CN109338389B - Groove type pipeline pickling device and method - Google Patents
Groove type pipeline pickling device and method Download PDFInfo
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- CN109338389B CN109338389B CN201811616343.5A CN201811616343A CN109338389B CN 109338389 B CN109338389 B CN 109338389B CN 201811616343 A CN201811616343 A CN 201811616343A CN 109338389 B CN109338389 B CN 109338389B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a groove type pipeline pickling device and method, and belongs to the technical field of pipeline pickling. The tank type pipeline pickling device comprises a pickling tank and an acid-proof pump. The descaling bath is configured to be used for splendid attire pickle, and the descaling bath is inside to be provided with the filter, and the filter separates the inside of descaling bath and forms first cell body and second cell body. The bottom of the first tank body and the bottom of the second tank body have a height difference so that liquid in the first tank body can flow to the second tank body; the first tank body comprises a first end and a second end which are opposite, the bottom of the first tank body is obliquely arranged, liquid at the bottom of the first tank body can flow from the first end to the second end, at least one recessed part is arranged at the bottom of the first tank body, the recessed part extends from the first end to the second end, and the recessed part is used for placing a pipeline to be pickled; the inlet end of the acid-proof pump is communicated with the inside of the second groove body, and the water outlet end of the acid-proof pump is communicated with the inside of the first groove body. Which can effectively carry out acid cleaning on the inside and the outside of the pipeline.
Description
Technical Field
The invention relates to the technical field of pipeline pickling, in particular to a groove type pipeline pickling device and method.
Background
At present, pipelines adopted by a lubricating, hydraulic and other conveying pipeline system need to be subjected to acid cleaning operation before construction, and can be put into the next field installation stage. At present, pipeline acid cleaning is to remove impurities such as grease, rust and welding slag of a pipeline by chemical action by taking acid as a main agent and adding additives made of various chemical elements, so that the pipeline is exposed to metal essence. The existing pipeline pickling process mainly adopts a slotted pickling method and a circulating pickling method. The existing tank type pickling method is to place a pipe with pickling solution in a container filled with pickling solution, but the existing tank type pickling method has poor pickling effect.
Disclosure of Invention
The embodiment of the invention provides a groove type pipeline pickling device and method, which can effectively clean the inside and the outside of a pipeline.
The invention is realized by the following steps:
a trough type pipeline pickling device comprises: a pickling tank and an acid-proof pump.
The pickling tank is configured to contain pickling solution, a filter plate is arranged inside the pickling tank, and the filter plate separates the inside of the pickling tank to form a first tank body and a second tank body; the bottom of the first tank body and the bottom of the second tank body have a height difference so that liquid in the first tank body can flow to the second tank body; the first tank body comprises a first end and a second end which are opposite, the first end is far away from the filter plate, the second end is close to the filter plate, the bottom of the first tank body is obliquely arranged, liquid at the bottom of the first tank body can flow from the first end to the second end, at least one concave part is arranged at the bottom of the first tank body, the concave part extends from the first end to the second end, and the concave part is used for placing a pipeline to be pickled; the inlet end of the acid-proof pump is communicated with the inside of the second groove body, and the water outlet end of the acid-proof pump is communicated with the inside of the first groove body.
In a specific embodiment, each recess is provided with a step, so that when the pipe to be pickled is placed on the step, the bottom of the pipe to be pickled has a gap with the bottom of the recess.
In a specific embodiment, the water outlet end of the acid-proof pump is communicated with the inside of the first groove body through a first pipeline, the first pipeline comprises a main water pipe and a plurality of first branch water pipes, one end of the main water pipe is communicated with the water outlet end of the acid-proof pump, the other end of the main water pipe is communicated with the plurality of first branch water pipes, and each first branch water pipe is communicated with the first groove body.
In a specific embodiment, the water outlet of the first water branch pipe corresponds to the concave part.
In a specific embodiment, first pipeline still includes many second water pipes, and the one end of every second water pipe all communicates with main water pipe, and the other end of every second water pipe all stretches into the inside of first cell body, and the lateral wall in first cell body is installed to the second water pipe, and the one end of every second water pipe all installs high pressure nozzle, and high pressure nozzle is used for spraying water to the bottom of first cell body.
In a specific embodiment, the second branch pipe is arranged at the upper part of the side wall of the first groove body.
In a specific embodiment, a heater for heating the pickling solution is further arranged inside the first tank body.
In a specific embodiment, the opposite two side walls of the pickling tank are provided with sliding grooves, the sliding grooves are arranged along the height direction of the pickling tank, and the filter plate is connected with the sliding grooves in a sliding manner.
A groove type pipeline pickling method is mainly carried out by using a groove type pipeline pickling device and comprises the following steps:
the depressed part is arranged in to the pipeline of will treating the pickling, and the pickling liquid pump sending in acid-proof pump will the second cell body is to first water leg and second water leg, and first water leg is to the inside pickling liquid of inputing of first cell body, and the pickling liquid flows to the second end from first end, treats the inside and the outside of pickling pipeline and pickle, and the pickling liquid of second water leg washes the outside of treating the pickling pipeline through high pressure nozzle, and the pickling liquid that flows to the second end filters through the filter plate and enters into the second cell body.
In a specific embodiment, the pickling solution inside the first tank submerges the pipe to be pickled.
The beneficial effects of the invention at least comprise:
the pipeline of will treating pickling is placed in the depressed part of first cell body, and the pickle in the first cell body can be followed first end flow direction second end, and the mobility of pickle is better, can treat that the pickling pipeline washs betterly. In addition, owing to be provided with the depressed part, then the pickle can flow to the depressed part, because the depressed part extends from first end to second end, the pickle enters into the pipeline of treating the pickling inside at the in-process that the depressed part flows, treats the pickling inside the pipeline of treating the pickling and carries out the pickling to can treat the pickling pipeline washing more effectively. The acid washing solution after being cleaned is filtered by a filter plate and then enters the second tank body, and the acid washing solution in the second tank body is cleaner.
The pickling solution inside the second tank body can be pumped to the inside of the first tank body through the acid-proof pump to continuously pickle the pickling pipeline, the overall fluidity of the pickling solution is enhanced, and the pickling solution can be recycled.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a tank pipeline pickling device provided by an embodiment of the invention;
fig. 2 is a schematic structural view of a first tank provided in an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a pickling tank provided by an embodiment of the invention;
fig. 4 is a schematic structural diagram of a recess provided in an embodiment of the present invention.
Icon: 100-groove type pipeline pickling device; 110-a pickling tank; 111-a first trough; 1111-a first end; 1112-a second end; 111 a-a recess; 111 b-step; 112-a second trough body; 113-a chute; 120-a filter plate; 130-acid resistant pump; 141-a main water pipe; 142-a first lateral conduit; 143-a second branch water pipe; 144-high pressure nozzle.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the word "a" or "an" means that the first feature is directly above or obliquely above the second feature, or that the first feature is merely at a higher level than the second feature.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a tank pipeline pickling device 100. The tank-type pipeline pickling apparatus 100 includes a pickling tank 110 and an acid-proof pump 130.
The pickling tank 110 is mainly used for containing pickling solution, and the pipeline to be cleaned is pickled by the pickling solution. The inside of the pickling tank 110 is provided with a filter plate 120, and the filter plate 120 partitions the inside of the pickling tank 110 to form a first tank body 111 and a second tank body 112, as shown in fig. 1, the first tank body 111 is on the right side of the second tank body 112. The filter plate 120 has a filter hole, and specifically, in the present embodiment, the aperture of the filter hole is 0.1 to 0.5 mm. In other embodiments, the pore size of the filter pores can be designed as desired.
The bottom of the first tank 111 and the bottom of the second tank 112 have a height difference, that is, as shown in fig. 1, the bottom of the first tank 111 is above the bottom of the second tank 112, so that the pickling solution in the first tank 111 can flow to the second tank 112. The first channel 111 includes opposite first and second ends 1111 and 1112, the first end 1111 is distal from the filter plate 120, the second end 1112 is proximal to the filter plate 120, as shown in fig. 1, the first end 1111 is at the right end and the second end 1112 is at the left end. The bottom of the first trough 111 is inclined, that is, as shown in fig. 1, the right end of the bottom of the first trough 111 is higher than the left end of the bottom of the first trough 111, so that the liquid in the bottom of the first trough 111 can flow from the first end 1111 to the second end 1112.
Referring to fig. 2 and 4, the bottom of the first tank 111 is provided with at least one recess 111a, the recess 111a extends from the first end 1111 to the second end 1112, that is, the recess 111a penetrates through the first end 1111 and the second end 1112, and the recess 111a is used for placing a pipe to be pickled. In the present embodiment, the recess 111a extends linearly as a whole. In other embodiments, the extension path of the recess 111a may also be designed according to the specific shape of the pipe to be pickled. The pipeline to be pickled is placed in the concave part 111a of the first tank body 111, the pickling solution in the first tank body 111 can flow from the first end 1111 to the second end 1112, the pickling solution has good fluidity, and the pipeline to be pickled can be well cleaned. In addition, since the recess 111a is provided, the pickling solution can flow to the recess 111a, and since the recess 111a extends from the first end 1111 to the second end 1112, the pickling solution enters the inside of the pipe to be pickled while flowing through the recess 111a, and the inside of the pipe to be pickled is pickled, so that the pipe to be pickled can be cleaned more effectively. The acid washing solution after cleaning is filtered by the filter plate 120 and then enters the second tank 112, and the acid washing solution in the second tank 112 is cleaner.
The inlet end of the acid-proof pump 130 is communicated with the inside of the second tank 112, the water outlet end of the acid-proof pump 130 is communicated with the inside of the first tank 111, specifically, the water outlet end of the acid-proof pump 130 is connected with the first end 1111, and the pickling solution of the acid-proof pump 130 flows into the inside of the first tank 111 from the first end 1111. The pickling solution inside the second tank body 112 can be pumped into the first tank body 111 through the acid-proof pump 130 to continuously pickle the pipeline to be pickled, the overall fluidity of the pickling solution is enhanced, and the pickling solution can be recycled.
Referring to fig. 3, in the embodiment, the opposite two side walls of the pickling tank 110 are both provided with chutes 113, the chutes 113 are disposed along the height direction of the pickling tank 110, and the filter plate 120 is slidably connected with the chutes 113. That is, the filter plate 120 can slide in the height direction of the pickling tank 110. When the pickling solution inside the first tank body 111 needs to be filtered, the filter plate 120 slides to the bottom of the pickling tank 110 along the sliding chute 113, and the pickling solution inside the first tank body 111 can enter the second tank body 112 after being filtered by the filter plate 120. In addition, with the filter 120 along the top of spout 113 slip to descaling bath 110, first cell body 111 and second cell body 112 communicate completely, because the bottom of first cell body 111 has the difference in height with the bottom of second cell body 112, then the pickle in the first cell body 111 can directly flow into in the second cell body 112, the pickle in the first cell body 111 has certain impurity because having pickled the pipeline of waiting to pickle, has in the pickle, the pickle that flows to second cell body 112 can be collected by second cell body 112 and then unified the processing. In order to facilitate the treatment of the pickling solution in the second tank 112, a drain (not shown in the figure) is formed in the bottom of the side wall of the second tank 112, and a drain valve (not shown in the figure) is installed on the drain and is controlled to be opened to discharge the pickling solution in the second tank 112.
Further, referring to fig. 4, in order to make the bottom of the outer wall of the pipe to be pickled have a gap with the bottom of the recess 111a when the pipe to be pickled is placed in the recess 111a, each recess 111a of the present embodiment is provided with a step 111b, so that the pickling solution flowing through the recess 111a can pickle the bottom of the outer wall of the pipe to be pickled, and thus, each part of the pipe to be pickled can be effectively cleaned. Specifically, as shown in fig. 4, the recess 111a of the present embodiment is integrally arc-shaped, the steps 111b are disposed at two opposite sides of the arc-shaped recess 111a, and the top of the step 111b and the bottom of the recess 111a have a height difference, so that when the pipeline 000 to be pickled is placed on the step 111b, a gap is formed between the bottom of the pipeline to be pickled and the bottom of the recess 111a, thereby facilitating the pickling of the outer wall of the pipeline to be pickled.
In addition, a heater (not shown) for heating the pickling solution may be provided inside the first tank 111. Wherein, the power cord of the heater passes through the upper portion of the side wall of the first tank body 111 and is arranged outside the first tank body 111, the power cord is provided with an insulating layer, and the heater is arranged at the bottom of the first tank body 111 to heat the pickling solution in the first tank body 111. Thereby increasing the temperature of the pickling solution and having better pickling effect on the pipeline to be pickled.
Further, in a specific embodiment, the water outlet end of the acid-proof pump 130 is communicated with the inside of the first groove 111 through a first pipeline, the first pipeline includes a main water pipe 141 and a plurality of first branch water pipes 142, one end of the main water pipe 141 is communicated with the water outlet end of the acid-proof pump 130, the other end of the main water pipe 141 is communicated with the plurality of first branch water pipes 142, and each first branch water pipe 142 is communicated with the first groove 111.
The pickling solution is pumped into the main water pipe by the acid-proof pump 130, and the pickling solution in the main water pipe 141 is branched into the plurality of first branch water pipes 142 and is conveyed to the inside of the first tank body 111 through the plurality of first branch water pipes 142. Since the pickling solution is discharged through the plurality of first branch water pipes 142, the pickling solution can flow into the first tank body 111 from different positions, thereby better cleaning the pipeline to be pickled. Specifically, the water outlet of the first branch pipe 142 of the present embodiment corresponds to the recess 111a, so that the pickling solution flowing out of the first branch pipe 142 can directly flow into the recess 111a, and the pipe to be pickled on the recess 111a is better cleaned.
In addition, referring to fig. 2, the first pipeline of the embodiment further includes a plurality of second branch water pipes 143, one end of each second branch water pipe 143 is communicated with the main water pipe 141, the other end of each second branch water pipe 143 extends into the first tank 111, the second branch water pipes 143 are installed on the side wall of the first tank 111, one end of each second branch water pipe 143 is installed with a high pressure nozzle 144, and the high pressure nozzle 144 is used for spraying water to the bottom of the first tank 111.
The pickling solution is pumped into the main water pipe by the acid-proof pump 130, the pickling solution in the main water pipe 141 is divided into a plurality of first branch water pipes 142 and a plurality of second branch water pipes 143, and the pickling solution in the second branch water pipes 143 is sprayed out by the high-pressure nozzles 144 to wash the outer wall of the pipeline to be pickled. It should be noted that the working principle of the high-pressure nozzle 144 is as follows: the high-pressure nozzle 144 gathers the high-pressure pickling solution and air in the high-pressure nozzle through the contraction of the cross section of the inner hole of the high-pressure nozzle during use and then sprays the high-pressure pickling solution and the air rapidly to generate liquid flow with high impact force, so that the outer wall of the pipeline to be pickled is well washed.
In a specific embodiment, in order to ensure that the high pressure nozzle 144 can better wash the outer wall of the pipeline to be pickled, the embodiment is installed at the upper part of the side wall of the first tank body 111. And the high pressure nozzle 144 is arranged obliquely downwards relative to the side wall of the first tank body 111 to ensure that the pickling solution sprayed out by the high pressure nozzle 144 is sprayed to the bottom of the first tank body 111.
The embodiment also provides a method for pickling a groove-type pipeline, which is mainly performed by using a groove-type pipeline pickling device 100, and comprises the following steps:
the pipeline to be pickled is placed in the concave part 111a, the acid-proof pump 130 pumps the pickling solution in the second tank body 112 to the first branch water pipe 142 and the second branch water pipe 143, the pickling solution is input into the first tank body 111 from the first branch water pipe 142, flows to the second end 1112 from the first end 1111, the inside and the outside of the pipeline to be pickled are pickled, the pickling solution in the second branch water pipe 143 is washed outside the pipeline to be pickled through the high-pressure nozzle, the pickling solution flowing to the second end 1112 is filtered through the filter plate 120 and enters the second tank body 112, and then the circulation is carried out. The pickling method can effectively clean the inside and the outside of the pipeline.
In addition, in order to ensure the pickling effect of the pickling solution on the pipeline to be pickled, the pickling solution inside the first tank 111 of the embodiment is immersed in the pipeline to be pickled during the pickling process.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a slot type pipeline acid dip pickle which characterized in that includes:
the pickling tank is configured to contain pickling solution, a filtering plate is arranged inside the pickling tank, and the filtering plate separates the inside of the pickling tank to form a first tank body and a second tank body; the bottom of the first tank body and the bottom of the second tank body have a height difference so that liquid in the first tank body can flow to the second tank body; the first tank body comprises a first end and a second end which are opposite, the first end is far away from the filter plate, the second end is close to the filter plate, the bottom of the first tank body is obliquely arranged, liquid at the bottom of the first tank body can flow from the first end to the second end, at least one concave part is arranged at the bottom of the first tank body, the concave part extends from the first end to the second end, and the concave part is used for placing a pipeline to be pickled; and
the inlet end of the acid-proof pump is communicated with the inside of the second groove body, and the water outlet end of the acid-proof pump is communicated with the inside of the first groove body;
each depressed part is provided with a step, so that when the pipeline to be pickled is placed on the step, a gap is formed between the bottom of the pipeline to be pickled and the bottom of the depressed part; the water outlet end of the acid-resistant pump is communicated with the interior of the first groove body through a first pipeline, the first pipeline comprises a main water pipe and a plurality of first branch water pipes, one end of the main water pipe is communicated with the water outlet end of the acid-resistant pump, the other end of the main water pipe is communicated with the plurality of first branch water pipes, each first branch water pipe is communicated with the first groove body, and the water outlets of the first branch water pipes correspond to the concave parts; the first pipeline still includes many second water pipes, every the one end of the second water pipe all with main water pipe intercommunication, every the other end of the second water pipe all stretches into the inside of first cell body, the second water pipe install in the lateral wall of first cell body, and every high pressure nozzle is all installed to the one end of the second water pipe, high pressure nozzle be used for to the bottom water spray of first cell body, the second water pipe install in the lateral wall upper portion of first cell body.
2. The trough type pipeline pickling device according to claim 1, wherein a heater for heating pickling solution is further arranged inside the first trough body.
3. The trough type pipeline pickling device of claim 1, wherein sliding grooves are formed in two opposite side walls of the pickling tank, the sliding grooves are arranged along the height direction of the pickling tank, and the filter plate is slidably connected with the sliding grooves.
4. A method for pickling a groove-type pipeline, which is carried out by the groove-type pipeline pickling apparatus according to claim 1, comprising:
to treat that the pickling pipeline arranges the depressed part in, the acid-proof pump will pickle pump sending in the second cell body extremely first water pipe with the second water pipe, first water pipe to the inside pickle of inputing of first cell body, the pickle is followed first end flow direction second end is right treat that the inside and the outside of pickling pipeline carry out the pickling, the pickle warp of second water pipe high pressure nozzle is right treat that the outside of pickling pipeline is washed, the flow direction the pickle warp of second end the filter filters and enters into in the second cell body.
5. The method of pickling a trough pipe according to claim 4, wherein the pickling solution inside the first tank submerges the pipe to be pickled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616343.5A CN109338389B (en) | 2018-12-27 | 2018-12-27 | Groove type pipeline pickling device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616343.5A CN109338389B (en) | 2018-12-27 | 2018-12-27 | Groove type pipeline pickling device and method |
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| CN109338389A CN109338389A (en) | 2019-02-15 |
| CN109338389B true CN109338389B (en) | 2021-03-30 |
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| CN201811616343.5A Expired - Fee Related CN109338389B (en) | 2018-12-27 | 2018-12-27 | Groove type pipeline pickling device and method |
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| CN113337830A (en) * | 2021-05-28 | 2021-09-03 | 苏州市安派精密电子有限公司 | Electroplating and pickling device for plate-shaped feeding line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002028603A (en) * | 2000-07-19 | 2002-01-29 | Sumikin Stainless Kokan Kk | Cleaning method for stainless steel pipe before bright annealing |
| CN203096187U (en) * | 2013-01-22 | 2013-07-31 | 东方电气集团东方汽轮机有限公司 | Pipeline inner surface scouring phosphating device |
| CN103305859B (en) * | 2013-06-26 | 2015-06-03 | 南京梅山冶金发展有限公司 | Cyclic acid pickling device and method of trough type pickling tank |
| CN104152933B (en) * | 2014-08-21 | 2016-08-17 | 攀钢集团成都钢钒有限公司 | A kind of seamless pipe acid dip pickle and method |
| CN204174286U (en) * | 2014-09-11 | 2015-02-25 | 邯郸新兴特种管材有限公司 | For the device of bimetal composite seamless steel pipe internal-surface pickling |
| CN204570051U (en) * | 2015-04-30 | 2015-08-19 | 苏州钢特威钢管有限公司 | A kind of stainless steel tube fast acid cleaning device |
| CN205669068U (en) * | 2016-05-18 | 2016-11-02 | 江苏省冶金设计院有限公司 | A kind of circulation flushing formula tubing acid dip pickle |
| CN206916223U (en) * | 2017-05-24 | 2018-01-23 | 浙江永上特材有限公司 | A kind of acid cleaning of steel tube pond |
| CN207596969U (en) * | 2017-12-07 | 2018-07-10 | 浙江铭峰管道装备有限公司 | A kind of circulating stainless steel tube pickling tube of efficient acid solution |
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