CN108375397B - Milk flowmeter - Google Patents
Milk flowmeter Download PDFInfo
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- CN108375397B CN108375397B CN201810312506.4A CN201810312506A CN108375397B CN 108375397 B CN108375397 B CN 108375397B CN 201810312506 A CN201810312506 A CN 201810312506A CN 108375397 B CN108375397 B CN 108375397B
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- milk
- housing
- flow
- rotating seat
- rotating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a milk flowmeter, which comprises a flow metering part connected with a milk conveying pipeline, wherein the flow metering part comprises a rotating shaft, a rotating seat, a plurality of partition boards and a plurality of turning plates, the rotating seat is provided with a cavity, the rotating shaft penetrates through the cavity, the upper end of the rotating seat is provided with a milk inflow port, and the lower end of the rotating seat is provided with a milk outflow port; the plurality of clapboards are arranged on the rotating seat, a turning plate is arranged between every two clapboards, so that the flow metering part forms a plurality of closed milk flow metering chambers, and the turning plate can move up and down between the clapboards; an arc-shaped track is arranged on the inner wall of the rotating seat cavity, the up-and-down movement of the turning plate is limited by the arc-shaped track; a rotational speed measuring part, which comprises a rotational speed measuring disk body, the rotational speed measuring disk body and the flow measuring part coaxially rotate, a magnetic element for generating a magnetic field is included on the tachometer disk body; and an electronic pulse measuring unit for covering the rotational speed measuring unit.
Description
Technical Field
The invention relates to the technical field of meters, in particular to a milk flowmeter.
Background
At present, the domestic large-scale dairy farm gradually performs fine management on production management, and the urgent need is to measure the milk yield of each cow, calculate feed rewards according to the yield, adjust total mixed ration, namely TMR formula, or perform data necessary for DHI measurement, or serve breeding, and the like. Robotic milking is a necessary trend in the future milk industry, the milk flowmeter is one of the essential components, and is the most central component for the robot milking.
The existing milk flowmeter is high in price, complex in use and not high enough in measurement precision, is difficult to adapt to the requirement of the Chinese cow breeding development on the precision of metering, and is not suitable for the modern management of a large dairy farm. Thus, there is a need to develop a new milk flowmeter.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a milk flowmeter capable of accurately measuring the milk flow in real time.
The milk flowmeter provided by the invention comprises a flow metering part connected with a milk conveying pipeline, wherein the flow metering part comprises a rotating shaft, a rotating seat, a plurality of partition boards and a plurality of turning plates, the rotating seat is provided with a cavity, the rotating shaft penetrates through the cavity, the upper end of the rotating seat is provided with a milk inflow port, and the lower end of the rotating seat is provided with a milk outflow port; the plurality of clapboards are arranged on the rotating seat, the turning plate is arranged between every two clapboards, so that the flow metering part forms a plurality of closed milk flow metering chambers, and the turning plate can move up and down between the clapboards; an arc-shaped track is arranged on the inner wall of the rotating seat cavity, and the up-and-down movement of the turning plate is limited by the arc-shaped track; along with the increase of the inflow milk quantity in the milk flow measuring chamber, the turning plate can move up and down along the arc-shaped track under the action of the gravity of milk to push the rotating seat to rotate around the rotating shaft, so that the flow measuring part rotates;
a rotational speed measuring section including a rotational speed measuring disk body that rotates coaxially with the flow measuring section, the rotational speed measuring disk body including a magnetic element for generating a magnetic field thereon; and
the electronic pulse metering part is covered with the rotating speed metering part and comprises a Hall element and an electronic pulse element corresponding to the Hall element in position, the rotation of the magnetic element can enable the Hall element to generate a Hall effect, the rotating speed of the rotating speed metering part is converted into a pulse signal, and the electronic pulse element is used for counting and analyzing the pulse signal and outputting an instantaneous flow value of milk flow.
In one embodiment, the device further comprises a first shell covering the flow metering part and the rotating speed metering part, an inner shell extending from the bottom of the shell to the upper part is arranged in the first shell, the rotating speed metering disc body is arranged above the inner shell, the flow metering part is arranged in the inner shell, one end of the partition plate is connected to the rotating seat, the other end of the partition plate is connected to the inner shell, an arc-shaped track is arranged on the inner wall of the inner shell, and the turning plate is respectively connected with the rotating seat and the inner shell in a rolling manner.
In one embodiment, the surfaces of the turning plate, which are in contact with the rotating seat and the spherical crown shell, are respectively provided with rollers, and the rollers are respectively arranged in the arc-shaped track.
In one embodiment, the arc-shaped track is provided with concave-convex grooves, and the rollers of the turning plate are embedded in the grooves.
In one embodiment, the magnetic elements are arranged in a plurality, and are distributed on circumference tracks with different radiuses of the revolution metering disc body in a staggered manner.
In one embodiment, the rotation speed measuring part includes a second housing provided at an upper portion of the rotation speed measuring part, and the hall element and the electronic pulse element are provided on the second housing, respectively.
In one embodiment, the second housing includes an outer housing and an inner housing, the inner housing is adjacent to the magnetic element, the hall element is disposed on the inner housing, the electronic pulse element is disposed on the outer housing, and the electronic pulse element corresponds in position to the hall element.
In one embodiment, the number of the hall elements and the number of the electronic pulse elements are each set to be plural, and the number is the same.
In one embodiment, the electronic pulse converts the pulse signal into a milk flow instantaneous flow value by formula (I):
Q＝K×P×ΔV/T(I)；
wherein K is a data processing coefficient, Q is the measured instantaneous milk flow, P is the number of pulses sent by the Hall element, deltaV is the volume of a single milk flow measuring chamber, and T is the measuring time.
In one embodiment, the inner shell of the first shell is hollow spherical crown, an opening is formed in the bottom of the inner shell, and the rotating shaft penetrates out of the opening.
From the above, it can be seen that, according to the milk flowmeter provided by the embodiment of the invention, milk flows into the flow metering part from the inflow inlet, and flows out from the outflow outlet after the metering chamber is filled with milk, so that gravity difference is generated on the upper side and the lower side of the turning plate, the turning plate is pushed to move up and down along the arc-shaped track in the rotating seat, the flow metering part can rotate, and the flow can be tested for each metering chamber after one rotation; the rotating speed is converted into a pulse signal, the pulse signal is analyzed and processed by the electronic pulse element, the rotating speed metering part and the flow metering part synchronously rotate, a magnetic field is generated through the rotation of the magnetic element on the surface of the rotating speed metering part, the Hall element generates the pulse signal through the Hall effect, the pulse signal is received and counted through the electronic pulse element, and therefore, the instantaneous milk flow value is obtained, and the milk flow can be accurately measured in real time.
Drawings
FIG. 1 is a perspective view of a milk flowmeter according to an embodiment of the present invention;
fig. 2 is a first structural diagram of a flow rate measuring section according to an embodiment of the present invention;
FIG. 3 is a second block diagram of a flow meter according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a rotational speed measuring unit according to an embodiment of the present invention;
wherein the first housing 100;
an upper opening 110;
a lower opening 120;
an inner case 130;
a flow rate measuring unit 200;
a milk flow metering chamber 210;
a rotating base 220;
a partition 230;
a flap 240;
a rotation shaft 250;
a rotation speed measuring unit 300;
a magnetic element 310;
a tachometer tray 320;
a rotational speed measuring shaft 330;
a positioning member 331.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
The embodiment of the invention provides a milk flowmeter, which comprises a flow metering part connected with a milk conveying pipeline, wherein the flow metering part comprises a rotating shaft, a rotating seat, a plurality of baffle plates and a plurality of turning plates, the rotating seat is provided with a cavity, the rotating shaft penetrates through the cavity, the upper end of the rotating seat is provided with a milk inflow port, the lower end of the rotating seat is provided with a milk outflow port, the plurality of baffle plates are arranged on the rotating seat, the turning plates are arranged between every two baffle plates, so that the flow metering part forms a plurality of closed milk flow metering chambers, and the turning plates can move up and down between the baffle plates; an arc-shaped track is arranged on the inner wall of the rotating seat cavity, and the up-and-down movement of the turning plate is limited by the arc-shaped track; along with the increase of the inflow milk quantity in the milk flow measuring chamber, the turning plate can move up and down along the arc-shaped track under the action of the gravity of milk to push the rotating seat to rotate around the rotating shaft, so that the flow measuring part rotates;
a rotational speed measuring section including a rotational speed measuring disk body that rotates coaxially with the flow measuring section, the rotational speed measuring disk body including a magnetic element for generating a magnetic field thereon; and
the electronic pulse metering part is covered with the rotating speed metering part and comprises a Hall element and an electronic pulse element corresponding to the Hall element in position, the rotation of the magnetic element can enable the Hall element to generate a Hall effect, the rotating speed of the rotating speed metering part is converted into a pulse signal, and the electronic pulse element is used for counting and analyzing the pulse signal and outputting an instantaneous flow value of milk flow.
According to the milk flowmeter provided by the embodiment of the invention, milk flows into the flow metering part from the inflow port, and flows out from the outflow port after the metering chamber is filled with milk, so that gravity difference is generated on the upper side and the lower side of the turning plate, the turning plate is pushed to move up and down along the arc-shaped track in the rotating seat, the flow metering part can rotate, and the flow can be tested for each metering chamber after one rotation; the rotating speed is converted into a pulse signal, the pulse signal is analyzed and processed by the electronic pulse element, the rotating speed metering part and the flow metering part synchronously rotate, a magnetic field is generated through the rotation of the magnetic element on the surface of the rotating speed metering part, the Hall element generates the pulse signal through the Hall effect, the pulse signal is received and counted through the electronic pulse element, and therefore, the instantaneous milk flow value is obtained, and the milk flow can be accurately measured in real time.
Referring to fig. 1, the milk flowmeter provided by the embodiment of the invention includes a first housing 100 covering a flowmeter portion 200, an inner housing 130 extending from the bottom to the top of the first housing 100 is disposed in the first housing 100, the flowmeter portion 200 is disposed in the inner housing 130, one end of a partition 230 is connected to the rotating base, the other end is connected to the inner housing 130, an arc-shaped track is disposed on an inner wall of the inner housing 130, and the turning plate 240 is respectively connected with the rotating base 220 and the inner housing 130 in a rolling manner.
Referring to fig. 2 and 3, the diaphragm 230 has a fan shape, and the rotating base 220 preferably has a spherical shape so that the diaphragm 230 is better contacted with the rotating base 220 and the inner surface of the inner case 130. The flap 240 is movably disposed between each two of the partitions 230 and can move up and down along the first housing 100. The turning plate 240 has a first side, a second side, a third side and a fourth side, which are respectively connected with the two partition plates 230, the rotating seat 220 and the inner surface of the inner shell 130, the ends of the third side and the fourth side are respectively provided with rollers, and the inner wall of the cavity of the rotating seat 220 and the arc-shaped track of the inner surface of the spherical cap shell 130 are correspondingly provided with grooves. The swivel base 220, the partition 230, the flap 240 and the surface of the inner housing 130 together form the milk flow measuring chamber 210. The number of milk flow measuring chambers 210 is set to tens. The end of the rotating shaft 250 is provided with a positioning structure to fix the rotating shaft 250.
Preferably, the grooves of the arc-shaped rails of the inner surface of the inner case 130 are provided with concavo-convex undulations so that the rollers of the flap 240 are better fitted in the grooves. The area of the groove near the milk inlet is convex to lift the flap 240, so that milk flow is better sucked into the milk flow measuring chamber 210, and the area of the groove near the milk outlet is concave to press down the flap 240, so that milk in the measuring chamber 210 is better discharged in sequence.
Referring to fig. 4, the tachometer portion 300 preferably includes a tachometer disk 320 and a tachometer shaft 330. The rotational speed measuring shaft 330 is disposed at the lower part of the rotational speed measuring disc 320, is engaged with the rotating shaft 250, and can rotate synchronously with the flow measuring unit 200, and has the same rotational speed as the flow measuring unit 200, so that the rotational speed measuring unit 300 and the flow measuring unit 200 rotate coaxially. The magnetic element 310 is disposed on the upper surface of the tachometer disk 320, and is capable of generating a magnetic field, so that the hall element can generate a pulse signal when passing through the hall element during rotation.
Further, a positioning piece 331 is disposed at the end of the tachometer shaft body 330, so that the tachometer shaft body 330 is clamped in the rotating shaft 250.
The number of the magnetic elements 310 is set to be plural, and may be a magnetic steel sheet. The plurality of magnetic steel sheets can be uniformly distributed on the circumferential tracks with the same radius of the tachometer disk body 320, or can be distributed on the circumferential tracks with different radii. Preferably, the plurality of magnetic steel sheets are distributed on a plurality of circumferential tracks with different radiuses, and each magnetic steel sheet is distributed in a staggered manner, so that the electronic resolution of the rotating angle of the disc is improved, and the metering precision is improved.
The rotation speed measuring part 300 includes a second housing provided at an upper portion of the rotation speed measuring part 300, and the hall element and the electronic pulse element are provided on the second housing, respectively.
Preferably, the second housing includes an outer housing and an inner housing. The outer shell can protect the milk flowmeter and prevent water drops, dust, scraps and other impurities from entering. Preferably, the inner surface of the outer casing is provided with said electronic pulse element. The electronic pulse element can be an electronic pulse metering unit, and the number of the electronic pulse metering unit is a plurality of electronic pulse metering circuit boards. The electronic pulse metering circuit board can receive the electronic pulses in quantity, calculate the quantity of the electronic pulses received in the analysis unit time, and obtain the instantaneous flow value of milk flow through the analysis processing of the formula (I). The inner housing is close to the magnetic element 310, and a plurality of hall elements are provided on the surface thereof away from the tachometer disk 300, i.e., the outer surface. Preferably, the hall elements are in one-to-one correspondence with the positions of the electronic pulse metering units, so as to more accurately receive the pulse signals sent by the hall elements.
Preferably, the first housing 100 is connected to the second housing in a clamping manner, and forms an integral housing. The flow metering part 200 and the rotation speed metering part 300 in the inside are fixed and accommodated with protection, so that the external impurities are prevented from entering and damaging grinding marks and the like generated after entering.
The milk flow meter comprises a second shell and a first shell 100 which are connected in a clamping way, wherein the second shell and the first shell form an integral shell, and a rotating speed measuring part 300 and a flow rotating measuring part 200 are sequentially contained from top to bottom in the integral shell. The outer surface of the inner layer shell of the second shell is provided with a plurality of Hall elements, and the inner surface of the outer shell is correspondingly provided with an electronic pulse metering unit. A plurality of axially parallel magnetic steel sheets are distributed in a staggered manner on a plurality of circumferential tracks with different radiuses of the rotation speed measuring disc 320, and a shaft body 330 at the lower part of the rotation speed measuring disc 320 is clamped in a rotating shaft 240 of the flow measuring part 200. The fan-shaped partition 230, the flap 240, the swivel seat 220 with hollow cavity of the flow meter 200 and the hollow spherical cap inner shell of the first housing 100 together form the milk flow meter chamber 210.
When the milk flowmeter of the invention is used, milk is conveyed to the flow metering part 200 from the milk conveying pipeline, flows into/out of the milk flow metering chamber 210 from the milk inflow/outflow opening, and along with the increase of the milk flow in the milk flow metering chamber 210, the turning plate 240 can move downwards along the rotating seat 220 under the action of the gravity of the milk to push the rotating seat 220 to rotate around the rotating shaft 250, so that the flow metering part 200 rotates and performs circular rotation. In the milk inflow opening area, milk flows in, and the flap 240 slides down from the top of the rotary seat 220 until milk fills the metering chamber; when the surface of the flap 240 is then lower than the milk outlet, the flap 240 is lifted, slid upward, and the milk is discharged in sequence. The flow metering part 200 rotates once, and each metering chamber can finish metering milk once. The tachometer disk 300 rotates synchronously with the flow meter 200 via the tachometer shaft 330, and during rotation, magnetic fields are continuously generated by the dislocated magnetic steel sheets passing through the hall element. The Hall element generates pulse signals under the action of a magnetic field, and the pulse signals are counted, analyzed and processed through an electronic pulse metering unit corresponding to the Hall element to output the instantaneous flow value of milk flow.
It should be noted that, in the embodiments of the present invention, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present invention, and the following embodiments are not described one by one.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
While the invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (10)
1. The milk flowmeter is characterized by comprising a flow metering part (200) connected with a milk conveying pipeline, wherein the flow metering part (200) comprises a rotating shaft (250), a rotating seat (220), a plurality of partition plates (230) and a plurality of turning plates (240), the rotating seat (220) is provided with a cavity, the rotating shaft (250) penetrates through the cavity, the upper end of the rotating seat (220) is provided with a milk inflow port, and the lower end of the rotating seat is provided with a milk outflow port; the plurality of clapboards (230) are arranged on the rotating seat (220), the turning plate (240) is arranged between every two clapboards (230), the flow metering part (200) forms a plurality of closed milk flow metering chambers (210), and the turning plate (240) can move up and down between the clapboards (230); an arc-shaped track is arranged on the inner wall of the rotating seat cavity, and the up-down movement of the turning plate (240) is limited by the arc-shaped track; as the milk quantity in the milk flow measuring chamber (210) increases, the turning plate (240) can move up and down along the arc-shaped track under the gravity action of milk, and the rotating seat (220) is pushed to rotate around the rotating shaft (250) so as to enable the flow measuring part (200) to rotate;
a rotational speed measurement unit (300), wherein the rotational speed measurement unit (300) comprises a rotational speed measurement disk body (320), the rotational speed measurement disk body (320) and the flow measurement unit (200) coaxially rotate, and a magnetic element (310) for generating a magnetic field is arranged on the rotational speed measurement disk body (320); and
the electronic pulse metering part is covered with the rotating speed metering part (300) and comprises a Hall element and an electronic pulse element corresponding to the Hall element in position, the rotation of the magnetic element (310) can enable the Hall element to generate a Hall effect, the rotating speed of the rotating speed metering part (300) is converted into a pulse signal, and the electronic pulse element is used for counting and analyzing the pulse signal and outputting an instantaneous flow value of milk;
wherein the partition (230) is fan-shaped.
2. The milk flowmeter of claim 1, further comprising a first housing (100) covering the flowmeter portion (200) and the rotational speed measuring portion (300), wherein an inner housing (130) extending from the bottom to the upper portion of the housing is provided in the first housing (100), the rotational speed measuring disk (320) is provided above the inner housing (130), the flowmeter portion (200) is provided in the inner housing (130), one end of the partition plate (230) is connected to the rotating base (220), the other end is connected to the inner housing (130), an arc-shaped track is provided on the inner wall of the inner housing (130), and the turning plate (240) is respectively connected with the rotating base (220) and the inner housing (130) in a rolling manner.
3. Milk flowmeter according to claim 2, characterized in that said flaps (240) are provided with rollers on the surfaces in contact with said rotary seat (220) and with the spherical cap housing, respectively, said rollers being provided in said arcuate tracks, respectively.
4. A milk flowmeter according to claim 3, characterized in that said arcuate track is provided with a relief groove, in which the roller of said flap (240) is embedded.
5. Milk flowmeter according to claim 1, characterized in that said magnetic elements (310) are provided in plurality, offset distributed on circumferential tracks of different radii of said tachometer disk (320).
6. Milk flowmeter according to claim 1, characterized in that said tachometer portion (300) comprises a second housing provided at an upper portion of said tachometer portion (300), said hall element and said electronic pulse element being provided respectively on said second housing.
7. The milk flowmeter of claim 6, wherein the second housing comprises an outer housing and an inner housing, the inner housing being proximate the magnetic element (310), the hall element being disposed on the inner housing, the electronic pulse element being disposed on the outer housing, the electronic pulse element corresponding in position to the hall element.
8. The milk flowmeter of claim 6, wherein the number of hall elements and the number of electronic pulse elements are each plural and the same.
9. The milk flowmeter of claim 1, wherein the electronic pulse element converts the pulse signal to a milk flow instantaneous flow value by formula (I):
Q＝K×P×ΔV/T(I)；
wherein K is a data processing coefficient, Q is the measured instantaneous milk flow, P is the number of pulses sent by the Hall element, deltaV is the volume of a single milk flow measuring chamber (210), and T is the measuring time.
10. Milk flowmeter according to claim 2, characterized in that the inner shell (130) of the first housing (100) is hollow spherical crown-shaped, the bottom of which is provided with an opening, from which the shaft (250) passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810312506.4A CN108375397B (en) | 2018-04-09 | 2018-04-09 | Milk flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810312506.4A CN108375397B (en) | 2018-04-09 | 2018-04-09 | Milk flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108375397A CN108375397A (en) | 2018-08-07 |
| CN108375397B true CN108375397B (en) | 2023-10-10 |
Family
ID=63031962
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810312506.4A Active CN108375397B (en) | 2018-04-09 | 2018-04-09 | Milk flowmeter |
Country Status (1)
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| CN (1) | CN108375397B (en) |
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| US4646568A (en) * | 1985-05-06 | 1987-03-03 | Lew Hyok S | Flap pump-flow meter |
| US4865092A (en) * | 1987-02-20 | 1989-09-12 | Sig Schweizerische Industrie-Gesellschaft | Volumetric metering apparatus for granular material |
| US5016569A (en) * | 1988-05-05 | 1991-05-21 | Latviiskaya Selskhokhozyaistvennaya Akademia | Automatic milk counter of milking unit |
| US5440926A (en) * | 1994-01-24 | 1995-08-15 | Lew; Hyok S. | Folding-unfolding rotary vane meter-motor-pump |
| WO2010098124A1 (en) * | 2009-02-26 | 2010-09-02 | オリオン機械株式会社 | Milk meter and milking device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101112224B1 (en) * | 2010-12-03 | 2012-02-14 | (주) 원티엘 | A device for measuring flow of a meter and a method the same |
| NL2015620B1 (en) * | 2015-10-15 | 2017-05-08 | N V Nederlandsche Apparatenfabriek Nedap | Milk meter. |
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| US3630081A (en) * | 1970-01-06 | 1971-12-28 | Lavel Separator Co The De | Milk metering apparatus |
| US4646568A (en) * | 1985-05-06 | 1987-03-03 | Lew Hyok S | Flap pump-flow meter |
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| US5440926A (en) * | 1994-01-24 | 1995-08-15 | Lew; Hyok S. | Folding-unfolding rotary vane meter-motor-pump |
| WO2010098124A1 (en) * | 2009-02-26 | 2010-09-02 | オリオン機械株式会社 | Milk meter and milking device |
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| CN108375397A (en) | 2018-08-07 |
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