CN108465546B - Quicksand type sand washing method and equipment - Google Patents
Quicksand type sand washing method and equipment Download PDFInfo
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- CN108465546B CN108465546B CN201810337500.2A CN201810337500A CN108465546B CN 108465546 B CN108465546 B CN 108465546B CN 201810337500 A CN201810337500 A CN 201810337500A CN 108465546 B CN108465546 B CN 108465546B
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- hexagonal
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- sand
- bean
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- 239000004576 sand Substances 0.000 title claims abstract description 83
- 238000005406 washing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 15
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims abstract description 91
- 244000046052 Phaseolus vulgaris Species 0.000 claims abstract description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000003860 storage Methods 0.000 claims abstract description 39
- 229920002472 Starch Polymers 0.000 claims abstract description 31
- 235000019698 starch Nutrition 0.000 claims abstract description 31
- 239000008107 starch Substances 0.000 claims abstract description 31
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 238000010926 purge Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 9
- 238000004537 pulping Methods 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 5
- 235000013527 bean curd Nutrition 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010790 dilution Methods 0.000 abstract description 2
- 239000012895 dilution Substances 0.000 abstract description 2
- 244000068988 Glycine max Species 0.000 description 8
- 235000010469 Glycine max Nutrition 0.000 description 8
- 239000010963 304 stainless steel Substances 0.000 description 6
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2230/00—Specific aspects relating to the whole B07B subclass
- B07B2230/01—Wet separation
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Beans For Foods Or Fodder (AREA)
Abstract
The invention discloses a quicksand type sand washing method and equipment, which comprise a pulp grinder, a sand washing tank, a first group of hexagonal sieves, a first storage tank, a second group of hexagonal sieves, a third group of hexagonal sieves, a second storage tank and a sand press. The sand washing machine can wash sand in the first step, and is provided with the large-capacity sand washing pool, so that the water adding amount is increased, the dilution effect is better, the sand cannot overflow, and the sand washing machine is convenient for workers to operate; after the water amount is increased, the slurry is fully separated at the beginning through purging, the purging time is not needed, the sweetened bean paste can be screened out at one time, the technical requirement on workers is low, and the control is good; and the sand settling link is not adopted, so that the running-water type operation is formed, the time is saved, and the working efficiency is high; after one-time blow washing and two-time water washing, the starch and the bean gum in the sweetened bean paste are thoroughly washed, the sandy property is purer, and the quality of finished products is better.
Description
Technical Field
The invention relates to the field of bean paste preparation, in particular to a quicksand type sand washing method and equipment.
Background
The preparation of sweetened bean paste from beans must be subjected to a process of washing the paste. The existing sand washing process is that cooked beans are conveyed from a boiling pot or a boiling tank to a pulping machine to be pulped, flow into a storage tank to be diluted by adding water, and then are conveyed to a hexagonal sieve for screening. And (4) enabling the bean paste peeled by the hexagonal sieve to flow into a sand washing pool, and diluting with water. Blowing air by a high-pressure air pump for 5 minutes, precipitating for 15 minutes, fully separating starch from the sweetened bean paste, and then discharging water. After about 5 minutes, the sweetened bean paste is conveyed to a plate and frame press to be dehydrated into dry sand. The problem that the storage tank has small volume, and if the water adding amount is too large, the conveying pump cannot convey the slurry, so that the slurry can overflow the storage tank. If the water adding amount is too small, the slurry has high viscosity, the hexagonal sieve is not permeable, and the sand content of the soybean hulls flowing out is high. The bean paste which is not screened is screened again, and the water adding amount is not controlled well. The sand washing time is long, the starch separation is incomplete, and if better sand formation is required, secondary water adding and washing are carried out for a longer time.
Therefore, an improved quicksand type sand washing method and an improved quicksand type sand washing device are urgently needed to reduce the operation difficulty, improve the sand washing efficiency and improve the sand washing effect.
Disclosure of Invention
The invention aims to provide a quicksand type sand washing method and equipment, which solve the problems of high operation difficulty, low sand washing efficiency and poor sand washing effect of the conventional sand washing method and equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a quicksand type sand washing method,
firstly, conveying cooked beans to a pulping machine through a first conveying pump to be pulped into slurry, and enabling the slurry to flow into a sand washing pool to be diluted by adding water;
secondly, blowing and washing the bean curd skin, the bean gum, the bean paste, the starch and the crude fiber in a sand washing pool by using a high-pressure air pump;
thirdly, slurry in the sand washing tank is conveyed to a first group of hexagonal sieves for screening while grinding and purging, the first group of hexagonal sieves separate bean skins and crude fibers from bean gum, bean paste and starch, the bean skins and the crude fibers flow out of a screen mesh of the first group of hexagonal sieves to a material receiving barrel, and the bean paste containing the starch and the bean gum flows out of a screen mesh of the first group of hexagonal sieves to enter a first storage tank;
fourthly, conveying the bean paste containing the starch and the bean gum in the first storage tank to a second group of hexagonal sieves by using a third conveying pump, and simultaneously preparing a first high-pressure water pump spraying device, wherein only liquid in the second group of hexagonal sieves flows out of meshes of the sieve mesh, so that the starch and the bean gum in the bean paste are fully washed out;
fifthly, the bean paste washed in the fourth step flows into a third group of hexagonal sieves from the second group of hexagonal sieves, the bean paste flowing into the third group of hexagonal sieves is used for completely separating starch and bean gum from the bean paste again by using a second high-pressure water pump spraying device, and the cleaned bean paste without any impurities flows into a second storage tank;
and sixthly, the bean paste in the second storage pool is conveyed into the sand press through a fourth conveying pump without precipitation to be dehydrated into sand.
Further, in the first step, the beans are cooked in a bean cooker or a bean pot.
And in the third step, the first group of hexagonal sieves adopts a sieve mesh with 50-80 meshes to separate materials, and the rotating speed is 20-30 revolutions per minute.
And in the fourth and fifth steps, the second group of hexagonal sieves and the third group of hexagonal sieves adopt screens with 350-450 meshes to separate materials, and the rotating speed is 40-60 r/min.
And in the fourth and fifth steps, the starch and bean gum solution flushed from the second and third groups of hexagonal sieves flows out of the sieve mesh and enters a water storage tank.
A quicksand type sand washing device comprises a pulp grinder, a sand washing tank, a first group of hexagonal sieves, a first storage tank, a second group of hexagonal sieves, a third group of hexagonal sieves, a second storage tank and a sand press; the pulping machine is communicated with the sand washing pool through a first conveying pump, and a high-pressure air pump for blowing air into the sand washing pool is arranged outside the sand washing pool; the sand washing tank is conveyed to the first group of hexagonal sieves through a second conveying pump, substances flowing out of a screen mesh of the first group of hexagonal sieves are led to the first storage tank, the first storage tank is conveyed to the second group of hexagonal sieves through a third conveying pump, and first high-pressure water pump spraying equipment is arranged on the second group of hexagonal sieves; the materials left in the screen mesh of the second group of hexagonal screens are led to the third group of hexagonal screens, and second high-pressure water pump spraying equipment is arranged on the third group of hexagonal screens; and materials remained on the screen mesh of the third group of hexagonal screens are led to the second storage tank, and the second storage tank is conveyed to the sand press through a fourth conveying pump.
Further, the first group of hexagonal sieves adopt a sieve mesh of 50-80 meshes to separate materials, and the rotating speed is 20-30 revolutions per minute.
Furthermore, the second group of hexagonal sieves and the third group of hexagonal sieves adopt screens with 350-450 meshes to separate materials, and the rotating speed is 40-60 r/min.
Compared with the prior art, the invention has the following beneficial technical effects:
the sand washing machine can wash sand in the first step, and is provided with the large-capacity sand washing pool, so that the water adding amount is increased, the dilution effect is better, the sand cannot overflow, and the sand washing machine is convenient for workers to operate; after the water amount is increased, the slurry is fully separated at the beginning through purging, the purging time is not needed, the sweetened bean paste can be screened out at one time, the technical requirement on workers is low, and the control is good; and the sand settling link is not adopted, so that the running-water type operation is formed, the time is saved, and the working efficiency is high; after one-time blow washing and two-time water washing, the starch and the bean gum in the sweetened bean paste are thoroughly washed, the sandy property is purer, and the quality of finished products is better.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic structural view of a quicksand type sand washing apparatus according to the present invention;
description of reference numerals: 1. pulping machine; 2. a sand washing pool; 3. a first set of hexagonal screens; 4. a first storage tank; 5. a second set of hexagonal screens; 6. a third set of hexagonal screens; 7. a second storage tank; 8. a sand press; 9. a first delivery pump; 10. a second delivery pump; 11. a third delivery pump; 12. a first high pressure water pump spray device; 13. a second high-pressure water pump spraying device; 14. a third delivery pump; 15. high-pressure air pump.
Detailed Description
As shown in fig. 1, a concrete embodiment of a quicksand type sand washing device comprises a refiner 1, a sand washing tank 2, a first group of hexagonal sieves 3, a first storage tank 4, a second group of hexagonal sieves 5, a third group of hexagonal sieves 6, a second storage tank 7 and a sand press 8, wherein the refiner 1 is communicated with the sand washing tank 2 through a first delivery pump 9, and a high-pressure air pump 15 for blowing air into the sand washing tank 2 is arranged outside the sand washing tank 2. Wash husky pond 2 and carry to through second delivery pump 10 first group hexagonal sieve 3, the material that flows in the screen cloth of first group hexagonal sieve 3 accesss to first stock chest 4, first group hexagonal sieve adopts 60 mesh 304 stainless steel screen cloth separation materials, and the rotational speed is 23 revolutions per minute, with skin of beancurd, crude fiber and bean gum, sweetened bean paste, starch separation, the sweetened bean paste that contains starch, bean gum flows out into first stock chest from the screen cloth mesh. First storage tank 4 carries through third delivery pump 11 the hexagonal sieve of second group 5 is installed first high pressure water pump on the hexagonal sieve of second group 5 and is spouted equipment 12, the hexagonal sieve of second group adopts 400 mesh 304 stainless steel screen cloth to separate the material, and rotational speed 50 revolutions per minute, and the hexagonal sieve of second group only leaks water and does not leak husky, fully washes out starch, bean gum in the bean paste. The material that the screen cloth of second group hexagonal sieve 5 survives accesss to third group hexagonal sieve 6 is provided with second high pressure water pump spray equipment 13 on the third group hexagonal sieve 6, and the third group hexagonal sieve adopts 400 mesh 304 stainless steel screens to separate the material, and rotational speed 50 revolutions per minute, and third group hexagonal sieve only leaks water and does not leak husky, continues to fully wash out starch, bean gum in the sweetened bean paste. And materials remained on the screen of the third group of hexagonal screens 6 are conveyed to the second storage tank 7, the second storage tank 7 is conveyed to the sand press 8 through a fourth conveying pump 14, and finally the bean paste is made.
The invention relates to a quicksand type sand washing method,
firstly, beans cooked in a bean cooking pot or a bean cooking pot are conveyed to a pulping machine through a first conveying pump to be beaten into slurry, and the slurry flows into a sand washing pool to be diluted by adding water. The sand washing device has the advantages that sand is washed in the first step, the volume of the sand washing pool is increased, the water adding amount is increased, the diluting effect is better, the overflow is avoided, and the sand washing device is convenient for workers to operate.
And secondly, blowing and blowing by using a high-pressure air pump in a sand washing pool to separate the bean curd skin, the bean gum, the bean paste, the starch and the crude fiber. After the water quantity is increased, the slurry is fully separated by blowing and washing, and the sweetened bean paste can be screened out at one time. Has low technical requirements on workers and is easy to master.
And thirdly, grinding the soybean milk while purging, and simultaneously conveying the slurry in the sand washing tank to a first group of hexagonal sieves for screening by using a second conveying pump, wherein the first group of hexagonal sieves adopt a 60-mesh 304 stainless steel sieve net to separate materials, the rotating speed is 23 revolutions per minute, the first group of hexagonal sieves separate the soybean hulls and the crude fibers from the soybean gum, the soybean paste and the starch, the soybean hulls and the crude fibers flow out of a screen mesh of the first group of hexagonal sieves to a material receiving barrel, and the soybean paste containing the starch and the soybean gum flows out of the screen mesh into a first storage tank.
And fourthly, conveying the bean paste containing the starch and the bean gum in the first storage tank to a second group of hexagonal sieves by using a third conveying pump, and simultaneously preparing a first high-pressure water pump spraying device, wherein the second group of hexagonal sieves adopt a 400-mesh 304 stainless steel sieve net to separate materials, the rotating speed is 50 revolutions per minute, the second group of hexagonal sieves only leak water and do not leak the bean paste, and the starch and the bean gum in the bean paste are fully washed out.
And fifthly, the bean paste washed in the fourth step flows into a third group of hexagonal sieves from the second group of hexagonal sieves, and the bean paste flowing into the third group of hexagonal sieves is sprayed with a second high-pressure water pump spraying device to separate starch and bean gum from the bean paste thoroughly. The third group of hexagonal sieves adopts a 304 stainless steel sieve mesh with 400 meshes to separate materials, the rotating speed is 50 r/min, the third group of hexagonal sieves only leaks water and does not leak sand, and starch and bean gum in the bean paste are continuously and fully washed out. The cleaned bean paste without any impurities flows into the second storage tank.
And sixthly, the bean paste in the second storage pool is conveyed into the sand press through a fourth conveying pump without precipitation to be dehydrated into sand. And a sand settling link is not adopted, so that running water type operation is formed, the time is saved, and the working efficiency is high. After one-time blow washing and two-time water washing, the starch and the bean gum in the sweetened bean paste are thoroughly washed, the sandy property is purer, and the quality of finished products is better.
And in the fourth and fifth steps, the starch and bean gum solution flushed from the second and third groups of hexagonal sieves flows out of the sieve mesh and enters a water storage tank.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. A quicksand type sand washing method is characterized in that:
firstly, conveying cooked beans to a pulping machine through a first conveying pump to be pulped into slurry, and enabling the slurry to flow into a sand washing pool to be diluted by adding water;
secondly, blowing and washing the bean curd skin, the bean gum, the bean paste, the starch and the crude fiber in a sand washing pool by using a high-pressure air pump;
thirdly, slurry in the sand washing tank is conveyed to a first group of hexagonal sieves for screening while grinding and purging, the first group of hexagonal sieves separate bean skins and crude fibers from bean gum, bean paste and starch, the bean skins and the crude fibers flow out of a screen mesh of the first group of hexagonal sieves to a material receiving barrel, and the bean paste containing the starch and the bean gum flows out of a screen mesh of the first group of hexagonal sieves to enter a first storage tank;
fourthly, conveying the bean paste containing the starch and the bean gum in the first storage tank to a second group of hexagonal sieves by using a third conveying pump, and simultaneously preparing a first high-pressure water pump spraying device, wherein only liquid in the second group of hexagonal sieves flows out of meshes of the sieve mesh, so that the starch and the bean gum in the bean paste are fully washed out;
fifthly, the bean paste washed in the fourth step flows into a third group of hexagonal sieves from the second group of hexagonal sieves, the bean paste flowing into the third group of hexagonal sieves is used for completely separating starch and bean gum from the bean paste again by using a second high-pressure water pump spraying device, and the cleaned bean paste without any impurities flows into a second storage tank;
and sixthly, the bean paste in the second storage pool is conveyed into the sand press through a fourth conveying pump without precipitation to be dehydrated into sand.
2. A quicksand method as claimed in claim 1, wherein: in the first step, the beans are cooked in a bean cooker or a bean pot.
3. A quicksand method as claimed in claim 1, wherein: in the third step, the first group of hexagonal sieves adopts a sieve mesh with 50-80 meshes to separate materials, and the rotating speed is 20-30 r/min.
4. A quicksand method as claimed in claim 1, wherein: in the fourth and fifth steps, the second group of hexagonal sieves and the third group of hexagonal sieves adopt a sieve with 350-450 meshes to separate materials, and the rotating speed is 40-60 r/min.
5. A quicksand method as claimed in claim 1, wherein: in the fourth and fifth steps, the starch and bean gum solution washed out from the second group of hexagonal sieves and the third group of hexagonal sieves flows out of the screen mesh and enters a water storage tank.
6. The utility model provides a quicksand formula sand washing equipment which characterized in that: the sand washing and screening device comprises a pulp grinder, a sand washing tank, a first group of hexagonal sieves, a first storage tank, a second group of hexagonal sieves, a third group of hexagonal sieves, a second storage tank and a sand press; the pulping machine is communicated with the sand washing pool through a first conveying pump, and a high-pressure air pump for blowing air into the sand washing pool is arranged outside the sand washing pool; the sand washing tank is conveyed to the first group of hexagonal sieves through a second conveying pump, substances flowing out of a screen mesh of the first group of hexagonal sieves are led to the first storage tank, the first storage tank is conveyed to the second group of hexagonal sieves through a third conveying pump, and first high-pressure water pump spraying equipment is arranged on the second group of hexagonal sieves; the materials left in the screen mesh of the second group of hexagonal screens are led to the third group of hexagonal screens, and second high-pressure water pump spraying equipment is arranged on the third group of hexagonal screens; and materials remained on the screen mesh of the third group of hexagonal screens are led to the second storage tank, and the second storage tank is conveyed to the sand press through a fourth conveying pump.
7. Quicksand washing apparatus as claimed in claim 6 wherein: the first group of hexagonal sieves adopts a sieve mesh of 50-80 meshes to separate materials, and the rotating speed is 20-30 r/min.
8. Quicksand washing apparatus as claimed in claim 6 wherein: the second group of hexagonal sieves and the third group of hexagonal sieves adopt a sieve with 350-450 meshes to separate materials, and the rotating speed is 40-60 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337500.2A CN108465546B (en) | 2018-04-16 | 2018-04-16 | Quicksand type sand washing method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810337500.2A CN108465546B (en) | 2018-04-16 | 2018-04-16 | Quicksand type sand washing method and equipment |
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| Publication Number | Publication Date |
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| CN108465546A CN108465546A (en) | 2018-08-31 |
| CN108465546B true CN108465546B (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810337500.2A Active CN108465546B (en) | 2018-04-16 | 2018-04-16 | Quicksand type sand washing method and equipment |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2167528Y (en) * | 1993-07-14 | 1994-06-08 | 黑龙江省科学院自动化研究所 | Automatic unit for making free-flowing powder |
| CN102524689A (en) * | 2012-02-15 | 2012-07-04 | 上海禧月食品有限公司 | Peeling and bean paste-washing process for beans fillings |
| CN202456300U (en) * | 2012-02-15 | 2012-10-03 | 上海禧月食品有限公司 | Flow system device for peeling and sand washing for beans stuffing |
| CN102771729A (en) * | 2012-08-22 | 2012-11-14 | 上海禧月食品有限公司 | Bean filling preparation optimizing process |
| CN104012881A (en) * | 2014-06-08 | 2014-09-03 | 肖飞 | Integrated automatic bean paste manufacturing and washing machine |
| CN204707931U (en) * | 2015-05-06 | 2015-10-21 | 牛春玉 | A kind of beans decortication sand washer |
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Effective date of registration: 20210929 Address after: 071000 Xiniu village, Rongcheng County, Baoding City, Hebei Province Patentee after: Rongcheng Zhenghong Food Machinery Manufacturing Co.,Ltd. Address before: 071700 No. 3, Article 2, Xing'an Street, Xiniu village, Nanzhang Town, Rongcheng County, Baoding City, Hebei Province Patentee before: Xiao Yingchun |