CN113617576B - Equipment and process for forming centrifugal nodular cast iron pipe plastic inner coating by adopting spraying method - Google Patents
Equipment and process for forming centrifugal nodular cast iron pipe plastic inner coating by adopting spraying method Download PDFInfo
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- CN113617576B CN113617576B CN202110913329.7A CN202110913329A CN113617576B CN 113617576 B CN113617576 B CN 113617576B CN 202110913329 A CN202110913329 A CN 202110913329A CN 113617576 B CN113617576 B CN 113617576B
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- iron pipe
- cast iron
- feeding pipeline
- spray head
- cold air
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0654—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and a treating nozzles being translated through the hollow bodies in a direction essentially parallel to the rotational axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Spray Control Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to the technical field of nodular cast iron pipe production equipment, and provides equipment for forming a centrifugal nodular cast iron pipe plastic inner coating by adopting a spraying method, which comprises a bearing mechanism for bearing and driving a cast iron pipe to rotate, and is characterized in that: the equipment further comprises a heating room, a moving mechanism, a feeding pipeline arranged above the moving mechanism, a gas control valve connected with the inlet end of the feeding pipeline, and a spray head connected with the outlet end of the feeding pipeline, wherein a feed inlet is formed in the side wall of the feeding pipeline between the spray head and the gas control valve, the bearing mechanism is positioned in the heating room, and the spray head has the moving freedom degree of the cast iron pipe which enters and exits on the bearing mechanism by virtue of the moving mechanism. The problems that an inner coating prepared by a rotational molding method in the related technology is easy to fall off and the inner coating prepared by a negative pressure adsorption method and a cast iron pipe can not be completely sealed are solved.
Description
Technical Field
The invention relates to the technical field of nodular cast iron pipe production equipment, in particular to equipment and a process for forming a centrifugal nodular cast iron pipe plastic inner coating by adopting a spraying method.
Background
The nodular cast iron pipe is commonly used with six and seven coatings, the technology refers to nontoxic PE and PVC particles, one of the prior art is a rotational molding method, namely, a pipeline rolls, fluid is heated while flowing, and after heat absorption, cross-linking reaction occurs and mutual adhesion is formed to form an inner coating, the coating can only be used on the steel pipe, because the wall thickness of the steel pipe is uniform, the temperature difference is small, the adhesive force is uniform and firm, the inner wall of the nodular cast iron pipe is not smooth and clean, and the coating is easy to fall off by using the method; the other method is a negative pressure adsorption method, wherein dry hot air is used for pressing the whole prefabricated plastic pipe, the prefabricated plastic pipe is attached to the inner wall of the nodular cast iron pipe by means of negative pressure, but an adhesive is required to be arranged between the prefabricated plastic pipe and the nodular cast iron pipe, the prefabricated plastic pipe cannot be completely sealed, and drinking water can contact the adhesive and is polluted.
Disclosure of Invention
The invention provides equipment and a process for forming a plastic inner coating of a centrifugal nodular cast iron pipe by adopting a spraying method, and solves the problems that the inner coating prepared by a rotational molding method in the related art is easy to fall off, and the inner coating prepared by a negative pressure adsorption method and the cast iron pipe cannot be totally closed.
The technical scheme of the invention is as follows: the equipment for forming the plastic inner coating of the centrifugal nodular cast iron pipe by adopting the spraying method comprises a bearing mechanism for bearing and driving the cast iron pipe to rotate, and is characterized in that: the equipment further comprises a heating room, a moving mechanism, a feeding pipeline arranged above the moving mechanism, a gas control valve connected with the inlet end of the feeding pipeline, and a spray head connected with the outlet end of the feeding pipeline, wherein a feed inlet is formed in the side wall of the feeding pipeline between the spray head and the gas control valve, the bearing mechanism is positioned in the heating room, and the spray head has the moving freedom degree of the cast iron pipe which enters and exits the bearing mechanism by means of the movement of the moving mechanism.
The equipment further comprises a bin arranged above the moving mechanism, the outlet of the bin is connected with the feed inlet of the feed pipeline, and a discharge valve is arranged at the outlet of the bin.
The equipment further comprises a cold air inlet pipe, a return air pipe and a circulator, wherein the cold air inlet pipe is arranged on the outer side of the feeding pipeline in a sleeved mode, the return air pipe is arranged on the outer side of the cold air inlet pipe in a sleeved mode, a cavity between the cold air inlet pipe and the feeding pipeline is a cold air cavity, the cavity between the cold air inlet pipe and the return air pipe is a return air cavity, one end, far away from the spray head, of the cold air cavity is connected with a cold air control valve, one end, far away from the spray head, of the return air cavity is connected with the return air valve, one ends, close to the spray head, of the cold air cavity and the return air cavity are communicated with the aid of a communicating cavity inside the circulator, the outlet end of the spray head is located on the outer side of the circulator, and the inlet end of the spray head penetrates through the circulator to be connected with the outlet end of the feeding pipeline.
The device also comprises a heat-insulating layer arranged on the outer side of the return air pipe.
The cleaning equipment also comprises a blocking wheel group arranged in the heating room, and the blocking wheel of the blocking wheel group is in contact with the end surface of the cast iron pipe arranged on the bearing mechanism to form a limiting structure.
The equipment also comprises a bottom plate, and the gear group and the bearing mechanism are arranged on the bottom plate.
The bearing mechanism comprises a driving mechanism and a riding wheel set used for bearing the cast iron pipe, and at least one riding wheel of the riding wheel set is connected with an output shaft of the driving mechanism.
The equipment also comprises a guide rail arranged outside the heating room, and the moving mechanism has moving freedom degree on the guide rail.
The equipment also comprises a lifting mechanism arranged between the feeding pipeline and the moving mechanism, and the feeding pipeline has a lifting degree of freedom by means of the stretching of the lifting mechanism.
The key point of the process for forming the plastic inner coating of the centrifugal nodular cast iron pipe by adopting the spraying method is as follows: the process comprises the following steps:
a. placing a cast iron pipe to be sprayed on a bearing mechanism in a heating room;
b. heating the cast iron pipe to a set temperature T by using a heating room;
c. the bearing mechanism is utilized to drive the cast iron pipe to rotate at a speed V1, the moving mechanism drives the feeding pipeline and the spray head to move at a speed V2, so that the spray head moves from one end to the other end in the cast iron pipe, high-pressure gas enters the feeding pipeline through the gas control valve, the material in the feeding pipeline is sprayed out to the inner wall of the cast iron pipe through the spray head, and the coating in the cast iron pipe is sprayed.
The working principle and the beneficial effects of the invention are as follows: the method comprises the steps of placing a cast iron pipe to be sprayed on a bearing mechanism in a heating room, heating the cast iron pipe to a set temperature by using the heating room, driving the cast iron pipe to rotate at a constant speed by using the bearing mechanism, driving a feeding pipeline and a spray head to move at a constant speed by using a moving mechanism, enabling the spray head to move from one end to the other end in the cast iron pipe, enabling high-pressure gas to enter the feeding pipeline through a gas control valve in the spraying moving process, enabling the material in the feeding pipeline to be sprayed onto the inner wall of the cast iron pipe through the spray head, and finishing spraying of an inner coating of the cast iron pipe. The high-pressure gas spraying method can realize full sealing, has no pollution to water, and the inner coating and the cast iron pipe are firmly and reliably bonded and are not easy to fall off.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a in fig. 1.
Fig. 3 is a schematic view showing the positional relationship between the nozzle head and the cast iron pipe according to the present invention.
In the figure: 1. the device comprises a bearing mechanism, 1-1 parts of a driving mechanism, 1-2 parts of a riding wheel set, 2 parts of a heating room, 3 parts of a moving mechanism, 4 parts of a feeding pipeline, 5 parts of a gas control valve, 6 parts of a spray head, 7 parts of a storage bin, 8 parts of a discharge valve, 9 parts of a cold air inlet pipe, 10 parts of a return air pipe, 11 parts of a circulator, 12 parts of a cold air control valve, 13 parts of a heat insulation layer, 14 parts of a blocking wheel set, 15 parts of a bottom plate, 16 parts of a guide rail, 17 parts of a lifting mechanism, 18 parts of a cast iron pipe, 19 parts of a limiting baffle plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall be included within the scope of protection of the present invention.
In the specific embodiment, as shown in fig. 1, the equipment for forming the plastic inner coating of the centrifugal ductile cast iron pipe by using the spraying method comprises a bearing mechanism 1 for bearing and driving a cast iron pipe 18 to rotate, a heating room 2, a moving mechanism 3, a feeding pipeline 4 arranged above the moving mechanism 3, wherein the feeding pipeline 4 is a hard pipe and cannot bend and deform in the moving process along with the moving mechanism 3, the equipment further comprises a gas control valve 5 connected with the inlet end of the feeding pipeline 4 and a spray head 6 connected with the outlet end of the feeding pipeline 4, a feeding hole is formed in the side wall of the feeding pipeline 4 between the spray head 6 and the gas control valve 5, the bearing mechanism 1 is positioned inside the heating room 2, and the spray head 6 has the moving freedom degree of entering and exiting the cast iron pipe 18 positioned on the bearing mechanism 1 by means of the movement of the moving mechanism 3.
As a further improvement of the invention, the equipment also comprises a bin 7 arranged above the moving mechanism 3, the outlet of the bin 7 is connected with the feeding hole of the feeding pipeline 4, and the outlet of the bin 7 is provided with a discharge valve 8. As shown in fig. 1, the magazine 7 moves together with the moving mechanism 3, which reduces the requirement on the length of the feeding duct 4.
As a further improvement of the invention, the equipment further comprises a cold air inlet pipe 9 sleeved outside the feeding pipeline 4, an air return pipe 10 sleeved outside the cold air inlet pipe 9, and a circulator 11, wherein a cavity between the cold air inlet pipe 9 and the feeding pipeline 4 is a cold air cavity, a cavity between the cold air inlet pipe 9 and the air return pipe 10 is an air return cavity, one end of the cold air cavity far away from the spray head 6 is connected with a cold air control valve 12, one end of the air return cavity far away from the spray head 6 is connected with the air return valve, the ends of the cold air cavity and the air return cavity near the spray head 6 are communicated by virtue of a communication cavity inside the circulator 11, the outlet end of the spray head 6 is positioned outside the circulator 11, and the inlet end of the spray head 6 penetrates through the circulator 11 to be connected with the outlet end of the feeding pipeline 4.
The material is easily adhered to the feeding pipeline 4 by heat, as shown in fig. 1 and fig. 2, a double-layer structure formed by a cold air inlet pipe 9 and an air return pipe 10 is added on the periphery of the feeding pipeline 4, during feeding, the refrigeration equipment conveys cold air to a cold air cavity between the cold air inlet pipe 9 and the feeding pipeline 4 through a cold air control valve 12, the material in the feeding pipeline 4 is cooled, heated hot air enters a return air cavity between the cold air inlet pipe 9 and the air return pipe 10 after passing through a communication cavity of a circulator 11, and returns to the refrigeration equipment through the air return valve, so that the material can be effectively prevented from being adhered to the feeding pipeline 4, after feeding is stopped at a feeding port on the side wall of the feeding pipeline 4, the high-pressure gas entering the feeding pipeline 4 through a gas control valve 5 can completely feed out the material in the feeding pipeline 4, and no particles are remained in the feeding pipeline 4 when spraying is not performed. For the convenience of installation, the cold air inlet pipe 9 and the return air pipe 10 are both positioned between the feed opening of the feed pipe 4 and the circulator 11.
As a further improvement of the present invention, the apparatus further includes an insulating layer 13 disposed outside the return duct 10, as shown in fig. 1 and 2, so as to reduce the influence of the outside air on the temperature inside the return duct 10.
As a further improvement of the invention, the cleaning device also comprises a catch wheel group 14 arranged in the heating room 2, and the catch wheels of the catch wheel group 14 are in contact with the end surface of the cast iron pipe 18 arranged on the bearing mechanism 1 to form a limiting structure.
When the rotation direction of the cast iron pipe 18 is fixed, the cast iron pipe 18 only deviates in one direction along the axial direction, so that only one end of the cast iron pipe 18 needs to be provided with the catch wheel group 14, as shown in fig. 1, the catch wheel group 14 is positioned at the rightmost side, and the catch wheel of the catch wheel group 14 is in contact with the right end face of the cast iron pipe 18, so that the cast iron pipe 18 can be prevented from moving towards the direction of the moving mechanism 1 in the rotation process, and the place where the inner coating is leaked and sprayed in the cast iron pipe 18 is avoided. The number of the baffle wheel sets 14 is two, the baffle wheel sets are symmetrically arranged along the axis of the cast iron pipe 18, each baffle wheel set 14 comprises a support and a baffle wheel which is in running fit with the support, the axis of each baffle wheel is vertically arranged, the circumferential surface of each baffle wheel is in contact with the cast iron pipe 18, the baffle wheels rotate along with the cast iron pipe 18 in the rotating process, rolling friction occurs between the baffle wheels and the cast iron pipe 18, and compared with sliding friction, the friction force between the baffle wheels and the cast iron pipe 18 can be reduced, and the abrasion speed of the cast iron pipe 18 is reduced. The outer diameter of the catch wheel is linearly reduced from top to bottom, so that the contact area between the catch wheel and the cast iron pipe 18 can be reduced on the premise of meeting the limiting effect, and the abrasion speed of the cast iron pipe 18 is further reduced.
As a further development of the invention, the device further comprises a base plate 15, the set of gear wheels 14 and the support means 1 being arranged on the base plate 15. As shown in fig. 1, the carrier 1 and the catch wheel set 14 are fixed together for easy movement.
As a further improvement of the invention, the bearing mechanism 1 comprises a driving mechanism 1-1 and a riding wheel group 1-2 for bearing the cast iron pipe 18, and at least one riding wheel of the riding wheel group 1-2 is connected with an output shaft of the driving mechanism 1-1.
As shown in figure 1, each riding wheel set 1-2 comprises two riding wheels, one riding wheel is arranged on one side of the axis of the cast iron pipe 18, the other riding wheel is arranged on the other side of the axis of the cast iron pipe 18, the two riding wheels are symmetrically arranged along the axis of the cast iron pipe 18, the axis directions of the riding wheels are the same as the axis direction of the cast iron pipe 18, at least one riding wheel is connected with a driving mechanism 1-1, the driving mechanism 1-1 drives the riding wheels to rotate, and the riding wheels drive the cast iron pipe 18 to rotate.
As a further improvement of the present invention, the apparatus further comprises a guide rail 16 provided outside the heating room 2, and the moving mechanism 3 has a degree of freedom of movement on the guide rail 16. As shown in fig. 1, the moving mechanism 3 is close to or far from the cast iron pipe 18 along the guide rail 16, so that the moving mechanism 3 can accurately move along a straight line, the deviation is avoided, and the spraying effect is better. The two ends of the guide rail 16 are provided with the detachable limiting baffle plates 19, so that the moving mechanism 3 can be prevented from sliding off the guide rail 16 in the moving process, and the device is safer and more reliable.
As a further improvement of the present invention, the apparatus further comprises an elevating mechanism 17 provided between the feeding duct 4 and the moving mechanism 3, and the feeding duct 4 has an elevating degree of freedom by extension and contraction of the elevating mechanism 17. As shown in figure 1, the heights of the feeding pipeline 4 and the spray head 6 can be changed by lifting the lifting mechanism 17 so as to meet the spraying requirements of cast iron pipes 18 with different pipe diameters.
The process for forming the plastic inner coating of the centrifugal nodular cast iron pipe by adopting the spraying method comprises the following steps:
a. placing a cast iron pipe 18 to be sprayed on a riding wheel group 1-1 of a bearing mechanism 1 in a heating room 2, and enabling the end surface of one end of the cast iron pipe 18 close to a moving mechanism 3 (namely a moving trolley) to be in contact with a catch wheel of a catch wheel group 14;
b. the distance d between the spray head 6 and the inner wall of the cast iron pipe 18 is adjusted by the lifting of the lifting mechanism 17, as shown in fig. 3, the gas pressure P entering the feeding pipeline 4 is adjusted by the gas control valve 5, and the cast iron pipe 18 is heated to the set temperature T by the heating room 2;
c. the method comprises the steps that a driving mechanism 1-1 of a bearing mechanism 1 is utilized to drive a riding wheel of a riding wheel group 1-1 to rotate, the riding wheel drives a cast iron pipe 18 to rotate at a speed V1, a moving mechanism 3 moves towards the direction of the cast iron pipe 18 along a guide rail 16 to drive a feeding pipeline 4 and a spray head 6 to move at a speed V2, the spray head 6 moves from one end to the other end in the cast iron pipe 18, a discharge valve 8 is opened, materials in a storage bin 7 enter the feeding pipeline 4 through a feeding port, high-pressure gas (such as nitrogen) enters the feeding pipeline 4 through a gas control valve 5, the materials entering the feeding pipeline 4 are sprayed out to the inner wall of the cast iron pipe 18 through the spray head 6, the coating in the cast iron pipe 18 is finished, cold air enters a cold air cavity between a cold air inlet pipe 9 and the feeding pipeline 4 through a cold air control valve 12 in the spraying process, the cold air cavity is cooled with the materials, the heated hot air enters a cold air cavity between the cold air inlet pipe 9 and the feeding pipeline 4 through a return air pipe 12 in the spraying device, the cold air inlet pipe 18 and the return air pipe 10, the cold air return valve is closed, the cold air valve 8 and the cold air inlet pipe 18 and the cold air inlet pipe 6 is closed, the cold air inlet pipe 18 and the cold air inlet and the cold air pipe 18, the cold air inlet pipe 18 and the cold air inlet pipe 6 is moved, the cold air inlet pipe 18, the cold air inlet and the cold air inlet pipe 6, the cold air inlet and the cold air inlet pipe 4, the cold air inlet pipe 18 is closed, the cold air outlet.
The high-pressure gas spraying method can realize full sealing, has no pollution to water, and the inner coating and the cast iron pipe are firmly and reliably bonded and are not easy to fall off.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The equipment for forming the plastic inner coating of the centrifugal nodular cast iron pipe by adopting the spraying method comprises a bearing mechanism (1) for bearing and driving a cast iron pipe (18) to rotate, and is characterized in that: the equipment further comprises a heating room (2), a moving mechanism (3), a feeding pipeline (4) arranged above the moving mechanism (3), a gas control valve (5) connected with the inlet end of the feeding pipeline (4), and a spray head (6) connected with the outlet end of the feeding pipeline (4), wherein a feed inlet is formed in the side wall of the feeding pipeline (4) between the spray head (6) and the gas control valve (5), the bearing mechanism (1) is positioned in the heating room (2), and the spray head (6) has the moving freedom degree of entering and exiting a cast iron pipe (18) positioned on the bearing mechanism (1) by means of the movement of the moving mechanism (3);
the equipment further comprises a cold air inlet pipe (9) sleeved on the outer side of the feeding pipeline (4), a return air pipe (10) sleeved on the outer side of the cold air inlet pipe (9), and a circulator (11), wherein a cavity between the cold air inlet pipe (9) and the feeding pipeline (4) is a cold air cavity, a cavity between the cold air inlet pipe (9) and the return air pipe (10) is a return air cavity, one end of the cold air cavity, which is far away from the spray head (6), is connected with a cold air control valve (12), one end of the return air cavity, which is far away from the spray head (6), is connected with the return air valve, one ends of the cold air cavity and the return air cavity, which are close to the spray head (6), are communicated with a communication cavity inside the circulator (11), the outlet end of the spray head (6) is positioned on the outer side of the circulator (11), and the inlet end of the spray head (6) penetrates through the circulator (11) to be connected with the outlet end of the feeding pipeline (4);
the device also comprises a heat-insulating layer (13) arranged on the outer side of the return air pipe (10);
the equipment also comprises a catch wheel group (14) arranged in the heating room (2), wherein the catch wheel of the catch wheel group (14) is in contact with the end surface of a cast iron pipe (18) arranged on the bearing mechanism (1) to form a limiting structure;
one end of the cast iron pipe (18) close to the moving mechanism (3) is provided with a blocking wheel set (14), the blocking wheel set (14) comprises a support and a blocking wheel which is in running fit with the support, the axis of the blocking wheel is vertically arranged, the circumferential surface of the blocking wheel is in contact with the cast iron pipe (18), and the outer diameter of the blocking wheel is linearly reduced from top to bottom.
2. The apparatus for forming a plastic inner coating of a centrifugal ductile iron pipe according to claim 1 by spray coating, wherein: the equipment further comprises a bin (7) arranged above the moving mechanism (3), the outlet of the bin (7) is connected with the feed inlet of the feed pipeline (4), and a discharge valve (8) is arranged at the outlet of the bin (7).
3. The apparatus for forming a plastic inner coating of a centrifugal ductile iron pipe according to claim 1 by spray coating, wherein: the equipment further comprises a bottom plate (15), and the catch wheel group (14) and the bearing mechanism (1) are arranged on the bottom plate (15).
4. The apparatus for forming a plastic inner coating of a centrifugal ductile iron pipe according to claim 1 by spray coating, wherein: the bearing mechanism (1) comprises a driving mechanism (1-1) and a riding wheel set (1-2) for bearing the cast iron pipe (18), and at least one riding wheel of the riding wheel set (1-2) is connected with an output shaft of the driving mechanism (1-1).
5. The apparatus for forming a plastic inner coating of a centrifugal ductile iron pipe according to claim 1 by spray coating, wherein: the device also comprises a guide rail (16) arranged outside the heating room (2), and the moving mechanism (3) has a moving degree of freedom on the guide rail (16).
6. The apparatus for forming a plastic inner coating of a centrifugal ductile iron pipe according to claim 1 by spray coating, wherein: the equipment further comprises a lifting mechanism (17) arranged between the feeding pipeline (4) and the moving mechanism (3), and the feeding pipeline (4) has a lifting degree of freedom by means of the stretching of the lifting mechanism (17).
7. The process for forming an internal plastic coating of a centrifugal ductile iron pipe according to claim 1 by spray coating, wherein: the process comprises the following steps:
a. placing a cast iron pipe (18) to be sprayed on a bearing mechanism (1) in a heating room (2);
b. heating the cast iron pipe (18) to a set temperature T by using a heating room (2);
c. the bearing mechanism (1) is utilized to drive the cast iron pipe (18) to rotate at a speed V1, the moving mechanism (3) drives the feeding pipeline (4) and the spray head (6) to move at a speed V2, so that the spray head (6) moves from one end to the other end in the cast iron pipe (18), high-pressure gas enters the feeding pipeline (4) through the gas control valve (5), and materials in the feeding pipeline (4) are sprayed onto the inner wall of the cast iron pipe (18) through the spray head (6), so that the spraying of an inner coating of the cast iron pipe (18) is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110913329.7A CN113617576B (en) | 2021-08-10 | 2021-08-10 | Equipment and process for forming centrifugal nodular cast iron pipe plastic inner coating by adopting spraying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110913329.7A CN113617576B (en) | 2021-08-10 | 2021-08-10 | Equipment and process for forming centrifugal nodular cast iron pipe plastic inner coating by adopting spraying method |
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| CN113617576A CN113617576A (en) | 2021-11-09 |
| CN113617576B true CN113617576B (en) | 2022-12-02 |
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2021
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| CN110774567A (en) * | 2019-11-13 | 2020-02-11 | 赵云凤 | Blow molding nozzle and blow molding machine |
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