Steel pipe inner surface degreasing and flushing equipment

Abstract

The invention discloses a degreasing and flushing device for the inner surface of a steel pipe, comprising a pipe rotating mechanism, a flushing mechanism, a position changing mechanism, a frame and a central controller. The pipe rotating mechanism is installed on the frame and can drive the supported horizontal steel pipe to rotate. The flushing mechanism has a nozzle that can spray pickling liquid. The position changing mechanism is installed on the frame and can drive the nozzle to enter and exit the steel pipe along the pipeline. The central controller is electrically connected to the pipe rotating mechanism, the flushing mechanism and the position changing mechanism respectively, so that impurities such as free rust, large dust particles, welding slag and grease adhering to the inner surface of the pipeline can be automatically dropped off under the high-pressure continuous flushing action of the pickling liquid, thereby avoiding the residual stubborn impurities in the steel pipe and ensuring the high quality of the steel pipe before leaving the factory.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipes, in particular to the technical field of steel pipe flushing. Background Art

[0002] As my country's industrial development shifts from quantity to quality, steel pipes are increasingly used in industries such as petrochemicals, energy, medical care and aviation, and customers are increasingly demanding on the delivery status of steel pipes. At present, it is generally required that the inner and outer surfaces of steel pipes must be free of impurities such as free rust, large particles of dust, welding slag and grease, while steel pipes for special purposes have more stringent requirements on cleanliness. For example, oxygen pipes (mostly used to transport oxygen with a purity greater than 99.99%, with the characteristics of high pressure and fast oxygen flow rate) if the inside of the pipe cannot be kept clean, the oil and metal ions remaining on the inner wall of the pipe may be oxidized and collided during contact with high-pressure pure oxygen, thereby generating electric sparks and even causing serious accidents.

[0003] At present, steel pipes are generally degreased by pickling process during the production process, such as a steel pipe degreasing and cleaning device with announcement number CN106521535B and a seamless steel pipe processing process with announcement number CN110938815B; specifically, when degreasing, the factory will directly immerse the bundled steel pipes into the acid tank, and then control the immersion time according to different materials, so as to utilize the corrosion and stripping effects of the pickling solution to achieve the purpose of degreasing; however, this degreasing effect on some stubborn impurities on the inner surface of the pipe is relatively limited, especially when the immersion time is short. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a degreasing and flushing device for the inner surface of a steel pipe, which can automatically remove impurities such as free rust, large particles of dust, welding slag and grease adhered to the inner surface of the pipe under the high-pressure continuous flushing action of the pickling liquid, thereby avoiding the residual stubborn impurities in the steel pipe and ensuring the high quality of the steel pipe before leaving the factory.

[0005] To achieve the above-mentioned purpose, the present invention proposes a degreasing and flushing device for the inner surface of a steel pipe, comprising a pipe rotating mechanism, a flushing mechanism, a position changing mechanism, a frame and a central controller. The pipe rotating mechanism is installed on the frame and can drive the supported horizontal steel pipe to rotate. The flushing mechanism has a nozzle that can spray pickling liquid. The position changing mechanism is installed on the frame and can drive the nozzle to enter and exit the steel pipe along the pipeline. The central controller is electrically connected to the pipe rotating mechanism, the flushing mechanism and the position changing mechanism respectively.

[0006] Preferably, the pipe rotating mechanism includes a passive roller, an active roller, a roller frame and a driving roller motor, a plurality of the passive rollers are indirectly connected to the frame through the roller frames and are horizontally arranged in two rows, front and rear, the active roller is parallel to and fits with at least one of the passive rollers, the active roller is indirectly connected to the frame through the roller frame and is driven to rotate by the driving roller motor.

[0007] Preferably, the active roller and each passive roller are respectively covered with anti-slip rubber.

[0008] Preferably, the frame comprises a supporting base and a supporting pedestal, wherein the supporting base is mounted on the top of the supporting pedestal and has a notch through which the steel pipe can pass, and each of the passive rollers is arranged on the front and rear sides of the notch, respectively.

[0009] Preferably, it also includes a unloading mechanism, which includes a unloading cylinder, a unloading slider and a unloading track, the unloading track is installed on the supporting base plate, the unloading slider is slidably connected to the unloading track, the telescopic rod of the unloading cylinder is fixed to the unloading slider, the unloading slider is indirectly connected to each passive roller and the corresponding roller frame located on one side of the notch through a connecting piece, and the central controller is electrically connected to the unloading mechanism.

[0010] Preferably, the flushing mechanism comprises a conduit, a nozzle, a hose, a liquid pump and a liquid tank. The nozzle is installed on the conduit. The conduit is connected to a liquid tank filled with pickling liquid through a hose and a liquid pump is also installed on the pipeline.

[0011] Preferably, the transposition mechanism includes a transposition motor, a transposition nut, a transposition screw, a transposition slider and a transposition rail. The transposition motor and the transposition rail are respectively fixed on the top of the frame. The transposition nut is rotatably built into the transposition motor. The transposition screw horizontally penetrates the transposition motor and is threadedly connected to the transposition nut. The transposition slider is slidably connected to the transposition rail and is respectively fixed to the conduit and the transposition screw.

[0012] Preferably, the flushing mechanism also includes a three-way joint and a plug, one end of the catheter is equipped with a nozzle and the other end is connected to the first end of the three-way joint, the second end of the three-way joint is connected to the hose, the third end of the three-way joint is blocked by the plug, and a socket is also provided on the transposition slider, and the transposition slider is indirectly connected to the catheter via the plug plugged into the socket.

[0013] Beneficial effects of the present invention: 1) By combining the pipe rotating mechanism, flushing mechanism, transposition mechanism, rack and central controller, the pipe rotating mechanism can be used to drive the supported horizontal steel pipe to rotate, and then the transposition mechanism can be used to move the nozzle capable of spraying pickling liquid in and out of the steel pipe along the pipe, so that the free rust, large dust particles, welding slag, grease and other impurities adhering to the inner surface of the pipe can be automatically removed under the high-pressure continuous flushing of the pickling liquid, avoiding the residual stubborn impurities in the steel pipe and ensuring the high quality of the steel pipe before leaving the factory; 2) By using a conduit and a nozzle as the flushing body of the flushing mechanism, and using a three-way joint, a plug and a socket at the end of the conduit to realize a plug-in connection between the conduit and the transposition slider, it is not only convenient to select a flushing body of corresponding size according to the channel size and install it on the transposition mechanism, but also convenient to inspect and clean the flushing body in the later stage; 3) By adding a gap for the steel pipe to pass through at the supporting base plate of the frame, a feeding mechanism composed of a feeding cylinder, a feeding slide and a feeding track is added to adjust the distance between the front and rear rows, so that the flushed steel pipe can be automatically fed under the action of gravity, and when the feeding cylinder is a multi-position cylinder, it can also assist the pipe rotating mechanism to achieve stable support for steel pipes with different outer diameters.

[0014] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view of the first embodiment; Figure 2 It is a schematic diagram of the assembly of the passive roller, the active roller, the roller frame and the supporting base plate of the first embodiment; Figure 3 This is a front view of the first embodiment when the transposition mechanism and the supporting base are removed; Figure 4 is a front view of the transposition mechanism of the first embodiment; Figure 5 It is an assembly diagram of the passive roller, the active roller, the roller frame, the supporting base plate and the unloading mechanism of the second embodiment.

[0016] In the figure: 1-pipe rotating mechanism, 11-passive roller, 12-active roller, 13-roller frame, 14-drive roller motor, 2-flushing mechanism, 21-conduit, 22-sprinkler, 23-tee joint, 24-plug, 3-transposition mechanism, 31-transposition motor, 32-transposition nut, 33-transposition screw rod, 34-transposition slider, 35-transposition rail, 36-socket, 4-frame, 41-support base plate, 411-notch, 42-support base, 5-unloading mechanism, 51-unloading cylinder, 52-unloading slider, 53-unloading rail, 6-steel pipe. DETAILED DESCRIPTION

[0017] Embodiment 1: See also Figures 1 to 4 The degreasing and flushing equipment for the inner surface of a steel pipe of the present invention comprises a pipe rotating mechanism 1, a flushing mechanism 2, a position changing mechanism 3, a frame 4 and a central controller. The pipe rotating mechanism 1 is installed on the frame 4 and can drive the supported horizontal steel pipe 6 to rotate. The flushing mechanism 2 has a nozzle 22 that can spray pickling liquid. The position changing mechanism 3 is installed on the frame 4 and can drive the nozzle 22 to enter and exit the steel pipe 6 along the pipeline. The central controller is electrically connected to the pipe rotating mechanism 1, the flushing mechanism 2 and the position changing mechanism 3 respectively.

[0018] The pipe rotating mechanism 1 includes a passive roller 11, an active roller 12, a roller frame 13 and a driving roller motor 14. Several of the passive rollers 11 are indirectly connected to the frame 4 through the roller frames 13 and are horizontally arranged in two rows, front and back. The active roller 12 is parallel to and fits with at least one of the passive rollers 11. The active roller 12 is indirectly connected to the frame 4 through the roller frame 13 and is driven to rotate by the driving roller motor 14.

[0019] The active roller 12 and each passive roller 11 are respectively covered with anti-skid rubber.

[0020] The flushing mechanism 2 includes a conduit 21, a nozzle 22, a hose, a liquid pump and a liquid tank. The nozzle 22 is installed on the conduit 21. The conduit 21 is connected to a liquid tank filled with pickling liquid through a hose, and a liquid pump is also installed on the pipeline.

[0021] The transposition mechanism 3 includes a transposition motor 31, a transposition nut 32, a transposition screw rod 33, a transposition slider 34 and a transposition track 35. The transposition motor 31 and the transposition track 35 are respectively fixed on the top of the frame 4. The transposition nut 32 is rotatably built into the transposition motor 31. The transposition screw rod 33 horizontally penetrates the transposition motor 31 and is threadedly connected to the transposition nut 32. The transposition slider 34 is slidably connected to the transposition track 35 and is respectively fixed to the catheter 21 and the transposition screw rod 33.

[0022] The flushing mechanism 2 also includes a three-way joint 23 and a plug 24. A nozzle 22 is installed at one end of the conduit 21 and the other end is connected to the first end of the three-way joint 23. The second end of the three-way joint 23 is connected to a hose. The third end of the three-way joint 23 is blocked by the plug 24. A socket 36 is also provided on the transposition slider 34. The transposition slider 34 is indirectly connected to the conduit 21 through the plug 24 plugged into the socket 36.

[0023] The working process of this embodiment: When in use, the steel pipe 6 is first placed on the top of each passive roller 11, and then the driving roller motor 14 is used to drive the active roller 12 to rotate, so that the active roller 12 and each passive roller 11 drive the steel pipe 6 to rotate synchronously; during the rotation of the steel pipe 6, the transposition motor 31 can drive the transposition nut 32 to rotate and use the transposition screw rod 33 to drive the transposition slider 34 to move along the transposition track 35, so that the nozzle 22 gradually moves along the length direction in the pipeline and flushes the inner surface of the steel pipe 6 section by section through the sprayed pickling liquid.

[0024] Embodiment 2: See also Figure 5 The frame 4 includes a supporting base plate 41 and a supporting pedestal 42 . The supporting base plate 41 is installed on the top of the supporting pedestal 42 and has a notch 411 for the steel pipe 6 to pass through. The passive rollers 11 are arranged on the front and rear sides of the notch 411 .

[0025] It also includes a feeding mechanism 5, which includes a feeding cylinder 51, a feeding slide 52 and a feeding track 53, wherein the feeding track 53 is installed on the supporting base plate 41, the feeding slide 52 is slidably connected to the feeding track 53, the telescopic rod of the feeding cylinder 51 is fixed to the feeding slide 52, the feeding slide 52 is indirectly connected to each passive roller 11 and the corresponding roller frame 13 located on one side of the notch 411 through a connecting piece, and the central controller is electrically connected to the feeding mechanism 5; wherein, the feeding cylinder 51 can select a multi-position cylinder with multiple pushing strokes, and can also be replaced by an electric push rod that can accurately adjust the pushing stroke as required.

[0026] The rest is the same as in the first embodiment.

[0027] The working process of this embodiment: In this embodiment, after the flushing operation is completed, the shifting mechanism 3 first pulls the nozzle 22 out of the pipeline; then, the unloading cylinder 41 contracts the telescopic rod, thereby using the unloading slider 52 that gradually moves away from the steel pipe 6 along the unloading track 53 to drive the front and rear rows of passive rollers 11 to separate from each other, until the steel pipe 6 can automatically fall along the notch 411 under the action of gravity and complete the unloading operation.

[0028] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. Steel pipe inner surface degreasing and flushing equipment, characterized by: The invention comprises a pipe rotating mechanism (1), a flushing mechanism (2), a position changing mechanism (3), a frame (4) and a central controller, wherein the pipe rotating mechanism (1) is mounted on the frame (4) and can drive a supported horizontal steel pipe (6) to rotate, the flushing mechanism (2) has a nozzle (22) capable of spraying pickling liquid, the position changing mechanism (3) is mounted on the frame (4) and can drive the nozzle (22) to enter and exit the steel pipe (6) along the pipeline, and the central controller is electrically connected to the pipe rotating mechanism (1), the flushing mechanism (2) and the position changing mechanism (3) respectively.

2. The steel pipe inner surface degreasing and flushing equipment according to claim 1, characterized in that: The pipe rotating mechanism (1) comprises a passive roller (11), an active roller (12), a roller frame (13) and a roller driving motor (14); a plurality of passive rollers (11) are indirectly connected to the frame (4) via the roller frames (13) and are horizontally arranged in two rows, front and back; the active roller (12) is parallel and in contact with at least one of the passive rollers (11); the active roller (12) is indirectly connected to the frame (4) via the roller frame (13) and is driven to rotate by the roller driving motor (14).

3. The steel pipe inner surface degreasing and flushing equipment according to claim 2, characterized in that: The active roller (12) and each passive roller (11) are respectively coated with anti-slip rubber.

4. The steel pipe inner surface degreasing and flushing equipment according to claim 2, characterized in that: The frame (4) comprises a support base (41) and a support pedestal (42); the support base (41) is mounted on the top of the support pedestal (42) and has a notch (411) through which the steel pipe (6) can pass; and the passive rollers (11) are arranged on the front and rear sides of the notch (411).

5. The steel pipe inner surface degreasing and flushing equipment according to claim 4, characterized in that: The invention also comprises a material unloading mechanism (5), wherein the material unloading mechanism (5) comprises a material unloading cylinder (51), a material unloading slider (52) and a material unloading track (53), wherein the material unloading track (53) is mounted on a supporting base plate (41), the material unloading slider (52) is slidably connected to the material unloading track (53), the telescopic rod of the material unloading cylinder (51) is fixed to the material unloading slider (52), the material unloading slider (52) is indirectly connected to each passive roller (11) and a corresponding roller frame (13) located on one side of the notch (411) through a connecting piece, and the central controller is electrically connected to the material unloading mechanism (5).

6. The steel pipe inner surface degreasing and flushing equipment according to claim 1, characterized in that: The flushing mechanism (2) comprises a conduit (21), a nozzle (22), a hose, a liquid pump and a liquid tank. The nozzle (22) is installed on the conduit (21). The conduit (21) is connected to a liquid tank filled with pickling liquid through the hose, and a liquid pump is also installed on the pipeline.

7. The steel pipe inner surface degreasing and flushing equipment according to claim 6, characterized in that: The transposition mechanism (3) comprises a transposition motor (31), a transposition nut (32), a transposition screw rod (33), a transposition slider (34) and a transposition track (35). The transposition motor (31) and the transposition track (35) are respectively fixed on the upper side of the frame (4). The transposition nut (32) is rotatably built into the transposition motor (31). The transposition screw rod (33) horizontally penetrates the transposition motor (31) and is threadedly connected to the transposition nut (32). The transposition slider (34) is slidably connected to the transposition track (35) and is respectively fixed to the guide tube (21) and the transposition screw rod (33).

8. The steel pipe inner surface degreasing and flushing equipment according to claim 7, characterized in that: The flushing mechanism (2) further comprises a three-way joint (23) and a plug (24); one end of the conduit (21) is provided with a nozzle (22) and the other end is connected to the first end of the three-way joint (23); the second end of the three-way joint (23) is connected to a hose; the third end of the three-way joint (23) is blocked by the plug (24); a socket (36) is further provided on the transposition slider (34); the transposition slider (34) is indirectly connected to the conduit (21) via the plug (24) plugged into the socket (36).

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