CN201322138Y - Anti-leakage pre-pumping valve for mechanical pump of vacuum tube annealing furnace - Google Patents
Anti-leakage pre-pumping valve for mechanical pump of vacuum tube annealing furnace Download PDFInfo
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- CN201322138Y CN201322138Y CNU200820154502XU CN200820154502U CN201322138Y CN 201322138 Y CN201322138 Y CN 201322138Y CN U200820154502X U CNU200820154502X U CN U200820154502XU CN 200820154502 U CN200820154502 U CN 200820154502U CN 201322138 Y CN201322138 Y CN 201322138Y
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- valve
- vacuum
- valve disc
- mechanical pump
- valve seat
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Abstract
The utility model relates to an anti-leakage pre-pumping valve for a mechanical pump of a vacuum tube annealing furnace. The anti-leakage pure-pumping valve comprises a valve seat, a valve disc, a cylinder support, a cylinder, and a corrugated pipe, wherein the valve seat is provided with a cavity body, and steps are arranged on the inner wall of the valve seat; the valve disc is arranged in the cavity body of the valve seat, two side ends of the valve disc are corresponding to the steps on the inner wall, and a circular step is arranged at the middle part on the upper end surface in a protrudent manner of the valve disc; the cylinder support is arranged at the upper end part of the valve seat, and a through hole is formed thereon; the cylinder is arranged at the cylinder support, the end part of a piston rod penetrates the through hole of the cylinder support and is extended into the cavity body of the valve seat, and the valve disc is connected with the end part of the piston rod; one end of the corrugated pipe is propped against the bottom surface of the cylinder support and clamped by a front sealing ring for fixed connection, and the other end thereof is sleeved on the outside of the circular step on the upper end surface of the valve disc and clamped by a back sealing ring for fixed connection; and the front sealing ring and the back sealing ring are respectively fixedly connected with the valve disc and the cylinder support through screws. The anti-leakage pre-pumping valve effectively solves the problems of long vacuum pumping term, poor vacuum degree and the like caused by the leakage of the pre-pumping valve when the mechanical pump carries out the vacuum pumping on a furnace body of the vacuum furnace, thereby improving the thermal treatment quality of seamless steel tubes.
Description
Technical field
The utility model relates to the supplementary equipment of metallurgy, mechanical industry production seamless steel pipe, refers in particular to the anti-leak that is used for the employed vacuum type tubing of special alloy seamless steel pipe heat-treatment of annealing annealing furnace mechanical pump and takes out valve in advance.
Background technique
Seamless steel pipe is common metallurgical fabricated metals, and its production procedure is: pipe production (steel-making, steel rolling), steel tube blank (metal round steel), pipe are prepared (length cutting, surperficial peeling, spotting), circular steel are machined to be qualified pipe; Hollow forging is produced (hot-rolling perforation machine is processed into the hot rolling hollow forging to high temperature pipe perforation cogging with the metal pipe); Cold deformation processing according to the technical requirements of production tube, is adopted corresponding cold deformation (cold rolling, cold-drawn) processing technology, and operation in accordance with regulations requires hollow forging production to be become the finished product seamless steel pipe of requirement up to specification to carrying out cold deformation processing; Steel pipe heat treatment (Gu molten) to the steel pipe after the cold deformation, is carried out molten admittedly, annealing heat treatment; Steel pipe finishing (comprising Pipe Cutting, tack, aligning, inner and outer surface reconditioning) requires to carry out finishing in accordance with regulations to the steel pipe after the cold deformation and handles; Acid cleaning of steel tube to through the steel pipe after cold deformation, heat treatment, the finishing, carries out chemical treatment, cleans the grease that steel tube surface is adhered to; After the finished product seamless steel pipe that is up to the standards is cut surely, spray printing, packing, warehouse-in.
Novel steel grade (titanium alloy etc.) or the seamless steel pipe of specific (special) requirements (national defence, military project, nuclear power etc.) is arranged, needs because of metallicity, technical requirements, in the Conventional Heat Treatment annealing furnace, the correlation technique requirement can't be reached, the correlation technique requirement of heat-treatment of annealing must be under vacuum condition, just can reached; Vacuum type tubing annealing furnace has good reliability, convenient operating maintenance, long service life, workpiece (seamless steel pipe) non-oxidation, surface-brightening annealing, operation is pollution-free, can satisfy high-power outer circulation cooling system speed fast, can satisfy advantage such as special warfare needs, the special device that becomes the seamless steel pipe heat-treatment of annealing of current novel steel grade and special purpose, specific (special) requirements is widely used.
At present, be used for heat-treating under the seamless steel pipe vacuum state that annealing produces is detected in vacuum type tubing annealing furnace, vacuum type tubing annealing furnace is divided into two kinds of external vacuum type tubing annealing furnace and built-in vacuum type tubing annealing furnaces; ZRT-600-9/12W-1.5T tubing vacuum annealing furnace belongs to built-in vacuum type tubing annealing furnace, adopts single chamber, horizontal outer circulation, periodic heating, Cr20Ni80 band to add thermal design, adopts omnidistance Computer Control Technology; Form by body of heater, heater, heat screen, vacuum system, backfill and strong cooling system, compressed air system, cooling water recirculation system, power-supply system, electric control system, computer controlled system etc.; Its working principle is: with workpiece material (seamless steel pipe) place the furnace chamber of sealing → mechanical pump to start to vacuumize (oxidizing atmosphere reaches ideal value) → under vacuum condition, carry out predetermined thermal handles → cool off fast at inert gas atmosphere → workpiece material (seamless steel pipe) temperature is lower than its oxidizing temperature → workpiece material (seamless steel pipe) and transports furnace chamber exposure atmosphere; Non-oxidation, bright annealing under the seamless steel pipe vacuum state have so just been finished.
Vacuum system is the key device of vacuum type tubing annealing furnace, and ZRT-600-9/12W-1.5T tubing vacuum annealing furnace adopts 7 to overlap independently vacuum pumping device composition, can use respectively, also can use jointly; Every cover vacuum pumping device is made up of 1 K-600T diffusion pump, 1 ZJY-300 Roots pump, 1 2X-70 mechanical pump (claiming sliding vane rotary pump again), and the weight of every kind of pump is respectively 80KG, 75KG, 105KG; Vacuum valve adopts pneumatic structure, meets with when having a power failure to close automatically the protection vacuum environment; Reserve the vacuum measurement point in the whole system, sectional maintenance, convenient daily O﹠M, maintenance.
The actual conditions of degree of vacuum have determined vacuum furnace that workpiece material (seamless steel pipe) is heat-treated annealing and whether have reached due technical requirements and quality of processing in the vacuum furnace body of heater; The degree of vacuum of vacuum furnace relies on three types of pumps (diffusion pump, Roots pump, mechanical pump) work of vacuum system, make the degree of vacuum of vacuum chamber in the body of heater reach the technical requirements of heat-treatment of annealing, its working principle is: three types of pumps (diffusion pump, Roots pump, mechanical pump) are all born vacuumizing operation in the vacuum furnace body of heater, but the degree of vacuum that is extracted has nothing in common with each other, and wherein the mechanical pump barometric pressure 10
-1Pa, Roots pump 10
-2Pa, diffusion pump 10
-3Pa (and 10
-3More than the Pa), mechanical pump has been born normal atmospheric pressure treatment has been arrived initial relatively degree of vacuum state, and promptly barometric pressure 10
-1Pa, so vacuum furnace heat-treats when annealing, working machine pump is frequent, causes the easiest breaking down in three types of pumps (diffusion pump, Roots pump, mechanical pump); And the problem of degree of vacuum in the body of heater directly has influence on the annealing quality of production of seamless steel pipe.
In the production practices, the valve of taking out in advance of mechanical pump device easily breaks down, and influences the work of mechanical pump, influences the thermal effectiveness of tubing vacuum annealing furnace to workpiece material (seamless steel pipe).
At present mechanical pump break down maximum be the mechanical pump device take out valve in advance, taking out valve in advance is the critical piece of mechanical pump device; Taking out valve in advance is made up of parts such as cylinder, support, spool, pipelines, wherein cylinder is made up of parts such as cylinder body, piston, piston rod, end cap, Sealing, screw, nut, connecting pin, packing ring, cotter pins, support is made up of parts such as bearing, screws, spool is made up of parts such as valve seat, valve discs, and pipeline is made up of input pipeline and output pipeline two-part; Take out valve in advance and be installed in mechanical pump output pipeline top, be connected with diffusion pump, Roots pump by output pipeline respectively; When extracting the body of heater vacuum, by taking out the upper and lower vertical motion of valve cylinder piston rod in advance, drive the upper and lower vertical motion of valve disc in the spool, the control output pipeline is opened with closed, plays the effect that the control mechanical pump is connected with diffusion pump, Roots pump.
Causing and taking out the valve cause faults in advance is to exist to leak, because taking out valve in advance exists leakage point, cause barometric pressure from leakage point, rely on pressure difference to enter in the vacuum furnace body of heater, cause the interior atmosphere of body of heater vacuum chamber impure, the degree of vacuum weak effect finally causes the extracting vacuum time long (operation of mechanical pump long-time continuous), and the seamless steel pipe annealing quality is poor, the wearing and tearing of mechanical pump deterioration are big, fault is frequent.
Cause the main cause of taking out valve existence leakage in advance to be at present: because the impurity particle in the vacuum furnace body of heater (mainly is a metal fragment, the reason one that generates be because of degree of vacuum not high, the chip that produces because of oxidation when causing seamless steel pipe heat treatment, the 2nd, the seamless steel pipe turbidity test that enter in the body of heater are low, have impurity and moisture, it is to produce oxidation on metal surface that moisture causes initial heating), under the power of mechanical pump extracting vacuum, enter along pipeline and to take out valve valve disc place in advance, move upward at cylinder piston rod, this moment, valve disc was opened, impurity particle enters the encased valve in-core of taking out valve in advance under the effect of air-flow, impurity particle finally is adsorbed on the valve pocket of taking out valve in advance, valve seat, valve disc, part surfaces such as cylinder piston rod; Reciprocal vertical motion along with cylinder piston rod, impurity particle is being taken out the valve core inner accumulated in advance, and under the air-flow effect, form friction to part, finally cause taking out in advance the sealing part abrasion of valve, deterioration, leakage point appears, cause cylinder and the bearing of taking out valve in advance, leaking appears in connection part between valve seat and the bearing, cause barometric pressure by pressure flow to, automatically enter in the vacuum furnace body of heater, cause the extracting vacuum time long, the mechanical pump continuous operation, the parts depreciation aggravation, especially the seal arrangement attrition is big, and fault is frequent, and has influence on diffusion pump, the proper functioning of Roots pump.
The leakage problem of taking out valve in advance is the key factor that influences high request seamless steel pipe quality of product.
Summary of the invention
The purpose of this utility model is that a kind of anti-leak that is used for vacuum type tubing annealing furnace mechanical pump of design is taken out valve in advance, effectively solved mechanical pump in to the vacuum furnace body of heater during extracting vacuum, to leak the vacuum drawn time cause long because of taking out valve in advance, problems such as degree of vacuum difference, for reducing the energy (electric energy) consumption, reduce equipment attrition, prolonged mechanical pump working life, improve the seamless steel pipe thermal treatment quality and create conditions; Reasonable in design, compact structure, accurate positioning, material are cheap, working service convenience, highly versatile, safe and reliable, practicality and high efficiency.
For achieving the above object, the technical solution of the utility model is,
The anti-leak that is used for vacuum type tubing annealing furnace mechanical pump is taken out valve in advance, and it comprises, valve seat, and it has a cavity body structure, and inwall is provided with step; Valve disc is arranged in the valve seat cavity, and two side ends is corresponding with the inwall step, and its middle part, upper-end surface is convexly equipped with a step cutting pattern; Cylinder saddle is arranged at the valve seat upper end portion, has through hole on it; Cylinder is arranged at cylinder saddle, and its piston rod end is passed the cylinder saddle through hole and stretched into the valve seat cavity, and described valve disc is connected with this piston rod end; Bellows part, the one end is resisted against the cylinder saddle bottom surface, and grips connection by preceding seal ring; The other end is sheathed on the valve disc upper-end surface step cutting pattern outside, and grips connection by increasing back sealing ring, preceding seal ring, increasing back sealing ring respectively by screw be connected to a fixed with valve disc, cylinder saddle.
Further, described preceding seal ring, increasing back sealing ring one side surface have annular recess, and establish seal ring, lean with valve disc upper-end surface, cylinder saddle bottom surface respectively.
Again, described seal ring is the O RunddichtringO.
The utility model anti-leak is taken out valve in advance and is played the effect that completely cuts off valve pocket and cylinder by the bellows resiliently deformable, realizes the sealing compensation in the valve pocket.
The beneficial effects of the utility model:
1. reasonable in design, compact structure, practicality and high efficiency;
2. accurate positioning is firm, and good stability is safe and reliable;
3. dismounting is quick, O﹠M convenient, saving of work and time;
4. easy to make, material is cheap, reduces making, processing cost;
5. employing corrugated stainless steel tubing, the elastic deformability is strong, prevents corrosion, and using effect is good;
6. highly versatile to other equipment improvement of the same type, has reference, popularization, using value.
Description of drawings
Fig. 1 is the structural representation that the utility model anti-leak is taken out valve one embodiment's closed state in advance;
Fig. 2 is the structural representation that the utility model anti-leak is taken out the valve open mode in advance.
Embodiment
Referring to Fig. 1, Fig. 2, the utility model is used for the anti-leak of vacuum type tubing annealing furnace mechanical pump and takes out valve in advance, and it comprises, valve seat 1, and it has a cavity 11 structures, and inwall is provided with step 12; Valve disc 2 is arranged in valve seat 1 cavity 11, and two side ends is corresponding with inwall step 12, and its 21 middle parts, upper-end surface are convexly equipped with a step cutting pattern 211; Cylinder saddle 3 is arranged at valve seat 1 upper end portion, has through hole 31 on it; Cylinder 4 is arranged at cylinder saddle 3, and its piston rod 41 ends are passed cylinder saddle 3 through holes 31 and stretched into valve seat 1 cavity 11, and described valve disc 2 is connected with these piston rod 41 ends; Bellows part 5, one end be against cylinder saddle 3 bottom surfaces 32, and grip connection by preceding seal ring 6; The other end is sheathed on 21 step cutting patterns, 211 outsides, valve disc 2 upper-end surfaces, and grips connection by increasing back sealing ring 7, and preceding seal ring 6, increasing back sealing ring 7 are respectively by screw 10,10 ' and be connected to a fixed with valve disc 2, cylinder saddle 3.
During use, cylinder 4 to-and-fro motion, by the resiliently deformable of bellows part 5, stretch the interior impurity particle of vacuum furnace body of heater this moment with cylinder moving, under the power of mechanical pump extracting vacuum, enter along pipeline and to take out in advance in the valve, accumulate in by taking out valve base 1, cylinder saddle 3, valve disc 2 in advance and surrounded in the closed valve pocket that forms, but because black box such as bellows part 5 isolated can't enter positions such as cylinder, take out the sealing of valve junction surface in advance thereby reach protection, prevent the effect of leaking; Even if the part metals impurity particle is arranged, under the effect of extracting vacuum air-flow, enter mechanical pump by taking out the valve base outlet port in advance, because mechanical pump is equipped with filtrating equipment, can not cause damage to mechanical pump; During regular maintenance, take out valve in advance as long as open, just can in time clear up the metal impurities particle, working service is convenient, efficient.
The utility model has effectively solved mechanical pump in to body of heater during extracting vacuum, to leak the vacuum drawn time cause long because of taking out valve in advance, problems such as degree of vacuum difference, for reducing the energy (electric energy) consumption, reduce equipment attrition, prolonged mechanical pump working life, improve the seamless steel pipe thermal treatment quality and create conditions.
Claims (3)
1. the anti-leak that is used for vacuum type tubing annealing furnace mechanical pump is taken out valve in advance, it is characterized in that, comprise,
Valve seat, it has a cavity body structure, and inwall is provided with step;
Valve disc is arranged in the valve seat cavity, and two side ends is corresponding with the inwall step, and its middle part, upper-end surface is convexly equipped with a step cutting pattern;
Cylinder saddle is arranged at the valve seat upper end portion, has through hole on it;
Cylinder is arranged at cylinder saddle, and its piston rod end is passed the cylinder saddle through hole and stretched into the valve seat cavity, and described valve disc is connected with this piston rod end;
Bellows part, the one end is resisted against the cylinder saddle bottom surface, and grips connection by preceding seal ring; The other end is sheathed on the step cutting pattern outside, valve disc upper-end surface, and grips connection by increasing back sealing ring; Before seal ring, increasing back sealing ring respectively by screw be connected to a fixed with valve disc, cylinder saddle.
2. the anti-leak that is used for vacuum type tubing annealing furnace mechanical pump as claimed in claim 1 is taken out valve in advance, it is characterized in that, seal ring, increasing back sealing ring one side surface have annular recess before described, and establish seal ring, lean with valve disc upper-end surface, cylinder saddle bottom surface respectively.
3. the anti-leak that is used for vacuum type tubing annealing furnace mechanical pump as claimed in claim 2 is taken out valve in advance, it is characterized in that described seal ring is the O RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820154502XU CN201322138Y (en) | 2008-10-27 | 2008-10-27 | Anti-leakage pre-pumping valve for mechanical pump of vacuum tube annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820154502XU CN201322138Y (en) | 2008-10-27 | 2008-10-27 | Anti-leakage pre-pumping valve for mechanical pump of vacuum tube annealing furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201322138Y true CN201322138Y (en) | 2009-10-07 |
Family
ID=41159521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820154502XU Expired - Lifetime CN201322138Y (en) | 2008-10-27 | 2008-10-27 | Anti-leakage pre-pumping valve for mechanical pump of vacuum tube annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201322138Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100767A (en) * | 2014-07-25 | 2014-10-15 | 上海共和真空技术有限公司 | Aseptic isolating device for valve rod of main valve in freeze dryer and online leakage detection device thereof |
-
2008
- 2008-10-27 CN CNU200820154502XU patent/CN201322138Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100767A (en) * | 2014-07-25 | 2014-10-15 | 上海共和真空技术有限公司 | Aseptic isolating device for valve rod of main valve in freeze dryer and online leakage detection device thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAOSTEEL SPECIAL STEEL CO., LTD. Free format text: FORMER OWNER: BAOSHAN IRON + STEEL CO., LTD. Effective date: 20131210 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201900 BAOSHAN, SHANGHAI TO: 200940 BAOSHAN, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20131210 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIALSTEEL CO., LTD. Address before: 201900 Fujin Road, Shanghai, orchard, Baoshan District Patentee before: Baoshan Iron & Steel Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |
|
| CX01 | Expiry of patent term |