GB 50270-2010 PDF English (GB 50270-1998: Older version)
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Code for construction and acceptance of conveyor equipment installation engineering
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Code for construction and acceptance of continuous conveyer equipment installation engineering
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GB 50270-2010: PDF in English GB 50270-2010
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB 50270-2010
Code for Construction and Acceptance of Conveyor
Equipment Installation Engineering
ISSUED ON: MAY 31, 2010
IMPLEMENTED ON: DECEMBER 1, 2010
Issued by: Ministry of Housing and Urban-Rural Construction of the People’s
Republic of China;
General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China.
Table of Contents
1 General Provisions ... 7
2 Basic Requirement ... 8
3 Belt Conveyor ... 12
4 Slat Conveyor Equipment ... 16
4.1 Slat Conveyer ... 16
4.2 Light-duty Slat Feeder ... 16
4.3 Middle-duty Slat Feeder ... 17
4.4 Heavy-duty Slat Feeder ... 18
4.5 Test Run ... 19
5 Vertical Bucket Elevator ... 20
6 Screw Conveyor ... 25
7 Roller Conveyor ... 26
8 Overhead Conveyer ... 28
9 Vibrating Conveyor ... 32
10 En-masse Conveyer ... 33
11 Pneumatic Conveyor ... 36
12 Mine Hoist & Winch ... 37
12.1 Winding Mine Hoist & Winch ... 37
12.2 Multi-rope Hoist ... 41
12.3 Other Winches ... 43
12.4 Test Run ... 43
13 Acceptance ... 48
Appendix A Belt Connecting Method for Belt Conveyor ... 49
Explanation of Wording in This Code ... 52
List of Quoted Standards ... 53
1 General Provisions
1.0.1 This code is developed in order to improve the construction level of the conveyor
equipment installation engineering, promote the technological progress, ensure the engineering
quality and safety and improve the economic performance.
1.0.2 This code applies to the construction and acceptance of the installation engineering of
belt conveyor, slat conveyor equipment, vertical bucket elevator, screw conveyor, roller
conveyor, overhead conveyor, vibrating conveyor, en-masse conveyer, pneumatic conveyor as
well as mine hoist and winch.
1.0.3 In addition to this code, the construction and acceptance of conveyor equipment
installation engineering still shall be in accordance with those specified in the current relevant
national standards.
4 Slat Conveyor Equipment
4.1 Slat Conveyer
4.1.1 The assembling of frame shall meet the following provisions:
1 The deviation in the horizontal positions of the center line of frame and the longitudinal
center line of conveyor shall not be larger than 2mm.
2 The straightness deviation of the center line of frame shall not be larger than 1/1000.
3 The difference in the length of these two diagonal lines of the cross section of frame
shall not be larger than 1‰ of the average length of these two diagonal lines or 10mm.
4 The deviation in the verticality of the frame to the building floor shall not be larger
than 2/1000.
4.1.2 The assembling of guide tracks shall meet the following provisions:
1 The deviation in the horizontal positions of longitudinal center line between guide
tracks and the longitudinal center line of conveyor shall not be larger than 1mm.
2 The permissible deviation of the track gauge is ±2mm.
3 The joints of guide tracks shall be flat and smooth, their displacement towards right
or left shall not be larger than 0.2mm, and the difference of their height shall not be larger
than 1mm.
4 The gap at joint shall not be larger than 2mm.
5 The guide surface shall be smooth and its verticality deviation shall not be larger
than 10/1000.
4.1.3 The assembling the tension apparatus of cast car type conveyor shall meet the
following provisions:
1 The joint of the traveling rail with the trapped rail shall be flat and smooth, their
offset towards right or left shall not be larger than 1mm, and the difference of height shall not
be larger than 0.3mm.
2 The joint of the traveling guide track with the trapped guide track shall be flat and
smooth, their displacement towards right or left shall not be larger than 0.2mm, and the
difference of height shall not be larger than 1mm.
3 The sliding block of tension apparatus shall match with the slide track well, and their
local gap shall not be larger than 1mm.
4.2 Light-duty Slat Feeder
4.2.1 The deviation in the longitudinal straightness of the main beam of frame shall not be
larger than 1/1000; the difference in the diagonal lines of the frame shall not be larger than
8 Overhead Conveyer
8.0.1 The assembling of metal member shall meet the following provisions:
1 The verticality deviation of the hanger or upright column shall not be larger than
1/1000.
2 The levelness deviation of cantilever shall not be larger than 3/1000.
3 The deviation in the vertical and lateral levelness of the platform shall not be larger
than 3/1000.
4 The offset of the longitudinal center line at the supporting point of track to the
longitudinal center line of conveyor shall not be larger than 3mm.
8.0.2 When laying the track for universal overhead conveyors, the following provisions
shall be met:
1 The straightness deviation of the track within the straight segment shall not be larger
than 3mm within any length of 6000mm and shall not be larger than 7mm within the full
length.
2 The distortion of track within the straight segment shall not be larger 1% of the orbit
altitude within any length of 6000mm.
3 The distortion of vertical curved track shall not be larger than 2% of the orbit
altitude.
4 The distortion of horizontal curved track shall not be larger than 1.5% of the orbit
altitude.
5 The height difference and transverse misalignment of the seating face at joint of track
shall not be larger than 0.5mm.
8.0.3 When laying the track for power and free overhead conveyors, the following
provisions shall be met:
1 The straightness deviation of single straight track shall not be larger than 1.5mm
within any length of 1000mm and shall not be larger than 5mm within the full length.
2 The deviation in the degree of symmetry between the center line of traction rail and
the center line of bearing rail shall not be larger than 1mm.
3 The distortion of straight track, horizontal curved track and vertical curved track at
their both end faces shall not be larger than 1.3% of the orbit altitude.
4 The height difference and transverse misalignment of the seating face at joint of track
shall not be larger than 0.5mm, and the gap at the joint shall not be larger than 1mm.
8.0.4 When laying the track for enclosed-track power and free overhead conveyors, the
following provisions shall be met:
1 The straightness deviation of track shall not be larger than 2.5mm within any length
of 1000mm and shall not be larger than 6mm within any length of 6000mm.
2 The deviation in the degree of symmetry between the center line of traction rail and
the center line of bearing rail shall not be larger than 1mm.
3 The deviation in height of the wheel tread at outlet and inlet of curved track shall not
be larger than 3m.
8.0.5 When laying the track for overhead electrical monorail conveyors, the following
provisions shall be met:
1 The straightness deviation of track shall not be larger than 0.8/1000 and shall not be
larger than 30mm.
2 The verticality deviation of track shall not be larger than 1% of the orbit altitude.
3 The distortion of track in straight segment shall not be larger than 0.5% of the orbit
altitude within any length of 3000mm.
4 The distortion of curved track shall not be larger than 1.5% of the orbit altitude.
5 The misalignment of track at the joint shall not be larger than 1mm and the gap at the
joint shall not be larger than 2mm.
8.0.6 When laying the track for enclosed-track overhead conveyors, the following provisions
shall be met:
1 The straightness deviation of track shall not be larger than 2mm within any length of
1000mm and shall not be larger than 5mm within any length of 6000mm.
2 The distortion of straight track shall not be larger than 1mm within any length of
1000mm and shall not be larger than 3mm within any length of 6000mm.
8.0.7 The assembling of turning device shall meet the following provisions:
1 The permissible deviation for the planeness of the bottom surface of horizontal
curved track within 1000mm shall be ±2mm.
2 The sprocket, smooth wheel and rollers’ group of turning device shall be able to
rotate flexibly without blocking or jamming.
3 The permissible deviation for the distance between the transverse central plane of
sprocket and the bottom surface of track shall be －1.5mm ~ 0.
4 The deviation in the distance between the axial line of sprocket and the longitudinal
center line of track shall not be larger than 1mm.
5 The deviation in the distance between the outer edge of rollers on roller turning
device and the center line of track shall not be larger than 1mm.
8.0.8 The assembling of track switch shall meet the following provisions:
1 The track switch tongue shall be able to rotate flexibly to the right position without
dropping process and shall not be larger than 5mm within the whole travel.
4 The top of drop section shall be firmly connected with the roof truss or truss, the live
rail shall be without shaking, blocking, sliding or loosening phenomenon during the hoisting
and dropping process.
5 The verticality deviation of these two guide tracks of the lifting gear shall not be
larger than 1‰ of the height of guide track.
8.0.12 The deviation in the distance between the guide plate of suspension device and the
center line or surface of track shall not be larger than 2mm; the guide surface shall be flat and
smooth, and the arched parts shall be uniform and smooth.
8.0.13 The assembling of catcher, stopper and brake shall be in accordance with those
specified in the accompanying technical documents.
8.0.14 The no-load test run shall meet the following provisions:
1 The barring or crawling distance shall not be less than 30m, the pull chain shall mesh
with the driving pusher dog well, and the operating pull chain shall be free from blocking and
abnormal noise.
2 The conveyor shall be crawled in advance for at least three times, the running time
shall be lengthened gradually, and the conveyor shall operate stably after running for 2h
continuously without abnormal conditions.
3 The action of emergency parking brake, suspension chain safety catcher and drop
section stop block shall be sensitive, correct and reliable.
8.0.15 The load test run shall meet the following provisions:
1 During the load test run, the conveyor shall be operated for 1h respectively at 1/3, 1/2,
1 and 1.25 times of the rated load.
2 The conveyor shall operate stably without blocking or making abnormal noise.
3 The structure shall be free from obvious deformation and the connection shall be
firm without looseness.
9 Vibrating Conveyor
9.0.1 The assembling of conveyor shall meet the following provisions:
1 The straightness deviation of conveying chute shall not be larger than 3mm within
any length of 1000mm, and the transverse levelness shall not be larger than 1/1000.
2 The flanged connection of conveying chute shall be tight and firm, the misalignment
at the part contacting with material shall not be larger than 0.5mm.
3 The joining parts at material inlet and outlet shall not generate any constrained
vibration.
4 After assembling the supporting spring, its static deformation amount shall not be
larger than 1/10 of the rated amplitude; the installation angle of driving device shall be
consistent with the angle in vibration direction, and the permissible deviation for the phasing
degree of driving device shall be ±1°.
5 The binding bolt shall be installed with black blocking device.
9.0.2 The no-load test run shall meet the following provisions:
1 The conveyor shall be started stably and rapidly with steady vibration but no
horizontal hunting, jumping, impacting or abnormal noise.
2 The deviation in amplitude, vibration direction angle and vibration frequency shall
not be larger than 10% of the rated values; for the vibrating conveyor in length over 15m, the
amplitude deviation of its front, middle and tail sections shall not be larger than 10% of the
rated amplitude.
3 The temperature rise of rubber spring shall not exceed 50℃, the temperature rise of
metal spring shall not exceed 70℃; the temperature rise of the shaft bearing of eccentric-rod
vibrating conveyor and that of motor shall not exceed 50℃; and the temperature rise of
magnet coil shall not exceed 65℃.
9.0.3 The load test run shall meet the following provisions:
1 The fall of amplitude shall not be larger than 10% of the rated amplitude.
2 The materials shall be conveyed fluently in the conveying chute without obvious
blocking, misalignment, swirling or severe material leaping.
12 Mine Hoist & Winch
12.1 Winding Mine Hoist & Winch
12.1.1 When locating the main shaft device, its position shall meet the following provisions:
1 The deviation in the horizontal position of axial line of main shaft shall not be larger
than 0.5‰ of the horizontal distance between the axial line of main shaft and the hoisting
center line of shaft case or the axial line of hoisting sheave.
2 The elevation deviation of the axial line of main shaft shall not be larger than 50mm.
3 The position deviation of the hoisting center line shall not be larger than 5mm.
4 The deviation in the verticality of the axial line of main shaft with the hoisting center
line shall not be larger than 0.15/1000.
12.1.2 The device for main shaft shall be assembled according to the stamps of the maker.
12.1.3 The installation levelness of the bearing seat shall be detected by setting level meter
along the direction of main shaft, the reading of this level meter shall not be larger than
0.1/1000; another level meter shall be set in a direction perpendicular to the direction of main
shaft, and its reading shall not be larger than 0.15/1000; the bearing seat shall be installed by
closely contacting with the bearing beam, and no filling piece can be padded between them.
12.1.4 The bearing bush shall contact the bearing seat well.
12.1.5 The installation levelness of the main shaft of winding drum shall be detected with
level meter, the reading of this level meter shall not be larger than 0.1/1000, and the end of
coupling should be lower a little.
12.1.6 When assembling the main shaft, the shaft neck and bearing bush shall be in
accordance with the following provisions:
1 The contacting angle of the neck of main shaft with the lower bearing bush should be
90°~120°, the contact length along the axial direction shall not be less than 3/4 of the length
of the bearing bush , and the contact points within any area of 25mm×25mm within the
contact scope shall not be less than six.
2 The top gap between the neck of main shaft and the bearing bush shall be in
accordance with those specified in Table 12.1.6; and the side gap at both sides should be
50%~75% of the top gap.
3 The gap between bearing bush and shaft shoulder shall comply with those specified
in the accompanying technical documents.
in the diameter of the two winding drums, when hoisting with two winding drums, shall not
be larger than 2mm.
5 Installation of plastic gasket shall comply with those specified in the accompanying
technical documents.
12.1.13 Installation of retarder shall meet the following provisions:
1 The vertical and transverse installation levelness of the retarder shall be detected
with level meters, and the readings of level meter all shall not be larger than 0.15/1000.
2 The inner part of retarder shall be cleaned and shall be free from any dirt.
3 The designation and amount of the lubricant applied in the retarder shall comply with
those specified in the accompanying technical documents; when adopting circulating lubrication
for the retarder, the connection of its lubrication circuit shall meet the specifications.
4 The retarder shall be tight with no oil leakage at its joint surface.
12.1.14 The back lash and contact pattern of exposed gear shall comply with those specified
in the accompanying technical documents.
12.1.15 The installation of coupling shall meet the provisions of accompanying technical
documents; and it shall comply with the relevant regulations specified in the current national
standard “General Code for Construction and Acceptance of Mechanical Equipment Installation
Engineering” GB 50231 if no provision is provided.
12.1.16 The oil pumps, valves, internal and external oil pipes and oil tanks of the hydraulic
station shall be cleaned and shall be free from oil leakage after being assembled.
12.1.17 The oil for hydraulic station shall comply with those specified in the accompanying
technical documents, and the cleanness of hydraulic oil shall be in accordance with the
requirements of hydraulic system.
12.1.18 The magnetic steel devices in the electrohydraulic pressure regulation appliance
shall not be beaten, and they should not be dismantled and shall be protected against loss of
excitation.
12.1.19 The assembling depth indicator shall meet the following provisions:
1 The driving axle shall be level and the gear meshing shall be in good condition.
2 The throw of pointer shall be larger than two-thirds of the measurement range of
indicator board; the moving pointer shall not impact with the indicator board, and the driving
device shall be flexible and reliable.
3 Before assembling the lead screw, its straightness shall be inspected and its full
length shall not be larger than 1mm.
4 The assembling of the circular disc depth indicator and its driving device shall be
correct, the depth indicator and its driving device shall be able to rotate flexibly and stably.
5 The joist of the driving device of memorial archway depth indicator shall be loaded
4 The deviation in the central distance between two adjacent rope grooves shall not be
larger than 1.6mm.
5 The diameter of the bottom circle of each rope groove shall be measured by hanging
rope, and the difference in the maximum and minimum measured values shall not be larger
than 0.5mm.
6 In addition the special oil for increasing the friction coefficient, no other oily
materials shall be contacted with the surface of friction lining.
12.2.6 The installation of retarder shall be in accordance with those specified in Article
12.1.13 of this code, and the installation of that retarder on the foundation of central driving
spring still shall be in accordance with the following provisions:
1 The installation of the foundation springs of retarder shall be carried out according to
the numbers specified by the manufacturer.
2 The retarder shall be placed on the foundation springs, right amount of lubricant shall
be applied onto it, the axial line of its output shaft shall be higher than that of the main shaft
by 0.5mm, loads shall be applied to the output shaft to drop it by 0.5mm; thereafter, the solid
coupling shall be assembled according to the marks made by the manufacturer, and the
assembling deviation shall be in accordance with those specified in the accompanying
technical documents, the end clearance between two half-couplings should be 0.30mm~0.50mm,
and no gap will be left after tightening up the bolts.
3 After connecting the retarder with the main shaft device, the main leading wheel
shall be rotated by one circle, the retarder body shall be measured at the point where is
farthest away to the solid coupling, and its deflection along the axial direction and radial
direction shall not be larger than 0.15mm.
4 The vertical and lateral levelness of the retarder shall not be larger than 5/1000.
12.2.7 The deviation in the installation of guide wheel shall meet the following provisions:
1 The position deviation between the symmetrical center line of guide wheel devices
and the center line of the main leading wheel shall not be larger than 1 mm.
2 The position deviation in the horizontal plane between the axial line of guide wheel
and the installation reference line shall not be larger than 2mm.
3 The parallel misalignment between the axial lines of guide wheel and main shaft in
the horizontal plane shall not be larger than 0.3/1000.
4 The levelness deviation of the shaft of guide wheel shall not be larger than 0.2/1000.
12.2.8 The deviation in the installation of the vehicle groove shall meet the following
provisions:
1 The levelness deviation shall not be larger than 0.2/1000.
2 The deviation between the horizontal positions of the symmetrical center line and the
1 The pressure fall of the oil pressure or air pressure of system within 10min shall not
be larger than 0.02MPa.
2 The operation of handhold for working brake and safety brake shall be flexible,
correct and reliable.
3 When braking, these two auxiliary brakes on the winding drum shall act simultaneously,
the contact between brake shoe and brake wheel shall be well and stable; the contact of each
brake shoe with the brake wheel in the directions of length and width shall not be less than
80% of the dimension of this brake shoe.
4 When the oil pressure or air pressure of the system is higher than the rated pressure
by 0.1MPa, the safety valve of the protective system shall be able to act timely.
5 The pressure regulator, signal and alarm bell devices shall be able to act accurately.
6 The fluctuation range of the oil pressure of accumulator shall not be larger than
0.05MPa.
12.4.4 Debugging of disc braking system shall meet the following provisions:
1 Debugging of the hydraulic station shall be in accordance with those specified in the
accompanying technical documents.
2 Air in the hydraulic pipeline of braking system shall be wholly discharge.
3 The contact area of each brake shoe shall not be less than 60% of its braking surface.
4 When the braking handle is at the full braking position, the current of the electro-
hydraulic pressure regulation appliance shall be similar to zero, and the residual pressure shall
be less than 0.5MPa.
5 When the braking handle is at the full declutching position, the current of electro-
hydraulic pressure regulation appliance shall be equal to the corresponding current value of
working pressure, and the pressure shall be equal to the working pressure determined with the
actual applied load.
6 When the braking handle it at the middle position, the current of electrohydraulic
pressure regulation appliance should be half of the current value corresponding to the
maximum working pressure that is determined with the actual applied load, and the pressure
should be half of the working pressure as determined with the actual applied load.
12.4.5 Debugging of the adjusting rope device shall meet the following provisions:
1 The rope-adjusting clutch shall be reset with spring, and all the springs shall be
stressed uniformly.
2 The interlocking device shall be flexible and reliable.
3 The rope-adjusting clutch shall be able to act flexibly at various locations.
4 These three air cylinders or oil cylinders of the clutch shall act uniformly without air
or oil leakage.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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