CN114798274A - Spraying device for inner wall of large pipeline - Google Patents

Spraying device for inner wall of large pipeline Download PDF

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Publication number
CN114798274A
CN114798274A CN202210263987.0A CN202210263987A CN114798274A CN 114798274 A CN114798274 A CN 114798274A CN 202210263987 A CN202210263987 A CN 202210263987A CN 114798274 A CN114798274 A CN 114798274A
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CN
China
Prior art keywords
end cover
sliding
pipeline
spraying
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210263987.0A
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Chinese (zh)
Inventor
刘从贺
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Anhui Institute of Information Engineering
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Anhui Institute of Information Engineering
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Filing date
Publication date
Application filed by Anhui Institute of Information Engineering filed Critical Anhui Institute of Information Engineering
Priority to CN202210263987.0A priority Critical patent/CN114798274A/en
Publication of CN114798274A publication Critical patent/CN114798274A/en
Pending legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/12—Plant for applying liquids or other fluent materials to objects specially adapted for coating the interior of hollow bodies
    • 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
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment

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  • Spray Control Apparatus (AREA)

Abstract

The invention discloses a spraying device for the inner wall of a large-scale pipeline, which relates to the field of automatic spraying equipment and comprises a bearing base, a self-adaptive horizontal driving mechanism, an end cover assembly, a spraying assembly, an electrode, a conducting ring, an air inlet pipe and an exhaust pipe.

Description

Spraying device for inner wall of large pipeline
Technical Field
The invention belongs to the field of automatic spraying equipment, and particularly relates to a spraying device for an inner wall of a large pipeline.
Background
The ductile cast iron pipe has good mechanical property, corrosion resistance and extensibility, and is widely applied to places such as water supply, gas transmission, oil transmission and the like of municipal and industrial and mining enterprises. In the production process, the inner wall of the steel pipe needs to be painted so as to further improve the corrosion resistance of the steel pipe. The prior adopted modes comprise direct spraying, electrostatic spraying and the like, and for the electrostatic spraying, the common ductile iron pipeline has larger size, so the operation difficulty is high in practice, the efficiency is low, and the improvement is needed.
Disclosure of Invention
The invention aims to provide a spraying device for the inner wall of a large pipeline, which solves the defects caused in the prior art.
A spraying device for the inner wall of a large-scale pipeline comprises a bearing base, a self-adaptive horizontal driving mechanism, an end cover assembly, a spraying assembly, an electrode, a conducting ring, an air inlet pipe and an exhaust pipe, the bearing base is used for placing a pipeline to be sprayed, the self-adaptive horizontal driving mechanism is connected to the inner bottom surface of the bearing base in a sliding manner, the two end cover components are symmetrically arranged on the self-adaptive horizontal driving mechanism, the end cover components can synchronously move at a constant speed in opposite directions or in opposite directions under the action of the self-adaptive horizontal driving mechanism, each end cover component is provided with a spraying component for spraying paint into the pipeline and a conducting ring for heating the pipeline, the electrode is installed between the two end cover assemblies and used for electrostatic spraying of the inner wall of the pipeline, and the air inlet pipe and the air exhaust pipe are installed on the two end cover assemblies respectively and used for removing residual paint after spraying.
Preferably, the adaptive horizontal driving mechanism comprises a base, two-way lead screws, two slide bars, two slide seats and a servo motor, wherein two ends of each two-way lead screw are rotatably connected in the base, one end of each two-way lead screw is connected to the output end of the servo motor, the two slide bars are symmetrically arranged in the base and are arranged in the base, the two slide seats are symmetrically arranged and are slidably connected to the slide bars, and the two slide seats are respectively in threaded connection with two opposite-threaded parts on the two-way lead screws by means of respective lead screw nuts;
the bottom of base is installed the slider, installs on the interior bottom surface of bearing base with slider matched with slide rail, the base with the help of slider sliding connection on the slide rail.
Preferably, the end cover assembly comprises a circular end cover and a bracket, the circular end cover is fixed on the sliding seat by means of the bracket arranged on the outer side of the circular end cover, an annular groove is formed in the inner side of the end cover, and the conducting ring is arranged in the annular groove;
the geometric center of the round end cover is provided with a sliding sleeve matched with the electrode, and the electrode is rod-shaped and can penetrate through the sliding sleeve.
Preferably, the spraying assembly comprises a plurality of spray heads, and the spray heads are circumferentially distributed along the axis of the circular end cover.
Preferably, the two sides of the conducting ring are also provided with sealing rings, and the sealing rings are also arranged in the annular groove.
Preferably, the air inlet pipe and the air outlet pipe are respectively arranged on the two circular end covers and can be communicated with the interior of the pipeline.
Preferably, the positioning device further comprises a positioning assembly, the positioning assembly comprises a positioning column, a spring, a first wedge block and a second wedge block, the positioning column is connected in a guide hole in the bottom of the base in a sliding mode, the upper end of the positioning column is connected to the first wedge block, the spring is sleeved on the positioning column between the first wedge block and the base, and the inner side of the sliding seat is installed on the second wedge block matched with the first wedge block;
the slide is capable of temporarily fixing the position of the pipe by means of the locating assembly when the end cap assembly clamps the ends of the pipe closed.
Preferably, the outer side of the circular end cover is provided with a connector connected with the conducting ring, and the connector can be connected to a power supply by means of a conducting wire.
The invention has the advantages that:
(1) the invention realizes the rapid spraying of the inner wall of the large-scale ductile cast iron pipeline by means of the horizontally arranged bearing base and the end cover component, the spraying component, the electrode, the conducting ring, the air inlet pipe and the exhaust pipe which are matched with the bearing base, has simple structure and relatively convenient operation, improves the spraying efficiency, and simultaneously, as the base is connected on the sliding rail on the bearing base in a sliding way by means of the sliding block, the position of the geometric center of the pipeline can be adjusted by the self-adaptive horizontal driving mechanism along with the position change of the pipeline even if the pipeline is not righted in the axial direction.
(2) The invention also provides a positioning component which can be matched with the sliding seat, and the positioning column is pressed downwards after the wedge-shaped block II is contacted with the wedge-shaped block I, so that the lower end of the positioning column is contacted with the inner bottom surface of the bearing base, and the positions of the base and the pipeline are fixed, thereby ensuring that the pipeline can be in a stable state during spraying.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the support base and adaptive horizontal drive mechanism of the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a sectional view taken along a-a in fig. 3.
FIG. 5 is a schematic view of the clamped end cap assembly and pipe of the present invention.
Fig. 6 is a top view of fig. 5.
Fig. 7 is a sectional view taken along the direction B-B in fig. 6.
Fig. 8 is a partial enlarged view at C in fig. 7.
Wherein:
the device comprises a support base 1, a self-adaptive horizontal driving mechanism 2, a base 21, a two-way lead screw 22, a sliding rod 23, a sliding seat 24, a servo motor 25, an end cover assembly 3, a circular end cover 31, a support 32, an annular groove 33, a sealing ring 34, a sliding sleeve 35, a spraying assembly 4, an electrode 5, a conductive ring 6, a connector 61, an air inlet pipe 7, an exhaust pipe 8, a positioning assembly 9, a wedge block I91, a wedge block II 92, a positioning column 93, a spring 94, a sliding block 10 and a sliding rail 11, wherein the sliding rail is arranged on the support base;
100 pipes.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 8, a spraying device for the inner wall of a large-sized pipeline includes a supporting base 1, a self-adaptive horizontal driving mechanism 2, end cover assemblies 3, spraying assemblies 4, electrodes 5, conducting rings 6, an air inlet pipe 7 and an air outlet pipe 8, where the supporting base 1 is used to place a pipeline 100 to be sprayed, the self-adaptive horizontal driving mechanism 2 is slidably connected to the inner bottom surface of the supporting base 1, the end cover assemblies 3 are two and symmetrically installed on the self-adaptive horizontal driving mechanism 2, the end cover assemblies 3 can synchronously move at a constant speed in opposite directions or in opposite directions under the action of the self-adaptive horizontal driving mechanism 2, each end cover assembly 3 is installed with a spraying assembly 4 for spraying paint into the pipeline 100 and a conducting ring 6 for heating the pipeline 100, the electrodes 5 are installed between the two end cover assemblies 3 and used for electrostatic spraying of the inner wall of the pipeline 100, and the air inlet pipe 7 and the exhaust pipe 8 are respectively arranged on the two end cover assemblies 3 and are used for removing residual paint after spraying.
In this embodiment, the adaptive horizontal driving mechanism 2 includes a base 21, a bidirectional screw 22, two sliding rods 23, two sliding seats 24 and a servo motor 25, two ends of the bidirectional screw 22 are rotatably connected in the base 21, and one end of the bidirectional screw is connected to an output end of the servo motor 25, the two sliding rods 23 are symmetrically arranged and installed in the base 21, two sliding seats 24 are symmetrically arranged and slidably connected to the sliding rods 23, and the two sliding seats 24 are respectively in threaded connection with two opposite-threaded portions of the bidirectional screw 22 by means of respective screw nuts;
the bottom of the base 21 is provided with a slide block 10, the inner bottom surface of the bearing base 1 is provided with a slide rail 11 matched with the slide block 10, and the base 21 is connected on the slide rail 11 by the slide block 10 in a sliding way.
In this embodiment, the end cap assembly 3 includes a circular end cap 31 and a bracket 32, the circular end cap 31 is fixed on the slide carriage 24 by means of the bracket 32 installed on the outer side thereof, the inner side of the end cap is provided with an annular groove 33, the conductive ring 6 is installed in the annular groove 33, the purpose of the conductive ring 6 is, on one hand, to cooperate with the electrode 5 to realize electrostatic painting of the inner wall of the pipeline 100, and, on the other hand, to connect with a power supply to heat the pipeline 100 to realize drying of paint. Sealing rings 34 are further mounted on two sides of the conducting ring 6, the sealing rings 34 are also mounted in the annular groove 33, and the sealing rings 34 can improve the sealing performance between the circular end cover 31 and two ends of the pipeline 100 and avoid leakage of paint;
the geometric center of the circular end covers 31 is provided with a sliding sleeve 35 which is matched with the electrode 5, the electrode 5 is rod-shaped and can pass through the sliding sleeve 35, the electrode 5 is installed finally, namely, after the end cover assembly 3 is completely contacted and clamped with the two ends of the pipeline 100, the electrode 5 is installed between the two circular end covers 31 through the sliding sleeve 35 by means of a manipulator and is electrically connected to the negative high voltage generator. The outer side of the circular end cover 31 is provided with a connector 61 connected with the conductive ring 6, and the connector 61 can be connected to a power supply by means of a wire.
In this embodiment, the spraying component 4 includes a plurality of nozzles, and the nozzles are distributed along the axle center circumference of circular end cover 31, so, through setting up a plurality of nozzles, can accelerate spraying speed, and the homogeneity of spraying then can be improved to the circumference overall arrangement.
In this embodiment, the air inlet pipe 7 and the air outlet pipe 8 are respectively installed on two circular end covers 31 and can communicate with the inside of the pipeline 100, and the air outlet pipe 8 can be connected to an exhaust fan, so that residual paint in the pipeline 100 can be cleaned by the exhaust fan.
In this embodiment, the positioning device further includes a positioning assembly 9, the positioning assembly 9 includes a positioning column 93, a spring 94, a first wedge block 91 and a second wedge block 92, the positioning column 93 is slidably connected in a guiding hole at the bottom of the base 21, the upper end of the positioning column 93 is connected to the first wedge block 91, the spring 94 is sleeved on the positioning column 93 between the first wedge block 91 and the base 21, and the inner side of the sliding seat 24 is installed on the second wedge block 92 matched with the first wedge block 91;
when the end cap assembly 3 clamps and seals both ends of the pipe 100, the slide 24 can temporarily fix the position of the pipe 100 by means of the positioning assembly 9 to ensure that the pipe 100 is in a stable state during spraying.
The working process of the invention is as follows:
firstly, the pipeline 100 is hoisted to the bearing base 1, then the servo motor 25 is started, the bidirectional screw rod 22 rotates and drives the two end cover assemblies 3 which are symmetrically arranged to synchronously move in opposite directions until the two ends of the pipeline 100 are clamped tightly. Since the base 21 is slidably connected to the slide rails 11 on the support base 1 by means of the sliders 10, the adaptive horizontal drive mechanism 2 can adjust the position of the geometric center of the duct 100 as the position of the duct 100 changes, even if the duct 100 is not axially aligned. Meanwhile, after the second wedge block 92 contacts with the first wedge block 91, the positioning column 93 is pressed downwards, so that the lower end of the positioning column 93 contacts with the inner bottom surface of the bearing base 1, and the positions of the base 21 and the pipeline 100 are fixed.
Next, a certain amount of paint is sprayed into the interior of the pipe 100 by means of the spray assembly 4 and left for a period of time so that the paint can be uniformly dispersed, then the conductive ring 6 is electrically connected to the ground terminal of the negative high voltage generator so that the pipe 100 is grounded, and then the negative high voltage generator is activated and supplies the negative high voltage to the electrode 5. Therefore, the pipeline 100 is grounded, so that the potential of the pipeline is 0, a power plant is formed between the electrode 5 and the inner wall of the pipeline 100, the negatively charged atomized epoxy paint moves towards the inner wall of the pipeline 100 under the action of the electric field force and is adhered to the inner wall of the pipeline 100, the power is cut off after the power is on for a period of time, the exhaust fan is opened, the residual paint in the pipeline 100 is pumped away and removed, and then the drying process is carried out.
The two conducting rings 6 are respectively connected to the positive electrode and the negative electrode of the power supply to form a closed circuit loop, the power supply is started to heat the pipeline 100, and then paint on the inner wall of the pipeline 100 is dried. After the drying process is finished, the servo motor 25 rotates reversely, the end cover assembly 3 is separated from the pipeline 100, the positioning column 93 is reset along with the end cover assembly, the base 21 and the pipeline 100 are locked by contact, the pipeline 100 is removed, and the next product is prepared for spraying.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims (8)

1. A spraying device for the inner wall of a large pipeline is characterized by comprising a bearing base (1), a self-adaptive horizontal driving mechanism (2), an end cover assembly (3), spraying assemblies (4), electrodes (5), conducting rings (6), an air inlet pipe (7) and an air exhaust pipe (8), wherein the bearing base (1) is used for placing a pipeline (100) to be sprayed, the self-adaptive horizontal driving mechanism (2) is connected to the inner bottom surface of the bearing base (1) in a sliding manner, the end cover assembly (3) is provided with two spraying assemblies (4) which are symmetrically arranged on the self-adaptive horizontal driving mechanism (2), the end cover assembly (3) can synchronously move in opposite directions or in opposite directions at a constant speed under the action of the self-adaptive horizontal driving mechanism (2), each end cover assembly (3) is provided with the spraying assembly (4) used for spraying paint into the pipeline (100) and the conducting rings (6) used for heating the pipeline (100), the electrode (5) is arranged between the two end cover assemblies (3) and used for electrostatic spraying of the inner wall of the pipeline (100), and the air inlet pipe (7) and the air outlet pipe (8) are respectively arranged on the two end cover assemblies (3) and used for removing residual paint after spraying.
2. The spraying device for the inner wall of the large pipe according to claim 1, wherein: the self-adaptive horizontal driving mechanism (2) comprises a base (21), a bidirectional screw rod (22), a sliding rod (23), sliding seats (24) and a servo motor (25), wherein two ends of the bidirectional screw rod (22) are rotatably connected into the base (21) and one end of the bidirectional screw rod is connected to the output end of the servo motor (25), the two sliding seats (23) are symmetrically arranged and installed in the base (21), the two sliding seats (24) are symmetrically arranged and slidably connected onto the sliding rod (23), and the two sliding seats (24) are respectively in threaded connection with two opposite-threaded parts on the bidirectional screw rod (22) by means of respective screw nuts;
the bottom of the base (21) is provided with a sliding block (10), the inner bottom surface of the bearing base (1) is provided with a sliding rail (11) matched with the sliding block (10), and the base (21) is connected to the sliding rail (11) in a sliding mode through the sliding block (10).
3. The spraying device for the inner wall of the large pipe according to claim 2, wherein: the end cover assembly (3) comprises a circular end cover (31) and a support (32), the circular end cover (31) is fixed on the sliding seat (24) by means of the support (32) arranged on the outer side of the circular end cover, an annular groove (33) is formed in the inner side of the end cover, and the conducting ring (6) is arranged in the annular groove (33);
the geometric center of the circular end cover (31) is provided with a sliding sleeve (35) matched with the electrode (5), and the electrode (5) is rod-shaped and can penetrate through the sliding sleeve (35).
4. A coating apparatus for an inner wall of a large pipe according to claim 3, wherein: the spraying component (4) comprises a plurality of spray heads which are distributed along the axial center circumference of the circular end cover (31).
5. A coating apparatus for an inner wall of a large pipe according to claim 3, wherein: and sealing rings (34) are also arranged on two sides of the conducting ring (6), and the sealing rings (34) are also arranged in the annular groove (33).
6. A coating apparatus for an inner wall of a large pipe according to claim 3, wherein: the air inlet pipe (7) and the air outlet pipe (8) are respectively arranged on the two circular end covers (31) and can be communicated with the interior of the pipeline (100).
7. The spraying device for the inner wall of the large pipe according to claim 2, wherein: the positioning device is characterized by further comprising a positioning assembly (9), wherein the positioning assembly (9) comprises a positioning column (93), a spring (94), a first wedge block (91) and a second wedge block (92), the positioning column (93) is connected in a guide hole in the bottom of the base (21) in a sliding mode, the upper end of the positioning column (93) is connected to the first wedge block (91), the spring (94) is sleeved on the positioning column (93) between the first wedge block (91) and the base (21), and the inner side of the sliding seat (24) is installed on the second wedge block (92) matched with the first wedge block (91);
when the end cap assembly (3) clamps and seals both ends of the pipeline (100), the sliding seat (24) can temporarily fix the position of the pipeline (100) by means of the positioning assembly (9).
8. A coating apparatus for an inner wall of a large pipe according to claim 3, wherein: the outer side of the circular end cover (31) is provided with a connector (61) connected with the conducting ring (6), and the connector (61) can be connected to a power supply by means of a conducting wire.
CN202210263987.0A 2022-03-17 2022-03-17 Spraying device for inner wall of large pipeline Pending CN114798274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210263987.0A CN114798274A (en) 2022-03-17 2022-03-17 Spraying device for inner wall of large pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210263987.0A CN114798274A (en) 2022-03-17 2022-03-17 Spraying device for inner wall of large pipeline

Publications (1)

Publication Number Publication Date
CN114798274A true CN114798274A (en) 2022-07-29

Family

ID=82529174

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210263987.0A Pending CN114798274A (en) 2022-03-17 2022-03-17 Spraying device for inner wall of large pipeline

Country Status (1)

Country Link
CN (1) CN114798274A (en)

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