CN113057107A - Assembled precast concrete excrement groove - Google Patents
Assembled precast concrete excrement groove Download PDFInfo
- Publication number
- CN113057107A CN113057107A CN202110318197.3A CN202110318197A CN113057107A CN 113057107 A CN113057107 A CN 113057107A CN 202110318197 A CN202110318197 A CN 202110318197A CN 113057107 A CN113057107 A CN 113057107A
- Authority
- CN
- China
- Prior art keywords
- precast concrete
- manure
- excrement
- collecting groove
- leaking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000011178 precast concrete Substances 0.000 title claims abstract description 85
- 210000003608 fece Anatomy 0.000 claims abstract description 78
- 239000010871 livestock manure Substances 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000009417 prefabrication Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 24
- 238000009434 installation Methods 0.000 abstract description 7
- 230000003487 anti-permeability effect Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000009415 formwork Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/01—Removal of dung or urine, e.g. from stables
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K1/00—Housing animals; Equipment therefor
- A01K1/015—Floor coverings, e.g. bedding-down sheets ; Stable floors
- A01K1/0151—Grids; Gratings; Slatted floors
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses an assembled precast concrete manure pit, and belongs to the field of buildings. The system comprises a plurality of precast concrete manure collecting groove units, supporting beams, manure leaking plates and walkway plates which are precast by factories; the precast concrete excrement collecting groove units are arranged on the supporting beam, a plurality of precast concrete excrement collecting groove units are sequentially connected to form an excrement collecting groove, and the excrement leaking plate and the walkway plate cover form a closed structure on the excrement collecting groove; the upper part of the precast concrete excrement collecting groove unit is provided with a U-shaped groove, the precast concrete excrement collecting groove unit is placed on the supporting beam, and the supporting beam is connected with the precast concrete excrement collecting groove unit through a connecting piece; the excrement leaking plate is provided with excrement leaking holes. The invention has the advantages of high bearing capacity, good anti-permeability effect, low cost, convenient transportation and installation of each part, convenient construction, short construction period, good sealing performance, timely and effective cleaning of the pig manure groove and suitability for later maintenance and replacement, and can meet the requirements of modern multi-story high-rise pig farms, realize full-prefabricated and full-assembled dry construction.
Description
Technical Field
The invention relates to the field of buildings, in particular to an assembled precast concrete manure pit.
Background
With the rapid development of animal husbandry, the pig industry has been developing from traditional small-scale open-air livestock farming to large-scale industrial farming. The pig house is also transiting from small-scale open-air livestock farms to large-scale modern fabricated pig houses, and is a multi-high-rise pig house.
The manure pit is an important component of the pigsty, and the conventional manure pit is generally a brick manure pit or a cast-in-place concrete manure pit. The brick-built manure pit uses a traditional brick-built structure to realize the structural form of the manure pit. The side plate of the brick-laid manure trough has large thickness and low bearing capacity, and is easy to crack and leak; the field construction operation is more, the pollution is serious, and the construction efficiency is low. The cast-in-place concrete dung trough is obtained by respectively erecting a formwork on the bottom plate and the side plate. The traditional cast-in-place concrete septic tank needs on-site formwork erecting, formwork removing and concrete pouring, and has the disadvantages of multiple construction operations, complex and various working procedures, long construction period and serious pollution; the joints of the side plates and the floor slab form construction joints, and leakage is easy to occur.
With the increasing scale of pig industry and the assembly development of pig houses, the existing brick manure groove or cast-in-place concrete manure groove cannot adapt to the modern pig houses.
Disclosure of Invention
The invention provides an assembled precast concrete dung trough which has the advantages of high bearing capacity, good anti-permeability effect, low cost, convenient transportation and installation of all parts, convenient construction, short construction period, good sealing performance, timely and effective cleaning of the pig dung trough and suitability for later maintenance and replacement, and can meet the requirements of modern multi-high-rise pig farms, realize full prefabrication and full assembled dry construction, and the assembled precast concrete dung trough is high in bearing capacity, good in anti-permeability effect, low in cost and convenient to transport and install.
The technical scheme provided by the invention is as follows:
an assembled precast concrete dung trough, includes a plurality of precast concrete dung collection trough units, a supporting beam, a dung leakage plate and a walkway plate prefabricated by a factory, wherein:
the precast concrete excrement collecting groove units are arranged on the supporting beam, a plurality of precast concrete excrement collecting groove units are sequentially connected to form an excrement collecting groove, and the excrement leaking plate and the walkway plate cover form a closed structure on the excrement collecting groove;
the upper part of the precast concrete excrement collecting groove unit is provided with a U-shaped groove, the precast concrete excrement collecting groove unit is placed on the supporting beam, and the top surface of the supporting beam is connected with two side surfaces of the precast concrete excrement collecting groove unit through a connecting piece;
and the excrement leaking plate is provided with excrement leaking holes.
Furthermore, the connecting piece is an L-shaped connecting piece, one edge of the L-shaped connecting piece is welded with the supporting beam or connected with the supporting beam through a bolt, and the other edge of the L-shaped connecting piece is connected with the precast concrete manure collecting groove unit through a bolt.
Furthermore, each connecting node of the supporting beam and the precast concrete manure collecting groove unit comprises two L-shaped connecting pieces, and the two L-shaped connecting pieces are used for respectively connecting the outer walls of the two side surfaces of the precast concrete manure collecting groove unit with the top surface of the supporting beam.
Furthermore, all or part of bolt holes in the L-shaped connecting piece are transverse long holes, inner wire sleeves are embedded in two side faces of the precast concrete excrement collecting groove unit, and stiffening ribs are arranged on the L-shaped connecting piece.
Furthermore, jacking supports are arranged at the tops of two side faces of the precast concrete excrement collecting groove unit, and lifting points are arranged on four top angles of the precast concrete excrement collecting groove unit.
Furthermore, the bottom surface of the manure collecting groove has a certain gradient along the length direction, and the gradient of the bottom surface of the manure collecting groove inclines from the middle of the pigsty to two ends or from one end to the other end.
Furthermore, the top parts of the two ends of the precast concrete excrement collecting groove units are provided with end connecting plates which connect the two side surfaces of the precast concrete excrement collecting groove units together, the end parts of the two adjacent precast concrete excrement collecting groove units are connected, and the joints are sealed by sealing glue.
Further, leak dropping board and walkway board leak dropping integrated board for integrated into one piece, leak dropping walkway integrated board includes leaking the excrement section and walkway section, leak dropping hole sets up on leaking the excrement section, inside lightening hole that is provided with of walkway section.
The invention has the following beneficial effects:
the precast concrete excrement collecting groove unit is a standardized component, has high bearing capacity, is convenient to transport and install, is convenient to construct, and has good anti-permeability effect and low cost. The precast concrete excrement collecting groove unit, the excrement leaking plate and the walkway plate form a closed whole through connection, the sealing performance of a flushing part is guaranteed, the waterproof performance is excellent, and the condition that the urine and excrement splashing part pollutes the sanitation of a field area is effectively prevented. The invention has convenient installation, does not need to support templates, scaffolds and the like in the construction process, has short construction period, high efficiency, short construction period and guaranteed quality, realizes the full-factory prefabrication and full-assembly dry construction, is particularly suitable for multi-high large-scale pig farms, has long service life, is convenient and quick for later maintenance and replacement, and reduces the cost.
Drawings
FIG. 1 is a schematic structural view of a precast concrete manure collecting tank unit according to the present invention;
FIG. 2 is a schematic end view of the fabricated precast concrete manure pit of the present invention;
FIG. 3 is a schematic side view of the fabricated precast concrete manure pit of the present invention;
FIG. 4 is a top view of an integrated plate of the excreta leaking walkway;
FIG. 5 is a sectional view of the integrated plate of the excreta leaking passage in the direction of 1-1;
fig. 6 is a sectional view of the integrated plate of the excreta leaking passage in the direction of 2-2.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the present invention provides an assembled precast concrete manure pit, as shown in fig. 1 to 6, including a plurality of precast concrete manure collecting pit units 100, supporting beams 200, manure leaking plates 300, and walkway plates 400, which are precast by a factory, wherein:
the precast concrete manure collecting tank units 100 are installed on the support beam 200, and a plurality of precast concrete manure collecting tank units 100 are sequentially connected to form a manure collecting tank 500, and the manure leaking plate 300 and the walkway plate 400 are covered on the manure collecting tank 500 to form a closed structure.
The upper part of the precast concrete manure collecting tank unit 100 is provided with a U-shaped groove 101, the precast concrete manure collecting tank unit 100 is placed on the support beam 200, and the top surface of the support beam 200 is connected with both side surfaces 107 of the precast concrete manure collecting tank unit 100 by a connecting member 600.
The excrement leaking plate 300 is provided with excrement leaking holes 301, excrement of pigs can enter the excrement collecting groove, and the walkway plate is used for human activities and pig transition.
The structures of the precast concrete excrement collecting groove unit, the supporting beam, the excrement leaking plate, the walkway plate and the like are all manufactured by an assembly type modular factory, and necessary parts of various structures can be coated with anticorrosive materials and then are transported to a construction site for splicing and installation. During installation, a supporting beam prefabricated in a factory is installed and positioned, the precast concrete excrement collecting groove units are hoisted and positioned and are fixedly connected to the supporting beam through connecting pieces, the plurality of precast concrete excrement collecting groove units form the excrement collecting groove, and the prefabricated excrement leaking plate and the prefabricated walkway plate are laid on the excrement collecting groove in a flatwise mode to form a closed structure, so that the quality is guaranteed, and the force transmission path is clear. Finally, coating the sealant on the required places.
The precast concrete excrement collecting groove unit is a standardized component, has high bearing capacity, is convenient to transport and install, is convenient to construct, and has good anti-permeability effect and low cost. The precast concrete excrement collecting groove unit, the excrement leaking plate and the walkway plate form a closed whole through connection, the sealing performance of a flushing part is guaranteed, the waterproof performance is excellent, and the condition that the urine and excrement splashing part pollutes the sanitation of a field area is effectively prevented. The invention has convenient installation, does not need to support templates, scaffolds and the like in the construction process, has short construction period, high efficiency, short construction period and guaranteed quality, realizes the full-factory prefabrication and full-assembly dry construction, is particularly suitable for multi-high large-scale pig farms, has long service life, is convenient and quick for later maintenance and replacement, and reduces the cost.
The invention is not limited to the specific structure of the connecting member, and in one implementation, as shown in fig. 2 and 3, the connecting member 600 is an L-shaped connecting member, one side of the L-shaped connecting member 600 is welded or connected with the supporting beam 200 through a bolt 601, and the other side is connected with the precast concrete manure collecting trough unit 100 through a bolt 602.
Wherein, each connecting node of the supporting beam 200 and the precast concrete manure collecting tank unit 100 comprises two L-shaped connecting members, and the two L-shaped connecting members respectively connect the two side outer walls of the precast concrete manure collecting tank unit 100 with the top surface of the supporting beam 200.
All or part of the bolt holes in the L-shaped connecting piece are transverse long holes, and the arrangement of the long holes can reduce the shearing force generated when the precast concrete excrement collecting groove unit is subjected to the impact force of water flow, so that the safety of the structure is ensured. The two sides of the precast concrete excrement collecting groove unit 100 are pre-embedded with the inner wire sleeves 102, which are used for connecting the L-shaped connecting piece with the precast concrete excrement collecting groove unit and the supporting beam together by using bolts, and can avoid the occurrence of holes in the excrement collecting groove, and the precast concrete excrement collecting groove unit is smooth and has no holes, so that the deposition of excrement is prevented.
The L-shaped connecting piece is provided with a stiffening rib 603 for improving the strength of the L-shaped connecting piece.
The precast concrete excrement collecting groove unit is connected with the supporting beam through the bolts, so that holes in the excrement collecting groove are avoided, the integrity is good, the operation is simple, the construction is convenient, and the manufacturing cost is saved. The bolts 601 connected with the support beams are chemical bolts, and the bolts 602 connected with the manure collecting tank unit are high-strength bolts.
In one example, the L-shaped connecting piece is L-shaped steel which is convenient to obtain and simple to process.
The top parts of two sides of the precast concrete excrement collecting groove unit 100 are provided with jacking supports 103, which are convenient for bearing excrement leaking plates and walkway plates. The four top corners of the precast concrete manure collecting tank unit 100 are provided with lifting points 104, which facilitate lifting.
In order to prevent the feces from silting, the precast concrete feces collection tank unit needs to be provided with a certain gradient along the length direction when being manufactured in a factory, and the optional range of the gradient is 1% -2%. After the precast concrete excrement collecting tank unit is assembled into the excrement collecting tank, the bottom surface of the excrement collecting tank 500 has a certain gradient along the length direction, the gradient of the bottom surface of the excrement collecting tank 500 inclines from the middle of a pig house to two ends, a flushing pipeline is arranged in the middle of the pig house plant, and water flows from the middle to the two ends, so that the height difference of the bottom surface of the precast concrete excrement collecting tank unit can be reduced, and materials are saved. Or the slope of the bottom surface of the manure collecting tank 500 is inclined from one end to the other end, and water is flushed from one end to the other end.
The top parts of the two ends of the precast concrete excrement collecting groove unit 100 are provided with end connecting plates 105 which connect the two side surfaces of the precast concrete excrement collecting groove unit 100 together, and the end connecting plates are used for supporting the two side surfaces, so that the lower part of the precast concrete excrement collecting groove unit, caused by inward displacement of the side plates during hoisting, can be prevented from cracking. The end parts of two adjacent precast concrete manure collecting groove units 100 are connected, and the joint is sealed by sealant 106.
As shown in fig. 4-6, the excrement leaking plate 300 and the walkway plate 400 are integrally formed as an integrated excrement leaking walkway plate 700, the integrated excrement leaking walkway plate 700 includes an excrement leaking section 701 and a walkway section 702, the excrement leaking hole 301 is opened on the excrement leaking section 701, and a hollow lightening hole 703 is arranged inside the walkway section 702.
The integrated excrement leaking walkway integrated plate is manufactured by adopting an integrated module and assembled on site, and the integrated excrement leaking walkway board can be designed according to engineering drawings and can adopt different specifications of single-span integrated type or multi-span integrated type. The thickness of the integrated excrement leaking walkway integrated plate is not smaller than 70mm, hollow lightening holes are formed in the integrated excrement leaking walkway integrated plate, the self weight is small, the integrated excrement leaking walkway integrated plate is directly hoisted and fixed, the construction is simple and convenient, the construction time can be greatly shortened, the labor is saved, and the assembly type construction and installation are realized.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides an assembled precast concrete dung groove which characterized in that includes a plurality of precast concrete collection dung groove unit, a supporting beam, leaks dropping board and pavement board by factory prefabrication, wherein:
the precast concrete excrement collecting groove units are arranged on the supporting beam, a plurality of precast concrete excrement collecting groove units are sequentially connected to form an excrement collecting groove, and the excrement leaking plate and the walkway plate cover form a closed structure on the excrement collecting groove;
the upper part of the precast concrete excrement collecting groove unit is provided with a U-shaped groove, the precast concrete excrement collecting groove unit is placed on the supporting beam, and the top surface of the supporting beam is connected with two side surfaces of the precast concrete excrement collecting groove unit through a connecting piece;
and the excrement leaking plate is provided with excrement leaking holes.
2. The fabricated precast concrete manure pit according to claim 1, wherein the connecting member is an L-shaped connecting member, one side of which is welded or bolted to the support beam, and the other side of which is bolted to the precast concrete manure collecting pit unit.
3. The fabricated precast concrete manure pit according to claim 2, wherein each connection node of the support beam with the precast concrete manure collecting pit unit comprises two L-shaped connectors, which respectively connect both side outer walls of the precast concrete manure collecting pit unit with the top surface of the support beam.
4. The fabricated precast concrete manure pit as claimed in claim 3, wherein all or part of the bolt holes on the L-shaped connecting members are transverse long holes, inner wire sleeves are embedded in two side surfaces of the precast concrete manure collecting pit unit, and stiffening ribs are arranged on the L-shaped connecting members.
5. The fabricated precast concrete manure pit as claimed in any one of claims 1 to 4, wherein jacking brackets are provided at the tops of both sides of the precast concrete manure collecting pit unit, and lifting points are provided at four top corners of the precast concrete manure collecting pit unit.
6. The fabricated precast concrete manure channel of claim 5, wherein the bottom surface of the manure collecting channel has a slope in a length direction, and the slope of the bottom surface of the manure collecting channel is inclined from the middle of the pigsty to both ends or from one end to the other end.
7. The fabricated precast concrete manure collection tank of claim 5, wherein end connection plates for connecting two side surfaces of the precast concrete manure collection tank unit are arranged at the tops of two ends of the precast concrete manure collection tank unit, the end parts of two adjacent precast concrete manure collection tank units are connected, and the joints are sealed by sealing glue.
8. The fabricated precast concrete manure pit as claimed in claim 5, wherein the manure leaking plate and the walkway plate are integrally formed as a manure leaking walkway integrated plate, the manure leaking walkway integrated plate comprises a manure leaking section and a walkway section, the manure leaking holes are formed in the manure leaking section, and lightening holes are formed in the walkway section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318197.3A CN113057107A (en) | 2021-03-25 | 2021-03-25 | Assembled precast concrete excrement groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110318197.3A CN113057107A (en) | 2021-03-25 | 2021-03-25 | Assembled precast concrete excrement groove |
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| Publication Number | Publication Date |
|---|---|
| CN113057107A true CN113057107A (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110318197.3A Pending CN113057107A (en) | 2021-03-25 | 2021-03-25 | Assembled precast concrete excrement groove |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3833454C1 (en) * | 1988-10-01 | 1990-01-25 | Friedhelm 4130 Moers De Bongards | Liquid-manure channel |
| KR100977092B1 (en) * | 2009-11-24 | 2010-08-19 | 주식회사 세영 | Prefabricated septic tank |
| CN107950428A (en) * | 2017-11-17 | 2018-04-24 | 陕西新智汇科技股份有限公司 | A kind of solid-liquid separating poultry colony house |
| CN109329079A (en) * | 2018-11-19 | 2019-02-15 | 郑州大智农牧科技有限公司 | A kind of modularization thermal insulation energy conservation pig house building system |
| CN208950069U (en) * | 2018-09-17 | 2019-06-07 | 辽宁科技大学 | A kind of light-duty prefabricated buildings |
| CN110089435A (en) * | 2019-06-10 | 2019-08-06 | 鄢烈虓 | A kind of leakage of assembled zero farm |
| CN110741944A (en) * | 2019-12-02 | 2020-02-04 | 湖南诚友绿色建材科技有限公司 | Prestressed self-compacting concrete hollow excrement leaking plate |
| CN210671638U (en) * | 2019-09-17 | 2020-06-05 | 赵利 | Manure leaking plate structure for livestock breeding |
| CN111677094A (en) * | 2020-07-06 | 2020-09-18 | 黑龙江省牧川装配式建筑有限公司 | Prefabricated pig house excrement ditch of assembled prestressed concrete |
-
2021
- 2021-03-25 CN CN202110318197.3A patent/CN113057107A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3833454C1 (en) * | 1988-10-01 | 1990-01-25 | Friedhelm 4130 Moers De Bongards | Liquid-manure channel |
| KR100977092B1 (en) * | 2009-11-24 | 2010-08-19 | 주식회사 세영 | Prefabricated septic tank |
| CN107950428A (en) * | 2017-11-17 | 2018-04-24 | 陕西新智汇科技股份有限公司 | A kind of solid-liquid separating poultry colony house |
| CN208950069U (en) * | 2018-09-17 | 2019-06-07 | 辽宁科技大学 | A kind of light-duty prefabricated buildings |
| CN109329079A (en) * | 2018-11-19 | 2019-02-15 | 郑州大智农牧科技有限公司 | A kind of modularization thermal insulation energy conservation pig house building system |
| CN110089435A (en) * | 2019-06-10 | 2019-08-06 | 鄢烈虓 | A kind of leakage of assembled zero farm |
| CN210671638U (en) * | 2019-09-17 | 2020-06-05 | 赵利 | Manure leaking plate structure for livestock breeding |
| CN110741944A (en) * | 2019-12-02 | 2020-02-04 | 湖南诚友绿色建材科技有限公司 | Prestressed self-compacting concrete hollow excrement leaking plate |
| CN111677094A (en) * | 2020-07-06 | 2020-09-18 | 黑龙江省牧川装配式建筑有限公司 | Prefabricated pig house excrement ditch of assembled prestressed concrete |
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Application publication date: 20210702 |
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