CN87101426A - Blasting processing unit for internal surface of pipe - Google Patents
Blasting processing unit for internal surface of pipe Download PDFInfo
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- CN87101426A CN87101426A CN87101426.2A CN87101426A CN87101426A CN 87101426 A CN87101426 A CN 87101426A CN 87101426 A CN87101426 A CN 87101426A CN 87101426 A CN87101426 A CN 87101426A
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- pipe
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- abrasive
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Abstract
Blasting processing unit for internal surface of pipe.It is provided with and makes injection program is the device of automatic program control, amount of abrasive automatic weighing device, the dress abrasive material bin level indicator and the vent valve of container.Nozzle adopts artificial diamond's stone material.When using this invention equipment blasting treatment, the pressure that makes sand valve top is greater than bottom, adopt the low transition conduit of convenient installed cost, processed pipe only needs directly to insert or extract out when loading and unloading, and this invention equipment adopts a plurality of nozzles, once can handle the number arm, use this invention equipment can handle inner surface dimensional tolerance and the very tight elongated tubular of cylindrical form tolerance.
Description
The invention belongs to the equipment that blasting treatment is used.Promptly abrasive material is sneaked in the air stream of band pressure, be ejected into then on the work piece inner surface to be processed, to reach the purpose of removing the specific thickness layer by means of some containers, pipeline, valve, nozzle etc.
About the blasting processing unit and the method for internal surface of pipe, state-of-the art and form thereof have nothing in common with each other.For example, DRP DE 3232994 is a kind of sand blasting units, and it uses air as carrying object, both can do spray, can carry out wet shot again; U.S. Pat 3914815 is pipe internal surface cleaning plants, and it uses abrasive slurries shot blastinog pipe internal surface, and abrasive slurries is promoted by custom-designed mechanism gas supplied, thereby fluctuation pressure is passed to nozzle; The clear 60-263671 of Japan Patent is the blasting method of internal surface of pipe, and the suction that is produced by means of air suction device by an end of purge tube makes abrasive material and air together from the other end ejection of pipe, thus grinding internal surface of pipe.
But, the equipment of existing internal surface of pipe blasting treatment and method, they all only are for the dirt of removing pipe internal surface, oxide skin, rusty stain etc.As long as these removals, the bright purpose that just reached is beaten in polishing in the pipe, what of tube wall thickness when handling, and the size requirements of handling pipe internal surface middle part, back and two ends aperture difference is not very tight.Interior high-precision dimensional tolerance of pipe and cylindrical form tolerance when in other words, current these blasting processing units and method all are difficult to guarantee the sandblast grinding.
Some tubing to blasting treatment after inner surface dimensional tolerance and cylindrical form tolerance very tight.Slender tube material particularly when handling this tubing, to the specification requirement of such strictness, existing abrasive blast equipment and method then are difficult to satisfy.For example, be used for the Zr-4 compo pipe of atomic reactor, its dimensioning modest ability is 3200～3700mm, internal diameter ∮ 8.6mm.The attenuate amount of requirement tube wall must be greater than 3～5 μ m during its inner surface of blasting treatment, and the cylindricity tolerance recruitment of bore mustn't be greater than 3 μ m.The equipment that the object of the present invention is to provide a kind of internal surface of pipe blasting treatment that can satisfy high precision size tolerance and cylindrical form tolerance to use.
In the process with abrasive material or sand cleaning pipeline, always there is one to supply with correct amount of abrasive and enter in the air-flow and guarantee that this sand flow enters the problem that the pipeline cleared up steadily sprays.Injecting time, the size of sand amount and uniformity, parameters such as pressure and nozzle diameter are the key factors that influences jet quality.Present device is intended to strict these factors of control.
Fig. 1 is the schematic diagram of present device.
Fig. 2 is transition conduit 13 and the jack connection composition that connected with equipment by purge tube 14 among Fig. 1.
The parts that present device comprises and its effect and getting in touch between them are as described below:
As can be seen from Figure 1, present device comprises pressure vessel 1, and its diameter is ∮ 350～400mm, the abrasive material that the dress sandblast is used, and a conical top cover 2 is arranged at its top.Container 1 upper end one side is equipped with admission line 40, and the open and close valve 3 and the pressure regulator valve 4 of Pressure gauge 18, air inlet arranged on the pipeline 40, and valve 3 is a solenoid electric valve.Container 1 upper end opposite side is equipped with vent valve 5, and this valve is adopted to allow to contain solenoid electric valve or the custom-designed valve that grey visceral-qi is passed through by electrical control.The abrasive material bin level indicator 6 that an oblique cutting is arranged on container 1 sidewall.Container 1 bottom is conical, and sand valve 7, this valve are arranged at its bottom is a pneumatic operated valve, and its function not only can the break-make sand flow, also can control the size of sand flow amount simultaneously.The bottom of valve 7 is mixing chambers 8, and the right of mixing chamber 8 is an admission line 50 among Fig. 1, and electromagnetic opening and closing valve 9, gas tank 10 are arranged on the pipeline 50, and its volume is 0.2～0.5m
2, also have pressure regulator valve 11 in addition.Pipeline 40 is communicated with pipeline 50 and connects source of the gas 60 through air cleaner 21.The left side outlet of mixing chamber connects nozzle 12, and the left side of nozzle is a transition conduit 13, and the abrasive material that is sprayed by nozzle enters by purge tube 14 through transition conduit 13.The outlet of processed pipe 14 and rotoclone collector 15 link, and the dust-precipitator diameter is 300mm.The lower part outlet of dust-precipitator 15 connects the pocket 16 of receiving the dress abrasive material.The bottom of pocket 16 is weight sensors 17, and pocket 16 and weight sensor 17 are loaded in the container 37, the contaminated air in the air in order to avoid dust wafts.The top outlet of dust-precipitator 15 links with the bagroom 22 of band draft, and its inflow-rate of water turbine is 500～2000m
3/ min.
The abrasive material that uses among the present invention is the carbonization silica sand, selects the granularity of sand according to the specification requirement of processing pipe.Use the method for present device purge tube inner surface to comprise following program:
At first, pressure regulator valve 4,11 is transferred to suitable pressure (3～6kg/cm
2), its numerical value is reacted to respectively on the Pressure gauge 18,19, and the force value that makes table 18 is a little more than 19 numerical value.Behind the pressure setting of pressure regulator valve, connect the pressure (5～8kg/cm of source of the gas 60
2), this moment, remaining valve all was in closed condition except that pressure regulator valve.
Secondly, the pipe 14 that will handle is connected between transition conduit 13 and the dust-precipitator 15.
Once more, enter injection program, the switching of valve is in proper order: open valve 3 earlier, make container 1 pressurising, open valve 9 after the several seconds, after the several seconds, open valve 7, enter injection phase this moment, after reaching the injecting time of appointment, shut off valve 3 is opened valve 5 venting simultaneously, pressure begins to descend in the container 1, pressure is by table 18 reaction, and valve 5, valve 7 are closed after the several seconds, and final valve 9 is also closed.So far, finish inject process one time.
At last, the pipe that inject process is crossed is once reversed end for end, and an end that is about to originally connect with transition conduit 13 connects with dust-precipitator 15, and an end that originally connects with dust-precipitator 15 is connected with transition conduit 13, spray once again after the pipe tune connects, promptly clear up a pipe inspection secondary.
If when inject process, to doing suitably to regulate, can once finish inject process by the sand amount in the pipe, tolerance and injecting time, promptly secondary injection can carry out.But for guaranteeing high-precision dimensional tolerance and cylindrical form tolerance more reliably, still with tune spray for well.
The first step of this injection method is just just carried out when beginning to spray first arm at every turn, and in addition, other steps that only repeat this method in shot blastinog get final product.
Present device is provided with and makes injection program is the device of automatic program control.Because the pipe internal surface quality requirement of this equipment institute inject process is very tight, therefore this equipment is turned round under steady state, could guarantee the repeatability of jet quality.So, pressure regulator valve 4 and 11 the switching and the quilt loading and unloading of pipe in equipment of clearing up, electric automatic program control is all adopted in the running of the miscellaneous part of this equipment to the inner surface that uses present device and method purge tube in its injection program and the course of injection except inject process operation beginning or when finishing.The automatic program control device is located on the operation board of the whole invention equipment of control, as long as the operator clicks " spraying " button on the operation board, then whole injection program is carried out automatically.Each valve realizes that by the time program automatic shutter finishes until sandblast.Injection program medium sand valve 7 opens to intake valve 3 and cuts out during this period of time and to be the actual sandblast time, it is to be controlled by the high-precision crystal pipe time relay, can adjust in the scope at 0～60 second, the maximum delay time error that repeats was less than 1.8 seconds, accurately control injecting time by it just, the sandblast time that guarantees every arm reliably is identical, make operation become very simple, eliminated objective human factor, to the uniform and stable control action that plays of sand flow, thus the strict demand when satisfying tubing particularly internal surface of elongated tube being handled.
Present device is provided with the amount of abrasive automatic weighing device.Abrasive material by every arm ejection is fallen on the weight sensor 17, and after each injection finished, the amount of abrasive on the weight sensor showed automatically on weight display 24 by cable 23 and prints.Some pipe inner surface physical dimension after inject process requires very tight, every arm all will be measured its internal diameter size after processing, particularly quite bothering concerning those elongated tubulars, generally be to carry out longhole survey by air-gauge, and the measuring time is often also long than injecting time.Because when other nozzle parameters are identical, stock removal is relevant with each amount of abrasive of spraying, promptly for same tubing, amount of abrasive is certain, stock removal is identical, pipe internal diameter equates after the grinding, so, in inject process, can adopt the each amount of abrasive of amount of abrasive automatic weighing device monitoring by spraying in the pipe.If there is fault to take place just can in time find from the amount of abrasive that display reacts.Therefore, so not only improve the reliability of inject process, can guarantee the jet quality of every arm, and remove from and use air-gauge detector tube inner surface, thereby save the plenty of time.
Because pressure vessel 1 is closed container, can monitor out for making the operator that amount of abrasive is provided with bin level indicator in the container.Indicator be used for when blasting treatment to amount of abrasive what, have or not and indicate.The rapier 25 of indicator 6 is contained in the pressure vessel 1, be preferably 30 ° with the angle of container 1 axis, it is actually the metal cylinder of one two coaxial mutual insulating, middle at interval with non-conductive medium, constitute a capacitor, the degree of depth that buries electrode when abrasive material has just changed the size of rapier capacitance not simultaneously, thereby makes instrument in the controller 27 correspondingly indicate what of abrasive material by cable 26.When abrasive material exposed rapier fully, controller 27 sent alarm signal, and buzzer rings, and indicator lamp is bright, thereby reminded the operator to add abrasive material, avoided not having the abrasive material operation, improved the reliability of injection work.
The material of nozzle 12 of the present invention adopts diamond, and its aperture is different with the size in the aperture of processed pipe, for example can adopt ∮ 2.0～7.0mm.Adopt artificial diamond's masonry nozzle, nozzle diameter is difficult for changing in the use, thereby guaranteed that jet quality is stable, though it is than the tungsten carbide price height of common employing, but because the service life of diamond nozzle is considerably beyond tungsten carbide, so it also is the material of cost efficient.
Pipeline 40 is equipped with pressure regulator valve 4 and 11 respectively with pipeline 50.Pipeline 40 can be adjusted by valve 4 and valve 11 with the pressure of pipeline 50.The pressure of pipeline 40 is the pressure of pressure vessel, and by Pressure gauge 18 indications, the pressure of pipeline 50 is main gas circuit pressure, by Pressure gauge 19 indications.Be provided with pressure regulator valve 4 and 11 except make each ducted pressure weighing apparatus fixed, also sand valve 7 up and down between build-up of pressure poor, promptly top pressure is slightly larger than the (0.3～1.5kg/cm of bottom
2).Thereby making the abrasive material that enters mixing chamber 8 in the container 1 is not only by gravity, and is by means of pressure differential.Like this, the blanking in smaller of the aperture of valve 7 can not blocked yet, and in addition, the flow adjustment range of abrasive material is increased, and uses more flexible, convenient.Using pressure regulator valve in the U.S. Pat 4048757 is for the pressure in balance sandbox and the gas sand flow, and the purpose that the present invention uses pressure regulator valve exactly in contrast, the build-up of pressure difference to regulate the sand amount and controls the influence that whole system is not subjected to the bleed pressure variation.
The present invention has adopted transition conduit.Transition conduit adopts hard or high-abrasive material to be advisable, converted steel for example, its internal diameter is identical or more smaller with the internal diameter of processed pipe, length is 200～600mm, wall thickness by 5～10 times of processing pipe.Use transition conduit to avoid processed pipe internal surface to cause horn mouth.Thereby help to guarantee the strict demand of its dimensional tolerance and cylindrical form tolerance.Among Fig. 1 transition conduit 13 with realized that by connecting of purge tube 14 and nozzle 12 referring to Fig. 2, coupling mechanism 35 comprises clamp nut 28, pressure ring 29, O RunddichtringO 30 by coupling mechanism 35.Adopt spiral marking connection between clamp nut 28 and supporter 31 or the supporter 32.When needs loading and unloading or replacing transition conduit 13, as long as unscrew clamp nut, transition conduit to be inserted or extracted out, after the insertion transition conduit, it is promptly salable to tighten clamp nut again.Japan Patent has also adopted transition conduit among the clear 60-263671, this patent is referred to as " false tube ".In the Japan Patent, all used false tube, and the present invention only need handle pipe near nozzle one end installation transition conduit at the two ends of processing pipe, in addition, false tube itself band sealing device in the Japan Patent, and transition conduit only is a straight tube among the present invention, convenient installed and cost are low.
Be by coupling mechanism 36 by purge tube 14 with connecting of transition conduit 13 and rotoclone collector 15 among Fig. 1.As seen from Figure 2, it comprises clamp nut 33, and skeleton U RunddichtringO 34 also has supporter 31 in addition.Still adopt spiral marking connection between clamp nut 33 and the supporter 31.Out-of-date when air communication, the gas that enters in the skeleton U RunddichtringO 34 that elastomeric material makes makes sealing ring 34 and is produced sealing by purge tube 14.This coupling mechanism is being had by the two ends of purge tube 14.When the pipe of being cleared up loads and unloads in the inject process process, only need directly to insert or extract out, do not need to turn clamp nut.
On the mixing chamber 8 of blasting processing unit of the present invention several nozzles can be installed side by side, therefore, use present device and method once can several arms of while inject process.Two arms for example once capable of simultaneous injection.
Point out that in addition present device is provided with pressure monitoring and alarm device.When bleed pressure was lower than a certain numerical value, the electro connecting pressure gauge energising rang electric bell, and indicator lamp is bright, to cause operator's attention.
The conical top cover 2 of present device pressure vessel 1, its underpart the inside have spring, when it can being depressed during no pressure in the container 1, abrasive material are packed in the container 1 by top cover 2, when container 1 back header 2 that pressurizes can seal voluntarily.
In present device, adopted dual dust arrester installation, therefore atmospheric dust pollution is minimum, can be well below the setting 2mg/m of the 32nd of the TJ36-79 " Design of Industrial Enterprises sanitary standard " of departments such as Ministry of Health of the People's Republic of China approval promulgation
3
The present invention compares the ejection efficiency height with the wet shot that with compressed air is power.For example, wet-spray technique sprayed an arm in the past often needs several minutes, and the wall thickness reduction amount is minimum, and the present invention handles internal diameter ∮ 8.6, and it is 20～65 seconds that the Zr-4 compo pipe of long 3200～3700mm sprays a time, comprises that the loading and unloading pipe is 40 seconds～1 minute and 30 seconds.This pipe tube wall thickness after twice injection is 3～10 μ m, and inner surface cylindricity tolerance increment is 1～3 μ m.
Embodiment.Use this invention equipment and method that the Zr-4 compo pipe of internal diameter ∮ 8.6mm has been carried out blasting treatment.Abrasive material adopts the carbonization silica sand, and nozzle material adopts diamond, and has adopted the steel transition conduit.The length of Zr-4 compo pipe is 3200mm in the example 1, is 3400mm in the example 2, lists in table 1 for the relevant parameter of other inject process of 3200mm in the example 3.Inject process adopts automatic program control, lists in table 2 with the injection front and back bore size numerical value that air-gauge is measured.After the processing not only pipe internal surface roughness quality improve, and can satisfy the requirement of internal surface of elongated tube high precision size tolerance and cylindrical form tolerance as can be seen from Table 2 fully.
Table 1, Zr-4 compo pipe inject process have related parameter
* adopt secondary injection, sprayed 30 seconds at every turn.
* adopts once and sprays.
Internal diameter size before and after table 2, Zr-4 compo pipe spray
* testing 3 is shot blastinog two arms.
Claims (9)
1, the equipment used of a kind of internal surface of pipe blasting treatment, comprise pressure vessel 1, sand valve 7, gas sand mixing chamber 8, the nozzle 12 that holds abrasive material and use, pocket 16, the pipeline 40 and 50 of receiving the dress abrasive material, it is characterized in that being provided with that to make injection program be the device of automatic program control, accurately control injecting time, guarantee that every arm injecting time equates.
2, according to the said blasting processing unit of claim 1, it is characterized in that being provided with the amount of abrasive automatic weighing device, each passing through in the monitoring inject process by the amount of abrasive of jet pipe.
3,, it is characterized in that adorning in the pressure vessel 1 that abrasive material uses and be provided with bin level indicator 6, indication amount of abrasive when inject process according to the said blasting processing unit of claim 1.
4,, it is characterized in that nozzle adopts artificial diamond's stone material according to the said blasting processing unit of claim 1.
5, according to the said blasting processing unit of claim 1, it is characterized in that adorning the pressure vessel 1 that abrasive material uses and be provided with vent valve 5, every injection once, pressure vessel needs remove pressure by this valve venting.
6, according to the said blasting processing unit of claim 1, it is characterized in that admission line 40 and 50 is respectively equipped with pressure regulator valve 4 and 11, to adjust pipeline 40 and 50 pressure and make at the build-up of pressure up and down of sand valve 7 poorly, top pressure is greater than (0.3～the 1.5kg/cm of bottom
2).
7, according to the said blasting processing unit of claim 1, it is characterized in that the transition conduit that adopts only is easy to loading and unloading and a straight tube that cost is low in its two ends coupling mechanism, the coupling mechanism of transition conduit by its two ends links with nozzle and processed pipe respectively.
8, according to the noisy treatment facility of the said spray of claim 1.When it is characterized in that in the inject process process, being loaded and unloaded, only need in the coupling mechanism at its two ends, directly insert or extraction by the pipe of blasting treatment.
9,, it is characterized in that on the mixing chamber 8 an amperage nozzle side by side, once several arms of blasting treatment simultaneously according to the said blasting processing unit of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101426 CN1006868B (en) | 1987-11-21 | 1987-11-21 | Blasting processing unit for internal surface of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87101426 CN1006868B (en) | 1987-11-21 | 1987-11-21 | Blasting processing unit for internal surface of pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87101426A true CN87101426A (en) | 1988-07-27 |
| CN1006868B CN1006868B (en) | 1990-02-21 |
Family
ID=4813415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101426 Expired CN1006868B (en) | 1987-11-21 | 1987-11-21 | Blasting processing unit for internal surface of pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1006868B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567879A (en) * | 2013-11-06 | 2014-02-12 | 山东开泰工业科技有限公司 | Multi-station rotary feeding sand blasting machine |
| CN103567876A (en) * | 2012-07-25 | 2014-02-12 | 上海图博可特石油管道涂层有限公司 | High-pressure water sandblasting device for both inner surface and outer surface of steel pipe |
| CN104015130A (en) * | 2013-02-28 | 2014-09-03 | 天源环保有限公司 | Pipeline internal polishing process and device |
| CN104742027A (en) * | 2010-07-27 | 2015-07-01 | 新东工业株式会社 | Method for shot-peening and a shot-peening machine |
| CN105333919A (en) * | 2015-12-08 | 2016-02-17 | 大连华锐重工集团股份有限公司 | Steel chisel inclined inserting type heavy material level meter of industrial furnace |
| CN112171522A (en) * | 2020-09-09 | 2021-01-05 | 张翼翔 | Mechanical part surface sand blasting device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5217132B2 (en) * | 2006-09-01 | 2013-06-19 | 新日鐵住金株式会社 | Steel pipe inner surface blasting apparatus, steel pipe inner surface blasting method, and method of manufacturing steel pipe with excellent inner surface properties |
-
1987
- 1987-11-21 CN CN 87101426 patent/CN1006868B/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104742027A (en) * | 2010-07-27 | 2015-07-01 | 新东工业株式会社 | Method for shot-peening and a shot-peening machine |
| CN104742027B (en) * | 2010-07-27 | 2018-05-18 | 新东工业株式会社 | Shot peening method and shot-peening apparatus |
| CN103567876A (en) * | 2012-07-25 | 2014-02-12 | 上海图博可特石油管道涂层有限公司 | High-pressure water sandblasting device for both inner surface and outer surface of steel pipe |
| CN104015130A (en) * | 2013-02-28 | 2014-09-03 | 天源环保有限公司 | Pipeline internal polishing process and device |
| CN103567879A (en) * | 2013-11-06 | 2014-02-12 | 山东开泰工业科技有限公司 | Multi-station rotary feeding sand blasting machine |
| CN105333919A (en) * | 2015-12-08 | 2016-02-17 | 大连华锐重工集团股份有限公司 | Steel chisel inclined inserting type heavy material level meter of industrial furnace |
| CN112171522A (en) * | 2020-09-09 | 2021-01-05 | 张翼翔 | Mechanical part surface sand blasting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1006868B (en) | 1990-02-21 |
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