CN112539787A

CN112539787A - Flow meter

Info

Publication number: CN112539787A
Application number: CN202011341224.0A
Authority: CN
Inventors: 邓超波; 周浙潭; 罗园梁; 胡波
Original assignee: Zhejiang Weidun Machinery Technology Co ltd
Current assignee: Zhejiang Weidun Machinery Technology Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-03-23
Anticipated expiration: 2040-11-25
Also published as: CN112539787B

Abstract

The application relates to a flowmeter, which comprises a valve body, a pump-out module and a flow calculation module, wherein the pump-out module and the flow calculation module are arranged on the valve body, a liquid inlet and a liquid outlet are formed in the valve body, the pump-out module comprises a driving oil duct, a liquid outlet oil duct, a pumping channel, a distribution piston and a control piece arranged on the distribution piston, the driving oil duct is connected with the end part of the pumping channel and the liquid inlet, the liquid outlet oil duct is connected with the driving oil duct and the liquid outlet, the distribution piston is connected in the pumping channel in a sliding manner, the control piece is used for disconnecting the liquid outlet oil duct on the driving oil duct when the driving oil duct at one end of the pumping channel is communicated with the liquid inlet, disconnecting the driving oil duct at the other end of the pumping channel from the liquid inlet and connecting the driving oil duct with the, and calculating the flow. The influence of impurities on the measurement result of the flowmeter is better reduced.

Description

Flow meter

Technical Field

The application relates to the technical field of liquid flow detection, in particular to a flowmeter.

Background

The grease flowmeter in the current market is mainly a gear type flowmeter, a cylindrical gear or an elliptic gear is pushed to rotate through liquid circulation, the grease in a cavity is extruded out through the rotation of the cylindrical gear or the elliptic gear, a sensor is used for receiving magnetic induction pulses on the gear, the discharge capacity of each time is calculated according to the size of the cavity, and then the total flow is calculated according to the number of pulse signals.

With respect to the related art in the above, the inventors consider that: the liquid is pushed out through the meshing of the gears, and if impurities are contained in the liquid, the gears can be jammed, the number of pulses is inaccurate, and therefore the flow measurement result is influenced.

Disclosure of Invention

In order to better reduce the influence of impurities on the measurement result of the flowmeter, the application provides the flowmeter.

The application provides a flowmeter adopts following technical scheme:

a flowmeter comprises a valve body, a pump-out module and a flow calculation module, wherein the pump-out module and the flow calculation module are arranged on the valve body, the valve body is provided with a liquid inlet and a liquid outlet, the pump-out module comprises a driving oil duct, a liquid outlet oil duct, a pumping channel, a distribution piston and a control piece arranged on the distribution piston, the driving oil duct is connected with the end part of the pumping channel and the liquid inlet, the liquid outlet oil duct is connected with the driving oil duct and the liquid outlet, the distribution piston is connected in the pumping channel in a sliding manner, the control piece is used for disconnecting the liquid outlet oil duct on the driving oil duct when the driving oil duct at one end of the pumping channel is communicated with the liquid inlet, disconnecting the driving oil duct at the other end of the pumping channel from the liquid inlet and connecting the driving oil duct with the liquid outlet oil duct, and calculating the flow.

By adopting the technical scheme, when in use, the oil is sucked into the corresponding oil passage by the movement of the distribution piston, the oil is pumped out by the return motion of the distribution piston, the flow calculation module detects the times of the reciprocating motion of the distribution piston, and the total volume of the pumped oil is calculated by multiplying the unit volume of the pumped oil which can be pumped out by the reciprocating motion of the distribution piston every time by the motion times, wherein the total volume is the measured flow; due to this. The fit clearance of piston is at 3-4 microns, and the impurity volume in the lubricating oil is generally greater than this fit clearance for impurity can not get into the flowmeter inside, thereby does not cause the influence to the measuring of flow, makes the volume of the oil that this flowmeter surveyed more accurate.

Optionally, the pumping channel includes a first pumping channel and a second pumping channel, the distribution piston includes a first distribution piston and a second distribution piston, the first distribution piston slides in the first pumping channel, the second distribution piston slides in the second pumping channel, the control element includes a first control element and a second control element, the liquid outlet duct includes a first liquid outlet duct and a second liquid outlet duct, and the first pumping channel is sequentially provided with a first channel first connection port, a first channel second connection port, a first channel third connection port, and a first channel fourth connection port; the second pumping channel is sequentially provided with a second channel first connecting port, a second channel second connecting port, a second channel third connecting port and a second channel fourth connecting port; the first channel first connecting port is communicated with the second channel third connecting port to form a first piston first driving oil channel, the first channel second connecting port is communicated with the second channel first connecting port to form a second piston first driving oil channel, the first channel third connecting port is communicated with the second channel fourth connecting port to form a second piston second driving oil channel, and the first channel fourth connecting port is communicated with the second channel second connecting port to form a first piston second driving oil channel; the first distribution piston comprises a first cylinder, the first control part comprises a first piston first blocking block, a first piston second blocking block, a first piston third blocking block and a first piston fourth blocking block which are arranged on the first cylinder in sequence and used for blocking the first pumping channel, and a first piston first ring groove, a first piston second ring groove and a first piston third ring groove are formed between every two adjacent blocking blocks in sequence; the second distribution piston comprises a second cylinder body, the second control piece comprises a second piston first blocking block, a second piston second blocking block, a second piston third blocking block and a second piston fourth blocking block which are arranged on the second cylinder body in sequence and used for blocking the second pumping channel, and a second piston first ring groove, a second piston second ring groove and a second piston third ring groove are formed between every two adjacent blocking blocks in sequence; the liquid inlet is positioned between the first channel second connecting port and the first channel third connecting port, a first channel first flow outlet is arranged between the first channel first connecting port and the first channel second connecting port, the first channel first flow outlet is positioned between the first piston first blocking block and the first piston second blocking block, a first channel second flow outlet is arranged between the first channel third connecting port and the first channel fourth connecting port, and the first channel second flow outlet is positioned between the first piston third blocking block and the first piston fourth blocking block; a second channel first flow outlet is arranged between the second channel first connecting port and the second channel second connecting port, the second channel first flow outlet is positioned between the second piston first block and the second piston second block, a second channel second flow outlet is arranged between the second channel third connecting port and the second channel fourth connecting port, and the second channel second flow outlet is positioned between the second piston third block and the second piston fourth block; when one end of the first distribution piston, which is close to the first piston first block, is abutted against the end part of the first pumping channel, the first channel second connecting port is positioned between the first piston second block and the first piston third block, and the first channel third connecting port is positioned between the first piston third block and the first piston fourth block; when the other end of the first distribution piston is abutted against the end part of the first pumping channel, the second connecting port of the first channel is positioned between the first piston first block and the first piston second block, and the third connecting port of the first channel is positioned between the first piston second block and the first piston third block; when one end, close to the first block of the second piston, of the second distribution piston is abutted against the end part of the second pumping channel, the second connecting port of the second channel is located between the second block of the second piston and the third block of the second piston, and the third connecting port of the second channel is located between the third block of the second piston and the fourth block of the second piston; when the other end of the second distribution piston collides with the end of the second pumping channel, the second channel second connecting port is located between the second piston first block and the second piston second block, and the second channel third connecting port is located between the second piston second block and the second piston third block.

By adopting the technical scheme, the layout of each pipeline is more reasonable under the condition of ensuring the working condition of alternate pumping.

Optionally, the flow calculation module includes an inductor and a processor, the inductor is disposed on the valve body and used for inducing impact between the first control piston or the second control piston and the end wall of the pumping channel, and sending an electrical signal to the processor, and the processor is electrically connected with the inductor and used for receiving the electrical signal of the inductor, thereby counting the number of impact times, and calculating the flow through the number of impact times.

By adopting the technical scheme, the distribution piston collides with the sensor in the oil pumping process, when the distribution piston collides with the sensor, the sensor sends out electric signal pulses to the processor, the processor calculates the pulse times, and the total flow is calculated by combining the pulse times and the unit pumping volume of the distribution piston every time.

Optionally, the valve body is provided with a limit stop for limiting the moving stroke of the first distribution piston and the second distribution piston.

By adopting the technical scheme, the limiting pieces are utilized to limit the movement strokes of the first distribution piston and the second distribution piston in the reciprocating motion, so that the pumping stroke of the distribution pistons is limited, the structure is more stable, and the blockage is not easy to occur.

Optionally, the limiting member includes a roller, a limiting groove for the roller to slide along a direction from the first distribution piston to the second distribution piston is formed in the valve body, and two ends of the limiting groove are communicated with the first piston second ring groove and the second piston second ring groove; the bottom of the first piston second annular groove is provided with a first piston first clamping groove and a first piston second clamping groove which are distributed along the length direction of the first distribution piston, the bottom of the second piston second annular groove is provided with a second piston first clamping groove and a second piston second clamping groove which are distributed along the length direction of the second distribution piston, the bottoms of the first piston first clamping groove, the first piston second clamping groove, the second piston first clamping groove and the second piston second clamping groove are all arc-shaped groove bottoms, and the side surface of the roller is attached to the arc-shaped groove bottom of one clamping groove on one distribution piston; when one of the distribution pistons moves, the arc-shaped groove bottom on the distribution piston drives the roller to be far away from the distribution piston along the limiting groove, and the roller is clamped into one of the clamping grooves of the other distribution piston, and when the roller is clamped into the clamping groove, the part of the roller far away from the clamped clamping groove is positioned between the second blocking block and the third blocking block of the moving distribution piston and used for abutting against the second blocking block or the third blocking block so as to limit the moving stroke of the moving distribution piston.

By adopting the technical scheme, only one of the first distribution piston and the second distribution piston can move through the matching of the roller and the limiting groove, the movement sequence and the movement stroke of the first distribution piston and the second distribution piston are limited, and the sequential operation of alternate pumping is ensured.

Optionally, a forming channel which is coaxial with the oil duct and penetrates through the side wall of the valve body at the side where the oil duct is located is formed in the valve body, and a blocking piece for blocking the forming channel is arranged in the forming channel.

By adopting the technical scheme, the forming channel is used for conveniently processing the oil duct in the valve body, and the forming channel is plugged by plugging after the processing is finished, so that the oil is prevented from leaking from the forming channel.

Optionally, the blocking piece comprises a steel ball arranged in the forming channel.

By adopting the technical scheme, the forming channel is plugged by the steel ball, the structure is simple, the plugging process is convenient, and the plugging effect is good.

Optionally, one end of the valve body is provided with a first valve body, and the flow calculation module is arranged in the first valve body.

Through adopting above-mentioned technical scheme, flow calculation module and first valve body are installed earlier, then carry out fixed mounting between first valve body of rethread and the valve body, and it is more convenient to install and use.

Optionally, the first pumping channel and the second pumping channel penetrate through the valve body along the length direction, a third valve body is arranged on the valve body, and the third valve body and the first valve body are respectively located at two ends of the valve body along the moving direction of the distribution piston and are used for blocking two ends of the first pumping channel and the second pumping channel.

Through adopting above-mentioned technical scheme, the one end of first pumping passageway, second pumping passageway is plugged up to the third valve body, avoids liquid outflow and simple structure, simple to operate.

Optionally, a second valve body is arranged on the valve body, and an aviation plug is arranged on the second valve body.

By adopting the technical scheme, the aviation plug is inserted into the socket and used for supplying power to the flow calculation module.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the distribution piston type oil pump is used, oil is sucked into the corresponding oil passage through the movement of the distribution piston, the oil is pumped out through the return movement of the distribution piston, the frequency of the reciprocating movement of the distribution piston is detected by the flow calculation module, the total volume of the pumped oil is calculated according to the unit volume of the oil which can be pumped out by the reciprocating movement of the distribution piston every time and the number of the movement times, and the total volume is the measured flow; due to this. The fit clearance of the piston is 3-4 microns, and the volume of impurities in the lubricating oil is generally larger than that of the fit clearance, so that the impurities cannot enter the interior of the flowmeter, the flow detection is not influenced, and the volume of the oil measured by the flowmeter is more accurate;

2. the forming channel is used for conveniently processing the oil duct in the valve body, and the forming channel is plugged through plugging after the processing is finished, so that oil is prevented from leaking from the forming channel;

3. the flow calculation module is located in the first valve body, and is convenient to install and maintain, and the aviation plug is installed on the second valve body, and the power supply and the use of the flowmeter are facilitated.

Drawings

Fig. 1 is a schematic structural diagram of a flow meter according to an embodiment of the present application.

Fig. 2 is a cross-sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is a cross-sectional view of a valve body of a flow meter according to an embodiment of the present invention, taken in the direction opposite to a-a in fig. 1.

Fig. 5 is a schematic structural view of a dispense piston of a flow meter according to an embodiment of the present application.

FIG. 6 is a schematic illustration of the valve body piping connections for a flow meter according to an embodiment of the present application with the first dispensing piston located closest to the third valve body position and the second dispensing piston located closest to the third valve body position.

FIG. 7 is a schematic illustration of the valve body piping connections for a flow meter according to an embodiment of the present application with the first dispensing piston located closest to the third valve body position and the second dispensing piston located closest to the third valve body position.

FIG. 8 is a schematic illustration of a valve body piping connection for a flow meter according to an embodiment of the present application with the first dispensing piston located closest to the second valve body position and the second dispensing piston located closest to the third valve body position.

FIG. 9 is a schematic view of a valve body piping connection for a flow meter according to an embodiment of the present application, with the first dispensing piston located closest to the second valve body position and the second dispensing piston located closest to the second valve body position.

Description of reference numerals: 1. a valve body; 11. a liquid inlet; 12. a liquid outlet; 13. a first valve body; 14. a second valve body; 141. an aviation plug; 15. a third valve body; 16. forming a channel; 17. a blocking member; 2. a pump-out module; 3. a drive oil passage; 31. a first drive oil passage; 32. a second drive oil passage; 33. a third drive oil gallery; 34. a fourth drive oil gallery; 41. a first liquid outlet duct; 42. a second liquid outlet channel; 5. a pumping channel; 51. a first pumping channel; 511. a first channel first connection port; 512. a first channel second connection port; 513. a first channel third connection port; 514. a first channel fourth connection port; 515. a first channel first outflow port; 516. a first channel second flow outlet; 52. a second pumping channel; 521. a second channel first connection port; 522. a second channel second connection port; 523. a second channel third connection port; 524. a second channel fourth connecting port; 525. a second channel first outflow port; 526. a second channel second outlet; 61. a first dispensing piston; 62. a second dispensing piston; 711. a first piston first plug; 712. a first piston second plug; 713. a first piston third plug; 714. a first piston fourth plug; 715. a first piston first ring groove; 716. a first piston second ring groove; 717. a first piston third ring groove; 721. a second piston first plug; 722. a second piston second block; 723. a second piston third plug; 724. a second piston fourth plug; 725. a second piston first ring groove; 726. a second piston second ring groove; 727. a second piston third ring groove; 8. a limiting member; 81. a limiting groove; 82. a first piston first slot; 83. a first piston second clamping groove; 84. a second piston first slot; 85. a second piston second clamping groove; 86. a limiting clip; 9. and (5) sealing rings.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a flowmeter, refer to fig. 1, including valve body 1, pump out module 2 and flow calculation module, pump out module 2 sets up in valve body 1, pump out module 2 is including offering drive oil duct 3 in valve body 1, go out the liquid oil duct, pumping channel 5, the distribution piston and set up the control on the distribution piston, inlet 11 and liquid outlet 12 have been seted up on the pump body, drive oil duct 3 connects the tip and the inlet 11 of pumping channel 5, it connects drive oil duct 3 and liquid outlet 12 to go out the liquid oil duct, the distribution piston slides and connects in pumping channel 5.

As shown in fig. 2 and 3, the pumping passage 5 includes a first pumping passage 51 and a second pumping passage 52.

As shown in fig. 3 and 4, the first pumping channel 51 is sequentially provided with a first channel first connection port 511, a first channel second connection port 512, a first channel third connection port 513 and a first channel fourth connection port 514; the second pumping channel 52 is sequentially provided with a second channel first connection port 521, a second channel second connection port 522, a second channel third connection port 523 and a second channel fourth connection port 524.

The first pumping channel 51 and the second pumping channel 52 penetrate through the valve body 1 along the length direction, a third valve body 15 used for plugging one end of the valve body 1 is fixedly installed at one end of the valve body 1 through a bolt, a first valve body 13 used for plugging the other end of the valve body 1 is fixedly installed at the other end of the valve body through a bolt, a second valve body 14 is fixedly connected to one end, back to the third valve body 15, of the first valve body 13 through a bolt, a flow calculation module is arranged in the first valve body 13, and an aviation plug 141 is arranged on the second valve body 14.

A sealing ring 9 is arranged at the joint of one end of the first pumping channel 51 and the third valve body 15, and a sealing ring 9 is arranged at the joint of the other end of the first pumping channel 51 and the first valve body 13.

A sealing ring 9 is arranged at the joint of one end of the second pumping channel 52 and the third valve body 15, and a sealing ring 9 is arranged at the joint of the other end of the second pumping channel 52 and the first valve body 13.

The liquid outlet passages include a first liquid outlet passage 41 and a second liquid outlet passage 42, the control members include a first control member and a second control member, and the drive oil passage 3 includes a first drive oil passage 31, a second drive oil passage 32, a third drive oil passage 33, and a fourth drive oil passage 34.

The distribution piston comprises a first distribution piston 61 and a second distribution piston 62, the first distribution piston 61 being slidably movable in the first pumping channel 51 and the second distribution piston 62 being slidably movable in the second pumping channel 52.

As shown in fig. 3 and 5, the first distribution piston 61 includes a first cylinder, the first control element includes a first piston first block 711, a first piston second block 712, a first piston third block 713, and a first piston fourth block 714 integrally disposed on the first cylinder in sequence for blocking the first pumping passage 51, and a first piston first ring groove 715, a first piston second ring groove 716, and a first piston third ring groove 717 are sequentially formed between two adjacent blocks.

The second distribution piston 62 includes a second cylinder, the second control element includes a second piston first blocking piece 721, a second piston second blocking piece 722, a second piston third blocking piece 723, and a second piston fourth blocking piece 724 integrally disposed on the second cylinder in sequence for blocking the second pumping channel 52, and a second piston first ring groove 725, a second piston second ring groove 726, and a second piston third ring groove 727 are sequentially formed between two adjacent blocking pieces.

As shown in FIGS. 4 and 5, the loading port 11 is located between the first channel second connection port 512 and the first channel third connection port 513, the first pumping channel 51 is provided with a first channel first outlet 515 at a position between the first channel first connection port 511 and the first channel second connection port 512, the first channel first outlet 515 is located between the first piston first block 711 and the first piston second block 712, the first pumping channel 51 is provided with a first channel second outlet 516 at a position between the first channel third connection port 513 and the first channel fourth connection port 514, and the first channel second outlet 516 is located between the first piston third block 713 and the first piston fourth block 714.

The second pumping channel 52 is provided with a second channel first flow outlet 525 at a position between the second channel first connection port 521 and the second channel second connection port 522, the second channel first flow outlet 525 is positioned between the second piston first block 721 and the second piston second block 722, the second pumping channel 52 is provided with a second channel second flow outlet 526 at a position between the second channel third connection port 523 and the second channel fourth connection port 524, and the second channel second flow outlet 526 is positioned between the second piston third block 723 and the second piston fourth block 724.

As shown in fig. 6, one end of the first liquid outlet passage 41 communicates with the first passage first flow outlet 515 and the second passage first flow outlet 525, the other end communicates with the liquid outlet 12, and one end of the second liquid outlet passage 42 communicates with the first passage second flow outlet 516 and the second passage second flow outlet 526.

The first drive oil passage 31 connects the first passage first connection port 511 and the second passage second connection port 523, the second drive oil passage 32 connects the first passage second connection port 512 and the second passage fourth connection port 521, the third drive oil passage 33 connects the first passage third connection port 513 and the second passage first connection port 524, and the fourth drive oil passage 34 connects the first passage fourth connection port 514 and the second passage third connection port 522.

When the end of the first distribution piston 61 close to the first piston first block 711 collides with the end of the first pumping channel 51, the first channel second connection port 512 is located between the first piston second block 712 and the first piston third block 713, and the first channel third connection port 513 is located between the first piston third block 713 and the first piston fourth block 714; when the other end of the first distribution piston 61 collides with the end of the first pumping passage 51, the first passage second connection port 512 is located between the first piston first block 711 and the first piston second block 712, and the first passage third connection port 513 is located between the first piston second block 712 and the first piston third block 713.

When one end of the second distribution piston 62 close to the second piston first block 721 collides with the end of the second pumping channel 52, the second channel second connection port 522 is located between the second piston second block 722 and the second piston third block 723, and the second channel third connection port 523 is located between the second piston third block 723 and the second piston fourth block 724; when the other end of the second distribution piston 62 collides with the end of the second pumping passage 52, the second passage second connection port 522 is located between the second piston first stopper 721 and the second piston second stopper 722, and the second passage third connection port 523 is located between the second piston second stopper 722 and the second piston third stopper 723.

As shown in fig. 3, the valve body 1 is provided with a stopper 8 that restricts the movement stroke of the first distribution piston 61 and the second distribution piston 62.

As shown in fig. 3 and 4, the limiting member 8 includes a roller, a limiting groove 81 for allowing the roller to slide along the direction from the first distribution piston 61 to the second distribution piston 62 is formed in the valve body 1, one end of the roller and a side wall of the limiting groove 81 are limited by a limiting clip 86, and two ends of the limiting groove 81 are communicated with the first piston second ring groove 716 and the second piston second ring groove 726; the first piston first clamping groove 82 and the first piston second clamping groove 83 distributed along the length direction of the first distribution piston 61 are formed in the bottom of the first piston second ring groove 716, the second piston first clamping groove 84 and the second piston second clamping groove 85 distributed along the length direction of the second distribution piston 62 are formed in the bottom of the second piston second ring groove 726, the bottoms of the first piston first clamping groove 82, the first piston second clamping groove 83, the second piston first clamping groove 84 and the second piston second clamping groove 85 are all arc-shaped groove bottoms, and the side surface of the roller is attached to the arc-shaped groove bottom of one of the clamping grooves in one of the distribution pistons.

When one of the distribution pistons moves, the arc-shaped groove bottom on the distribution piston drives the roller to be far away from the distribution piston along the limiting groove 81, and the roller is clamped into one of the clamping grooves of the other distribution piston, and when the roller is clamped into the clamping groove, the part of the roller far away from the clamped clamping groove is positioned between the second block and the third block of the moving distribution piston and used for abutting against the second block or the third block so as to limit the moving stroke of the moving distribution piston.

As shown in fig. 1 and 4, a forming channel 16 coaxial with the oil passage and penetrating through the side wall of the valve body 1 where the oil passage is located is formed on the valve body 1, and a plugging piece 17 for plugging the forming channel 16 is arranged in the forming channel 16.

The blocking piece 17 comprises a steel ball which is in interference fit with the forming channel 16.

The flow calculation module comprises an inductor and a processor, the inductor is installed at one end, close to the first valve body 13, of the first pumping channel 51 and used for inducing impact of the first control piston and the end wall of the pumping channel 5 and sending an electric signal to the processor, the processor is installed in the first valve body 13 and electrically connected with the inductor and used for receiving the electric signal of the inductor so as to count impact times, and flow is calculated through the impact times.

The implementation principle of the flowmeter in the embodiment of the application is as follows:

initially, as shown in fig. 6, the end of the first distribution piston 61 close to the first piston fourth block 714 interferes with the end of the first pumping channel 51, and the end of the second distribution piston 62 close to the second piston first block 721 interferes with the end of the second pumping channel 52.

When the valve is used, a pipeline of a medium to be tested is connected to the liquid inlet 11, and liquid enters the valve body 1 through the liquid inlet 11.

Since the end of the first piston fourth block 714 now abuts the end of the first pumping channel 51, the intake port 11, the first piston first ring groove 715, the first channel third connection port 513, the second channel fourth connection port 524 are connected, and the liquid enters the end of the second pumping channel 52 where the second channel fourth connection port 524 is located from the intake port 11, the second distribution piston 62 does not move because the end of the second distribution piston 62 near the second piston first block 721 has moved to the maximum position; on the other hand, since one end of the first plug of the second piston abuts against the end of the second pumping channel 52, the second piston second block 722 is located on the side of the second channel second connection port 522 opposite to the second channel third connection port 523, so that the second piston first ring groove 725 is communicated with the second channel second connection port 522, and the liquid enters one end of the first pumping channel 51 near the first piston fourth block 714 along the liquid inlet 11, the second piston first ring groove 725, the second channel second connection port 522, and the first channel fourth connection port 514 in this order, at this time, the liquid at the end of the first pumping channel 51 near the first piston first block 711 is communicated with the liquid outlet 12 through the first channel first connection port 511, the second channel third connection port 523, the second piston third ring groove 727, and the second channel second flow outlet 526, and the first piston fourth block 714 is pushed by the liquid entering the first pumping channel 51 near the first piston fourth block 714, the first distribution piston 61 is moved towards the first piston first block 711 and abuts against the end of the first pumping channel 51 near the first piston first block 711, and the original liquid at this position is discharged through the liquid outlet 12, thereby completing the discharge of the first unit amount of liquid.

At this time, moving to the position shown in fig. 7, as the first piston second blocking piece 712 moves to a position between the first channel first outlet 515 and the first channel second connecting port 512, so that the first piston second annular groove 716 is communicated with the first channel second connecting port 512, the liquid at the liquid inlet 11 enters the end of the second pumping channel 52 close to the second piston first blocking piece through the first piston second annular groove 716, the first channel second connecting port 512; on the other hand, the first piston third block 713 is located on the side of the first channel third connecting port 513 opposite to the first channel second outlet 516, the second channel fourth connecting port 524, the first channel third connecting port 513, the first piston third ring groove 717, the first channel second outlet 516 and the liquid outlet 12 are communicated, the liquid flowing into the end of the second pumping channel 52 close to the second piston first block 721 pushes the second piston first block 721, so that the second distribution piston 62 moves towards the second piston fourth block 724 and finally collides with the end of the second pumping channel 52 close to the second piston fourth block, and the liquid at the position is discharged along the second channel fourth connecting port 524, the first channel third connecting port 513, the first piston third ring groove 717, the first channel second outlet 516 and the liquid outlet 12 during the movement.

At this time, moving to the position shown in fig. 8, the second piston second block 722 is located between the second channel second connection port 522 and the second channel third connection port 523, such that the second channel second connection port 526 is communicated with the second channel second connection port 522, and the second channel second connection port 522 is communicated with the first channel fourth connection port 514, such that the liquid in the end of the first pumping channel 51 near the first piston fourth block 714 is communicated with the liquid outlet 12 through the first channel fourth connection port 514, the second channel second connection port 522, the second channel second connection port 526; on the other hand, as the second piston second blocking block 722 moves to the position of the second passage second connection port 522 and the second passage third connection port 523, the connection relationship between the second piston second annular 726 groove and the second passage second connection port 522 is disconnected; the second piston third block 723 moves to a position between the second channel third connecting port 523 and the second channel second outlet 526, the communication relation between the second channel third connecting port 523 and the second channel second outlet 526 is broken, the second channel third connecting port 523 and the second channel second outlet 526 are communicated, the second channel third connecting port 523 and the second piston second annular groove are communicated, so that the liquid entering from the liquid inlet 11 passes through the second piston second annular groove 726 and the second channel third connecting port 523, the first channel connecting port enters the end part of the first pumping channel 51 close to the first piston first block 711, and pushes the first piston first block 711 to enable the first distribution piston 61 to move towards the fourth plug of the first piston and to be in interference with the end part of the first pumping channel 51 close to the fourth plug of the first piston, and the original liquid at the position is moved along the first channel fourth connecting port 514, the second channel second connecting port 522, the second channel second outlet 526, The direction of the liquid outlet 12 is discharged.

At this time, the first channel second connection port 512, the first piston first ring groove 715, the first channel first outflow port 515, and the liquid outlet 12 are communicated due to the fact that the first channel second connection port 512 and the first channel third connection port 513 are located between each other as shown in fig. 9; the first piston third block 713 is located between the first channel third connection port 513 and the first channel second connection port 516, the first piston second block 712 is located on the side of the first channel second connection port 512 opposite to the first channel first connection port 515, such that the inlet 11, the first channel third connection port 513 and the second channel fourth connection port 524 are communicated, such that the liquid of the inlet 11 enters the end of the second pumping channel 52 near the second piston fourth block 724 and pushes the end of the second piston fourth block 724, such that the second distribution piston 62 moves towards the second piston first block 721, such that the end of the second distribution piston 62 near the second piston first block 721 is in interference with the end of the second pumping channel 52, and such that the original liquid at this position is communicated along the first channel second connection port 512, the first piston first ring groove 715, the first channel first connection port 515, The first channel first outlet 515 is connected to the outlet 12.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A flow meter, characterized by: the valve comprises a valve body (1), a pump-out module (2) and a flow calculation module, wherein the pump-out module (2) and the flow calculation module are arranged on the valve body (1), the valve body (1) is provided with a liquid inlet (11) and a liquid outlet (12), the pump-out module (2) comprises a driving oil duct (3) arranged in the valve body (1), a liquid outlet oil duct, a pumping channel (5), a distribution piston and a control piece arranged on the distribution piston, the driving oil duct (3) is connected with the end part of the pumping channel (5) and the liquid inlet (11), the liquid outlet oil duct is connected with the driving oil duct (3) and the liquid outlet (12), the distribution piston is connected in the pumping channel (5) in a sliding manner, and the control piece is used for disconnecting the liquid outlet oil duct on the driving oil duct (3) when the driving oil duct (3) at one end of the pumping channel (5), The driving oil duct (3) is communicated with the liquid outlet oil duct, the calculating template is arranged on the valve body (1) and used for detecting the contact times of the pumping piston and the end part of the pumping channel (5), and the flow is calculated according to the contact times multiplied by the volume of each collision.

2. The flowmeter of claim 1, wherein: the pumping channel (5) comprises a first pumping channel (51) and a second pumping channel (52), the distribution piston comprises a first distribution piston (61) and a second distribution piston (62), the first distribution piston (61) slides in the first pumping channel (51), the second distribution piston (62) slides in the second pumping channel (52), the control part comprises a first control part and a second control part, and the first pumping channel (51) is sequentially provided with a first channel first connecting port (511), a first channel second connecting port (512), a first channel third connecting port (513) and a first channel fourth connecting port (514); a second channel first connecting port (521), a second channel second connecting port (522), a second channel third connecting port (523) and a second channel fourth connecting port (524) are sequentially formed in the second pumping channel (52); the first channel first connecting port (511) is communicated with the second channel second connecting port (523) to form a first driving oil channel (31), the first channel second connecting port (512) is communicated with the second channel fourth connecting port (521) to form a second driving oil channel (32), the first channel third connecting port (513) is communicated with the second channel first connecting port (524) to form a third driving oil channel (33), and the first channel fourth connecting port (514) is communicated with the second channel third connecting port (522) to form a fourth driving oil channel (34); the first distribution piston (61) comprises a first cylinder, the first control part comprises a first piston first blocking block (711), a first piston second blocking block (712), a first piston third blocking block (713) and a first piston fourth blocking block (714) which are sequentially arranged on the first cylinder and used for blocking the first pumping channel (51), and a first piston first ring groove (715), a first piston second ring groove (716) and a first piston third ring groove (717) are sequentially formed between every two adjacent blocking blocks; the second distribution piston (62) comprises a second cylinder, the second control piece comprises a second piston first blocking piece (721), a second piston second blocking piece (722), a second piston third blocking piece (723) and a second piston fourth blocking piece (724) which are sequentially arranged on the second cylinder and used for blocking the second pumping channel (52), and a second piston first ring groove (725), a second piston second ring groove (726) and a second piston third ring groove (727) are sequentially formed between every two adjacent blocking pieces; the liquid inlet (11) is positioned between a first channel second connecting port (512) and a first channel third connecting port (513), a first channel first outlet (515) is arranged between a first channel first connecting port (511) and the first channel second connecting port (512), the first channel first outlet (515) is positioned between a first piston first block (711) and a first piston second block (712), a first channel second outlet (516) is arranged between the first channel third connecting port (513) and a first channel fourth connecting port (514), and the first channel second outlet (516) is positioned between a first piston third block (713) and a first piston fourth block (714); a second channel first flow outlet (525) is arranged between the second channel first connecting port (521) and the second channel second connecting port (522), the second channel first flow outlet (525) is positioned between a second piston first block (721) and a second piston second block (722), a second channel second flow outlet (526) is arranged between the second channel third connecting port (523) and the second channel fourth connecting port (524), and the second channel second flow outlet (526) is positioned between a second piston third block (723) and a second piston fourth block (724); the liquid outlet oil passage comprises a first liquid outlet oil passage (41) and a second liquid outlet oil passage (42), and the first liquid outlet oil passage (41) is simultaneously communicated with a first channel first outlet (515) and a second channel first outlet (525) and then communicated with the liquid outlet (12); the second liquid outlet channel (42) is communicated with the first channel second flow outlet (516) and the second channel second flow outlet (526) at the same time and then is communicated with the liquid outlet (12); when one end of the first distribution piston (61) close to the first piston first block (711) is abutted against the end of the first pumping channel (51), the first channel second connecting port (512) is positioned between the first piston second block (712) and the first piston third block (713), and the first channel third connecting port (513) is positioned between the first piston third block (713) and the first piston fourth block (714); when the other end of the first distribution piston (61) is abutted against the end of the first pumping channel (51), the first channel second connecting port (512) is positioned between the first piston first block (711) and the first piston second block (712), and the first channel third connecting port (513) is positioned between the first piston second block (712) and the first piston third block (713); when one end of the second distribution piston (62) close to the second piston first block (721) collides with the end of the second pumping channel (52), the second channel second connecting port (522) is positioned between the second piston second block (722) and the second piston third block (723), and the second channel third connecting port (523) is positioned between the second piston third block (723) and the second piston fourth block (724); when the other end of the second distribution piston (62) collides with the end of the second pumping passage (52), the second passage second connection port (522) is located between the second piston first block (721) and the second piston second block (722), and the second passage third connection port (523) is located between the second piston second block (722) and the second piston third block (723).

3. The flowmeter of claim 1, wherein: the flow calculation module comprises an inductor and a processor, the inductor is arranged on the valve body (1) and used for inducing the impact between the first control piston or the second control piston and the end wall of the pumping channel (5) and sending an electric signal to the processor, and the processor is electrically connected with the inductor and used for receiving the electric signal of the inductor so as to count the impact times and calculate the flow through the impact times.

4. The flowmeter of claim 1, wherein: the valve body (1) is provided with a limiting piece (8) for limiting the moving strokes of the first distribution piston (61) and the second distribution piston (62).

5. The flowmeter of claim 4, wherein: the limiting piece (8) comprises a roller, a limiting groove (81) for the roller to slide along the direction from the first distribution piston (61) to the second distribution piston (62) is formed in the valve body (1), and two ends of the limiting groove (81) are communicated with the first piston second ring groove (716) and the second piston second ring groove (726); the bottom of the first piston second ring groove (716) is provided with a first piston first clamping groove (82) and a first piston second clamping groove (83) which are distributed along the length direction of the first distribution piston (61), the bottom of the second piston second ring groove (726) is provided with a second piston first clamping groove (84) and a second piston second clamping groove (85) which are distributed along the length direction of the second distribution piston (62), the bottoms of the first piston first clamping groove (82), the first piston second clamping groove (83), the second piston first clamping groove (84) and the second piston second clamping groove (85) are arc-shaped groove bottoms, and the side surface of the roller is attached to the arc-shaped groove bottom of one clamping groove on one distribution piston; when one of the distribution pistons moves, the arc-shaped groove bottom on the distribution piston drives the roller to be far away from the distribution piston along the limiting groove (81), the roller is clamped into one of the clamping grooves of the other distribution piston, and when the roller is clamped into the clamping groove, the part of the roller far away from the clamped clamping groove is positioned between the second block and the third block of the moving distribution piston and used for abutting against the second block or the third block so as to limit the moving stroke of the moving distribution piston.

6. The flowmeter of claim 1, wherein: the oil-way-blocking valve is characterized in that a forming channel (16) which is coaxial with the oil way and penetrates through the side wall of the valve body (1) on the side where the oil way is located is formed in the valve body (1), and a blocking piece (17) for blocking the forming channel (16) is arranged in the forming channel (16).

7. The flowmeter of claim 6, wherein: the blocking piece (17) comprises a steel ball arranged in the forming channel (16).

8. A flowmeter according to claim 2, wherein: one end of the valve body (1) is provided with a first valve body (13), and the flow calculation module is arranged in the first valve body (13).

9. The flowmeter of claim 8, wherein: first pumping passageway (51) and second pumping passageway (52) run through along length direction valve body (1), be provided with third valve body (15) on valve body (1), third valve body (15) and first valve body (13) are located valve body (1) respectively and are just used for plugging up the both ends of first pumping passageway (51), second pumping passageway (52) along the both ends of distributing piston moving direction.

10. The flowmeter of claim 8, wherein: the valve body (1) is provided with a second valve body (14), and the second valve body (14) is provided with an aviation plug (141).