Device for spraying water to outer surface of rectangular steel pipe based on rotation

Abstract

The utility model discloses a device for spraying water to the outer surface of a rectangular steel pipe based on rotation, and belongs to the technical field of steel pipe water spraying cooling equipment. The device for spraying water to the outer surface of the rectangular steel pipe based on rotation comprises four first supports, four second supports, two third supports, eight fourth supports, four fifth supports, four sixth supports, eight seventh supports, eighty screws, sixteen rolling bearings, eight wheels and eight hinges. The device can achieve the purpose of spraying water to the outer surface of the rectangular steel pipe moving horizontally, and has the advantages of being low in manufacturing cost, easy to operate and good in using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe water spray cooling equipment, and in particular relates to a device for spraying water on the outer surface of a rectangular steel pipe based on rotation. Background Art

[0002] At present, enterprises usually adopt the method of hot rolling perforation + continuous pipe rolling to produce steel pipes; compared with profiles of other sections, steel pipes have relatively high resistance to bending and torsion; compared with circular steel pipes, rectangular steel pipes have relatively high force-bearing area and stable structural performance. Therefore, rectangular steel pipes are widely used in the fields of mechanical manufacturing and structural engineering. In order to improve the hardness and wear resistance of the outer surface of rectangular steel pipes, it is usually necessary to spray water on the outer surface of rectangular steel pipes to reduce component segregation, uniform structure and refine grains; there are relatively more devices for spraying water on the outer surface of circular steel pipes, but there is no report of devices for spraying water on the outer surface of rectangular steel pipes in the prior art.

[0003] For example: Patent document CN200620081755.X discloses a water spray quenching device for the outer surface of a red-hot steel pipe, which includes a main water pipe, a main valve, a cooling water pipe, a water collecting cylinder, a connecting rod, a base, a regulating valve, a spring, a quenching stand and a supporting wheel. Although the patented device can reuse the refluxed cooling water, the patented device is only suitable for water spray cooling of circular steel pipes, but not for water spray cooling of rectangular steel pipes. Patent document CN201910723610.7 discloses a water spray cooling device for seamless steel pipes, which includes a fixing plate, a connecting shaft, a cooler bracket, a cold water storage tank, a water pump, a connecting seat, a support frame, a waterproof cover and a filter. The working efficiency of the patented device is relatively high, and it can spray water to cool multiple steel pipes, but the patented device is only suitable for water spray cooling of circular steel pipes, but not for water spray cooling of rectangular steel pipes. Patent document CN202121238403.1 discloses a water spray cooling device for steel pipe production with environmental protection function. The patented device includes a device body, a water storage tank, a water inlet pipe, a water pump, a water outlet pipe, a four-way water pipe, a mounting plate and a waste water tank. Although the patented device can reuse the recycled water, the patented device is only suitable for water spray cooling of circular steel pipes, but not for water spray cooling of rectangular steel pipes. Utility Model Content

[0004] In order to overcome one or more problems existing in the prior art, the utility model provides a device for spraying water on the outer surface of a rectangular steel pipe based on rotation. The utility model is designed based on a symmetrical structure. The use of screws can realize the connection between the first bracket and the third bracket, the connection between the second bracket and the fourth bracket, and the connection between the fifth bracket and the fourth bracket; the combined use of the first bracket and the rolling bearing can realize the rotation of the fifth bracket, and the combined use of the sixth bracket and the rolling bearing can realize the rotation of the second bracket; the combined use of the third bracket and the seventh bracket can realize the relative setting of the first bracket and the sixth bracket, and the use of the fourth bracket can realize spraying water on the outer surface of the rectangular steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0005] The technical solution adopted by the utility model to solve its technical problem is as follows.

[0006] The utility model provides a device for spraying water on the outer surface of a rectangular steel pipe based on rotation, comprising: four first brackets, four second brackets, two third brackets, eight fourth brackets, four fifth brackets, four sixth brackets, eight seventh brackets, eighty screws, sixteen rolling bearings, eight wheels and eight hinges;

[0007] The first bracket is composed of two first bodies, two first bosses and one second boss connected together, the first body, the first boss and the second boss are all symmetrical rectangular structures, the two first bodies are arranged opposite to each other, the two first bosses are respectively located outside the two first bodies, and the second boss is located between the two first bodies; the first body is symmetrically provided with two rectangular first through holes, and the eleventh boss of the seventh bracket is penetrated in the first through hole; the upper end face or the lower end face of the first boss is provided with a rectangular first groove, and the wheel is penetrated in the first groove; the left and right sides of the first groove are respectively provided with a cylindrical second through hole, and the hinge is penetrated in the second through hole; the second boss is symmetrically provided with four first screw holes, and the screw is screwed in the first screw hole; the left end face of the second boss is symmetrically provided with two cylindrical second grooves, and the rolling bearing is penetrated in the second groove; a cylindrical third through hole is provided at the axial position of the second groove, and the second bearing segment of the fifth bracket is penetrated in the third through hole;

[0008] The second bracket is composed of two second bodies, two first bearing sections and two third bosses. The second bodies and the third bosses are both rectangular parallelepiped symmetrical structures. The two second bodies are arranged opposite to each other. The two first bearing sections are respectively located outside the two second bodies, and the two third bosses are simultaneously located between the two second bodies. The first bearing section is a cylindrical symmetrical structure, and the first bearing section is sleeved with the rolling bearing. A rectangular first through groove can be formed between the two third bosses, and the fourth bracket is penetrated in the first through groove. The third boss is symmetrically provided with four cylindrical fourth through holes, and the screws are penetrated in the fourth through holes.

[0009] The third bracket is composed of a third body and four fourth bosses, the third body and the fourth bosses are both rectangular parallelepiped symmetrical structures, and the four fourth bosses are simultaneously located on the rear end surface of the third body; a fifth rectangular through hole is provided in the middle of the third body, and a rectangular steel pipe is passed through the fifth through hole; the fourth boss is provided with two sixth cylindrical through holes, and the screws are passed through the sixth through holes;

[0010] The fourth bracket is composed of a fourth body, four fifth bosses and two sixth bosses, the fourth body and the fifth boss are both rectangular parallelepiped symmetrical structures, the four fifth bosses are respectively located at the left and right ends of the fourth body, and the two sixth bosses are simultaneously located on the upper end surface of the fourth body; a rectangular parallelepiped cavity is provided inside the fourth body, and the cavity is used to hold water; three rows of cylindrical seventh through holes are evenly provided on the lower end surface of the fourth body, which are used as water outlet holes; the fifth boss is symmetrically provided with two second screw holes, and the screws are screwed into the second screw holes; the sixth boss is a cylindrical symmetrical structure, and a cylindrical eighth through hole is provided at the axial position of the sixth boss, which is used as a water inlet hole, and the eighth through hole also runs through the fourth body;

[0011] The fifth bracket is composed of two fifth bodies, two second bearing segments and two seventh bosses. The fifth body and the seventh boss are both rectangular parallelepiped symmetrical structures. The two fifth bodies are arranged opposite to each other. The two second bearing segments are respectively located outside the two fifth bodies, and the two seventh bosses are simultaneously located between the two fifth bodies. The second bearing segment is a cylindrical symmetrical structure, and the rolling bearing is sleeved on the second bearing segment. A rectangular second through groove can be formed between the two seventh bosses, and the fourth bracket is penetrated in the second through groove. The seventh boss is symmetrically provided with four cylindrical ninth through holes, and the screw is penetrated in the ninth through hole.

[0012] The sixth bracket is composed of two sixth bodies, four eighth bosses and one ninth boss connected together. The sixth body, the eighth boss and the ninth boss are all rectangular symmetrical structures. The two sixth bodies are arranged opposite to each other. The four eighth bosses are divided into two groups and are respectively located outside the two sixth bodies, and the ninth boss is located between the two sixth bodies; a rectangular third through groove can be formed between the two eighth bosses in each group, and the first body of the first bracket is penetrated in the third through groove; the eighth boss is provided with a rectangular tenth through hole, and the eleventh boss of the seventh bracket is penetrated in the tenth through hole; the upper end surface of the ninth boss is symmetrically provided with two cylindrical third grooves, and the rolling bearing is penetrated in the third groove; a cylindrical eleventh through hole is provided at the axial position of the third groove, and the first bearing section of the second bracket is penetrated in the eleventh through hole;

[0013] The seventh bracket is composed of an eighth body and an eleventh boss connected together. The eighth body and the eleventh boss are both rectangular parallelepiped symmetrical structures. The eleventh boss is located on the lower end surface of the eighth body.

[0014] In some embodiments, the screw is composed of a coaxial seventh body and a tenth boss, the seventh body and the tenth boss are both cylindrical symmetrical structures, and the tenth boss is located on the right end face of the seventh body; the end of the tenth boss is provided with a thread for screwing into the first screw hole of the first bracket or the second screw hole of the fourth bracket.

[0015] In some embodiments, the rolling bearing, the wheel and the hinge are all standard parts.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1) The device for spraying water on the outer surface of a rectangular steel pipe based on rotation provided by the utility model includes four first brackets, four second brackets, two third brackets, eight fourth brackets, four fifth brackets, four sixth brackets, eight seventh brackets, eighty screws, sixteen rolling bearings, eight wheels and eight hinges. Since the material is common and easy to process and shape, the manufacturing cost of the device of the utility model is relatively low.

[0018] 2) When the utility model is used, the two fifth through holes of the two third brackets are aligned with the ports of the horizontally arranged rectangular steel pipe, and water is simultaneously injected into the sixteen eighth through holes of the eight fourth brackets. The rectangular steel pipe is uniformly moved backward in the horizontal direction so that the rectangular steel pipe is inserted into the fifth through holes of the third bracket at the front end. The eight first bearing segments of the four second brackets are simultaneously rotated to control the spray direction of water on the left and right sides of the rectangular steel pipe. The eight second bearing segments of the four fifth brackets are simultaneously rotated to control the spray direction of water on the upper and lower sides of the rectangular steel pipe. Therefore, the operation of the utility model device is relatively simple.

[0019] 3) The utility model is designed based on a symmetrical structure. The use of screws can realize the connection between the first bracket and the third bracket, the connection between the second bracket and the fourth bracket, and the connection between the fifth bracket and the fourth bracket; the combined use of the first bracket and the rolling bearing can realize the rotation of the fifth bracket, and the combined use of the sixth bracket and the rolling bearing can realize the rotation of the second bracket; the combined use of the third bracket and the seventh bracket can realize the relative setting of the first bracket and the sixth bracket, and the use of the fourth bracket can realize water spraying on the outer surface of the rectangular steel pipe. Therefore, the use effect of the device of the utility model is relatively good.

[0020] The device for spraying water on the outer surface of a rectangular steel pipe based on rotation provided by the utility model can achieve the purpose of spraying water on the outer surface of a horizontally moving rectangular steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the device for spraying water on the outer surface of a rectangular steel pipe based on a rotation type according to the utility model;

[0022] Figure 2 It is a left-side structural schematic diagram of a device for spraying water on the outer surface of a rectangular steel pipe based on a rotation type according to the utility model;

[0023] Figure 3 It is a schematic diagram of the top view of the structure of the device for spraying water on the outer surface of a rectangular steel pipe based on rotation in the utility model;

[0024] Figure 4 This is a schematic diagram of the main structure of the first bracket and the wheel after being assembled in the utility model;

[0025] Figure 5 It is a left-side structural schematic diagram of the first bracket and the wheel of the utility model after being assembled;

[0026] Figure 6 It is a schematic diagram of the top view of the structure of the first bracket of the utility model;

[0027] Figure 7 This is a schematic diagram of the main structure of the second bracket of the utility model;

[0028] Figure 8 It is a left-side structural schematic diagram of the second bracket of the utility model;

[0029] Fig. 9 This is a schematic diagram of the main structure of the third bracket of the utility model;

[0030] Fig.10 It is a left-side structural schematic diagram of the third bracket of the utility model;

[0031] Fig.11 This is a schematic diagram of the main structure of the fourth bracket of the utility model;

[0032] Fig.12 It is a schematic cross-sectional structural diagram of the fourth bracket of the utility model along the MM plane;

[0033] Fig.13 It is a schematic diagram of the top view of the structure of the fourth bracket of the utility model;

[0034] Fig.14 It is a bottom view structural schematic diagram of the fourth bracket of the utility model;

[0035] Fig.15 This is a schematic diagram of the main structure of the fifth bracket of the utility model;

[0036] Fig.16 It is a top view structural schematic diagram of the fifth bracket of the utility model;

[0037] Fig.17 This is a schematic diagram of the main structure of the sixth bracket of the utility model;

[0038] Fig.18 It is a left-side structural schematic diagram of the sixth bracket of the utility model;

[0039] Fig.19 It is a schematic diagram of the top view of the sixth bracket of the utility model;

[0040] Fig. 20 This is a schematic diagram of the main structure of the screw of the utility model;

[0041] Fig.21 This is a schematic diagram of the main structure of the seventh bracket of the utility model;

[0042] Fig. 22 The utility model is a schematic diagram of the working principle of the device for spraying water on the outer surface of a rectangular steel pipe based on rotation.

[0043] Description of the reference numerals: 1-first bracket; 101-first body; 102-first boss; 103-second boss; 104-first through hole; 105-first groove; 106-second through hole; 107-second groove; 108-third through hole; 109-first screw hole; 2-second bracket; 201-second body; 202-first bearing section; 203-third boss; 204-first through groove; 205-fourth through hole; 3-third bracket; 301-third body; 302-fourth boss; 303-fifth through hole; 304-sixth through hole; 4-fourth bracket; 401-fourth body; 402-fifth boss; 403-sixth boss; 404- Cavity; 405-seventh through hole; 406-second screw hole; 407-eighth through hole; 5-fifth bracket; 501-fifth body; 502-second bearing section; 503-seventh boss; 504-second through groove; 505-ninth through hole; 6-sixth bracket; 601-sixth body; 602-eighth boss; 603-ninth boss; 604-third through groove; 605-tenth through hole; 606-third groove; 607-eleventh through hole; 7-screw; 701-seventh body; 702-tenth boss; 8-seventh bracket; 801-eighth body; 802-eleventh boss; 9-rolling bearing; 10-wheel; 11-hinge; 12-rectangular steel pipe. DETAILED DESCRIPTION

[0044] The content of the utility model is described in detail below through examples and drawings. The examples are only used to understand the utility model, but are not intended to limit the content of the utility model.

[0045] Combination Figures 1 to 3As shown, the utility model provides a device for spraying water on the outer surface of a rectangular steel pipe based on rotation, which includes four first brackets 1, four second brackets 2, two third brackets 3, eight fourth brackets 4, four fifth brackets 5, four sixth brackets 6, eight seventh brackets 8, eighty screws 7, sixteen rolling bearings 9, eight wheels 10 and eight hinges 11; wherein, eight wheels 10 are inserted into the eight first grooves 105 of the four first brackets 1 and are hinged by the eight hinges 11; eight rolling bearings 9 are inserted into the eight second grooves 107 of the four first brackets 1, and eight second bearing sections 502 of the four fifth brackets 5 are inserted into the eight rolling bearings 9; four second through grooves 504 of the four fifth brackets 5 are inserted into The fourth brackets 4 are penetrated by the thirty-two screws 7; the eight first bodies 101 of the four first brackets 1 are inserted into the eight third through grooves 604 of the four sixth brackets 6, and are connected by the eight seventh brackets 8; the eight rolling bearings 9 are inserted into the eight third grooves 606 of the four sixth brackets 6, and the eight first bearing sections 202 of the four second brackets 2 are inserted into the eight rolling bearings 9; the four fourth brackets 4 are inserted into the four first through grooves 204 of the four second brackets 2, and are connected by the thirty-two screws 7; the four second bosses 103 of the four first brackets 1 are inserted between the eight fourth bosses 302 of the two third brackets 3, and are connected by the sixteen screws 7.

[0046] The assembly process of the device provided by the utility model for spraying water on the outer surface of a rectangular steel pipe based on rotation:

[0047] Combination Figures 1 to 21 As shown, firstly, eight wheels 10 are inserted into the eight first grooves 105 of the four first brackets 1, and the eight axial holes of the eight wheels 10 are aligned with the eight second through holes 106 of the four first brackets 1, and then eight hinges 11 are installed in the eight groups of aligned through holes, so that the four first brackets 1 and the eight wheels 10 can be assembled;

[0048] Then, the four fourth brackets 4 are respectively inserted into the four second through slots 504 of the four fifth brackets 5, and the thirty-two second screw holes 406 of the four fourth brackets 4 are aligned with the thirty-two ninth through holes 505 of the four fifth brackets 5, and then the thirty-two screws 7 are passed through the thirty-two ninth through holes 505 and screwed into the thirty-two second screw holes 406, so that the four fourth brackets 4 and the four fifth brackets 5 can be assembled;

[0049] Then, one rolling bearing 9 is installed in each of the eight second grooves 107 of the four first brackets 1, and then the eight second grooves 107 of the four first brackets 1 are arranged opposite to each other in pairs, and then the eight second bearing segments 502 of the four fifth brackets 5 are inserted into the eight rolling bearings 9, so that the four first brackets 1, the eight rolling bearings 9 and the four fifth brackets 5 can be assembled;

[0050] Then, the four second bosses 103 of the four first brackets 1 are respectively inserted between the eight fourth bosses 302 of the two third brackets 3, and the sixteen sixth through holes 304 of the two third brackets 3 are aligned with the sixteen first screw holes 109 of the four first brackets 1, and then the sixteen screws 7 are passed through the sixteen sixth through holes 304 and screwed into the sixteen first screw holes 109, so that the four first brackets 1 and the two third brackets 3 can be assembled;

[0051] Then, the other four fourth brackets 4 are respectively inserted into the four first through slots 204 of the four second brackets 2, and the thirty-two second screw holes 406 of the four fourth brackets 4 are aligned with the thirty-two fourth through holes 205 of the four second brackets 2, and then the thirty-two screws 7 are passed through the thirty-two fourth through holes 205 and screwed into the thirty-two second screw holes 406, so that the other four fourth brackets 4 and the four second brackets 2 can be assembled;

[0052] Then, one rolling bearing 9 is installed in each of the eight third grooves 606 of the four sixth brackets 6, and then the eight third grooves 606 of the four sixth brackets 6 are arranged opposite to each other in pairs, and then the eight first bearing sections 202 of the four second brackets 2 are inserted into the eight rolling bearings 9, so that the four sixth brackets 6, the eight rolling bearings 9 and the four second brackets 2 can be assembled;

[0053] Then, the eight first bodies 101 of the four first brackets 1 are inserted between the eight third through grooves 604 of the four sixth brackets 6, and the sixteen tenth through holes 605 of the four sixth brackets 6 are aligned with the eight first through holes 104 of the four first brackets 1, and then the eight eleventh bosses 802 of the eight seventh brackets 8 are successively inserted into the sixteen tenth through holes 605 and the eight first through holes 104. In this way, the whole device is assembled and can be put into use.

[0054] The working principle of the device provided by the utility model for spraying water on the outer surface of a rectangular steel pipe based on rotation is as follows:

[0055] Combination Fig. 22 As shown, since the device of the utility model is designed with a symmetrical structure, for the convenience of description, the fourth bracket 4 is set to A, the contact point between the water and the rectangular steel pipe 12 is set to O, and the moving direction of the rectangular steel pipe 12 is set to B. The angle formed by the direction of the water spray and the moving direction of the rectangular steel pipe 12 is set to ∠AOB, and the size of ∠AOB has the following three situations:

[0056] ①∠AOB is an acute angle, so we may set ∠AOB to ∠A1O1B, that is, 0<∠A1O1B<90 degrees;

[0057] ②∠AOB is a right angle, so we can set ∠AOB to ∠A2O2B, that is, ∠A2O2B = 90 degrees;

[0058] ③∠AOB is an obtuse angle. We may set ∠AOB to ∠A3O3B, that is, 90 degrees <∠A3O3B <180 degrees.

[0059] The utility model provides a method for using a device for spraying water on the outer surface of a rectangular steel pipe based on rotation:

[0060] Combination Figures 1 to 3 As shown, firstly, the device for spraying water on the outer surface of a rectangular steel pipe based on rotation provided by the utility model is set on a horizontal ground, and it is ensured that the two fifth through holes 303 of the two third brackets 3 are directly opposite to the port of the horizontally set rectangular steel pipe 12, and then water is injected into the sixteen eighth through holes 407 of the eight fourth brackets 4 at the same time, and then the rectangular steel pipe 12 is moved backward at a uniform speed in the horizontal direction so as to pass the rectangular steel pipe 12 through the fifth through hole 303 of the third bracket 3 located at the front end. In this process, the eight first bearing segments 202 of the four second brackets 2 are rotated at the same time to control the spray direction of water on the left and right sides of the rectangular steel pipe 12, and the eight second bearing segments 502 of the four fifth brackets 5 are rotated at the same time to control the spray direction of water on the upper and lower sides of the rectangular steel pipe 12.

[0061] Supplementary explanation: The device provided by the utility model for spraying water on the outer surface of a rectangular steel pipe based on rotation is designed with a symmetrical structure. First, according to the outer diameter specifications of the rectangular steel pipe, the setting height of the rectangular steel pipe and the wall thickness specifications of the rectangular steel pipe, multiple specifications of the utility model device should be designed and manufactured to match it.

[0062] It can be seen from the embodiments that the device for spraying water on the outer surface of a rectangular steel pipe based on rotation provided by the utility model can achieve the purpose of spraying water on the outer surface of a horizontally moving rectangular steel pipe. The device of the utility model has the characteristics of low manufacturing cost, simple operation and good use effect.

[0063] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein.

Claims

1. A device for spraying water on the outer surface of a rectangular steel pipe based on rotation, characterized in that: The device for spraying water on the outer surface of a rectangular steel pipe based on rotation comprises: four first brackets (1), four second brackets (2), two third brackets (3), eight fourth brackets (4), four fifth brackets (5), four sixth brackets (6), eight seventh brackets (8), eighty screws (7), sixteen rolling bearings (9), eight wheels (10) and eight hinges (11), wherein: The first bracket (1) is composed of two first bodies (101), two first bosses (102) and a second boss (103) connected together; the first bodies (101), the first boss (102) and the second boss (103) are all rectangular parallelepiped symmetrical structures; the two first bodies (101) are arranged opposite to each other; the two first bosses (102) are respectively located outside the two first bodies (101); the second boss (103) is located between the two first bodies (101); the first body (101) is symmetrically provided with two rectangular parallelepiped first through holes (104); the first through holes (104) are penetrated by the eleventh boss (802) of the seventh bracket (8); the upper end surface or the lower end surface of the first boss (102) is provided with a rectangular parallelepiped first groove (105), the wheel (10) is penetrated in the first groove (105); a cylindrical second through hole (106) is respectively formed on the left and right sides of the first groove (105), and the hinge (11) is penetrated in the second through hole (106); the second boss (103) is symmetrically formed with four first screw holes (109), and the screws (7) are screwed in the first screw holes (109); two cylindrical second grooves (107) are symmetrically formed on the left end surface of the second boss (103), and the rolling bearing (9) is penetrated in the second groove (107); a cylindrical third through hole (108) is formed at the axial position of the second groove (107), and the second bearing section (502) of the fifth bracket (5) is penetrated in the third through hole (108); The second bracket (2) is composed of two second bodies (201), two first bearing sections (202) and two third bosses (203) connected together; the second bodies (201) and the third bosses (203) are both rectangular parallelepiped symmetrical structures; the two second bodies (201) are arranged opposite to each other; the two first bearing sections (202) are respectively located outside the two second bodies (201); the two third bosses (203) are simultaneously located between the two second bodies (201); the first bearing section (202) is a cylindrical symmetrical structure; the first bearing section (202) is sleeved with the rolling bearing (9); a rectangular parallelepiped first through groove (204) can be formed between the two third bosses (203); the first through groove (204) is penetrated by the fourth bracket (4); the third boss (203) is symmetrically provided with four cylindrical fourth through holes (205); the screws (7) are penetrated by the fourth through holes (205); The third bracket (3) is composed of a third body (301) and four fourth bosses (302) connected together. The third body (301) and the fourth bosses (302) are both rectangular parallelepiped symmetrical structures. The four fourth bosses (302) are simultaneously located on the rear end surface of the third body (301); a fifth rectangular through hole (303) is provided in the middle of the third body (301), and a rectangular steel pipe is passed through the fifth through hole (303); the fourth boss (302) is provided with two sixth cylindrical through holes (304), and the screws (7) are passed through the sixth through holes (304); The fourth bracket (4) is composed of a fourth body (401), four fifth bosses (402) and two sixth bosses (403) connected together; the fourth body (401) and the fifth bosses (402) are both rectangular parallelepiped symmetrical structures; the four fifth bosses (402) are respectively located at the left and right ends of the fourth body (401); the two sixth bosses (403) are simultaneously located on the upper end surface of the fourth body (401); a rectangular parallelepiped cavity (404) is provided inside the fourth body (401); the cavity (404) The fourth body (401) is used for containing water; the lower end surface of the fourth body (401) is evenly provided with three rows of cylindrical seventh through holes (405) used as water outlets; the fifth boss (402) is symmetrically provided with two second screw holes (406), and the screws (7) are screwed into the second screw holes (406); the sixth boss (403) is a cylindrical symmetrical structure, and the axis position of the sixth boss (403) is provided with a cylindrical eighth through hole (407) used as a water inlet, and the eighth through hole (407) also runs through the fourth body (401); The fifth bracket (5) is composed of two fifth bodies (501), two second bearing sections (502) and two seventh bosses (503) connected together. The fifth body (501) and the seventh boss (503) are both rectangular parallelepiped symmetrical structures. The two fifth bodies (501) are arranged opposite to each other. The two second bearing sections (502) are respectively located outside the two fifth bodies (501), and the two seventh bosses (503) are simultaneously located between the two fifth bodies (501); the second bearing section (502) is a cylindrical symmetrical structure, and the second bearing section (502) is sleeved with the rolling bearing (9); a rectangular parallelepiped second through groove (504) can be formed between the two seventh bosses (503), and the fourth bracket (4) is penetrated in the second through groove (504); the seventh boss (503) is symmetrically provided with four cylindrical ninth through holes (505), and the screw (7) is penetrated in the ninth through hole (505); The sixth bracket (6) is composed of two sixth bodies (601), four eighth bosses (602) and one ninth boss (603), the sixth body (601), the eighth boss (602) and the ninth boss (603) are all rectangular parallelepiped symmetrical structures, the two sixth bodies (601) are arranged opposite to each other, the four eighth bosses (602) are divided into two groups, and are respectively located outside the two sixth bodies (601), and the ninth boss (603) is located between the two sixth bodies (601); a rectangular parallelepiped third through groove (604) can be formed between the two eighth bosses (602) in each group, and the third through groove (604) ) is penetrated by the first body (101) of the first bracket (1); the eighth boss (602) is provided with a tenth rectangular through hole (605), and the eleventh boss (802) of the seventh bracket (8) is penetrated by the tenth through hole (605); the upper end surface of the ninth boss (603) is symmetrically provided with two third cylindrical grooves (606), and the rolling bearing (9) is penetrated by the third groove (606); the axial position of the third groove (606) is provided with an eleventh cylindrical through hole (607), and the first bearing section (202) of the second bracket (2) is penetrated by the eleventh through hole (607); The seventh bracket (8) is composed of an eighth body (801) and an eleventh boss (802) connected together. The eighth body (801) and the eleventh boss (802) are both rectangular parallelepiped symmetrical structures. The eleventh boss (802) is located on the lower end surface of the eighth body (801).

2. The device for spraying water on the outer surface of a rectangular steel pipe based on rotation according to claim 1 is characterized in that: The screw (7) is composed of a coaxial seventh body (701) and a tenth boss (702), the seventh body (701) and the tenth boss (702) are both cylindrical symmetrical structures, and the tenth boss (702) is located on the right end surface of the seventh body (701); the end of the tenth boss (702) is provided with a thread for screwing into the first screw hole (109) of the first bracket (1) or the second screw hole (406) of the fourth bracket (4).

3. The device for spraying water on the outer surface of a rectangular steel pipe based on rotation according to claim 1 or 2, characterized in that: The rolling bearing (9), the wheel (10) and the hinge (11) are all standard parts.

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