CN1023636C - Infiltration process and equipment for cast pipe and large cast - Google Patents
Infiltration process and equipment for cast pipe and large cast Download PDFInfo
- Publication number
- CN1023636C CN1023636C CN 91106663 CN91106663A CN1023636C CN 1023636 C CN1023636 C CN 1023636C CN 91106663 CN91106663 CN 91106663 CN 91106663 A CN91106663 A CN 91106663A CN 1023636 C CN1023636 C CN 1023636C
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- closed chamber
- infiltration
- impregnant
- pipeline
- leak
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Abstract
The present invention relates to a partial infiltration method and a device for repairing the leakage of cast pipes and large castings, which is characterized in that an opening of a sealing chamber [9] is aligned with the surface of the leaked part of a casting [11], a sealing rubber ring [10] is used for sealing the opening, and a clamp [12] is used for fastening the opening; impregnant [6] in a liquid storage tank [5] is pressed into the pore space at the leaked part through the sealing chamber [9] under the pressure of a work system, and after the process of infiltration, a liquid return system is started to convey back residual impregnant [6] in a pipeline [7] and the sealing chamber [9] to the liquid storage tank [5]. The main body of the device of the present invention is arranged on a trolley, which is convenient for moving the device beside a part to be infiltrated for the process of partial infiltration. The device of the present invention has the advantages of simple structure, easy operation, low cost, high efficiency and little loss of the impregnant.
Description
The present invention relates to the reparation of casting defect, be specifically related to be subjected to the leakage defect of die casting to repair with the method for local infiltration.
Usually whole infiltration is adopted in the reparation that is subjected to the die casting leak, be about to foundry goods and put into pressurized tank, sealing vacuumizes then, impregnant is sucked in the foundry goods leak hole, because pressurized tank belongs to pressure vessel, the investment of consideration equipment, factory building and safety factor can not be made very greatly, so whole infiltration only is applicable to middle smallclothes.A kind of method of non-integral infiltration is disclosed among the clear 62-282829 of patent documentation, promptly by nozzle inject high pressure impregnant to the foundry goods space that seals mutually with nozzle, impregnant is pressed in the foundry goods hole by the foundry goods space, this method is saved impregnant than whole infiltration, and also miniaturization of equipment, it is mainly used in the middle or small aluminium casting that infiltration one by one has certain liquid storage space.Other has a kind of interior pressure infiltration method that is used for big part, be about to foundry goods and stay a port, all the other openings all seal, impregnant being filled core cavity and exert pressure from port then is pressed into the leakage hole impregnant, this method is leaked repair effective to foundry goods, but when being used in several meters long cast tube or large-scale shell casting, the impregnant loss is big, production efficiency is low, so fail to be used widely.
The purpose of this invention is to provide a kind of easy and simple to handle, part infiltration method that the impregnant loss is little that is applicable to cast tube and heavy castings;
Another object of the present invention be for realize above-mentioned local infiltration method provide a kind of simple in structure, cost is low, the convenient part infiltration equipment that uses.
The object of the present invention is achieved like this: the infiltrate opening of closed chamber of equipment of part is aimed at the leakage surface of cast tube or heavy castings, and will closed chamber opening border and leak between the surface and seal with O-ring seal, with anchor clamps closed chamber is fastened on leak again, then, the work system of local infiltration equipment is exerted pressure pipeline by closed chamber one side with the impregnant indentation sealing chamber in the receiver, through certain dwell time, impregnant is by in the hole that leaks the surface and be pressed into leak, after the infiltration, start the return liquid system pressurization, make the residue impregnant in closed chamber and the pipeline return receiver, the loss of whole process impregnant is minimum; The infiltrate main body of equipment of the present invention is placed on the dolly, can move to easily that the cast tube of leakage or heavy castings are other to carry out part infiltration processing.
Below in conjunction with accompanying drawing in detail the present invention is described in detail:
The schematic diagram of Fig. 1 when to be infiltration equipment to foundry goods (cast tube) carry out local infiltration.
Infiltration equipment of the present invention is made up of work system, closed chamber [9], O-ring seal [10], anchor clamps [12], time liquid work system and dolly (not shown), work system mainly comprises water-separating gas filter [1], pressure regulator valve [2], Pressure gauge [3], reversal valve [4], receiver [5], liquid level indicator [8], they successively preface be installed on the pipeline [7], its afterbody pipeline is connected with closed chamber [9] one sides; Return liquid system mainly comprises pressure regulator valve [2], Pressure gauge [3], reversal valve [4], cock [13], they successively preface be installed on another pipeline [7], its stem pipeline is connected with water-separating gas filter [1] by tee pipe coupling, and the afterbody pipeline is connected with closed chamber [9] opposite side; Anchor clamps [12] link to each other with closed chamber [9] both sides pin ear with bearing pin; Work system, closed chamber [9], return liquid system form a loop checking installation, and the equipment body that forms loop checking installation is placed on the dolly, carry out part infiltration processing so that be transplanted on the cast tube or heavy castings [11] side of leakage.
With outside work system, return liquid system pipeline [7] are connected, the other end then connects compressed air gas source to water-separating gas filter [1] in the local infiltration equipment, as the compressed air outlet of compressed air line or small-sized air compressor by tee pipe coupling; Pressure regulator valve [2] is respectively applied for to be adjusted the infiltration operating pressure and returns hydraulic coupling, operating pressure is selected to adjust according to the viscosity that kind had of foundry goods [11] leak thickness, the time of intending pressurize, impregnant [6], return hydraulic coupling then be lower than the infiltration operating pressure, a little more than atmospheric pressure; Liquid level display [8] is to show interior the impregnant of receiver [5] [6] liquid level position, so as during decision in receiver [5] interpolation impregnant [6]; Closed chamber [9] is for having the container of an opening, the shape of its opening border and curvature are consistent with the part leak surface of waiting to infiltrate, purpose is to use O-ring seal [10] afterwards, can make between the leakage surface of the border of closed chamber [9] and foundry goods [11] and seal, therefore, can design the closed chamber [9] of multiple model specification according to the description that is subjected to die casting, the arc opening that closed chamber is handled in the infiltration of using as cast tube can manufacture and design several by the radius of curvature size of cast tube respectively, only need change corresponding closed chamber during use and get final product; In like manner, the anchor clamps [12] that closed chamber [9] are anchored on leakers [11] surface also are to be beneficial to fastening position according to foundry goods [11] shape to design its structure, as bearing pin leading screw class anchor clamps; The cock of return liquid system [13] to the end that the pipeline [7] between the reversal valve [4] connects cock [13] is a transparent hose, whether has been full of closed chamber [9] in order to observe impregnant [6]; The O-ring seal [10] of sealing usefulness is that section configuration is the O-ring seal of rectangle.
The operation instructions that preparation before the infiltration in the said procedure-to the cleaning on leak surface, the method for dry available routine, the curing after the infiltration are handled then by used impregnant carry out, and main points of the present invention are in the infiltration program:
(1), the be installed closed chamber-opening of closed chamber [9] is aimed at the cast tube to be infiltrated or the leakage surface of heavy castings [11], use O-ring seal [10] with sealing between closed chamber [9] opening border and the leakage surface simultaneously, use anchor clamps [12] that closed chamber [9] is fastened on leak then;
(2), annotate impregnant-minute water water filter [1] and connect source of the gas, compressed air enters the pipeline [7] of work system and return liquid system by the arrow direction, the pressure regulator valve [2] of adjusting two systems respectively makes system pipeline pressure reach predetermined numerical value, open the cock [13] of return liquid system and lift reversal valve [4], make closed chamber [9], cock [13] and reversal valve [4] lead to atmosphere, press the reversal valve [4] of work system, compressed air enters receiver [5] makes impregnant [6] enter closed chamber [9] by liquid level display [8], when impregnant [6] when closed chamber [9] appears at the transparent hose by cock [13], cut-out tap [13] represents that closed chamber [9] has been full of impregnant [6] immediately;
(3), it is rapid that pressure impregnation-this step is right after previous step, after cut-out tap [13], work system pressure rises, to infiltrating operating pressure pressurize a period of time then, impregnant [6] in the closed chamber [9] is pressed in the hole of foundry goods [11] leak under pressure, and the relation between this step dwell time and the pressure describes in detail in the back;
(4), return liquid-pressure impregnation finish (being to arrive the dwell time), the reversal valve [4] that lifts work system makes it logical atmosphere, work system pressure descends, open the cock [13] of return liquid system again and press reversal valve [4], the hydraulic coupling of returning of return liquid system pipeline [7] is sent remaining impregnant [6] in closed chamber [9] and the work system pipeline [7] back to receiver [5];
(5), unload closed chamber-infiltration and dispose, anchor clamps [12] are unclamped, unload closed chamber [9] and O-ring seal [10], and they and anchor clamps are placed in to get ready on the dolly time use.
We select operating pressure during about pressure impregnation like this:
The retention time of local infiltration operating pressure is the time that impregnant is filled out capillary (leakage hole) process, poiseuille (Poiseuille) formula that moves along the pipe advection according to viscous liquid:
V＝ (△P)/(8μl) πr
4t……①
In the formula: the volume that flows through liquid in the v-pipe
△ P-liquid flows into and the pressure differential that flows out the pipe both sides (promptly claiming the infiltration operating pressure)
The viscosity of u-liquid
The radius of r-pipe
The length of l-pipe
Because v=π r when liquid fills up capillary
2L so allow liquid be full of the time capillaceous is:
t＝ (8ul2)/(r2△P) ……②
Be operating pressure △ P=(8ul
2)/(r
2T) ... 3.
3. formula illustrates square being directly proportional of operating pressure and foundry goods leak thickness, the dwell time is inversely proportional to, impregnant viscosity is directly proportional.
Getting casting thickness is 10mm, l=10mm under the perfect condition, be clear opening, the impregnant viscosities il is when 38CP, and the minimum aperture lyriform pore directly is 0.5 μ m, pressure differential △ P=0.1MPa, calculate t=20min, get the X=pi/2 if consider hole capillary bending coefficient X(), t then is 35 minutes, if consider factor such as on-way resistance capillaceous again, t should be greater than 35 minutes, and we get the pressure differential retention time more than 50 minutes.When infiltration pressure △ P=0.5MPa, can learn that by formula pressure improves 5 times, the time then is original 1/5, promptly under 0.5MPa pressure, dwell time t=10min, if △ is P=0.35MPa, t ≈ 15min then.
Application examples of the present invention:
The cast iron pipe leak is carried out the part infiltration handles,
Cast iron pipe specification: Dg100～Dg600mm, 9 kinds
Impregnant: the efficient silicate colloid of the WJJ8201 impregnant that uses the applicant's invention
Operating pressure: 0.35Mpa
Dwell time: 15min
Solidification temperature: 120 ℃
Mode of heating: electric heating wind heater heats infiltration place
The qualification rate of once infiltrating: 89%
The impregnant that average every cast iron pipe consumes:＜50g
Operating efficiency: two people operate more than 20 of a class (the 8 hours dutys) processing of can infiltrating (comprise solidifying and handle).
Can obviously find out advantage of the present invention in sum:
1. the qualification rate of once infiltrating reaches more than 80% good practical effect;
2. the impregnant loss is minimum, is loss minimum in the various infiltration methods;
3. simple, with low cost, the easy operating of local infiltration device structure, the convenient use.
Claims (6)
1, a kind ofly be suitable for the part infiltration method that cast tube and heavy castings pressurized leak are repaired, comprise that the cleaning on leak surface and drying, the closed chamber that is installed, pressurized are infiltrated, time liquid, unload closed chamber, curing, it is characterized in that:
To the infiltrate opening of equipment closed chamber of a is aimed at the surface of leak, simultaneously with O-ring seal with the opening border with leak face seal, and closed chamber is fastened on leak with anchor clamps;
The work system pressurization of b infiltration equipment with the pipeline indentation sealing chamber of the impregnant in the receiver by closed chamber one side, and protection operating pressure certain hour, makes impregnant by in the hole that leaks the surface and be pressed into leak;
After the c infiltration was handled, the return liquid system pressurization of infiltration equipment made the residue impregnant in closed chamber and the work system pipeline return receiver.
2, local infiltration method according to claim 1, the viscosity that the operating pressure that it is characterized in that infiltrating depends on that leak thickness, dwell time, impregnant kind have returns that hydraulic coupling then is lower than operating pressure and a little more than atmospheric pressure.
3, a kind of infiltration equipment that is suitable for cast tube and the local infiltration of heavy castings is made up of work system, closed chamber [9], O-ring seal [10], anchor clamps [12], return liquid system and dolly, work system mainly comprises water-separating gas filter [1], pressure regulator valve [2], Pressure gauge [3], reversal valve [4], receiver [5], the liquid level indicator [8] that connects compressed air gas source, they successively preface be installed on the pipeline [7], its afterbody pipeline is connected with closed chamber [9] one sides; Return liquid system mainly comprises pressure regulator valve [2], Pressure gauge [3], reversal valve [4], cock [13], they also successively preface be installed on another pipeline [7], its stem pipeline is connected with water-separating gas filter [1] by tee pipe coupling, and the afterbody pipeline is connected with closed chamber [9] opposite side; Anchor clamps [12] link to each other with closed chamber [9] both sides pin ear with bearing pin; Work system, closed chamber [9], return liquid system form a loop checking installation, it is characterized in that:
A closed chamber [9] is for having the container of an opening, and the shape of its opening border and curvature are surperficial consistent with the part leak of waiting to infiltrate and can seal;
The equipment body that b forms loop checking installation is placed on the dolly.
4, infiltration equipment according to claim 3 is characterized in that cock in the return liquid system [13] to the end that the pipeline [7] between the reversal valve [4] connects cock [13] is a transparent hose.
5, infiltration equipment according to claim 3 is characterized in that reversal valve [4] is the pull-type two position three-way valve.
6, infiltration equipment according to claim 3 is characterized in that O-ring seal [10] is the flat seal cushion rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106663 CN1023636C (en) | 1991-04-09 | 1991-04-09 | Infiltration process and equipment for cast pipe and large cast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91106663 CN1023636C (en) | 1991-04-09 | 1991-04-09 | Infiltration process and equipment for cast pipe and large cast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1065229A CN1065229A (en) | 1992-10-14 |
| CN1023636C true CN1023636C (en) | 1994-02-02 |
Family
ID=4908050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91106663 Expired - Fee Related CN1023636C (en) | 1991-04-09 | 1991-04-09 | Infiltration process and equipment for cast pipe and large cast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023636C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861714A (en) * | 2012-09-26 | 2013-01-09 | 江苏徐航科技有限公司 | Local vacuum infiltration method for die-casting aluminum alloy shell |
| CN103008173B (en) * | 2012-12-26 | 2015-04-22 | 重庆蓝黛动力传动机械股份有限公司 | Transmission housing infiltration device and method |
| CN104907552A (en) * | 2015-06-02 | 2015-09-16 | 遵义金业机械铸造有限公司 | Casting gap repairing device |
| CN105627025B (en) * | 2015-12-28 | 2017-11-21 | 钱光勇 | A kind of method for repairing and mending of pumping plant cast iron pipe leak |
| CN110238922B (en) * | 2019-08-01 | 2021-05-11 | 湖南极木连城家居有限公司 | Crack repairing device for wooden products |
-
1991
- 1991-04-09 CN CN 91106663 patent/CN1023636C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1065229A (en) | 1992-10-14 |
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