An ultrasonic gas meter with built-in valve

Abstract

This utility model relates to the field of valve technology, and in particular to an ultrasonic gas meter built-in valve. The actuator includes a drive motor, a transmission disc, and a drive component. The drive motor outputs a gear shaft. One end of the transmission disc has a recess, and the inner wall of the recess is surrounded circumferentially by internal teeth that mesh with the gear shaft. A transmission shaft is provided on the edge of the transmission disc near the outer peripheral wall. One end of the drive component extends radially with a toggle plate, and the other end has an external thread. The transmission disc drives the toggle plate to rotate through the transmission shaft. A linkage rod extends from the end of the valve core away from the valve seat. The linkage rod has an internal thread that mates with the external thread. A guide component is also sandwiched between the actuator and the valve body. The guide component is sleeved on the outside of the linkage rod, and the inner wall of the guide component has a guide groove extending axially. The outer wall of the linkage rod has a slider that slides within the guide groove. This utility model has the advantage of reducing the torque required for opening and closing and is suitable for large-diameter pipelines.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an ultrasonic gas meter built-in valve. Background Technology

[0002] Gas meters typically use an electric valve as the actuator to control the opening and closing of the gas meter. Its quality directly determines the service life of the gas meter. Inside the gas meter, a sealing structure and a control mechanism for the sealing structure are installed to control the opening or closing of the gas outlet, thereby realizing the valve switching.

[0003] Existing technology integrates a motor valve into an ultrasonic gas meter, which has the advantages of convenient transportation and installation. However, it also has the following problems: the torque required for opening and closing is relatively large, which means that the motor needs to have greater power and a matching power supply, making it unsuitable for large-diameter pipelines.

[0004] The purpose of this invention is to propose corresponding solutions to the aforementioned technical problems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an ultrasonic gas meter built-in valve. This invention has the advantage of reducing the torque required for opening and closing and is suitable for large-diameter pipelines.

[0006] The technical solution adopted by this utility model is as follows: An ultrasonic gas meter built-in valve includes a valve body, a valve core, and an actuator. The valve body is provided with a valve seat that seals with the valve core. The actuator includes a drive motor, a transmission disk, and a drive component. The drive motor outputs a gear shaft. One end of the transmission disk has a recess, and the inner wall of the recess is surrounded circumferentially with internal teeth that mesh with the gear shaft. A transmission shaft is provided on the edge of the transmission disk near the outer peripheral wall. One end of the drive component extends radially with a toggle plate, and the other end has an external thread. The transmission disk drives the toggle plate to rotate through the transmission shaft. The valve core extends a linkage rod from the end away from the valve seat. The linkage rod has an internal thread that mates with the external thread. A guide component is also sandwiched between the actuator and the valve body. The guide component is sleeved on the outside of the linkage rod, and the inner wall of the guide component has a guide groove extending axially. The outer wall of the linkage rod has a slider that slides within the guide groove.

[0007] The actuator also includes a housing and a cover. The housing includes a first housing for mounting the drive motor and a second housing for mounting the transmission disc. The outer peripheral walls of the first housing and the second housing are respectively provided with slots and protrusions. The cover is engaged with the slot of the first housing by a snap fastener. The valve body is slid into the protrusion of the second housing through a sliding groove to form a limiting fit.

[0008] The outer peripheral walls of the first housing and the second housing are respectively provided with a first stop block and a second stop block. The cover and the valve body are respectively provided with a first lever block and a second lever block. The outer walls of the first stop block and the second stop block are both arc surfaces, and the inner walls of the first lever block and the second lever block are both rounded surfaces adapted to the arc surfaces. When the side wall of the first lever block abuts against the side wall of the first stop block, the buckle engages with the slot. When the side wall of the second lever block abuts against the side wall of the second stop block, the protrusion slides into the slide groove to form a limiting fit.

[0009] A sealing diaphragm, which is sleeved on the outside of the linkage rod, is also sandwiched between the guide and the valve body. The inner edge of the sealing diaphragm is provided with a convex ring, which extends obliquely toward the valve core and forms a gap between the convex ring and the sealing diaphragm.

[0010] The valve body is provided with a sleeve portion, which has several outlet channels circumferentially. The side wall of the sleeve portion is also provided with at least one pressure relief hole, and each pressure relief hole is inclined towards the side closer to the valve seat.

[0011] The multiple pressure relief holes are also interconnected through a main hole, which is also connected to a dispersion hole, which is simultaneously connected to two adjacent outlet channels.

[0012] The beneficial effects of this utility model are as follows: This utility model has the advantage of reducing the torque required for opening and closing. By adopting a structure in which the output gear shaft of the drive motor meshes with the internal teeth of the transmission disc, and in combination with the transmission method of the transmission shaft driving the rotating plate, the torque required for the valve core to open and close is significantly reduced. This allows the drive motor to achieve reliable operation without high power output, reducing the demand for power supply. At the same time, it expands the application adaptability of the valve body in large-diameter pipelines. By setting a drive component with external threads to cooperate with the internal threads in the valve core linkage rod, the rotational motion is converted into linear motion, realizing the smooth axial movement of the valve core. A slider that slides with the guide groove is set on the outer wall of the linkage rod, which effectively restricts the circumferential rotation of the valve core during the movement, ensuring its precise axial displacement, and achieving high transmission efficiency and low power consumption operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0014] Figure 1 This is a schematic diagram of the structure of an ultrasonic gas meter built-in valve according to the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is an exploded view of the transmission disc, drive component, and valve core in this utility model; Figure 5 This is a partially enlarged sectional view of the sleeve portion in this utility model; In the diagram, 1-valve body, 2-valve core, 3-valve seat, 4-drive motor, 5-transmission disc, 6-drive component, 7-gear shaft, 8-recess, 9-internal gear, 10-drive shaft, 11-actuator plate, 12-external thread, 13-linkage rod, 14-internal thread, 15-guide component, 16-guide groove, 17-slider, 18-outer shell, 19-cap, 20-first shell, 21-second shell, 22-slot, 23-protrusion, 24-buckle, 25-slide groove, 26-first stop, 27-second stop, 28-first lever, 29-second lever, 30-sealing diaphragm, 31-protruding ring, 32-sleeve, 33-outlet channel, 34-pressure relief hole, 35-main hole, 36-dispersion hole. Detailed Implementation

[0015] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0016] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0017] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0018] like Figures 1 to 5As shown in the figure, an embodiment of the present invention is disclosed, comprising an ultrasonic gas meter with a built-in valve, including a valve body 1, a valve core 2, and an actuator. The valve body 1 is provided with a valve seat 3 that seals with the valve core 2. The actuator includes a drive motor 4, a transmission disc 5, and a drive component 6. The drive motor 4 outputs a gear shaft 7. One end of the transmission disc 5 has a recess 8, and the inner wall of the recess 8 is surrounded circumferentially by internal teeth 9 that mesh with the gear shaft 7. A transmission shaft 10 is provided on the edge of the transmission disc 5 near the outer peripheral wall. One end of the drive component 6 extends radially. The actuator has a toggle plate 11 with an external thread 12 at one end. The transmission disc 5 drives the toggle plate 11 to rotate via the transmission shaft 10. The valve core 2 extends a linkage rod 13 at the end away from the valve seat 3. The linkage rod 13 has an internal thread 14 that is threaded with the external thread 12. A guide member 15 is also sandwiched between the actuator and the valve body 1. The guide member 15 is sleeved on the outside of the linkage rod 13. The inner wall of the guide member 15 has a guide groove 16 that extends axially. The outer wall of the linkage rod 13 has a slider 17 that is slidably disposed in the guide groove 16.

[0019] The beneficial effects of this design are as follows: This utility model has the advantage of reducing the torque required for opening and closing. By adopting a structure in which the output gear shaft of the drive motor meshes with the internal teeth of the transmission disc, and in conjunction with the transmission method in which the transmission shaft drives the rotating plate, the torque required for the valve core to open and close is significantly reduced. This allows the drive motor to achieve reliable operation without high power output, reducing the demand for power supply. At the same time, it expands the applicability of the valve body in large-diameter pipelines. By setting a drive component with external threads to cooperate with the internal threads in the valve core linkage rod, the rotational motion is converted into linear motion, realizing the smooth axial movement of the valve core. A slider that slides with the guide groove on the outer wall of the linkage rod effectively restricts the circumferential rotation of the valve core during the movement, ensuring its precise axial displacement and achieving high transmission efficiency and low power consumption operation.

[0020] Furthermore, the actuator also includes a housing 18 and a cover 19. The housing 18 includes a first housing 20 for mounting the drive motor 4 and a second housing 21 for mounting the transmission disc 5. The outer peripheral walls of the first housing 20 and the second housing 21 are respectively provided with a slot 22 and a protrusion 23. The cover 19 is engaged with the slot 22 of the first housing 20 by a buckle 24. The valve body 1 is allowed to slide into the protrusion 23 of the second housing 21 through a sliding groove 25 to form a limiting fit.

[0021] The beneficial effects of this design are as follows: By using a modular outer shell composed of a first housing, a second housing, and a cover, the cover rotates and fastens onto the first housing through the snap-fit ​​mechanism of the slot and the buckle. The second housing rotates and fastens onto the valve body through the limiting fit formed by the sliding of the protrusion into the groove. This design, especially effective in preventing axial loosening, enables quick and reliable assembly and fixation of the actuator. This structure effectively prevents components from loosening under vibration, improves the overall stability and sealing of the actuator, and facilitates production assembly and subsequent maintenance.

[0022] Furthermore, the outer peripheral walls of the first housing 20 and the second housing 21 are respectively provided with a first stop block 26 and a second stop block 27. The cover 19 and the valve body 1 are respectively provided with a first lever block 28 and a second lever block 29. The outer walls of the first stop block 26 and the second stop block 27 are both arc surfaces, and the inner walls of the first lever block 28 and the second lever block 29 are both rounded surfaces adapted to the arc surfaces. When the side wall of the first lever block 28 abuts against the side wall of the first stop block 26, the buckle 24 engages with the slot 22. When the side wall of the second lever block 29 abuts against the side wall of the second stop block 27, the protrusion 23 slides into the slide groove 25 to form a limiting fit.

[0023] The beneficial effects of this design are as follows: By using a stop structure consisting of a first stop block with an arc surface and a first lever block with a rounded surface between the first housing and the cover, and a stop structure consisting of a second stop block with an arc surface and a second lever block with a rounded surface between the second housing and the valve body, clear physical limits and positioning indicators are provided for the assembly of the actuator. Especially for circumferential anti-loosening, the first lever block can slide along the arc surface of the first stop block to the other side of the first stop block via its rounded surface. The side wall of the first lever block will then abut against the side wall of the first stop block, preventing the first lever block from sliding back and thus preventing the cover from rotating, achieving a fixed connection between the cover and the first housing. Similarly, the valve body achieves a fixed connection between the valve body and the second housing through the abutment and positioning of the second lever block and the second stop block. This design ensures that the buckle and slot, and the protrusion and groove, can accurately reach the predetermined assembly position, effectively preventing damage to parts caused by interference fit or misalignment, and improving the accuracy and reliability of assembly. The combination of curved and rounded surfaces facilitates guidance and stress distribution during assembly, making operation smoother.

[0024] Furthermore, a sealing diaphragm 30, which is sleeved on the outside of the linkage rod 13, is sandwiched between the guide member 15 and the valve body 1. The inner edge of the sealing diaphragm 30 is provided with a convex ring 31, which extends obliquely toward the valve core 2, and a gap is formed between the convex ring 31 and the sealing diaphragm 30.

[0025] The beneficial effects of this design are as follows: By placing a sealing diaphragm with an inclined convex ring between the guide and the valve body, and fitting it with the valve core linkage rod, an effective dynamic sealing barrier is formed. This structure reliably isolates the gas in the valve cavity from the upper actuator, preventing gas leakage and protecting precision transmission components from corrosion. The inclined convex ring and the gap formed between it and the diaphragm body give the diaphragm greater deformation freedom and elastic compensation capability during valve core movement, reducing the frictional resistance of valve core movement and enhancing adaptability to pressure fluctuations, significantly improving the durability and reliability of the seal.

[0026] Furthermore, the valve body 1 is provided with a sleeve portion 32, the sleeve portion 32 is provided with a plurality of outlet channels 33 in the circumferential direction, and the side wall of the sleeve portion 32 is also provided with at least one pressure relief hole 34, each of the pressure relief holes 34 being inclined toward the side closer to the valve seat 3.

[0027] The beneficial effects of this design are as follows: By opening multiple outlet channels circumferentially in the valve body sleeve, the gas passage is optimized, allowing the gas to pass through the valve evenly and smoothly, effectively reducing flow resistance and noise. Simultaneously, the addition of a pressure relief hole inclined towards the valve seat cleverly utilizes gas dynamics during valve closure to guide some of the gas to the valve core sealing surface. This not only helps to purge impurities that may adhere to the sealing surface but also generates additional clamping force, enhancing the valve's sealing reliability under high pressure differential conditions and achieving a dynamic self-tightening seal. During valve opening, the gas can flow from the pressure relief hole to the outlet, achieving pressure relief and preventing the gas medium from impacting the inner wall of the sleeve.

[0028] Furthermore, the multiple pressure relief holes 34 are interconnected through a main hole 35, and the main hole 35 is also connected to a dispersion hole 36, which in turn connects to two adjacent outlet channels 33.

[0029] The beneficial effects of this design are as follows: Multiple pressure relief holes are interconnected via the main orifice, and adjacent outlet channels are bridged via distribution holes, creating a highly efficient internal pressure relief and flow field balancing network. This structure can quickly balance the pressure difference between the upstream and downstream of the valve core and in the circumferential direction, significantly reducing the impact load and operational vibration during valve opening and closing, and improving operational stability. Simultaneously, this design further optimizes fluid distribution, effectively eliminating local eddies and airflow dead zones, reducing noise, and enhancing the valve's adaptability to high-flow-rate conditions, thereby improving the overall performance and lifespan of the product.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An ultrasonic gas meter with a built-in valve, characterized in that: The device includes a valve body (1), a valve core (2), and an actuator. The valve body (1) is provided with a valve seat (3) that seals with the valve core (2). The actuator includes a drive motor (4), a transmission disc (5), and a drive component (6). The drive motor (4) outputs a gear shaft (7). One end of the transmission disc (5) has a recess (8). The inner wall of the recess (8) is surrounded circumferentially by internal teeth (9) that mesh with the gear shaft (7). A transmission shaft (10) is provided on the edge of the transmission disc (5) near the outer peripheral wall. One end of the drive component (6) has a toggle plate (11) extending radially and the other end has an external screw. The transmission disc (5) drives the actuating plate (11) to rotate via the transmission shaft (10). The valve core (2) extends a linkage rod (13) at one end away from the valve seat (3). The linkage rod (13) has an internal thread (14) that is threaded with the external thread (12). A guide member (15) is also sandwiched between the actuator and the valve body (1). The guide member (15) is sleeved on the outside of the linkage rod (13), and the inner wall of the guide member (15) has a guide groove (16) extending axially. The outer wall of the linkage rod (13) has a slider (17) that is slidably disposed in the guide groove (16).

2. The built-in valve of an ultrasonic gas meter according to claim 1, characterized in that: The actuator also includes a housing (18) and a cover (19). The housing (18) includes a first housing (20) for mounting the drive motor (4) and a second housing (21) for mounting the transmission disc (5). The outer peripheral walls of the first housing (20) and the second housing (21) are respectively provided with a slot (22) and a protrusion (23). The cover (19) is engaged with the slot (22) of the first housing (20) by a buckle (24). The valve body (1) is slid into the protrusion (23) of the second housing (21) through a slide groove (25) to form a limiting fit.

3. The built-in valve of an ultrasonic gas meter according to claim 2, characterized in that: The outer peripheral walls of the first housing (20) and the second housing (21) are respectively provided with a first stop (26) and a second stop (27). The cover (19) and the valve body (1) are respectively provided with a first lever (28) and a second lever (29). The outer walls of the first stop (26) and the second stop (27) are arc surfaces. The inner walls of the first lever (28) and the second lever (29) are rounded surfaces that are adapted to the arc surfaces. When the side wall of the first lever (28) abuts against the side wall of the first stop (26), the buckle (24) engages with the slot (22). When the side wall of the second lever (29) abuts against the side wall of the second stop (27), the protrusion (23) slides into the slide groove (25) to form a limiting fit.

4. The built-in valve of an ultrasonic gas meter according to claim 1, characterized in that: A sealing diaphragm (30) is sandwiched between the guide member (15) and the valve body (1) and is sleeved on the outside of the linkage rod (13). The inner edge of the sealing diaphragm (30) is provided with a convex ring (31). The convex ring (31) extends obliquely toward the valve core (2) and a gap is formed between the convex ring (31) and the sealing diaphragm (30).

5. The built-in valve of an ultrasonic gas meter according to claim 1, characterized in that: The valve body (1) is provided with a sleeve (32), and the sleeve (32) is provided with a plurality of outlet channels (33) in the circumferential direction. The side wall of the sleeve (32) is also provided with at least one pressure relief hole (34), and each pressure relief hole (34) is inclined toward the side closer to the valve seat (3).

6. The built-in valve of an ultrasonic gas meter according to claim 5, characterized in that: The multiple pressure relief holes (34) are also interconnected through a main hole (35), and the main hole (35) is also connected to a dispersion hole (36), which is simultaneously connected to two adjacent outlet channels (33).

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