Indoor pipeline installation and construction method for clean factory building of biological manufacturing pilot plant test base

Abstract

The invention discloses an indoor pipeline installation construction method for a clean plant of a biological manufacturing pilot plant test base. Comprising the steps of air pipe prefabrication, air pipe hanging bracket installation, air pipe installation, air pipe leakproofness inspection, air opening installation, fireproof valve installation, smoke exhaust opening installation, air pipe cleaning, filter installation, air pipe air leakage amount measurement, stainless steel pipeline welding, plastic pipeline installation, pipeline pressure measurement and pipeline flushing. The pipelines are mounted in a classified mode, and the situation that pipe openings are polluted during cross construction is avoided; the air pipe is prevented from being deformed through a padding board at the contact part of the air pipe and the bracket; the sealing performance of a pipeline connector is guaranteed, the overall construction quality is improved, the construction difficulty is reduced, the construction period is shortened, and popularization is easy.

Description

Technical field:

[0001] The invention relates to a clean workshop pipeline installation method, in particular to an indoor pipeline installation construction method for a clean workshop of a biomanufacturing pilot base, and belongs to the technical field of pipeline installation. Background technology:

[0002] With the continuous development of the economy, biological clean workshops are playing an increasingly important role in the fields of medicine, food, chemical industry, etc. Among them, the transportation and installation of pipelines are the most basic conditions to ensure the cleanliness of the workshop; because the construction involves a wide range, there are purification air conditioning, power lighting, clean room decoration, industrial pipelines, water supply and drainage pipelines, air conditioning water pipelines, automatic control and other types of work on the same work surface at the same time, which not only increases the difficulty of construction, but also, if the operation is not careful, it will reduce the cleanliness in the workshop, thereby extending the construction period. Summary of the invention:

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a method for installing and constructing indoor pipelines in a clean workshop of a biomanufacturing pilot base, which not only meets the requirements of the clean room being airtight, but also ensures the beauty and coordination of the entire interior, improves work efficiency, and shortens the construction period.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A method for installing indoor pipelines in a clean workshop of a biomanufacturing pilot base comprises the following steps:

[0006] S1. Duct prefabrication

[0007] ①. Prepare the low- and medium-pressure duct steel plates and high-pressure duct steel plates required for construction. The thickness of the low- and medium-pressure duct steel plates is 0.5mm-1.2mm, and the thickness of the high-pressure duct steel plates is 0.75mm-1.2mm;

[0008] ② Use a leveling machine to calibrate the steel plate. When feeding, the steel plate should remain horizontal;

[0009] ③. Use joint angles or snaps to bite the air ducts. When cutting the air ducts, reserve the corresponding bite amount and chamfer according to the size;

[0010] ④. When using single or double sheets for cutting, the sheet should be cut within the combined flange forming allowance of the folding line;

[0011] ⑤. According to different bite forms, the bite machine is used for bite. The duct material formed by the panel should reserve the angle steel flange forming amount;

[0012] S2. Installation of air duct hanger

[0013] ①. Check the coordinate position and elevation of the air duct, and mark the direction and position of the air duct;

[0014] ② Before making the support and hanger, calibrate the steel; the duct support and hanger are set outside the insulation layer, and wooden supports are added at the cross arms to prevent cold bridges; wooden boards are placed where the circular duct contacts the bracket to prevent deformation of the duct;

[0015] S3. Installation of air duct

[0016] ① After the hanger is installed, re-measure the position and height of the hanger, and pre-arrange the air ducts and components;

[0017] ② Before installing the air duct, pre-install the air duct as a whole on the ground, install gaskets at the flange interface, and finally hoist the air duct into place;

[0018] ③ After the air duct is installed, the horizontality of the air duct should be guaranteed, with a deviation of no more than 3mm per meter and an overall deviation of no more than 10mm; the verticality deviation of the riser should be no more than 2mm per meter and the total deviation of the riser should be no more than 10mm;

[0019] ④. After the air duct is connected, check the overall straightness of the air duct and perform local leveling and alignment;

[0020] ⑤. The detachable interfaces and adjustment mechanisms of air ducts and accessories shall not be installed in walls or floors; supports and hangers shall not be installed at air vents, valves, inspection doors and automatic control mechanisms; various adjustment devices shall be installed in locations that are easy to operate;

[0021] S4. Duct tightness test

[0022] ① After the air duct is connected, the light leakage test or air leakage test should be carried out on the air duct. If there is air leakage, it should be reinstalled until there is no leakage;

[0023] ②. Low-voltage systems shall be inspected in accordance with the specifications, with a sampling rate of 5%, and no less than one system shall be inspected; for medium-voltage systems, the sampling rate is 20%, and no less than one system shall be inspected;

[0024] S5. Air outlet installation

[0025] ① Before installation, check the quality of the air outlet. The surface of the air outlet should be flat, the size deviation should not exceed 2mm, the difference between the two diagonals of the rectangular air outlet should not exceed 3mm, the air outlet rotation adjustment part should be flexible, the blades should be straight, and should not rub against the frame, and the blade spacing should be uniform;

[0026] ② During installation, the air outlet should be closely coordinated with the decoration. After installation, it should be kept flat, straight, and beautiful. The connection between the air outlet and the air duct should be tight and firm, and close to the decorative surface. The surface should be flat and not deformed, and the adjustment should be flexible and reliable.

[0027] ③ When installing strip vents, the joints should be connected naturally without obvious gaps; the installation height of the same vents in the same hall or room should be consistent and arranged neatly;

[0028] ④. For exposed vents without ceilings, the deviation between the installation position and elevation should not exceed 10mm; when the vent is installed horizontally, the horizontality deviation should not exceed 3 / 1000; when the vent is installed vertically, the verticality deviation should not exceed 2 / 1000;

[0029] S6. Installation of fire dampers

[0030] ① Before installation, check the valve appearance and operation to see if it is intact, check the flexibility of the action, and install it only after confirming that the valve is normal;

[0031] ② The air duct between the fire damper and the fire wall or floor is made of 1.6mm steel plate, a fire-resistant insulation layer is set on the outer wall of the air duct, and a fire-resistant protective pipe is set outside the fireproof electrical circuit;

[0032] ③. Set a 200mm clear space on one side of the valve operating mechanism to facilitate later maintenance; when installing the fire damper in the ceiling, set an inspection door under the observation window and the operation;

[0033] S7. Installation of smoke exhaust valve and smoke exhaust port

[0034] ①. Steel pipe protective sleeves are installed on the outside of electrical lines and control cables. The bending radius of the control cable sleeve should not be less than 250mm, the number of bends should generally not exceed 3, and the cable length should not exceed 6m;

[0035] ②. Lay the casing at the corresponding position from the exhaust valve port to the remote control device, with one end of the casing close to the exhaust valve port and the other end close to the remote control device. Then pass the cable through the casing, and let one end of the cable pass through the spring mechanism on the valve body. Then pass it on the spool and clamp it with a wire rope. Finally, cut off the excess cable.

[0036] ③. The other end of the cable goes through the remote control device, passes through the spool and is wound around the drum, at least three times, and finally, the excess part is cut off;

[0037] ④. When installing the multi-leaf smoke exhaust outlet, first remove the aluminum alloy air outlet, build the valve body into the wall, smooth it with cement around, or fix it on the embedded steel parts with bolts, and then install the aluminum alloy air outlet. Do not leave any relics on the valve body and do not scratch the aluminum alloy air outlet;

[0038] S8. Cleaning of air duct

[0039] ①. The equipment used for cleaning the air duct should be used exclusively for the purpose. The containers used for cleaning the air duct should not be used to hold other solvents, oils and sewage, and the containers should be kept clean; vacuum cleaners and iodine tungsten lamps should be kept clean;

[0040] ② The special iodine tungsten lamps and cables used for light leakage inspection should be clean and dust-free, without damage or scratches, with good insulation and leakage switch protection;

[0041] ③ Any material used in the cleaning or light leakage inspection process should not carry or generate dust;

[0042] S9. Filter installation

[0043] ① After the clean room and purification air conditioning system are installed, they should be thoroughly cleaned and run for 24 hours before installing the high-efficiency filter;

[0044] ② During transportation and storage, the high-efficiency filter should be placed vertically and marked; during transportation, it should be handled with care to avoid severe vibration and collision;

[0045] ③. When installing the high-efficiency filter, the protective bag can be removed, and the filter paper, sealant and frame of the filter should be carefully checked for damage; if damaged, they should be repaired. If the damage is serious and cannot be repaired on site, they should be replaced. During the installation process, the filter paper must not be touched by hands or tools under any circumstances;

[0046] ④ When installing the high-efficiency filter, the arrow on the outer frame should be consistent with the airflow direction; when the high-efficiency filter is installed vertically, its corrugated plate should be perpendicular to the ground to avoid damage to the filter paper;

[0047] ⑤. The installation frame of the high-efficiency filter should be straight and the joints should be flat to ensure that they are on the same plane; after the high-efficiency filter is installed in place, leak detection and plugging operations should be carried out;

[0048] S10. Measurement of air leakage in air ducts

[0049] ①. Use a hose to connect the air outlet of the air leakage detector fan to the air duct to be tested. Except for the hose connected to the test device and a duct pressure measuring tube led out from the top, the other interfaces of the duct should be blocked;

[0050] ② When the air leakage detector is started and the fan speed is gradually increased, air is injected into the air duct through the hose, and the pressure in the air duct will gradually increase; when the air duct reaches the required test pressure, the fan speed of the detector is adjusted to keep the pressure in the air duct constant. At this time, the air volume measured at the fan inlet is the air leakage volume of the tested air duct under this pressure;

[0051] S11. Welding of stainless steel pipes

[0052] ①. Welding materials should be placed in a dry and ventilated place with an ambient temperature above 0℃. Welding rods should be baked before use. The baking temperature should be 150-200℃ and the insulation time should be 1 hour. The oil and oxide on the surface of welding wires should be removed before use.

[0053] ② The purity of argon gas used in manual tungsten arc welding must not be less than 99.9%, and cerium tungsten electrode should be used for tungsten rod; when grinding, the uniformity of the geometric shape of the tungsten end should be maintained;

[0054] ③. Use mechanical or plasma cutting to cut the pipe. If there are local unevenness in the welding groove, it should be trimmed; if there are cracks, delamination, and slag defects, they should be cleaned before welding;

[0055] ④. When the pipe wall thickness is less than 4mm, manual tungsten inert gas welding is used; when the pipe wall thickness is ≥4mm, manual arc welding or manual tungsten inert gas welding is used; when the outer diameter of the pipe is ≤108mm, manual tungsten inert gas welding is used; when the outer diameter of the pipe is >108mm, manual arc welding or manual tungsten inert gas welding is used for base laying, and manual arc welding is used for cover laying;

[0056] ⑤. Manual tungsten inert gas arc welding adopts direct current positive connection method, the workpiece is connected to the positive pole, and the electrode is connected to the negative pole; before welding, the oil and dirt within the width of 15 to 20 mm on both sides of the weld should be cleaned, the welding wire must be polished and cleaned with acetone;

[0057] ⑥ During welding, the pipe should be filled with sufficient argon gas for protection. Use arc-starting pole or high-frequency arc-starting device. It is strictly forbidden to directly contact the pipe wall to start the arc. The movement of the welding torch should be kept stable and should not swing horizontally. When the weld is wide, the welding torch can swing slightly horizontally, the moving speed is slow, and the swinging pattern is zigzag. It is not advisable to retreat the welding torch. The wire feeding speed should be uniform, and the wire feeding swing amplitude should not be too large. The end of the welding wire should be in the argon protection area from beginning to end to prevent oxidation.

[0058] ⑦. Observe the molten pool sinking at any time to avoid excessive penetration or burning through. Left-hand welding should be adopted. Under the premise of ensuring welding quality, the welding speed should be as fast as possible. When closing the arc, add welding wire at the arc pit;

[0059] ⑧ Before manual arc welding, the 20mm width range on both sides of the groove should be cleaned, chalk powder should be applied within the 100mm range on both sides of the groove, and the weld should be fixed; when using the DC reverse connection method for welding, short arc operation must be used, the electrode should move forward in a straight line, without lateral swing or reduce the swing amplitude, and the welding speed should not be too slow; when striking the arc, there should be an arc striking plate or the arc should be struck in the groove. During the welding process, the arc must not be interrupted, and the electrode needs to be replaced quickly. After the joint is fused, it can continue to move forward, and the arc pit should be filled before the arc is closed;

[0060] S12. Construction of plastic pipes

[0061] ①. The joint surface must be softened and kept semi-humid first, and there must be enough glue to fill the gap between the pipe fittings and pipe accessories; the combination of pipe fittings and pipe accessories must be joined when the surface is still wet or semi-humid;

[0062] ② Use glue alone or a suitable cleaning agent, or both together to soften and weld the plastic pipe;

[0063] ③. When cutting the pipe, keep the cutting straight. When using a wheel-type plastic pipe cutter to continue cutting the pipe, use a knife, chamfering tool or file to remove the burrs on the pipe mouth;

[0064] ④. Wipe off the dust, grease and moisture on the end of the pipe, and check whether the pipe and pipe fittings are dry before gluing. The pipe should be inserted into the position of 1 / 4 to 3 / 4 of the pipe fittings, and the plug-in should not be too tight;

[0065] ⑤. Use a properly sized applicator to apply the cleaner to the inside of the pipe fitting sleeve, and apply repeatedly until the entire surface has softened. In cold weather and on hard surfaces, apply more times;

[0066] ⑥. While the surface of the pipe is sticky, use a coating tool of appropriate size to apply glue to the outside of the pipe, and repeatedly apply it to the area where it meets the pipe fittings. Try not to apply it too thinly, otherwise it will dry quickly;

[0067] ⑦. Repeatedly apply glue to the inside of the pipe fittings to avoid excessive glue residue inside; apply another layer of glue on the pipe after a few seconds; when the glue is in a soft state, immediately insert the pipe into the sleeve. At this time, the fittings can be adjusted appropriately, but the pipe must be pushed to the bottom. If necessary, rotate the pipe 1 / 4 turn after insertion;

[0068] ⑧. Hold the fitting for 30 seconds to make sure that a circle of glue is visible around the pipe and at the fitting joint after the joint is established. Wipe off excess glue with a soft dry cloth and avoid moving the joint.

[0069] S13, Pipeline pressure measurement

[0070] ①. The strength test pressure is 1.5 times the working pressure. Zone and layer pressure test: pressure test the pipelines in relatively independent local areas;

[0071] ②. Under the test pressure, stabilize the pressure for 10 minutes, and the pressure shall not drop. Then reduce the system pressure to the working pressure, and the pressure shall not drop within 60 minutes. The appearance inspection is qualified if there is no leakage;

[0072] ③. After all the partition pipelines are connected to the system trunk pipeline, the system pressure test is carried out on the pipelines of the entire system; the pressure at the lowest point of the test pressure shall prevail, but the pressure at the lowest point shall not exceed the bearing pressure of the pipeline and components; after the pressure test is increased to the strength test pressure, the pressure shall be stabilized for 10 minutes, and the pressure drop shall not be greater than 0.02Mpa, and then the system pressure shall be reduced to the working pressure, and the pressure shall not drop within 60 minutes. The appearance inspection is qualified if there is no leakage;

[0073] S14, system flushing

[0074] ①. Flushing of the pipeline system should be carried out after the pipeline pressure test is qualified and before commissioning; the water inlet and outlet of the pipeline flushing should be selected in appropriate locations, and it is appropriate to ensure that the debris in the pipeline system is flushed clean; the cross-sectional area of ​​the drainage pipe should not be less than 60% of the cross-sectional area of ​​the flushed pipeline, and the drainage pipe should be connected to the drainage well or drainage ditch;

[0075] ②. The water supply pipeline is flushed at the maximum flow rate of the system and a flow rate of not less than 1.5m / s until the water color and transparency at the outlet are consistent with those at the inlet visually.

[0076] ③. The air-conditioning water supply and return pipes should be recirculated for trial operation for more than 2 hours after the system is flushed and the sewage is discharged. The water quality should be normal before they can be connected with the refrigeration unit and air-conditioning equipment. The flushing water inlet and drain outlet should be selected at appropriate locations, and ensure that the debris in the pipe system is flushed clean.

[0077] The positive beneficial effects of the present invention are:

[0078] 1. The air duct of the present invention is installed and constructed in the following order: positioning and laying out, installation of air duct hangers, connection of air ducts, light leakage inspection, air duct hoisting, air leakage inspection, air duct insulation and heat preservation, air outlet installation, system air blowing, trial operation of air conditioning equipment, installation of high-efficiency filters, and system debugging, so as to avoid deformation of the air duct during the construction process, ensure the sealing between the pipe openings and the overall construction quality, and shorten the construction period.

[0079] 2. The installation of the pipeline of the present invention is divided into two parts: stainless steel pipe installation and plastic pipe installation. By classifying the pipelines for installation, contamination of the pipe openings during cross-construction can be avoided, the sealing of the pipeline interface is ensured, and the smooth construction of the pipe openings is facilitated. Specific implementation method:

[0080] The present invention will be further explained and described below:

[0081] Embodiment, a method for installing indoor pipelines in a clean workshop of a biomanufacturing pilot base, comprising the following steps:

[0082] S1. Duct prefabrication

[0083] ①. Prepare the low- and medium-pressure duct steel plates and high-pressure duct steel plates required for construction. The thickness of the low- and medium-pressure duct steel plates is 0.5mm-1.2mm, and the thickness of the high-pressure duct steel plates is 0.75mm-1.2mm;

[0084] ② Use a leveling machine to calibrate the steel plate. When feeding, the steel plate should remain horizontal;

[0085] ③. Use joint angles or snaps to bite the air ducts. When cutting the air ducts, reserve the corresponding bite amount and chamfer according to the size;

[0086] ④. When using single or double sheets for cutting, the sheet should be cut within the combined flange forming allowance of the folding line;

[0087] ⑤. According to different bite forms, the bite machine is used for bite. The duct material formed by the panel should reserve the angle steel flange forming amount;

[0088] S2. Installation of air duct hanger

[0089] ①. Check the coordinate position and elevation of the air duct, and mark the direction and position of the air duct;

[0090] ② Before making the support and hanger, calibrate the steel; the duct support and hanger are set outside the insulation layer, and wooden supports are added at the cross arms to prevent cold bridges; wooden boards are placed where the circular duct contacts the bracket to prevent deformation of the duct;

[0091] S3. Installation of air duct

[0092] ① After the hanger is installed, re-measure the position and height of the hanger, and pre-arrange the air ducts and components;

[0093] ② Before installing the air duct, pre-install the air duct as a whole on the ground, install gaskets at the flange interface, and finally hoist the air duct into place;

[0094] ③ After the air duct is installed, the horizontality of the air duct should be guaranteed, with a deviation of no more than 3mm per meter and an overall deviation of no more than 10mm; the verticality deviation of the riser should be no more than 2mm per meter and the total deviation of the riser should be no more than 10mm;

[0095] ④. After the air duct is connected, check the overall straightness of the air duct and perform local leveling and alignment;

[0096] ⑤. The detachable interfaces and adjustment mechanisms of air ducts and accessories shall not be installed in walls or floors; supports and hangers shall not be installed at air vents, valves, inspection doors and automatic control mechanisms; various adjustment devices shall be installed in locations that are easy to operate;

[0097] S4. Duct tightness test

[0098] ① After the air duct is connected, the light leakage test or air leakage test should be carried out on the air duct. If there is air leakage, it should be reinstalled until there is no leakage;

[0099] ②. Low-voltage systems shall be inspected in accordance with the specifications, with a sampling rate of 5%, and no less than one system shall be inspected; for medium-voltage systems, the sampling rate is 20%, and no less than one system shall be inspected;

[0100] S5. Air outlet installation

[0101] ① Before installation, check the quality of the air outlet. The surface of the air outlet should be flat, the size deviation should not exceed 2mm, the difference between the two diagonals of the rectangular air outlet should not exceed 3mm, the air outlet rotation adjustment part should be flexible, the blades should be straight, and should not rub against the frame, and the blade spacing should be uniform;

[0102] ② During installation, the air outlet should be closely coordinated with the decoration. After installation, it should be kept flat, straight, and beautiful. The connection between the air outlet and the air duct should be tight and firm, and close to the decorative surface. The surface should be flat and not deformed, and the adjustment should be flexible and reliable.

[0103] ③ When installing strip vents, the joints should be connected naturally without obvious gaps; the installation height of the same vents in the same hall or room should be consistent and arranged neatly;

[0104] ④. For exposed vents without ceilings, the deviation between the installation position and elevation should not exceed 10mm; when the vent is installed horizontally, the horizontality deviation should not exceed 3 / 1000; when the vent is installed vertically, the verticality deviation should not exceed 2 / 1000;

[0105] S6. Installation of fire dampers

[0106] ① Before installation, check the valve appearance and operation to see if it is intact, check the flexibility of the action, and install it only after confirming that the valve is normal;

[0107] ② The air duct between the fire damper and the fire wall or floor is made of 1.6mm steel plate, a fire-resistant insulation layer is set on the outer wall of the air duct, and a fire-resistant protective pipe is set outside the fireproof electrical circuit;

[0108] ③. Set a 200mm clear space on one side of the valve operating mechanism to facilitate later maintenance; when installing the fire damper in the ceiling, set an inspection door under the observation window and the operation;

[0109] S7. Installation of smoke exhaust valve and smoke exhaust port

[0110] ①. Steel pipe protective sleeves are installed on the outside of electrical lines and control cables. The bending radius of the control cable sleeve should not be less than 250mm, the number of bends should generally not exceed 3, and the cable length should not exceed 6m;

[0111] ②. Lay the casing at the corresponding position from the exhaust valve port to the remote control device, with one end of the casing close to the exhaust valve port and the other end close to the remote control device. Then pass the cable through the casing, and let one end of the cable pass through the spring mechanism on the valve body. Then pass it on the spool and clamp it with a wire rope. Finally, cut off the excess cable.

[0112] ③. The other end of the cable goes through the remote control device, passes through the spool and is wound around the drum, at least three times, and finally, the excess part is cut off;

[0113] ④. When installing the multi-leaf smoke exhaust outlet, first remove the aluminum alloy air outlet, build the valve body into the wall, smooth it with cement around, or fix it on the embedded steel parts with bolts, and then install the aluminum alloy air outlet. Do not leave any relics on the valve body and do not scratch the aluminum alloy air outlet;

[0114] S8. Cleaning of air duct

[0115] ①. The equipment used for cleaning the air duct should be used exclusively for the purpose. The containers used for cleaning the air duct should not be used to hold other solvents, oils and sewage, and the containers should be kept clean; vacuum cleaners and iodine tungsten lamps should be kept clean;

[0116] ② The special iodine tungsten lamps and cables used for light leakage inspection should be clean and dust-free, without damage or scratches, with good insulation and leakage switch protection;

[0117] ③ Any material used in the cleaning or light leakage inspection process should not carry or generate dust;

[0118] S9. Filter installation

[0119] ① After the clean room and purification air conditioning system are installed, they should be thoroughly cleaned and run for 24 hours before installing the high-efficiency filter;

[0120] ② During transportation and storage, the high-efficiency filter should be placed vertically and marked; during transportation, it should be handled with care to avoid severe vibration and collision;

[0121] ③. When installing the high-efficiency filter, the protective bag can be removed, and the filter paper, sealant and frame of the filter should be carefully checked for damage; if damaged, they should be repaired. If the damage is serious and cannot be repaired on site, they should be replaced. During the installation process, the filter paper must not be touched by hands or tools under any circumstances;

[0122] ④ When installing the high-efficiency filter, the arrow on the outer frame should be consistent with the airflow direction; when the high-efficiency filter is installed vertically, its corrugated plate should be perpendicular to the ground to avoid damage to the filter paper;

[0123] ⑤. The installation frame of the high-efficiency filter should be straight and the joints should be flat to ensure that they are on the same plane; after the high-efficiency filter is installed in place, leak detection and plugging operations should be carried out;

[0124] S10. Measurement of air leakage in air ducts

[0125] ①. Use a hose to connect the air outlet of the air leakage detector fan to the air duct to be tested. Except for the hose connected to the test device and a duct pressure measuring tube led out from the top, the other interfaces of the duct should be blocked;

[0126] ② When the air leakage detector is started and the fan speed is gradually increased, air is injected into the air duct through the hose, and the pressure in the air duct will gradually increase; when the air duct reaches the required test pressure, the fan speed of the detector is adjusted to keep the pressure in the air duct constant. At this time, the air volume measured at the fan inlet is the air leakage volume of the tested air duct under this pressure;

[0127] S11. Welding of stainless steel pipes

[0128] ①. Welding materials should be placed in a dry and ventilated place with an ambient temperature above 0℃. Welding rods should be baked before use. The baking temperature should be 150-200℃ and the insulation time should be 1 hour. The oil and oxide on the surface of welding wires should be removed before use.

[0129] ② The purity of argon gas used in manual tungsten arc welding must not be less than 99.9%, and cerium tungsten electrode should be used for tungsten rod; when grinding, the uniformity of the geometric shape of the tungsten end should be maintained;

[0130] ③. Use mechanical or plasma cutting to cut the pipe. If there are local unevenness in the welding groove, it should be trimmed; if there are cracks, delamination, and slag defects, they should be cleaned before welding;

[0131] ④. When the pipe wall thickness is less than 4mm, manual tungsten inert gas welding is used; when the pipe wall thickness is ≥4mm, manual arc welding or manual tungsten inert gas welding is used; when the outer diameter of the pipe is ≤108mm, manual tungsten inert gas welding is used; when the outer diameter of the pipe is >108mm, manual arc welding or manual tungsten inert gas welding is used for base laying, and manual arc welding is used for cover laying;

[0132] ⑤. Manual tungsten inert gas arc welding adopts direct current positive connection method, the workpiece is connected to the positive pole, and the electrode is connected to the negative pole; before welding, the oil and dirt within the width of 15 to 20 mm on both sides of the weld should be cleaned, the welding wire must be polished and cleaned with acetone;

[0133] ⑥ During welding, the pipe should be filled with sufficient argon gas for protection. Use arc-starting pole or high-frequency arc-starting device. It is strictly forbidden to directly contact the pipe wall to start the arc. The movement of the welding torch should be kept stable and should not swing horizontally. When the weld is wide, the welding torch can swing slightly horizontally, the moving speed is slow, and the swinging pattern is zigzag. It is not advisable to retreat the welding torch. The wire feeding speed should be uniform, and the wire feeding swing amplitude should not be too large. The end of the welding wire should be in the argon protection area from beginning to end to prevent oxidation.

[0134] ⑦. Observe the molten pool sinking at any time to avoid excessive penetration or burning through. Left-hand welding should be adopted. Under the premise of ensuring welding quality, the welding speed should be as fast as possible. When closing the arc, add welding wire at the arc pit;

[0135] ⑧ Before manual arc welding, the 20mm width range on both sides of the groove should be cleaned, chalk powder should be applied within the 100mm range on both sides of the groove, and the weld should be fixed; when using the DC reverse connection method for welding, short arc operation must be used, the electrode should move forward in a straight line, without lateral swing or reduce the swing amplitude, and the welding speed should not be too slow; when striking the arc, there should be an arc striking plate or the arc should be struck in the groove. During the welding process, the arc must not be interrupted, and the electrode needs to be replaced quickly. After the joint is fused, it can continue to move forward, and the arc pit should be filled before the arc is closed;

[0136] S12. Construction of plastic pipes

[0137] ①. The joint surface must be softened and kept semi-humid first, and there must be enough glue to fill the gap between the pipe fittings and pipe accessories; the combination of pipe fittings and pipe accessories must be joined when the surface is still wet or semi-humid;

[0138] ② Use glue alone or a suitable cleaning agent, or both together to soften and weld the plastic pipe;

[0139] ③. When cutting the pipe, keep the cutting straight. When using a wheel-type plastic pipe cutter to continue cutting the pipe, use a knife, chamfering tool or file to remove the burrs on the pipe mouth;

[0140] ④. Wipe off the dust, grease and moisture on the end of the pipe, and check whether the pipe and pipe fittings are dry before gluing. The pipe should be inserted into the position of 1 / 4 to 3 / 4 of the pipe fittings, and the plug-in should not be too tight;

[0141] ⑤. Use a properly sized applicator to apply the cleaner to the inside of the pipe fitting sleeve, and apply repeatedly until the entire surface has softened. In cold weather and on hard surfaces, apply more times;

[0142] ⑥. While the surface of the pipe is sticky, use a coating tool of appropriate size to apply glue to the outside of the pipe, and repeatedly apply it to the area where it meets the pipe fittings. Try not to apply it too thinly, otherwise it will dry quickly;

[0143] ⑦. Repeatedly apply glue to the inside of the pipe fittings to avoid excessive glue residue inside; apply another layer of glue on the pipe after a few seconds; when the glue is in a soft state, immediately insert the pipe into the sleeve. At this time, the fittings can be adjusted appropriately, but the pipe must be pushed to the bottom. If necessary, rotate the pipe 1 / 4 turn after insertion;

[0144] ⑧. Hold the fitting for 30 seconds to make sure that a circle of glue is visible around the pipe and at the fitting joint after the joint is established. Wipe off excess glue with a soft dry cloth and avoid moving the joint.

[0145] S13, Pipeline pressure measurement

[0146] ①. The strength test pressure is 1.5 times the working pressure. Zone and layer pressure test: pressure test the pipelines in relatively independent local areas;

[0147] ②. Under the test pressure, stabilize the pressure for 10 minutes, and the pressure shall not drop. Then reduce the system pressure to the working pressure, and the pressure shall not drop within 60 minutes. The appearance inspection is qualified if there is no leakage;

[0148] ③. After all the partition pipelines are connected to the system trunk pipeline, the system pressure test is carried out on the pipelines of the entire system; the pressure at the lowest point of the test pressure shall prevail, but the pressure at the lowest point shall not exceed the bearing pressure of the pipeline and components; after the pressure test is increased to the strength test pressure, the pressure shall be stabilized for 10 minutes, and the pressure drop shall not be greater than 0.02Mpa, and then the system pressure shall be reduced to the working pressure, and the pressure shall not drop within 60 minutes. The appearance inspection is qualified if there is no leakage;

[0149] S14, system flushing

[0150] ①. Flushing of the pipeline system should be carried out after the pipeline pressure test is qualified and before commissioning; the water inlet and outlet of the pipeline flushing should be selected in appropriate locations, and it is appropriate to ensure that the debris in the pipeline system is flushed clean; the cross-sectional area of ​​the drainage pipe should not be less than 60% of the cross-sectional area of ​​the flushed pipeline, and the drainage pipe should be connected to the drainage well or drainage ditch;

[0151] ②. The water supply pipeline is flushed at the maximum flow rate of the system and a flow rate of not less than 1.5m / s until the water color and transparency at the outlet are consistent with those at the inlet visually.

[0152] ③. The air-conditioning water supply and return pipes should be recirculated for trial operation for more than 2 hours after the system is flushed and the sewage is discharged. The water quality should be normal before they can be connected with the refrigeration unit and air-conditioning equipment. The flushing water inlet and drain outlet should be selected at appropriate locations, and ensure that the debris in the pipe system is flushed clean.

[0153] In the above description, the sol-glue bonding of pipes is a step that uses a detergent. When no detergent is used, successful gluing can be achieved using only glue. This method is best used in piping systems below 2 inches or with lower pressure requirements, or exhaust ducts below 6 inches with no pressure requirements. At the same time, it is necessary to first confirm that the glue bonding and penetration softening capabilities meet the pipeline requirements.

[0154] In addition, before gluing, appropriate joining tools should be prepared, such as appropriate glue, applicators of appropriate size, etc.; the pipe must be cut into a square, uneven cutting will reduce the efficiency of joining; all burrs on the pipe should be trimmed, as burrs will damage the softened surface or cause obstruction; dirt, grease, and moisture on the joints should be wiped off with a dry cloth, as humidity will prolong the joining time and oil will hinder bonding; check the tightness of the pipe and the fittings; the appropriate fit requires that the pipe must be able to easily enter the fitting to a depth of 1 / 4 to 3 / 4, but the pipe cannot directly enter the bottom of the fitting.

[0155] In the above description, use a coating tool of the correct size, about 1 / 2 of the pipe diameter, to apply glue to the end of the pipe. The surface size must be equal to the depth of the fitting, and then apply a layer of glue. Be careful not to let the glue flow into the pipe; while the surface is still wet, immediately push the pipe and fitting into the bottom of the fitting with appropriate force; you can also turn the pipe a quarter turn when inserting; when gluing, hold the joined pipe and fitting for 30 seconds to prevent both from loosening; after joining, there must be a layer or a circle of glue completely surrounding the joint. If not, it means that the glue is not enough, which may cause gluing failure. Wipe off the leaked glue with a cloth.

[0156] The present invention adopts the sequence of positioning and laying out, installing air duct hangers, connecting air ducts, checking for light leakage, hanging air ducts, detecting air leakage, insulating air ducts, installing air outlets, blowing air through the system, testing air conditioning equipment, installing high-efficiency filters, and debugging systems for installation and construction, thereby avoiding deformation of the air ducts during the construction process and ensuring the sealing between pipe openings and the overall construction quality; by classifying and installing the pipelines, contamination of the pipe openings during cross-construction can be avoided, thereby shortening the construction period, reducing the construction difficulty, and facilitating promotion.

Claims

1. A method for installing and constructing indoor pipelines in a clean workshop of a biomanufacturing pilot base, characterized in that: The steps include: S1. Duct prefabrication ①. Prepare the low- and medium-pressure duct steel plates and high-pressure duct steel plates required for construction. The thickness of the low- and medium-pressure duct steel plates is 0.5mm-1.2mm, and the thickness of the high-pressure duct steel plates is 0.75mm-1.2mm; ② Use a leveling machine to calibrate the steel plate. When feeding, the steel plate should remain horizontal; ③. Use joint angles or snaps to bite the air ducts. When cutting the air ducts, reserve the corresponding bite amount and chamfer according to the size; ④. When using single or double sheets for cutting, the sheet should be cut within the combined flange forming allowance of the folding line; ⑤. According to different bite forms, the bite machine is used for bite. The duct material formed by the panel should reserve the angle steel flange forming amount; S2. Installation of air duct hanger ①. Check the coordinate position and elevation of the air duct, and mark the direction and position of the air duct; ② Before making the support and hanger, calibrate the steel; the duct support and hanger are set outside the insulation layer, and wooden supports are added at the cross arms to prevent cold bridges; wooden boards are placed where the circular duct contacts the bracket to prevent deformation of the duct; S3. Installation of air duct ① After the hanger is installed, re-measure the position and height of the hanger, and pre-arrange the air ducts and components; ② Before installing the air duct, pre-install the air duct as a whole on the ground, install gaskets at the flange interface, and finally hoist the air duct into place; ③ After the air duct is installed, the horizontality of the air duct should be guaranteed, with a deviation of no more than 3mm per meter and an overall deviation of no more than 10mm; the verticality deviation of the riser should be no more than 2mm per meter and the total deviation of the riser should be no more than 10mm; ④. After the air duct is connected, check the overall straightness of the air duct and perform local leveling and alignment; ⑤. The detachable interfaces and adjustment mechanisms of air ducts and accessories shall not be installed in walls or floors; supports and hangers shall not be installed at air vents, valves, inspection doors and automatic control mechanisms; various adjustment devices shall be installed in locations that are easy to operate; S4. Duct tightness test ① After the air duct is connected, the light leakage test or air leakage test should be carried out on the air duct. If there is air leakage, it should be reinstalled until there is no leakage; ②. Low-voltage systems shall be inspected in accordance with the specifications, with a sampling rate of 5%, and no less than one system shall be inspected; for medium-voltage systems, the sampling rate is 20%, and no less than one system shall be inspected; S5. Air outlet installation ① Before installation, check the quality of the air outlet. The surface of the air outlet should be flat, the size deviation should not exceed 2mm, the difference between the two diagonals of the rectangular air outlet should not exceed 3mm, the air outlet rotation adjustment part should be flexible, the blades should be straight, and should not rub against the frame, and the blade spacing should be uniform; ② During installation, the air outlet should be closely coordinated with the decoration. After installation, it should be kept flat, straight, and beautiful. The connection between the air outlet and the air duct should be tight and firm, and close to the decorative surface. The surface should be flat and not deformed, and the adjustment should be flexible and reliable. ③ When installing strip vents, the joints should be connected naturally without obvious gaps; the installation height of the same vents in the same hall or room should be consistent and arranged neatly; ④ For exposed vents without ceilings, the deviation between installation position and elevation should not exceed 10mm; when installing the vent horizontally, the deviation of horizontality should not exceed 3 / 1000; when installing the vent vertically, the deviation of verticality should not exceed 2 / 1000; S6. Installation of fire dampers ① Before installation, check the valve appearance and operation to see if it is intact, check the flexibility of the action, and install it only after confirming that the valve is normal; ② The air duct between the fire damper and the fire wall or floor is made of 1.6mm steel plate, a fire-resistant insulation layer is set on the outer wall of the air duct, and a fire-resistant protective pipe is set outside the fireproof electrical circuit; ③. Set a 200 mm clear space on one side of the valve operating mechanism to facilitate later maintenance; when installing the fire damper in the ceiling, set an inspection door under the observation window and the operation; S7. Installation of smoke exhaust valve and smoke exhaust port ①. Steel pipe protective sleeves shall be installed on the outside of electrical lines and control cables. The bending radius of the control cable sleeve shall not be less than 250mm, the number of bends shall generally not exceed 3, and the cable length shall not exceed 6m; ②. Lay the casing at the corresponding position from the exhaust valve port to the remote control device, with one end of the casing close to the exhaust valve port and the other end close to the remote control device. Then pass the cable through the casing, and let one end of the cable pass through the spring mechanism on the valve body. Then pass it on the spool and clamp it with a wire rope. Finally, cut off the excess cable. ③. The other end of the cable goes through the remote control device, passes through the spool and is wound around the drum, at least three times, and finally, the excess part is cut off; ④. When installing the multi-leaf smoke exhaust outlet, first remove the aluminum alloy air outlet, build the valve body into the wall, smooth it with cement around, or fix it on the embedded steel parts with bolts, and then install the aluminum alloy air outlet. Do not leave any relics on the valve body and do not scratch the aluminum alloy air outlet; S8. Cleaning of air ducts ①. The equipment used for cleaning the air duct should be used exclusively for the purpose. The containers used for cleaning the air duct should not be used to hold other solvents, oils and sewage, and the containers should be kept clean; vacuum cleaners and iodine tungsten lamps should be kept clean; ② The special iodine tungsten lamps and cables used for light leakage inspection should be clean and dust-free, without damage or scratches, with good insulation and leakage switch protection; ③ Any material used in the cleaning or light leakage inspection process should not carry or generate dust; S9. Filter installation ① After the clean room and purification air conditioning system are installed, they should be thoroughly cleaned and run for 24 hours before installing the high-efficiency filter; ② During transportation and storage, the high-efficiency filter should be placed vertically and marked; during transportation, it should be handled with care to avoid severe vibration and collision; ③. When installing the high-efficiency filter, the protective bag can be removed, and the filter paper, sealant and frame of the filter should be carefully checked for damage; if damaged, they should be repaired. If the damage is serious and cannot be repaired on site, they should be replaced. During the installation process, the filter paper must not be touched by hands or tools under any circumstances; ④ When installing the high-efficiency filter, the arrow on the outer frame should be consistent with the airflow direction; when the high-efficiency filter is installed vertically, its corrugated plate should be perpendicular to the ground to avoid damage to the filter paper; ⑤. The installation frame of the high-efficiency filter should be straight and the joints should be flat to ensure that they are on the same plane; after the high-efficiency filter is installed in place, leak detection and plugging operations should be carried out; S10. Measurement of air leakage in air ducts ①. Use a hose to connect the air outlet of the air leakage detector fan to the air duct to be tested. Except for the hose connected to the test device and a duct pressure measuring tube led out from the top, the other interfaces of the duct should be blocked; ② When the air leakage detector is started and the fan speed is gradually increased, air is injected into the air duct through the hose, and the pressure in the air duct will gradually increase; when the air duct reaches the required test pressure, the fan speed of the detector is adjusted to keep the pressure in the air duct constant. At this time, the air volume measured at the fan inlet is the air leakage volume of the tested air duct under this pressure; S11. Welding of stainless steel pipes ①. Welding materials should be placed in a dry and ventilated place with an ambient temperature above 0℃. Welding rods should be baked before use. The baking temperature should be 150-200℃ and the insulation time should be 1 hour. The oil and oxide on the surface of welding wires should be removed before use. ② The purity of argon gas used in manual tungsten arc welding must not be less than 99.9%, and cerium tungsten electrode should be used for tungsten rod; when grinding, the uniformity of the geometric shape of the tungsten end should be maintained; ③. Use mechanical or plasma cutting to cut the pipe. If there are local unevenness in the welding groove, it should be trimmed; if there are cracks, delamination, and slag defects, they should be cleaned before welding; ④. When the pipe wall thickness is less than 4mm, manual tungsten inert gas welding is used; when the pipe wall thickness is ≥4mm, manual arc welding or manual tungsten inert gas welding is used; when the outer diameter of the pipe is ≤108mm, manual tungsten inert gas welding is used; when the outer diameter of the pipe is >108mm, manual arc welding or manual tungsten inert gas welding is used for base welding, and manual arc welding is used for cover welding; ⑤. Manual tungsten inert gas arc welding adopts direct current positive connection method, the workpiece is connected to the positive pole, and the electrode is connected to the negative pole; before welding, the oil and dirt within the width of 15 to 20 mm on both sides of the weld should be cleaned, the welding wire must be polished and cleaned with acetone; ⑥ During welding, the pipe should be filled with sufficient argon gas for protection. Use arc-starting pole or high-frequency arc-starting device. It is strictly forbidden to directly contact the pipe wall to start the arc. The movement of the welding torch should be kept stable and should not swing horizontally. When the weld is wide, the welding torch can swing slightly horizontally, the moving speed is slow, and the swinging pattern is zigzag. It is not advisable to retreat the welding torch. The wire feeding speed should be uniform, and the wire feeding swing amplitude should not be too large. The end of the welding wire should be in the argon protection area from beginning to end to prevent oxidation. ⑦. Observe the molten pool sinking at any time to avoid excessive penetration or burning through. Left-hand welding should be adopted. Under the premise of ensuring welding quality, the welding speed should be as fast as possible. When closing the arc, add welding wire at the arc pit; ⑧ Before manual arc welding, the 20mm width range on both sides of the groove should be cleaned, chalk powder should be applied within the 100mm range on both sides of the groove, and the weld should be fixed; when using the DC reverse connection method for welding, short arc operation must be used, the electrode should move forward in a straight line, without lateral swing or reduce the swing amplitude, and the welding speed should not be too slow; when striking the arc, there should be an arc striking plate or the arc should be struck in the groove. During the welding process, the arc must not be interrupted, and the electrode needs to be replaced quickly. After the joint is fused, it can continue to move forward, and the arc pit should be filled before the arc is closed; S12. Construction of plastic pipes ①. The joint surface must be softened and kept semi-humid first, and there must be enough glue to fill the gap between the pipe fittings and pipe accessories; the combination of pipe fittings and pipe accessories must be joined when the surface is still wet or semi-humid; ② Use glue alone or a suitable cleaning agent, or both together to soften and weld the plastic pipe; ③. When cutting the pipe, keep the cutting straight. When using a wheel-type plastic pipe cutter to continue cutting the pipe, use a knife, deburring tool or file to remove the burrs on the pipe mouth; ④. Wipe off the dust, grease and moisture on the end of the pipe, and check whether the pipe and pipe fittings are dry before gluing. The pipe should be inserted to the position of 1 / 4~3 / 4 of the pipe fittings, and the plug-in should not be too tight; ⑤. Use a properly sized applicator to apply the cleaner to the inside of the pipe fitting sleeve, and apply repeatedly until the entire surface has softened. In cold weather and on hard surfaces, apply more times; ⑥. While the surface of the pipe is sticky, use a coating tool of appropriate size to apply glue to the outside of the pipe, and repeatedly apply it to the area where it meets the pipe fittings. Try not to apply it too thinly, otherwise it will dry quickly; ⑦. Repeatedly apply glue to the inside of the pipe fittings to avoid too much glue remaining inside; apply another layer of glue on the pipe after a few seconds; when the glue is in a soft state, immediately insert the pipe into the sleeve. At this time, you can adjust the fittings appropriately, but the pipe must be pushed to the bottom. If necessary, rotate the pipe 1 / 4 turn after insertion; ⑧. Hold the fitting for 30 seconds to make sure that a circle of glue is visible around the pipe and at the fitting joint after the joint is made. Wipe off excess glue with a soft dry cloth and avoid moving the joint. S13, Pipeline pressure measurement ①. The strength test pressure is 1.5 times the working pressure. Zone and layer test: pressure test the pipelines in relatively independent local areas; ②. Under the test pressure, stabilize the pressure for 10 minutes, and the pressure shall not drop. Then reduce the system pressure to the working pressure, and the pressure shall not drop within 60 minutes. The appearance inspection is qualified if there is no leakage; ③. After all the partitioned pipelines are connected to the main system pipeline, the entire system pipeline is subjected to system pressure test; the pressure at the lowest point of the test pressure shall prevail, but the pressure at the lowest point shall not exceed the bearing pressure of the pipeline and components; after the pressure test is increased to the strength test pressure, the pressure shall be stabilized for 10 minutes, and the pressure drop shall not be greater than 0.02Mpa, and then the system pressure shall be reduced to the working pressure, and the pressure shall not drop within 60 minutes. The appearance inspection shall be qualified if there is no leakage; S14, system flushing ①. Flushing of the pipeline system should be carried out after the pipeline pressure test is qualified and before commissioning; the water inlet and outlet of the pipeline flushing should be selected in appropriate locations, and it is advisable to ensure that the debris in the pipeline system is flushed clean; the cross-sectional area of ​​the drainage pipe should not be less than 60% of the cross-sectional area of ​​the flushed pipeline, and the drainage pipe should be connected to the drainage well or drainage ditch; ②. The water supply pipeline shall be flushed at the maximum flow rate of the system and a flow rate of not less than 1.5m / s until the water color and transparency at the outlet are consistent with those at the inlet visually. ③. The air-conditioning water supply and return pipes should be recirculated for trial operation for more than 2 hours after the system is flushed and the sewage is discharged. The water quality should be normal before they can be connected with the refrigeration unit and air-conditioning equipment. The flushing water inlet and drain outlet should be selected at appropriate locations, and ensure that the debris in the pipe system is flushed clean.