CN211445912U - Pickling bath with acid mist recovery function - Google Patents
Pickling bath with acid mist recovery function Download PDFInfo
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- CN211445912U CN211445912U CN201922418735.7U CN201922418735U CN211445912U CN 211445912 U CN211445912 U CN 211445912U CN 201922418735 U CN201922418735 U CN 201922418735U CN 211445912 U CN211445912 U CN 211445912U
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Abstract
The utility model discloses a pickling tank with acid mist recovery function, which comprises a pickling tank, an acid mist condensation recovery mechanism and an acid mist absorption mechanism; the pickling tank comprises a fixed base and a pickling tank body, the pickling tank body is fixedly arranged on the upper end face of the fixed base, an electric telescopic column is further arranged on the upper end face of the fixed base, a supporting arm is arranged at the top of the electric telescopic column, and a pickling tank cover used for covering the pickling tank body is arranged on the lower end face of the supporting arm; acid mist condensation recovery mechanism includes the cooling plate, and the cooling plate is cavity setting and inside circulation has the condensate, and the cooling plate is fixed in pickling capping lower extreme face through elevating system. The utility model discloses a mechanism and acid mist absorbing mechanism cooperation are retrieved in the acid mist condensation, cool off the acid mist in the descaling bath is internal, and acid mist after the cooling back drips the descaling bath again internal to carry out purification treatment after the acid mist suction through acid mist absorbing mechanism with uncooled acid mist, improved the utilization ratio of acidizing fluid when the acid mist is got rid of, reduced manufacturing cost.
Description
Technical Field
The utility model relates to a descaling bath equipment technical field, concretely relates to descaling bath with acid mist retrieves function.
Background
The pickling tank is a container used for holding aqueous solution to remove a metal surface film in a pickling process of a workpiece, is generally used in a production workshop, and has the characteristics of durability, convenience, large workload and the like. The prior pickling tank has the defects that: (1) the opening or closing of the pickling tank cover needs to be completed manually, time and labor are wasted due to the fact that the pickling tank cover is heavy in weight, and acid mist in the pickling tank body is prone to affecting the health of workers when the pickling tank cover is opened or closed; (2) the pickling tank in the prior art does not have the acid mist recovery function, and the reuse rate of the pickling solution is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the above-mentioned not enough, the utility model provides a pickling tank with acid mist recovery function is provided, can go up and down the pickling capping through electric telescopic column and cover the pickling cell body, avoid the acid mist to disperse outward, the labor saving in operation, retrieve the cooperation of mechanism and acid mist absorption mechanism through the acid mist condensation, cool off the acid mist in the pickling cell body, the acid mist after the cooling drops back again in the pickling tank body, and carry out purification treatment after the acid mist suction of will not being refrigerated through acid mist absorption mechanism, the utilization ratio of acidizing fluid has been improved when the acid mist is got rid of, and production cost is reduced.
In order to achieve the purpose, the utility model provides the following technical scheme, a pickling tank with acid mist recovery function, which comprises a pickling tank, an acid mist condensation recovery mechanism and an acid mist absorption mechanism;
the pickling tank comprises a fixed base and a pickling tank body, wherein the pickling tank body is fixedly arranged on the upper end surface of the fixed base, an electric telescopic column is further arranged on the upper end surface of the fixed base, a supporting arm is arranged at the top of the electric telescopic column, and a pickling tank cover used for covering the pickling tank body is arranged on the lower end surface of the supporting arm; the acid mist condensation and recovery mechanism comprises a cooling plate, the cooling plate is arranged in a hollow manner, condensate flows in the cooling plate, and the cooling plate is fixed on the lower end face of the pickling tank cover through a lifting mechanism;
the two opposite side walls in the pickling tank body are respectively provided with a T-shaped air inlet pipe and a T-shaped air exhaust pipe; the T-shaped air inlet pipe comprises a horizontal air inlet pipe and a transverse air inlet pipe which is in a T shape and is in cross communication with the horizontal air inlet pipe, a plurality of air inlets are uniformly formed in the horizontal air inlet pipe, a cold air spray head is mounted on each air inlet, an air outlet of each cold air spray head faces the T-shaped exhaust pipe, and one end of the transverse air inlet pipe extends out of the side wall of the pickling tank body and is connected with an air cooler; the T-shaped air suction pipe comprises a horizontal air suction pipe and a transverse air suction pipe which is in a T shape and is in cross communication with the horizontal air suction pipe, a plurality of air suction openings are uniformly formed in the horizontal air suction pipe, one end of the transverse air suction pipe extends out of the side wall of the pickling tank body and is communicated with the acid mist absorption mechanism through an exhaust fan.
The pickling tank cover can be lifted through the electric telescopic column to cover or open the pickling tank body, and the pickling tank cover can be lifted through the electric telescopic column to cover the pickling tank body in the pickling process, so that the acid mist is prevented from being scattered outside, the body health of staff is ensured, and the operation is labor-saving; the acid mist in the pickling tank body is cooled by matching the cooling plate with the acid mist absorption mechanism, the cooled acid mist is dripped back into the pickling tank body, and the uncooled acid mist is sucked by the acid mist absorption mechanism and then is purified, so that the utilization rate of the acid solution is improved while the acid mist is removed, and the production cost is reduced; furthermore, the acid mist absorption mechanism sucks the acid mist in the pickling tank, and the cold air spray head is arranged on one side of the pickling tank opposite to the air suction opening, and the cold air spray head is combined with cold air blowing during acid mist suction, so that the acid mist collection efficiency and the acid solution utilization rate of the pickling tank with the acid mist recovery function are further improved.
In the pickling tank with the acid mist recycling function, the T-shaped air inlet pipe and the T-shaped exhaust pipe are located on the same horizontal plane.
The T-shaped air inlet pipe and the T-shaped exhaust pipe are positioned on the same horizontal plane, so that the acid mist collection efficiency and the acid liquor utilization rate are further improved.
In the pickling tank with an acid mist recycling function, the cooling plate is located below the horizontal planes of the T-shaped air inlet pipe and the T-shaped air exhaust pipe.
By adopting the technical scheme, the cooling plate is arranged below the horizontal plane where the T-shaped air inlet pipe and the T-shaped air exhaust pipe are located, acid mist generated in the pickling tank body is firstly cooled through the cooling plate, the cooled acid mist drips back into the pickling tank body, the acid mist which is not cooled until the liquid drops rise to the upper part of the cooling plate is continuously cooled under the action of the cold air spray head, the acid mist which is cooled until the liquid drops drips back into the pickling tank body, and the acid mist which is not cooled until the liquid drops is sucked through the acid mist absorption mechanism and then is purified.
Foretell descaling bath with acid mist recovery function, wherein, acid mist absorption mechanism includes acid mist absorption tower and lye tank, acid mist absorption tower includes the tower body, the tower body top is provided with the gas outlet, tower body lateral wall lower extreme is provided with the air inlet, the one end of horizontal exhaust column is stretched out descaling bath body lateral wall is passed through the air exhauster with the air inlet intercommunication, be equipped with alkali lye shower nozzle in the tower body and be located the packing layer of alkali lye shower nozzle below, the lye tank pass through circulating pump A with alkali lye shower nozzle intercommunication.
The pickling tank with the acid mist recycling function comprises a vertical telescopic rod, wherein the vertical telescopic rod is fixed on the lower end face of a pickling tank cover through a telescopic rod mounting seat, the telescopic end of the vertical telescopic rod is fixedly connected with the upper end face of a cooling plate, and the vertical telescopic rod is provided with two vertical telescopic rods which are symmetrically arranged.
Foretell descaling bath with function is retrieved to acid mist, wherein, descaling bath with function is retrieved to acid mist still includes ultrasonic device, ultrasonic device includes supersonic generator and transducer, the even interval of transducer set up in the bottom of pickling groove body, the transducer with the supersonic generator electricity is connected.
The ultrasonic device is added, the pickling reaction speed is accelerated, the using amount of acid liquor is saved, the production cost is reduced, the ultrasonic intensity adjusting reaction is fast, and the defects of over-pickling, under-pickling and the like can be better prevented.
The pickling tank with the acid mist recovery function further comprises an overflow purification device;
overflow purifier includes overflow cell body, filter and circulating pump B, the overflow cell body with a lateral wall of pickling cell body sharing, just the overflow cell body with be equipped with the overflow mouth on the lateral wall of pickling cell body sharing, with the overflow mouth is relative be equipped with pickling solution purification recovery mouth on the lateral wall of pickling cell body, with the overflow mouth is relative be equipped with the pickling solution discharge port on the lateral wall of overflow cell body, the pickling solution discharge port with through pickling solution recovery pipe intercommunication between the pickling solution purification recovery mouth, be equipped with the filter on the pickling solution recovery pipe, the filter with be equipped with on the pickling solution recovery pipe between the pickling solution purification recovery mouth circulating pump B.
By adopting the technical scheme, the pickling liquid in the pickling tank body is circularly purified by the overflow purification device, so that the pickling speed and the pickling effect are improved, the pickling efficiency is improved, and the cost is saved; the using amount of acid liquor is reduced, the discharge amount of waste acid solution is reduced, and the environmental pollution is reduced.
The pickling tank with the acid mist recycling function is characterized in that a polymer acid-resistant filter screen, an activated carbon filter screen and a diatomite filter layer are sequentially arranged in the filter along the liquid inlet direction.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model relates to a pickling bath with function is retrieved to acid mist can go up and down the pickling tank lid through electronic flexible post at the pickling in-process and cover the pickling cell body, avoids the acid mist to scatter outward to staff's healthy, labour saving operation has been guaranteed.
2. The utility model relates to a descaling bath with function is retrieved to acid mist passes through the cooperation of cooling plate and acid mist absorption mechanism, cools off the acid mist of descaling bath internal well, and acid mist after the cooling back drips the descaling bath internal again to carry out purification treatment after the acid mist suction with uncooled acid mist through acid mist absorption mechanism, improved the utilization ratio of acidizing fluid when the acid mist is got rid of, reduced manufacturing cost.
3. The utility model relates to a pickling bath with acid mist recovery function is provided with cold wind shower nozzle in the pickling bath with the opposite one side in suction opening, combines cold wind to blow when sucking acid mist, has further improved the acid mist collection efficiency and the acidizing fluid utilization ratio of the pickling bath with acid mist recovery function of the invention.
4. The utility model relates to a descaling bath with function is retrieved to acid mist increases ultrasonic device on the basis of traditional descaling bath for pickling reaction rate saves the use amount of acidizing fluid, has reduced manufacturing cost, and ultrasonic strength adjusts the reaction fast, can be better prevent the formation of defects such as over-pickling, owe the pickling.
5. The utility model relates to a descaling bath with acid mist retrieves function passes through the internal pickle of overflow purifier circulation purification descaling bath, has improved pickling speed and pickling effect to the efficiency of pickling has been accelerated, has practiced thrift the cost.
Drawings
Fig. 1 is a schematic structural view of a pickling tank having an acid mist recovery function in example 1.
FIG. 2 is a plan view of the pickling tank in example 1.
Fig. 3 is a schematic structural view of an acid mist absorbing mechanism in embodiment 1.
FIG. 4 is a schematic structural view of a pickling tank having an acid mist recovery function in example 2.
FIG. 5 is a schematic view showing the structure of a pickling tank having an acid mist recovery function in example 3.
FIG. 6 is a schematic view showing the structure of a filter in example 3.
The correspondence between each mark and the part name is as follows:
the device comprises a fixed base 1, an acid pickling tank body 2, an electric telescopic column 3, an acid mist absorption mechanism 4, a supporting arm 5, an acid pickling tank cover 6, a cooling plate 7, a T-shaped air inlet pipe 8, a T-shaped air suction pipe 9, a cold air spray head 10, an air cooler 11, an air suction opening 12, an alkali liquor tank 13, a tower body 14, an exhaust fan 15, an alkali liquor spray head 16, a packing layer 17, a circulating pump A18, a vertical telescopic rod 19, an ultrasonic generator 20, an energy converter 21, an overflow tank body 22, a filter 23, a polymer acid-resistant filter screen 2301, an activated carbon filter screen 2302, a diatomite filter layer 2303, a circulating pump B24, an overflow port 25, an acid pickling solution outlet 26, an acid pickling solution purification and recovery.
Detailed Description
In order to make the technical means, the inventive features, the objectives and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings.
Example 1
As shown in fig. 1, 2 and 3, a pickling tank having an acid mist recovery function includes a pickling tank, an acid mist condensation recovery mechanism, and an acid mist absorption mechanism 4.
The pickling tank comprises a fixed base 1 and a pickling tank body 2, the pickling tank body 2 is fixedly arranged on the upper end surface of the fixed base 1, an electric telescopic column 3 is further arranged on the upper end surface of the fixed base 1, a supporting arm 5 is arranged at the top of the electric telescopic column 3, and a pickling tank cover 6 for covering the pickling tank body 2 is arranged on the lower end surface of the supporting arm 5; acid mist condensation recovery mechanism includes cooling plate 7, and cooling plate 7 is cavity setting and inside circulation has the condensate, and cooling plate 7 is fixed in pickling capping 6 lower terminal surface through elevating system.
A T-shaped air inlet pipe 8 and a T-shaped exhaust pipe 9 are respectively arranged on two opposite side walls in the pickling tank body 2; the T-shaped air inlet pipe 8 comprises a horizontal air inlet pipe and a transverse air inlet pipe which is in a T shape and is communicated with the horizontal air inlet pipe in a cross mode, a plurality of air inlets are uniformly formed in the horizontal air inlet pipe, a cold air spray head 10 is installed on each air inlet, an air outlet of the cold air spray head 10 faces to a T-shaped exhaust pipe 9, and one end of the transverse air inlet pipe extends out of the side wall of the pickling tank body 2 and is connected with an air cooler 11; the T-shaped air suction pipe 9 comprises a horizontal air suction pipe and a transverse air suction pipe which is in a T shape and is in cross communication with the horizontal air suction pipe, a plurality of air suction openings 12 are uniformly formed in the horizontal air suction pipe, and one end of the transverse air suction pipe extends out of the side wall of the pickling tank body 2 and is communicated with the acid mist absorption mechanism 4 through an exhaust fan 15.
In this embodiment, the T-shaped air inlet duct 8 and the T-shaped air exhaust duct 9 are located on the same horizontal plane, and the cooling plate 7 in this embodiment may also be located below the horizontal plane where the T-shaped air inlet duct 8 and the T-shaped air exhaust duct 9 are located.
The acid mist absorption mechanism 4 comprises an acid mist absorption tower and an alkali liquor tank 13, the acid mist absorption tower comprises a tower body 14, the top of the tower body 14 is provided with a gas outlet, the lower end of the side wall of the tower body 14 is provided with a gas inlet, one end of a transverse exhaust pipe extends out of the side wall of the pickling tank body 2 and is communicated with the gas inlet through an exhaust fan 15, an alkali liquor spray head 16 and a packing layer 17 positioned below the alkali liquor spray head 16 are arranged in the tower body 14, and the alkali liquor tank 13 is communicated with the alkali liquor.
The lifting mechanism comprises vertical telescopic rods 19, the vertical telescopic rods 19 are fixed on the lower end face of the pickling tank cover 6 through telescopic rod mounting seats, the telescopic ends of the vertical telescopic rods 19 are fixedly connected with the upper end face of the cooling plate 7, the number of the vertical telescopic rods 19 is two, and the two vertical telescopic rods 19 are symmetrically arranged. The height position of the cooling plate is adjusted by means of vertical telescopic rods 19.
When the pickling tank with the acid mist recovery function in the embodiment is used, the electric telescopic column 3 covers the pickling tank body 2 through the lifting pickling tank cover 6 to avoid the acid mist from scattering outside, so that the health of staff is ensured, and the operation is labor-saving; the cooling plate 7 is matched with the acid mist absorption mechanism 4 to cool the acid mist in the pickling tank body 2, the cooled acid mist drops back into the pickling tank body 2, and the acid mist absorption mechanism 4 sucks the uncooled acid mist and then performs purification treatment, so that the utilization rate of the acid solution is improved while the acid mist is removed, and the production cost is reduced; furthermore, the acid mist absorption mechanism 4 sucks the acid mist in the pickling tank body, and the cold air spray head 10 is arranged on one side of the pickling tank body 2 opposite to the air suction opening 12, and the acid mist is sucked and blown in combination with cold air, so that the acid mist collection efficiency and the acid solution utilization rate of the pickling tank with the acid mist recovery function are further improved.
Example 2
As shown in fig. 4, the pickling tank having an acid mist recovery function in the present embodiment is different from that in embodiment 1 in the following points: the pickling tank with the acid mist recovery function in the embodiment further comprises an ultrasonic device, the ultrasonic device comprises an ultrasonic generator 20 and an energy converter 21, the energy converter 21 is uniformly arranged at the bottom of the pickling tank body 2 at intervals, and the energy converter 21 is electrically connected with the ultrasonic generator 20.
The pickling tank with the acid mist recovery function in the embodiment is additionally provided with the ultrasonic device on the basis of the embodiment 1, so that the pickling reaction speed is increased, the using amount of acid liquor is saved, the production cost is reduced, the ultrasonic intensity adjustment reaction is fast, and the defects of over-pickling, under-pickling and the like can be better prevented.
Example 3
As shown in fig. 5 and 6, the pickling tank having an acid mist recovery function in the present embodiment is different from that in embodiment 1 in the following points: the pickling tank with the acid mist recovery function in the embodiment further includes an overflow purification device.
The overflow purification device comprises an overflow tank body 22, a filter 23 and a circulating pump B24, the overflow tank body 22 and the pickling tank body 2 share a side wall, the overflow port 25 is arranged on the side wall shared by the overflow tank body 22 and the pickling tank body 2, a pickling solution purification recovery port 27 is arranged on the side wall of the pickling tank body 2 opposite to the overflow port 25, a pickling solution discharge port 26 is arranged on the side wall of the overflow tank body 22 opposite to the overflow port 25, the pickling solution discharge port 26 is communicated with the pickling solution purification recovery port 27 through a pickling solution recovery pipe 28, the filter 23 is arranged on the pickling solution recovery pipe 28, and the circulating pump B24 is arranged on the pickling solution recovery pipe 28 between the filter 23 and the pickling solution purification recovery port 27.
In this embodiment, a polymer acid-resistant filter 2301, an activated carbon filter 2302, and a diatomite filter 2303 are sequentially disposed in the filter 23 along the liquid inlet direction.
The pickling tank with the acid mist recovery function in the embodiment circularly purifies the pickling liquid in the pickling tank body 2 through the overflow purification device, so that the pickling speed and the pickling effect are improved, the pickling efficiency is improved, and the cost is saved; the using amount of acid liquor is reduced, the discharge amount of waste acid solution is reduced, and the environmental pollution is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A pickling tank with an acid mist recovery function is characterized by comprising a pickling tank, an acid mist condensation recovery mechanism and an acid mist absorption mechanism;
the pickling tank comprises a fixed base and a pickling tank body, wherein the pickling tank body is fixedly arranged on the upper end surface of the fixed base, an electric telescopic column is further arranged on the upper end surface of the fixed base, a supporting arm is arranged at the top of the electric telescopic column, and a pickling tank cover used for covering the pickling tank body is arranged on the lower end surface of the supporting arm; the acid mist condensation and recovery mechanism comprises a cooling plate, the cooling plate is arranged in a hollow manner, condensate flows in the cooling plate, and the cooling plate is fixed on the lower end face of the pickling tank cover through a lifting mechanism;
the two opposite side walls in the pickling tank body are respectively provided with a T-shaped air inlet pipe and a T-shaped air exhaust pipe; the T-shaped air inlet pipe comprises a horizontal air inlet pipe and a transverse air inlet pipe which is in a T shape and is in cross communication with the horizontal air inlet pipe, a plurality of air inlets are uniformly formed in the horizontal air inlet pipe, a cold air spray head is mounted on each air inlet, an air outlet of each cold air spray head faces the T-shaped exhaust pipe, and one end of the transverse air inlet pipe extends out of the side wall of the pickling tank body and is connected with an air cooler; the T-shaped air suction pipe comprises a horizontal air suction pipe and a transverse air suction pipe which is in a T shape and is in cross communication with the horizontal air suction pipe, a plurality of air suction openings are uniformly formed in the horizontal air suction pipe, one end of the transverse air suction pipe extends out of the side wall of the pickling tank body and is communicated with the acid mist absorption mechanism through an exhaust fan.
2. The pickling tank with acid mist recycling function as claimed in claim 1, wherein the T-shaped air inlet pipe and the T-shaped air exhaust pipe are located on the same horizontal plane.
3. The pickling tank with acid mist recycling function as claimed in claim 1, wherein said cooling plate is located below the level of said T-shaped air inlet pipe and said T-shaped air exhaust pipe.
4. The pickling tank with the acid mist recycling function as claimed in claim 1, wherein the acid mist absorbing mechanism comprises an acid mist absorbing tower and an alkali solution tank, the acid mist absorbing tower comprises a tower body, an air outlet is arranged at the top of the tower body, an air inlet is arranged at the lower end of the side wall of the tower body, one end of the transverse exhaust pipe extends out of the side wall of the pickling tank and is communicated with the air inlet through the exhaust fan, an alkali solution nozzle and a packing layer located below the alkali solution nozzle are arranged in the tower body, and the alkali solution tank is communicated with the alkali solution nozzle through a circulating pump A.
5. The pickling tank with the acid mist recycling function of claim 4, wherein the lifting mechanism comprises two vertical telescopic rods, the two vertical telescopic rods are symmetrically arranged, and the vertical telescopic rods are fixed on the lower end face of the pickling tank cover through telescopic rod mounting seats and fixedly connected with the upper end face of the cooling plate.
6. The pickling tank with the acid mist recovery function as claimed in claim 1, wherein the pickling tank with the acid mist recovery function further comprises an ultrasonic device, the ultrasonic device comprises an ultrasonic generator and transducers, the transducers are arranged at the bottom of the pickling tank body at uniform intervals, and the transducers are electrically connected with the ultrasonic generator.
7. The pickling tank with acid mist recovery function as claimed in claim 1, wherein the pickling tank with acid mist recovery function further comprises an overflow purification device;
overflow purifier includes overflow cell body, filter and circulating pump B, the overflow cell body with a lateral wall of pickling cell body sharing, just the overflow cell body with be equipped with the overflow mouth on the lateral wall of pickling cell body sharing, with the overflow mouth is relative be equipped with pickling solution purification recovery mouth on the lateral wall of pickling cell body, with the overflow mouth is relative be equipped with the pickling solution discharge port on the lateral wall of overflow cell body, the pickling solution discharge port with through pickling solution recovery pipe intercommunication between the pickling solution purification recovery mouth, be equipped with the filter on the pickling solution recovery pipe, the filter with be equipped with on the pickling solution recovery pipe between the pickling solution purification recovery mouth circulating pump B.
8. The pickling tank with acid mist recovery function according to claim 7, wherein the filter is provided with a polymer acid-resistant filter screen, an activated carbon filter screen and a diatomite filter screen in sequence along the liquid inlet direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922418735.7U CN211445912U (en) | 2019-12-27 | 2019-12-27 | Pickling bath with acid mist recovery function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922418735.7U CN211445912U (en) | 2019-12-27 | 2019-12-27 | Pickling bath with acid mist recovery function |
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| Publication Number | Publication Date |
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| CN211445912U true CN211445912U (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922418735.7U Active CN211445912U (en) | 2019-12-27 | 2019-12-27 | Pickling bath with acid mist recovery function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115747818A (en) * | 2022-12-02 | 2023-03-07 | 湖南菱瑞新材料科技有限公司 | Novel high-efficient plug-type pickling device |
-
2019
- 2019-12-27 CN CN201922418735.7U patent/CN211445912U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115747818A (en) * | 2022-12-02 | 2023-03-07 | 湖南菱瑞新材料科技有限公司 | Novel high-efficient plug-type pickling device |
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