JP2019210513A - Steel pipe continuous galvanizing device - Google Patents

Abstract

To provide a steel pipe continuous galvanizing device capable of improving plating treatment efficiency.SOLUTION: A steel pipe continuous galvanizing device comprises: a steel pipe transport unit which has a plurality of paddle wheels mounted on a rotary shaft at desired intervals, and is provided rotatably in a molten zinc bathtub to transport a steel pipe in a zinc bath in the bathtub; and a steel pipe supply unit which is provided rotatably at a steel pipe insertion part side of the bathtub, and supplies a steel pipe supplied from a steel pipe insertion part side to the paddle wheels. Each paddle wheel comprises a desired number of paddles provided radially at the desired intervals, and a recessed part for steel pipe insertion which is formed between respective paddles and into which the desired number of steel pipes can be inserted. The supply unit comprises a rotary shaft and a recessed part for insertion into which the desired number of steel pipes can be inserted one after another. Both rotary shafts of both the units are configured to be associatively rotated at a desired speed in a predetermined direction. The steel pipes supplied to the supply unit are inserted into the recessed parts of the paddle wheels by the supply unit, and the steel pipes are transported by the paddle wheels to be plated with molten zinc while passing in the zinc bath.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a steel pipe continuous galvanizing apparatus. More specifically, the present invention relates to a steel pipe continuous galvanizing apparatus for continuously plating a steel pipe with molten zinc.

  Conventionally, as a technology for galvanizing a large number of steel pipes, multiple steel pipes are aligned and bundled together, suspended by a crane, transferred onto a molten zinc bath, and gradually immersed in a zinc bath. The method of performing is generally known. According to this plating method, since the steel pipes are brought into contact with each other and converged, there is a problem (defect) that the adhesion of zinc to the inner and outer surfaces of the steel pipe, particularly the outer surface, cannot be processed smoothly.

  Therefore, as means for solving the above problems, for example, a pair of support frames are attached to the left and right of a fixed frame suspended by a crane so as to be movable in the contact and separation directions, and comb-shaped or grid-shaped holding frames are attached to both support frames. An extendable tool is provided that is detachably provided, and a plurality of steel pipes are arranged substantially in parallel so as not to contact each other, and both ends of each steel pipe are held. Then, the crane is operated in the above state to transfer the extension tool onto the molten zinc bath, the extension tool is lowered, each steel pipe is immersed in a zinc bath and plated, and then the extension tool is pulled up to be cooled, etc. A plating technique for performing post-processing is proposed (see, for example, Patent Document 1).

JP-A-52-123336

  According to the technique (prior art) described in Patent Document 1 described above, a zinc bath (molten zinc) is used in a state in which both ends of each steel pipe are held by holding frames so that a plurality of (many) steel pipes are not brought into contact with each other. Since the plating process is performed by dipping in, the problems (defects) of the conventional example described above can be solved.

  However, even the prior art has the following problems. That is, in the prior art, the crane is operated to lower the expansion tool holding a plurality of steel pipes, each steel pipe is immersed in a zinc bath and plated, and then the expansion tool is pulled up and transferred to a cooling tank or the like for cooling. And so on. Thereafter, the above-described operation is repeated to perform the final treatment, which has a problem of poor plating treatment efficiency.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a steel pipe continuous galvanizing apparatus capable of solving the above-described problems and improving the efficiency of plating treatment.

In order to achieve the above object, one of the present inventions is a molten zinc bath,
A rotating shaft and a paddle wheel for transferring a desired number of steel pipes provided on the rotating shaft with a fixed shaft at a desired interval, and the rotating shaft is rotatably supported in the longitudinal direction in the zinc bath. A steel pipe transfer unit that is arranged to face the steel pipe and transfers the steel pipe immersed in the molten zinc in the zinc bath;
A steel pipe supply unit that is located on the steel pipe insertion part side of the zinc bath and supplies the steel pipe to the paddle wheel of the transfer unit;
A desired number of steel tube pushing levers that are supported and arranged to be slidable in a direction orthogonal to the rotation axis of the transfer unit, and are oscillated at a predetermined timing to push out the steel pipe transferred by the transfer unit from the transfer unit. Means,
A steel pipe placing section for placing the steel pipe to be pushed out of the transfer unit by the lever means, located in the zinc bath positioned opposite to the supply unit;
Each paddle wheel of the transfer unit is formed between a desired number of paddles of substantially the same length arranged radially at a desired substantially same pitch interval, and adjacent paddles, and is supplied from the supply unit. A steel pipe insertion recess capable of inserting a desired number of the steel pipes,
The steel pipe supply unit is formed by twisting a rotary shaft and a desired pitch width capable of receiving a desired number of the steel pipes supplied from the steel pipe insertion portion side, and being fixed to the rotary shaft. And having a desired number of screw means disposed so that the screw side is positioned in the zinc bath and the rotation shaft is rotatably supported in a substantially vertical direction,
The rotary shaft of the transfer unit and the rotary shafts of the screw means of the supply unit are rotationally driven in association with each other at a desired rotational speed.

  According to the above configuration of the present invention, the steel pipes that are sequentially supplied from the steel pipe insertion side in order of the desired number (one or more) are sequentially inserted into the spiral recesses of the screw means.

  In the above case, the specific gravity of the steel pipe (made of iron) and zinc is approximately similar, but since each rotary shaft of each screw means rotates at a desired rotational speed, the steel pipe is accompanied by the rotation of the screw. It is pressed and submerged in the molten zinc (zinc bath), supplied to the steel pipe insertion recess of each paddle wheel of the transfer unit, transferred to the recess and introduced (inserted).

  Since the rotation shaft of the paddle wheel of the transfer unit is rotationally driven in association (interlocking) with the rotation shaft of the screw means at a desired rotation speed, the steel pipe introduced into the steel pipe insertion recess is a paddle. The wheel is pushed by the paddles of the wheel by the rotation of the wheel, and is transferred while being immersed in the zinc bath in the zinc bath. Since the molten zinc flows into the steel pipe during the transfer, the molten zinc uniformly adheres to both the inner and outer surfaces of the steel pipe while passing through the zinc bath and is plated. The immersion time of the steel pipe in the zinc bath can be adjusted by controlling the rotational speed of the rotating shaft of the paddle wheel.

  On the other hand, when the steel pipe is transferred to a predetermined position by the paddle wheel, the steel pipe is pushed out from the transfer unit by the steel pipe pushing lever means and placed on the steel pipe.

  While the above steps can be performed continuously and the steel pipe can be plated while the steel pipe passes through the molten zinc, the efficiency of the plating process can be improved and a good quality galvanized steel pipe can be obtained. it can.

Another invention of the present invention (second invention) is the steel pipe continuous galvanizing apparatus according to the first invention, wherein the steel pipe supply unit is positioned above the transfer unit so as to rotate the rotating shaft of the transfer unit. A rotation shaft provided to be supported in a substantially parallel and rotatable manner, and a fixed shaft mounted on the rotation shaft at a desired interval. The diameter is smaller than the diameter of the paddle wheel for transferring the steel pipe. A paddle wheel for supplying a desired number of steel pipes,
Each paddle wheel is formed between a desired number of paddles of substantially the same length disposed at substantially the same pitch interval as the pitch interval between the paddles of the steel pipe transfer paddle wheel and the adjacent paddles. A steel pipe insertion recess capable of inserting a desired number of steel pipes supplied from the steel pipe insertion portion side,
The rotary shaft of the transfer unit and the rotary shaft of the steel pipe supply unit are rotationally driven in association with each other at a desired rotational speed.

  According to the above configuration of the second aspect of the present invention, the steel pipes that are sequentially supplied from the steel pipe insertion side in order of the desired number (one or more) are sequentially inserted into the steel pipe insertion recesses of each paddle wheel for supplying the steel pipe. Is done.

  And since the rotating shaft of the paddle wheel rotates in a predetermined direction at a desired rotational speed, the steel pipe is pushed by each paddle of the wheel by the rotation of each paddle wheel, and the steel pipe of each paddle wheel of the transfer unit. It is supplied to the recess for insertion and is transferred (introduced) after being transferred to the recess.

  As described above, the steel pipe introduced into the recess for inserting the steel pipe of the paddle wheel of the transfer unit is made of zinc as in the first invention by the rotation of each paddle wheel of the transfer unit thereafter. It is plated while passing through the bath.

  Still another invention of the present invention (third invention) is the steel pipe continuous galvanizing apparatus according to the first and second inventions, wherein the steel pipe continuous galvanizing apparatus is disposed at an upper part on the front part side of the steel pipe mounting part. A magnet roll transfer means for adsorbing and transferring the steel pipe placed on the steel pipe placement portion to a desired portion; and disposed on the desired portion of the zinc bath, and placed on the steel pipe placement portion. The steel pipe is further provided with a steel pipe push-up means for pushing up the steel pipe to be placed to the magnet roll side of the magnet roll transfer means.

  According to the third aspect of the invention, the steel pipe (plated steel pipe) placed on the steel pipe placement portion is sequentially pushed up to the magnet roll side and adsorbed to the magnet roll, and continuously and automatically to the cooling tank and other desired locations. Can be transported automatically.

  In the present invention, the term “paddle” of the paddle wheel is used as a concept including a rod shape, a blade shape of an impeller, and other arbitrary shapes. In addition, the “diameter” of the diameter of the paddle wheel is used as a term meaning a diameter of a virtual circle drawn with the dimension from the rotation center point of the paddle wheel to the tip of the paddle as a radius and the center point as a fulcrum. Yes.

According to the present invention, the following operational effects can be obtained.
(1) A large number of steel pipes can be automatically and continuously immersed in the molten zinc in the molten zinc tank one by one, and can be continuously plated by passing through the molten zinc. Therefore, the efficiency of the plating process can be improved.
(2) Since the entire inner and outer surfaces of the steel pipe can be plated uniformly, a high quality plated steel pipe can be obtained.
(3) The overall height of the plating apparatus can be kept low.
(4) Since the steel pipe is meandered in the zinc tank by the paddle wheel and plated, the depth of the molten zinc tank (zinc pot) can be suppressed.
(5) According to the third invention, in addition to the above effects, the steel pipe (plated steel pipe) plated with the molten zinc in the zinc tank and placed on the steel pipe placing portion is magnetized. It can be pushed up sequentially to the side and adsorbed to a magnet roll, and can be continuously and automatically transferred to a cooling tank or other desired location.

It is an explanatory longitudinal section side view showing roughly the composition of the steel pipe continuous galvanization device of one embodiment of the present invention. FIG. 2 is an explanatory enlarged cross-sectional view schematically showing the configuration cut along the line AA in FIG. 1. It is explanatory drawing which similarly cut | disconnects by the AA line of FIG. 1, and shows an effect | action. FIG. 2 is an explanatory enlarged cross-sectional view schematically showing the configuration cut along the line BB in FIG. 1. FIG. 2 is an explanatory side view schematically showing a configuration of a single steel pipe transfer paddle wheel employed in the apparatus of FIG. 1. It is an explanatory front view showing roughly the composition of the magnet roll of other embodiments adopted for the present invention. It is a description longitudinal cross-section side view which shows roughly the structure of the steel pipe continuous galvanization apparatus of other embodiment of this invention. FIG. 8 is an explanatory enlarged cross-sectional view schematically showing the configuration cut along the line CC in FIG. 7. It is explanatory drawing which similarly cut | disconnects by CC line of FIG. 7, and shows an effect | action. FIG. 8 is an explanatory enlarged cross-sectional view schematically showing the configuration cut along the line DD in FIG. 7.

  Hereinafter, an example of an embodiment of a steel pipe continuous galvanizing apparatus of the present invention will be described with reference to the drawings.

  1 to 5 show a steel pipe continuous galvanizing apparatus according to an embodiment (Embodiment 1) of the present invention.

  As shown in FIGS. 1 to 5, the steel pipe continuous galvanizing apparatus 100 of the present embodiment (Embodiment 1) includes a molten zinc bath 1, a steel pipe transfer unit 2, a steel pipe supply unit 3, and a steel pipe extrusion lever means 4. And a steel pipe placing part 5, a magnet transfer means 6, and a steel pipe push-up means 7.

  The molten zinc bath 1 of the present embodiment is formed in a substantially rectangular box-like tank shape with a desired volume, and the steel pipe P is galvanized with the molten zinc 10 in the zinc bath 1 (also called a zinc melting pot). .

  The steel pipe transfer unit 2 transfers the steel pipe P supplied from the steel pipe supply unit 3 through the molten zinc 10 in the zinc bath 1 in a predetermined direction.

  The transfer unit 2 of the present embodiment includes a rotary shaft 20 and a desired number of steel pipe transfer paddle wheels 21... 21 provided on the rotary shaft 20 with a fixed shaft mounted at a desired interval. In this embodiment, an example in which three paddle wheels are provided is disclosed. And the steel pipe transfer unit 2 is provided so that the said rotating shaft 20 is rotatably supported by the bearing member 22, and is arrange | positioned toward the front-back direction (left-right direction in FIG. 1) in the said zinc bathtub. Note that the number of paddle wheels is not limited to three, and can be arbitrarily increased as desired. In the present invention, the positional relationship between the front side and the rear side of the molten zinc bath 1 will be described by positioning the right side of the bath 1 as “front side” and the left side as “rear side” in FIG.

  The rotating shaft 20 of the transfer unit 2 of the present embodiment is lowered forward in order to make the molten zinc 10 easily flow into the steel pipe when the steel pipe P is submerged in the molten zinc 10 (zinc bath) of the bathtub 1 ( In FIG. 1, it is disposed so as to be inclined and tilted at a desired angle so as to be rotatable.

  Each of the paddle wheels 21 is formed between a desired number of paddles 23... 23 having substantially the same length arranged radially at a desired substantially same pitch interval, and a desired one supplied from a steel pipe supply unit. Steel pipe insertion recesses 24... 24 having a desired size and a desired shape into which several (one to a plurality of desired) steel pipes P can be inserted.

  In the present embodiment, an example in which eight paddles 23 (eight) are provided on each paddle wheel 21 is disclosed. Accordingly, eight recesses 24 are provided. In this case, the quantity of the paddle can be arbitrarily increased or decreased. Moreover, the said recessed part 24 of this embodiment is formed in the approximate U shape.

  The diameter of the paddle wheel 21 can be arbitrarily set according to the thickness and length of the steel pipe P to be galvanized. A shaft hole 25 (see FIG. 5) that fits the rotating shaft 20 is provided at the center of rotation of each paddle wheel. Each paddle wheel is fixedly mounted on the rotary shaft 20 as described above, and is configured to rotate integrally with the rotary shaft 20. In the present embodiment, an alignment plate 27 (see FIG. 1) that is fixedly mounted on the tip of the rotary shaft 20 is provided. The alignment plate 27 is provided to abut the tips of the steel pipes P inserted into the recesses so that the tips of the steel pipes P are aligned.

  As described above, the steel pipe P inserted into each of the recesses 24 is transferred in a predetermined direction while being immersed in the molten zinc 10 in the zinc bath 1 by rotating the rotary shaft 20 by a rotation driving means described later. The molten zinc adheres and is plated while passing through the zinc bath. This point will be further described later.

  The plating apparatus 100 according to this embodiment is a guide member 26 made of a plate-like body or the like that is positioned near each paddle wheel 21 and fixed to a desired portion along the tip of each paddle 23. 26. Each guide member is provided to prevent the steel pipe P inserted into the recess 24 from moving out of the recess during the transfer due to the rotation of the paddle wheel and to guide and transfer it in a predetermined direction. It is.

  The steel pipe supply unit 3 is disposed at the steel pipe insertion portion 30 side of the zinc bath 1 and supplies the steel pipe P to each paddle wheel 23 of the transfer unit 2. The steel pipe P is supplied from the steel pipe insertion part side to the supply unit side at a predetermined timing set by desired means (for example, one or a plurality).

  The supply unit 3 is formed by twisting at a desired pitch width capable of receiving (inserting) a rotation shaft 31 and a desired number of steel pipes supplied from the steel tube insertion portion 30 side. Screw 32 fixed by welding or the like, and a desired number of screws arranged with the screw side positioned in the zinc bath and rotatably supporting the rotary shaft 31 in the vertical direction. Means 33... 33 are provided. In this embodiment, an example in which three screw means are provided is disclosed. Further, each screw means 33 of the present embodiment has the screw 32 disposed so as to surround the rotary shaft 31 with the rotary shaft 31 as the center, and a desired part of the screw is welded to the rotary shaft 31. An example in which it is fixed and configured is disclosed.

  The rotary shafts 20 of the transfer unit and the rotary shafts 31 of the screw means 33 of the supply unit are rotated in a predetermined direction as shown by arrows A and B in FIG. It is configured to be rotationally driven in relation (linked) with the speed. In the present embodiment, as described above, the rotary shaft 20 of the transfer unit 2 is configured to rotate in the direction indicated by the arrow A in FIG. 3 and the rotary shaft 31 of each screw means 33 is rotated in the direction indicated by the arrow B. Has been.

  With the above configuration, the steel pipe P inserted into the spiral recess 34 (insertion portion) of each screw of the screw means is pressed with the rotation of the screw and submerged in the zinc bath of molten zinc, and the transfer unit 2 Are supplied to the steel tube insertion recess 24 of each of the paddle wheels 21 and transferred to the recess for introduction (insertion).

  The rotating shaft 20 of the transfer unit, and hence the rotating shaft 31 of each paddle wheel 21 and each screw means 33 of the supply unit, is at a desired rotational speed set in a predetermined direction by the desired rotational driving means as described above. It is configured to be driven to rotate in conjunction (related).

  In the present embodiment, for example, as shown in FIG. 1 and the like, a motor 80 disposed on the rear side (left side in FIG. 1) of the upper side of the mounting frame 8 fixedly installed on the upper side of the zinc bathtub 1 And a rotating shaft 81 for driving that is rotated by the motor 80 and is supported so as to be rotatable in the front-rear direction of the zinc bath 1.

  The rotating shaft 20 of the paddle wheel 21 of the transfer unit has bevel gears at both ends, and includes a rotating shaft 82 for motion transmission provided in the vicinity of the motor 80 so as to be rotatable in the vertical direction. Is engaged with a bevel gear (not shown) provided on the driving rotary shaft 81 in the gear box 83 and the bevel gear 84 on the other end (lower end) side of the rotary shaft 82 is engaged with the rotary shaft 82 of the paddle wheel. It is meshed with a bevel gear 85 provided at the rear end. Thus, the rotational motion of the drive rotary shaft 81 is transmitted to the rotary shaft 20 of the paddle wheel via the gear box 83, the motion transmission rotary shaft 82, and the bevel gears 84 and 85, and the rotary shaft 20 is transmitted in a predetermined direction. It is comprised so that it may rotate.

  The rotating shaft 31 of each screw means 33 includes a bevel gear (not shown) provided on the rotating shaft 81 for driving and a bevel gear (not shown) attached to the upper end of each rotating shaft 31 in the gear box 86. And the rotational movement of the driving rotary shaft 81 is transmitted to rotate each rotary shaft 31 in a predetermined direction.

  As described above, the rotary shaft 20 of the paddle wheel and the rotary shafts 31 of the screw means are configured to rotate in conjunction (relation). It should be noted that the above-described rotation driving means is disclosed as an example, and it is needless to say that rotation driving means having any configuration other than the above can be adopted. The point is that the rotation axis of the paddle wheel and each rotation axis of each screw means may be configured to rotate in association (relation) with a desired rotation speed in a set predetermined direction.

  If comprised as mentioned above, by operating the motor 80, each paddle wheel 21 and each screw 32 will rotate with the desired speed set in the predetermined direction.

  Therefore, the steel pipe P supplied from the steel pipe insertion portion side is inserted into the spiral concave portion of each screw, pressed with the rotation of the screw, and submerged in the molten zinc, and the steel pipe insertion concave portion 24 of each paddle wheel. And sequentially introduced (inserted) into the recess.

  Then, the steel pipe inserted into the recess is pushed by each paddle of the wheel by the rotation of the paddle wheel, transferred in a state immersed in the zinc bath, and melted while passing through the zinc bath. Plating is performed and plating is performed.

  Accordingly, a large number of steel pipes can be automatically and continuously plated with molten zinc.

  The steel pipe pushing lever means 4 transfers the steel pipe Pa (see FIG. 3), which is transferred in the zinc bath by the transfer unit 2 and plated with molten zinc, from the steel pipe insertion recess 24 of each paddle wheel of the transfer unit 2. It extrudes and sends out to the steel pipe mounting part 5. A desired number of steel pipe pushing lever means 4 are provided.

  Each of the push lever means 4 includes a swing lever 40 arranged so as to be swingable in a direction orthogonal to the rotation shaft 20 of the transfer unit, and a swing drive means for swinging the lever 40 at a predetermined timing. The lever 40 of the present embodiment is arranged to be slidably supported by a support member 41 on a predetermined portion of the frame.

The peristaltic lever 40 of the present embodiment is configured so that the lower half side is formed in a sheath shape and can be expanded and contracted.

  Each pushing lever means 4 of the present embodiment includes a cylinder 42 for lever expansion and contraction and a cylinder 43 for lever movement. The lever 40 is expanded and contracted at a predetermined timing by the cylinder 42, and the lever 40 is swung in the direction orthogonal to the rotary shaft 20 at the predetermined timing with the support portion of the support member 41 as a fulcrum by the cylinder 43. It is configured.

  With the above configuration, each lever 40 of each lever means 4 expands and contracts at a predetermined timing and swings, and is placed when a steel pipe Pa (plated steel pipe) that has been transferred and plated by a paddle wheel is transferred to a predetermined part. The steel pipe Pa is squeezed in the direction of the part 5 to sequentially push out the steel pipe Pa from the recessed part 24 of the paddle wheel and send it out to the mounting part 5.

  The steel pipe pushing lever means 6 described above is disclosed as an example, and can be changed to any configuration other than the above. In short, the steel pipe Pa that has been transferred by the paddle wheel and plated and has reached a predetermined position may be configured to be pushed out from the concave portion of the wheel and sent to a predetermined portion.

  The said steel pipe mounting part 5 is located in the opposite side to the supply unit 3, is provided in the said zinc bathtub 1, and mounts the steel pipe Pa pushed out from a moving unit by a lever means.

  The steel pipe mounting portion 5 of the present embodiment bends the upper end portion of each guide member 26 at a substantially right angle in the direction opposite to the supply unit 3 side, and has its tip along the inner wall surface of the zinc bath 1. It is constructed by bending upward at a substantially right angle and fixing the desired part to the frame or other desired part. Further, the upper end of the guide member 26 on the opposite side and other desired parts are fixed to the frame and other desired parts.

  The steel pipe mounting portion 5 of the present embodiment is configured as described above. Thereby, the steel pipe Pa pushed out (sent out) from the transfer unit 2 by the lever means 4 is arranged and placed. In addition, the said steel pipe mounting part 5 is disclosed as an example, and can be arbitrarily changed into the above structures.

  The magnet roll transfer means 6 is disposed at an upper part on the front part side of the steel pipe placing part 5 (upper side on the right side in FIG. 1) and placed on the steel pipe placing part 5. The steel pipe Pa (plated steel pipe) is adsorbed and transferred to a cooling tank (not shown) or other desired location.

  The magnet roll transfer means 6 includes a desired number of magnet rolls 60. The magnet roll 60 adsorbs the steel pipe Pa, rotates it by a rotation driving means (not shown), and transfers the steel pipe Pa to a desired place. As shown in FIG. 3, each magnet roll 60 of the present embodiment has a plurality (three in the figure) of V-shaped grooves 61... 61 formed on the surface at substantially equal intervals. The steel pipe Pa is separated and adsorbed by 61 and transferred (conveyed).

  As described above, the magnet roll 60 of the present embodiment employs a surface in which a plurality of concave grooves 61 are formed, but the magnet roll 6 forms the concave grooves 61 as shown in FIG. The flat roll-type magnet roll 60 </ b> A may be employed without doing so. This also applies to the embodiments described later.

  The steel pipe push-up means 7 pushes up the steel pipe Pa placed on the steel pipe placing portion 5 sequentially at a predetermined timing (pulls up from the zinc bath) and makes it adsorb to the magnet roll 60.

  The steel pipe pushing-up means 7 of this embodiment is provided with the raising / lowering base member 70 arrange | positioned so that raising / lowering freely was possible in the desired part in the zinc bathtub 1, as shown in FIG. The lifting / lowering base member 70 of the present embodiment is disposed on the front side of the steel pipe mounting portion 5.

  The steel pipe push-up means 7 is configured to move the lifting / lowering base member 70 up and down at a predetermined timing by a lifting and lowering cylinder (not shown). Accordingly, the steel pipe Pa placed on the steel pipe placing portion 5 is pushed up or pulled up and is attracted to the magnet roll 60.

The steel pipe continuous galvanizing apparatus 100 according to the first embodiment is configured as described above, and according to the apparatus according to the first embodiment, the following operational effects can be obtained.
(1) A large number of steel pipes can be automatically and continuously immersed in the molten zinc in the molten zinc tank one by one, and can be continuously plated by passing through the molten zinc. Therefore, the efficiency of the plating process can be improved.
(2) Since the entire inner and outer surfaces of the steel pipe can be plated uniformly, a high quality plated steel pipe can be obtained.
(3) The overall height of the plating apparatus can be kept low.
(4) Since the steel pipe is meandered in the zinc tank by the paddle wheel and plated, the depth of the molten zinc tank (zinc pot) can be suppressed.
(5) The steel pipe (plated steel pipe) plated with the molten zinc in the zinc tank and placed on the steel pipe mounting part is sequentially pushed up to the magnet roll side and adsorbed to the magnet roll, cooling tank and others Can be continuously and automatically transferred to the desired location.

  7 to 10 show a steel pipe continuous galvanizing apparatus according to another embodiment (Embodiment 2) of the present invention. In the second embodiment, components that are the same as those already described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The steel pipe continuous galvanizing apparatus 200 according to Embodiment 2 is characterized by the structure of the steel pipe supply unit.

  The steel pipe supply unit 3A of the second embodiment adopts a paddle wheel system instead of the screw means 33 of the steel pipe supply unit 3 of the first embodiment.

  3 A of steel pipe supply units of Embodiment 2 are arrange | positioned and located in the steel pipe insertion part 30 side of the said zinc bathtub 1. FIG.

  The supply unit 3A is positioned on the upper side of the transfer unit 2 and is provided with a rotary shaft 90 disposed substantially parallel to the rotary shaft 20 of the transfer unit 2, and a fixed shaft mounted on the rotary shaft 90 at a desired interval. Provided with a desired number of paddle wheels 91... 91 for supplying steel pipes. Embodiment 2 discloses an example in which three paddle wheels are provided.

  The supply unit 3 </ b> A is disposed with a rotating shaft 90 rotatably supported by a bearing member 92. Each steel pipe supply paddle wheel 91 has a diameter smaller than that of the steel pipe transfer paddle wheel 21.

  Each paddle wheel 91 has a desired number (five in the figure) of paddle wheels of substantially the same length arranged radially with a pitch interval between the paddles 23 of the paddle wheel 21 for transferring steel pipes. 93... And a desired size and a desired shape formed between the adjacent paddles 93 and capable of inserting a desired number (one to a desired plurality) of steel pipes P supplied from the steel pipe insertion portion 30 side. Steel pipe insertion recesses 94... 94.

  The rotation shaft 90 of the supply unit 3A is configured to be rotated (linked) with the rotation shaft 20 of the transfer unit 3 in association with (relevant to) a desired rotational motion.

  In the second embodiment, for example, as shown in FIG. 7, a vertical rotation shaft 97 that rotates by transmitting the rotation motion of the rotation shaft 82 rotated by the motor 80 via gears 95 and 96 is provided. A bevel gear 98 is provided at the lower end of the rotary shaft 97, and the gear 98 is meshed with a bevel gear attached to the rear end of the rotary shaft 90.

  As described above, the rotation shaft 90 of the supply unit 3 </ b> A is configured to rotate in conjunction with (relate to) the rotation shaft 20 of the transfer unit 2. The supply unit 3 </ b> A is arranged such that each paddle wheel 91 is displaced from each paddle wheel 21 of the transfer unit 3.

  In the second embodiment, as shown in FIG. 9 and the like, the rotation shaft 20 of the transfer unit rotates in the direction indicated by the arrow A, and the rotation shaft 90 of the supply unit rotates in the direction indicated by the arrow C at a desired rotation speed. It is configured to let you. In this case, the rotational speeds of the rotary shafts 20 and 90 are adjusted so that the rotary shafts 20 and 90 are rotated in a state where the paddle 93 of the paddle wheel 91 and the paddle 23 of the paddle wheel 21 overlap in appearance. And configure to set.

  Note that the above-described rotation driving means is disclosed as an example, and rotation driving means having an arbitrary configuration other than the above can be adopted.

  As shown in FIGS. 8 to 10, the plating apparatus 200 according to the second embodiment is positioned near each paddle wheel of the supply unit 3 </ b> A and extends along the tip of the paddle 93 opposite to the steel pipe insertion portion side. Accordingly, there are provided guide members 50... 50 made of a plate-like body or the like fixed and disposed at a desired portion. The guide member 50 is provided to prevent the steel pipe P inserted into the recess 94 from moving to other than the recess during rotation of the paddle wheel, and to guide and transfer it in a predetermined direction. is there.

  With the above configuration, by operating the motor 80, each paddle wheel 91 of the supply unit and each paddle wheel 21 of the transfer unit rotate in conjunction with each other at a desired speed set in a predetermined direction.

  Therefore, the steel pipe P supplied from the steel pipe insertion portion side is inserted into the concave portions 94 of the paddle wheels 91 of the supply unit 3A, transferred as the paddle wheel 91 rotates, and the paddle wheel 21 of the transfer unit 3 is transferred. Are transferred into the recess 24 and sequentially introduced (inserted).

  And the said steel pipe P inserted in the said recessed part 24 is transferred in the state immersed in the zinc bath (molten zinc) similarly to Embodiment 1, and is plated with molten zinc while passing through the zinc bath. Plating.

  Therefore, similarly to the first embodiment, a large number of steel pipes can be automatically and continuously plated with molten zinc. Other configurations are the same as those of the first embodiment.

  The steel pipe continuous galvanizing apparatus according to the second embodiment is configured as described above and is used in the same manner as in the first embodiment. Thereby, there exists an effect similar to Embodiment 1.

  In addition, the steel pipe continuous galvanizing apparatus of each above-described embodiment is disclosed as an example, and the present invention is not limited to the above-described embodiment, and does not go beyond the technical idea described in the claims. It can be changed arbitrarily.

DESCRIPTION OF SYMBOLS 1 Molten zinc bath 2 Steel pipe transfer unit 3 Steel pipe supply unit 3A Steel pipe supply unit 4 Steel pipe pushing lever means 5 Steel pipe mounting part 6 Magnet roll transfer means 8 Frame 10 Molten zinc 20 Rotating shaft 21 Baddle wheel 22 Support member 23 Paddle 24 Steel pipe insertion Recess 26 Guide member 30 Steel pipe insertion part 31 Rotating shaft 32 Screw 33 Screw means 40 Lever 50 Guide member 60 Magnet roll 70 Lifting base member 80 Motor 81 Rotating shaft 84, 85 Bevel gear 90 Rotating shaft 91 Paddle wheel 93 Paddle 94 For steel tube insertion Concave portion 97 Rotating shaft 98, 99 Bevel gear

Claims (3)

A molten zinc bath,
A rotating shaft and a paddle wheel for transferring a desired number of steel pipes provided on the rotating shaft with a fixed shaft at a desired interval, and the rotating shaft is rotatably supported in the longitudinal direction in the zinc bath. A steel pipe transfer unit that is arranged to face the steel pipe and transfers the steel pipe immersed in the molten zinc in the zinc bath;
A steel pipe supply unit that is located on the steel pipe insertion part side of the zinc bath and supplies the steel pipe to the paddle wheel of the transfer unit;
A desired number of steel tube pushing levers that are supported and arranged to be slidable in a direction orthogonal to the rotation axis of the transfer unit, and are oscillated at a predetermined timing to push out the steel pipe transferred by the transfer unit from the transfer unit. Means,
A steel pipe placing section for placing the steel pipe to be pushed out of the transfer unit by the lever means, located in the zinc bath positioned opposite to the supply unit;
Each paddle wheel of the transfer unit is formed between a desired number of paddles of substantially the same length arranged radially at a desired substantially same pitch interval, and adjacent paddles, and is supplied from the supply unit. A steel pipe insertion recess capable of inserting a desired number of the steel pipes,
The steel pipe supply unit is formed by twisting a rotary shaft and a desired pitch width capable of receiving a desired number of the steel pipes supplied from the steel pipe insertion portion side, and being fixed to the rotary shaft. And having a desired number of screw means disposed so that the screw side is positioned in the zinc bath and the rotation shaft is rotatably supported in a substantially vertical direction,
The rotary shaft of the transfer unit and the rotary shafts of the screw means of the supply unit are configured to be rotationally driven in association with each other at a desired rotational speed.
A steel pipe continuous galvanizing device characterized by that. In the steel pipe continuous galvanizing apparatus according to claim 1,
The steel pipe supply unit is mounted on a rotary shaft that is positioned above the transfer unit and supported so as to be substantially parallel and rotatable with the rotary shaft of the transfer unit, and a fixed shaft mounted on the rotary shaft at a desired interval. Provided with a paddle wheel for supplying a desired number of steel pipes, the diameter of which is smaller than the diameter of the paddle wheel for steel pipe transfer,
Each paddle wheel is formed between a desired number of paddles of substantially the same length disposed at substantially the same pitch interval as the pitch interval between the paddles of the steel pipe transfer paddle wheel and the adjacent paddles. A steel pipe insertion recess capable of inserting a desired number of steel pipes supplied from the steel pipe insertion portion side,
The rotary shaft of the transfer unit and the rotary shaft of the steel pipe supply unit are configured to be rotationally driven in association with each other at a desired rotational speed.
A steel pipe continuous galvanizing device characterized by that. In the steel pipe continuous galvanizing apparatus according to claim 1 or 2,
A magnet roll transfer means that is disposed at an upper portion on the front side of the steel pipe placement section, adsorbs the steel pipe placed on the steel pipe placement section and transfers it to a desired section, and the zinc A steel pipe push-up means that pushes the steel pipe placed on the steel pipe placement section to the magnet roll side of the magnet roll transfer means;
A steel pipe continuous galvanizing device characterized by that.

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