CN101899668B - Acid-washing method for internal surfaces of metal capillary tubes - Google Patents
Acid-washing method for internal surfaces of metal capillary tubes Download PDFInfo
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- CN101899668B CN101899668B CN201010243444XA CN201010243444A CN101899668B CN 101899668 B CN101899668 B CN 101899668B CN 201010243444X A CN201010243444X A CN 201010243444XA CN 201010243444 A CN201010243444 A CN 201010243444A CN 101899668 B CN101899668 B CN 101899668B
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Abstract
The invention discloses an acid-washing method for internal surfaces of metal capillary tubes, which comprises the following steps of: 1, the trimming and fixing of tubes to be acid-washed; 2, tube insertion; and 3, acid washing, wherein in the trimming and fixing of the tubes to be acid-washed, bottom ends of a plurality of upright metal capillary tubes to be acid-washed are aligned, and lower parts of the upright metal capillary tubes to be acid-washed are hooped tightly by a sealing washer 1 to form an upright metal capillary tube bundle; in the process of tube insertion, the sealing washer 1 is ensured to be always fixed to the lower part of the metal capillary tube bundle, and the peripheral outer wall of the metal capillary tube bundle is always in close contact with the inner wall of a vertical acid-washing cylinder; and in the acid washing process, after the plurality of metal capillary tubes to be acid-washed are immersed into acid-washing liquid completely, the acid-washing process of the internal surfaces of the metal capillary tubes to be acid-washed is completed by the conventional acid-washing method. The acid-washing method has the advantages of novel and reasonable design, low invested cost, simple acid-washing steps, convenient realization, good acid-washing effect and capability of realizing the acid-washing process of the metal capillary tubes of which the inner diameters are less than or equal to 2 millimeters simply and conveniently and realizing the acid-washing process of the internal surfaces of the plurality of metal capillary tubes at one time simultaneously.
Description
Technical field
The present invention relates to a kind of surface treatment method of metal pipe material, especially relate to a kind of acid-washing method for internal surfaces of metal capillary tubes.
Background technology
Metal pipe material generally all need pass through surface acid-washing in process of manufacture or before finished product dispatches from the factory, and the pickling process in the tubing course of processing is arranged in before and after the intermediate heat treatment (or claiming annealing) usually.Wherein, the main purpose of pickling is to remove the zone of oxidation that produces in the course of processing before the thermal treatment, plays the effect of oil removing simultaneously; Pickling after the thermal treatment mainly in order to remove the zone of oxidation that heat treatment stages generates, avoids oxide inclusion to be present in the central pipe performance that influences of following process.And the finished product pickling is generally bright dipped finish, and purpose is to improve the surface quality of tubing.
For the tubing of internal diameter more than 2mm, the surface tension effects influence is small, and acid solution can flow in tubing smoothly, realizes acid cleaning process; But when pipe internal diameter during less than 2mm, the surface tension of liquid effect obviously strengthens, and acid solution is difficult in the pipe and flows; Maybe can't flow into tubing inside; Reason is when acid solution contacts with the tubing internal gas, can form a upper layer, and the molecular ratio liquid internal that is in the fluid surface layer is sparse; So they receive the effect of the inner power of directed toward liquid, make fluid surface have tendencies toward shrinkage; Simultaneously, receive the influence of force of cohesion between fluid molecule, make liquid level shrink automatically, thereby make acid solution dwindle its surface area as much as possible, do not flow into capillary tubes inside, thereby make pickling to realize.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned deficiency of the prior art; A kind of acid-washing method for internal surfaces of metal capillary tubes is provided; Its novel and reasonable design, the acid cleaning process that input cost is low, acid pickling step is simple and it is convenient to realize, pickling effect is good, the easy realization internal diameter of ability is less than or equal to the metal capillary tubes of 2mm, the while can realize once simultaneously the internal surface of many metal capillary tubes being carried out the acid cleaning process of pickling.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of acid-washing method for internal surfaces of metal capillary tubes is characterized in that this method may further comprise the steps:
201, intubate: with the bundle of metal capillary described in the step 1 from top to bottom straight cutting go into inside and pickle solution is housed and is in the vertical pickling tube of horizontal positioned, the pickle solution of adorning contacts in said metal capillary bundle bottom and vertical pickling tube; Cylindrical drum and its inner chamber height that said vertical pickling tube is a upper opening are not less than the height of treating the acid-washed metal capillary tubes, and the external diameter of said sealring one is identical with the internal diameter of vertical pickling tube; Said pickle solution is to treat the generic acid washing lotion that the used material of acid-washed metal capillary tubes is carried out pickling;
202, the short period of time stops: when the pickle solution of adorning contacts in said metal capillary bundle bottom and the vertical pickling tube; Stop intubate and stop t proceeding intubate after second again, the time t that is stopped treats the inner needed time of acid-washed metal capillary tubes for getting into according to the said pickle solution of capillarity second;
203, press pipe: wait to stop t after second, adopt pressing plate said metal capillary Shu Chuizhi to be pressed in the vertical pickling tube again, all immerse fully in the pickle solution of being adorned in the vertical pickling tube from top to bottom until the many said acid-washed metal capillary tubes of treating; And press in the pipe process, should guarantee that sealring one is fixed on said metal capillary bundle bottom all the time and around it outer wall closely contact with the inwall of vertical pickling tube all the time;
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes is characterized in that: treat described in the step 1 that the acid-washed metal capillary tubes is the metal capillary tubes of internal diameter≤2mm.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes is characterized in that: sealring described in the step 1 one is processed by spongy rubber.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes is characterized in that: the silica gel sealing pad of sealring one for being processed by silica gel described in the step 1.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes; It is characterized in that: described in the step 1 pass through sealring one-to-many root treat the bottom of acid-washed metal capillary tubes carry out lock ring fixing after, also need adopt more than two pairs of sealring to treat that the top of acid-washed metal capillary tubes carries out lock ring and fix; The external diameter of said sealring two is identical with the internal diameter of vertical pickling tube.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes; It is characterized in that: after acid cleaning process described in the step 3 finishes; With extracting in the said metal capillary bundle free-standing pickling tube and, according to step 2 to intubate described in the step 3 and acid washing method said metal capillary bundle being repeated a pickling again with after its inversion.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes is characterized in that: the volume V of the pickle solution of adorning in the vertical pickling tube described in the step 201
0>=sh-V
1, s is the cross-sectional area of the inner chamber of vertical pickling tube in the formula, h is a height of treating the acid-washed metal capillary tubes, V
1Be the many TVs of treating the acid-washed metal capillary tubes.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes; It is characterized in that: the pressing plate described in the step 203 is the baffle plate that presses down that top is provided with handle; The said baffle plate that presses down is the internal diameter that circular slab and its diameter are not less than vertical pickling tube, and the vertical pickling tube described in the step 201 lies in a horizontal plane on the acid solution recovering tray.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes is characterized in that: the vertical pickling tube described in the step 201 is the PVC plastic barrel.
The acid-washing method for internal surfaces of above-mentioned a kind of metal capillary tubes is characterized in that: the acid-washed metal capillary tubes of treating described in the step 1 is pure titanium pipe, titanium alloy pipe or magnesium alloy pipe, when the short period of time stops in the step 202, and time t=2～3 that stopped second.
The present invention compared with prior art has the following advantages:
1, used pickler is simple in structure, processing and fabricating is easy and input cost is low, uses easy and simple to handle.
2, acid washing method is simple and easy to operate, only needs to treat that acid-washed metal capillary bundle bottom fix the vertical pickling tube of insertion inside, back with sealring and carries out pickling and get final product, and used pickle solution is all identical with conventional acid cleaning process with acid washing method and pickling time.
3, reasonable in design, change the horizontal pickling tank of tradition into vertical pickling tube, cooperate the silica gel sealing pad; Acting in conjunction through liquid pressure and capillarity; It is inner to force acid solution to get into metal capillary tubes, accomplishes acid cleaning process, in the acid cleaning process; Be fixed on the silica gel sealing pad of treating pickling tubing head (being top) and play fixed action, be fixed on the silica gel sealing pad of treating pickling tubing afterbody (being the bottom) and play sealing and fixed action (it is at first with treating pickling tubing intrusion acid solution).Particularly: utilization of the present invention is fixed on the silica gel sealing pad of treating pickling tubing afterbody and fixedly treats pickling tubing and combine capillarity; (specifically being under the pressure effect that presses down baffle plate) under external force; Pickle solution in the pickling tube is pressed into treats that the acid-washed metal capillary tubes is inner, accomplish acid cleaning process.Compare with traditional pickling mode; The present invention changes horizontal pickling tank into vertical pickling tube; Through being enclosed within the silica gel sealing pad restriction acid solution flow direction of treating pickling tubing end and pickling tube uniform internal diameter, a branch of many metal capillary bundles of treating pickling are pushed in the middle of sour, in conjunction with capillarity; Acid solution is got in the kapillary, realize the internal surface pickling.Its principle is: be enclosed within tubing to be washed bottom and limited the flow direction of pickle solution with the silica gel sealing pad of vertical pickling tube uniform internal diameter, apply a thrust on tubing top, force acid solution to flow into and treat that pickling tubing is inner; In addition, because the existence of capillarity, pipe internal skin acid solution can impose a pulling force to lower floor's acid solution, and acid solution is risen along capillary wall, when treating that pickling tubing continues to receive the pushing effect immersion of external force, makes the interior acid solution of pipe continue to rise the cleaning pipe material inner wall.Therefore, under the acting in conjunction of these two kinds of conditions, it is inner to make that acid solution gets into metal capillary tubes, accomplishes acid cleaning process.
4, pickling effect is good, can realize that simple, conveniently internal diameter is less than or equal to the acid cleaning process of the metal capillary tubes of 2mm.
5, be fixed as a metal tube bank owing to will treat the acid-washed metal capillary tubes through the silica gel sealing pad, thereby can realize once simultaneously the internal surface of many metal capillary tubes being carried out the acid cleaning process of pickling.
In sum; Novel and reasonable design of the present invention, the acid cleaning process that input cost is low, acid pickling step is simple and it is convenient to realize, pickling effect is good, the easy realization internal diameter of ability is less than or equal to the metal capillary tubes of 2mm, the while can realize once simultaneously the internal surface of many metal capillary tubes being carried out the acid cleaning process of pickling.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Fig. 1 is a user mode reference drawing of the present invention.
Fig. 2 is the used structural representation that presses down baffle plate of the present invention.
Fig. 3 is an acid washing method schema of the present invention.
Description of reference numerals:
1-treats the acid-washed metal capillary tubes; 2-sealring one; The vertical pickling tube of 3-;
4-presses down baffle plate; The 5-handle; 6-acid solution recovering tray;
7-sealring two.
Embodiment
Like Fig. 1, Fig. 2 and shown in Figure 3, the acid-washing method for internal surfaces of a kind of metal capillary tubes of the present invention may further comprise the steps:
Actual when carrying out pickling, the said acid-washed metal capillary tubes 1 of treating is the metal capillary tubes of internal diameter≤2mm.Used sealring 1 is processed by spongy rubber.
201, intubate: with the bundle of metal capillary described in the step 1 from top to bottom straight cutting go into inside and pickle solution is housed and is in the vertical pickling tube 3 of horizontal positioned, the pickle solution of adorning contacts in said metal capillary bundle bottom and vertical pickling tube 3; Said vertical pickling tube 3 is not less than the height of treating acid-washed metal capillary tubes 1 for the cylindrical drum of upper opening and its inner chamber height, and the external diameter of said sealring 1 is identical with the internal diameter of vertical pickling tube 3; Said pickle solution is to treat the generic acid washing lotion that acid-washed metal capillary tubes 1 used material is carried out pickling;
202, the short period of time stops: when the pickle solution of adorning contacts in said metal capillary bundle bottom and the vertical pickling tube 3; Stop intubate and stop t proceeding intubate after second again, the time t that is stopped treats the 1 inner needed time of acid-washed metal capillary tubes for getting into according to the said pickle solution of capillarity second;
203, press pipe: wait to stop t after second, adopt pressing plate said metal capillary Shu Chuizhi to be pressed in the vertical pickling tube 3 again, all immerse fully in the pickle solution of being adorned in the vertical pickling tube 3 from top to bottom until the many said acid-washed metal capillary tubes 1 of treating; And press in the pipe process, should guarantee that sealring 1 is fixed on said metal capillary bundle bottom all the time and around it outer wall closely contact with the inwall of vertical pickling tube 3 all the time.
In the present embodiment; Treat that acid-washed metal capillary tubes 1 is pure titanium (TA2) and the tubing that is of a size of Φ 1.8 * 0.2 * 200mm; And when this tubing is carried out pickling; Proportioning when at first pure titanium (TA2) material being carried out pickling allotment pickle solution by routine, selecting volume ratio here is 3: 1: 6 nitric acid, hydrofluoric acid and the formulated pickle solution of water uniform mixing; Afterwards; After a branch of metal capillary bundle lower end of being made up of 60 TA2 tubing fixed with sealring 1; Bottom perpendicular to straight TA2 tubing in the vertical pickling tube 3 of liquid level insertion downwards of pickle solution contacts with the vertical pickling tube 3 interior pickle solutions of adorning; Keep 2-3 second, treat that promptly used pickle solution enters TA2 tubing inside after, adopt pressing plate to proceed to press pipe from top to bottom again; Press in the pipe process; Should guarantee sealring 1 be fixed on said metal capillary bundle bottom and its all the time around outer wall closely contact with the inwall of vertical pickling tube 3 all the time; Make the pickle solution in the vertical pickling tube 3 to move up gradually through sealring one 2 sealing and fixing effects like this along TA2 tubing; Make pickle solution immerse to treat the TA2 tubing inside of pickling to treat the whole acid cleaning process of the TA2 tubing of pickling with completion, and when carrying out pickling, the TA2 tubing that the pickling time of TA2 tubing being carried out pickling according to routine is treated pickling carries out pickling; After the surface smoothness of TA2 tubing meets the demands, accomplish acid cleaning process.
In the present embodiment, the silica gel sealing pad of said sealring 1 for processing by silica gel, actual when carrying out pickling, the gasket that also can adopt other spongy rubber material is to metal capillary Shu Jinhang sealing and fixing.Said sealring 1 and treat that the vertical range between acid-washed metal capillary tubes 1 bottom is 1cm ± 0.2cm; Actual when carrying out pickling; Also can be according to the concrete needs of reality; With sealring 1 and treat that the vertical range between acid-washed metal capillary tubes 1 bottom adjusts accordingly, as long as guarantee that one 2 couples of metal capillary Shu Jinhang of sealring lock ring is fixing.Said vertical pickling tube 3 is the PVC plastic barrel, in the actual mechanical process, also can select for use other material and pickle solution not to cause corrosive pickling tube as vertical pickling tube 3 to it, and should guarantee that the external diameter of sealring 1 is identical with the internal diameter of vertical pickling tube 3.Simultaneously, actual when carrying out pickling, can also select for use and treat the conventional acid washing lotion that acid-washed metal capillary tubes 1 carries out other type of pickling and carry out pickling.
In the present embodiment; Treat that acid-washed metal capillary tubes 1 is of a size of the tubing of Φ 2.0 * 0.3 * 100mm for magnesiumalloy (AZ31) and its; Proportioning when at first magnesiumalloy (AZ31) material being carried out pickling allotment pickle solution by routine, selecting weight ratio here is 15: 1000 oxalic acid and the formulated pickle solution of water uniform mixing; Afterwards; After a branch of metal capillary bundle lower end of being made up of 40 AZ 31 tubing fixed with sealring 1; Insert downwards in the vertical pickling tube 3 perpendicular to the liquid level of pickle solution that the pickle solution of adorning contacts in the bottom of AZ31 tubing and vertical pickling tube 3; Keep 2-3 second, treat that promptly used pickle solution gets into AZ31 tubing inside after, adopt pressing plate to proceed to press pipe from top to bottom again; Press in the pipe process; Should guarantee sealring 1 be fixed on said metal capillary bundle bottom and its all the time around outer wall closely contact with the inwall of vertical pickling tube 3 all the time; Make the pickle solution in the vertical pickling tube 3 to move up gradually through sealring one 2 sealing and fixing effects like this along AZ31 tubing; Make pickle solution immerse to treat the AZ31 tubing inside of pickling to treat the whole acid cleaning process of the AZ31 tubing of pickling with completion, and when carrying out pickling, the AZ31 tubing that the pickling time of AZ31 tubing being carried out pickling according to routine is treated pickling carries out pickling; After the surface smoothness of AZ31 tubing meets the demands, accomplish acid cleaning process.
In the present embodiment; Before the intubate; Through more than one 2 pairs of sealring treat the bottom of acid-washed metal capillary tubes 1 carry out lock ring fixing after; Also need adopt more than 27 pairs of sealring to treat that the top of acid-washed metal capillary tubes 1 carries out lock ring and fix, the external diameter of said sealring 27 is identical with the internal diameter of vertical pickling tube 3.And; After acid cleaning process finishes; After extracting in the metal capillary bundle free-standing pickling tube 3 that will form by 40 AZ31 tubing and it being inverted, according to step 2 to intubate described in the step 3 and acid washing method said metal capillary bundle is repeated a pickling again.In addition, when carrying out pickling, the volume V of the pickle solution of adorning in the said vertical pickling tube 3
0>=sh-V
1, s is the cross-sectional area of the inner chamber of vertical pickling tube 3 in the formula, h is a height of treating acid-washed metal capillary tubes 1, V
1Be the many TVs of treating acid-washed metal capillary tubes 1.Actual when carrying out pickling, can vertical pickling tube 3 in the volume V of the pickle solutions of adorning
0Adjust accordingly, adorn in the pickle solution but can said metal capillary bundle all be immersed in the vertical pickling tube 3 should guarantee pickling the time.
In the present embodiment, press when pipe, the pressing plate that is adopted be top be provided with handle 5 press down baffle plate 4, the said baffle plate 4 that presses down is not less than the internal diameter of vertical pickling tube 3 for circular slab and its diameter, said vertical pickling tube 3 lies in a horizontal plane on the acid solution recovering tray 6.Said press down baffle plate 4 under be provided with a vertical straight inner bracing piece and press in the pipe process; Vertical straight inner bracing piece is inserted said metal capillary bundle inside; Thereby through sealring 1 with 27 pairs of said metal capillary Shu Jinhang lock rings of sealring fixedly the time; Should suitably leave the insertion space of said vertical straight inner bracing piece, the insertion space of being left simultaneously should not crossed main point and guarantee said metal capillary Shu Jinhang lock ring.The thickness of said sealring 1 is 10mm ± 2mm, and the footpath of sealring 1 wide be 10mm ± 2mm; Said sealring 27 and treat that the vertical range between acid-washed metal capillary tubes 1 top is 1cm ± 0.2cm.During actually operating, can also be to the thickness and wide the adjusting accordingly in footpath of sealring 1 and sealring 27.
In the present embodiment; Treat that acid-washed metal capillary tubes 1 is of a size of the tubing of Φ 1.5 * 0.15 * 500mm for titanium alloy (TLM) and its; Proportioning when at first titanium alloy (TLM) material being carried out pickling allotment pickle solution by routine, selecting volume here frequently is 4: 1: 5 nitric acid, hydrofluoric acid and the formulated pickle solution of water uniform mixing; Afterwards; After a branch of metal capillary bundle lower end of being made up of 100 TLM tubing fixed with sealring 1; Insert downwards in the vertical pickling tube 3 perpendicular to the liquid level of pickle solution that the pickle solution of adorning contacts in the bottom of TLM tubing and vertical pickling tube 3; Keep 2-3 second, treat that promptly used pickle solution gets into TLM tubing inside after, adopt pressing plate to proceed to press pipe from top to bottom again; Press in the pipe process; Should guarantee sealring 1 be fixed on said metal capillary bundle bottom and its all the time around outer wall closely contact with the inwall of vertical pickling tube 3 all the time; Make the pickle solution in the vertical pickling tube 3 to move up gradually through sealring one 2 sealing and fixing effects like this along TLM tubing; Make pickle solution immerse to treat the TLM tubing inside of pickling to treat the whole acid cleaning process of the AZ31 tubing of pickling with completion, and when carrying out pickling, the TLM tubing that the pickling time of TLM tubing being carried out pickling according to routine is treated pickling carries out pickling; After the surface smoothness of TLM tubing meets the demands, accomplish acid cleaning process.
In the present embodiment; Before the intubate; Through more than one 2 pairs of sealring treat the bottom of acid-washed metal capillary tubes 1 carry out lock ring fixing after; Also need adopt more than 27 pairs of sealring to treat that the top of acid-washed metal capillary tubes 1 carries out lock ring and fix, the external diameter of said sealring 27 is identical with the internal diameter of vertical pickling tube 3.And; After acid cleaning process finishes; After extracting in the metal capillary bundle free-standing pickling tube 3 that will form by 40 AZ31 tubing and it being inverted, according to step 2 to intubate described in the step 3 and acid washing method said metal capillary bundle is repeated a pickling again.In addition, when carrying out pickling, the volume V of the pickle solution of adorning in the said vertical pickling tube 3
0>=sh-V
1, s is the cross-sectional area of the inner chamber of vertical pickling tube 3 in the formula, h is a height of treating acid-washed metal capillary tubes 1, V
1Be the many TVs of treating acid-washed metal capillary tubes 1.Actual when carrying out pickling, can vertical pickling tube 3 in the volume V of the pickle solutions of adorning
0Adjust accordingly, adorn in the pickle solution but can said metal capillary bundle all be immersed in the vertical pickling tube 3 should guarantee pickling the time.
In the actual use, can adopt the present invention that the acid-washed metal capillary tubes 1 of treating of other material is carried out pickling, only need during pickling used pickle solution and pickling time adjusted and get final product.Simultaneously; In the intubate process; When the pickle solution of adorning contacts in said metal capillary bundle bottom and the vertical pickling tube 3; Stop intubate and get into treating that the 1 inner needed time of acid-washed metal capillary tubes confirms to stop t second, stop t and proceed intubate after second again according to the said pickle solution of capillarity.
The above; It only is preferred embodiment of the present invention; Be not that the present invention is done any restriction, every technical spirit changes any simple modification, change and the equivalent structure that above embodiment did according to the present invention, all still belongs in the protection domain of technical scheme of the present invention.
Claims (10)
1. the acid-washing method for internal surfaces of a metal capillary tubes is characterized in that this method may further comprise the steps:
Step 1, treat pickling tubing arrangement and fixing: will the many axial alignment of acid-washed metal capillary tubes (1) bottom and the bottom of treating carries out forming an axial metal capillary bundle after lock ring fixes through sealring one (2); Many material, structure and the sizes of treating acid-washed metal capillary tubes (1) are all identical;
Step 2, intubate, its intubate process is following:
201, intubate: with the bundle of metal capillary described in the step 1 from top to bottom straight cutting go into inside and pickle solution is housed and is in the vertical pickling tube (3) of horizontal positioned, the pickle solution of adorning contacts in said metal capillary bundle bottom and vertical pickling tube (3); Said vertical pickling tube (3) is not less than the height of treating acid-washed metal capillary tubes (1) for the cylindrical drum of upper opening and its inner chamber height, and the external diameter of said sealring one (2) is identical with the internal diameter of vertical pickling tube (3); Said pickle solution is for treating the generic acid washing lotion that the used material of acid-washed metal capillary tubes (1) is carried out pickling;
202, the short period of time stops: when the pickle solution of adorning contacts in said metal capillary bundle bottom and the vertical pickling tube (3); Stop intubate and stop t proceeding intubate after second again, the time t that is stopped treats the inner needed time of acid-washed metal capillary tubes (1) for getting into according to the said pickle solution of capillarity second;
203, press pipe: wait to stop t after second, adopt pressing plate said metal capillary Shu Chuizhi to be pressed in the vertical pickling tube (3) again, all immerse fully in the pickle solution of being adorned in the vertical pickling tube (3) from top to bottom until the many said acid-washed metal capillary tubes (1) of treating; And press in the pipe process, should guarantee that sealring one (2) is fixed on said metal capillary bundle bottom all the time and around it outer wall closely contact with the inwall of vertical pickling tube (3) all the time;
Step 3, pickling: after treating that many described in the step 203 treat that acid-washed metal capillary tubes (1) all immerses in the pickle solution fully; Treat the method that the used material of acid-washed metal capillary tubes (1) is carried out pickling according to routine, accomplish the acid cleaning process of treating acid-washed metal capillary tubes (1) internal surface.
2. according to the acid-washing method for internal surfaces of the described a kind of metal capillary tubes of claim 1, it is characterized in that: treat described in the step 1 that acid-washed metal capillary tubes (1) is the metal capillary tubes of internal diameter≤2mm.
3. according to the acid-washing method for internal surfaces of claim 1 or 2 described a kind of metal capillary tubes, it is characterized in that: sealring described in the step 1 one (2) is processed by spongy rubber.
4. according to the acid-washing method for internal surfaces of the described a kind of metal capillary tubes of claim 3, it is characterized in that: the silica gel sealing pad of sealring one (2) described in the step 1 for processing by silica gel.
5. according to the acid-washing method for internal surfaces of claim 1 or 2 described a kind of metal capillary tubes; It is characterized in that: described in the step 1 pass through sealring one (2) to many bottoms of treating acid-washed metal capillary tubes (1) carry out lock ring fixing after, also need adopt sealring two (7) that lock ring is carried out on many tops of treating acid-washed metal capillary tubes (1) and fix; The external diameter of said sealring two (7) is identical with the internal diameter of vertical pickling tube (3).
6. according to the acid-washing method for internal surfaces of the described a kind of metal capillary tubes of claim 5; It is characterized in that: after acid cleaning process described in the step 3 finishes; With extracting in the said metal capillary bundle free-standing pickling tube (3) and, according to step 2 to intubate described in the step 3 and acid washing method said metal capillary bundle being repeated a pickling again with after its inversion.
7. according to the acid-washing method for internal surfaces of claim 1 or 2 described a kind of metal capillary tubes, it is characterized in that: the volume V of the pickle solution of adorning in the vertical pickling tube (3) described in the step 201
0>=sh-V
1, s is the cross-sectional area of the inner chamber of vertical pickling tube (3) in the formula, h is for treating the height of acid-washed metal capillary tubes (1), V
1Be the many TVs of treating acid-washed metal capillary tubes (1).
8. according to the acid-washing method for internal surfaces of claim 1 or 2 described a kind of metal capillary tubes; It is characterized in that: the pressing plate described in the step 203 be top be provided with handle (5) press down baffle plate (4); The said baffle plate (4) that presses down is the internal diameter that circular slab and its diameter are not less than vertical pickling tube (3), and the vertical pickling tube (3) described in the step 201 lies in a horizontal plane on the acid solution recovering tray (6).
9. according to the acid-washing method for internal surfaces of claim 1 or 2 described a kind of metal capillary tubes, it is characterized in that: the vertical pickling tube (3) described in the step 201 is the PVC plastic barrel.
10. according to the acid-washing method for internal surfaces of claim 1 or 2 described a kind of metal capillary tubes; It is characterized in that: the acid-washed metal capillary tubes (1) of treating described in the step 1 is pure titanium pipe, titanium alloy pipe or magnesium alloy pipe; When the short period of time stops in the step 202, time t=2～3 that stopped second.
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| JPS51105927A (en) * | 1975-03-14 | 1976-09-20 | Kobe Steel Ltd | |
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| US5103847A (en) * | 1990-11-13 | 1992-04-14 | Westinghouse Electric Corp. | Device for supporting tube bundles for cleaning |
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