 5 and a transmission nut 6. Specifically, the mounting bracket 2 is provided with a motor cavity for mounting the motor 3 and a gear cavity for mounting the gear set. The motor cavity cover is provided with a motor cover 31, and the gear cavity cover is provided with a gear cover 44. The mounting bracket 2 is provided with an axial hole 21 through which the rotating shaft of the power supply machine 3 passes, at a position where the motor cavity and the gear cavity overlap. The gear set includes a driving gear 41, a transmission gear 42 and a reduction gear 43. The driving gear 41 is arranged on the rotating shaft of the motor 3, and the transmission gear 42 is meshed with the driving gear 41 and the reduction gear 43 respectively.

[0027] A mounting hole 431 is provided at the center of the reduction gear 43, and a stop block 432 is provided along the periphery of the mounting hole 431 of the reduction gear 43. The transmission screw 5 extends out of the reduction gear 43 from the mounting hole 431, wherein the transmission screw 5 and the motor 3 are located on the same side of the mounting bracket 2, which can reduce the assembly space of the mounting bracket 2, and the gear cavity is provided with a mounting column 22 for the transmission nut 6 to extend out at a position corresponding to the air outlet 1b of the valve body 1, and a sealing bag 23 is provided outside the mounting column 22 to seal with the transmission nut 6. The transmission screw 5 is circumferentially provided with a protrusion 51 that cooperates with the stop block 432 to limit the position. There is a rotation gap between the stop block 432 and the protrusion 51. The rotation gap can reduce the starting torque of the motor 3. When the motor 3 starts, it first drives only the gear set to rotate. When the stop block 432 of the reduction gear 43 hits the protrusion 51 of the transmission screw 5, it drives the sensor screw 5 to rotate and drives the transmission nut 6 to extend and retract. The transmission nut 6 abuts against the sealing cover 82 to enable the sealing cover 82 to cooperate with the air outlet 1b to open and close.

[0028] The gas meter motor valve connects the valve body 1 and the mounting bracket 2 separately into one body, wherein the valve body 1 is only used to install the sealing cover 82 which is tightly matched with the gas outlet 1b, and the driving components such as the motor 3, the gear set, the transmission screw 5, and the transmission nut 6 are integrated and installed on the mounting bracket 2, so that the driving component controls the opening and closing coordination of the sealing cover 82 and the gas outlet 1b from the outside of the valve body 1. When the sealing cover 82 closes the gas outlet 1b of the valve body 1, the driving component is located on the outside of the valve body 1 as a whole, so as to avoid long-term direct contact between the transmission nut 6 and the sealing bag 23 and other components and the gas, so that the gas meter motor valve is safer and more reliable to use.

[0029] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A wide flow safety type intelligent gas meter motor valve, comprising a valve body (1), the valve body (1) being provided with an air inlet (1a) and an air outlet (1b), characterized in that: A sealing member is movably mounted in the valve body (1) via a spring (7); the valve body (1) further comprises a mounting bracket (2) which is arranged outside the valve body (1) and connected to the valve body (1); a motor (3), a gear set, a transmission screw (5) and a transmission nut (6) are mounted on the mounting bracket (2); the motor (3) drives the transmission screw (5) to rotate via the gear set, thereby driving the transmission nut (6) to reciprocate along the axial direction of the transmission screw (5); The mounting bracket (2) is provided with a motor cavity for mounting the motor (3) and a gear cavity for mounting the gear set, the drive screw (5) and the motor (3) are located on the same side of the mounting bracket (2), and a mounting column (22) for the drive nut (6) to extend is provided at a position of the gear cavity corresponding to the air outlet (1b) of the valve body (1), and a sealing bag (23) is provided outside the mounting column (22) for sealingly cooperating with the drive nut (6); The sealing component comprises a movable frame (81) and a sealing cover (82) covered on the movable frame (81); the movable frame (81) is arranged at a position of the valve seat (11) corresponding to the air outlet (1b) through the spring (7); the driving nut (6) is telescopically abutted against the sealing cover (82) so that the driving nut (6) drives the sealing cover (82) from the outside of the valve body to open and close in coordination with the air outlet (1b).

2. A wide flow safety type intelligent gas meter motor valve according to claim 1, characterized in that: The valve body (1) comprises a valve seat (11) and a valve cover (12) disposed on the valve seat (11); the air inlet (1a) is disposed at the lower end of the valve seat (11), and the air outlet (1b) is disposed at the upper end of the valve cover (12).

3. The wide flow safety type intelligent gas meter motor valve according to claim 1, characterized in that: The motor cavity cover is provided with a motor cover (31), the gear cavity cover is provided with a gear cover (44), and the mounting bracket (2) is provided with an axial hole (21) through which the rotating shaft of the power supply machine (3) passes, at a position where the motor cavity and the gear cavity overlap.

4. The wide flow safety type intelligent gas meter motor valve according to claim 1, characterized in that: The gear set comprises a driving gear (41), a transmission gear (42) and a reduction gear (43); the driving gear (41) is arranged on the rotating shaft of the motor (3); the transmission gear (42) is meshed with the driving gear (41) and the reduction gear (43) respectively; and the driving screw (5) is limitedly mounted at the center of the reduction gear (43).

5. A wide flow safety type intelligent gas meter motor valve according to claim 4, characterized in that: A mounting hole (431) is provided at the center of the reduction gear (43), a stop block (432) is provided along the periphery of the mounting hole (431) of the reduction gear (43), a convex block (51) which is limitedly matched with the stop block (432) is provided in the circumferential direction of the transmission screw rod (5), and a rotational clearance is provided between the stop block (432) and the convex block (51).

6. A wide flow safety type intelligent gas meter motor valve according to claim 1, characterized in that: The mounting bracket (2) is snap-fitted to the valve body (1).

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