This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, packaging, transportation and storage of industrial dehydrators (hereinafter referred to as dehydrators). This standard applies to centrifugal dehydrators for various cotton, linen, chemical fiber, wool and other fabrics and blankets. This standard does not apply to semi-automatic and fully automatic industrial washing machines with dehydrator functions. It does not apply to dehydrators with other mechanisms such as microwaves or vacuum. This standard should be used in conjunction with JB7833-1995 "Safety Requirements for Industrial Dehydrators". JB/T 7819-1995 Industrial Dehydrator JB/T7819-1995 Standard download decompression password: www.bzxz.net

1 Subject content and scope of application
Machinery Industry Standard of the People's Republic of China
Industrial dehydrator
JB/T7819-1995
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, packaging, transportation and storage of industrial dehydrators (hereinafter referred to as dehydrators).
This standard applies to centrifugal dehydrators for various cotton, linen, chemical fiber, wool and other fabrics and blankets. This standard does not apply to semi-automatic and fully automatic industrial washing machines with dehydration function. It does not apply to dehydrators with other mechanisms such as microwave or vacuum.
This standard should be used in conjunction with JB7833-1995 "Safety Requirements for Industrial Dehydrators". 2 Reference standards
GB10894-89
GB335-85
GB411-78
JB7833-1995
3 Types and basic parameters
3.1 Type
Determination of sound power level of separation machinery noise Engineering method TGT type stalk
Technical requirements for printing and dyeing cotton cloth
Safety requirements for industrial dehydratorswww.bzxz.net
3.1.1 Dehydrators are represented by the Chinese phonetic letter "T". 3.1.2
Industry is represented by the Chinese phonetic letter "G". Design serial number
The first design is represented by the letter A;
The second modified design is represented by the letter B;
The third modified design is represented by the letter C;
The following, and so on.
3.2 Basic parameters
3.2.1 Specifications of dehydrator
Specifications of dehydrator Rated dehydration capacity standard load cloth is expressed by the weight of dry fabric. Its specification value is determined according to the design and is marked on the product nameplate and written in the product manual. 3.2.2 Power supply
Rated voltage: AC380V;
Rated frequency: 50Hz.
3.3 Rotary drum volume
The volume of the rotary drum of the dehydrator should be able to put the soaked rated dehydration capacity standard load cloth in at one time without exceeding the upper edge of the rotary drum. 3.4 Model and meaning of dehydrator
Approved by the Ministry of Machinery Industry on November 24, 1995
Implemented on July 1, 1996
Example: TG-50A
JB/T7819-1995
口0口口
Design serial number, indicated in accordance with Article 3.1.3
Specification, indicated in accordance with Article 3.2.1
Series code of daily-use electrical appliances, indicated in accordance with Article 3.1.2Class code of daily-use electrical appliances, indicated in accordance with Article 3.1.1Indicates: 50kg industrial dehydrator designed for the first time. If there are special functions or special structures, the codes of special functions or special structures can be added after the design serial number. Technical requirements
4.1 Dehydrators shall comply with the requirements of this standard and JB7833-1995, and shall be manufactured in accordance with the technical documents and drawings approved by the prescribed procedures. 4.2 Applicable environmental conditions for dehydrators
Altitude shall not exceed 2500m;
Ambient temperature shall be 0～+40℃;
c. When the ambient temperature is 25℃, the relative humidity of the air shall be below 95%. 4.3 Fabric moisture content
The moisture content of the fabric after dehydration by the dehydrator shall be measured according to the method specified in Article 5.3, and its moisture content H shall not be greater than 70%. 4.4 Vibration
When the dehydrator is running at rated conditions, its vibration speed shall not be greater than 7.1mm/s. 4.5 Noise
The noise of the dehydrator, at rated conditions, its sound power level (A-weighted) noise value shall not be greater than that specified in Table 1. Table 1
Rated dehydration capacity
Sound power level (A-weighted) Noise
10≤G≤30
30If (LP+N)L≤10dB, no correction is required; if (LP+N)L≤10dB, correction is made according to Figure 3. (N
5.5.3 Calculation of sound power level noise
JB/T7819-1995
(Lp+NL)
Figure 3 Correction of background noise effect
Lp=(LP+N）-ALN
Lw= (Lp-2) +10 ig %
Wherein: Lw—industrial dehydrator sound power level (A-weighted) noise value, dB; Lp
industrial dehydrator sound pressure level (A-weighted) noise average value, dB; S-—envelope area of ​​the industrial dehydrator under test, m\; So-—reference plane, So=1m.
The length, width and height of the industrial dehydrator body are l, l, and 1s, m; +d
d=lmS=4ab+bc+ac)
The measured sound power level (A-weighted) noise value shall comply with the provisions of Article 4.5. 5.6 Determination of power consumption ratio
Industrial dehydration machine is under rated condition. Use three-phase watt-hour meter and timer. Start timing from the start of temperature rise test and record the three-phase watt-hour meter number at the same time. When it reaches 30min, record the number of the three-phase watt-hour meter immediately. The difference between the two is the power consumption, which is converted into power consumption per hour kw.h.
Where: Q—power consumed by dehydrating unit fabric weight, kW·h/kgG,—weight of fabric before immersion after drying, kg. It should meet the requirements of Article 4.6.
5.7 Appearance inspection method
Use visual inspection to meet the requirements of Article 4.8. 5.8 Unbalanced operation test
Industrial dehydration machine is under rated condition. Put the standard load cloth or simulated load of 5% rated dehydration capacity around the rotor for operation test. During the test, it should meet the requirements of Article 4.9. 5
6 Inspection rules
JB/T7819-1995
6.1 The inspection of industrial dehydrators is divided into factory inspection and type inspection. 6.1.1 Factory inspection
Before each industrial dehydrator leaves the factory, it must be inspected according to items 1, 8, 9, 10, 14 and 15 specified in Table 3. And keep records of factory inspection.
Type inspection
Industrial dehydrators should be subject to type inspection in any of the following situations: trial production inspection of new products and old products transferred to the factory for production; b.
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, an inspection should be carried out periodically after a certain amount of production has been accumulated; after the product is discontinued and production is resumed;
When there is a major abnormality between the factory inspection results and the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. Type inspection shall include all items specified in this standard and JB7833. Sampling plan for type inspection
The samples for type inspection shall be randomly selected from the products that have passed the factory inspection; for specifications with a rated dehydration capacity of 30kg and less than 30kg, 3 units shall be randomly selected. For specifications with a rated dehydration capacity greater than 30kg, 1 unit shall be randomly selected. Each unit shall be inspected according to all the items specified in Table 3. Table 3
Test items
Appearance inspection
Fabric moisture content
Power consumption ratio
Unbalanced operation
Starting performance
Braking performance
Grounding performance
Separation factor
Leakage current
Insulation resistance
Electrical strength
Continuous operation
Judgment rules||tt ||Chapter of this standard
Technical requirements
Test methods
Chapter of JB7833
Safety requirements
Test methods
After the industrial dehydrator is inspected, if one item of the safety requirements in Table 3 fails, the batch of products shall be deemed unqualified. For other items in Table 3, if two items fail, the batch of products shall be deemed unqualified. If only one item fails, the unqualified item can be retested twice. If one item still fails, the batch of products shall be deemed unqualified; if the retest is qualified, the batch of products shall be deemed qualified.
6.4 The validity period of the type test report is 18 months. 7 Packaging, transportation and storage
7.1 Packaging
7.1.1 The industrial dehydrator should be packed in a firm packing box, or packed according to the user's requirements. The box should be properly padded and have moisture-proof protection measures.
7.1.2 Before packing, the machine surface should be cleaned and some metal surfaces should have rust-proof protection measures. 7.1.3
The packing box should ensure that the industrial dehydrator will not be damaged due to loading and unloading, vibration, moisture, etc. under the conditions of storage, transportation and storage. The outer surface of the packing box should be clearly marked with:
Product name;
Product trademark;
Product model;
Net weight, kgs
Gross weight, kg:
External dimensions: length×width×height, mm;
With upward mark
Shipping unit and shipping station (port);
Receiving unit, address and destination station (port).
The technical documents and attachments that should be accompanied by the product are as follows: Product certificate;
Product instruction manual;
Product installation foundation map;
Warranty card,
Random accessories and lists;
Other necessary technical information.
7.2 Transportation
During transportation, the product should be protected from rain, snow, exposure to the sun, collision and inversion. It should not be stored and transported together with corrosive substances. 7.3 Storage
7.3.1 After the industrial dehydrator is packed, it should be stored in a ventilated room. If it is stored in the open air, it must be 15cm high and have measures to avoid rain and snow.
7.3.2 It must not be stored together with corrosive substances. 7.3.3 If the storage period exceeds half a year, it should be unpacked and rust-proofed. Additional remarks:
This standard is proposed and managed by the Guangzhou Electric Science Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Guangzhou Electric Science Research Institute of the Ministry of Machinery Industry. Drafter of this standard: Sun Xianglin.
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