CN110681705B - Purging pre-degreasing device and method for cold-rolled seamless stainless steel tube - Google Patents
Purging pre-degreasing device and method for cold-rolled seamless stainless steel tube Download PDFInfo
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- CN110681705B CN110681705B CN201911054371.7A CN201911054371A CN110681705B CN 110681705 B CN110681705 B CN 110681705B CN 201911054371 A CN201911054371 A CN 201911054371A CN 110681705 B CN110681705 B CN 110681705B
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 237
- 239000010935 stainless steel Substances 0.000 title claims abstract description 237
- 238000005238 degreasing Methods 0.000 title claims abstract description 166
- 238000010926 purge Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- 238000005097 cold rolling Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims description 56
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 238000000926 separation method Methods 0.000 claims description 27
- 238000011010 flushing procedure Methods 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0284—Cleaning devices removing liquids removing lubricants
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a device and a method for purging and pre-degreasing a cold-rolled seamless stainless steel tube, which are combined together with the cold-rolling process of the stainless steel tube and are connected with the discharging process of the cold-rolling process of the stainless steel tube, the method adopted by the invention is that the seamless stainless steel tube is put into an outer circular sleeve which is more than 1.5 times larger than the diameter of the seamless stainless steel tube, one end of the seamless stainless steel tube is closed, a guide rod is added at the position of the seamless stainless steel tube, high-pressure and high-speed degreasing water flow is purged from one end of the inner side of the seamless stainless steel tube to the other end of the seamless stainless steel tube, and then the degreasing water flow is purged from a gap between the seamless stainless steel tube and the outer circular sleeve; the pre-degreasing method can solve the problem of discharging pollution of the cold-rolled finished tube and can also improve the effect of the follow-up degreasing process.
Description
Technical Field
The invention relates to a purging pre-degreasing device and method for a cold-rolled seamless stainless steel tube, belonging to the technical field of stainless steel tube molding engineering.
Background
The rolling oil inside and outside the stainless steel tube plays a role in lubrication in the cold rolling process of the stainless steel tube, but the inner and outer surfaces of the stainless steel tube are oil after rolling, the inner and outer surfaces of the stainless steel tube are difficult to remove oil, the degreasing process is difficult, the degreasing efficiency is low, and how to clean the inner and outer surfaces of the stainless steel tube in the cold rolling process of the stainless steel tube and create better conditions for the next degreasing process becomes a problem to be solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a device and a method for purging and pre-degreasing a cold-rolled seamless stainless steel tube, which clean lubricating oil in the cold-rolling process of the stainless steel tube without polluting the environment and create conditions for improving the degreasing effect in the next step.
The invention is realized by the following technical scheme:
the cold rolling seamless stainless steel tube purging pre-degreasing device comprises a structural support arranged on a purging central line, wherein a high-pressure degreasing water tank part, a stainless steel tube leading-in mechanical arm, a stainless steel tube leading-out mechanical arm, a pushing clamp, an outer circular sleeve and an outer circular sleeve guide system are arranged on the structural support; the high-pressure degreasing water tank part is positioned at one end of the flushing center line, the outer circular sleeve guide system is positioned at the other end of the flushing center line, and a stainless steel pipe guiding-in mechanical arm, a stainless steel pipe guiding-out mechanical arm, a pushing clamp and an outer circular sleeve guide system are arranged on a structural support between the high-pressure degreasing water tank part and the outer circular sleeve guide system; the stainless steel pipe guiding-in mechanical arm and the stainless steel pipe guiding-out mechanical arm are respectively arranged at two sides of the pushing clamp, the pushing clamp is arranged at one side of the high-pressure degreasing water tank, the center of the pushing clamp is provided with a clamping part, the center line of a clamping opening of the clamping part is arranged on the flushing center line, and the stainless steel pipe is movably clamped in the clamping part;
the outer circular sleeve guiding system comprises a wire rope, a winding drum, a pneumatic motor, a guide pulley, a row of rollers and an outer circular sleeve, wherein the wire rope and the winding drum are arranged on a mechanism support of a purging central line, the pneumatic motor, the guide pulley, the row of rollers and the outer circular sleeve are coaxially connected with the wire rope winding drum, the wire rope is wound on the wire rope winding drum, the guide pulley and the row of rollers are connected with the outer circular sleeve, one end of the wire rope is connected with the rear end of the outer circular sleeve, and the other end of the wire rope is connected with a tube body of the middle of the outer circular sleeve, which is close to the front end.
The high-pressure degreasing water tank part comprises a plurality of Y-shaped outlet pipes, a degreasing waste liquid recovery tank, a lower high-pressure tank, an upper high-pressure tank and a gas-liquid separation tank which are arranged from bottom to top, wherein the lower high-pressure tank, the upper high-pressure tank and the gas-liquid separation tank are placed on the same vertical central line, and the degreasing waste liquid recovery tank is movable;
the upper high-pressure tank comprises three inlets and outlets, wherein the first inlet and outlet is arranged at the upper part of the side surface of the tank body, the degreasing water preparation tank is connected through a degreasing water inlet pipe, the second inlet and outlet is arranged at the side surface of the tank body, a plurality of Y-shaped outlet pipes are connected, and the third inlet and outlet is connected with a high-pressure air source inlet pipe;
the lower high-pressure tank comprises three inlets and outlets, wherein the first inlet and outlet is arranged at the bottom of the tank, the first inlet and outlet is connected with the degreasing waste liquid recovery tank through a degreasing water discharge pipe, the second inlet and outlet is arranged at the side surface of the tank body, the second inlet and outlet is provided with an inverted horn mouth and is connected with a Y-shaped outlet pipe, and the third inlet and outlet is arranged at the upper part of the side surface of the tank body and is connected with a high-pressure air source inlet pipe;
the high-pressure air source inlet pipe is connected with a high-pressure air source, a first air source switching electromagnetic valve and a second air source switching electromagnetic valve are arranged on the high-pressure air source inlet pipe, outlets of the first air source switching electromagnetic valve are respectively connected with a Y-shaped outlet pipe and the second air source switching electromagnetic valve, the second air source switching electromagnetic valve comprises an inlet, an outlet and two inlets and outlets, the inlet of the second air source switching electromagnetic valve is connected with the outlet of the first air source switching electromagnetic valve, the outlet of the second air source switching electromagnetic valve is connected with the air-liquid separation tank, and the two inlets and outlets of the second air source switching electromagnetic valve are respectively connected with a third inlet and outlet of the upper high-pressure tank and a third inlet and outlet of the lower high-pressure tank.
The multi-Y-shaped outlet pipe comprises a first Y-shaped pipe, a second Y-shaped pipe and a concentric outlet pipe, wherein the inlet apertures of the first Y-shaped pipe and the second Y-shaped pipe are larger than the outlet aperture, the inlets are bell mouths, the inlet of the first Y-shaped pipe is connected with the second inlet and outlet of the upper high-pressure tank, and the inlet pipe of the second Y-shaped pipe is connected with the second inlet and outlet of the lower high-pressure tank; the inlet of the first Y-shaped pipe is also connected with the outlet of the first air source switching electromagnetic valve;
the concentric outlet pipe comprises an inner pipe and an outer pipe which are concentric and are not communicated with each other in the Y-shaped outlet pipe, and a circumferential gap is reserved between the inner pipe and the outer pipe; the inlet of the inner tube is connected with a first Y-shaped tube, and the shape and the size of the outlet of the inner tube are matched with those of the stainless steel tube, so that the stainless steel tube is tightly inserted into the outlet of the inner tube; the inlet of the outer tube is connected with a second Y-shaped tube, and the outlet of the outer tube is connected with an outer circular sleeve; the central axes of the concentric inner tube and outer tube are on the purge centerline; the outlet of the concentric outlet pipe is opposite to the upper opening clamping opening of the pushing clamp.
The stainless steel pipe guiding-in mechanical arm and the stainless steel pipe guiding-out mechanical arm are mechanical arms swinging leftwards and rightwards and are positioned at the middle part of the stainless steel pipe, the guiding-in end point of the stainless steel pipe guiding-out mechanical arm, the guiding-out starting point of the stainless steel pipe guiding-out mechanical arm, the axial center line of the stainless steel pipe and the purging center line are overlapped or are on the same straight line, a row of rollers are arranged below the stainless steel pipe of the purging center line, and guiding arc rods are further arranged on two sides of each roller.
The outer circular sleeve is arranged above a row of rollers, a steel wire rope winding drum is arranged below the outer circular sleeve, the steel wire rope winding drum and the rotating shaft are connected with a pneumatic motor, and steel wire ropes are wound on the steel wire rope winding drum for a plurality of circles;
the end of the outer circular sleeve is closed, a circular arc-shaped flow director is arranged in the closed end, the circular arc-shaped flow director comprises a semicircular ball sleeved at the maximum position of the closed end of the outer circular sleeve and a flow guiding rod connected with the center of the bottom of the spherical surface, the top of the flow guiding rod is a tip, a clockwise or anticlockwise spiral flow guiding sheet is arranged at the bottom of the inner wall of the outer circular sleeve from the tip, the rear part of the tip is connected with the bottom of the semicircular ball spherical surface through a flow guiding hose, and the length and the diameter of the flow guiding rod can extend into a purged stainless steel pipe and are high in strength;
the outer circular sleeve is provided with two limiting devices, and the first limiting device enables the outer circular sleeve to move forwards along the purging central line after penetrating into the stainless steel pipe from the pipe orifice until the outer circular sleeve is inserted into the outer pipe in the Y-shaped pipe outlet; the second limiting device enables the outer circular sleeve to be pulled out of the outer tube in the Y-shaped tube outlet and then move backwards along the purging central line until all the outer circular sleeve exits the stainless steel tube; the two limiting devices adopt a proximity switch for detection.
The diameter of the outer circular sleeve is more than 1.5 times of that of the stainless steel pipe, and the outer circular sleeve is more than 50mm longer than the stainless steel pipe.
A cold rolling stainless steel tube pre-degreasing method, link to stainless steel tube cold rolling procedure discharge process, put stainless steel tube into more than 1.5 times and one end closed excircle sleeve pipe than its diameter, there are guide bars in the said excircle sleeve pipe, the degreasing water airstream of high pressure and high speed is from one end of the inside of the seamless stainless steel tube to blow out the seamless stainless steel tube positively, after degreasing water airstream to its another end, blow out from the gap of seamless stainless steel tube and excircle sleeve pipe; after t time, the degreasing water gas flow with high pressure and high speed is purged from one end of the gap between the seamless stainless steel tube and the outer circular sleeve tube in a reverse direction until the other end of the gap is purged from the seamless stainless steel tube, and after n times of purging of the degreasing water gas flow with positive and negative directions, the degreasing water gas flow is purged through the cleaning of the high pressure and high speed gas flow.
The pre-degreasing method for the cold-rolled stainless steel tube specifically comprises the following steps:
step one, after a stainless steel pipe is separated from an outlet of a stainless steel cold rolling mill, a stainless steel pipe guiding mechanical arm swings leftwards or rightwards, the stainless steel pipe is guided to a row of rollers on a flushing central line, a pushing clamp clamps the stainless steel pipe and pushes the stainless steel pipe forwards into an inner pipe in a multi-Y-shaped outlet pipe, and then the stainless steel pipe pushing clamp loosens the stainless steel pipe;
step two, the outer circular sleeve is positioned at a second limiting position, after the pushing clamp clamps the stainless steel tube, the pneumatic motor drives the coaxial steel wire rope reel to rotate, the steel wire rope drives the outer circular sleeve through the guide pulley, the stainless steel tube penetrates into the outer circular sleeve and moves forwards along the purging central line until the stainless steel tube reaches a first limit, and the outer circular sleeve is inserted into an outer tube in a multi-Y-shaped tube outlet;
step three, before the outer circular sleeve sleeves the stainless steel tube into the tube, the liquid outlet of the liquid inlet electromagnetic valve is opened, degreasing water is prepared and enters the upper high-pressure tank from the liquid inlet tube on the side, degreasing water is added once after n stainless steel tubes are purged, and n is determined by a process test;
step four, after the outer circular sleeve and the stainless steel tube are inserted into the outer tube in the outlet of the Y-shaped tube, the first air source switching electromagnetic valve guides the high-pressure air source into the first air source switching electromagnetic valve, the first air source switching electromagnetic valve connects the high-pressure air source into the upper high-pressure tank, and simultaneously, the high-pressure air source inlet pipe of the lower high-pressure tank is connected into the outlet air release pipe to the gas-liquid separation tank;
step five, forward purging of high-pressure high-speed degreasing water gas flow: after the high-pressure air source enters the upper high-pressure tank, the degreasing water in the tank is strongly stirred to form high-pressure high-speed degreasing water air flow, the degreasing water flow enters the stainless steel pipe through the inverted horn mouth of the tank side wall of the upper high-pressure tank and the inner pipe in the connected multi-Y-shaped outlet pipe, and the high-pressure high-speed degreasing water flow forms strong blowing and washing on the inner wall of the stainless steel pipe; after the high-pressure high-speed degreasing water gas flows out of the stainless steel pipe through the circular arc-shaped flow guide, the degreasing water gas enters a circumferential gap between the stainless steel pipe and the outer circular sleeve, the outer wall of the stainless steel pipe is blasted forwards, then enters a lower high-pressure tank through an outer pipe and a reverse horn mouth in a multi-Y-shaped outlet pipe, the high-pressure gas is discharged to a gas-liquid separation tank along with a small amount of degreasing water through a high-pressure gas inlet pipe at the side surface of the lower high-pressure tank and a second gas source switching electromagnetic valve outlet gas discharge pipe, and most degreasing water is left in the lower high-pressure tank;
step six, reversely purging the high-pressure high-speed degreasing water flow: after t1 time, the action of the second air source switching electromagnetic valve is switched, the second air source switching electromagnetic valve enables the lower side high pressure tank to be connected with the high pressure air source, the upper side high pressure tank is connected with the outlet air release pipe to the air-liquid separation tank through the high pressure air inlet pipe, and the purging direction is opposite to the purging process, namely: forming high-pressure high-speed degreasing water flow in the lower high-pressure tank, reversing a bell mouth of the lower high-pressure tank, forming an outer circular sleeve in a Y-shaped outlet pipe, forming a circumferential gap between a stainless steel pipe and the outer circular sleeve, forming a circular arc-shaped flow director, forming a stainless steel pipe, forming an inner circular pipe in the Y-shaped outlet pipe and a reversing bell mouth of the upper high-pressure tank, forming a high-pressure air inlet pipe at the top of the upper high-pressure tank, forming a second air source switching electromagnetic valve and forming a gas-liquid separation tank; time t1 is determined by the process test effect;
step seven, forward purging with high-pressure high-speed airflow: after t2, the first air source switching electromagnetic valve is switched in action, the high-pressure air source cuts off the passage flowing into the high-pressure tank, and the passage for only purging the stainless steel tube by the high-pressure air source is opened, and the main passage is the same as the forward purging passage of the high-pressure high-speed degreasing water flow, namely: the high-pressure high-speed air flow passes through the inner tube of the Y-shaped pipe outlet pipe, the stainless steel pipe, the circular arc-shaped flow guider, the circumferential gap between the stainless steel pipe and the outer circular sleeve, the outer tube of the Y-shaped outlet pipe, the inverted horn mouth of the right high-pressure tank, the lower high-pressure tank, the high-pressure air inlet tube at the top of the lower high-pressure tank, the second air source switching electromagnetic valve and the gas-liquid separation tank; time t2 is determined by the process test effect.
Compared with the prior art, the invention has the following beneficial effects:
the method adopts a method of sleeving a stainless steel pipe in the discharging process of the stainless steel pipe cold rolling process, and then discharging after purging the inside and the outside of the stainless steel pipe with high-pressure high-speed degreasing air flow, and the whole process also adopts a pneumatic mode suitable for cold rolling and degreasing processes, thereby facilitating the realization of automation of the pre-degreasing process.
Drawings
FIG. 1 is a schematic flow diagram of the method of the present invention;
FIG. 2 is a schematic top view of a cold rolled seamless stainless steel tube purge pre-degreasing apparatus of the present invention;
FIG. 3 is a schematic front view of a cold rolled seamless stainless steel tube purge pre-degreasing apparatus of the present invention;
fig. 4 is a schematic structural view of a stainless steel pipe lead-in and lead-out robot arm according to the present invention.
Fig. 5 is a schematic view of the pushing clamp of the present invention.
Fig. 6 is a schematic view of the structure of the clamping portion of the pushing clamp of the present invention.
Fig. 7 is a schematic view of a part of the structure of the high-pressure degreasing tank of the present invention.
In the figure: 1-1: an upper high-pressure tank; 1-2: a lower high pressure tank; 1-3: a gas-liquid separation tank; 1-4: a degreasing waste liquid recovery tank; 1-5: an inlet of a degreasing water preparation tank; 2-1: a liquid inlet electromagnetic valve; 2-2: a liquid outlet electromagnetic valve; 2-3: a first air source switching electromagnetic valve; 2-4: a second air source switching electromagnetic valve; 2-5: a high pressure gas source inlet pipe; 2-6: a degreasing water discharge pipe; 2-7: degreasing water in the high-pressure tank enters the pipe; 3: a multiple Y-shaped outlet tube; 3-1: a first Y-shaped pipe; 3-2: second Y-shaped pipe, 3-3: an inner tube; 3-4: an outer tube; 4: pushing the clamp; 4-1: a clamping part; 5: a roller; 6-1: the stainless steel tube is led into the mechanical arm; 6-2: a stainless steel pipe guiding mechanical arm; 7: a pneumatic motor; 8-1: a reel; 8-2 steel wire ropes; 9: an outer circular sleeve; 10: stainless steel tube; 11: a structural support; 12: the longitudinal center line of the stainless steel tube; 13: circular arc-shaped flow guider.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but the scope of the invention is not limited to these embodiments, and all changes and equivalents that do not depart from the spirit of the invention are intended to be included in the scope of the invention.
The stainless steel tube cold rolling pre-degreasing method is combined with a stainless steel tube cold rolling process, when the stainless steel tube is rolled into a finished product from an outlet of a stainless steel cold rolling mill, lubricating oil added in the rolling process is arranged inside and outside the finished product stainless steel tube, the lubricating oil is not convenient to transfer among different working procedures, oil stains are caused to affect the environment all over without treatment or improper treatment, and the degreasing effect of the degreasing working procedure can be improved by adopting the pre-degreasing method to remove the oil stains;
the stainless steel pipe pre-degreasing is completed during the rolling of a stainless steel pipe by a stainless steel cold rolling mill, and is different from a normal degreasing method, a rapid degreasing process is adopted, the rapid purging of the surfaces of the inner pipe and the outer pipe of the stainless steel pipe is mainly completed by adopting high-pressure high-speed degreasing water flow, and the rapid purging of the stainless steel pipe needs a closed environment.
The purging process can be repeatedly and reversibly performed, namely, the degreasing water flow forward purging can be performed from the stainless steel pipe first, and then the purging is performed through the gap between the outer side of the stainless steel pipe and the outer circular sleeve. The reverse purging of the degreasing water flow can be performed by first purging from the gap between the outer side of the stainless steel pipe and the outer circular sleeve and then purging from the inner side of the stainless steel pipe. After the degreasing water airflow is washed, high-pressure high-speed airflow can be adopted for purging, and the pre-degreasing method can solve the problem of discharging pollution of the cold-rolled finished tube and can also improve the effect of the follow-up degreasing process.
The high-pressure degreasing water tank is used for forming high-pressure high-speed degreasing water flow and switching between forward and reverse direction and high-pressure air source.
The stainless steel pipe 10 and the outer circular sleeve 9 are concentrically led in and sleeved together and led out through a stainless steel pipe leading-in mechanical arm, a stainless steel pipe leading-out mechanical arm, an outer circular sleeve guide system and a structural support;
the outer circle sleeve guiding system mainly comprises a drum 8-1 driven by a pneumatic motor 7, a steel wire rope drum 8-1 drives a steel wire rope 8-2 wound on the drum 8-1 to do circular motion, the steel wire rope 8-2 and the outer circle sleeve 9 are connected to form a ring shape, the steel wire rope drives the outer circle sleeve to guide a stainless steel pipe into the outer circle sleeve or guide the stainless steel pipe out of the outer circle sleeve, and the stainless steel pipe is inserted into a Y-shaped outlet pipe of a high-pressure degreasing water tank part;
the multi-Y-shaped outlet pipe is a switching port of a stainless steel pipe for the high-pressure and high-speed degreasing water flow in the forward and reverse directions and a high-pressure air source, and consists of two Y-shaped pipes (a first Y-shaped pipe 3-1 and a second Y-shaped pipe 3-2) and a concentric outlet pipe, wherein an inner pipe 3-3 of the concentric outlet pipe is connected with the stainless steel pipe, an outer pipe 3-4 is connected with an outer circular sleeve, and the two Y-shaped pipes of the multi-Y-shaped outlet pipe finish the forward and reverse washing direction of the degreasing water flow on the stainless steel pipe and the switching of the degreasing water flow and a single air flow in three different ways;
FIG. 2 is a schematic plan view of a stainless steel tube cold rolling pre-degreasing device,
the high-pressure degreasing water tank is partially arranged at one end of a purging central line, the outer circular sleeve guide system is positioned at the other end of the purging central line, the stainless steel pipe guiding-in mechanical arm 6-1 and the stainless steel pipe guiding-out mechanical arm 6-2 are arranged in the middle of the purging central line, the stainless steel pipe 10 is sleeved into the outer circular sleeve 9, and three different sections for switching and purging are performed.
The high-pressure degreasing water tank part generates degreasing water flow, finishes the purging switching of the degreasing water flow to the stainless steel pipe in the forward and backward washing direction, realizes the switching between the degreasing water flow and the single purging flow, and further comprises a pneumatic pushing clamp 4, wherein a slide way of the pneumatic pushing clamp is connected with the high-pressure degreasing water tank into a whole in order to accurately insert the inner pipe of the multi-Y-shaped outlet pipe into the finished stainless steel pipe;
the high-pressure degreasing water tank comprises an upper high-pressure tank 1-1 and a lower high-pressure tank 1-2 which are not communicated with each other, a gas-liquid separation tank 1-3, a degreasing waste liquid recovery tank 1-4, an upper high-pressure tank degreasing water inlet pipe connected with a liquid outlet of a liquid inlet electromagnetic valve 2-1, two high-pressure air source inlet pipes on the side surfaces of the upper high-pressure tank and the lower high-pressure tank which are respectively connected with two air outlets of a second air source switching electromagnetic valve, a degreasing water discharge pipe at the bottom of the lower high-pressure tank connected with a liquid outlet electromagnetic valve, a reverse horn mouth on the upper middle upper part of the upper high-pressure tank and the lower high-pressure tank, a multi-Y-shaped outlet pipe connected with the upper high-pressure tank and the lower high-pressure tank, and a pneumatic stainless steel pipe pushing clamp on the outlet side of the multi-Y-shaped pipe; the concentrated high-pressure air source is connected with the air inlet of the air source switching electromagnetic valve 1, and one air outlet of the air source switching electromagnetic valve 1 is connected with the air inlet of the air source switching electromagnetic valve 2. The high-pressure degreasing water tank part generates degreasing water flow, and finishes the purging switching of the degreasing water flow to the stainless steel tube in the forward and backward washing direction, and the switching between the degreasing water flow and the single purging flow.
The high-pressure degreasing water tank is divided into a degreasing waste liquid recovery tank, a lower high-pressure tank, an upper high-pressure tank and a gas-liquid separation tank from bottom to top, wherein the lower high-pressure tank, the upper high-pressure tank and the gas-liquid separation tank are placed on the same vertical central line, and the degreasing waste liquid recovery tank is a movable tank for facilitating centralized recovery treatment and periodical discharge of the degreasing waste liquid;
the inlet and outlet of the upper high-pressure tank 1-1 are three, one is the inlet 2-7 of degreasing water through the liquid inlet electromagnetic valve 2-1 positioned at the upper part of the side surface of the tank body, the second is the outlet which is positioned at the middle part of the side surface of the tank body and is connected with the inner pipe of the multi-Y-shaped outlet pipe, namely the inner pipe leading to the stainless steel pipe, the third is positioned at the upper part of the side surface of the tank body, the inlet is used as an inlet and the outlet, the function of the inlet is to connect the high-pressure air source through the air source switching electromagnetic valve 2-4, the outlet is used as an outlet, when the degreasing water reversely blasts into the stainless steel pipe 10 from the outside of the stainless steel pipe and the gap inside of the outer circular sleeve, the gas and part of degreasing water flow in the upper high-pressure tank 1-1 flows out from the third inlet and outlet, namely the high-pressure air source inlet pipe 2-5 to the gas-liquid separation tank 1-3 through the air source switching electromagnetic valve 2-4, because the high-pressure air flow cannot form circulation after entering the forward or reverse process, and only can begin to reversely blast after the forward blowing is completed, the high-pressure water is used in the upper and lower high-pressure air source circulation, and the high-pressure air flow cannot be discharged through the high-pressure air source circulation, and the high-pressure air source efficiency is needed to be comprehensively considered to be improved;
the lower high-pressure tank 1-2 is also provided with three inlets and outlets, the first is a degreasing water outlet which is positioned at the bottom of the tank body and passes through the liquid outlet electromagnetic valve, the second is an outlet which is positioned at the middle part of the side surface of the tank body and is connected with the outer pipe of the multi-Y-shaped outlet pipe, namely, the gap which is led to the outer side of the stainless steel pipe and the inner side of the outer circular sleeve, the third is positioned at the upper part of the side surface of the tank body and is used as an inlet and an outlet, the function of the inlet is that the high-pressure air source is connected into the air inlet through the air source switching electromagnetic valve 2, and the function of the outlet is that when the degreasing water in the lower high-pressure tank is positively purged from the stainless steel pipe to the outer side of the stainless steel pipe and the inner side of the outer circular sleeve, the gas and partial degreasing water flow out from the third inlet and the air source inlet pipe to the air-liquid separation tank through the air source switching electromagnetic valve 2;
the gas-liquid separation tank 1-3 is provided with an inlet pipe and two outlet pipes, wherein one inlet pipe is an outlet pipe connected with the second gas source switching electromagnetic valve 2-4, the inlet pipe is a gas flow with partial degreasing water from the upper side high pressure tank 1-1 or the lower side high pressure tank 1-2, the first outlet pipe is a gas outlet after the degreasing water and the gas are separated, the second outlet pipe is an outlet pipe of the degreasing water, and the degreasing water is added into a purge circulation through a liquid distribution part after being discharged until being discharged from the lower side high pressure tank 1-2 and then is comprehensively treated;
the stainless steel pipe is inserted into a multi-Y-shaped outlet pipe 3 of a high-pressure degreasing water tank, a pneumatic pushing clamp 4 is adopted, the pushing clamp 4 comprises a clamping trolley, a clamping part 4-1 is arranged on the clamping trolley, the stainless steel pipe is clamped in the clamping part, and the clamping part 4-1 is matched with the stainless steel pipe in shape.
The pushing slide way of the pushing clamp 4 is accurately aligned with the Y-shaped outlet pipe on the high-pressure degreasing water tank, the clamping of the pushing clamp 4 provides a guarantee for accurately inserting the inner pipe of the Y-shaped outlet pipe in the stainless steel pipe pushing process, and simultaneously the clamping of the pneumatic pushing clamp also provides a guarantee for accurately inserting the stainless steel pipe into the outer circular sleeve by the outer circular sleeve guide system, and simultaneously two guide arc rods which are arranged at two sides of a row of rollers 5 on the flushing central line and can be inserted and guaranteed; the pushing clamp accurately inserts the finished stainless steel pipe into the inner pipe of the Y-shaped outlet pipe, and the slideway of the pushing clamp is connected with the high-pressure degreasing water tank into a whole;
the stainless steel pipe leading-in mechanical arm 6-1 and the stainless steel pipe leading-out mechanical arm 6-2 are positioned at two sides of the purging central line, pneumatic devices which can adapt to the field environment are adopted for the stainless steel pipe leading-in mechanical arm and the stainless steel pipe leading-out mechanical arm, the stainless steel pipe leading-in mechanical arm adopts a general left-right swinging structure, but guide arc rods 11 which are arranged at two sides of a row of rollers of the purging central line ensure that the stainless steel pipe 10 can reliably fall into the purging central line;
the outer circle sleeve guiding system consists of a steel wire rope 8-2, a winding drum 8-1 for winding the steel wire rope, a pneumatic motor 7 coaxial with the winding drum of the steel wire rope, a guiding pulley, a row of rollers 5 and an outer circle sleeve 9 which are arranged on the upper and lower sides of the flushing central line, wherein the rollers 5 are oil-resistant plastic rollers. The steel wire rope 8-2 is wound on the steel wire rope reel 8-1 and then connected with a row of rollers 5 and an outer circular sleeve 9 through guide pulleys to form an outer circular sleeve guide system, one end of the steel wire rope is connected with the rear end of the outer circular sleeve, the other end of the steel wire rope 8-2 is connected with the pipe body of the middle front end of the outer circular sleeve, and a pushing and inserting space is reserved for the pneumatic pushing clamp 4 at the front end and the Y-shaped outlet pipe; when the stainless steel pipe is not led in and led out, the outer circular sleeve is positioned at the rear end of the flushing central line, a space is reserved for the introduction of the stainless steel pipe, after the stainless steel pipe is introduced in and when the pneumatic pushing clamp clamps the stainless steel pipe, the pneumatic motor drives the coaxial steel wire rope reel to rotate, the steel wire rope pulls the outer circular sleeve 9 to be sleeved into the stainless steel pipe 10 through the guide pulley and the row of rollers 5 until the outer circular sleeve 9 is inserted into the outer pipe of the multi-Y-shaped outlet pipe 3 to stop, and when the stainless steel pipe is flushed out, the pneumatic motor drives the coaxial steel wire rope reel 8-1 to reversely rotate and the steel wire rope pulls the outer circular sleeve to withdraw the stainless steel pipe 10;
FIG. 1 is a schematic diagram of the process flow of a cold rolling pre-degreasing method for stainless steel pipes,
the cold rolling and pre-degreasing process of the stainless steel tube is carried out immediately after the cold rolling process of the stainless steel tube is finished, the pre-degreasing process and the cold rolling process of the stainless steel tube are started and ended from one stainless steel tube, and the time of each stainless steel tube purging and pre-degreasing process is controlled within the time of rolling one stainless steel tube by a cold rolling mill;
when the pre-degreasing process detects that the cold rolling process of the stainless steel pipe is finished and the stainless steel pipe is placed on a cold rolling discharging station through a PLC system and a proximity switch, the stainless steel pipe guiding mechanical arm 6-1 is started to swing leftwards or rightwards to guide the finished stainless steel pipe to a flushing central line, a row of rollers 5 are arranged on the flushing central line, guiding arc rods are arranged on two sides of the rollers 5 to ensure that the stainless steel pipe 10 is accurately placed on the row of rollers 5,
the pneumatic stainless steel tube pushing clamp 4 is arranged near the Y-shaped outlet tube, after the stainless steel tube 10 is placed on the flushing central line, the pneumatic stainless steel tube pushing clamp 4 is started to clamp the stainless steel tube and then push the stainless steel tube forwards into an inner circular tube in the Y-shaped outlet tube which is also positioned on the flushing central line, and then the stainless steel tube pushing clamp releases the stainless steel tube, so that convenience is realized; when the stainless steel pipe pushing clamp 4 clamps the stainless steel pipe 10 to push forwards, the pneumatic motor 7 drives the steel wire rope drum 8-1 to rotate, the steel wire rope 8-2 drives the outer circular sleeve 9 at a second limiting position, namely, the rear end position of the purging central line, namely, the position of the outer circular sleeve when the outer circular sleeve is not sleeved into the stainless steel pipe, when the stainless steel pipe is placed at the purging central line and pushed forwards into an inner circular pipe in the multi-Y-shaped outlet pipe 3, the pneumatic motor drives the coaxial steel wire rope drum 8-1 to rotate, and the steel wire rope drives the outer circular sleeve 9 to penetrate into the stainless steel pipe placed on the purging central line from the pipe orifice side of the stainless steel pipe through the roller and moves forwards along the purging central line until the first limiting position is reached and the outer circular sleeve is inserted into an outer pipe in the multi-Y-shaped pipe outlet;
before the outer circular sleeve is sleeved into the stainless steel pipe, the liquid outlet of the liquid inlet electromagnetic valve is opened, the prepared degreasing water enters the upper high-pressure tank 1-1 from the liquid inlet pipe on the side, degreasing water is added once after the 1 st time and n or n times of the stainless steel pipe are purged, circulating degreasing water is adopted when the n or n times of the stainless steel pipe are purged, and the prepared degreasing water or the circulating degreasing water is added into the high-pressure degreasing water tank before each time of the stainless steel pipe is purged, and the process is completed by controlling the liquid inlet electromagnetic valve by the PLC system;
after the outer circular sleeve 9 and the stainless steel tube 10 are inserted into the outer tube in the outlet of the Y-shaped tube, the first air source switching electromagnetic valve 2-3 guides the high-pressure air source into the second air source switching electromagnetic valve 2-4, the air source switching electromagnetic valve 2 connects the high-pressure air source into the upper high-pressure tank and simultaneously connects the high-pressure air source inlet pipe of the lower high-pressure tank into the outlet air release pipe to the gas-liquid separation tank;
forward flushing of the high-pressure high-speed degreasing water flow: after entering the upper high-pressure tank 1-1, the high-pressure air source forcefully stirs the degreasing water in the tank and forms high-pressure high-speed degreasing water air flow, the high-pressure high-speed degreasing water flow enters the stainless steel pipe through a tank body inverted horn mouth and an inner circular pipe in a Y-shaped outlet pipe, the high-pressure high-speed degreasing water flow forcefully blasts the inner wall of the stainless steel pipe, the high-pressure high-speed degreasing water flow flows out of the stainless steel pipe through a circular arc-shaped deflector 13, enters a circumferential gap between the stainless steel pipe and an outer circular sleeve and blasts the outer wall of the stainless steel pipe forwards, enters the lower high-pressure tank 1-2 through the outer circular sleeve in the Y-shaped outlet pipe and the inverted horn mouth, and the high-pressure air flows along with a small amount of degreasing water to the gas-liquid separation tank 1-3 through a high-pressure air inlet pipe on the side surface of the lower high-pressure tank 1-2 and an air source switching electromagnetic valve 2-4 outlet air release pipe, and most degreasing water stays in the lower high-pressure tank 1-2;
high-pressure high-speed degreasing water flow reverse flushing: the second air source switching electromagnetic valve 2-4 is switched in action, the second air source switching electromagnetic valve 2-4 is used for connecting the lower high-pressure tank into the high-pressure air source, the upper high-pressure tank 1-1 is connected into the outlet air release pipe to the air-liquid separation tank 1-3 through the high-pressure air inlet pipe, and the purging direction is just opposite to the purging process, namely: forming high-pressure high-speed degreasing water airflow in the lower high-pressure tank 1-2, reversing a bell mouth of the lower high-pressure tank, forming an outer circular sleeve in a Y-shaped outlet pipe, forming a circumferential gap between a stainless steel pipe and the outer circular sleeve, forming an arc-shaped deflector, forming an inner circular pipe in the stainless steel pipe, reversing the bell mouth of the upper high-pressure tank, forming a high-pressure air inlet pipe at the top of the upper high-pressure tank, forming a second air source switching electromagnetic valve 2-4, and forming a gas-liquid separation tank;
forward flushing with high pressure and high velocity air flow: the first air source switching electromagnetic valve 2-3 is switched in action, the high-pressure air source cuts off the passage flowing into the high-pressure tank, and the passage for flushing the stainless steel pipe by the high-pressure air source is opened, and the main passage is the same as the forward flushing path of the high-pressure high-speed degreasing water flow.
The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The cold rolling seamless stainless steel tube purging pre-degreasing device is characterized by comprising a structural support arranged on a purging central line, wherein a high-pressure degreasing water tank part, a stainless steel tube leading-in mechanical arm, a stainless steel tube leading-out mechanical arm, a pushing clamp, an outer circular sleeve and an outer circular sleeve guide system are arranged on the structural support; the high-pressure degreasing water tank part is positioned at one end of the purging central line, the outer circular sleeve guide system is positioned at the other end of the purging central line, and a stainless steel pipe guiding-in mechanical arm, a stainless steel pipe guiding-out mechanical arm and a pushing clamp are arranged on a structural support between the high-pressure degreasing water tank part and the outer circular sleeve guide system; the stainless steel pipe guiding-in mechanical arm and the stainless steel pipe guiding-out mechanical arm are respectively arranged at two sides of the pushing clamp, the pushing clamp is arranged at one side of the high-pressure degreasing water tank, the center of the pushing clamp is provided with a clamping part, the center line of a clamping opening of the clamping part is arranged on the flushing center line, and the stainless steel pipe is movably clamped in the clamping part;
the outer circle sleeve guiding system comprises a steel wire rope winding drum arranged on a structural support of the purging central line, a pneumatic motor, a guide pulley, a row of rollers and an outer circle sleeve, wherein the pneumatic motor, the guide pulley, the row of rollers and the outer circle sleeve are coaxially connected with the steel wire rope winding drum, the steel wire rope is wound on the steel wire rope winding drum, is connected with the outer circle sleeve through the guide pulley and the row of rollers, one end of the steel wire rope is connected with the rear end of the outer circle sleeve, and the other end of the steel wire rope is connected with a tube body of the middle of the outer circle sleeve, which is close to the front end.
2. The cold-rolled seamless stainless steel tube purging pre-degreasing device according to claim 1, wherein the high-pressure degreasing water tank part comprises a multi-Y-shaped outlet pipe and a degreasing waste liquid recovery tank, a lower high-pressure tank, an upper high-pressure tank and a gas-liquid separation tank which are arranged from bottom to top, wherein the lower high-pressure tank, the upper high-pressure tank and the gas-liquid separation tank are arranged on the same vertical central line, and the degreasing waste liquid recovery tank is movable;
the upper high-pressure tank comprises three inlets and outlets, wherein the first inlet and outlet is arranged at the upper part of the side surface of the tank body, the degreasing water preparation tank is connected through a degreasing water inlet pipe, the second inlet and outlet is arranged at the side surface of the tank body, a plurality of Y-shaped outlet pipes are connected, and the third inlet and outlet is connected with a high-pressure air source inlet pipe;
the lower high-pressure tank comprises three inlets and outlets, wherein the first inlet and outlet is arranged at the bottom of the tank and is connected with the degreasing waste liquid recovery tank through a degreasing water discharge pipe, the second inlet and outlet is arranged at the side surface of the tank body, the second inlet and outlet is connected with a Y-shaped outlet pipe, the third inlet and outlet is arranged at the upper part of the side surface of the tank body and is connected with a high-pressure air source inlet pipe;
the high-pressure air source inlet pipe is connected with a high-pressure air source, a first air source switching electromagnetic valve and a second air source switching electromagnetic valve are arranged on the high-pressure air source inlet pipe, outlets of the first air source switching electromagnetic valve are respectively connected with a Y-shaped outlet pipe and the second air source switching electromagnetic valve, the second air source switching electromagnetic valve comprises an inlet, an outlet and two inlets and outlets, the inlet of the second air source switching electromagnetic valve is connected with the outlet of the first air source switching electromagnetic valve, the outlet of the second air source switching electromagnetic valve is connected with the air-liquid separation tank, and the two inlets and outlets of the second air source switching electromagnetic valve are respectively connected with a third inlet and outlet of the upper high-pressure tank and a third inlet and outlet of the lower high-pressure tank.
3. The cold-rolled seamless stainless steel tube purging pre-degreasing device according to claim 2, wherein the multi-Y-shaped outlet tube comprises a first Y-shaped tube, a second Y-shaped tube and a concentric outlet tube, inlet calibers of the first Y-shaped tube and the second Y-shaped tube are both larger than the outlet calibers, the inlets are bell mouths, the inlet of the first Y-shaped tube is connected with a second inlet and outlet of the upper high-pressure tank, and the inlet tube of the second Y-shaped tube is connected with a second inlet and outlet of the lower high-pressure tank; the inlet of the first Y-shaped pipe is also connected with the outlet of the first air source switching electromagnetic valve;
the concentric outlet pipe comprises an inner pipe and an outer pipe which are concentric and are not communicated with each other in the Y-shaped outlet pipe, and a circumferential gap is reserved between the inner pipe and the outer pipe; the inlet of the inner tube is connected with a first Y-shaped tube, and the shape and the size of the outlet of the inner tube are matched with those of the stainless steel tube, so that the stainless steel tube is tightly inserted into the outlet of the inner tube; the inlet of the outer tube is connected with a second Y-shaped tube, and the outlet of the outer tube is connected with an outer circular sleeve; the central axes of the concentric inner tube and outer tube are on the purge centerline; the outlet of the concentric outlet pipe is opposite to the upper opening clamping opening of the pushing clamp.
4. The cold-rolled seamless stainless steel tube purging pre-degreasing device according to claim 1, wherein the stainless steel tube guiding-in mechanical arm and the stainless steel tube guiding-out mechanical arm are mechanical arms swinging leftwards and rightwards and are positioned at the middle part of the stainless steel tube, the guiding-in end point of the stainless steel tube guiding-out mechanical arm, the guiding-out starting point of the stainless steel tube guiding-out mechanical arm, the axial center line of the stainless steel tube and the purging center line are coincident or on the same straight line, a row of rollers are arranged below the stainless steel tube with the purging center line, and guiding arc rods are further arranged on two sides of the rollers.
5. The device for purging and pre-degreasing the cold-rolled seamless stainless steel tube according to claim 1, wherein the outer circular sleeve is arranged above a row of rollers, a steel wire rope drum is arranged below the outer circular sleeve, the steel wire rope drum and a rotating shaft are connected with a pneumatic motor, and steel wire ropes are wound on the steel wire rope drum for a plurality of circles;
the outer circular sleeve is characterized in that one end of the outer circular sleeve is closed, an arc-shaped flow director is arranged in the closed end, the arc-shaped flow director comprises a semicircular ball sleeved at the maximum position of the closed end of the outer circular sleeve and a flow guiding rod connected with the center of the bottom of the semicircular ball, the top of the flow guiding rod is a tip, a clockwise or anticlockwise spiral flow guiding sheet is arranged at the bottom of the inner wall of the outer circular sleeve from the tip, and the rear part of the tip is connected with the bottom of the semicircular ball through a flow guiding hose.
6. The cold-rolled seamless stainless steel tube purging pre-degreasing device according to claim 1, wherein the diameter of the outer circular sleeve is more than 1.5 times of that of the stainless steel tube, and the outer circular sleeve is more than 50mm longer than that of the stainless steel tube.
7. The method is characterized in that the stainless steel tube is placed into an outer circular sleeve which is larger than the stainless steel tube by more than 1.5 times and has one closed end, a guide rod is added in the outer circular sleeve, high-pressure and high-speed degreasing water flow positively blasts the seamless stainless steel tube from one end of the inner side of the seamless stainless steel tube, and the degreasing water flow blasts out from a gap between the seamless stainless steel tube and the outer circular sleeve after reaching the other end of the seamless stainless steel tube; after t time, the degreasing water gas flow with high pressure and high speed is purged from one end of the gap between the seamless stainless steel tube and the outer circular sleeve tube in a reverse direction until the other end of the gap is purged from the seamless stainless steel tube, and after n times of purging of the degreasing water gas flow with positive and negative directions, the degreasing water gas flow is purged through the cleaning of the high pressure and high speed gas flow.
8. The method for purging and pre-degreasing the cold-rolled seamless stainless steel tube according to claim 7, wherein the method specifically comprises the following steps:
step one, after a stainless steel pipe is separated from an outlet of a stainless steel cold rolling mill, a stainless steel pipe guiding mechanical arm swings leftwards or rightwards, the stainless steel pipe is guided to a row of rollers on a flushing central line, a pushing clamp clamps the stainless steel pipe and pushes the stainless steel pipe forwards into an inner pipe in a multi-Y-shaped outlet pipe, and then the stainless steel pipe pushing clamp loosens the stainless steel pipe;
step two, after the pushing clamp clamps the stainless steel tube, the pneumatic motor drives the coaxial steel wire rope reel to rotate, the steel wire rope drives the outer circular sleeve through the guide pulley, the stainless steel tube penetrates into the steel wire rope reel and moves forwards along the flushing center line until the outer circular sleeve is inserted into the outer tube in the outlet of the Y-shaped tube;
step three, before the outer circular sleeve sleeves the stainless steel tube into the tube, the liquid outlet of the liquid inlet electromagnetic valve is opened, degreasing water is prepared and enters the upper high-pressure tank from the liquid inlet tube on the side, degreasing water is added once after n stainless steel tubes are purged, and n is determined by a process test;
step four, after the outer circular sleeve and the stainless steel tube are inserted into the outer tube in the outlet of the Y-shaped tube, the first air source switching electromagnetic valve guides the high-pressure air source into the first air source switching electromagnetic valve, the first air source switching electromagnetic valve connects the high-pressure air source into the upper high-pressure tank, and simultaneously, the high-pressure air source inlet pipe of the lower high-pressure tank is connected into the outlet air release pipe to the gas-liquid separation tank;
step five, forward purging of high-pressure high-speed degreasing water gas flow: after the high-pressure air source enters the upper high-pressure tank, the degreasing water in the tank is strongly stirred to form high-pressure high-speed degreasing water air flow, the degreasing water flow enters the stainless steel pipe through the inner pipe in the multi-Y-shaped outlet pipe connected with the tank body of the upper high-pressure tank, and the high-pressure high-speed degreasing water flow forms strong purging on the inner wall of the stainless steel pipe; after the high-pressure high-speed degreasing water gas flows out of the stainless steel pipe through the circular arc-shaped flow guide, the degreasing water gas enters a circumferential gap between the stainless steel pipe and the outer circular sleeve, the outer wall of the stainless steel pipe is blasted forwards, then the degreasing water gas enters a lower high-pressure tank through an outer pipe of a multi-Y-shaped outlet pipe, the high-pressure gas is switched to a gas-liquid separation tank along with a small amount of degreasing water through a high-pressure gas inlet pipe and a second gas source on the side surface of the lower high-pressure tank, and most of degreasing water is left in the lower high-pressure tank;
step six, reversely purging the high-pressure high-speed degreasing water flow: after t1 time, the action of the second air source switching electromagnetic valve is switched, the second air source switching electromagnetic valve enables the lower side high pressure tank to be connected with the high pressure air source, the upper side high pressure tank is connected with the outlet air release pipe to the air-liquid separation tank through the high pressure air inlet pipe, and the purging direction is opposite to the purging process, namely: forming high-pressure high-speed degreasing water flow in the lower high-pressure tank, reversing a bell mouth of the lower high-pressure tank, forming an outer circular sleeve in a Y-shaped outlet pipe, forming a circumferential gap between a stainless steel pipe and the outer circular sleeve, forming a circular arc-shaped flow director, forming a stainless steel pipe, forming an inner circular pipe in the Y-shaped outlet pipe and a reversing bell mouth of the upper high-pressure tank, forming a high-pressure air inlet pipe at the top of the upper high-pressure tank, forming a second air source switching electromagnetic valve and forming a gas-liquid separation tank;
step seven, forward purging with high-pressure high-speed airflow: after t2, the action of the first air source switching electromagnetic valve is switched, the high-pressure air source cuts off a passage flowing into the high-pressure tank, and a passage for flushing the stainless steel pipe only by the high-pressure air source is opened: the high-pressure high-speed air flow passes through an inner pipe in an outlet pipe of the Y-shaped pipe, a stainless steel pipe, an arc-shaped flow guider, a circumferential gap between the stainless steel pipe and an outer circular sleeve, an outer pipe in the Y-shaped outlet pipe, a lower high-pressure tank, a high-pressure air inlet pipe at the top of the lower high-pressure tank, a second air source switching electromagnetic valve and a gas-liquid separation tank.
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