CN109297827A - Coke oven tamping tool rises case power test bracket - Google Patents

Coke oven tamping tool rises case power test bracket Download PDF

Info

Publication number
CN109297827A
CN109297827A CN201811167194.9A CN201811167194A CN109297827A CN 109297827 A CN109297827 A CN 109297827A CN 201811167194 A CN201811167194 A CN 201811167194A CN 109297827 A CN109297827 A CN 109297827A
Authority
CN
China
Prior art keywords
air bag
coke oven
pressure cell
support frame
tamping tool
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.)
Granted
Application number
CN201811167194.9A
Other languages
Chinese (zh)
Other versions
CN109297827B (en
Inventor
纪林章
马向华
牛凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Institute of Technology
Original Assignee
Shanghai Institute of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Institute of Technology filed Critical Shanghai Institute of Technology
Priority to CN201811167194.9A priority Critical patent/CN109297827B/en
Publication of CN109297827A publication Critical patent/CN109297827A/en
Application granted granted Critical
Publication of CN109297827B publication Critical patent/CN109297827B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12Pressure testing
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B37/00Mechanical treatments of coal charges in the oven
    • C10B37/04Compressing charges
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B41/00Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B41/00Safety devices, e.g. signalling or controlling devices for use in the discharge of coke
    • C10B41/005Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for charging coal
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B45/00Other details
    • C10B45/02Devices for producing compact unified coal charges outside the oven

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

Rise case power test bracket the present invention relates to a kind of coke oven tamping tool, at least one case force test device that rises is connected by the sliding slot of two sides in support frame, the case force test device that rises is made of air bag component, cover board and pressure cell locating piece, it is fixedly connected between air bag component and pressure cell locating piece by cover board positioning, air bag component upper end is fixed by the snap ring being mounted in the sliding slot of support frame;Pressure cell positioning block bottom is fixed by being mounted on the bottom plate of support frame bottom;Air bag switch lever top is connect by safety pin with support frame, and the rotating handle connection of lower part and air bag component, rotating handle connects ball valve, the high pressure chest and low pressure chamber of ball valve communicated air bags component by ball valve rod.The test bracket can solve coke oven tamping tool and rise in the test of case power, the problem of pressure cell can not take out after pressure cell can not be fixedly mounted and test.Test bracket structure is simple, and manufacturing cost is low, can require freely to assemble according to on-the-spot test, measuring distance is freely arranged according to coal bin depth.

Description

Coke oven tamping tool rises case power test bracket
Technical field
The present invention relates to a kind of test bracket, it is especially a kind of suitable for testing coke oven tamping tool tamping briquette when the case that rises The bracket of power rises case power with soil pressure cell with the use of test coal bin.
Background technique
The case power that rises is a kind of parameter that case structure is often tested, and is the major parameter for reacting box house pressure, is true Determine the important evidence of tank thickness and box deformation.Coking mixed coal is pressed the size of carbonization chamber by tamping tool, is made firm by ramming into and is slightly less than Then the briquette made firm by ramming is carried out high-temperature retorting from the side of carbonization chamber push-in carbonization chamber by coal pusher by the briquette of carbonization chamber. Briquette has to the density made firm by ramming to requiring, and briquette cross-sectional sizes are less than carbonization chamber, otherwise easily cause the coal that collapses, this will It asks and periodically the case power that rises for making machine-made egg-shaped or honey-comb coal briquets case firm by ramming is detected.The method for testing the case power that rises at present can be divided into according to means of testing difference Two kinds:
(1) direct method of testing.The case power that rises directly is tested through the method frequently with pre-buried soil pressure cell sensor.Test Soil pressure cell is mounted on coal bin wall according to certain height and sequence before, then briquette is smash according to making technique firm by ramming Gu soil pressure cell exports real-time pressure parameter.
(2) indirectly testing method.Indirectly testing method can be using the deformation of test coal bin or survey according to device structure situation difference The method of examination coal bin supporting point support force carries out indirectly testing and obtains.
But at the scene in test, there are certain drawbacks in both the above method:
(1) data measured using the method that soil pressure cell is directly tested are the most accurate, but tester needs to enter Box house carries out the installation of soil pressure cell, and very widely used today SCP makes the high 6.5m of all-in-one machine coal bin, wide 50cm firm by ramming, surveys Examination personnel hardly enter, even if entering reluctantly, in 2 meters of coal bin or more height and position installation pressure cells, there is also very big difficulties.? When working in coal bin, there is also some potential safety problemss to human respiratory for coal dust.
(2) when the method directly tested using soil pressure cell, after briquette makes molding firm by ramming, soil pressure cell is completely embedded into briquette It can not take out in the middle.Pressure cell is expensive, and this disposable test will cause the waste of experiment sensor, greatly increases Testing cost.
(3) signal transmssion line of soil pressure cell is embedded among briquette simultaneously, may cause signal during compacting Line is damaged, makes signal Transmission or test data inaccuracy.
(4) indirectly testing is carried out according to side outside the enclosure, experimental data can be by patch location, patch quality, cabinet knot The multifactor impacts such as structure, test data is not accurate enough, repeatable bottom, or even can directly contribute test crash.
Summary of the invention
The present invention is to provide for a kind of coke oven tamping tool and rises case power test bracket, which makes with soil pressure cell cooperation It is directly tested with to the case power that rises, test data directly, accurately, can take out together bracket and soil pressure cell after test, Sensor can be recycled, and testing cost has been greatly saved.
To achieve the above object, the case power test bracket the technical scheme is that a kind of coke oven tamping tool rises, including gas Capsule switch lever, support frame, snap ring, air bag component, cover board, pressure cell locating piece, bottom plate, safety pin lead in support frame as described above The sliding slot for crossing two sides connects at least one case force test device that rises, and the case force test device that rises is by air bag component, cover board and pressure Power box locating piece composition is fixedly connected between air bag component and pressure cell locating piece by cover board positioning, and air bag component upper end is logical The snap ring being mounted in the sliding slot of support frame is crossed to fix;The pressure cell locating piece is provided with soil pressure cell sensor;The pressure Power box positioning block bottom is fixed by being mounted on the bottom plate of support frame bottom;Air bag switch lever top by safety pin with The rotating handle of support frame connection, lower part and air bag component connects, and rotating handle connects ball valve by ball valve rod, and ball valve is connected to gas The high pressure chest and low pressure chamber of capsule component.
Further, the two sides of the air bag component, cover board and pressure cell locating piece are equipped with sliding block, and pass through sliding block and branch The sliding slot of two sides is cooperatively connected inside support.
Further, the high pressure chest of the air bag component is equipped with air bag inflating port, and low pressure chamber is equipped with flexible sheet, and is equipped with Air bag gas vent.
Further, when test coal dust make firm by ramming molding coal bin rise case power when, the coke oven tamping tool rises case power test bracket It is close to coal bin inner wall;Molding coal bin side wall is made firm by ramming when opening coal dust, and the coke oven tamping tool case power test bracket that rises is compacted nothing When method directly takes out, the air bag switch lever pulls opening ball valve by pulling out safety pin, makes pressure-air by air bag component High pressure chest enters low pressure chamber, and flexible sheet is heaved, make coke oven tamping tool rise case power test bracket and briquette separation, take out coke oven Tamping tool rises case power test bracket.
The beneficial effects of the present invention are:
1. soil pressure cell sensor is put into coke oven tamping tool coal bin after being mounted in pressure cell locating piece, can directly survey The case power that rises is tried, test result is directly, accurately.
2. soil pressure cell sensor and the case power test bracket that rises directly are inserted into coal bin from coke oven tamping tool coal bin top Portion does not need tester and enters installation soil pressure cell sensor inside coal bin, improves the convenience and safety of installation.
It carries out independent or multiple while installing 3. air bag component, cover board and pressure cell locating piece can be freely combined, test Freedom degree is high.
4. directly can directly be extracted bracket at the top of coal bin after the completion of test, if briquette compacting is tighter, can open Air bag switch takes out from coal bin again after releasing bracket.It can be used repeatedly for soil pressure cell sensor and test bracket, greatly Save testing cost.
5. soil pressure cell signal wire is drawn from internal stent, the contact of not direct and briquette avoids the survey such as signal wire breakage Try hidden danger.
Therefore, the configuration of the present invention is simple manufacturing cost is low, with soil pressure cell cooperation can rise to coke oven tamping tool case power into Row directly test, solve the problems, such as before rise case power test in soil pressure cell it is difficult to install and test after can not take out, mention The high convenience of test, greatly reduces testing cost.
Detailed description of the invention
Fig. 1 is that coke oven tamping tool of the invention rises case power test bracket structural front view;
Fig. 2 is that coke oven tamping tool of the invention rises the left cross-sectional view of case power test bracket structure;
Fig. 3 is snap ring schematic diagram;
Fig. 4 is pressure cell positioning block structure main view;
Fig. 5 is the left cross-sectional view of Fig. 4;
Fig. 6 is the top view of Fig. 4;
Fig. 7 is the main view of cover board;
Fig. 8 is the top view of Fig. 7;
Fig. 9 is bottom plate main view;
Figure 10 is the left cross-sectional view of Fig. 9;
Figure 11 is the top view of Fig. 9;
Figure 12 is support frame main view;
Figure 13 is the top view of Figure 12;
Figure 14 is air bag component main view;
Figure 15 is the left cross-sectional view of air bag component;
Figure 16 is the top view of air bag component;
Figure 17 is two kinds of working conditions of the coal bin of coke oven tamping tool;
Wherein: (a) being coal bin side wall closed state, (b) be coal bin side wall opening state.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
As shown in Fig. 1 to Figure 16, a kind of coke oven tamping tool rises case power test bracket, including air bag switch lever (1), support frame 2, snap ring 3, air bag component 4, cover board 5, pressure cell locating piece 6, bottom plate 7 and safety pin 8.
There is sliding slot inside 2 two sides of support frame, bottom plate 7 is mounted on support frame bottom, air bag component 4, cover board 5 and pressure cell There are sliding block in 6 two sides of locating piece, are mounted on support frame 2 along the chute, and the installation of snap ring 3 plays fixation balloon component 4, lid on the chute The effect of plate 5 and pressure cell locating piece 6.Air bag component 4, cover board 5 and pressure cell locating piece 6 can be freely combined, and carry out independent Or it is multiple install simultaneously, erection sequence and position can freely adjust.Plurality of specifications can be set to facilitate to different coals in cover board 5 The case power that rises of case height is tested.
Such as Figure 14, shown in 15,16, air bag component 4 include ball valve 9, flexible sheet 10, rotating handle 11, ball valve rod (12), Air bag inflating port 13 and air bag gas vent 14.1 top of air bag switch lever is connect by safety pin 8 with support frame 2, lower part and rotation Handle 11 connects, and rotating handle 11 is connect with ball valve rod 12, and ball valve rod 12 is connect with ball valve 9.Ball valve 9 divides air bag component 4 High pressure chest and low pressure chamber, high pressure chest are equipped with air bag inflating port 13, and low pressure chamber is equipped with flexible sheet 10 and air bag gas vent 14.
Coke oven tamping tool workflow are as follows: coal bin side wall 20 closes (as shown in Figure 17 (a) state), and coal conveyor is according to setting Make firm by ramming technique and program quantitative coal dust is added in coal bin by several times, tamping hammer makes coal dust firm by ramming, until setting journey Sequence is completed, and coal dust is made firm by ramming molding, and then coal bin side wall 20 opens (as shown in Figure 17 (b) state), and coal pusher will make molding firm by ramming Briquette 21 be pushed into carbonization chamber, coal pusher is retracted rear coal bin side wall 20 and is closed, and new circulation is started.
Risen the process that case power test bracket tests the case power that rises of coal bin using coke oven tamping tool of the invention are as follows:
(1) bottom plate 7 is mounted on 2 bottom of support frame first, then by each and every one several air bag components 4, soil pressure is installed Pressure cell locating piece 6 and cover board 5 independent assortment of power box sensor are installed on support frame 2, the installation position of pressure cell locating piece 6 It sets with mutual mounting distance in accordance with pre-determined test point, finally by snap ring 3 on support frame 2;
(2) when coal bin side wall close after, by assembled coke oven tamping tool rise case power test bracket be close to coal bin inner wall consolidate Set, then coal, make firm by ramming;
(3) coal dust is made firm by ramming after molding coal bin side wall opens, if coke oven tamping tool rises, be compacted cannot for case power test bracket It directly takes out, then pulls out safety pin 8 and air bag switch lever 1 is pulled to open ball valve 9, pressure-air is made to enter low pressure by high pressure chest Chamber, flexible sheet 10 are heaved, make coke oven tamping tool rise case power test bracket and briquette separation, by coke oven tamping tool rise case power test Bracket takes out.
The main mechanism composition of the present invention and effect:
(1) air bag component 4: when the side plate of coke oven tamping tool coal bin is opened, air bag switch is opened, pressure-air is by high pressure Chamber enters low pressure chamber, and flexible sheet is heaved, and separates bracket and briquette, support frame is facilitated to take out.
(2) cover board 5: can be processed into different size by length, be mounted in the sliding slot of support frame 2, can press two Power box is separated according to certain intervals, to facilitate the case power that rises of test different height;It can also prevent coal dust from entering in support frame, with It prevents from causing adverse effect to test.
(3) pressure cell locating piece 6: fixed and positioned soil pressure cell sensor, metallic channel are pressurized towards support frame, pressure cell Surfaces facing outward installation.
(4) snap ring 3: having certain elasticity, be mounted in the sliding slot of support frame 2 after extruding, screen resilience and sliding slot formed compared with Big frictional force plays fixation balloon component, cover board and pressure cell locating piece.

Claims (4)

  1. The case power test bracket 1. a kind of coke oven tamping tool rises, including air bag switch lever (1), support frame (2), snap ring (3), air bag group Part (4), cover board (5), pressure cell locating piece (6), bottom plate (7), safety pin (8), it is characterised in that: in support frame as described above (2) At least one case force test device that rises is connected by the sliding slot of two sides, the case force test device that rises is by air bag component (4), cover board (5) it forms with pressure cell locating piece (6), is fixed between air bag component (4) and pressure cell locating piece (6) by cover board (5) positioning It connects, the snap ring (3) in sliding slot of air bag component (4) upper end by being mounted on support frame (2) is fixed;The pressure cell locating piece (6) it is provided with soil pressure cell sensor;Pressure cell locating piece (6) lower end is by being mounted on the bottom cover of support frame (2) bottom Plate (7) is fixed;Air bag switch lever (1) top is connect by safety pin (8) with support frame (2), lower part and air bag component (4) Rotating handle (11) connection, rotating handle (11) by ball valve rod (12) connection ball valve (9), ball valve (9) communicated air bags component (4) high pressure chest and low pressure chamber.
  2. The case power test bracket 2. coke oven tamping tool according to claim 1 rises, it is characterised in that: the air bag component (4), The two sides of cover board (5) and pressure cell locating piece (6) are equipped with sliding block, and pass through the sliding slot of sliding block and support frame (2) internal two sides It is cooperatively connected.
  3. The case power test bracket 3. coke oven tamping tool according to claim 1 rises, it is characterised in that: the air bag component (4) High pressure chest be equipped with air bag inflating port (13), low pressure chamber is equipped with flexible sheet (10), and is equipped with air bag gas vent (14).
  4. The case power test bracket 4. coke oven tamping tool according to claim 1 rises, it is characterised in that: when test coal dust is made firm by ramming into Moulded coal case rise case power when, the coke oven tamping tool rise case power test bracket be close to coal bin inner wall;Molding is made firm by ramming when opening coal dust Coal bin side wall, the coke oven tamping tool case power test bracket that rises are compacted when can not directly take out, and the air bag switch lever (1) is logical It crosses and pulls out safety pin (8) pulling opening ball valve (9), pressure-air is made to enter low pressure chamber, bullet by the high pressure chest of air bag component (4) Property diaphragm (10) heave, make coke oven tamping tool rise case power test bracket and briquette separation, take out coke oven tamping tool rise case power test Bracket.
CN201811167194.9A 2018-10-08 2018-10-08 Coke oven tamping tool box expansion force testing support Active CN109297827B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811167194.9A CN109297827B (en) 2018-10-08 2018-10-08 Coke oven tamping tool box expansion force testing support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811167194.9A CN109297827B (en) 2018-10-08 2018-10-08 Coke oven tamping tool box expansion force testing support

Publications (2)

Publication Number Publication Date
CN109297827A true CN109297827A (en) 2019-02-01
CN109297827B CN109297827B (en) 2021-03-05

Family

ID=65161660

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811167194.9A Active CN109297827B (en) 2018-10-08 2018-10-08 Coke oven tamping tool box expansion force testing support

Country Status (1)

Country Link
CN (1) CN109297827B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910214C1 (en) * 1989-03-30 1990-05-31 Saarbergwerke Ag Automatic stroke monitoring during a ramming operation
CN2721643Y (en) * 2004-06-10 2005-08-31 济南钢铁股份有限公司 Coke stamping device for top loaded cokery
CN202671495U (en) * 2012-06-27 2013-01-16 大连华锐重工焦炉车辆设备有限公司 Tamping machine with track leveling devices
CN203683465U (en) * 2013-12-31 2014-07-02 西林钢铁集团有限公司 Maintenance-free iron case for coal blending experiments of coke oven
CN204476941U (en) * 2015-01-30 2015-07-15 常州中铁科技有限公司 A kind of tamping unit intelligent hydraulic testing apparatus
CN106351678A (en) * 2016-09-14 2017-01-25 安徽理工大学 Mine support allowing automatic adjustment of support stiffness
CN206177492U (en) * 2016-10-21 2017-05-17 洛阳理工学院 Measure rock matter country rock lining cutting contact force's pressure cell fixing device
CN207472473U (en) * 2017-11-27 2018-06-08 山东大学 A kind of " sandwich " formula soil pressure cell fixing device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3910214C1 (en) * 1989-03-30 1990-05-31 Saarbergwerke Ag Automatic stroke monitoring during a ramming operation
CN2721643Y (en) * 2004-06-10 2005-08-31 济南钢铁股份有限公司 Coke stamping device for top loaded cokery
CN202671495U (en) * 2012-06-27 2013-01-16 大连华锐重工焦炉车辆设备有限公司 Tamping machine with track leveling devices
CN203683465U (en) * 2013-12-31 2014-07-02 西林钢铁集团有限公司 Maintenance-free iron case for coal blending experiments of coke oven
CN204476941U (en) * 2015-01-30 2015-07-15 常州中铁科技有限公司 A kind of tamping unit intelligent hydraulic testing apparatus
CN106351678A (en) * 2016-09-14 2017-01-25 安徽理工大学 Mine support allowing automatic adjustment of support stiffness
CN206177492U (en) * 2016-10-21 2017-05-17 洛阳理工学院 Measure rock matter country rock lining cutting contact force's pressure cell fixing device
CN207472473U (en) * 2017-11-27 2018-06-08 山东大学 A kind of " sandwich " formula soil pressure cell fixing device

Also Published As

Publication number Publication date
CN109297827B (en) 2021-03-05

Similar Documents

Publication Publication Date Title
CN106198921B (en) A kind of subway shield tunnel construction Disturbance Model experimental rig and its test method
CN109297827A (en) Coke oven tamping tool rises case power test bracket
CN104764677A (en) Method for measuring density of coal pile fed into furnace through simulation of coal loading of coke furnace
CN110534008A (en) The visualization device and method of the compacted process of coral sand densification in a kind of simulation sea reclamation
CN202141719U (en) Soil water characteristic curve tester
CN109540061A (en) A kind of metal lining all automatic measurement instrument
CN110609132B (en) Device and method for measuring physical and mechanical properties of soil along depth distribution rule
CN209570437U (en) A kind of coal and rock three-dimensional fracture test specimen experiment protective device
CN206593974U (en) A kind of boring elastic modulus instrument probe
CN213023014U (en) Automatic test equipment for humidity sensor
CN221148256U (en) Coal-filling material combined sample manufacturing and loading test device
CN107884547A (en) The geotechnical centrifuge case that a kind of remote control simulation tsunami is acted on slight slope
CN208721643U (en) A kind of dosage measurement mechanism of sewage treatment additive
CN210545010U (en) Hydrogen peroxide quantitative adding device
CN211042559U (en) Movable door test force chain distribution test device based on piezochromic material
CN107748117A (en) A kind of powder density on-line measurement device
CN209247571U (en) A kind of powder density on-line measurement device
CN208574954U (en) Bearing blank inner hole automatic detection device
CN117268881A (en) Coal-filling material combined sample manufacturing and loading test device and method thereof
CN207123464U (en) For track road surface soft rock disintegration screening and the test device dried automatically
CN219391610U (en) Testing device for stress wave propagation characteristics of gangue filling bodies with different compaction degrees
CN205910356U (en) Hail feelings monitor
CN216159834U (en) Injection molding part profile tolerance detector
CN109946223A (en) A kind of cassava pulls up the rig for model test of mechanical analysis test
CN218496487U (en) Soil heavy metal nondestructive test device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant