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ICS91.110
Construction Industry Standard of the People's Republic of China JG/T114—1999
Squeezer of concrete hollow slab
1999-11-05 Issued
2000-06-01 Implementation
Issued by the Ministry of Construction of the People's Republic of China
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JG/T114—1999
Construction Industry Standard of the People's Republic of my country JG/T114—1999
Concrete hollow slab extrusion machine is a concrete precast component forming equipment independently developed and researched in China. There is no similar standard abroad. During the preparation process, the main contents of the industry standard JG/T103~105-1999 "Classification, Technical Conditions and Test Methods of Prestressed Concrete Hollow Slab Extruders" (i.e. ZBP95001.1~95001.3-89) were referred to. There are two main types of pushers: external vibration type and internal vibration type. . The technical parameters of the internal vibration pusher
machine are still to be verified, and are not specified in this standard for the time being. Appendix A of this standard is a prompt appendix.
This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the Beijing Construction Machinery Comprehensive Research Institute, a mechanical equipment and vehicle standard technical unit of the Ministry of Construction.
The drafting units of this standard: Jiangsu Academy of Building Science, China Academy of Building Science Building Mechanization Branch, Henan Liaoyuan Group Corporation, Rudong Jinghai Machinery Factory The main drafters of this standard: Zhang Qingguang, Fu Liugen, Li Guochen, Liu Feng. Engineering Construction Standard Full Text Information System
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Construction Industry Standard of the People's Republic of China Squeezing Machine for Concrete Hollow Slab
Squeezer of Concrete Hollow Slab Scope
JG/T114—1999
Classification, technical requirements, test methods, inspection rules, marking, packaging and storage of Squeezing Machine for Concrete Hollow Slab (referred to as Squeezing Machine). This standard applies to Squeezing Machine for Concrete Hollow Slab. It can be used as a reference for various molding equipment that produces concrete columns, beams, beams and blocks by the extrusion method. Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB14040—1993 Prestressed concrete hollow slab JG/T5011.4—1992
Construction machinery and equipment
This condition
JG/T5011.5—1992
: Construction machinery and equipment
Technical conditions
JG/T5011.8—1992
JG/T5011.10—1992
Construction machinery and equipment
General technical conditions for gray cast iron parts
General technical conditions for ductile iron parts
General technical conditions for forgings
Construction machinery and equipment
General technical conditions for machined parts
Approved by the Ministry of Construction of the People's Republic of China on November 5, 1999, Engineering Construction Standard Full-text Information System
Implementation on June 1, 2000
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JG/T5012—1992
General technical conditions for packaging of construction machinery and equipment JG/T5082.1—1996 General technical conditions for welded parts of construction machinery and equipment 3 Classification
3.1 Model
The model of the pusher consists of group, type, characteristics, main parameters and updated variant code. Explanation is as follows:
printed) A, B, C represents
main parameter code: (hollow plate height X mark width) × 10, cmXcm
characteristic code: single block type without marking
S-double block type
N-internal reporting type
group code: pusher
3.2 specification series
3.2.1 the main parameters of the pusher are jointly represented by the height of the hollow plate and the mark width. Main parameter series are shown in Table 1
Main parameter series
Hollow plate height
Marking width
3.2.2 Basic parameters of external vibration pusher are shown in Table 2.2
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Main parameter code
Transmission power
Vibration power
Forming speed
Marking example
12×50
Basic parameters of external vibration pusher
12×60
12×90
12×120| |tt||18×60
18×90
18×120
a) Hollow slab height is 120mm, mark width is 600mm, external vibration double-block pusher:
Concrete hollow slab pusher TWS12X60JG/T114b) Hollow slab height is 180mm, mark width is 900mm, external vibration single-block, second-modified pusher:
Wet-setting ten hollow slab pusher TW18×90BJG/T114Technical requirements
General requirements
4.1.1 The pusher shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.1.2 Under the conditions of ambient temperature 5℃～40℃ and power supply voltage (380±20)V, the pusher shall be able to produce continuously and normally on a pedestal that meets the relevant regulations. 4.1.3 The electronic control device should be safe and reliable, and should have good vibration isolation, fire prevention, rain protection and dust prevention measures. The electrical components in the box should be arranged neatly and the wiring should be clear. 4.1.4
The transmission mechanism must be well lubricated, flexible in operation, and without abnormal noise during operation. Gray cast iron parts should comply with the provisions of JG/T5011.4; ductile iron parts should comply with the provisions of JG/T5011.5, forgings should comply with the provisions of JG/T5011.8, machined parts should comply with the provisions of JG/T5011.10, and welded parts should comply with the provisions of JG/T5082.1. 4.1.6 The exposed surface of the processed parts should be treated with rust prevention. 4.1.7 The raw materials, standard parts and matching parts used should comply with the relevant standards. 3
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4.1.8 Product signs should be clearly written, firmly and properly installed, and should not have defects such as scratches, paint peeling, and hammer marks.
4.1.9 The paint layer of the machine body should be firm and uniform in color, without obvious flow marks, peeling, wrinkling, adhesion of impurities and other defects.
4.2 Performance requirements
4.2.1 The quality and performance of the hollow slabs produced by the pusher shall comply with the relevant provisions of GB14040.
4.2.2 Within the 200h operating time of the pusher, the average trouble-free working time shall not be less than 120h, and the reliability shall not be less than 85%.
4.2.3 The noise at the driver's ear of the pusher shall comply with the provisions of Table 3. When the noise is greater than 90-dB(A), the operator shall be equipped with corresponding protective equipment. Table 3 Noise
Vibration frequency
≥45~75
≥75~125
When the pusher is working, the amplitude of the vibration base plate should be symmetrical on both sides parallel to the center axis of the frame, and the amplitude deviation rate should not be greater than 20%. 4.2.5
The vibration source and the frame should be isolated from vibration. When the pusher is working, the amplitude of the forced vibration of the frame is not greater than 0.25A (A is the average amplitude of each vibration point of the vibration base plate). The pusher should be able to restart normally after stopping for 10 minutes during operation. 4.2.6
The vibrator should be able to meet the requirements of 3 production cycles, and each production cycle should be stopped for 0.3 hours after continuous operation for not less than 1 hour.
When the reducer runs for 1 hour under rated load, the temperature rise of the lubricating oil shall not exceed 40℃. The oil-immersed lubrication and hydraulic components shall not leak oil. There should be no more than three oil leakage points. The insulation resistance of the electrical system to the whole machine shall not be less than 0.5MQ. 4.2.10
The gap between the vibrating base plate and adjacent parts shall not be greater than 3mm. The parallelism tolerance between adjacent core tubes is 1.5mm. The flatness tolerance of the core tube group is 2mm.
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4.2.14 The parallelism tolerance between the core tubes on both sides and the adjacent side templates is 2.5mm. 5 Test method
5.1 Test conditions
5.1.1 Test conditions
a) The test should be carried out continuously;
b) The concrete strength grade of the hollow slab produced by the prototype machine is C30, and the raw materials of the concrete should comply with the provisions of GB14040.
5.1.2 The ambient temperature during the test is 5℃～40℃; the power supply voltage is (380±20)V. 5.1.3 The test results are recorded in the table of Appendix A (Suggested Appendix). 5.2 The test items and methods for the quality and performance determination of the main concrete hollow slab shall be carried out in accordance with the provisions of GB14040. 5.3 Determination of molding speed
5.3.1 Test instruments and tools:
a) Stopwatch;
) Steel tape measure.
Use a stopwatch to record the length of the hollow slab produced continuously within 30 minutes and calculate the molding speed of the prototype.
5.4 Reliability test
5.4.1 Fault classification
Product failures are classified into four categories: mild, general, severe and fatal failures according to factors such as personal safety, degree of damage to parts and components, degree of functional degradation and ease of repair. See Table 4. 5
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Fault Category Fault Name
Fatal Fault
Table 4 Fault Category
Fault Characteristics
Fault Example
Seriously endangering or causing personal injury or death,
Serious motor burnout of important assemblies or main components, frame fracture and damage, causing major economic losses
Seriously affecting product functions, the machine must be stopped for repair, and external important parts must be replaced
Serious Fault
Parts or the machine body must be disassembled to replace the damaged parts of the internal reducer gear, the repair time is long (more than
h), the maintenance cost is high
Significantly affecting the main performance of the product.
Must stop for inspection and repair, generally only need to replace or repair external parts for serious leakage, weld cracking, general fault
. Burned electrical switches and squeezed screws can be repaired in a short time (about 1.5 hours) with random tools, with medium cost. Slightly affecting product functions, there is no need to stop the machine to replace or repair parts. Slightly faulty oil seepage, loose bolts, (QD) tools can be used to eliminate faults in a relatively short time (about 20 minutes) with low cost. Mean time between failures and reliability (MTBF) See formula (1) MTBF= Where: t-Criticality coefficient e-Accumulated working time of the machine (excluding the prescribed maintenance time), h; The number of equivalent failures that occur within the prescribed reliability test time, see formula () Where n-The number of occurrences of the i-th type of fault; The criticality coefficient of the i-th type of fault.
660060600600006600
When <1, let =1, but the number of minor faults should be stated in the test report;
b) Reliability (R) see formula (3):
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R=t/(t+t)X100%
-The total time to repair the fault (excluding the prescribed maintenance time), h. In the formula: t-
5.5 Vibration parameter determination
5.5.1 Test items
a) Amplitude and amplitude deviation rate of the vibration base plate; b) Amplitude of the frame.
5.5.2 Test instrument
Amplitude measuring instrument
5.5.3 Test requirements
a) Test under test conditions;
b) The number of test points each time is an even number, and they are arranged symmetrically based on the longitudinal center line of the fuselage; c) After the vibrator starts to vibrate, make test records during the stable working stage. 5.5.4 Measurement point arrangement
a) 46 measurement points are symmetrically and evenly distributed on the vibration base plate at a distance of 10 mm from the edge; 6 points are taken on the racks on both sides of the side template outlet.
The calculation of the amplitude deviation rate is shown in formulas (4) and (5), and the maximum value in the results is the amplitude deviation rate of the prototype.
In the formula: F, F2
1Am=4l×100%
-Amplitude deviation rate:
A,——the average amplitude of each group of measuring points, mm; Amex
-the maximum amplitude of each group of measuring points, mm; the minimum amplitude of each group of measuring points, mm. 5.6 Noise measurement
5.6.1 Test instruments and tools
a) Sound level meter ("A" weighted network sound pressure level); b) Steel tape measure.
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**** (5)
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5.6.2 Test requirements
The test site is centered on the prototype. There should be no large reflectors within a radius of 25m, and the background noise must be 10dB (A) lower than the prototype noise. 5.6.3 Test method
Place the sound level meter 1m in front, back, left and right of the prototype, and measure four points 1.5m above the ground.
5.7 Determination of insulation resistance
5.7.1 Test instrument
500V megohmmeter.
5.7.2 Test method
a) Test before prototype operation
b) Stop the machine for test after producing more than 30m of hollow slab under test conditions. 5.8 Determination of shutdown and restart capability
5.8.1 Test instrument
Test method
After the machine is in normal production for 10min, stop it for 10min and then restart it. 5.9
Determination of the working temperature rise of the reducer lubricating oil
5.9.1 Test tools
Point thermometer
5.9.2 Test method
Measurement of the lubricating oil temperature rise in the reducer b) After the prototype has worked for 1 hour, stop the machine and measure the temperature of the lubricating oil in the reducer. 5.10 Determination and observation of oil seepage and leakage of reducer and hydraulic system: For oil-immersed lubrication system, if more than one drop leaks out every 10 minutes, it is oil leakage; if it does not exceed one drop, but oil can be felt by hand, it is oil seepage; for hydraulic system, if more than one drop leaks out every 3 minutes, it is oil leakage; if it does not exceed one drop, but oil can be felt by hand, it is oil seepage. 5.11 Determination of the gap between vibration base plates
5.11.1 Test tools
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feeler gauge.
5.11.2 Test method
Before the prototype is put into operation, use a feeler gauge to check the gap between the vibration base plate and the surrounding adjacent parts. 5.12 Determination of parallelism between core tubes, flatness of core tube assembly and parallelism between core tube and side template
5.12.1 Test tools
a) Vernier caliper;
b) Caliper;
c) Steel ruler.
5.12.2 Test method
a) Measure the distance between adjacent core tubes (at the tail end and near the pushing plate, the pushing plate should be at the closest tail end);
b) Measure the distance between each core tube and the upper surface of the frame; c) Measure the distance between the core tubes on both sides and the adjacent side templates (measure one point at the tail end of the core tube and near the pushing plate.
Inspection rules
Factory inspection
6.1.1 Before leaving the factory, the product must be inspected by the factory quality inspection department one by one, and the product certificate will be issued after confirmation of compliance.
6.1.2 See Table 5 for factory inspection items.
6.1.3 For key items that are all qualified, Products that meet four general items are qualified products. 6.2
Type inspection
Type inspection should be carried out in any of the following situations: # Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in design, process, and materials, which may affect product performance;
c) When the product is discontinued for more than two years and production is resumed; d The factory inspection results are significantly different from the previous type test results: 9
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e) The national quality supervision agency proposes a type inspection requirement. 6.2.2
Type inspection items are shown in Table 5.
Inspection items
Technical requirements
Inspection items
Forming speed
Hollow slab quality
Mean trouble-free working time and reliability
Amplitude deviation rate
Insulation resistance of electrical system
Gap around vibration base
Parallelism of core tube
Flatness of core tube assembly
Parallelism between core tube and side template
Electronic control device
Operation performance of transmission mechanism||t t||Quality of casting, forging, welding and processing parts
Exposed surface of soil-added parts
Quality of raw materials and purchased parts
Paint quality
Continuous working capacity of vibrator
Vibration isolation effect
Temperature rise of reducer lubricating oil
Oil leakage
Restarting capacity
The sampling and judgment rules are as follows:
Factory inspection
Type inspection
Randomly select one unit from the inventory (or on-site use) of more than five units for inspection. For Guan 10
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