CN107741259B

CN107741259B - Flow metering control system for pre-selling water gas and prepayment meter with same

Info

Publication number: CN107741259B
Application number: CN201711170344.7A
Authority: CN
Inventors: 陈健; 何国忠; 黎涛
Original assignee: Shenzhen Jiexian Digital Technology Co ltd
Current assignee: Shenzhen Jiexian Digital Technology Co ltd
Priority date: 2017-11-22
Filing date: 2017-11-22
Publication date: 2023-12-26
Anticipated expiration: 2037-11-22
Also published as: CN107741259A

Abstract

A flow metering control system for pre-sold water and gas which is accurate in metering, easy to set and capable of effectively improving management of water or gas meters and a prepayment meter with the flow metering control system. The automatic flow meter comprises a base frame assembly, a pre-selling flow setting mechanism, a character wheel set mechanism for displaying the pre-selling flow and a meter for accumulating the actual consumption of the pre-selling flow. The water-gas flowmeter keeps the original counter for accumulating the actually consumed flow, and a metering mechanism and a valve executing mechanism for pre-selling the flow are prolonged on the basis of the traditional mechanical meter; the data of the forward accumulation of the meter and the reverse accumulation of the pre-sale flow setting meter are strictly synchronous; through special pre-selling flow recharging mechanism, the device is interlocked with the user meter, thus effectively avoiding the phenomenon of illegal selling flow in structure and reliably completing the pre-payment function of the user meter; the special pre-selling flow setting meter and the common meter are separately arranged and adopt a pure mechanical structure, no electronic device is adopted, the reliability is high, and the counting is accurate.

Description

Flow metering control system for pre-selling water gas and prepayment meter with same

Technical Field

The utility model relates to a water or gas meter, in particular to a prepayment meter capable of pre-selling water or gas flow.

Background

Prepaid water meters are mainly of two types:

1. the traditional mechanical meter is additionally provided with an IC card control module and a battery prepaid meter.

2. The remote meter with the electronic module is additionally arranged by the traditional mechanical meter, so that prepayment can be indirectly realized. The intelligent water-gas meter can be used for realizing the functions of meter reading and payment to a great extent without entering the home, but the functions of meter reading and prepayment can be realized by supplying power to the intelligent water-gas meter without exception. Particularly, once the added module electronic components or the battery fail and other reasons can cause the water-gas meter to work abnormally, accumulated data or stored data can be lost, the personal interests of users or water and gas supply enterprises are seriously damaged, and unnecessary disputes are caused.

At present, the mechanical prepayment water meter on the market has the problems of low accuracy and reliability of water or gas pre-sale quantification and the like, and cannot meet the expected requirement in practical application.

In summary, two general categories (water meters are described below):

1. the Chinese patent application (application number 201520397379.4, named as a mechanical visual quantitative water vending meter) has the following problems:

a. The quantitative water selling subtraction metering is linked with the gear of the forward metering of the water meter, but the quantitative water selling is in pointer conversion instead of strict gear conversion, so that the data of the forward metering of the water meter and the quantitative water selling reverse metering cannot be kept synchronous, and in practice, disputes are caused to user consumption.

b. The water selling quantification is manually operated, and subjective or objective illegal water selling behaviors cannot be effectively stopped.

2. The Chinese patent application (application number 201410220188.0, named as "passive remote intelligent Water meter") has the following problems:

a. since there is no water accumulation counter, in a strict sense, this is not a water meter, but a quantitative water vending machine;

b. the recharging mechanism is integrated, so that the trouble caused by electronic faults cannot be removed;

c. the action randomness is larger, and the structural stability of the closed valve is poor.

Disclosure of Invention

The invention aims to solve the technical problem of providing a flow metering control system of pre-sold water vapor, which has accurate metering, is easy to set and can effectively improve the management of a water or gas meter, and a prepayment meter with the flow metering control system.

In order to solve the technical problems, the invention adopts the following technical scheme:

The invention relates to a precise metering system for pre-selling water gas flow, which comprises a base frame assembly, a pre-selling flow setting mechanism, a character wheel set mechanism for displaying the pre-selling flow and a meter for accumulating the actual consumption of the pre-selling flow, and is characterized in that: the character wheel set mechanism consists of a pre-selling flow meter digital wheel set and a cone for driving a unit character wheel in the pre-selling flow meter digital wheel set to rotate through a wheel shaft;

a cylindrical worm wheel is arranged between the cone and the pre-selling flow setting mechanism, the worm wheel consists of a worm wheel part, an upper gear and a lower gear which are arranged at the upper end and the lower end of the worm wheel part and have the same structure and size, the worm wheel part is meshed with the cone, the upper gear is meshed with a preset quantity gear component in the pre-selling flow setting mechanism, and the lower gear is meshed with a consumption gear component in the meter;

the ratio of the angular velocities of the upper gear and the unit character wheels in the pre-sold flowmeter digital wheel set is equal to the ratio of the angular velocities of the lower gear and the unit character wheels in the actual flowmeter digital wheel set in the meter;

the rotation direction of the upper gear corresponding to the digit reverse rotation of the unit character wheel in the digit wheel group of the pre-selling flowmeter is the same as the rotation direction of the lower gear corresponding to the digit forward rotation of the unit character wheel in the digit wheel group of the actual flowmeter.

The preset quantity gear assembly consists of a main drive gear set and a variable ratio gear set which are arranged between an upper clamping plate and a middle clamping plate in the base frame assembly, wherein,

the main driving gear set consists of a top shaft, a bottom wheel and a top wheel, wherein the bottom wheel and the top wheel are sleeved on the top shaft, the upper end surface of the top shaft can be connected with the preset quantity control part arranged on the upper clamping plate, and the bottom wheel and the top wheel are unidirectional rotating wheels with opposite steering directions;

the gear ratio gear set consists of a transmission gear which rotates in one direction and a driving worm gear which is coaxially arranged with the transmission gear and can rotate in the opposite direction, and the transmission gear drives the driving worm gear to rotate in the same direction;

the bottom wheel is meshed with the transmission gear, and the worm driving gear is meshed with the upper gear.

The lower gear is meshed with a consumption gear assembly in the meter through a displaceable intermediate gear which can be meshed with or disengaged from the lower gear.

The preset quantity control component can be a manual control screw rod, a mechanical control screw rod or a remote control setting mechanical control screw rod.

The invention discloses a pre-selling water gas flow control system, which comprises a base frame assembly, a pre-selling flow setting and metering mechanism and a flow outlet valve control mechanism, and is characterized in that: the pre-selling flow setting and metering mechanism is the accurate metering system of the pre-selling water gas flow, the flow outlet valve control mechanism consists of a valve capable of opening or closing a flow outlet in the pre-selling water gas flow control system, a valve opening setting mechanism, a valve locking mechanism, a valve closing mechanism and a valve self-locking mechanism, wherein,

The base frame assembly comprises an upper clamping plate, a middle clamping plate, a lower clamping plate, a rotary table and a sealing bottom plate from top to bottom, wherein the rotary table is clamped between the lower clamping plate and the sealing bottom plate and can rotate for a set angle;

the valve is arranged below the sealing strip bottom plate and is connected with a valve center control gear in the valve opening setting mechanism through a door handle and a door shaft, the sealing strip bottom plate, the rotary table, the lower clamping plate and the valve center control gear are sleeved on the door shaft, and a spring capable of enabling the valve to be opened and closed is arranged between the sealing strip bottom plate and the rotary table;

the valve opening setting mechanism consists of a transition gear, a central gear, a valve locking gear, a transfer gear, a gear transmission group and a valve central control gear, wherein the transition gear, the central gear, the valve locking gear, the transfer gear, the gear transmission group and the valve central control gear are respectively arranged on the middle clamping plate; the top wheel is reversely rotated with the bottom wheel which is in the main driving gear set and is in unidirectional rotation, namely the spring can be tightened through the transition gear, the central gear, the valve locking gear, the switching gear, the gear transmission set and the valve central control gear, and the valve can be rotated to a set opening degree;

The valve locking mechanism consists of the central gear, a valve locking gear, a rocker arm arranged on a lower clamping plate, a lock pin, a pin disc and a pin plate arranged at the end part of the pin disc, wherein the valve locking gear is arranged on the rocker arm, the lower end of the lock pin can be clamped on the mouth of an arm gulf on the rocker arm and enables the valve locking gear to be meshed with the lower shaft wheel of the central gear which can only rotate unidirectionally, the upper end of the lock pin passes through the lock pin spring, a pin through hole arranged on the pin plate is connected with the lower end of the unlocking hook, and when the valve locking gear is meshed with the lower shaft wheel of the central gear, the spring is prevented from releasing energy through the transfer gear, the gear transmission group and the valve central control gear;

the valve closing mechanism consists of an unlocking pressing handle, a buckling disc column hook arranged on the rotary disc, a bolt disc of the arc wedge-shaped part, the rotary disc, a spring and a valve, wherein one end of the unlocking pressing handle is connected with the upper end of the unlocking hook and can lift the unlocking hook to enable the lower end of the lock pin to be separated from the mouth of the arm; when the lock pin is pulled up by the unlocking hook and separated from the mouth of the arm gulf and a rocker arm pushing block on the turntable releases the compression on a barrel column which is arranged at the front part of the rocker arm and extends downwards, the valve locking gear is disengaged from a lower shaft wheel of the central gear to unlock, and the spring releases energy to enable the valve to be closed;

The valve self-locking mechanism is composed of a rotary table, a rocker arm push block arranged on the rotary table, a buckling disc column hook and a cylinder column, wherein the hook part of the buckling disc column hook slides along the wedge-shaped upper edge of the bolt disc along with the rotation of the rotary table, after the spring releases energy and enables the valve to be completely closed, the hook part of the buckling disc column hook presses down the bolt disc and when the rocker arm push block is tightly pressed onto the cylinder column, the lock pin is clamped on the arm opening under the action of the lock pin spring, so that the lock valve gear is meshed with the lower shaft wheel of the central gear to be automatically locked, and the spring releases energy to enable the valve to be closed.

The opening degree is 0-90 degrees.

The central gear is a gear which rotates anticlockwise in one direction, and the gear is respectively an upper shaft wheel, a middle shaft wheel, an idler wheel and a lower shaft wheel from top to bottom, the upper shaft wheel and the middle shaft wheel are of an integrated structure, and the upper shaft wheel rotates anticlockwise to drive the idler wheel and the lower shaft wheel to rotate in the same direction.

The plug pin plate is provided with a plurality of columnar vertical pins in parallel, the upper ends of the vertical pins are arranged in corresponding pin holes on the middle clamping plate, and when a pre-selling flowmeter digital wheel set in the precise metering system of pre-selling water gas flow returns to zero, a groove which can enable the upper ends of the vertical pins to be inserted is formed in the position, opposite to the pin holes, of each side of each counting character wheel set.

A front push block and a rear push block are arranged on the rotary table at the front side of the buckling disc column hook, a gap is formed in the lower clamping plate and close to the bolt disc, a base which is arranged on the rotary table and can be shifted in the gap is arranged in the gap, the intermediate wheel in the accurate metering system of the pre-sold water gas flow is arranged on the base, and when the rear push block rotates along with the rotary table clockwise to be far away from the base, the base shifts backwards under the compression of the front push block, and the intermediate wheel is meshed with the lower gear of the worm wheel in the accurate metering system of the pre-sold water gas flow; when the front push block rotates anticlockwise along with the turntable and is far away from the base, the base is forwards shifted under the compression of the rear push block, and the intermediate wheel is disengaged from a lower gear of a worm wheel in the accurate metering system for the pre-sold water gas flow.

The invention relates to a water-gas prepayment meter, which comprises a meter shell, an inlet cavity and an outlet cavity, wherein the meter shell is respectively provided with a meter for recording the actual consumption of flow and a pre-selling flow setting meter, the inlet cavity is connected with a flow inlet of the water-gas prepayment meter through a impeller group or a gas character wheel group, and the inlet cavity is communicated with the outlet cavity, and is characterized in that: the pre-selling flow setting meter is the pre-selling water vapor flow control system, the pre-selling water vapor flow control system is connected with the meter through a scale wheel arranged in the pre-selling water vapor flow control system, the scale wheel consists of a sleeve shaft, a driven gear and a driving gear, the driven gear and the driving gear are arranged at the upper end and the lower end of the sleeve shaft and have the same structural size, the driving gear is meshed with a consumption gear assembly in the meter, and the driven gear is meshed with a lower gear of a worm wheel in the pre-selling water vapor flow control system when a valve in the pre-selling water vapor flow control system is in an open state.

Compared with the prior art, the invention has the following advantages: 1) The water-gas flowmeter keeps the original counter for accumulating the actually consumed flow, and is a metering mechanism and a valve executing mechanism for extending the pre-sold flow on the basis of the traditional mechanical meter; 2) The data of the forward accumulation of the metering table and the reverse accumulation of the pre-sale flow setting table are strictly synchronous, so that the possible consumption disputes of users are thoroughly eliminated; 3) Through purpose-made pre-selling flow recharging mechanism, interlocking connection with the user meter, illegal selling flow phenomenon is effectively eradicated structurally, and the pre-payment function of the user meter is reliably completed. 4) The special pre-selling flow setting meter is separated from the common meter, adopts a pure mechanical structure, has no any electronic device, has high reliability, and is suitable for any working condition; 5) The payment meter follows strict mechanical movement logic from recharging, using to closing, and has accurate, reliable and in-place action and accurate counting.

Drawings

Fig. 1 is a schematic external view of a prepaid meter according to the present invention.

Fig. 2 is a schematic view of the prepaid meter of fig. 1 with a predetermined amount control unit attached to the upper cover.

FIG. 3 is a schematic plan view of an assembled meter and pre-market flow rate setting meter mounted within the housing of FIG. 1.

FIG. 4 is a schematic diagram of a pre-sell water flow control system (also referred to as a pre-sell flow schedule) according to the present invention.

Fig. 5 is a schematic view of the control system of fig. 4 after the upper clamping plate is uncovered.

Fig. 6 is a schematic view of the middle clamp plate of fig. 5 with the upper components removed.

Fig. 7 is a schematic view of fig. 6 with the middle clamping plate removed.

Fig. 8 is a schematic view of fig. 5 with the upper and lower clamping plates removed.

Fig. 9 is a schematic diagram of another state of fig. 8.

Fig. 10 is an exploded view of fig. 4.

Fig. 11 is a schematic view of a turntable.

Fig. 12 is a schematic view of a worm wheel.

Fig. 13 is a schematic view of a scale wheel.

Fig. 14 is a schematic view of the base of the intermediate wheel.

Fig. 15 is a schematic diagram of a character wheel set.

Fig. 16 is a schematic view of a rocker arm.

Fig. 17 is a schematic view of a latch plate.

The reference numerals are as follows:

the pre-selling flow meter digital wheel set 1, the wheel shaft 11, the character wheel 12, the groove 13, the wheel 14, the cone 15, the pre-selling flow rate setting mechanism 2, the main driving gear set 21, the top shaft 211, the bottom wheel 212, the top wheel 213, the ratio gear set 22, the transmission gear 221, the driving worm gear 222, the worm wheel 3, the worm wheel part 31, the upper gear 32, the lower gear, the transition gear 41, the central gear 42, the on-shaft wheel 421, the on-shaft wheel 422, the idle wheel 23, the off-shaft wheel 424, the valve locking gear 43, the transfer gear 44, the gear transmission set 45, the first gear 451, the second gear 452, the third gear 453, the fourth gear 454, the valve central gear 46, the rocker arm 5, the arm opening 51, the rotary positioning hole 52, the fixed arm post 53, the barrel post 54, the post shaft 55, the lock pin 6, the lock pin 61, the latch disc 7 circular arc wedge 71, pin plate 72, vertical pin 75, pin hole 76, top coil spring 77, pull coil spring 78, rotary disk 8, buckle post hook 81, hook 82, rocker arm push block 83, front push block 84, rear push block 85, intermediate wheel 9, base 91, quill 92, driven gear 93, drive gear 94, pull seat spring 95, pay meter 100, meter 101, pre-market flow setting meter 102, watch case 103, meter cover 104, pre-set amount control component 105, valve 106, valve base 1061, door knob 1062, rubber valve 1063, door shaft 1064, flow inlet tube 107, flow outlet tube 108, display window 109, upper clamp plate 201, middle clamp plate 202, lower clamp plate 203, seal bottom plate 204, cavity 205, spring 206, unlocking hook 207, unlocking lever 208, unlocking lever 209.

Detailed Description

1. Water-gas prepayment meter 100

The water-gas prepayment meter 100 (hereinafter referred to as payment meter 100) of the present invention is a water meter alone or a gas meter alone. The meter 101 which is used by a common user and can record the actual consumption of the water vapor flow (hereinafter referred to as flow) is connected together in an interlocking way through the specially designed pre-selling flow setting table 102, so that the water vapor flow pre-payment function of the user can be reliably completed by effectively avoiding illegal water selling or gas selling (such as fuel gas) structurally.

The payment meter 100 of the present invention is implemented as a purely mechanically driven meter 101 that achieves the goal of accurate metering statistics for pre-sold water flow settings.

As shown in fig. 1 to 3, the payment meter 100 comprises a meter case 103 and a meter cover 104, wherein two cavities are arranged in the meter case 103 in parallel front and back, the cavity connected with a flow inlet pipe 107 of the payment meter 100 is called an inlet cavity, and a meter 101 for recording the actual consumption of the flow is arranged in the inlet cavity; the cavity that interfaces with the flow outlet tube 108 of the payment meter 100 is referred to as the outflow cavity, and the pre-sales flow rate setting meter 102 is installed in the outflow cavity.

The inlet chamber is communicated with the outlet chamber, a platform is arranged at the bottom of the outlet chamber, a flow outlet is arranged at the side of the platform (the flow outlet is connected with a flow outlet pipe 108 of the payment meter 100, when the payment meter is an air consumption meter, a flow outlet and valve structure which is used for ensuring safety in the air consumption meter in the prior art is adopted), a valve 106 which can rotate for 0-90 degrees is arranged at the bottom of the pre-selling flow setting meter 102, the valve 106 is set to be 0 degrees in a state of completely closing the flow outlet, and correspondingly, the valve 106 is set to be 90 degrees in a state of completely opening the flow outlet. The position of the valve 106 is varied in the range of 0-90 degrees by the release or tightening of the spring 206 connected thereto.

The preset flow rate setting table 102 is set by a preset flow rate control unit 105 (the preset flow rate control unit 105 may be a manual screw, a mechanical screw or a remote control setting mechanical screw) held by a professional manager, and then the flow rate discharge port is opened by rotating a valve 106, and at this time, the preset flow rate setting table 102 and the meter 101 are connected and linked by a scale wheel 9.

The intermediate wheel 9 (see fig. 7 and 13) is composed of a quill 92, and a driven gear 93 and a driving gear 94 which are provided at upper and lower end portions of the quill 92 and have the same structural dimensions, and the driven gear 93 and the driving gear 94 are preferably spur gears. The driving gear 94 is meshed with a consumption gear assembly (not shown in the figure, which is a prior art) in the meter 101, the driven gear 93 is meshed with the lower gear 33 of the worm wheel 3 in the pre-selling flow rate setting table 102 when the valve 106 is in the state of opening the flow rate discharge port, and the rotation of the lower gear 33 drives the worm wheel part 31 of the worm wheel 3 to be linked with the pre-selling flow rate digital wheel set 1 in the pre-selling flow rate setting table 102, so that the linkage between the meter 101 and the pre-selling flow rate setting table 102 is realized.

Working principle:

after the pre-selling water gas flow is recharged under the operation of a full-time manager or through a mobile phone provided with relevant APP application software (at this time, the preset quantity control part 105 is a machine-controlled screw rod set by wireless remote control), the recharge quantity is converted into an actual sales quantity (namely, the purchased flow quantity is displayed on the pre-selling flow meter digital wheel set 1 of the pre-selling flow rate setting table 102). The valve 106 is rotated to an opening of 90 degrees, the flow discharge port is opened, the meter 101 starts counting in the forward direction, and the intermediate wheel 9 coupled thereto counts in the reverse direction in synchronization with the pre-sales flow rate setting table 102. The forward and reverse conversion of the two groups of counting wheels is realized, so that the data of the forward accumulation of the meter 101 and the reverse accumulation and subtraction of the pre-selling flow setting table 102 are strictly synchronous, a user can intuitively see whether the consumption of the metering flow is accurate, the consumption traceability is realized, the user requirements are met, and the user experience is improved; when the flow counter measures and reduces to zero, the spring 206 is triggered to zero the opening of the valve 106, namely the flow outlet is automatically closed. To this end, a complete cycle of pre-selling water or gas in metered amounts is completed.

2. Pre-sale flow rate setting meter 102

The pre-sell flow setting meter 102, also known as a pre-sell water flow control system, employed in the aforementioned payment meter 100 is comprised of a base assembly, a pre-sell flow setting metering mechanism, and a flow outlet valve control mechanism.

1. Base frame assembly

As shown in fig. 4-10, the rotary table 8 is composed of an upper clamping plate 201, a middle clamping plate 202, a lower clamping plate 203, a rotary table 8 (see fig. 11) and a sealing bottom plate 204 from top to bottom, and the rotary table 8 is clamped between the lower clamping plate 203 and the sealing bottom plate 204 and can rotate by 0-90 degrees. A plurality of positioning hole columns are arranged between the upper adjacent clamping plates and the lower adjacent clamping plates and are fixed together by screws, and similarly, the lower clamping plates 203 and the bottom sealing plate 204 are also fixed by screws.

A concave cavity 205 is arranged on the sealing bottom plate 204 at the middle position, a spring 206 made of spring steel is tightly embedded in the concave cavity 205, one end of the spring 206 is fixedly sleeved on a positioning column on the sealing bottom plate 204, after the spring 206 is wound on a door shaft 1064 of the valve 106 for a plurality of times, the other end of the spring 206 is fixedly connected on the door shaft 1064, and the spring 206 can be tightened or loosened by rotating the door shaft 1064.

The cross-sectional shape of the shaft 1064 may be elliptical, triangular, or square, which facilitates the rotation of the turntable 8 over the shaft 1064 in unison with the shaft 1064.

2. Pre-selling flow setting metering mechanism

The pre-selling flow setting and metering mechanism is also called a precise metering system of pre-selling water gas flow, and is the core content of the invention. The device consists of a character wheel set mechanism for displaying the pre-selling flow and a pre-selling flow setting mechanism 2.

1) Character wheel group mechanism

As shown in fig. 4, 5, 8, 9 and 10, the character wheel set mechanism is composed of a pre-sale flowmeter digital wheel set 1 and a roller 15 for driving a unit character wheel 12 in the pre-sale flowmeter digital wheel set 1 to rotate through a wheel shaft 11.

The pre-sale flow meter digital wheel set 1 is arranged between the upper clamping plate 201 and the middle clamping plate 202, and is a digital wheel set displaying one, ten and hundred three digits, and each digit corresponds to one digital wheel 12 which can rotate around the wheel shaft 11 and display 0-9 digits (which can be observed through the digital display window 109). The unit character wheel 12 rotates forward by one turn, the tens character wheel 12 displays the number one increment, and similarly, the tens character wheel 12 rotates forward by one turn, and the hundreds character wheel 12 displays the number one increment. Conversely, when the lower print wheel 12 rotates one turn in the opposite direction, the adjacent higher print wheel 12 is reduced by one number. The dynamic change is realized by a four-eight tooth rotating wheel 14 arranged on the outer side of two adjacent character wheels 12, and the structure is the conventional structure.

The gear wheel 15 is fixedly sleeved at one end of the wheel shaft 11, and the other end of the wheel shaft 11 sequentially penetrates through the hundred-bit character wheel 12, the ten-bit character wheel 12 and the unit character wheel 12 to be exposed outside. Rotation of the cone 15 causes the unit print wheel 12 to rotate therewith.

2) Pre-selling flow rate setting mechanism 2

As shown in fig. 2, 5, 9, 10, which is constituted by the preset amount control section 105 and the preset amount gear assembly.

a. The preset amount control unit 105 is the preset amount control unit 105 described in the above item "first", and is an external operation tool, by which the amount of the preset flow rate can be set.

b. Gear assembly with preset quantity

Which is composed of a main drive gear set 21 and a gear ratio gear set 22 installed between an upper clamping plate 201 and a middle clamping plate 202.

The main driving gear set 21 is composed of a top shaft 211, a bottom wheel 212 and a top wheel 213 which are sleeved on the top shaft 211, a slot which is shaped like a Chinese character 'yi' or a Chinese character 'cross' is arranged on the upper end surface of the top shaft 211, and the slot can be connected with the preset quantity control part 105.

The bottom wheel 212 and the top wheel 213 are spur gears rotating in one direction, the bottom wheel 212 and the top wheel 213 rotate in opposite directions, and if the top shaft 211 rotates in the forward direction (when seen from the upper clamping plate 201 downwards, for example, rotates clockwise), the bottom wheel 212 rotates along with the top wheel 213 does not rotate; conversely, if rotated in the reverse direction, the top wheel 213 rotates with it, while the bottom wheel 212 does not.

The gear set 22 is composed of a unidirectional rotation transmission gear 221 and a driving gear 222 which is coaxially arranged with the transmission gear 221 and can rotate positively and negatively, and the driving gear 222 is positioned above the transmission gear 221. When the transmission gear 221 rotates unidirectionally, it can drive the worm driving gear 222 to rotate in the same direction; when the worm gear 222 rotates in the opposite direction to the transmission gear 221, the transmission gear 221 is blocked from rotating.

The bottom wheel 212 of the main drive gear set 21 meshes with the transfer gear 221 of the ratio gear set 22.

3) Worm wheel 3

Which is a coupling part between the character wheel set mechanism and the pre-sales flow setting mechanism 2, a flow pre-sales setting is achieved by means of the worm wheel 3.

The worm wheel 3 is mounted between the upper clamp plate 201 and the middle clamp plate 202. The external shape of the gear is cylindrical, and the gear is composed of a worm wheel part 31 integrally formed, an upper gear 32 and a lower gear 33 arranged at the upper end part and the lower end part of the worm wheel part 31, wherein the upper gear 32 and the lower gear 33 are straight gears and have the same structure and size (see fig. 12).

The worm wheel 31 is engaged with the cone 15, and the upper gear 32 is engaged with the worm drive gear 222. The lower gear 33 is in turn meshed with the driven gear 93 of the intermediate wheel 9 described in the gauge 101 in the above "first" item.

Working principle:

the top shaft 211 in the main driving gear set 21 is rotated in the forward direction, the bottom wheel 212 rotates in the forward direction, the transmission gear 221 in the gear ratio gear set 22 meshed with the bottom wheel 212 rotates in the reverse direction, the worm driving gear 222 rotating synchronously with the transmission gear 221 rotates the upper gear 32 of the worm wheel 3 meshed with the upper gear 32 in the forward direction, and the worm wheel part 31 rotating in the forward direction drives the cone 15 meshed with the worm wheel to rotate, so that the digits in the pre-selling flowmeter digit wheel set 1 rotate in the forward direction (i.e. accumulate).

4) Features of the pre-sale flow-rate setting metering mechanism

a. The ratio of the angular velocity of the upper gear 32 to the angular velocity of the unit character wheel 12 in the pre-sold flowmeter digital wheel set 1 is equal to the ratio of the angular velocity of the lower gear 33 to the angular velocity of the unit character wheel in the actual flowmeter digital wheel set in the meter 101.

That is, the actual consumption of the flow rate in meter 101 is equal to the decrease in the pre-sales flow rate.

b. The rotation direction of the upper gear 32 corresponding to the reverse rotation of the digits of the unit characters 12 in the preset flowmeter digit wheel set 1 is the same as the rotation direction of the lower gear 33 corresponding to the forward rotation of the digits of the unit characters in the actual flowmeter digit wheel set.

That is, the pre-sales flow rate set point is synchronously decremented as the actual flow rate consumption value is incremented.

3. Flow outlet valve control mechanism

As shown in fig. 3-10, it consists of a valve 106 that can open or close the flow outlet in the pay table 100, a valve opening setting mechanism, a valve locking mechanism, a valve closing mechanism, a valve locking mechanism, and a pre-sales return-to-zero locking mechanism.

1) Valve 106

As described in the previous "first" section, the valve 106 is disposed below the sealing bottom plate 204, and is composed of a rubber valve 1063, a valve base plate 1061, and a door handle 1062.

The rubber valve 1063 is elastically mounted on the valve base plate 1061 in a manner of moving up and down, the valve base plate 1061 is fixedly connected with the door handle 1062, the door handle 1062 is fixedly sleeved on the door shaft 1064, and the door shaft 1064 passes through the spring 206, the turntable 8 and the lower clamping plate 203 to be fixedly connected with the valve center control gear 46 in the valve opening setting mechanism.

Rotating the valve center gear 46 rotates the door shaft 1064 and the turntable 8, and simultaneously tightens or releases the spring 206, and the corresponding door handle 1062 drives the valve base plate 1061 to rotate the rubber valve 1063 from 0 degrees to 90 degrees (corresponding to the tightened spring 206, i.e., the flow discharge port is opened), or from 90 degrees to 0 degrees (corresponding to the released spring 206, i.e., the flow discharge port is closed by the rubber valve 1063).

2) Valve opening setting mechanism

As shown in fig. 7, 8 and 10, the valve opening setting mechanism is composed of, in order from the top wheel 213 to the door shaft 1064 position in the pre-sales flow rate setting metering mechanism at point "2" in this item, a transition gear 41 mounted on the intermediate plate 202, a hub gear 42 mounted between the upper plate 201 and the lower plate 203, a lock valve gear 43 mounted between the lower plate 203 and the intermediate plate 202, a transfer gear 44, a gear train 45 and the valve center gear 46.

The transition gear 41 is meshed with the top wheel 213 and the upper shaft wheel 421 of the central gear 42, respectively, the top wheel 213 is a unidirectional rotation gear, which is coupled with the bottom wheel 212 in a manner of being overlapped on top of each other through the top shaft 211, and in the present invention, the top shaft 211 is rotated in the forward direction (clockwise direction when seen from the upper clamping plate 201), the bottom wheel 212 is rotated, and the top wheel 213 is not rotated; the top shaft 211 is rotated in the reverse direction, and the top wheel 213 is rotated in the reverse direction, and at this time, the bottom wheel 212 is not rotated. That is, rotating the top wheel 213 in reverse rotates the transition gear 41 in a forward direction, which in turn rotates the on-shaft wheel 421 of the sun gear 42 in a reverse direction.

The central gear 42 is a unidirectional rotation gear, which can only rotate anticlockwise (seen from top to bottom), and is respectively an upper shaft wheel 421, a middle shaft wheel 422, an idle wheel 423 and a lower shaft wheel 424 from top to bottom, wherein the upper shaft wheel 421 and the middle shaft wheel 422 are integrally formed, and when the upper shaft wheel 421 rotates anticlockwise, the idle wheel 423 and the lower shaft wheel 424 are driven to rotate anticlockwise. The provision of the idle wheel 423 has another function of allowing the lower shaft wheel 424 to rotate clockwise by a small angle (at this time, the upper shaft wheel 421 and the middle shaft wheel 422 are not stationary in linkage) when the lower shaft wheel 424 has a counterclockwise rotation tendency at the latch valve gear 43, thereby achieving a secure engagement of the adjustment hub gear 42 and the latch valve gear 43.

The lower shaft wheel 424 of the sun gear 42 is engaged with the lock valve gear 43 of the spur gear, and the lower shaft wheel 424 rotates synchronously with the upper shaft wheel 421, whereby the reverse-rotating lower shaft wheel 424 rotates the lock valve gear 43 in the forward direction.

The lock valve gear 43 is meshed with the transfer gear 44 to drive the transfer gear 44 to reversely rotate, and the transfer gear 44 is meshed with the gear transmission set 45.

The gear set 45 is composed of four step gear stages, namely a first gear 451, a second gear 452, a third gear 453 and a fourth gear 454. The transfer gear 44 is meshed with the disk teeth of the first gear 451, the shaft teeth of the first gear 451 are meshed with the disk teeth of the second gear 452, the shaft teeth of the second gear 452 are meshed with the disk teeth of the third gear 453, the shaft teeth of the third gear 453 are meshed with the disk teeth of the fourth gear 454, the shaft teeth of the fourth gear 454 are meshed with the valve central control gear 46 and enable the valve central control gear 46 to rotate in the forward direction, meanwhile, the door shaft 1064 is driven to rotate, the spring 206 is tightened, the valve 106 is enabled to rotate to a set opening degree, namely, a flow outlet is opened, and when the opening degree of the valve 106 is up to 90 degrees, the flow outlet is completely opened.

The opening of the valve 106 is rotated forward and backward from 0 degrees to 90 degrees (clockwise rotation as viewed from the upper plate 201), and the opening of the valve 106 is rotated backward from 90 degrees to 0 degrees (counterclockwise rotation as viewed from the upper plate 201), and the same applies.

3) Valve locking mechanism

As shown in fig. 8, 9 and 10, it is composed of the above-mentioned hub gear 42, lock valve gear 43, rocker arm 5 mounted on lower plate 203, lock pin 6, latch plate 7 with circular arc wedge portion 71 and pin plate 72 at the end of the latch plate 7. The rocker arm 5 is a special-shaped metal sheet, and comprises a head part, a middle part and a tail part, wherein the head part is provided with a cylinder column 54 extending downwards, the middle part is provided with a column shaft 55 extending upwards, the tail part is provided with a rotary positioning hole 52, and a bay-like arm gulf opening 51 (see fig. 16) is formed between the head part and the tail part. The valve locking gear 43 is sleeved on the column shaft 55, a fixed arm column 53 with a shaft hole is arranged on the lower clamping plate 203, the rotary positioning hole 52 on the rocking wall 5 is sleeved on the fixed arm column 53 and can rotate relatively, and the switching gear 44 is inserted into the shaft hole of the fixed arm column 53 through a gear shaft on the switching gear. .

The lock pin 6 is vertically disposed near the lock valve gear 43, the lower end of the lock pin 6 may be clamped on the arm mouth 51 and the lock valve gear 43 is engaged with the lower shaft wheel 424 of the central gear 42 which can only rotate unidirectionally, the upper end of the lock pin 6 passes through the lock pin spring 61, a pin through hole (not labeled in the figure) provided on the pin plate 72 is connected with the lower end of the unlock hook 207, the unlock hook 207 is hung on one end of the unlock pressing handle 208, the unlock pressing handle 208 is sleeved on the other end of the wheel shaft 11 in the "1) wheel group mechanism" of the "pre-sale flow setting metering mechanism" at the "2" point in this item, and if the other end of the unlock pressing handle 208 is pressed downward by the unlock pressing rod 209, the lock pin 6 can be lifted up and the lower end thereof is separated from the arm mouth 51.

When the lower end of the lock pin 6 is caught on the arm-gulf port 51, the lock valve gear 43 is engaged with the lower shaft gear 424 of the sun gear 42, at this time, the sun gear 42, the lock valve gear 43, the transfer gear 44, the gear train group 45 and the valve center control gear 46 are all in the engaged state in sequence, and since the lower shaft gear 424 is a one-way wheel, even if the spring 206 is in the contracted state, the cascade engagement structure (i.e., the structure in which the aforementioned sun gear 42 to the valve center control gear 46 are sequentially engaged) prevents the spring 206 from releasing energy, i.e., the opened valve 106 is in the locked state.

4) Valve closing mechanism

As shown in fig. 4, 9 and 10, the unlocking lever 208, the rocker arm 5, the buckle column hook 81 arranged on the side of the rotary disk 8, the latch disk 7, the rotary disk 8, the spring 206 and the valve 106. The latch plate column hook 81 is arranged on the rotary plate 8, the shape of the latch plate column hook is in an inverted L shape, the vertical part of the L shape is fixedly connected to the side of the rotary plate 8, the transverse part (hereinafter referred to as a hook part 82) of the L shape is suspended in the air and extends towards the latch plate 7, the hook part 82 of the latch plate column hook 81 rotates along with the rotary plate 8 and can slide along the upper edge of the arc wedge part 71 of the latch plate 7, and when the rotary plate 8 rotates until the opening degree of the valve 106 is 0 degree, the hook part 82 is buckled and hung on the thick end of the arc wedge part 71 of the latch plate 7 and presses the latch plate 7 downwards; when the rotary disk 8 is rotated to 90 degrees of the opening of the valve 106, the hook 82 is rotated to the thin end of the circular arc wedge 71 of the latch disk 7.

A rocker arm pushing block 83 is arranged on the rotary table 8 at a position far away from the buckling column hook 81, when the rotary table 8 rotates to the opening degree of the valve 106 to be 0 degree, the rocker arm pushing block 83 is tightly pressed on the cylindrical column 54 arranged on the rocker arm 5, the valve locking gear 43 on the rocker arm 5 is forced to be inwards closed and meshed with the lower shaft wheel 424 of the central gear 42, and at the moment, the lower end of the lock pin 6 is clamped on the arm gulf opening 51 on the rocker arm 5; when the dial 8 is rotated to 90 degrees where the valve 106 is open, the rocker arm push block 83 is forced to rotate away from the spool 54 to release the compression on the spool 54.

Namely: when the opening of the valve 106 is 90, the rocker arm pushing block 83 releases the compression to the cylinder 54, and when the lower end of the lock pin 6 is engaged with the arm-gulf opening 51 of the rocker arm 5, the lock valve gear 43 is engaged with the lower shaft wheel 424 of the sun gear 42, and the valve 106 is in the locked state, that is, the spring 206 is in the contracted state. When the unlocking lever 208 is pressed (this action is only used when the remaining water amount is present, such as when a trip is going out, the water valve needs to be closed), the unlocking hook 207 is caused to pull the lock pin 6 upwards to disengage the arm-gulf opening 51, at this time, the rocker arm 5 is in an unconstrained state, the valve locking gear 43 thereon is meshed with the transfer gear 44, the transfer gear 44 generates a clockwise rotation tendency under the action of the energy to be released by the tensed spring 206 through the gear transmission assembly 45 and the valve centering gear 46, the rotation tendency causes the valve locking gear 43 meshed with the rotation to have a pulling force outwards (i.e., a radially outwards tendency along the lower clamping plate), the valve locking gear 43 is assembled on the rocker arm 5, the rocker arm 5 rotates clockwise with the arm fixing post 53 as an axis, the valve locking gear 43 is disengaged from the lower shaft wheel 424 of the central gear 42, and at the same time, the "cascade engagement state" described in the foregoing "3) valve locking mechanism" is in an unconstrained state, the rotary table 8 is driven to rotate counterclockwise by the energy released from the spring 206, the hook 82 is hooked on the thick end of the circular arc wedge 71 of the latch plate 7 and presses down the latch plate 7, the rocker arm pushing block 83 brings the rocker arm 5 inwardly, the valve locking gear 43 is engaged with the lower shaft wheel 424 of the central gear 42, and the rear pushing block 85 pushes the base 91 forward (clockwise from top to bottom, counterclockwise to front) so that the meter 101 is decoupled from the pre-selling flow rate setting table 102, and as a result, the valve 106 is rotated from 90 degrees to 0 degrees and the flow outlet is closed.

5) Valve self-locking mechanism

Is composed of the rotary disk 8, a rocker arm pushing block 83, a buckle disk column hook 81 and a cylinder column 54.

After the spring 206 releases the energy and fully closes the valve 106, the latch post hook 81 is located at the thick end of the arc wedge 71 of the latch plate 7 along with the rotation of the rotary disk 8, the hook 82 on the latch post hook presses down the latch plate 7, so that the latch plate 7 moves down, the pin plate 72 (the "3" valve locking mechanism "mentioned above) disposed thereon is driven by the latch plate 7 to move down, the latch pin 6 is pressed down by the latch spring 61 sleeved between the upper end of the latch pin 6 and the pin plate 72, and the latch pin 6 moves down, at the same time, the rotary disk 8 presses the rocker arm pushing block 83 against the cylinder post 54, so that the rocker arm 5 is drawn inwards and the arm mouth 51 on the rocker arm is placed just under the latch pin 6, at this time, the lower end of the pressed down latch pin 6 is well dropped and clamped on the arm mouth 51 of the rocker arm 5, and the latch valve gear 43 is engaged with the lower wheel of the pivot gear 42 to be automatically locked.

6) Pre-sales quantity return-to-zero self-locking mechanism

The device consists of a plug pin disc 7, a plug pin 6, a preset flowmeter digital wheel set 1 (the preset flowmeter digital wheel set 1 described by a word wheel set mechanism of ' 2 and a preset flow setting and measuring mechanism ' 1 ' in the previous item) and a rotary disc 8.

Three columnar vertical pins 75 (see fig. 17) are arranged on the pin plate 7 at intervals in parallel, a top coil spring 77 is arranged between the bottom of the pin plate 7 and the lower clamping plate 203, a pull coil spring 78 is also arranged between the thick end of the top coil spring and the lower clamping plate 203, the lower ends of the vertical pins 75 are fixedly connected to the pin plate 7, the upper ends of the vertical pins 75 extend upwards and penetrate through corresponding pin holes 76 arranged on the middle clamping plate 202, and the pin holes 76 are positioned right below the pre-selling flowmeter digital wheel set 1.

A groove 13 (see fig. 15) is arranged beside each character wheel 12 in the pre-selling flowmeter digital wheel set 1, the notch of the groove 13 faces downwards when the number on the corresponding character wheel 12 returns to zero, and when the three numbers in the character wheel set return to zero, the pin disc 7 can lift three vertical pins 75 under the action of the elastic force of the top coil spring 77 and enable the upper end of each vertical pin 75 to be inserted into the corresponding groove 13.

When the rotary table 8 rotates until the opening of the valve 106 is 90 degrees (the spring 206 is tightened, that is, the flow discharge port is fully opened), and the valve 106 is in the locked state (that is, the lock pin 6 is clamped at the arm-leg opening 51 of the rocker arm 5 to engage the lock valve gear 43 with the hub gear 42), the hook portion 82 of the hook portion 81 of the hook portion is located at the thin end side of the circular arc wedge portion 71 of the latch plate 7, and there are two cases in which the hook portion 82 of the hook portion 81 and the thin end have a distance margin in the vertical direction that can move the latch plate 7 up:

a. When one of the ten, ten and hundred three digits in the character wheel set is not zero, the notch of the groove 13 beside the non-zero character wheel 12 is in a dislocation state with the upper end of the corresponding vertical pin 75, and the upper end of the vertical pin 75 is abutted against the non-groove 13 beside the corresponding character wheel 12, so that the vertical pin 75 constrains the whole bolt disc 7 to be in a state to be released (called a middle-order position for short) in the vertical direction, and at the moment, the valve 106 is still in a locking state.

b. When the numbers of the three digits in the character wheel set are all zero, the notch of the groove 13 beside the character wheel 12 with the three digits is in a right-facing state with the upper ends of the corresponding vertical pins 75, under the elastic force of the top coil spring 77, the upper ends of the three vertical pins 75 are automatically inserted into the corresponding grooves 13, the whole pin plate 7 is in a release state (short for high-order position) in the vertical direction by the upward vertical pins 75, the upward pin plate 7 synchronously carries the pin plate 72 to move upward, the upward movement of the pin plate 72 lifts the lock pin 6, the lower ends of the lifted lock pins 6 are separated from the arm openings 51, so that the restraint of the lock pins 6 on the rocker arms 5 is released, the lock valve gear 43 is separated from the engagement with the lower shaft wheel 424 of the central gear 42 under the release action of the spring 206, the spring 206 is released, the valve 106 is reversely rotated until the opening degree is zero, and the flow discharge outlet is closed. At the same time, the hook portion 82 of the latch post hook 81 on the rotary table 8 continuously pushes down the latch plate 7 to a pressed state (short for low-order position) during the reverse rotation of the rotary table 8, the vertical pin 75 on the latch plate 7 also breaks away from the groove 13 along with the downward movement of the latch plate 7, the rocker arm pushing block 83 on the rotary table 8 also presses against the barrel post 54 along with the rotation of the rotary table 8, and the lower end of the latch pin 6 moves downward to be blocked on the arm gulf opening 51 of the rocker arm 5 again, so that the valve 106 is in a locked state. The end of this phase means the end of a complete process from the setting, use of the pre-sales flow to the end of the pre-sales flow consumption, and thus the next cycle is entered.

4. Further improvements

The invention is provided with a front push block 84 and a rear push block 85 on the rotary table 8, the front push block 84 and the rear push block 85 are arranged at intervals and are positioned at the front side (clockwise direction of the rotary table 8 is the front direction when seen from top to bottom) of the buckle column hook 81, a notch is arranged on the lower clamping plate 203 at the position adjacent to the bolt tray 7, a base 91 which is positioned on the rotary table 8 and can be shifted in the notch is arranged in the notch, a pull seat spring 95 is arranged between a spring column of the base 91 and a spring column of the lower clamping plate 203, and the intermediate wheel 9 in the first water-gas prepayment meter 100 is arranged on the base 91.

When the valve 106 is at an opening degree of 0 degrees, the rear push block 85 rotates counterclockwise with the rotary disk 8 to the thick end of the circular arc wedge-shaped portion 71 of the plug pin disk 7 and generates a forward pushing force to the base 91, forcing the base 91 to displace forward, thereby disengaging the intermediate wheel 9 on the base 91 from the lower gear 33 of the worm wheel 3 described in the foregoing "2, pre-sales flow rate setting metering mechanism", and thereby decoupling the meter 101 from the pre-sales flow rate setting table 102. In this case, the word wheel in the actual flowmeter digital wheel set in meter 101 is not reversed when the pre-sales flow rate is set according to the method described above.

When the valve 106 is at the opening degree of 90 degrees, the rear push block 85 rotates clockwise with the rotary disk 8 to the thin end of the circular arc wedge-shaped portion 71 of the plug pin disk 7, and then the front push block 84 rotates to touch the base 91 and generate a backward thrust force to the base 91, so that the intermediate wheel 9 carried on the base 91 is meshed with the lower gear 33 of the worm wheel 3, thereby completing the connection of the meter 101 and the pre-selling flow rate setting table 102. In this case, when the character wheel in the actual flowmeter digital wheel set in the meter 101 rotates forward with the flow consumption, the character wheel 12 in the pre-sold flowmeter digital wheel set 1 in the pre-sold flow setting table 102 is reversed at the same speed by the cascade engagement of the consumption gear assembly in the meter 101, the intermediate wheel 9 and the worm wheel 3.

In the present invention, the plastic materials are used for the components (such as the clamping plates, the turntable 8, the rotating handle, the character wheel set and the plurality of gears) except for the part of the shaft, the spring 206, the screw and the part of the gears.

3. The operation method of various working states of the invention

1. Recharging method

When the payment meter 100 needs to be charged with the pre-sales flow rate (i.e., a specific increment number is set by forward rotation of the pre-sales flow meter digital wheel set 1 in the pre-sales flow rate setting meter 102), the intermediate wheel 9 is unlocked by the lifting lock pin 6, and is disengaged from the worm wheel 3, and the charging setting of the pre-sales flow rate can be completed by the preset flow rate control unit 105 by the setting method described by the "2" in the "two-pre-sales flow rate setting meter 102" and the "2" in the pre-sales flow rate setting metering mechanism ".

2. Normal use after recharging

The valve 106 is opened (i.e. the spring 206 is tightened according to the structure and method described in the "3 of the" two, pre-selling flow rate setting table 102 "and the" 2) valve opening setting mechanism of the flow rate outlet valve control mechanism ") so that the intermediate wheel 9 is engaged with the worm wheel 3, and the payment meter 100 achieves the described effect according to the method described in the" 2 of the "two, pre-selling flow rate setting table 102" and the "2) pre-selling flow rate setting mechanism 2, 3) worm wheel 3 and 4) the characteristics of the pre-selling flow rate setting metering mechanism", thereby achieving the accurate metering and control of the actual consumption of the pre-selling flow rate.

3. Valve for closing when pre-selling flow returns to zero

The structure and the method described in the '3 of the' second and the 'pre-selling flow setting table 102' and the '6 of the flow outlet valve control mechanism' of the 'pre-selling quantity return-to-zero self-locking mechanism' are adopted for completion.

4. Suspending use of the pay table 100 to close the valve

The release of the spring 206, as described in the above-described configuration and method of "3" for the second, pre-sale flow rate setting gauge 102 "and" 4) for the flow rate outlet valve control mechanism ", allows the valve 106 to close the flow rate outlet of the payment gauge 100 while leaving the pre-sale flow rate value unchanged.

Claims

1. The utility model provides a water gas flow control system is sold in advance, includes bed frame subassembly, the flow of selling in advance sets for metering mechanism and flow outlet valve control mechanism, its characterized in that:

the pre-selling flow setting metering mechanism comprises a base frame assembly, a pre-selling flow setting mechanism (2), a character wheel set mechanism for displaying pre-selling flow and a meter (101) for accumulating actual consumption of the pre-selling flow, wherein the character wheel set mechanism consists of a pre-selling flow meter digital wheel set (1) and a cone (15) for driving a unit character wheel (12) in the pre-selling flow meter digital wheel set (1) to rotate through a wheel shaft (11);

a cylindrical worm wheel (3) is arranged between the cone (15) and the preset flow setting mechanism (2), the worm wheel (3) is composed of a worm wheel part (31), an upper gear (32) and a lower gear (33) which are arranged at the upper end and the lower end of the worm wheel part (31) and have the same structure and size, the worm wheel part (31) is meshed with the cone (15), the upper gear (32) is meshed with a preset quantity gear component in the preset flow setting mechanism (2), and the lower gear (33) is meshed with a consumption gear component in the meter (101);

the ratio of the angular speed of the upper gear (32) to the angular speed of the unit character wheel (12) in the pre-sold flowmeter digital wheel set (1) is equal to the ratio of the angular speed of the lower gear (33) to the angular speed of the unit character wheel in the actual flowmeter digital wheel set in the meter (101);

The rotation direction of an upper gear (32) corresponding to the digit reverse rotation of a unit character wheel (12) in the pre-selling flowmeter digital wheel set (1) is the same as the rotation direction of a lower gear (33) corresponding to the digit forward rotation of the unit character wheel in the actual flowmeter digital wheel set;

the flow outlet valve control mechanism consists of a valve (106) capable of opening or closing a flow outlet in the pre-selling water gas flow control system, a valve opening setting mechanism, a valve locking mechanism, a valve closing mechanism and a valve self-locking mechanism, wherein,

the base frame assembly comprises an upper clamping plate (201), a middle clamping plate (202), a lower clamping plate (203), a rotary table (8) and a sealing bottom plate (204) from top to bottom, wherein the rotary table (8) is clamped between the lower clamping plate (203) and the sealing bottom plate (204) and can rotate for a set angle;

the valve (106) is arranged below the seal bottom plate (204) and consists of a rubber valve (1063), a valve base plate (1061) and a valve handle (1062), the rubber valve (1063) is elastically arranged on the valve base plate (1061) in a vertically movable mode, the valve base plate (1061) is fixedly connected with the valve handle (1062), the valve handle (1062) is fixedly sleeved on a door shaft (1064), the door shaft (1064) penetrates through a spring (206), a rotary table (8) and a lower clamping plate (203) to be connected with a valve center control gear (46) in a valve opening setting mechanism, the seal bottom plate (204), the rotary table (8), the lower clamping plate (203) and the valve center control gear (46) are sleeved on the door shaft (1064), and the spring (206) capable of enabling the valve (106) to be opened and closed is arranged between the seal bottom plate (204) and the rotary table (8);

The valve opening setting mechanism consists of a central gear (42), a locking valve gear (43), a transfer gear (44), a gear transmission group (45) and a valve central control gear (46) which are respectively arranged on a middle clamping plate (202), a central gear (42) between an upper clamping plate (201) and a lower clamping plate (203), a locking valve gear (43) between the lower clamping plate (203) and the middle clamping plate (202), wherein the transition gear (41) is respectively meshed with a top wheel (213) which is in unidirectional rotation in a main driving gear set (21) of a pre-selling flow setting mechanism (2) of the precise metering system of the pre-selling water gas flow and is in unidirectional rotation with an upper shaft wheel (421) of the central gear (42), a lower shaft wheel (424) which is in unidirectional rotation of the central gear (42) is meshed with the locking valve gear (43), the locking valve gear (43) is meshed with the transfer gear (44) and is meshed with the gear transmission group (45) through the transfer gear (44), and the gear transmission group (45) is meshed with the valve central control gear (46); the top wheel (213) is reversely rotated with the bottom wheel (212) which is in the main driving gear set (21) and is in unidirectional rotation, namely, the spring (206) can be tightened through the transition gear (41), the central gear (42), the valve locking gear (43), the switching gear (44), the gear transmission set (45) and the valve central control gear (46) and the valve (106) can be rotated to a set opening degree;

The valve locking mechanism consists of a central gear (42), a locking valve gear (43), a rocker arm (5) arranged on a lower clamping plate (203), a lock pin (6), a lock pin disc (7) and a pin plate (72) arranged at the end part of the lock pin disc (7), wherein the locking valve gear (43) is arranged on the rocker arm (5), the lower end of the lock pin (6) can be clamped on an arm ball mouth (51) on the rocker arm (5) and enables the locking valve gear (43) to be meshed with an axle lower wheel (424) of the central gear (42) which can only rotate in one direction, the upper end of the lock pin (6) passes through the locking pin spring (61), a pin through hole arranged on the pin plate (72) is connected with the lower end of an unlocking hook (207), and the locking valve gear (43) prevents the spring (206) from releasing energy through a switching gear (44), a gear transmission group (45) and a valve center control gear (46) when being meshed with the axle lower wheel (424) of the central gear (42);

the valve closing mechanism comprises an unlocking pressing handle (208), a buckling disc column hook (81) arranged on the rotary disc (8), a bolt disc (7) of the arc wedge-shaped part (71), the rotary disc (8), a spring (206) and a valve (106), wherein one end of the unlocking pressing handle (208) is connected with the upper end of the unlocking hook (207) and can lift the unlocking hook (207) to enable the lower end of the lock pin (6) to be separated from the arm mouth (51); when the lock pin (6) is pulled up by the unlocking hook (207) and separated from the arm-gulf opening (51) and a rocker arm pushing block (83) on a rotary table (8) releases the pressure on a barrel column (54) which is arranged at the front part of the rocker arm (5) and extends downwards, the valve locking gear (43) is disengaged from an axial lower wheel (424) of the central gear (42) to be unlocked, and a spring (206) releases energy to enable a valve (106) to be closed;

The valve self-locking mechanism is composed of a rotary table (8), a rocker arm push block (83) arranged on the rotary table (8), a buckling disc column hook (81) and a barrel column (54), wherein a hook part (82) of the buckling disc column hook (81) slides along the wedge-shaped upper edge of the bolt disc (7) along with the rotation of the rotary table (8), after the spring (206) releases energy and enables a valve (106) to be completely closed, the hook part (82) of the buckling disc column hook (81) presses down the bolt disc (7) and when the rocker arm push block (83) is tightly pressed onto the barrel column (54), the lock pin (6) is under the action of the lock pin spring (61), the lower end of the lock pin (6) is clamped on the arm-shaped mouth (51), the lock valve gear (43) is meshed with a lower shaft wheel (424) of the central gear (42) to be automatically locked, and the spring (206) releases energy to enable the valve (106) to be closed.

2. The pre-sell water vapor flow control system of claim 1 wherein: the opening degree is 0-90 degrees.

3. The pre-sell water vapor flow control system of claim 1 wherein: the central gear (42) is a gear which rotates anticlockwise in one direction, and the gear is an upper shaft wheel (421), a middle shaft wheel (422), an idler wheel (423) and a lower shaft wheel (424) from top to bottom, the upper shaft wheel (421) and the middle shaft wheel (422) are of an integrated structure, and the upper shaft wheel (421) rotates anticlockwise to drive the idler wheel (423) and the lower shaft wheel (424) to rotate in the same direction.

4. The pre-sell water vapor flow control system of claim 1 wherein: the plug pin disc (7) is provided with a plurality of columnar vertical pins (75) in parallel, the upper ends of the vertical pins (75) are arranged in corresponding pin holes (76) on the middle clamping plate (202), when the preset flowmeter digital wheel set (1) in the preset water gas flow accurate metering system returns to zero, the side of each character wheel (12) in the counter character wheel (12) set is opposite to the position of the pin holes (76), and a groove (13) capable of enabling the upper end of the vertical pins (75) to be inserted is formed.

5. The pre-sell water vapor flow control system of claim 1 wherein: a front push block (84) and a rear push block (85) are arranged on the rotary table (8) at the front side of the buckle column hook (81), a notch is formed in the lower clamping plate (203) at a position close to the bolt disc (7), a base (91) which is arranged on the rotary table (8) and can be shifted in the notch is arranged in the notch, a scale wheel (9) in the precise metering system for the pre-selling water gas flow is arranged on the base (91), and after the rear push block (85) rotates clockwise along with the rotary table (8) and is far away from the base (91), the base (91) shifts backwards under the compression of the front push block (84) and enables the scale wheel (9) to be meshed with a lower gear (33) of a worm wheel (3) in the precise metering system for the pre-selling water gas flow; when the front push block (84) rotates anticlockwise along with the turntable (8) and is far away from the base (91), the base (91) is forwards shifted under the compression of the rear push block (85), and the intermediate wheel (9) is disengaged from the lower gear (33) of the worm wheel (3) in the accurate metering system for the pre-sold water gas flow.

6. The utility model provides a water and gas prepayment table, includes watchcase (103), installs the entering chamber and the outflow chamber of record flow actual consumption's strapping table (101) and pre-selling flow settlement table (102) respectively, and the entering chamber meets with the flow entry of this water and gas prepayment table (100) through impeller group or gas word wheelset, and entering chamber communicates with each other with the outflow chamber, its characterized in that: the pre-selling flow setting table (102) is a pre-selling water gas flow control system according to any one of claims 1-5, the pre-selling water gas flow control system is connected with the meter (101) through a idle wheel (9) arranged in the pre-selling water gas flow control system, the idle wheel (9) is composed of a sleeve shaft (92), a driven gear (93) and a driving gear (94), the driven gear (94) is arranged at the upper end and the lower end of the sleeve shaft (92) and has the same structural size, the driving gear (94) is meshed with a consumption gear assembly in the meter (101), and the driven gear (93) is meshed with a lower gear (33) of a worm wheel (3) in the pre-selling water gas flow control system when a valve (106) in the pre-selling water gas flow control system is in an open state.