CN110042937B - Drainage structure of externally hung wallboard of assembled building - Google Patents
Drainage structure of externally hung wallboard of assembled building Download PDFInfo
- Publication number
- CN110042937B CN110042937B CN201910414451.2A CN201910414451A CN110042937B CN 110042937 B CN110042937 B CN 110042937B CN 201910414451 A CN201910414451 A CN 201910414451A CN 110042937 B CN110042937 B CN 110042937B
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- air
- vent hole
- external wall
- way valve
- drainage
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000005192 partition Methods 0.000 claims abstract description 31
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/70—Drying or keeping dry, e.g. by air vents
- E04B1/7038—Evacuating water from cavity walls, e.g. by using weep holes
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/70—Drying or keeping dry, e.g. by air vents
- E04B1/7069—Drying or keeping dry, e.g. by air vents by ventilating
- E04B1/7076—Air vents for walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
- E04C2/52—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits
- E04C2/521—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
- E04C2/52—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits
- E04C2/521—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling
- E04C2/523—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling for ventilating
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Building Environments (AREA)
- Check Valves (AREA)
Abstract
The invention belongs to the technical field of building equipment, and particularly discloses an assembled building external wall board drainage structure, which comprises a drainage box arranged below a cavity of an external wall board, wherein the top of the drainage box is provided with a water inlet, and the side surface of the drainage box is provided with a water outlet; the water drainage box is internally provided with a horizontal partition plate which is fixedly connected with the top of the water drainage box through a tension spring; the device also comprises an air duct, a first vent hole is formed in the air duct, and a first one-way valve is arranged on the first vent hole; the horizontal partition plate is provided with a plunger, a second vent hole with a T-shaped longitudinal section is formed in the plunger, and a second one-way valve is arranged on the second vent hole; the air duct is also provided with an auxiliary air duct which is used for communicating the first vent hole and the second vent hole. The drainage structure of the external wall panel can thoroughly and timely drain rainwater in the cavity of the external wall panel.
Description
Technical Field
The invention belongs to the technical field of building equipment, and particularly discloses an assembled building external wall board drainage structure.
Background
The external wall board of the assembled building is a peripheral protection structure of an inner wall, and when in production, after the external wall board is split according to certain specification, the external wall board is prefabricated in a factory, then transported to the site for assembly, and the assembly part is treated by glue spraying. Because a large number of spliced joints are left when the external wall board is spliced, rainwater can infiltrate between the external wall board and the inner wall through the joints, and a cavity is left in the external wall board when the external wall board is generally designed, the cavity of the external wall board often has rainwater and condensate water deposition, and the use safety of the external wall board and even the whole building is seriously affected, so that the drainage of the cavity part of the external wall board is very important for the safe use of the building.
To solve the above-mentioned problems, the chinese patent application publication No. CN106013474B discloses a drainage structure for an external wall panel of an assembled building, which comprises a drain pipe installed at the lowest of the vertical joints of the external wall panel and horizontally placed, wherein the drain pipe and the external wall panel form a whole, the drain pipe comprises a pipe seat surrounding a water collecting tank between the vertical joints of the external wall panel and a pipe column protruding axially towards the pipe seat and communicated with the pipe seat, the pipe column exposes out of the outer surface of the external wall panel, and a one-way valve is arranged in the pipe column.
Although the water in the cavity of the external wall panel can be discharged, the structure can not thoroughly discharge the water in the cavity of the external wall panel due to a certain height difference between the pipe column and the pipe seat, so that the external wall panel is in a moist environment for a long time, and the structural safety of the external wall panel of the assembled building is greatly influenced. In addition, the water collecting tank is arranged at the pipe seat, rainwater flows into the water collecting tank along the cavity of the external wall panel, and only after the rainwater reaches a certain degree, the rainwater can push the pipe tongue of the drain pipe through the water pressure generated by the dead weight to the pipe tongue of the drain pipe, so that the rainwater is discharged, namely, the drainage structure of the patent can only discharge the rainwater in the cavity of the external wall panel after the rainwater in the cavity of the external wall panel is accumulated to a certain degree (the rainwater in the cavity of the external wall panel cannot be discharged in time), and the rainwater can still enable the external wall panel to be in a humid environment for a long time, so that the safe use of a building is affected.
Disclosure of Invention
The invention aims to provide an assembled building external wall board drainage structure which can thoroughly and timely drain rainwater in a cavity of an external wall board.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the water drainage structure of the external wallboard of the assembled building comprises a water drainage box arranged below the cavity of the external wallboard, a water inlet is formed in the top of the water drainage box, and a water outlet is formed in the side face of the water drainage box; the drainage box is internally sealed and vertically connected with a horizontal partition plate in a sliding manner, the horizontal partition plate is fixedly connected with the top of the drainage box through a tension spring, and in a natural state, the horizontal partition plate is positioned above the drainage outlet; the air guide pipe is provided with a first vent hole, and a first one-way valve is arranged on the first vent hole; the horizontal partition plate is provided with a plunger which is sealed and vertically connected in a sliding manner in the first vent hole, a second vent hole with a T-shaped longitudinal section is formed in the plunger, and a second one-way valve is arranged on the second vent hole; the air duct is also provided with an auxiliary air duct used for communicating the first vent hole and the second vent hole, the first one-way valve and the second one-way valve can enable gas in the cavity of the externally hung wallboard to sequentially pass through the first vent hole, the auxiliary air duct and the second vent hole, or the first one-way valve and the second one-way valve can enable external gas to sequentially pass through the second vent hole, the auxiliary air duct and the second vent hole; the device also comprises a power mechanism which can drive the horizontal separation plate to move vertically and downwards intermittently.
The working principle and the beneficial effects of the technical scheme are as follows:
when water is deposited in the cavity of the external wall panel, water can rapidly enter the upper part of the horizontal partition plate of the drainage box from the gap between the air duct and the water inlet, the horizontal partition plate gradually moves vertically downwards along with more accumulated water on the horizontal partition plate, and when the horizontal partition plate vertically moves downwards to the lower part of the drainage outlet, water is drained from the drainage outlet, namely, the drainage structure can rapidly drain accumulated water in the cavity of the external wall panel.
After the accumulated water is discharged, a power mechanism is started, the power mechanism drives the horizontal separation plate to intermittently and vertically move downwards, at the moment, under the action of the first one-way valve and the second one-way valve, the water draining structure has two gas flowing modes, and the specific flowing modes are as follows: (1) extracting gas in the cavity of the externally hung wallboard: when the horizontal partition plate vertically moves downwards, the plunger gradually slides out from the bottom of the first vent hole, and gas in the cavity of the external wall panel sequentially enters the first vent hole of the gas guide pipe, the auxiliary gas pipe of the gas guide pipe and the second vent hole of the plunger; when the horizontal partition plate moves vertically upward, the gas is discharged from the bottom of the second vent hole. (2) Introducing external gas into the cavity of the external wallboard: when the horizontal separation plate moves vertically downwards, the plunger gradually slides out from the bottom of the first vent hole, external air sequentially enters the second vent hole of the plunger, the auxiliary air pipe of the air pipe and the first vent hole of the air pipe, and when the horizontal separation plate moves vertically upwards, the air enters the cavity of the external wall plate from the top of the first vent hole.
Under the effect of first check valve and second check valve, this drainage structures can promote the air flow in the external wallboard cavity through (1) and (2) two kinds of gas flow modes to make originally moist external wallboard cavity dry rapidly.
Further, the first one-way valve is arranged at the top of the air duct, and the second one-way valve is arranged at the bottom of the plunger, so that the flow of gas can be greatly improved.
Further, the power mechanism comprises an iron attraction embedded at the top of the drainage tank and an electromagnet embedded in the horizontal partition plate, and the magnetic poles of the electromagnet after being electrified are the same as those of one side of the iron attraction. The electromagnet is intermittently electrified, so that intermittent vertical downward movement of the horizontal partition plate can be simply realized.
Further, the number of the air ducts is even, and the number of the air ducts along the direction of the first ventilation holes, the auxiliary air ducts and the second ventilation holes is equal to the number of the air ducts along the direction of the second ventilation holes, the auxiliary air ducts and the first ventilation holes. According to the technical scheme, the gas quantity extracted from the cavity of the external wall panel=the gas quantity of the external gas led into the cavity of the external wall panel can be realized, and the gas flow in the cavity of the external wall panel can be accelerated to the greatest extent through the arrangement.
Further, a first one-way valve on the air guide pipe which flows along the direction of the first vent hole, the auxiliary air pipe and the second vent hole is a one-way air inlet valve, and a second one-way valve is a one-way air outlet valve which only contains air and is discharged from the plunger; the first one-way valve on the air guide pipe along the direction of the second ventilation hole, the auxiliary air pipe and the first ventilation hole is a one-way air outlet valve, and the second one-way valve is a one-way air inlet valve which only allows air to enter the plunger, so that the air flow in the cavity of the external wall panel and the air flow in the cavity of the external wall panel can be realized relatively simply.
Drawings
FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention;
fig. 2 is a partial enlarged view at a in fig. 1.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the wall plate comprises an externally hung wall plate cavity 1, a drain tank 2, a water inlet 21, a drain outlet 22, a horizontal partition plate 3, a tension spring 31, a plunger 32, a second ventilation hole 33, a second one-way valve 34, an air duct 4, a first ventilation hole 41, a first one-way valve 42, a magnet 51 and an electromagnet 52.
As shown in fig. 1 and 2: the drainage structure of the external wallboard of the assembled building comprises a drainage box 2 arranged below a cavity 1 of the external wallboard, a plurality of water inlets 21 are formed in the top of the drainage box 2, and a water outlet 22 is formed in the side surface of the drainage box 2; the inside of the drainage tank 2 is sealed and vertically connected with a horizontal separation plate 3 in a sliding manner, the horizontal separation plate 3 is fixedly connected with the top of the drainage tank 2 through a tension spring 31 by bolts, and in a natural state, the horizontal separation plate 3 is positioned above the drainage port 22.
Still include the air duct 4 that the top stretches out from water inlet 21 department (the air duct passes through bolt fixed connection at the top of drain tank 2), leave the clearance between air duct 4 and the water inlet 21, open in the air duct 4 has first air vent 41, is equipped with first check valve 42 on the first air vent 41 (first check valve 42 is in the top of air duct 4). The horizontal partition plate 3 is provided with a plunger 32, the plunger 32 is sealed and vertically connected in a sliding manner in the first vent hole 41, a second vent hole 33 with a T-shaped longitudinal section is formed in the plunger 32, and a second one-way valve 34 is arranged on the second vent hole 33 (the second one-way valve 34 is positioned at the bottom of the plunger 32); the air duct 4 is also provided with an auxiliary air duct for communicating the first vent hole 41 and the second vent hole 33; and a power mechanism capable of driving the horizontal separation plate 3 to intermittently vertically move downwards.
The power mechanism comprises a magnet 51 embedded at the top of the drainage tank 2 and an electromagnet 52 embedded in the horizontal partition plate 3, and the magnetic poles of the electromagnet 52 after being electrified are the same as those of the side opposite to the magnet 51.
The number of air ducts 4 is even, and in this embodiment, the number of air ducts 4 is preferably four, and divided into two groups, namely, group c and group d in fig. 1. Wherein the first one-way valve 42 on the air duct 4 of group c is a one-way air inlet valve, the second one-way valve 34 is a one-way air outlet valve which only contains air discharged from the plunger 32, and the air flow direction of group c is b (first air vent 41 → auxiliary air duct → second air vent 33). The first check valve 42 on the d group of air guide pipes 4 is a check air outlet valve, the second check valve 34 is a check air inlet valve which only contains air entering the plunger 32, and the flow direction of the d group of air is opposite to that of the b (along the second air vent hole 33 → the auxiliary air pipe → the first air vent 41).
The specific implementation process is as follows:
when water is deposited in the external wall plate cavity 1, water can rapidly enter the upper part of the horizontal partition plate 3 of the drainage box 2 from a gap (a as shown in fig. 1) between the air duct 4 and the water inlet 21, the horizontal partition plate 3 gradually moves vertically downwards along with more accumulated water on the horizontal partition plate 3, and when the horizontal partition plate 3 moves vertically downwards to the lower part of the drainage outlet 22, water is discharged from the drainage outlet 22, namely, the drainage structure can rapidly discharge accumulated water in the external wall plate cavity 1.
After the accumulated water is discharged (the accumulated water can be discharged), the electromagnet 52 is electrified, and the electromagnet 52 and the iron-absorbing 51 after the electrification repel each other, so that the horizontal partition plate 3 is driven to move intermittently and vertically downwards, and at the moment, under the action of the first one-way valve 42 and the second one-way valve 34, the c group can extract the gas in the cavity 1 of the external wall panel: when the horizontal partition plate 3 moves vertically downwards, the plunger 32 gradually slides out from the bottom of the first vent hole 41, and gas in the cavity 1 of the externally hung wallboard sequentially enters the first vent hole 41 of the gas guide pipe 4, the auxiliary gas pipe of the gas guide pipe 4 and the second vent hole 33 of the plunger 32; when the horizontal partition plate 3 moves vertically upward, the gas is discharged from the bottom of the second vent hole 33. d group can introduce external gas into the cavity 1 of the externally hung wallboard: when the horizontal partition plate 3 moves vertically downwards, the plunger 32 gradually slides out from the bottom of the first vent hole 41, and external air sequentially enters the second vent hole 33 of the plunger 32, the auxiliary air pipe of the air pipe 4, and the first vent hole 41 of the air pipe 4, and when the horizontal partition plate 3 moves vertically upwards, the air enters the cavity 1 of the external wall plate from the top of the first vent hole 41.
Under the action of the first check valve 42 and the second check valve 34, the drainage structure promotes the air flow in the cavity 1 of the external wall panel through two gas flow modes of the group c and the group d, so that the original wet cavity 1 of the external wall panel is quickly dried (after drying, the electromagnet 52 is powered off).
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (5)
1. The water draining structure of the external wall panel of the assembled building is characterized by comprising a water draining box arranged below a cavity of the external wall panel, wherein the top of the water draining box is provided with a plurality of water inlets, and the side surface of the water draining box is provided with a water draining hole; the drainage box is internally sealed and vertically connected with a horizontal partition plate in a sliding manner, the horizontal partition plate is fixedly connected with the top of the drainage box through a tension spring, and in a natural state, the horizontal partition plate is positioned above the drainage outlet; the air guide pipe is provided with a first vent hole, and a first one-way valve is arranged on the first vent hole; the horizontal partition plate is provided with a plunger which is sealed and vertically connected in a sliding manner in the first vent hole, a second vent hole with a T-shaped longitudinal section is formed in the plunger, and a second one-way valve is arranged on the second vent hole; the air duct is also provided with an auxiliary air duct which is used for communicating the first vent hole and the second vent hole; the device also comprises a power mechanism which can drive the horizontal separation plate to move vertically and downwards intermittently.
2. The fabricated building external wall panel drainage structure of claim 1, wherein the first one-way valve is at the top of the air duct and the second one-way valve is at the bottom of the plunger.
3. The water drainage structure of the externally hung wallboard of the fabricated building according to claim 2, wherein the power mechanism comprises an iron attraction embedded at the top of the water drainage box and an electromagnet embedded in the horizontal partition plate, and the magnetic poles of the electromagnet after being electrified are the same as those of one side of the iron attraction.
4. The drainage structure of the external wall panel of the fabricated building according to claim 3, wherein the number of the air ducts is even, and the number of the air ducts along the direction of the first ventilation hole, the auxiliary air duct and the second ventilation hole is equal to the number of the air ducts along the direction of the second ventilation hole, the auxiliary air duct and the first ventilation hole.
5. The water drainage structure of the external wall panel of the fabricated building according to claim 4, wherein the first one-way valve on the air guide pipe which flows along the direction of the first air vent, the auxiliary air pipe and the second air vent is a one-way air inlet valve, and the second one-way valve is a one-way air outlet valve which only contains air and is discharged from the plunger; the first one-way valve on the air guide pipe along the direction of the second ventilation hole, the auxiliary air pipe and the first ventilation hole is a one-way air outlet valve, and the second one-way valve is a one-way air inlet valve which only allows air to enter the plunger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414451.2A CN110042937B (en) | 2019-05-17 | 2019-05-17 | Drainage structure of externally hung wallboard of assembled building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910414451.2A CN110042937B (en) | 2019-05-17 | 2019-05-17 | Drainage structure of externally hung wallboard of assembled building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110042937A CN110042937A (en) | 2019-07-23 |
| CN110042937B true CN110042937B (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910414451.2A Active CN110042937B (en) | 2019-05-17 | 2019-05-17 | Drainage structure of externally hung wallboard of assembled building |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980183A (en) * | 2020-07-24 | 2020-11-24 | 王小艳 | Assembled building externally-hung wallboard drainage device |
| CN111926943B (en) * | 2020-08-13 | 2021-05-25 | 江苏苏阳建设有限公司 | Assembled building externally-hung wallboard drainage structures |
| CN112854591B (en) * | 2020-12-31 | 2022-04-26 | 山东基尚新型建材股份有限公司 | Green wallboard for building |
| CN114541599B (en) * | 2022-02-21 | 2023-06-27 | 山东联海建筑科技股份有限公司 | Drainage structure of externally hung wallboard of assembled building |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10325185A (en) * | 1997-03-25 | 1998-12-08 | Inax Corp | Draining structure at lower end of exterior wall panel |
| CN109025052A (en) * | 2018-07-16 | 2018-12-18 | 重庆工程职业技术学院 | A kind of assembled architecture outer wall plate discharge structure |
| CN109653383A (en) * | 2018-12-28 | 2019-04-19 | 无锡市城归设计有限责任公司 | A kind of assembled architecture out-hung panel discharge structure |
| CN109680781A (en) * | 2018-12-29 | 2019-04-26 | 重庆工程职业技术学院 | Assembled architecture out-hung panel discharge structure |
| CN210105003U (en) * | 2019-05-17 | 2020-02-21 | 河南太岳建筑工程有限公司 | Assembled building external wall panel drainage structures |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6620040B2 (en) * | 2002-01-04 | 2003-09-16 | Daniel F. Rehbein | Moisture venting structure for the construction of walls |
-
2019
- 2019-05-17 CN CN201910414451.2A patent/CN110042937B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10325185A (en) * | 1997-03-25 | 1998-12-08 | Inax Corp | Draining structure at lower end of exterior wall panel |
| CN109025052A (en) * | 2018-07-16 | 2018-12-18 | 重庆工程职业技术学院 | A kind of assembled architecture outer wall plate discharge structure |
| CN109653383A (en) * | 2018-12-28 | 2019-04-19 | 无锡市城归设计有限责任公司 | A kind of assembled architecture out-hung panel discharge structure |
| CN109680781A (en) * | 2018-12-29 | 2019-04-26 | 重庆工程职业技术学院 | Assembled architecture out-hung panel discharge structure |
| CN210105003U (en) * | 2019-05-17 | 2020-02-21 | 河南太岳建筑工程有限公司 | Assembled building external wall panel drainage structures |
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| CN110042937A (en) | 2019-07-23 |
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