1 scope
The technology standard is applicable to resistance, resistance, resonant muffler production and installation works.
2 construction preparation
2.1 material requirements and main machines:
2.1.1 all sorts of plank, sections should have qualified certificate or leaving the qualification documents.
2.1.2 in addition to the above documents, should be a visual inspection. Plate surface should be smooth, uniform thickness, convex concave and crushed phenomenon obviously, and can not have crack, delamination, corrosion and pitting. Steel should be such as type, there should be no crack, scratch, pitting and other quality defects.
2.1.3 sound-absorbing material selection should be in strict accordance with the design requirements, and meet the requirement of fire prevention, moistureproof and corrosion resistance.
2.1.4 other materials can not be caused by a flawed reduce the strength of the finished product or affect the use effect.
2.1.5 longmen plate shears, oscillating curve shearing machine, manual electric cutting and chamfering machine, nip machine, machine, bite compactor, joint machine, steel cutting machine, punching machine, bench drill, drill, hydraulic rivet pliers, electric pull riveting gun, air compressors, airbrush, steel ruler, square, protractor, cross gauge, row needle, the blunt, hammers, wooden hammer, clappers, pulley, chain hoist, wire rope, adjustable wrench, pliers, screwdriver, hacksaw, hammer, steel tape, spirit level, etc.
2.2 operation conditions:
2.2.1 should have capacious, bright, ground level off, clean workshop.
2.2.2 job site must have the machine that could satisfy the requirement of processing technology, facilities, power supply, security protection equipment and fire equipment.
2.2.3 muffler production should be carried out in accordance with the design drawings and the requirements of the standard drawing, and the builder written disclosure quality, technology, and safety.
2.2.4 muffler as applied to the production of materials, should comply with the regulations of design of fire prevention, anti-corrosion, moisture-proof and health requirement.
3 operation process
3.1 process:
Shell lofting - shear, gaunt, fold the side - forming
Acquisition and feed to welding, punching, drilling flange
Silencing slice of blanking to fill the anechoic material, binding with wrapping material
- assembly - flange riveting to finished goods inspection to the factory, installation, test
3.2 muffler production. All kinds of sheet metal processing machinery processing should be adopted, such as shearing, folding, folding, bite, etc., do a molding, reduce manual operation. Galvanized steel construction, attention should be paid to that the zinc coating are not destroyed, as far as possible the bite or riveting.
3.3 muffler framework should be solid, shell leakage is not allowed. Muffler pipe, tube, plate, plate making, flange production and riveting required reference 4.1 content, etc.
3.4 resistance muffler (figure 4-28) in the processing, the internal size cannot be changed. Its resistance silencing slice (figure 4-29) is made from wood reinforced wooden frame (such as the design requirements with metal structure, according to the design requirements for processing), fill in superfine glass wool sound-absorbing material, such as outsourcing glass cloth such as wrapping material. When filled with sound-absorbing material, should according to the design of unit weight, thickness requirements laid evenly, cover shall not be damaged. Binding sound-absorbing board, parts contacted with air bubble nails, painted with the rest of the nail with the binding. Nail, nail bubble in the bubble nail add a layer of gaskets, can reduce the damage phenomenon. For larger volume of sound absorption, to prevent the sound-absorbing material caused by muffler installation or mobile sinks, can be installed within the vessel proper baffle. 3.5 resistant muffler figure 4-30 is the use of the pipe cross section mutation, silencing effect. When processed, can not arbitrarily change the size of the expansion chamber.
3.6 a resonant muffler (figure 4-31) production should be according to the design requirements for processing. Can not arbitrarily change the size of the key parts. Perforated plate aperture and perforation rate should comply with the design requirements. Perforated plate after rushed, drill hole, orifice burr should be smooth. The partition size should be correct, partition of resonant cavity plate joint should be close to with wall.
3.7 (figure 4-32) impedance compound muffler assembly, should be made of round nails to silencing staples into silencing pills group, at the same time with the rivet transverse diaphragm and riveting tube section, then the paragraphs with a round head wood screw tube fixed to the silencing slice group, then the pipe and horizontal clapboard, and muffler on both ends of the cover plate, plate and tube with oval head self-tapping screws, finally flange rivet at both ends.
3.8 muffler duct, silencing plenum and semi-anechoic elbow silencing of lining material shall be uniform tiejin, cannot fall off, and flat-fell seam to dense, smooth surface, cannot be uneven.
Anechoic material covering 3.9 muffler shall not be damaged, lap joint should be suitable airflow, and the interface can not have burrs. Inside the muffler directly face fabric should have protection against the wind.
Silencing bend flat side length is greater than 3.10 800 mm, should be added a diversion absorption. Diversion absorption surface should be smooth, uniform circular arc, closely firmly connected to the pipe bending. Can not have loose phenomenon.
3.11 muffler shutter, framework should be solid, blade distance should be uniform, sound absorption surface direction should comply with the design requirements.
3.12 muffler metal components inside and outside surface should besmear brushs red lead paint two high-quality galvanized plate (not painted anticorrosive paint). Before coating, metal surface should be in accordance with the need to be processing, remove rust, grease and other sundry. No leakage requirement when brushing besmear, blister, grinning.
3.13 after assembly of finished products shall, in accordance with requirements of the design documents and construction acceptance specifications, products meet the requirements before leaving the factory.
3.14 muffler, muffler elbow when installation should be set separately, hanger, make duct don't bear its weight.
Steam-water 3.15 should be according to the type, specification and the structure of the muffler structure situation, selected in accordance with the provisions of national standard or design drawings. Muffler should check before installation, hanger fixed position is correct, such as embedded parts or whether the expansion bolt installation is firm and reliable. , hanger must guarantee to load.
3.16 muffler, hanger in the screw hole distance of iron on the wear derrick, should be slightly wider than the muffler 40 ~ 50 mm. In order to facilitate adjustment elevation, but at the end of boom set of 50 ~ 60 mm thread, in order to leveling and alignment. Can also be used in the method of the padded on the iron, leveling, alignment.
3.17 installation direction of the muffler must be correct, and the duct or pipe flange connection should guarantee the strict, firmly.
3.18 when the air conditioning system of constant temperature, the demand is higher, the muffler insulation shell should be done with duct also processing.
3.19 muffler is installed, can use wire or check messenger wire method, should fail to meet the requirements for renovation.
After 3.20 muffler in place, we should strengthen management, to take protective measures. Other teams, the hanger is forbidden on the muffler flange and a hanger.
4 quality standards
4.1 ensure projects:
4.4.1 muffler model, size must comply with the design requirements, and indicate the direction of air flow.
Inspection methods: observation check and quantity of the feet.
4.1.2 muffler framework must be strong, cavity of partition size is correct, clapboard and wall plate junction close to the shell does not leak tight.
Test method: lever and observation to check.
4.1.3 silencing monomer installation, fixed end must be strong, is apart from the uniform.
Test method: lever and observation to check.
4.1.4 muffler must be correct installation direction and steam-water set separately.
Inspection method: to observe the examination.
4.2 the basic items:
2 anechoic material should reach sheet material laying stickup and firm, smooth; Loose material for filling evenly, without sinking.
Inspection method: to observe the examination.
4.2.2 anechoic material coverage should be joining together of gas flow, joining together neatly, no damage; Perforated plate burr hole spread evenly.
Inspection method: to observe the examination.
5 finished product protection
5.1 muffler finished product should be smooth, no water on the interior space of neat pattern, and the bottom has a mat, and it is necessary to waterproof measures.
5.2 the finished product shall be carried out according to the type, model number. Properly kept, and shall not suffer from rain and snow, the erosion of dirt, dust and moisture.
5.3 muffler in the process of loading and unloading, transportation and installation to should take put down gently, in case of damage to the finished product.
5.4 muffler should be checked before installation, filling the sound-absorbing material should not have obvious sink. We should deal with quality defects repair.
5.5 muffler is installed in case of suspension of work stage, should wrap up the port, in order to avoid damage or into the holes in the soil, etc.
6 should pay attention to quality problems
6.1 muffler with wrapping material is easy to damage, make the sound-absorbing material leakage or loss, influence function. , nailed the bubble wrapping material should add the gasket. Found that there is any breakage phenomenon with wrapping material, timely repair or replacement as the case may be.
6.2 silencing laying anechoic material easy to sink, gap appears and influence the absorption effect. Production on large volume of sound absorption can be installed within the vessel proper baffle, handling and installation to should take put down gently. Before installation should be checked, silencing material must not have obvious sink.
6.3 muffler and shell joining together Angle is easy produce holes and air leakage, should be pay attention to when producing, found the hole immediately with soldering or sealant plugging after yan.
6.4 perforated plate after drilling burr easy cut wrapping material or produce noise, orifice burr should be smooth.
6.5 not filled with anechoic material evenly, cover is not tight, uneven distribution of silencing holes, small aperture, with a total area of inadequate performance, according to the design or specification strictly process operations.
6.6 the radian of silencing bend curved piece of uneven, silencing patches of not equal to the distance, should seriously implement technology standard, to eliminate defects.
7 quality records
7.1 muffler production and installation of engineering quality inspection evaluation form.
7.2 self-inspection, mutual inspection records.
7.3 preview engineering inspection record sheet.
The technology standard is applicable to resistance, resistance, resonant muffler production and installation works.
2 construction preparation
2.1 material requirements and main machines:
2.1.1 all sorts of plank, sections should have qualified certificate or leaving the qualification documents.
2.1.2 in addition to the above documents, should be a visual inspection. Plate surface should be smooth, uniform thickness, convex concave and crushed phenomenon obviously, and can not have crack, delamination, corrosion and pitting. Steel should be such as type, there should be no crack, scratch, pitting and other quality defects.
2.1.3 sound-absorbing material selection should be in strict accordance with the design requirements, and meet the requirement of fire prevention, moistureproof and corrosion resistance.
2.1.4 other materials can not be caused by a flawed reduce the strength of the finished product or affect the use effect.
2.1.5 longmen plate shears, oscillating curve shearing machine, manual electric cutting and chamfering machine, nip machine, machine, bite compactor, joint machine, steel cutting machine, punching machine, bench drill, drill, hydraulic rivet pliers, electric pull riveting gun, air compressors, airbrush, steel ruler, square, protractor, cross gauge, row needle, the blunt, hammers, wooden hammer, clappers, pulley, chain hoist, wire rope, adjustable wrench, pliers, screwdriver, hacksaw, hammer, steel tape, spirit level, etc.
2.2 operation conditions:
2.2.1 should have capacious, bright, ground level off, clean workshop.
2.2.2 job site must have the machine that could satisfy the requirement of processing technology, facilities, power supply, security protection equipment and fire equipment.
2.2.3 muffler production should be carried out in accordance with the design drawings and the requirements of the standard drawing, and the builder written disclosure quality, technology, and safety.
2.2.4 muffler as applied to the production of materials, should comply with the regulations of design of fire prevention, anti-corrosion, moisture-proof and health requirement.
3 operation process
3.1 process:
Shell lofting - shear, gaunt, fold the side - forming
Acquisition and feed to welding, punching, drilling flange
Silencing slice of blanking to fill the anechoic material, binding with wrapping material
- assembly - flange riveting to finished goods inspection to the factory, installation, test
3.2 muffler production. All kinds of sheet metal processing machinery processing should be adopted, such as shearing, folding, folding, bite, etc., do a molding, reduce manual operation. Galvanized steel construction, attention should be paid to that the zinc coating are not destroyed, as far as possible the bite or riveting.
3.3 muffler framework should be solid, shell leakage is not allowed. Muffler pipe, tube, plate, plate making, flange production and riveting required reference 4.1 content, etc.
3.4 resistance muffler (figure 4-28) in the processing, the internal size cannot be changed. Its resistance silencing slice (figure 4-29) is made from wood reinforced wooden frame (such as the design requirements with metal structure, according to the design requirements for processing), fill in superfine glass wool sound-absorbing material, such as outsourcing glass cloth such as wrapping material. When filled with sound-absorbing material, should according to the design of unit weight, thickness requirements laid evenly, cover shall not be damaged. Binding sound-absorbing board, parts contacted with air bubble nails, painted with the rest of the nail with the binding. Nail, nail bubble in the bubble nail add a layer of gaskets, can reduce the damage phenomenon. For larger volume of sound absorption, to prevent the sound-absorbing material caused by muffler installation or mobile sinks, can be installed within the vessel proper baffle. 3.5 resistant muffler figure 4-30 is the use of the pipe cross section mutation, silencing effect. When processed, can not arbitrarily change the size of the expansion chamber.
3.6 a resonant muffler (figure 4-31) production should be according to the design requirements for processing. Can not arbitrarily change the size of the key parts. Perforated plate aperture and perforation rate should comply with the design requirements. Perforated plate after rushed, drill hole, orifice burr should be smooth. The partition size should be correct, partition of resonant cavity plate joint should be close to with wall.
3.7 (figure 4-32) impedance compound muffler assembly, should be made of round nails to silencing staples into silencing pills group, at the same time with the rivet transverse diaphragm and riveting tube section, then the paragraphs with a round head wood screw tube fixed to the silencing slice group, then the pipe and horizontal clapboard, and muffler on both ends of the cover plate, plate and tube with oval head self-tapping screws, finally flange rivet at both ends.
3.8 muffler duct, silencing plenum and semi-anechoic elbow silencing of lining material shall be uniform tiejin, cannot fall off, and flat-fell seam to dense, smooth surface, cannot be uneven.
Anechoic material covering 3.9 muffler shall not be damaged, lap joint should be suitable airflow, and the interface can not have burrs. Inside the muffler directly face fabric should have protection against the wind.
Silencing bend flat side length is greater than 3.10 800 mm, should be added a diversion absorption. Diversion absorption surface should be smooth, uniform circular arc, closely firmly connected to the pipe bending. Can not have loose phenomenon.
3.11 muffler shutter, framework should be solid, blade distance should be uniform, sound absorption surface direction should comply with the design requirements.
3.12 muffler metal components inside and outside surface should besmear brushs red lead paint two high-quality galvanized plate (not painted anticorrosive paint). Before coating, metal surface should be in accordance with the need to be processing, remove rust, grease and other sundry. No leakage requirement when brushing besmear, blister, grinning.
3.13 after assembly of finished products shall, in accordance with requirements of the design documents and construction acceptance specifications, products meet the requirements before leaving the factory.
3.14 muffler, muffler elbow when installation should be set separately, hanger, make duct don't bear its weight.
Steam-water 3.15 should be according to the type, specification and the structure of the muffler structure situation, selected in accordance with the provisions of national standard or design drawings. Muffler should check before installation, hanger fixed position is correct, such as embedded parts or whether the expansion bolt installation is firm and reliable. , hanger must guarantee to load.
3.16 muffler, hanger in the screw hole distance of iron on the wear derrick, should be slightly wider than the muffler 40 ~ 50 mm. In order to facilitate adjustment elevation, but at the end of boom set of 50 ~ 60 mm thread, in order to leveling and alignment. Can also be used in the method of the padded on the iron, leveling, alignment.
3.17 installation direction of the muffler must be correct, and the duct or pipe flange connection should guarantee the strict, firmly.
3.18 when the air conditioning system of constant temperature, the demand is higher, the muffler insulation shell should be done with duct also processing.
3.19 muffler is installed, can use wire or check messenger wire method, should fail to meet the requirements for renovation.
After 3.20 muffler in place, we should strengthen management, to take protective measures. Other teams, the hanger is forbidden on the muffler flange and a hanger.
4 quality standards
4.1 ensure projects:
4.4.1 muffler model, size must comply with the design requirements, and indicate the direction of air flow.
Inspection methods: observation check and quantity of the feet.
4.1.2 muffler framework must be strong, cavity of partition size is correct, clapboard and wall plate junction close to the shell does not leak tight.
Test method: lever and observation to check.
4.1.3 silencing monomer installation, fixed end must be strong, is apart from the uniform.
Test method: lever and observation to check.
4.1.4 muffler must be correct installation direction and steam-water set separately.
Inspection method: to observe the examination.
4.2 the basic items:
2 anechoic material should reach sheet material laying stickup and firm, smooth; Loose material for filling evenly, without sinking.
Inspection method: to observe the examination.
4.2.2 anechoic material coverage should be joining together of gas flow, joining together neatly, no damage; Perforated plate burr hole spread evenly.
Inspection method: to observe the examination.
5 finished product protection
5.1 muffler finished product should be smooth, no water on the interior space of neat pattern, and the bottom has a mat, and it is necessary to waterproof measures.
5.2 the finished product shall be carried out according to the type, model number. Properly kept, and shall not suffer from rain and snow, the erosion of dirt, dust and moisture.
5.3 muffler in the process of loading and unloading, transportation and installation to should take put down gently, in case of damage to the finished product.
5.4 muffler should be checked before installation, filling the sound-absorbing material should not have obvious sink. We should deal with quality defects repair.
5.5 muffler is installed in case of suspension of work stage, should wrap up the port, in order to avoid damage or into the holes in the soil, etc.
6 should pay attention to quality problems
6.1 muffler with wrapping material is easy to damage, make the sound-absorbing material leakage or loss, influence function. , nailed the bubble wrapping material should add the gasket. Found that there is any breakage phenomenon with wrapping material, timely repair or replacement as the case may be.
6.2 silencing laying anechoic material easy to sink, gap appears and influence the absorption effect. Production on large volume of sound absorption can be installed within the vessel proper baffle, handling and installation to should take put down gently. Before installation should be checked, silencing material must not have obvious sink.
6.3 muffler and shell joining together Angle is easy produce holes and air leakage, should be pay attention to when producing, found the hole immediately with soldering or sealant plugging after yan.
6.4 perforated plate after drilling burr easy cut wrapping material or produce noise, orifice burr should be smooth.
6.5 not filled with anechoic material evenly, cover is not tight, uneven distribution of silencing holes, small aperture, with a total area of inadequate performance, according to the design or specification strictly process operations.
6.6 the radian of silencing bend curved piece of uneven, silencing patches of not equal to the distance, should seriously implement technology standard, to eliminate defects.
7 quality records
7.1 muffler production and installation of engineering quality inspection evaluation form.
7.2 self-inspection, mutual inspection records.
7.3 preview engineering inspection record sheet.
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