CN102156070B - Belt full width tensile fixture and horizontal belt tensile testing machine - Google Patents
Belt full width tensile fixture and horizontal belt tensile testing machine Download PDFInfo
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- CN102156070B CN102156070B CN 201110144581 CN201110144581A CN102156070B CN 102156070 B CN102156070 B CN 102156070B CN 201110144581 CN201110144581 CN 201110144581 CN 201110144581 A CN201110144581 A CN 201110144581A CN 102156070 B CN102156070 B CN 102156070B
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- stretching clamp
- testing machine
- belt
- propulsion system
- slide plate
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
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- Life Sciences & Earth Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a belt full width tensile fixture and a horizontal belt tensile testing machine. The support of the fixture comprises two vertical plates vertically fixed on a base plate; an included angle formed by the inner surfaces of the two vertical plates is alpha, and the alpha is more than or equal to 13 degrees and less than or equal to 23 degrees; the inner surface of each wedge-shaped sliding plate is connected with a clamp block through a matching structure of dovetail grooves and dovetail strips arranged vertically; the inner surface of the clamp block is a friction face with mesh-shaped friction threads; the inner surface of the mesh-shaped friction threads of the clamp block can provide maximal holding force and friction force for belt full width, thus the condition that the enough tensile force can be provided for a belt by the clamp block in tensioning so as to keep the belt from sliding can be satisfied, and the belt is ensured not to be pressed and damaged to influence the test. The tensile testing machine applying the fixture is convenient for operation, is safe and can be moved, and has the advantages of simple structure, energy saving, environmental friendliness, low manufacturing cost and low testing cost; and by the tesnsile testing machine, one person can complete the whole testing process.
Description
Technical field
The present invention relates to the technical field of a kind of and mining monoblock degree belt checkout equipment, especially a kind of whole width apron drawing anchor clamps and horizontal apron drawing testing machine.
Background technology
In the material tensile test field, must reliable clamping sample, it is moving to prevent from skidding, and could accurately ask for the technical parameters such as tensile strength, yield strength, extensibility, unrelieved stress, elastic modulus of material.Existing anchor clamps have following shortcoming:
For the field, colliery, the mechanical property of belt is had relatively high expectations, and existing testing machine is difficult to reply, and existing testing machine can not be finished the fully detection to mine leather belt because the design defect of itself can not be done rupture test substantially.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of whole width apron drawing anchor clamps and horizontal apron drawing testing machine.
The present invention adopts following technical scheme to realize its purpose: a kind of whole width apron drawing anchor clamps, contain support, wedge shape slide plate and grip block, described support comprises two risers that are vertically fixed on the base plate, the inside surface angle of two risers is α, and 13 °≤α≤23 °, the wedge shape slide plate of two symmetries mates respectively and is fitted on the two riser inside surfaces, and the inside surface of this two wedge shapes slide plate is parallel to each other; Dovetail groove and coattail strip fit structure by vertical setting between the inside surface of each wedge shape slide plate and the grip block link together; The inside surface of described grip block is the rubbing surface with netted friction line, and clamping has belt between two grip blocks, and belt width is suitable with the rubbing surface height, and the scope of rubbing surface width L is 240mm～410mm.
The inside surface angle α of two risers, satisfied 15 °≤α≤20 °, and the length of rubbing surface width L is 340mm
The bottom of described wedge block and/or grip block is provided with slide mechanism.
Described slide mechanism is chute to be set and steel ball to be installed or roller in the bottom of wedge block and/or grip block.
Be fixed with respectively brace rod on the outside surface of vertical plates on both sides, perhaps the top of vertical plates on both sides is fixed with web joint.
A kind of horizontal apron drawing testing machine, comprise pedestal, stretching clamp, propulsion system, the fixedly stretching clamp that is positioned at the left side and the movable stretching clamp that is positioned at the right side are installed on the pedestal simultaneously, support is set and propulsion system are installed on the right side pedestal of movable stretching clamp, the left end of these propulsion system is provided with the bearing that is fixed on the pedestal, be connected by pressure transducer between propulsion system and this bearing, vertically be fixed with the load top board on the right-hand member push rod of propulsion system, the both sides of this load top board are connected with the both sides of travel(l)ing rest by symmetrical pull bar; Described fixedly stretching clamp and movable stretching clamp comprise respectively support, wedge shape slide plate and grip block, its medium-height trestle comprises two risers that are vertically fixed on the base plate, the inside surface angle of two risers is α, and 13 °≤α≤23 °, the wedge shape slide plate of two symmetries mates respectively and is fitted on the two riser inside surfaces, and the inside surface of this two wedge shapes slide plate is parallel to each other; Dovetail groove and coattail strip fit structure by vertical setting between the inside surface of each wedge shape slide plate and the grip block link together; The inside surface of described grip block is the rubbing surface with netted friction line, and the scope of rubbing surface width L is 240mm～410mm.
Be fixed with respectively brace rod on the vertical plates on both sides outside surface of fixed support and travel(l)ing rest, perhaps the top of vertical plates on both sides is fixed with web joint.
Be provided with mounting hole on the travel(l)ing rest supported on both sides muscle, the left end of monosymmetric pull bar is fixedly mounted in this mounting hole, the right-hand member of two lateral bracing struts arranges thread segment and inserts respectively in the mounting hole of load top board, and two lateral bracing struts stretch out the outer part of load roof hole regulating nut is installed.
Described propulsion system are lifting jack or hydraulic cylinder or are cylinder.
Described propulsion system, pressure transducer, fixedly the center line of apron drawing anchor clamps and mobile belt stretching clamp is positioned on the same axis, and described pull bar is two both sides that are symmetrically distributed in above-mentioned axis.
Fixedly the bottom of the wedge block of stretching clamp and movable stretching clamp and/or grip block is provided with slide mechanism, and this slide mechanism is groove to be set and steel ball to be installed or roller in the bottom of wedge block and/or grip block.
The beneficial effect of technical scheme provided by the invention is: whole width apron drawing anchor clamps can be realized the rupture test to mine leather belt by the angle of the angle of two risers of appropriate design and the width of friction plate.13 °≤the α of inside surface angle of two risers≤23 °, and the scope 240mm of rubbing surface width L～410mm, the netted friction line inside surface of grip block provide maximum holding force and friction force can for the whole width of belt.Prove that by many experiments this structural design can satisfy that grip block provides enough pulling force to keep it not slide to belt when stretching, the part that can guarantee again belt is not damaged by pressure and is affected the carrying out of test.
This bottom with the wedge shape slide plate of angle is equipped with rolling mechanism, can farthest reduce friction force between wedge shape slide plate and the base plate, thereby reduces friction force to the interference of test accuracy.
This horizontal apron drawing testing machine promotes the load top board by propulsion system, utilize the two lateral balances pulling pull bar of load top board, and then driving mobile belt stretching clamp, no longer design sliding rail, simplify the structure, and can avoid the sliding rail linearity bad or because being subjected to the factors such as force unbalance on the impact of test accuracy, improve the reliability of whole testing machine.
Be used for supporting the hold-down support of sensor and propulsion system and described fixedly apron drawing anchor clamps can be separately fixed on separately the base plate in this horizontal apron drawing testing machine, thereby amplification that can be unlimited is the distance between apron drawing anchor clamps and the mobile belt stretching clamp fixedly, can detect the mine leather belt of any length, thereby expand the detectability of this machine.
No matter the tradition tension tester is vertical or the horizontal test machine, all has following defective: machine all is the fixed installation formula, body weight is large, jaw is short, holding force is little, the finite space is little, cost of manufacture and experimentation cost are all very high.
This machine is simple in structure, and handiness only needs this machine is fixed on the ground, and a people just can finish the operation of whole process of the test, can significantly reduce the labor capacity that detects test.Energy-saving and environmental protection, safe, removable, cost of manufacture and experimentation cost are all very low.
Description of drawings
Fig. 1 is the plan structure synoptic diagram of the whole width apron drawing of the present invention anchor clamps;
Fig. 2 is the side structure synoptic diagram of grip block among Fig. 1;
Fig. 3 is the Facad structure synoptic diagram of Fig. 2;
Fig. 4 is the plan structure synoptic diagram of the horizontal apron drawing testing machine of the present invention;
Fig. 5 is the C-C cross-sectional view of Fig. 4;
Fig. 6 is the A-A cross-sectional view of Fig. 5;
Fig. 7 is the B-B cross-sectional view of Fig. 5.
Among the figure, label 1 is riser, and 2 is the wedge shape slide plate, 3 is grip block, and 31 is coattail strip, and 32 is rubbing surface, 4 is pedestal, and 5 is pull bar, and 6 is propulsion system, 7 is the load top board, and 8 is sensor, and 9 is bearing, 10 mounting holes, 11 is otic placode (brace rod), and 12 is brace rod, and 13 is fixed base plate, 14 removable bottoms, 15 is mattess, and 16 is pre-embedded bolt, and 17 is the pressure transducer bearing, 18 is the propulsion system support, 19 is (guiding) chute, and 20 is steel ball or roller, and 21 are fixture (bolt is fixed or is welded and fixed).
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail:
Embodiment one: referring to Fig. 1, and Fig. 2, Fig. 3.A kind of whole width apron drawing anchor clamps, the outside surface of vertically fixing two riser 1, two risers 1 on base plate do not limit but inside surface tilts and be symmetrical, and the angle that the inside surface of two risers 1 tilts is α, and 13 °≤α≤23 °.
The wedge shape slide plate 2 of two symmetries mates respectively and is fitted on two risers, 1 inside surface, thereby the outside surface angle of two wedge shape slide plates 2 also is α, and 13 °≤α≤23 °.The inside surface of this two wedge shapes slide plate 2 is parallel to each other.
Dovetail groove and coattail strip 31 fit structures by vertical setting between the inside surface of each wedge shape slide plate 2 and the grip block 3 link together.The inside surface of described grip block 3 is with clamping between rubbing surface 32, two grip blocks of netted friction line belt to be arranged, and belt width is suitable with the rubbing surface height, and the scope of rubbing surface 32 width L is 240mm～410mm.
The top that is fixed with respectively brace rod 12(or vertical plates on both sides on the outside surface of vertical plates on both sides 1 is fixed with web joint).
Embodiment two: referring to Fig. 1, and Fig. 2, Fig. 3.A kind of whole width apron drawing anchor clamps, anchor clamps are identical with embodiment one, do not repeat, and different is, and the angle that the inside surface of two risers 1 tilts is α, and 15 °≤α≤20 °.Thereby the outside surface angle of two wedge shape slide plates 2 also is α, and 15 °≤α≤20 °.The scope of 31 face width degree L of rubbing is 300mm, or 340mm, or 350mm etc.
Embodiment three: accompanying drawing is not drawn.A kind of hard-wired whole width apron drawing anchor clamps, anchor clamps are identical with embodiment one, do not repeat, and different is directly two risers 1 to be fixed on the substrate 4 of cupping machine.
Embodiment four: referring to Fig. 1, and Fig. 2, Fig. 3, Fig. 6.A kind of hard-wired whole width apron drawing anchor clamps, anchor clamps are identical with embodiment one, do not repeat, and present embodiment is anchor clamps to be bolted or to be weldingly fixed on the substrate of cupping machine, referring to label 21.Among Fig. 6, the bottom of described wedge block 2 and/or grip block 3 is provided with slide mechanism.This slide mechanism is chute 19 to be set in the bottom of wedge block and/or grip block and steel ball to be installed or roller 20.
Embodiment five: referring to Fig. 1, and Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7.A kind of horizontal apron drawing testing machine is embedded with bolt 16 in the reinforced concrete ground 15, bar shaped pedestal 4 is fixed on the pre-embedded bolt 16.The fixedly stretching clamp that is positioned at the left side and the movable stretching clamp that is positioned at the right side are installed on the pedestal 16 simultaneously, support 18 is set and propulsion system 6 are installed on the right side pedestal 4 of movable stretching clamp, these propulsion system are lifting jack or hydraulic cylinder or are cylinder.
The left end of these propulsion system 6 is provided with bearing 9 and the bearing 17 that is fixed on the pedestal 4, is installed with pressure transducer 8 on the bearing 17.The left end of propulsion system 6 is connected with pressure transducer 8, and the left end top of pressure transducer 8 is pressed on the bearing 9.
Vertically be fixed with load top board 7 on the right-hand member push rod of propulsion system 6, the both sides of this load top board 7 arrange respectively mounting hole.Be provided with mounting hole 10 on the travel(l)ing rest both sides otic placodes (brace rod) 11, the left end of monosymmetric pull bar 5 is fixedly mounted in this mounting hole 10, the right-hand member of two lateral bracing struts 5 arranges thread segment and inserts respectively in the mounting hole 10 of load top board 7, and two lateral bracing struts 5 stretch out the outer part of load roof hole regulating nut is installed.
The outside surface of vertically fixing two riser 1, two risers 1 on base plate does not limit but inside surface tilts and be symmetrical, and the angle that the inside surface of two risers 1 tilts is α, and 13 °≤α≤23 °.The wedge shape slide plate 2 of two symmetries mates respectively and is fitted on two risers, 1 inside surface, thereby the outside surface angle of two wedge shape slide plates 2 also is α, and 13 °≤α≤23 °.The inside surface of this two wedge shapes slide plate 2 is parallel to each other.Dovetail groove and coattail strip 32 fit structures by vertical setting between the inside surface of each wedge shape slide plate 2 and the grip block 3 link together.The inside surface of described grip block 3 is the rubbing surfaces 31 with netted friction line, and the scope of rubbing surface 31 width L is 240mm～410mm.
The top that is fixed with respectively brace rod 12(or vertical plates on both sides on the outside surface of vertical plates on both sides 1 is fixed with web joint).Described propulsion system, pressure transducer, fixedly the center line of apron drawing anchor clamps and mobile belt stretching clamp is positioned on the same axis, and described pull bar is two both sides that are symmetrically distributed in above-mentioned axis.The bottom of described wedge block 2 and/or grip block 3 is provided with slide mechanism.This slide mechanism is chute 19 to be set in the bottom of wedge block and/or grip block and steel ball to be installed or roller 20.
Claims (6)
1. horizontal apron drawing testing machine, comprise pedestal, stretching clamp, propulsion system, it is characterized in that: the fixedly stretching clamp that is positioned at the left side and the movable stretching clamp that is positioned at the right side are installed on the pedestal simultaneously, support is set and propulsion system are installed on the right side pedestal of movable stretching clamp, the left end of these propulsion system is provided with the bearing that is fixed on the pedestal, be connected by pressure transducer between propulsion system and this bearing, vertically be fixed with the load top board on the right-hand member push rod of propulsion system, the both sides of this load top board are connected with the both sides of movable stretching clamp by symmetrical pull bar; Described fixedly stretching clamp and movable stretching clamp comprise respectively support, wedge shape slide plate and grip block, its medium-height trestle comprises two risers that are vertically fixed on the base plate, the inside surface angle of two risers is α, and 13 °≤α≤23 °, the wedge shape slide plate of two symmetries mates respectively and is fitted on the two riser inside surfaces, and the inside surface of this two wedge shapes slide plate is parallel to each other; Dovetail groove and coattail strip fit structure by vertical setting between the inside surface of each wedge shape slide plate and the grip block link together; The inside surface of described grip block is the rubbing surface with netted friction line, and the scope of rubbing surface width L is 240mm～410mm.
2. horizontal apron drawing testing machine according to claim 1, it is characterized in that: fixedly be fixed with respectively brace rod on the vertical plates on both sides outside surface of stretching clamp and movable stretching clamp, perhaps the top of vertical plates on both sides is fixed with web joint.
3. horizontal apron drawing testing machine according to claim 2, it is characterized in that: be provided with mounting hole on the movable stretching clamp supported on both sides muscle, the left end of monosymmetric pull bar is fixedly mounted in this mounting hole, the right-hand member of two lateral bracing struts arranges thread segment and inserts respectively in the mounting hole of load top board, and two lateral bracing struts stretch out the outer part of load roof hole regulating nut is installed.
4. horizontal apron drawing testing machine according to claim 1 is characterized in that: described propulsion system are lifting jack or hydraulic cylinder or are cylinder.
5. horizontal apron drawing testing machine according to claim 1, it is characterized in that: fixedly the wedge shape slide plate of stretching clamp and movable stretching clamp and/or the bottom of grip block are provided with slide mechanism, and this slide mechanism is groove to be set and steel ball to be installed or roller in the bottom of wedge shape slide plate and/or grip block.
6. horizontal apron drawing testing machine according to claim 1 is characterized in that: the fixing inside surface angle α of two risers of stretching clamp and movable stretching clamp satisfy 15 °≤α≤20 °, and the length of rubbing surface width L is 340mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144581 CN102156070B (en) | 2011-05-31 | 2011-05-31 | Belt full width tensile fixture and horizontal belt tensile testing machine |
| PCT/CN2012/074941 WO2012163210A1 (en) | 2011-05-31 | 2012-04-28 | Whole width belt tensile fixtures and horizontal belt tensile testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110144581 CN102156070B (en) | 2011-05-31 | 2011-05-31 | Belt full width tensile fixture and horizontal belt tensile testing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102156070A CN102156070A (en) | 2011-08-17 |
| CN102156070B true CN102156070B (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110144581 Active CN102156070B (en) | 2011-05-31 | 2011-05-31 | Belt full width tensile fixture and horizontal belt tensile testing machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102156070B (en) |
| WO (1) | WO2012163210A1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156070B (en) * | 2011-05-31 | 2013-04-17 | 河南省煤炭科学研究院有限公司 | Belt full width tensile fixture and horizontal belt tensile testing machine |
| CN102706741A (en) * | 2012-07-03 | 2012-10-03 | 济南科汇试验设备有限公司 | High-rigid clamp of testing machine |
| CN102778392B (en) * | 2012-08-03 | 2014-07-09 | 西安永电电气有限责任公司 | Push-pull force test clamping device and equipment |
| CN102954916A (en) * | 2012-12-05 | 2013-03-06 | 吴江忆久纺织有限公司 | Textile strength tester |
| CN103245559B (en) * | 2013-04-10 | 2015-07-01 | 深圳三思纵横科技股份有限公司 | Metal tensile test method and device capable of preventing force failure |
| CN103389245B (en) * | 2013-08-07 | 2015-09-02 | 浙江富邦集团有限公司 | A kind of tension detecting apparatus of leather |
| CN103674700B (en) * | 2013-12-04 | 2016-04-06 | 河南省煤炭科学研究院有限公司 | The pre-pulling test machine of the long wire rope of km |
| CN103760017A (en) * | 2014-02-18 | 2014-04-30 | 北京工业大学 | Carbon fiber reinforced composite laminate compression test clamp and test method using same |
| CN104020043A (en) * | 2014-06-20 | 2014-09-03 | 中国科学院理化技术研究所 | Tool clamp for testing low-temperature mechanical tensile properties of fiber reinforced composite material |
| CN105181305B (en) * | 2015-06-12 | 2018-03-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Ratchet wheel tensioner detection means and detection method |
| CN105445098B (en) * | 2015-12-10 | 2018-04-13 | 江门气派摩托车有限公司 | A kind of shearing test brake shoe fixture |
| CN105547840A (en) * | 2016-02-01 | 2016-05-04 | 单正威 | Static tensile testing machine for students |
| CN109060517B (en) * | 2018-08-30 | 2019-06-14 | 南京禹智智能科技有限公司 | A kind of industrial intelligent grip device |
| CN111707534B (en) * | 2020-07-03 | 2023-06-30 | 广东乐的互动娱乐股份有限公司 | Stretching detection equipment and method for intelligent toy rubber piece |
| CN112393980B (en) * | 2020-11-11 | 2022-03-25 | 南通德众科技发展有限公司 | 3000-ton large-scale multifunctional structure test platform |
| CN113933163B (en) * | 2021-11-05 | 2024-05-24 | 湖南贝恩叮当猫婴童用品有限公司 | Paper diaper quality detection device and detection method thereof |
| CN114354361B (en) * | 2022-03-16 | 2022-05-20 | 潍坊昌大建设集团有限公司 | Steel bar connection strength detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724266A (en) * | 1971-09-02 | 1973-04-03 | Kimberly Clark Co | Web strength and tensile tester and method |
| CN2242457Y (en) * | 1995-09-14 | 1996-12-11 | 机械工业部长春试验机研究所 | Chuck adapted sepcially for testing machine for testing steel rope |
| CN201078751Y (en) * | 2007-05-25 | 2008-06-25 | 上海新三思计量仪器制造有限公司 | Self-lubricating inlaying steel guide plate for metal tensile testing machine |
| CN201583444U (en) * | 2009-08-06 | 2010-09-15 | 北京金盛鑫检测仪器有限公司 | Electronic universal tester |
| CN201607367U (en) * | 2010-03-08 | 2010-10-13 | 骏谚精机股份有限公司 | Fixture of tensile testing machine |
| CN101943646A (en) * | 2010-09-01 | 2011-01-12 | 朱金辉 | Full-automatic horizontal electronic tension tester |
| CN202075177U (en) * | 2011-05-31 | 2011-12-14 | 河南省煤炭科学研究院有限公司 | Whole-width belt tensile fixture and horizontal belt tensile testing machine |
| CN102156070B (en) * | 2011-05-31 | 2013-04-17 | 河南省煤炭科学研究院有限公司 | Belt full width tensile fixture and horizontal belt tensile testing machine |
-
2011
- 2011-05-31 CN CN 201110144581 patent/CN102156070B/en active Active
-
2012
- 2012-04-28 WO PCT/CN2012/074941 patent/WO2012163210A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012163210A1 (en) | 2012-12-06 |
| CN102156070A (en) | 2011-08-17 |
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Inventor after: Fu Quanzhen Inventor after: Chen Xuefeng Inventor after: Liang Wei Inventor after: Sun Fubao Inventor after: Deng Bo Inventor after: Li Meng Inventor after: Huang Tao Inventor after: Fang Xiaoyu Inventor after: Fan Jinzhi Inventor after: Yu Xiaolong Inventor after: Zhang Ping Inventor after: Li Junfeng Inventor before: Fu Quanzhen |
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Effective date of registration: 20190128 Address after: 450000 17 Fengyang street, hi tech Industrial Development Zone, Zhengzhou, Henan Patentee after: Henan Coal Academy Testing Technology Co., Ltd. Address before: 45 000 1 No. 17 Fengyang Street, Zhengzhou High-tech Zone, Henan Province Patentee before: Henan Coal Science Research Institute Co., Ltd. |