A kind of table core counting sensing mechanism matched with the metering chamber main body of roots gas flowmeter

Abstract

The application discloses a watch core counting sensing mechanism matched with a metering chamber body of a Roots gas flowmeter, belongs to the technical field of flowmetering instruments, and comprises a shell part, a mechanical watch core counting mechanism, a built-in sensing mechanism and a magnetic coupling device. The magnetic coupling device non-contactingly senses the rotating speed of a rotor in the metering chamber and transmits the rotating speed to the mechanical watch core counting mechanism, and decimal mechanical counting is realized through multistage gear transmission; the built-in sensing mechanism internally arranges pulse, pressure and temperature sensor pipelines in the shell, synchronously collects multiple parameter signals and transmits the multiple parameter signals to an integration component to complete standard condition flow calculation. The application solves the problems of poor universality of parts, easy breakage of external pipelines and stagnation of standard condition measurement in the prior art, has the advantages of reliable structure, high measurement precision, convenient installation and maintenance, simple appearance and the like, and is widely applicable to various gas metering and trade handover metering scenes.

Description

Technical Field

[0001] This invention belongs to the field of flow metering instrument technology, and particularly relates to a core counting and sensing mechanism for a Roots gas flow meter's metering chamber. Background Technology

[0002] Currently, the most widely used volumetric gas flow meter in the Chinese market is the Roots gas flow meter. A traditional Roots gas flow meter mainly consists of a housing, conjugate rotors, and a counting device. Its working principle is as follows: a pair of conjugate rotors installed in the metering chamber rotate alternately under the pressure difference between the inlet and outlet of the flowing gas. Each rotation outputs four times the effective volume of the metering chamber. The rotational speed is measured by a counting device, thus achieving continuous or intermittent measurement of the gas flow rate in the pipeline. This type of flow meter is widely used in industrial production and domestic gas applications due to its wide operating pressure range, high measurement accuracy, broad measuring range, and strong adaptability to various media.

[0003] In terms of flow measurement methods, existing Roots gas flow meters are mainly divided into three categories according to user requirements: one is to directly count and display the flow rate using a counter after mechanical deceleration; the second is to obtain flow data through intelligent calculation after collecting pulse, pressure, and temperature sensor signals; and the third is to simultaneously configure the above two methods to achieve dual display of mechanical and intelligent flow. However, the flow meter structures corresponding to different measurement methods vary greatly, resulting in a wide variety of required components and poor versatility. This not only significantly increases the manufacturing cost of the product but also brings many inconveniences to on-site installation, commissioning, and subsequent maintenance.

[0004] More notably, existing Roots gas flow meters generally employ an external sensing structure, meaning that the pulse, pressure, and temperature sensor lines required for signal acquisition by the intelligent totalizer are all located outside the housing. This structure has the following significant drawbacks: First, the external piping affects the simplicity and aesthetics of the overall product appearance; second, exposed piping is highly susceptible to breakage and damage during transportation, installation, and use. Once the sensor signal is interrupted, the flow meter will be unable to perform standard condition measurements, directly causing the cessation of trade settlement measurement work and resulting in serious economic losses for both suppliers and buyers; third, frequent maintenance and parts replacement significantly increase the operating costs of the equipment; fourth, the external structure is loosely integrated, making it difficult to fully adapt to complex and changing on-site installation environments, limiting its application in certain special working conditions.

[0005] With the international adoption of standard operating condition flow data obtained through intelligent conversion of sensor signals as the basis for commodity trade settlement, higher demands are placed on the measurement stability, reliability, and field adaptability of Roots gas flow meters. Therefore, developing a new type of Roots gas flow meter core counting sensor mechanism that can overcome the aforementioned shortcomings of existing technologies, possesses both mechanical and intelligent dual display functions, has strong component versatility, is convenient for installation and maintenance, and has an integrated sensing pipeline, has become an urgent technical problem to be solved in this field. Summary of the Invention

[0006] To address these issues, this invention provides a core counting and sensing mechanism that complements the metering chamber of a Roots gas flow meter. This mechanism solves the problems of poor component versatility, inconvenient installation and maintenance, easy stagnation during standard condition measurement, high operating costs, and loose structure that makes it difficult to adapt to on-site installation requirements in existing Roots gas flow meters due to different measurement methods.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a core counting and sensing mechanism for a matching metering chamber of a Roots gas flow meter, comprising a housing, a mechanical core counting mechanism, a built-in sensing mechanism, and a magnetic coupling device; The housing portion is fixedly connected to the front cover of the metering chamber of the Roots gas flow meter, and the housing portion accommodates and supports the mechanical meter core counting mechanism and the built-in sensing mechanism; The magnetic coupling device is used to non-contactly sense and transmit the rotational speed of the rotor in the metering chamber of the Roots gas flow meter to the mechanical dial counting mechanism; the mechanical dial counting mechanism converts the rotational speed signal into a flow rate value through gear transmission and displays it mechanically. The built-in sensing mechanism includes a pulse sensing component, a pressure sensing component, and a temperature sensing component. The pipeline of the built-in sensing mechanism is built into the housing. The pulse sensing component collects the rotor speed pulse signal. The pressure sensing component and the temperature sensing component collect the pressure signal and temperature signal of the gas in the pipeline, respectively, and transmit them to the integrator to perform standard flow calculation.

[0008] As a preferred embodiment of the core counting and sensing mechanism of the metering chamber of the matching Roots gas flow meter, the housing part includes a first layer plate, a second layer plate, a third layer plate, a number of first pillars and a number of second pillars; The first layer, the second layer, and the third layer are arranged in parallel. The first layer and the second layer are fixedly connected by the first support column, and the second layer and the third layer are fixedly connected by the second support column to form an internal space for accommodating the mechanical watch movement counting mechanism and the built-in sensing mechanism. The third layer plate is machined with holes to allow the sensing components in the built-in sensing mechanism to pass through. The housing also includes a head cover and a sensor cover, which are fixedly connected to the front cover by a first screw.

[0009] As a preferred embodiment of the metering chamber of the Roots gas flow meter, the first support column has steps and threaded holes at both ends, and the first and second layer plates have corresponding through holes. One end of the second support column is provided with a step, and the other end of the second support column is machined with a step and a threaded hole. The second support column is riveted to the third layer plate, and the second support column is fixedly connected to the second layer plate by screws. The first layer plate has mounting screw holes. The housing is fixedly mounted on the front cover of the metering chamber of the Roots gas flow meter by the first screw. The front cover is provided with an oil window and an oil plug.

[0010] As a preferred embodiment of the core counting and sensing mechanism of the main body of the metering chamber of the Roots gas flow meter, the magnetic coupling device includes a spacer, a first magnet sleeve, and a signal disk. The spacer is fixedly installed on the front cover of the metering chamber of the Roots gas flow meter by a third screw; The first magnet sleeve is fixedly installed on the rotor shaft inside the metering chamber of the Roots gas flow meter, and the signal disk is fixedly connected to the first magnet sleeve by the fourth screw; The signal disk is a circular component, and several blind holes are evenly arranged on the edge of the signal disk. A magnet is interference-fitted into each blind hole, and the position of the magnet corresponds to the center position of the pulse sensing component.

[0011] As a preferred embodiment of the metering chamber of the Roots gas flow meter, the mechanical meter counting mechanism includes a drive shaft, a second magnetic sleeve, a first gear set, a second gear set, and a counter. The drive shaft passes through the first layer plate, the second layer plate and the third layer plate. A second magnet sleeve is installed at one end of the drive shaft. A blind hole is machined on the second magnet sleeve. A magnet is interference-fitted to the second magnet sleeve to sense the magnetic signal of the magnetic coupling device and drive the drive shaft to rotate. The other end of the drive shaft protrudes above the first layer plate, and the drive shaft is fixedly mounted with the first yin-yang symbol by a nut.

[0012] As a preferred embodiment of the metering chamber of the Roots gas flow meter, the first gear set includes several riveted gears in pairs, and the first gear set is installed on the first shaft and the second shaft with clearance fit. The first shaft and the second shaft are arranged in parallel, and the two ends of the first shaft / second shaft are respectively clearance-fitted with the copper sleeves riveted to the first layer plate and the second layer plate; A drive gear is fixedly mounted on the drive shaft. The drive gear meshes with the first disc gear in the first gear set, and the first gear set is used to achieve speed reduction transmission.

[0013] As a preferred embodiment of the core counting and sensing mechanism of the metering chamber of the Roots gas flow meter, the second gear set includes three disc gears, which are respectively installed on three third shafts with clearance fit, and one end of each of the three third shafts is riveted to the first layer plate. One end of the first shaft extends beyond the first layer plate, and a first transmission gear is fixedly mounted on the first shaft. The first transmission gear meshes with a plate gear in the second gear set. The second gear set enables the counter to count in either the forward or reverse direction through a predetermined gear meshing pattern.

[0014] As a preferred embodiment of the counter mechanism for the metering chamber of the Roots gas flow meter, the counter includes a fourth shaft, a fifth shaft, several counting gears, and several auxiliary gears. The fourth axis and the fifth axis are arranged in parallel, and the two ends of the fourth axis / the fifth axis are respectively fitted with the copper sleeves riveted to the first layer plate and the second layer plate; A second transmission gear is fixedly installed on the fourth shaft. The second transmission gear meshes with the plate gear in the second gear set. Several counting gears are also installed on the fourth shaft with clearance fit. The fifth shaft is fitted with a plurality of auxiliary gears with clearance fit, and each auxiliary gear meshes with two adjacent counting gears; One end of the fourth shaft extends beyond the first layer plate, and the fourth shaft is fixedly mounted with the second yin-yang symbol by a nut.

[0015] As a preferred embodiment of the counting and sensing mechanism of the metering chamber of the Roots gas flow meter, each counting gear has ten numbers from 0 to 9 evenly distributed on its outer circle, one side in the thickness direction has 20 teeth, and the other side has an outwardly protruding and inwardly concave flange with a small raised groove on the flange. Each of the auxiliary gears has 8 teeth, and the 8 teeth are arranged in pairs with two thicknesses. When the first counting gear rotates to the position of its raised groove close to the first auxiliary gear, the high teeth of the first auxiliary gear fall into the raised groove, driving the first auxiliary gear to rotate, which in turn drives the second counting gear to rotate to achieve carry counting.

[0016] As a preferred embodiment of the counting and sensing mechanism of the meter core of the matching Roots gas flow meter metering chamber, it also includes a counting gear retaining ring, which is an irregularly shaped copper sheet, with an irregularly shaped hole in the middle and four flanges on the edge of the counting gear retaining ring; A small groove is machined on the fourth shaft corresponding to the position of the first counting gear. The counting gear retaining ring is fitted into the small groove and fixedly connected to the fourth shaft through a special-shaped hole. The first counting gear has four slots machined on its teeth, and the four flanges of the counting gear retaining ring are respectively inserted into the four slots, so that the first counting gear rotates synchronously with the fourth shaft.

[0017] As a preferred embodiment of the metering chamber of the Roots gas flow meter, the pulse sensing component includes a pulse sensor, the pressure sensing component includes a pressure sensor, and the temperature sensing component includes a temperature sensor. The pulse sensor, the pressure sensor, and the temperature sensor are all fixedly mounted on the front cover; The totalizing component is screwed to the outside of the housing portion, and the pulse sensor, the pressure sensor, and the temperature sensor are all electrically connected to the totalizing component through built-in pipelines; The temperature sensor is a shaft-like rod with an internally sealed temperature sensing element, which is installed on the front cover via a threaded connection. The pulse sensor is a tubular part with a flange at one end and a closed end at the other end; a pulse sensing element is installed in the internal space of the pulse sensor, and a through hole is machined on the flange of the pulse sensor. The pulse sensor is fixedly installed on the front cover by a second screw. The pressure sensor includes a pressure wire, a pressure sensing element, and a protective sleeve; the pressure sensing element is installed inside the protective sleeve, the pressure wire is used to fix the pressure sensing element inside the protective sleeve, and the protective sleeve is fixedly installed on the front cover.

[0018] As a preferred embodiment of the metering chamber of the Roots gas flow meter, the third layer plate is riveted with a bearing housing, and the drive shaft is stably assembled through the bearing housing and the bearing on the first layer plate. The bearing is axially positioned by a fifth screw.

[0019] As a preferred embodiment of the metering chamber of the Roots gas flow meter, the core counting and sensing mechanism also includes a counter baffle, which is manually wound around the first support column, and the counter baffle is provided with a window for displaying the flow value on the counter. All gears in the mechanical watch movement counting mechanism are standard spur gears with a tooth profile angle of 20 degrees, and are made of all-copper material. The drive shaft, the first shaft, the second shaft, the third shaft, the fourth shaft, and the fifth shaft are all made of carbon steel. All shafts are machined with several axial retaining ring grooves and locating pin holes or steps for mounting and positioning the shafts with the plates and gears.

[0020] The present invention has the following advantages: This invention integrates a mechanical meter counting mechanism and a built-in sensing mechanism, providing both direct mechanical flow display and standard flow calculation functions to meet the needs of different users. The entire series of meter counting mechanism parts are standardized and serialized, solving the problem of poor versatility of parts for different measurement methods in existing technologies, effectively reducing manufacturing costs and improving production efficiency and product quality.

[0021] This invention integrates all the pipelines of the pulse, pressure, and temperature sensors inside the housing, solving the problems of easy breakage and damage of external pipelines. It avoids measurement interruptions and economic losses in trade settlements caused by sensor signal interruptions, significantly reducing equipment maintenance frequency and operating costs. Simultaneously, the built-in structure makes the product aesthetically pleasing and compact, fully adaptable to complex and changing field installation environments.

[0022] This invention relates to a mechanical counting mechanism that senses the rotor speed through a magnetic coupling and relies on the gas's own energy to drive a gear transmission system for counting, eliminating the need for an external power supply. This structure is simple and reliable, offering high measurement accuracy, strong stability, and low maintenance costs, making it particularly suitable for applications where power supply is inconvenient or where strict explosion-proof requirements are in place.

[0023] This invention adopts a modular design, with the shell and metrology chamber body fixedly connected by screws. The assembly relationship of each component is clear, facilitating on-site installation and subsequent disassembly and maintenance. At the same time, the standardized design of universal parts also reduces the difficulty and cost of procuring and replacing spare parts.

[0024] This invention retains the original advantages of Roots gas flow meters, such as a wide operating pressure range, high measurement accuracy, broad measuring range, and strong adaptability to flowing media, while further improving the product's stability and reliability. It can be widely used in gas metering scenarios such as urban natural gas metering, natural gas metering in transmission and distribution pipelines, and gas metering in the petroleum, chemical, power, and residential boiler industries. Especially in trade transfer metering stations, its high stability can significantly reduce equipment maintenance time and costs, while its high accuracy ensures the accuracy of industrial and trade settlements, effectively protecting the economic interests of both supply and demand sides. Attached Figure Description

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0027] Figure 1 This is a schematic diagram of the overall counting and sensing mechanism of the meter core of the metering chamber of the matching Roots gas flow meter provided in this embodiment of the invention; Figure 2 This is an exploded view of the core counting and sensing mechanism of the metering chamber of the matching Roots gas flow meter provided in this embodiment of the invention. Figure 3 This is a schematic diagram of the pressure sensor structure of the metering chamber body of the matching Roots gas flow meter provided in this embodiment of the invention; Figure 4 This is a schematic diagram of the installation of the counting gear retaining ring of the counting sensor mechanism of the metering chamber of the matching Roots gas flow meter provided in this embodiment of the invention; Figure 5 This is a schematic diagram of the mechanical counting mechanism of the meter core counting sensor mechanism of the main body of the metering chamber of the Roots gas flow meter provided in this embodiment of the invention; Figure 6 This is a schematic diagram of the counter structure of the meter core counting sensor mechanism of the metering chamber of the matching Roots gas flow meter provided in this embodiment of the invention.

[0028] In the diagram, 1. Housing; 2. Mechanical counting mechanism; 3. Built-in sensing mechanism; 4. Magnetic coupling; 5. First screw; 6. Head cover; 7. Sensor cover; 8. Pressure sensor; 9. Temperature sensor; 10. Second screw; 11. Pulse sensor; 12. Front cover; 13. Oil window; 14. Oil plug; 15. Spacer; 16. Third screw; 17. Fourth screw; 18. Signal disc; 19. First magnet sleeve; 20. Pressure wire; 21. Pressure sensing element; 22. Sheath; 23. Counting gear retaining ring; 24. Fifth screw; 25. Bearing; 6. First shelf; 27. Counter; 28. First shaft; 29. ​​First gear set; 30. Second shaft; 31. Second shelf; 32. First support column; 331. First yin-yang symbol; 332. Second yin-yang symbol; 34. Drive gear; 35. Drive shaft; 36. Third shaft; 37. Second transmission gear; 38. Second gear set; 39. First transmission gear; 40. Counter baffle; 41. Bearing housing with bearing; 42. Second magnet sleeve; 43. Second support column; 44. Third shelf; 45. Fourth shaft; 46. Fifth shaft; 47. Counting gear; 48. Auxiliary gear. Detailed Implementation

[0029] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6This invention provides a core counting and sensing mechanism for a Roots gas flow meter's metering chamber, comprising a housing 1, a mechanical core counting mechanism 2, a built-in sensing mechanism 3, and a magnetic coupling 4. The housing 1 is fixedly connected to the front cover 12 of the Roots gas flow meter's metering chamber, and houses and supports the mechanical core counting mechanism 2 and the built-in sensing mechanism 3. The magnetic coupling 4 is used to non-contactly sense and transmit the rotational speed of the rotor inside the Roots gas flow meter's metering chamber to the mechanical core counting mechanism 2. The mechanical core counting mechanism 2 converts the rotational speed signal into a flow rate value through gear transmission and displays it mechanically. The built-in sensing mechanism 3 includes a pulse sensing component, a pressure sensing component, and a temperature sensing component. The pipeline of the built-in sensing mechanism 3 is built inside the housing 1. The pulse sensing component collects the rotor rotational speed pulse signal, and the pressure sensing component and temperature sensing component collect the pressure signal and temperature signal of the gas in the pipeline, respectively, and transmit them to the integrator component for standard flow rate calculation.

[0031] Among them, the magnetic coupling device 4 adopts non-contact magnetic coupling transmission, eliminating the need for openings in the high-pressure housing of the metering chamber, thus avoiding the risk of gas leakage, and achieving complete isolation between the metering chamber and the meter core mechanism. The mechanical meter core counting mechanism 2 is driven by the pressure difference energy generated by the gas-driven rotor, requiring no external power supply throughout the process, making it particularly suitable for areas without power supply in the field and explosive hazardous environments. The built-in sensing mechanism 3 completely hides all signal pipelines inside the housing, fundamentally solving the problem of standard condition measurement interruption caused by external pipelines being easily torn by external forces or aging and damaged, ensuring the continuity of settlement measurement, and making the overall appearance of the product more concise and neat.

[0032] In this embodiment, the housing part 1 includes a first layer plate 26, a second layer plate 31, a third layer plate 44, a plurality of first pillars 32, and a plurality of second pillars 43; the first layer plate 26, the second layer plate 31, and the third layer plate 44 are arranged in parallel, the first layer plate 26 and the second layer plate 31 are fixedly connected by the first pillars 32, and the second layer plate 31 and the third layer plate 44 are fixedly connected by the second pillars 43 to form an internal space for accommodating the mechanical watch movement counting mechanism 2 and the built-in sensing mechanism 3; the third layer plate 44 is machined with through holes to allow the sensing components in the built-in sensing mechanism 3 to pass through; the housing part 1 also includes a watch head cover 6 and a sensing cover 7, the watch head cover 6, the sensing cover 7, and the third layer plate 44 are fixedly connected by the first screws 5 and the front cover 12, and rubber asbestos plates are installed between each component for sealing.

[0033] Specifically, the housing 1 adopts a three-layer plate support structure, dividing the internal space into two independent functional areas: the mechanical transmission area is between the first plate 26 and the second plate 31, where a gear reduction system and a mechanical counter 27 are installed; the sensor acquisition area is between the second plate 31 and the third plate 44, where pulse, pressure, and temperature sensors are centrally located. This partitioned design ensures that the functional modules do not interfere with each other, allowing for pre-assembly of each module before overall assembly, significantly improving production efficiency. During maintenance, individual modules can also be disassembled. Through-holes on the third plate 44 provide direct access to the metering chamber for the sensing elements, ensuring the accuracy of sensor signal acquisition. The meter head cover 6 is made of transparent material, protecting the counter 27 from dust and moisture without affecting the observation of the meter's working status; the sensor cover 7 provides physical protection for the protruding sensing components, preventing damage from collisions during transportation and installation.

[0034] In this embodiment, both ends of the first support column 32 are machined with steps and threaded holes, and the first layer plate 26 and the second layer plate 31 are machined with corresponding through holes. The first layer plate 26 and the second layer plate 31 are fixedly connected by screws. One end of the second support column 43 is provided with a step, and the other end of the second support column 43 is machined with a step and threaded holes. The second support column 43 is riveted to the third layer plate 44, and the second support column 43 is fixedly connected to the second layer plate 31 by screws. The first layer plate 26 is machined with process holes for mounting screws, so as to facilitate the screws used to fasten the second support column 43 and the second layer plate 31 with a screwdriver. The housing part 1 is fixedly installed on the front cover 12 of the metering chamber of the Roots gas flow meter by the first screw 5. The front cover 12 is provided with an oil window 13 and an oil plug 14.

[0035] Specifically, the first support column 32 adopts a threaded connection at both ends, facilitating repeated disassembly and reassembly of the first layer plate 26 and the second layer plate 31, thus providing convenience for the debugging and maintenance of the mechanical transmission system. The second support column 43 adopts a hybrid connection process of riveting at one end and screwing at the other end. The riveting ensures the connection strength and perpendicularity of the third layer plate 44, while the screwing facilitates the disassembly and adjustment of the second layer plate 31. The mounting screw holes on the first layer plate 26 serve as space for a screwdriver when tightening the screws connecting the second support column 43 and the second layer plate 31. The housing part 1 is securely fixed to the front cover 12 of the metering chamber by the first screw 5. The oil window 13 is used to observe the level of the lubricating oil in the metering chamber in real time, and the oil plug 14 is used for periodically adding and replacing the lubricating oil to ensure the lubrication effect of the conjugate rotor and extend the service life of the flow meter.

[0036] In this embodiment, the magnetic coupling device 4 includes a spacer 15, a first magnet sleeve 19, and a signal disk 18. The spacer 15 is fixedly installed on the front cover 12 of the main body of the Roots gas flow meter metering chamber by a third screw 16. The first magnet sleeve 19 is fixedly installed on the rotor shaft inside the Roots gas flow meter metering chamber. The signal disk 18 is fixedly connected to the first magnet sleeve 19 by a fourth screw 17. The signal disk 18 is a circular component, and several blind holes are evenly arranged on the edge of the signal disk 18. A magnet is interference-fitted into each blind hole, and the position of the magnet corresponds to the center position of the pulse sensing component.

[0037] Specifically, the magnetic coupling device 4 operates based on the magnetic coupling principle of attraction between opposite magnetic poles. When the conjugate rotor in the metering chamber rotates under the pressure difference between the gas inlet and outlet, it drives the first magnet sleeve 19 on the rotor shaft to rotate synchronously. Its magnetic field penetrates the non-magnetic front cover 12 of the metering chamber, driving the second magnet sleeve 42 on the core side to rotate synchronously, thereby transmitting the rotor speed to the mechanical counting mechanism without contact. The magnet on the signal disk 18 rotates synchronously with the first magnet sleeve 19. The pulse sensing component detects the change in the magnetic field generated when the magnet passes by, converting the rotor speed into an electrical pulse signal with a frequency proportional to the speed, providing operating flow data for intelligent totalization. The method of interference fit of the magnet without through holes effectively prevents the magnet from falling off due to centrifugal force during high-speed rotation, significantly improving the reliability of the device.

[0038] In this embodiment, the mechanical watch core counting mechanism 2 includes a drive shaft 35, a second magnetic sleeve 42, a first gear set 29, a second gear set 38, and a counter 27. The drive shaft 35 passes through the first layer plate 26, the second layer plate 31, and the third layer plate 44. The second magnetic sleeve 42 is installed at one end of the drive shaft 35. A blind hole is machined on the second magnetic sleeve 42. The second magnetic sleeve 42 is interference-fitted with a magnet to sense the magnetic signal of the magnetic coupling device 4 and drive the drive shaft 35 to rotate. The other end of the drive shaft 35 extends above the first layer plate 26. The first yin-yang plate 331 is fixedly installed on the drive shaft 35 by a nut.

[0039] Specifically, the second magnet sleeve 42 and the first magnet sleeve 19 form a magnetic coupling pair, synchronously transmitting the rotation of the rotor inside the metering chamber to the drive shaft 35. The drive shaft 35, as the power input shaft of the entire mechanical counting mechanism, is responsible for transmitting the magnetically coupled torque to the subsequent gear reduction system. The surface of the first yin-yang plate 331 features a contrasting design of half black and half white, producing a noticeable flashing effect when rotating at high speed synchronously with the drive shaft 35. This facilitates quick judgment by debugging and maintenance personnel as to whether the flow meter is working properly and whether the rotation direction of the drive shaft 35 is correct. The blind hole design on the second magnet sleeve 42 is also to prevent the internal magnets from falling off during high-speed rotation, ensuring the continuity and reliability of the transmission.

[0040] In this embodiment, the first gear set 29 includes a plurality of riveted disc gears in pairs. The first gear set 29 is installed on the first shaft 28 and the second shaft 30 with clearance fit. The first shaft 28 and the second shaft 30 are arranged in parallel, and the two ends of the first shaft 28 / second shaft 30 are respectively in clearance fit with the copper sleeves riveted on the first layer plate 26 and the second layer plate 31. A drive gear 34 is fixedly installed on the drive shaft 35. The drive gear 34 meshes with the first disc gear in the first gear set 29, and the first gear set 29 realizes speed reduction transmission.

[0041] Specifically, the first gear set 29 is the first-stage reduction unit of the mechanical counting mechanism. It adopts a combination structure of multiple riveted gears in pairs. The number of gear teeth and stages can be flexibly adjusted according to the metering chamber volume and range requirements of different diameter flow meters to achieve different reduction ratios, so that the rotational speed of the final counter 27 accurately corresponds to the actual flow value. The gears are clearance-fitted with the first shaft 28 and the second shaft 30, allowing the gears to rotate freely on the shafts and transmit torque only through gear meshing. The copper bushing has excellent wear resistance and self-lubricating properties, which can significantly reduce the frictional resistance between the shaft and the plate, reduce transmission loss, and extend the service life of the mechanism. At the same time, the non-sparking properties of copper meet the explosion-proof requirements.

[0042] In this embodiment, the second gear set 38 includes three disc gears, which are respectively fitted with a clearance fit on three third shafts 36. One end of each of the three third shafts 36 is riveted to the first layer plate 26. One end of the first shaft 28 extends above the first layer plate 26. A first transmission gear 39 is fixedly installed on the first shaft 28. The first transmission gear 39 meshes with the disc gears in the second gear set 38. The second gear set 38 realizes the forward or reverse counting of the counter 27 through the set gear meshing direction.

[0043] Specifically, the second gear set 38 serves as both the second-stage reduction unit and the function of changing the counting direction. The three third shafts 36 are riveted to the first layer plate 26 at one end, resulting in a simple assembly process and compact structure. By changing the meshing sequence and transmission path of the three gears, the rotation direction of the output shaft can be flexibly adjusted, thereby enabling the counter 27 to count forward or backward, meeting the usage requirements of different installation directions (horizontal / vertical) and different fluid flow directions of the flowmeter. The first transmission gear 39 transmits the rotational speed output from the first gear set 29 to the second gear set 38. After secondary reduction, the rotational speed is reduced to a low-speed range suitable for the operation of the counter 27, ensuring the accuracy and stability of the counting.

[0044] In this embodiment, the counter 27 includes a fourth shaft 45, a fifth shaft 46, several counting gears 47, and several auxiliary gears 48. The fourth shaft 45 and the fifth shaft 46 are arranged in parallel, and both ends of the fourth shaft 45 / fifth shaft 46 are respectively clearance-fitted with the copper sleeves riveted to the first layer plate 26 and the second layer plate 31. A second transmission gear 37 is fixedly installed on the fourth shaft 45, and the second transmission gear 37 meshes with the plate gear in the second gear set 38. Several counting gears 47 are also clearance-fitted on the fourth shaft 45. Several auxiliary gears 48 are clearance-fitted on the fifth shaft 46, and each auxiliary gear 48 meshes with two adjacent counting gears 47. One end of the fourth shaft 45 extends above the first layer plate 26, and a second yin-yang plate 332 is fixedly installed on the fourth shaft 45 by a nut.

[0045] Specifically, counter 27 employs a carry transmission structure using counting gear 47 and auxiliary gear 48. The second transmission gear 37 transmits the torque output from the second gear set 38 to the fourth shaft 45, which serves as the input shaft of counter 27, driving the first counting gear 47 to rotate. The fifth shaft 46 is a fixed shaft and does not rotate with the gears. The auxiliary gear 48 is loosely fitted on the fifth shaft 46 and rotates only during carry operations, meshing with adjacent counting gears 47 to achieve carry transmission from lower to higher positions. The second yin-yang symbol 332 functions the same as the first yin-yang symbol 331, visually displaying the rotation status of the input shaft of counter 27, facilitating the determination of whether the carry transmission is functioning correctly. The use of copper sleeves ensures the smooth rotation of the fourth shaft 45 and the fifth shaft 46, reducing friction noise.

[0046] In this embodiment, the outer circumference of each counting gear 47 is evenly distributed with the numbers 0-9, one side in the thickness direction is provided with 20 teeth, and the other side is provided with a flange that protrudes outward and is concave inward, and a small groove is provided on the flange; each auxiliary gear 48 is provided with 8 teeth, and the 8 teeth are arranged in pairs in two thicknesses. When the first counting gear 47 rotates to the position of its raised groove close to the first auxiliary gear 48, the high teeth of the first auxiliary gear 48 fall into the raised groove, driving the first auxiliary gear 48 to rotate, which in turn drives the second counting gear 47 to rotate to achieve carry counting.

[0047] Specifically, the digits 0-9 on the outer circumference of the counting gear 47 are used to visually display the cumulative flow value. Its 20 teeth precisely mesh with the 8 teeth of the auxiliary gear 48, enabling a decimal counting function that carries over once every 10 revolutions. The raised groove on the flange of the counting gear 47 is the key structure for triggering the carry. When the lower-level counting gear 47 rotates once, the raised groove passes through the corresponding auxiliary gear 48 once. The 8 teeth of the auxiliary gear 48 have two thicknesses: the lower teeth always rest on the flange surface of the counting gear 47, preventing the auxiliary gear 48 from rotating freely when not carrying over; the higher teeth fall into the groove when the raised groove passes over them, and are driven by the counting gear 47 to rotate one tooth position, thus pushing the higher-level counting gear 47 to rotate one digit, completing one carry. This process continues, and through the cooperation of multiple levels of counting gears 47 and auxiliary gears 48, continuous cumulative counting from the ones place to the ten-thousands place or even higher places is achieved.

[0048] In this embodiment, a counting gear retaining ring 23 is also included. The counting gear retaining ring 23 is an irregularly shaped copper sheet with an irregularly shaped hole in the middle and four flanges on its edge. A small groove is machined on the fourth shaft 45 corresponding to the position of the first counting gear 47. The counting gear retaining ring 23 is fitted into the small groove and fixedly installed to the fourth shaft 45 through the irregularly shaped hole. Four grooves are machined on the teeth of the first counting gear 47. The four flanges of the counting gear retaining ring 23 are respectively inserted into the four grooves, so that the first counting gear 47 rotates synchronously with the fourth shaft 45.

[0049] Specifically, the counting gear retaining ring 23 is a fixing component that enables the first counting gear 47 to rotate synchronously with the fourth shaft 45. Since all the other counting gears 47, except the first, have a clearance fit with the fourth shaft 45 (rotating only during carry-over), a special structure is needed to fix the first counting gear 47 to the fourth shaft 45. The irregularly shaped hole mates with the small groove on the fourth shaft 45, allowing the counting gear retaining ring 23 to rotate synchronously with the fourth shaft 45 without relative slippage; four flanges engage with the four grooves of the first counting gear 47, firmly connecting the counting gear retaining ring 23 to the first counting gear 47, thus enabling the first counting gear 47 to rotate synchronously with the fourth shaft 45. This fixing method is simple in structure, easy to assemble, and reliable in connection, ensuring that the first counting gear 47 accurately follows the rotation of the fourth shaft 45, providing a stable input for the entire counter 27.

[0050] In this embodiment, the pulse sensing component includes a pulse sensor 11, the pressure sensing component includes a pressure sensor 8, and the temperature sensing component includes a temperature sensor 9. The pulse sensor 11, pressure sensor 8, and temperature sensor 9 are all fixedly mounted on the front cover 12. The integrator is screwed to the outside of the housing portion 1. The pulse sensor 11, pressure sensor 8, and temperature sensor 9 are all electrically connected to the integrator via built-in conduits. The temperature sensor 9 is a shaft-like rod with an internally sealed temperature sensing element, and is threadedly mounted on the front cover 12. The pulse sensor 11 is a tubular part with a flange at one end and a closed end at the other. The pulse sensing element is installed inside the pulse sensor 11, and a through hole is machined on the flange of the pulse sensor 11. The pulse sensor 11 is fixedly mounted on the front cover 12 using a second screw 10. The pressure sensor 8 includes a pressure wire 20, a pressure sensing element 21, and a sheath 22. The pressure sensing element 21 is installed inside the sheath 22, and the pressure wire 20 is used to fix the pressure sensing element 21 inside the sheath 22. The sheath 22 is fixedly mounted on the front cover 12.

[0051] Specifically, the built-in sensing mechanism 3 integrates the acquisition functions of three types of parameters: flow rate, pressure, and temperature, providing complete raw data for standard condition flow rate calculation. The pulse sensor 11 adopts a tubular structure with one end closed, sealing the pulse sensing element internally to prevent dust and moisture intrusion. The flange connection facilitates installation and replacement. The pressure sensor 8 uses a sealed structure of sheath 22 and pressure wire 20, completely sealing the pressure sensing element 21 within the sheath 22. This ensures that the pressure sensing element 21 can accurately sense the gas pressure inside the pipeline while preventing high-pressure gas leakage. The temperature sensor 9 is a shaft-like rod with an internally sealed temperature sensing element. The pressure sensor 8 and temperature sensor 9 are directly inserted into the pipeline, enabling real-time and accurate measurement of the actual gas temperature. After receiving the three types of sensor signals, the integrator converts the volumetric flow rate under operating conditions to the volumetric flow rate under standard conditions (20℃, 101.325kPa) according to the ideal gas law, meeting internationally accepted settlement and metering requirements.

[0052] In this embodiment, a bearing housing 41 with bearing is riveted to the third layer plate 44, and the drive shaft 35 is stably assembled with the bearing housing 41 and the bearing 25 on the first layer plate 26; the bearing 25 is axially positioned by the fifth screw 24.

[0053] Specifically, the drive shaft 35 is a long shaft that runs through the three layers of plates. During operation, it bears the radial and axial forces of the gear transmission, requiring a stable and reliable support structure. A bearing housing 41 with bearings is riveted to the third layer plate 44, providing radial support and axial positioning for the lower end of the drive shaft 35; the bearing 25 on the first layer plate 26 provides radial support for the upper end of the drive shaft 35. This two-point support structure effectively prevents bending deformation and vibration of the drive shaft 35 during high-speed rotation, ensuring the meshing accuracy of the gear transmission and reducing transmission errors and noise. The fifth screw 24 is used to axially position the bearing 25 on the first layer plate 26, preventing axial movement of the bearing 25 during rotation, further improving the operational stability and service life of the drive shaft 35.

[0054] In this embodiment, a counter baffle 40 is also included. The counter baffle 40 is manually wound around the first support column 32. The counter baffle 40 is provided with a window for displaying the flow rate value on the counter 27. All gears in the mechanical dial counting mechanism 2 are standard spur gears with a tooth profile angle of 20 degrees and are made of all-copper material. The drive shaft 35, the first shaft 28, the second shaft 30, the third shaft 36, the fourth shaft 45, and the fifth shaft 46 are all made of carbon steel. All shafts are machined with several axial retaining ring grooves and positioning pin holes or steps for the installation and positioning of the shafts, plates, and gears.

[0055] Specifically, the counter baffle 40 is used to shield the complex gear transmission structure inside the counter 27, exposing only the digital display area, making the reading clearer and more intuitive. The manual winding installation method requires no additional fixing parts, making assembly simple and quick. All gears are standard 20-degree tooth angle spur gears, which have the advantages of smooth transmission, high meshing accuracy, low processing cost, and good interchangeability. The all-copper material has excellent wear resistance, corrosion resistance, and self-lubricating properties, which can significantly reduce gear wear and extend service life. At the same time, the copper material will not generate electric sparks, fully meeting the explosion-proof requirements of explosive gas environments. All shaft parts are made of high-quality carbon steel, with sufficient strength and rigidity to withstand the torque and load generated by gear transmission. The axial retaining ring groove, locating pin hole, and step on the shaft are used to achieve precise positioning and fixation between the shaft and the plate, and between the shaft and the gear, preventing axial movement and relative sliding of parts during operation, ensuring the accuracy and reliability of transmission.

[0056] The working principle of this invention is as follows: When the gas to be measured enters the metering chamber of the Roots gas flow meter, under the influence of the pressure difference between the inlet and outlet, a pair of conjugate rotors inside the metering chamber rotate alternately, outputting four times the effective volume of gas per revolution. The first magnet sleeve 19, fixed on the rotor shaft, rotates synchronously with the rotor. The alternating magnetic field it generates penetrates the non-magnetic front cover 12 of the metering chamber and drives the second magnet sleeve 42 on the meter core side to rotate synchronously through magnetic coupling, realizing contactless transmission of the speed signal. This non-contact transmission eliminates the need for openings in the high-pressure housing of the metering chamber, completely avoiding the risk of gas leakage, and simultaneously achieving complete isolation between the metering chamber and the meter core mechanism. The signal disk 18, fixedly connected to the first magnet sleeve 19, rotates synchronously. Small magnets evenly installed on its edge pass sequentially through the sensing area of ​​the pulse sensor 11, generating an alternating magnetic field signal proportional to the rotor speed.

[0057] The drive gear 34 on the drive shaft 35 meshes with the first gear set 29. The first gear set 29 consists of multiple riveted sprockets, achieving multi-stage speed reduction through multiple gear meshing, reducing the high-speed rotation of the rotor to a low-speed range suitable for the operation of the counter 27. The reduced speed is transmitted to the second gear set 38 via the first transmission gear 39. The second gear set 38 can adjust the gear meshing direction and speed ratio to enable the counter 27 to count in either the forward or reverse direction, adapting to different fluid flow directions and installation orientations. The second gear set 38 drives the fourth shaft 45 to rotate via the second transmission gear 37. The counting gear retaining ring 23 fixes the first counting gear 47 to the fourth shaft 45, causing it to rotate synchronously with the fourth shaft 45. Each counting gear 47 has ten digits (0-9) printed on its outer circumference, 20 teeth on one side in the thickness direction, and a flange with raised grooves on the other side.

[0058] When the first counting gear 47 rotates once, the raised groove on its flange passes precisely through the corresponding auxiliary gear 48. The eight teeth of the auxiliary gear 48 are of two different thicknesses: the lower teeth always rest on the flange surface of the counting gear 47 to prevent free rotation, while the higher teeth fall into the groove as they pass through, and are driven by the counting gear 47 to rotate one tooth position, thereby driving the next higher-position counting gear 47 to rotate one digit, completing one decimal carry. This process continues, with the cooperation of multiple levels of counting gears 47 and auxiliary gears 48, achieving continuous cumulative counting from the units digit to the higher digits. The first yin-yang plate 331 and the second yin-yang plate 332 rotate synchronously with the drive shaft 35 and the fourth shaft 45 respectively, visually displaying the operating status of the mechanism through a half-black, half-white flashing effect; the counter baffle 40 conceals the complex internal gear structure, only revealing the digit display area, making the reading clearer and more intuitive.

[0059] While mechanically counting, the built-in sensing mechanism 3 simultaneously acquires multi-parameter signals and performs intelligent calculations. The pulse sensor 11 detects the change in the magnetic field generated when the small magnet on the signal disk 18 passes by, converting the rotor speed into an electrical pulse signal with a frequency proportional to the flow rate, representing the volumetric flow rate under operating conditions. The pressure sensor 8 directly senses the pressure of the gas in the pipeline through the pressure sensing element 21. The temperature sensor 9 is directly inserted into the pipeline to measure the actual temperature of the gas in real time. The signals from all sensors are transmitted to the intelligent totalizer through pipelines completely built into the housing. The totalizer, based on the ideal gas law (PV=nRT), converts the acquired operating flow rate, pressure, and temperature data into the volumetric flow rate under standard conditions (20℃, 101.325kPa), meeting internationally accepted trade settlement measurement requirements.

[0060] This invention achieves parallel display of mechanical direct reading and intelligent standard condition measurement. The mechanical counter 27 requires no external power supply, relying on the gas's own energy for propagation, and can continuously display the cumulative flow rate even in the event of a power outage, serving as the legal basis for trade settlement. The intelligent accumulation system displays various parameters such as standard condition flow rate, instantaneous flow rate, and cumulative flow rate in real time, and can realize data storage and remote transmission functions, meeting the needs of modern management. The two measurement paths are independent of each other and serve as backups for each other, ensuring both the reliability and continuity of measurement while taking into account traditional trade settlement habits and intelligent management requirements.

[0061] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A counting and sensing mechanism for a meter core of a Roots gas flow meter's metering chamber, characterized in that, It includes a housing (1), a mechanical watch movement counting mechanism (2), a built-in sensing mechanism (3), and a magnetic coupling device (4); The housing part (1) is fixedly connected to the front cover (12) of the metering chamber of the Roots gas flow meter. The housing part (1) accommodates and supports the mechanical meter core counting mechanism (2) and the built-in sensing mechanism (3). The magnetic coupling device (4) is used to non-contactly sense and transmit the rotational speed of the rotor in the metering chamber of the Roots gas flow meter to the mechanical meter core counting mechanism (2); the mechanical meter core counting mechanism (2) converts the rotational speed signal into a flow rate value through gear transmission and performs mechanical display; The built-in sensing mechanism (3) includes a pulse sensing component, a pressure sensing component and a temperature sensing component. The pipeline of the built-in sensing mechanism (3) is built into the housing part (1). The pulse sensing component collects the rotor speed pulse signal. The pressure sensing component and the temperature sensing component collect the pressure signal and temperature signal of the gas in the pipeline respectively and transmit them to the integrator to perform standard flow calculation.

2. The watch movement counting sensor mechanism according to claim 1, characterized in that, The shell portion (1) includes a first layer plate (26), a second layer plate (31), a third layer plate (44), a plurality of first pillars (32) and a plurality of second pillars (43); The first layer plate (26), the second layer plate (31) and the third layer plate (44) are arranged in parallel. The first layer plate (26) and the second layer plate (31) are fixedly connected by the first support column (32), and the second layer plate (31) and the third layer plate (44) are fixedly connected by the second support column (43) to form an internal space for accommodating the mechanical watch movement counting mechanism (2) and the built-in sensing mechanism (3). The third layer plate (44) is machined with holes to pass through the sensing components in the built-in sensing mechanism (3); The housing part (1) also includes a head cover (6) and a sensor cover (7), the head cover (6), the sensor cover (7), the third layer plate (44) are fixedly connected by a first screw (5) and the front cover (12).

3. The watch movement counting sensor mechanism according to claim 2, characterized in that, Both ends of the first support column (32) are machined with steps and threaded holes, and the first layer plate (26) and the second layer plate (31) are machined with corresponding through holes; One end of the second support column (43) is provided with a step, and the other end of the second support column (43) is machined with a step and a threaded hole. The second support column (43) is riveted to the third layer plate (44), and the second support column (43) is fixedly connected to the second layer plate (31) by screws. The first layer plate (26) has process holes for mounting screws; The housing part (1) is fixedly installed on the front cover (12) of the metering chamber of the Roots gas flow meter by the first screw (5). The front cover (12) is provided with an oil window (13) and an oil plug (14).

4. The watch movement counting sensor mechanism according to claim 1, characterized in that, The magnetic coupling device (4) includes a spacer (15), a first magnet sleeve (19), and a signal disk (18); The spacer (15) is fixedly installed on the front cover (12) of the metering chamber body of the Roots gas flow meter by the third screw (16); The first magnet sleeve (19) is fixedly installed on the rotor shaft inside the metering chamber of the Roots gas flow meter, and the signal disk (18) is fixedly connected to the first magnet sleeve (19) by the fourth screw (17). The signal disk (18) is a circular component. Several blind holes are evenly arranged on the edge of the signal disk (18). A magnet is inserted into each blind hole. The position of the magnet corresponds to the center position of the pulse sensing component.

5. The watch movement counting sensor mechanism according to claim 2, characterized in that, The mechanical watch core counting mechanism (2) includes a drive shaft (35), a second magnet sleeve (42), a first gear set (29), a second gear set (38), and a counter (27); The drive shaft (35) passes through the first layer plate (26), the second layer plate (31) and the third layer plate (44). A second magnet sleeve (42) is installed at one end of the drive shaft (35). A blind hole is machined on the second magnet sleeve (42). A magnet is interference-fitted to the second magnet sleeve (42) to sense the magnetic signal of the magnetic coupling device (4) and drive the drive shaft (35) to rotate. The other end of the drive shaft (35) extends beyond the first layer plate (26), and the first yin-yang plate (331) is fixedly installed on the drive shaft (35) by a nut.

6. The watch movement counting sensing mechanism according to claim 5, characterized in that, The first gear set (29) includes several riveted gears in pairs, and the first gear set (29) is installed on the first shaft (28) and the second shaft (30) with clearance fit. The first shaft (28) and the second shaft (30) are arranged in parallel, and the two ends of the first shaft (28) and the second shaft (30) are respectively in clearance fit with the copper sleeves riveted on the first layer plate (26) and the second layer plate (31); A drive gear (34) is fixedly mounted on the drive shaft (35). The drive gear (34) meshes with the first disc gear in the first gear set (29) to achieve speed reduction transmission through the first gear set (29).

7. The watch movement counting sensor mechanism according to claim 6, characterized in that, The second gear set (38) includes three disc gears, which are respectively fitted with three third shafts (36) with clearance fit. One end of each of the three third shafts (36) is riveted to the first layer plate (26). One end of the first shaft (28) extends beyond the first layer plate (26), and a first transmission gear (39) is fixedly mounted on the first shaft (28). The first transmission gear (39) meshes with the plate gear in the second gear set (38). The second gear set (38) realizes the forward or reverse counting of the counter (27) through the set gear meshing direction.

8. The watch movement counting sensor mechanism according to claim 7, characterized in that, The counter (27) includes a fourth shaft (45), a fifth shaft (46), several counting gears (47), and several auxiliary gears (48); The fourth shaft (45) and the fifth shaft (46) are arranged in parallel, and the two ends of the fourth shaft (45) and the fifth shaft (46) are respectively in clearance fit with the copper sleeves riveted on the first layer plate (26) and the second layer plate (31); A second transmission gear (37) is fixedly installed on the fourth shaft (45). The second transmission gear (37) meshes with the plate gear in the second gear set (38). A plurality of the counting gears (47) are also installed on the fourth shaft (45) with clearance fit. A plurality of auxiliary gears (48) are fitted on the fifth shaft (46) with clearance fit, and each auxiliary gear (48) meshes with two adjacent counting gears (47); One end of the fourth shaft (45) extends beyond the first layer plate (26), and the second yin-yang plate (332) is fixedly installed on the fourth shaft (45) by a nut; Each of the counting gears (47) has ten numbers from 0 to 9 evenly distributed on its outer circumference. One side in the thickness direction is provided with 20 teeth, and the other side is provided with a flange that protrudes outward and is concave inward. A small raised groove is provided on the flange. Each of the auxiliary gears (48) is provided with 8 teeth, and the 8 teeth are arranged in pairs with two thicknesses; When the first counting gear (47) rotates to the position of its raised groove close to the first auxiliary gear (48), the high teeth of the first auxiliary gear (48) fall into the raised groove, driving the first auxiliary gear (48) to rotate, thereby driving the second counting gear (47) to rotate to achieve carry counting; It also includes a counting gear retaining ring (23), which is an irregularly shaped copper sheet. The counting gear retaining ring (23) has an irregularly shaped hole in the middle and four flanges on its edge. A small groove is machined on the fourth shaft (45) corresponding to the position of the first counting gear (47). The counting gear retaining ring (23) is fitted into the small groove and fixedly connected to the fourth shaft (45) through the irregular hole. The first counting gear (47) has four slots machined on its teeth. The four flanges of the counting gear retaining ring (23) are respectively inserted into the four slots, so that the first counting gear (47) rotates synchronously with the fourth shaft (45).

9. The watch movement counting sensing mechanism according to claim 1, characterized in that, The pulse sensing component includes a pulse sensor (11), the pressure sensing component includes a pressure sensor (8), and the temperature sensing component includes a temperature sensor (9). The pulse sensor (11), the pressure sensor (8), and the temperature sensor (9) are all fixedly mounted on the front cover (12); The totalizing component is screwed to the outside of the housing part (1), and the pulse sensor (11), the pressure sensor (8) and the temperature sensor (9) are all electrically connected to the totalizing component through built-in pipelines; The temperature sensor (9) is a shaft-like rod with an internally sealed temperature sensing element, which is installed on the front cover (12) by a threaded connection. The pulse sensor (11) is a tubular part with a flange at one end and closed at the other end; a pulse sensing element is installed in the internal space of the pulse sensor (11), and a through hole is machined on the flange of the pulse sensor (11). The pulse sensor (11) is fixedly installed on the front cover (12) by the second screw (10). The pressure sensor (8) includes a pressure wire (20), a pressure sensing element (21), and a sheath (22); the pressure sensing element (21) is installed inside the sheath (22), the pressure wire (20) is used to fix the pressure sensing element (21) inside the sheath (22), and the sheath (22) is fixedly installed on the front cover (12).

10. The watch movement counting sensing mechanism according to claim 8, characterized in that, The third layer plate (44) is riveted with a bearing housing (41), and the drive shaft (35) is stably assembled through the bearing housing (41) and the bearing (25) on the first layer plate (26); The bearing (25) is axially positioned by the fifth screw (24); It also includes a counter baffle (40), which is manually wound around the first support (32), and the counter baffle (40) is provided with a window for displaying the flow rate value on the counter (27); All gears in the mechanical watch movement counting mechanism (2) are standard spur gears with a tooth profile angle of 20 degrees, and are made of all-copper material. The drive shaft (35), the first shaft (28), the second shaft (30), the third shaft (36), the fourth shaft (45), and the fifth shaft (46) are all made of carbon steel. All shafts are machined with several axial retaining ring grooves and positioning pin holes or steps for the installation and positioning of the shafts, plates, and gears.

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