Surface passivation equipment and process for galvanized pipe production

Abstract

The invention discloses a surface passivation device for galvanized pipe production, comprising: a passivation unit comprising a passivation box arranged on a base and a support plate located on one side of the passivation box; the longitudinal displacement unit comprises a fixing lug fixedly installed at the end, away from the supporting plate, of the lower side wall of the top plate and a first motor fixedly installed on the fixing lug; the in-pipe liquid feeding unit comprises a lifting frame located under the threaded sleeve and two side plates fixedly installed at the two ends of the lower side of the lifting frame, and a plurality of evenly-distributed liquid feeding holes are formed in one side plate in a penetrating mode; the surface passivation technology for galvanized pipe production comprises the following steps that S1, galvanized pipes to be passivated are sequentially erected under a hoisting plate, and then the multiple galvanized pipes are moved to the position over a passivation box; the consumption of various ions in the galvanized pipe can be supplemented in time, and then the time needed by passivating treatment of the galvanized pipe is greatly shortened.

Description

Technical Field

[0001] The invention relates to the technical field of galvanized pipe production, and in particular to a surface passivation device and process for galvanized pipe production. Background Art

[0002] Galvanized pipe refers to a steel pipe with a layer of zinc on the surface. It is mainly used to prevent corrosion and rust of the steel pipe and extend its service life. Galvanized pipe is often used in construction, water supply, gas, heating, petroleum and other industries. Galvanized pipe passivation is a treatment process used to enhance the corrosion resistance of the galvanized pipe surface. The passivation treatment forms a dense passivation film on the surface of the galvanized pipe, which further improves the corrosion resistance of the zinc coating and extends the service life of the galvanized pipe. In the process of passivation production of galvanized pipe, corresponding passivation equipment needs to be used.

[0003] In the prior art, during the passivation treatment of the galvanized pipe surface, a plurality of galvanized pipes are usually hoisted and hung on a hoisting rack, and then the hoisted pipes are uniformly immersed in a passivation tank containing a passivation solution. The passivation solution mainly contains trivalent chromium ions, zinc ions, and phosphate ions, which are continuously consumed and form a protective layer on the inner and outer surfaces of the galvanized pipe. Since the fluidity and volume of the passivation solution entering the galvanized pipe are limited, the replenishment speed is relatively slow as the various ions in the passivation solution in the galvanized pipe are continuously consumed, which prolongs the time required for the passivation treatment of the galvanized pipe. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned existing surface passivation equipment and process for producing galvanized pipes, the present invention is proposed.

[0006] Therefore, the object of the present invention is to provide a surface passivation device and process for galvanized pipe production, which is suitable for solving the problem that as various ions in the passivation solution in the galvanized pipe are continuously consumed and the replenishment speed is relatively slow, the time required for the passivation treatment of the galvanized pipe is prolonged.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a surface passivation device for galvanized pipe production, comprising:

[0008] The passivation unit comprises a passivation box arranged on a base and a support plate located on one side of the passivation box, a top plate is fixedly connected to the top of the support plate, and a plurality of galvanized pipes are arranged under the top plate;

[0009] The longitudinal displacement unit comprises a fixing ear fixedly mounted on the lower side wall of the top plate away from the support plate and a first motor fixedly mounted on the fixing ear, wherein the output shaft of the first motor is threadedly connected to a threaded rod, and the threaded rod is threadedly connected to a threaded sleeve connected to the top plate in a longitudinal sliding manner;

[0010] The in-pipe liquid delivery unit comprises a hanging frame located directly below the threaded sleeve and two side panels fixedly mounted at both ends of the lower side of the hanging frame, wherein one of the side panels is provided with a plurality of evenly distributed liquid delivery holes, and the other side panel is provided with a plurality of drainage holes, an electric telescopic tube corresponding to the liquid delivery hole is fixedly mounted on the side panel, and a support sleeve connected to the liquid delivery hole is fixedly mounted on the other side panel, and both ends of each galvanized pipe are respectively inserted into the support sleeve and the electric telescopic tube, a support frame is fixedly mounted in the liquid delivery hole, and the support frame is close to the electric telescopic tube A spiral conveying blade is rotatably installed on one side, and the spiral conveying blade passes through the support frame outward and is fixedly connected to a rotating rod, each of the rotating rods is fixedly sleeved with a transmission sprocket, and multiple transmission sprockets are connected by transmission chains, one of the rotating rods is fixedly sleeved with a transmission roller, a supporting ear is fixedly installed on the side plate, a third motor is fixedly installed on the supporting ear, and the output shaft of the third motor is also fixedly sleeved with a transmission roller, and the two transmission rollers are connected by transmission belts, and the in-tube liquid delivery unit also includes a liquid delivery control component for controlling the liquid delivery of the liquid delivery hole.

[0011] As a preferred scheme of the surface passivation equipment for galvanized pipe production described in the present invention, the liquid delivery control component includes a connecting block fixedly installed at the lower end of the threaded sleeve, the lower end of the connecting block is provided with a telescopic groove opening downward, a connecting column is vertically slidably connected in the telescopic groove, the top of the connecting column is fixedly connected to a connecting plate, a limiting ring is fixedly connected to the opening at the lower end of the telescopic groove, and the upper side wall of the limiting ring and the upper inner wall of the telescopic groove are fixedly connected with guide columns in symmetrical positions, the guide columns are arranged through the connecting plate, a reset spring is sleeved on the guide column, and the two ends of the reset spring are respectively fixedly connected to the upper side wall of the connecting plate and the upper inner wall of the telescopic groove, and a liquid delivery start switch is fixedly connected at the center of the upper side wall of the telescopic groove, and a symmetrical liquid delivery stop switch is fixedly installed on the lower inner wall of the limiting ring, and the liquid delivery start switch and the liquid delivery stop switch are both electrically connected to the third motor.

[0012] As a preferred embodiment of the surface passivation equipment for galvanized pipe production described in the present invention, the passivation equipment also includes a hoisting unit, which includes a hoisting top plate and a hoisting bottom plate, the hoisting top plate and the hoisting bottom plate are fixedly connected by multiple groups of evenly distributed vertical rods, and second motors with symmetrical positions are fixedly installed at both ends of the upper side wall of the hoisting bottom plate, each of the second motor output shafts is fixedly connected to a winding roller, and a hoisting chain is wound around the winding roller, the lower ends of the two hoisting chains are fixedly connected to the hoisting frame, and the hoisting top plate is fixedly connected to the lower end of the connecting column.

[0013] As a preferred embodiment of the surface passivation equipment for galvanized pipe production described in the present invention, the passivation equipment also includes an automatic liquid replenishing unit, which includes a mother liquid tank and a configuration liquid tank respectively fixedly arranged on both sides of the passivation tank, the mother liquid tank and the configuration liquid tank are connected through an infusion pipe, and electric speed regulating valves are fixedly installed at both ends of the infusion pipe, a liquid replenishing pipe is fixedly connected at the center of the lower end of the infusion pipe, and the automatic liquid replenishing unit also includes a liquid replenishing control component for controlling the opening of the electric speed regulating valve.

[0014] As a preferred solution of the surface passivation equipment for galvanized pipe production described in the present invention, the liquid replenishment control component includes a hollow rod fixedly installed on the lower inner wall of the passivation box and a floating ring vertically slidably sleeved on the hollow rod, two symmetrical guide rods are vertically arranged in the hollow rod, and a lifting block is vertically slidably sleeved on the two guide rods, the upper side wall of the lifting block is fixedly connected to the floating ring by two connecting ropes, and the connecting rope passes through the upper end of the side wall of the hollow rod, a liquid replenishment start switch is fixedly installed on the inner wall of the upper end of the hollow rod, and a liquid replenishment stop switch is fixedly installed on the inner wall of the lower end of the hollow rod, and the liquid replenishment start switch and the liquid replenishment stop switch are both electrically connected to the electric speed control valve.

[0015] As a preferred solution of the surface passivation equipment for galvanized pipe production described in the present invention, the center of the infusion tube is fixedly connected to a mixing hood, impellers are symmetrically arranged inside the mixing hood, and a driving source for driving the two impellers to engage and rotate is fixedly arranged on the outer wall of the mixing hood, and the infusion tube is fixedly connected to the center of the lower end of the mixing hood.

[0016] As a preferred solution of the surface passivation equipment for galvanized pipe production described in the present invention, wherein: the fixed ear and the side wall of the support plate are fixedly connected with symmetrically positioned pressure dividing rods, each of the pressure dividing rods is slidably sleeved with a pressure dividing sleeve, and each of the pressure dividing sleeves is fixedly connected to the threaded sleeve through a pressure dividing column.

[0017] As a preferred solution of the surface passivation equipment for galvanized pipe production described in the present invention, wherein: a symmetrically positioned protective block is fixedly installed on the upper side wall of the limiting ring, and the protective block is arranged in a U shape.

[0018] As a preferred solution of the surface passivation equipment for galvanized pipe production described in the present invention, wherein: the inner walls on both sides of the passivation box are fixedly installed with symmetrically positioned pH detectors, the lower side wall of the mother liquid box and the outer side wall of the passivation box are fixedly connected with reinforcement blocks, and the lower side wall of the configuration liquid box and the outer side wall of the passivation box are also fixedly connected with reinforcement blocks.

[0019] A surface passivation process for galvanized pipe production, the passivation process is applicable to any of the above passivation equipment, and the passivation process comprises the following steps:

[0020] S1: Place the passivated galvanized pipes in sequence directly below the hoisting plate, and then move the galvanized pipes directly above the passivation box;

[0021] S2: Release the lifting chain through the second motor and put the galvanized pipe into the passivation box for passivation;

[0022] S3: After the passivation is completed, the passivated galvanized pipe is hoisted out of the passivation box, and the passivation treatment of the galvanized pipe is completed.

[0023] The beneficial effects of the present invention are as follows: after the galvanized pipes to be passivated are mounted on the hoisting frame, the galvanized pipes are driven to move to the top of the passivation box, so that the side plates and multiple galvanized pipes are immersed in the passivation liquid. At this time, the side plates and multiple galvanized pipes are subjected to the upward buoyancy of the passivation liquid, and the downward pulling force of the connecting column by the components below the connecting column is weakened accordingly. The originally stretched reset spring drives the connecting plate to have a slight upward displacement. At this time, the connecting plate squeezes the liquid delivery start switch, and the third motor is started accordingly. The multiple rotating rods drive the multiple spiral conveying blades to rotate, so that the passivation liquid can be continuously replenished into the interior of the galvanized pipe, and the consumption of various ions inside the galvanized pipe is replenished in time, thereby greatly shortening the time required for the passivation treatment of the galvanized pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0025] Figure 1 This is a schematic diagram of the overall structure of a surface passivation device for galvanized pipe production proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a longitudinal displacement unit of a surface passivation device for galvanized pipe production proposed by the present invention;

[0027] Figure 3This is a schematic diagram of the structure of the in-pipe liquid delivery unit of a surface passivation device for galvanized pipe production proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a liquid delivery control component of a surface passivation device for galvanized pipe production proposed by the present invention;

[0029] Figure 5 A schematic diagram of the internal structure of a mixing hood of a surface passivation device for galvanized pipe production proposed by the present invention;

[0030] Figure 6 This is a schematic diagram of the coordination structure of a mixing hood and a driving source of a surface passivation device for galvanized pipe production proposed by the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of a liquid replenishment control component of a surface passivation device for galvanized pipe production proposed by the present invention;

[0032] Figure 8 The present invention is a schematic diagram of the steps of a surface passivation process for producing galvanized pipes.

[0033] Description of the drawings: 100 passivation unit, 101 base, 102 passivation box, 103 support plate, 104 top plate, 105 galvanized pipe, 106 PH detector, 200 longitudinal displacement unit, 201 first motor, 202 threaded rod, 203 threaded sleeve, 204 pressure rod, 205 pressure sleeve, 300 lifting unit, 301 lifting top plate, 302 lifting bottom plate, 303 second motor, 304 winding roller, 305 lifting chain, 400 in-tube liquid delivery unit, 401 lifting frame, 402 side plate, 403 liquid delivery hole, 404 support sleeve, 405 electric telescopic pipe, 406 support frame, 407 spiral conveying blade, 408 rotating rod, 409 transmission sprocket, 410 transmission chain, 411 third motor, 412 transmission Roller, 413 transmission belt, 414 liquid delivery control assembly, 414a connecting block, 414b connecting column, 414c connecting plate, 414d limiting ring, 414e guide column, 414f liquid delivery start switch, 414g liquid delivery stop switch, 414h protection block, 414i return spring, 500 automatic liquid replenishment unit, 501 mother liquid tank, 502 configuration liquid tank, 503 infusion tube, 504 electric speed regulating valve, 505 mixing cover, 506 impeller, 507 driving source, 508 liquid replenishment tube, 509 reinforcement block, 510 liquid replenishment control assembly, 510a hollow rod, 510b lifting block, 510c guide rod, 510d liquid replenishment stop switch, 510e liquid replenishment start switch, 510f floating ring, 510g connecting rope. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Example 1

[0039] Reference Figure 1-Figure 8 , which is an embodiment of the present invention, provides a surface passivation device for galvanized pipe production, including: a passivation unit 100, a longitudinal displacement unit 200, a hoisting unit 300, an in-pipe liquid feeding unit 400 and an automatic liquid replenishing unit 500.

[0040] The passivation unit 100 includes a passivation box 102 disposed on a base 101 and a support plate 103 located on one side of the passivation box 102. A top plate 104 is fixedly connected to the top of the support plate 103. A plurality of galvanized pipes 105 are arranged below the top plate 104.

[0041] Secondly, the longitudinal displacement unit 200 includes a fixing ear fixedly mounted on the lower side wall of the top plate 104 away from one end of the support plate 103 and a first motor 201 fixedly mounted on the fixing ear, the output shaft of the first motor 201 is threadedly connected with a threaded rod 202, the threaded rod 202 is threadedly connected with a threaded sleeve 203 longitudinally slidably connected to the top plate 104, the fixing ear and the side wall of the support plate 103 are fixedly connected with symmetrically positioned pressure dividing rods 204, each pressure dividing rod 204 is slidably sleeved with a pressure dividing sleeve 205, each pressure dividing sleeve 205 is fixedly connected to the threaded sleeve 203 through a pressure dividing column, and the downward pulling force on the threaded rod 202 can be shared by the coordinated use of the pressure dividing rod 204, the pressure dividing sleeve 205 and the pressure dividing column, which effectively solves the defect that the threaded rod 202 is deformed due to the excessive downward pulling force of the threaded sleeve 203 on the threaded rod 202;

[0042] Secondly, the hoisting unit 300 includes a hoisting top plate 301 and a hoisting bottom plate 302, and the hoisting top plate 301 and the hoisting bottom plate 302 are fixedly connected by multiple groups of evenly distributed vertical rods, and symmetrical second motors 303 are fixedly installed at both ends of the upper side wall of the hoisting bottom plate 302, and each second motor 303 output shaft is fixedly connected to a winding roller 304, and a hoisting chain 305 is wound around the winding roller 304, and the lower ends of the two hoisting chains 305 are fixedly connected to the hoisting frame 401, and the hoisting top plate 301 is fixedly connected to the lower end of the connecting column 414b.

[0043] Furthermore, the in-pipe liquid delivery unit 400 includes a hanging frame 401 located directly below the threaded sleeve 203 and two side panels 402 fixedly installed at both ends of the lower side of the hanging frame 401, wherein one of the side panels 402 is penetrated with a plurality of evenly distributed liquid delivery holes 403, and the other side panel 402 is penetrated with a plurality of drainage holes, an electric telescopic tube 405 corresponding to the liquid delivery hole 403 is fixedly installed on the side panel 402, and a support sleeve 404 connected to the liquid delivery hole 403 is fixedly installed on the other side panel 402, and both ends of each galvanized pipe 105 are respectively inserted into the support sleeve 404 and the electric telescopic tube 405, a support frame 406 is fixedly installed in the liquid delivery hole 403, and a threaded sleeve 406 is rotatably installed on one side of the support frame 406 close to the electric telescopic tube 405 The spiral conveying blade 407 is externally penetrated through the support frame 406 and is fixedly connected to a rotating rod 408. A transmission sprocket 409 is fixedly sleeved on each rotating rod 408. Multiple transmission sprockets 409 are transmission-connected through a transmission chain 410. A transmission roller 412 is fixedly sleeved on one of the rotating rods 408. A supporting ear is fixedly installed on the side plate 402, and a third motor 411 is fixedly installed on the supporting ear. In the present invention, a waterproof cover is sleeved on the outer side of the third motor 411, which can be directly immersed in the passivation liquid. The output shaft of the third motor 411 is also fixedly sleeved with a transmission roller 412. The two transmission rollers 412 are transmission-connected through a transmission belt 413. The in-tube liquid delivery unit 400 also includes a liquid delivery control component 414 for controlling the liquid delivery of the liquid delivery hole 403.

[0044] Furthermore, the liquid delivery control assembly 414 includes a connecting block 414a fixedly mounted at the lower end of the threaded sleeve 203, a telescopic groove opening downward is provided at the lower end of the connecting block 414a, a connecting column 414b is vertically slidably connected in the telescopic groove, a connecting plate 414c is fixedly connected to the top of the connecting column 414b, a limiting ring 414d is fixedly connected to the opening at the lower end of the telescopic groove, and a guide column 414e is fixedly connected to the upper side wall of the limiting ring 414d and the upper inner wall of the telescopic groove with a position symmetrical. The guide column 414e is fixedly connected to the upper inner wall of the telescopic groove. 4e is arranged through the connecting plate 414c, a return spring 414i is sleeved on the guide column 414e, and two ends of the return spring 414i are respectively fixedly connected to the upper side wall of the connecting plate 414c and the upper inner wall of the telescopic groove, and a liquid delivery start switch 414f is fixedly connected to the center of the upper side wall of the telescopic groove, and a symmetrical liquid delivery stop switch 414g is fixedly installed on the lower inner wall of the limit ring 414d, and the liquid delivery start switch 414f and the liquid delivery stop switch 414g are both electrically connected to the third motor 411.

[0045] Furthermore, the automatic liquid replenishing unit 500 includes a mother liquid tank 501 and a configuration liquid tank 502 respectively fixedly arranged on both sides of the passivation box 102. The inner walls of both sides of the passivation box 102 are fixedly installed with symmetrically positioned pH detectors 106. The pH detector 106 is an instrument for measuring the pH value of a solution. It is widely used in the fields of galvanized pipe passivation treatment, chemistry, environmental monitoring, etc. The basic working principle of the pH detector 106 is to determine the pH value of the solution by measuring the concentration of hydrogen ions H+ in the solution. In the present invention, the pH detector 106 is used to detect the pH value of the passivation solution in the passivation box 101. The pH detector model used in the present invention is Hanna Instruments HI98107, the lower side wall of the mother liquid tank 501 and the outer side wall of the passivation tank 102 are fixedly connected with a reinforcing block 509, and the lower side wall of the configuration liquid tank 502 and the outer side wall of the passivation tank 102 are also fixedly connected with a reinforcing block 509. The setting of the reinforcing block 509 improves the connection strength between the mother liquid tank 501 and the passivation tank 101, and between the configuration liquid tank 502 and the side wall of the passivation tank 101. The mother liquid for configuring the passivation liquid is stored in the mother liquid tank 501. The configuration liquid tank 502 is used to neutralize the pH value of the mother liquid to ensure that the supplemented liquid and the remaining liquid in the passivation tank 101 can be mixed to reach the pH range required for the passivation treatment of the galvanized pipe 105, thereby ensuring the consistency of the passivation treatment of the galvanized pipe 105. The mother liquid tank 501 and the configuration liquid tank 502 are connected through the infusion tube 503 , and electric speed regulating valves 504 are fixedly installed at both ends of the infusion tube 503. The electric speed regulating valve 504 is an automatic control device for controlling parameters such as fluid flow, pressure, and temperature. It is composed of an electric actuator and a valve body. The opening of the valve core is adjusted by the drive of the electric actuator to control the flow of the fluid. In the present invention, it ensures that the infusion tube 503 is opened or closed, and can adjust the liquid outlet rate of the mother liquid tank 501 and the configuration liquid tank 502 according to the ratio demand response. The electric speed regulating valve 504 used in the present invention is model VVF42.100. The center of the lower end of the infusion tube 503 is fixedly connected with a liquid replenishment tube 508, and the automatic liquid replenishment unit 500 also includes a liquid replenishment control component 510 for controlling the opening of the electric speed regulating valve 504.

[0046] Furthermore, the liquid replenishment control assembly 510 includes a hollow rod 510a fixedly mounted on the inner wall of the lower side of the passivation box 102 and a floating ring 510f vertically slidably sleeved on the hollow rod 510a. Two symmetrical guide rods 510c are vertically arranged in the hollow rod 510a. A lifting block 510b is vertically slidably sleeved on the two guide rods 510c. The friction between the lifting block 510b and the guide rod 510c and the friction between the connecting rope 510g and the side wall of the hollow rod 510a are The gravity of the connecting rope 510g can be ignored. The upper side wall of the lifting block 510b is fixedly connected to the floating ring 510f through two connecting ropes 510g, and the connecting rope 510g is arranged through the upper end of the side wall of the hollow rod 510a. A liquid replenishment start switch 510e is fixedly installed on the inner wall of the upper end of the hollow rod 510a, and a liquid replenishment stop switch 510d is fixedly installed on the inner wall of the lower end of the hollow rod 510a. The liquid replenishment start switch 510e and the liquid replenishment stop switch 510d are both electrically connected to the electric speed regulating valve 504.

[0047] In the initial state, the float 510f floats on the upper surface of the passivation liquid. The gravity of the float 510f itself is equal to the sum of the buoyancy of the passivation liquid on the float 510f and the gravity of the lifting block 510b itself. As the passivation liquid in the passivation box 101 is continuously brought out of the passivation box 101 by the galvanized pipe 105 connected to the hanging frame 401, the passivation liquid in the passivation box 101 is continuously reduced, and the depth of the passivation liquid immersing the float 510f is reduced. The buoyancy of the passivation liquid on the float 510f is reduced accordingly. The float 510f is subjected to its own gravity and moves downward along the hollow rod 510a until the passivation liquid re-immerses the float 510f to a specified depth, thereby achieving the float 510f being immersed in the passivation liquid in the passivation box 101. For the purpose of liquid level change, when the passivation liquid in the passivation box 101 drops to a certain depth, the float 510f drives the lifting block 510b through the connecting rope 510g to squeeze the liquid replenishment start switch 510e upward, and the liquid replenishment start switch 510e controls the electric speed regulating valve 504 to open. After the mother liquid and the configuration liquid are pre-mixed in the mixing cover 505, they are replenished into the passivation box 101 through the liquid replenishment pipe 508, so as to realize automatic liquid replenishment of the passivation liquid in the passivation box 101. With the replenishment of the passivation liquid, the buoyancy of the passivation liquid on the float 510f increases. At this time, the lifting block 510b moves downward. When the lifting block 510b squeezes the liquid replenishment stop switch 510d, the electric speed regulating valve 504 is closed accordingly.

[0048] Finally, a mixing hood 505 is fixedly connected at the center of the infusion tube 503, and impellers 506 are symmetrically arranged inside the mixing hood 505. A driving source 507 for driving the two impellers 506 to mesh and rotate is fixedly arranged on the outer wall of the mixing hood 505, and the infusion tube 508 is fixedly connected to the center of the lower end of the mixing hood 505; through the coordinated use of the mixing hood 505, the impeller 506 and the driving source 507, the passivation liquid mother liquor and the configuration liquid can be pre-mixed during the infusion process, and the guidance of the impeller 506 and the impact force of the liquid flow are utilized to accelerate the mixing, thereby shortening the configuration time. The driving source includes a driving motor and two meshing gears, which belongs to a very mature prior art, so its specific structure is not introduced in detail in the present invention.

[0049] A surface passivation process for galvanized pipe production, the passivation process is applicable to any of the above passivation equipment, and the passivation process includes the following steps:

[0050] S1: The galvanized pipes 105 with passivation are sequentially erected directly below the hoisting plate, and then the plurality of galvanized pipes 105 are moved directly above the passivation box 102;

[0051] S2: loosen the hoisting chain 305 through the second motor 303, and put the galvanized pipe 105 into the passivation box 102 for passivation;

[0052] S3: After the passivation is completed, the passivated galvanized pipe 105 is hoisted out of the passivation box 102, and the passivation treatment of the galvanized pipe 105 is completed.

[0053] Example 2

[0054] refer to Figure 4 , which is different from Example 1, in that: a symmetrically positioned protective block 414h is fixedly installed on the upper side wall of the limiting ring 414d, and the protective block 414h is arranged in a U shape; through the arrangement of the limiting ring 414h, the defect that the connecting plate 414c is pressed down too deeply during the lifting process, which easily squeezes the liquid delivery shut-off switch 414g and causes damage to it, is effectively solved.

[0055] During use, after the galvanized pipes 105 that need to be passivated are set up one by one under the hanging frame 401, the first motor 201 is controlled to drive the galvanized pipes 105 to move to the top of the passivation box 101, and the hanging chain 305 is controlled to be lowered, so that the side plate 402 and the plurality of galvanized pipes 105 are immersed in the passivation liquid. At this time, the side plate 402 and the plurality of galvanized pipes 105 are subjected to the upward buoyancy of the passivation liquid, and the downward pulling force of the components under the connecting column 414b on the connecting column 414b is weakened accordingly. The originally stretched return spring 414i then drives the connecting plate 414c to have a slight upward displacement. At this time, the connecting plate 414c squeezes the liquid delivery start switch 414f, and the third motor 411 starts accordingly. The multiple rotating rods 408 drive the multiple spiral conveying blades 407 to rotate, which can continuously replenish the passivation liquid into the galvanized pipe 105, and timely replenish the consumption of various ions in the galvanized pipe 105, thereby greatly shortening the time required for the passivation treatment of the galvanized pipe 105.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A surface passivation equipment for galvanized pipe production, characterized in that: include: A passivation unit (100) comprises a passivation box (102) arranged on a base (101) and a support plate (103) located on one side of the passivation box (102), wherein a top plate (104) is fixedly connected to the top of the support plate (103), and a plurality of galvanized pipes (105) are arranged below the top plate (104); A longitudinal displacement unit (200) comprises a fixing ear fixedly mounted on an end of a lower side wall of a top plate (104) away from a support plate (103) and a first motor (201) fixedly mounted on the fixing ear, wherein an output shaft of the first motor (201) is threadedly connected to a threaded rod (202), and a threaded sleeve (203) is threadedly connected to the threaded rod (202) and is longitudinally slidably connected to the top plate (104); The in-pipe liquid delivery unit (400) comprises a hanging frame (401) located directly below the threaded sleeve (203) and two side panels (402) fixedly mounted at both ends of the lower side of the hanging frame (401), wherein one of the side panels (402) is provided with a plurality of evenly distributed liquid delivery holes (403), and the other side panel (402) is provided with a plurality of drainage holes, an electric telescopic tube (405) corresponding to the liquid delivery hole (403) is fixedly mounted on the side panel (402), and a support sleeve (404) connected to the liquid delivery hole (403) is fixedly mounted on the other side panel (402), and both ends of each galvanized pipe (105) are respectively inserted into the support sleeve (404) and the electric telescopic tube (405), and a support frame (406) is fixedly mounted in the liquid delivery hole (403), and the support frame (406) is close to the electric telescopic tube. A spiral conveying blade (407) is rotatably mounted on one side of the (405), and the spiral conveying blade (407) penetrates the support frame (406) outwardly and is fixedly connected to a rotating rod (408), and each of the rotating rods (408) is fixedly sleeved with a transmission sprocket (409), and multiple transmission sprockets (409) are transmission-connected via a transmission chain (410), and a transmission roller (412) is fixedly sleeved on one of the rotating rods (408), and a supporting ear is fixedly mounted on the side plate (402), and a third motor (411) is fixedly mounted on the supporting ear, and the output shaft of the third motor (411) is also fixedly sleeved with a transmission roller (412), and the two transmission rollers (412) are transmission-connected via a transmission belt (413), and the in-tube liquid delivery unit (400) further includes a liquid delivery control component (414) for controlling the liquid delivery of the liquid delivery hole (403).

2. A surface passivation equipment for galvanized pipe production according to claim 1, characterized in that: The liquid delivery control assembly (414) comprises a connecting block (414a) fixedly mounted on the lower end of the threaded sleeve (203); a telescopic groove opening downward is provided at the lower end of the connecting block (414a); a connecting column (414b) is vertically slidably connected in the telescopic groove; a connecting plate (414c) is fixedly connected to the top of the connecting column (414b); a limiting ring (414d) is fixedly connected to the opening at the lower end of the telescopic groove; and a guide column (414e) symmetrically positioned is fixedly connected to the upper side wall of the limiting ring (414d) and the upper inner wall of the telescopic groove; the guide column (414 e) is arranged through the connecting plate (414c), a return spring (414i) is sleeved on the guide column (414e), and the two ends of the return spring (414i) are respectively fixedly connected to the upper side wall of the connecting plate (414c) and the upper inner wall of the telescopic groove, and a liquid delivery start switch (414f) is fixedly connected to the center of the upper side wall of the telescopic groove, and a symmetrical liquid delivery stop switch (414g) is fixedly installed on the lower inner wall of the limit ring (414d), and the liquid delivery start switch (414f) and the liquid delivery stop switch (414g) are both electrically connected to the third motor (411).

3. A surface passivation equipment for galvanized pipe production according to claim 2, characterized in that: The passivation device also includes a hoisting unit (300), which includes a hoisting top plate (301) and a hoisting bottom plate (302), wherein the hoisting top plate (301) and the hoisting bottom plate (302) are fixedly connected via a plurality of groups of evenly distributed vertical rods, and symmetrically positioned second motors (303) are fixedly installed at both ends of the upper side wall of the hoisting bottom plate (302), and each output shaft of the second motor (303) is fixedly connected to a winding roller (304), and a hoisting chain (305) is wound around the winding roller (304), and the lower ends of the two hoisting chains (305) are fixedly connected to the hoisting frame (401), and the hoisting top plate (301) is fixedly connected to the lower end of the connecting column (414b).

4. The surface passivation equipment for galvanized pipe production according to claim 1, characterized in that: The passivation device further comprises an automatic liquid replenishment unit (500), which comprises a mother liquid tank (501) and a configuration liquid tank (502) respectively fixedly arranged on both sides of the passivation tank (102); the mother liquid tank (501) and the configuration liquid tank (502) are connected via a liquid infusion tube (503), and electric speed regulating valves (504) are fixedly installed at both ends of the liquid infusion tube (503); a liquid replenishment tube (508) is fixedly connected at the center of the lower end of the liquid infusion tube (503), and the automatic liquid replenishment unit (500) further comprises a liquid replenishment control component (510) for controlling the opening of the electric speed regulating valve (504).

5. A surface passivation device for galvanized pipe production according to claim 4, characterized in that: The liquid replenishment control assembly (510) comprises a hollow rod (510a) fixedly mounted on the lower inner wall of the passivation box (102) and a floating ring (510f) vertically slidably sleeved on the hollow rod (510a), two symmetrical guide rods (510c) are vertically arranged in the hollow rod (510a), and a lifting block (510b) is vertically slidably sleeved on the two guide rods (510c), and the upper side wall of the lifting block (510b) and the floating ring (510f) are connected to each other. 0f) are fixedly connected by two connecting ropes (510g), and the connecting rope (510g) passes through the upper end of the side wall of the hollow rod (510a), and a liquid replenishment start switch (510e) is fixedly installed on the inner wall of the upper end of the hollow rod (510a), and a liquid replenishment stop switch (510d) is fixedly installed on the inner wall of the lower end of the hollow rod (510a), and the liquid replenishment start switch (510e) and the liquid replenishment stop switch (510d) are both electrically connected to the electric speed control valve (504).

6. The surface passivation equipment for galvanized pipe production according to claim 4, characterized in that: The center of the infusion tube (503) is fixedly connected to a mixing hood (505), and impellers (506) are symmetrically arranged inside the mixing hood (505). A driving source (507) for driving the two impellers (506) to engage and rotate is fixedly arranged on the outer wall of the mixing hood (505), and the infusion tube (508) is fixedly connected to the center of the lower end of the mixing hood (505).

7. The surface passivation equipment for galvanized pipe production according to claim 1, characterized in that: The fixing ears and the side wall of the support plate (103) are fixedly connected with symmetrically positioned pressure dividing rods (204), each of the pressure dividing rods (204) is slidably sleeved with a pressure dividing sleeve (205), and each of the pressure dividing sleeves (205) is fixedly connected to the threaded sleeve (203) via a pressure dividing column.

8. The surface passivation equipment for galvanized pipe production according to claim 2, characterized in that: A protective block (414h) symmetrically positioned is fixedly mounted on the upper side wall of the limiting ring (414d), and the protective block (414h) is arranged in a U shape.

9. A surface passivation equipment for galvanized pipe production according to claim 4, characterized in that: The inner walls on both sides of the passivation box (102) are fixedly installed with symmetrically positioned pH detectors (106); the lower side wall of the mother liquid box (501) and the outer side wall of the passivation box (102) are fixedly connected with a reinforcing block (509); the lower side wall of the configuration liquid box (502) and the outer side wall of the passivation box (102) are also fixedly connected with a reinforcing block (509).

10. A surface passivation process for galvanized pipe production, the passivation process is applicable to any one of the passivation equipments in claims 1-9 above, characterized in that: The passivation process comprises the following steps: S1: The galvanized pipes (105) with passivation are sequentially erected directly below the hanging plate, and then the plurality of galvanized pipes (105) are moved directly above the passivation box (102); S2: loosening the hoisting chain (305) through the second motor (303) and placing the galvanized pipe (105) into the passivation box (102) for passivation; S3: After the passivation is completed, the passivated galvanized pipe (105) is hoisted out of the passivation box (102), and the passivation treatment of the galvanized pipe (105) is completed.

Images