CN107952730B

CN107952730B - Airless full-hydraulic inner cavity flushing equipment and method for manufacturing radiator for transformer

Info

Publication number: CN107952730B
Application number: CN201711291462.3A
Authority: CN
Inventors: 王天林; 曲寿晴; 任昌伟; 黄进军
Original assignee: Shenyang Tiantong Electric Co ltd
Current assignee: Shenyang Tiantong Electric Co ltd
Priority date: 2017-12-08
Filing date: 2017-12-08
Publication date: 2023-05-09
Anticipated expiration: 2037-12-08
Also published as: CN107952730A

Abstract

The equipment and the method for manufacturing the radiator for the transformer are characterized in that a flushing liquid tank is provided with a gas storage tank, an outlet pipeline of the flushing liquid tank is communicated with a return pipe between a branch pipe and a filter and the flushing liquid tank, two pipelines are separated after the flushing liquid tank is pumped to form a closed state with flushing liquid pipes at upper and lower ports of a workpiece, and a pressurizing pump is arranged; the online particle detector is arranged in a liquid outlet pipeline of the return pipe and the lower port, an exhaust pipeline is arranged between the flushing liquid tank and a liquid return pipe of the upper port of the workpiece, and each pipe is provided with a stop valve; the beam of the movable frame is fixed with a lifter and a lifting table. The online and beat type production process of the product is provided, the product is independently used, and the flushing performance of the inner cavity of the radiator meets the process requirements and exceeds the prior art. The device is provided with an exhaust pipeline and a gas storage tank, the inner cavity of the radiator is circularly pressurized and flushed in an airless full-hydraulic flow system, so that sundries reserved in the inner cavity cannot be precipitated, all spaces in the inner cavity are flushed by pressurized liquid, and the device is automatically converted into a leakage test mode after the flushing is finished.

Description

Airless full-hydraulic inner cavity flushing equipment and method for manufacturing radiator for transformer

Technical Field

The invention relates to the field of processing, in particular to flushing equipment for an inner cavity of a radiator for a high-voltage transformer, which is used for manufacturing an ultrahigh-voltage transformer.

Background

At present, the treatment process of the inner cavity of the radiator for manufacturing the high-voltage ultrahigh-voltage transformer adopts a non-online step-by-step treatment process mode. In the production process of the sheet radiator, welding slag, sundries and the like can be reserved in the forming and welding processes, and after the radiator is connected with the transformer, transformer oil in the transformer is communicated with the inner cavity of the radiator, so that sundry particles in the inner cavity of the radiator can possibly cause adverse effects on the safety of the high-voltage transformer, the cleanliness requirement on the inner cavity of the radiator is extremely high, and the cleanliness of certain high-voltage transformers on the inner cavity of the radiator can reach granularity indexes above 3 levels through transformer oil detection requirements. Because the radiator inner cavity is complex in shape and difficult to clean, the cleanliness of the radiator inner cavity becomes a bottleneck of an industrial production process, and an inner cavity liquid flushing process is adopted in the current industrial treatment process, and liquid mediums are divided into two categories of oil and water. The radiator is connected in the liquid pipeline, liquid is pumped in from the upper opening of the radiator oil collecting pipe through the liquid pump, foreign matters are taken away through liquid flow, a collecting bag with a specified mesh number is arranged on the lower outlet pipeline of the radiator oil collecting pipe, the liquid flows into the collecting bag under normal pressure, and the flushing effect is judged by observing the collected foreign matters through the collecting bag.

However, the radiator has the characteristics that the channels and narrow slits through which the heat dissipation oil in the inner cavity flows are large, the sectional area of all the channels is several times larger than that of the inlet and outlet, liquid naturally flows through the nearest channels or flows to the outlet through partial channels after entering the inner cavity through the liquid pump, bubbles or air exist in the channels which are not filled with the liquid, liquid flushing cannot be obtained, and foreign matters are difficult to clean out of the radiator. In spite of the increased pump pressure, air is still present in the majority of the channels and it is not possible to fill all channels with flushing liquid. Therefore, the current flushing technology has low treatment efficiency and high energy consumption, becomes a bottleneck of production, is not solved well, cannot realize on-line production, and can only realize a step-by-step production mode.

Disclosure of Invention

The invention aims to provide an airless full-hydraulic inner cavity flushing device and method for manufacturing a radiator for an ultrahigh voltage transformer, which can be used independently or provided for an online production line of the radiator for the ultrahigh voltage transformer.

The airless full-hydraulic inner cavity flushing equipment for manufacturing the radiator for the high-voltage transformer is used for an online production line of the radiator for the ultrahigh-voltage transformer and comprises an automatic transmission line, a lifting motor, an operation control system and flushing equipment, and is characterized in that a flushing liquid tank is provided with a gas storage tank and is connected through a liquid filling pipe, an outlet pipeline of the flushing liquid tank is communicated with a liquid pump through a three-way pipe, a branch pipe of the flushing liquid tank is communicated with a return pipe between a filter and the flushing liquid tank, a flushing liquid return pipe is separated from the liquid pump through the three-way pipe, a flushing liquid lower pipe and upper and lower openings of a workpiece form a closed circulation pipeline, and a pressurizing pump is arranged in the pipeline; a circulating liquid filling valve, an online particle detector and an initial flushing valve are arranged on a flushing liquid lower pipe communicated with a lower opening of the workpiece, and the flushing liquid lower pipe and a flushing liquid return pipe head are connected to the lower opening and the upper opening of the workpiece through an automatic hydraulic fastening device; the three-way pipe straight pipe of the liquid pump is communicated with the upper port of the workpiece, a flushing circulation valve is arranged on the flushing liquid return pipe near the upper port, a stop valve is arranged near the front of the three-way pipe, and a pressurizing pump and a pressurizing valve thereof are arranged between the two valves; a branch pipe communicated with the filter is connected with a return pipe between the flushing liquid tank and the filter, a filter valve is arranged on the return pipe, the other end of the online particle detector is connected with the return pipe, and a fork pipeline communicated with the lower opening of the workpiece is also communicated with the filter; an exhaust pipeline and an exhaust valve are also arranged between the flushing liquid tank and the upper opening of the workpiece flushing liquid pipe head; part of pipelines in the pipelines are hoses, a movable frame is arranged in front of a station, the wide ends of the bottoms of the movable frames for supporting the flushing fluid pipe heads and the pipelines are arranged on a sliding rail, a lifting machine is arranged in an upper frame of the movable frame, a lifting table is arranged in a middle frame, and the height of the middle frame is adjusted to be consistent with the height of a lower opening of a workpiece; the filter is provided with a hydraulic clamping cover, the center of the cover is provided with a visual window, the internal pressure is kept at 0.1-0.2 Mpa, the bottom of the air storage tank of the metal corrugated pipe is provided with a liquid discharge port and a liquid discharge valve, and flushing liquid can be recovered;

the using method comprises the following steps: the automatic closing valve is characterized in that when liquid in the cavity overflows, the baffle sensor sends out an instruction, and the valve is automatically closed: sequentially comprises a circulating liquid filling valve, a filtering valve, a liquid discharging valve, an exhaust valve, an initial liquid filling valve and a pressurizing valve; simultaneously opening the valve: the device comprises a stop valve, a reflux valve, a flushing circulation valve and an initial flushing valve in sequence: and then starting the liquid pump to enter automatic flushing operation.

The process has the positive effects that

The technology of the invention provides a beat type production process for manufacturing the radiator for the ultrahigh voltage transformer, which is characterized in that the product is transferred on line through a transmission chain, the equipment can be independently used, and the flushing performance of the inner cavity of the radiator meets the process requirement and exceeds the prior art. The device is provided with an exhaust pipeline and a gas storage tank, the inner cavity of the radiator is circularly pressurized and flushed in an airless full-hydraulic flow system, and particularly enters from the lower opening of the radiator, so that sundries reserved in the inner cavity cannot be precipitated, and all the spaces in the inner cavity are flushed by pressurized liquid, thereby the flushing efficiency is very high, and the device is automatically converted into a leakage test mode after the flushing is finished.

Drawings

FIG. 1 is a schematic illustration of a lumen flushing device arrangement;

fig. 2 is a block diagram of a leak test and rinse flow in a process for treating a radiator cavity.

Naming of the valves in fig. 1: f1: circulation charging valve, F2: stop valve, F3: filter valve, F4: drain valve, F5: reflux valve, F6: exhaust valve, F7: flushing a circulation valve, F8: initial charge valve, F9: pressurization valve, F10: an initial flush valve.

Detailed Description

The airless full-hydraulic inner cavity flushing equipment for manufacturing the radiator for the ultrahigh voltage transformer is used for an online production line of the radiator for the ultrahigh voltage transformer, and comprises an operation control system, an automatic transmission line, a lifting motor for each workpiece on line, and flushing equipment, wherein the equipment is arranged as shown in figure 1; a circulating liquid filling valve F1, an online particle detector A and an initial flushing valve F10 are arranged on a flushing liquid lower pipe G2a communicated with the lower opening of the workpiece M, and the heads of the flushing liquid lower pipe G2a and a flushing liquid return pipe G2b are connected to the lower opening and the upper opening of the workpiece M through an automatic hydraulic fastening device J; the three-way pipe straight pipeline of the liquid pump E is communicated with the upper port of the workpiece M, a flushing circulation valve F7 is arranged on a flushing liquid return pipe G2b close to the upper port, a stop valve F2 is arranged in front of the three-way pipe, and a pressurizing pump K and a pressurizing valve F9 are arranged between the two valves; a branch pipe communicated with the filter D is connected with a return pipe between the flushing liquid tank C and the filter D, a filter valve F3 is arranged on the return pipe, the other end of the online particle detector A is connected with the return pipe, and a fork pipeline communicated with the lower opening of the workpiece M is also communicated with the filter D; an exhaust pipeline B2 and an exhaust valve F6 are also arranged between the flushing fluid tank C and the head of the flushing fluid return pipe G2B at the upper opening of the workpiece; part of pipelines in the pipelines are hoses, a movable frame F is arranged in front of a station, the wide ends of the bottoms of the movable frames F for supporting flushing fluid pipe heads and the pipelines are arranged on a sliding rail, two layers of horizontal long frames are arranged on the movable frame and in the middle of the movable frame, a beam parallel to the long sides is arranged in an upper frame, a lifting machine H is fixed in the upper frame, and the middle frame is used for adjusting a lifting table N regulated according to the length of a workpiece to be consistent with the height of a lower opening of the workpiece; the filter D is provided with a hydraulic clamping cover, the center of the cover is provided with a visual window R, the internal pressure is kept at 0.1-0.2 Mpa, the bottom of the metal corrugated pipe air storage tank B is provided with a liquid discharge port and a liquid discharge valve F4, and flushing liquid can be recovered.

The automatic transmission line Q is provided with a semi-ring rail at the position adjacent to the flushing station to the leakage repairing station, and is used for returning to the flushing station after welding the workpiece with the leakage point to be repaired.

The using method of the device comprises the following steps: referring to fig. 2, the height of the upper flange of the liquid pipeline is adjusted according to the center distance of the transmitted workpiece, the height of the lower opening of the workpiece is automatically adjusted by an electric hoist on an automatic transmission line to be consistent with the opening of a flushing liquid lower pipe G2a, a radiator workpiece added with an ID code is vertically and on-line transmitted, and enters an airless full-hydraulic flowing inner cavity flushing device, a movable frame switch and a liquid inlet and outlet connection opening of an inner cavity flushing device on a butt-joint movable frame in the advancing process of the upper opening and the lower opening of the workpiece are opened, the flange size of a clamping device suitable for an incoming workpiece is adjusted, and the upper opening and the lower opening of the workpiece are automatically clamped by a hydraulic clamping device J; the method is characterized by comprising the following steps:

1. filling liquid into the inner cavity of the radiator, closing the F3/F9/F4, namely the filter valve F3, the pressurizing valve F9 and the liquid discharging valve F4, opening the F1/F2/F5/6/F7/F8/F10, namely the circulating liquid filling valve F1, the stop valve F2, the reflux valve F5, the exhaust valve F6, the flushing circulating valve F7, the initial liquid filling valve F8 and the flushing valve F10, starting the liquid pump E, enabling the liquid to enter the inner cavity of the workpiece, extruding air in the cavity into the flushing liquid tank C and transmitting the air into the metal corrugated air storage tank B, and automatically compensating the volume until the inner cavity of the radiator is filled with the liquid;

2. and (3) flushing a workpiece: and after the F1/F3/F4/F6/F8/F9 is closed, namely the circulating charging valve F1, the filtering valve F3, the discharging valve F4, the exhaust valve F6, the initial charging valve F8 and the pressurizing valve F9, the F2/F5/F7/F10, namely the stop valve F2, the reflux valve F5, the flushing circulating valve F7 and the flushing valve F10 are opened, a liquid pump is started, and the liquid is continuously flushed through flushing pipelines G2a and G2b, a filter D and a workpiece. The operation time of flushing and filtering is 5-10 minutes;

3. on-line synchronous inspection, after the flushing time is met, the liquid pump E is closed, the circulating liquid filling valve F1 and the reflux valve F5 are closed, the exhaust valve F6 is opened for exhausting, the impurity condition in the filter is observed through the artificial visual window, and if necessary, the filter is opened for cleaning the filter bag. Then, when the granularity index of the closed flushing liquid reaches a specified value, the flushing is qualified, and the pump is stopped;

4. liquid return tank: closing the pump liquid pump E or the pressurizing pump K, closing the valves F1\F2\F4\F5\F7\F8\F9, namely the circulating filling valve F1, the stop valve F2, the liquid discharging valve F4, the reflux valve F5, the flushing circulating valve F7, the initial filling valve F8 and the pressurizing valve F9, and opening the valves F3\F6\F10, namely the filtering valve F3, the exhaust valve F6 and the flushing valve F10, wherein the liquid automatically returns to the oil tank due to the compensation function of the metal corrugated oil storage tank.

5. Opening the filter D, manually checking the visual window R, checking and removing impurity conditions in the filter, and cleaning in time when needed;

6. the hydraulic pump is arranged in the liquid injection and liquid discharge processes, the liquid storage tank B performs volume compensation on the flushing liquid tank C, keeps isolation from the atmosphere, does not discharge waste gas, and achieves the environment-friendly effect.

7. And (5) leak testing: during the flushing process, the inner cavity is free of air, and if leakage points can leak out liquid, the inner cavity is checked. After the flushing is stopped, the leakage-testing pressurizing pump K is started, the pressurizing valve F9 injects liquid into the workpiece, and the pressure of the liquid is determined according to the pressure standard customized by the product. The leakage test is carried out by keeping flushing and pressurizing to 0.15 MPa-0.25 MPa, and the leakage test can be automatically converted into the instant leakage test in the flushing process;

8. after the detection of the leakage points, if the leakage points are transferred to the semi-ring track to the leakage repairing station, returning to the flushing station after welding to flush again for leakage detection, and entering the workpiece collecting and placing area after the detection is finished to wait for the next working procedure.

Claims

1. An airless full-hydraulic inner cavity flushing device for manufacturing a radiator for a transformer is used for an online production line of the radiator for an ultrahigh voltage transformer and comprises an automatic transmission line (Q), an electric hoist (P), an operation control system and an inner cavity flushing device, and is characterized in that a flushing liquid tank (C) is provided with a metal corrugated gas storage tank (B) and is connected through a liquid filling pipeline (G3), an outlet pipeline of the flushing liquid tank (C) is communicated with a liquid pump (E) through a first three-way pipe, a branch pipe of the first three-way pipe is communicated with a return pipe between a filter (D) and the flushing liquid tank (C), a flushing liquid return pipe (G2B) separated from a second three-way pipe after the liquid pump (E), a flushing liquid lower pipe (G2 a) and a radiator workpiece (M) form a closed circulation pipeline, and a pressurizing pump (K) is arranged in the pipeline; a circulating liquid filling valve (F1), an online particle detector (A) and an initial flushing valve (F10) are arranged on a flushing liquid lower pipe (G2 a) communicated with the lower opening of the workpiece (M), and the pipe heads of the flushing liquid lower pipe (G2 a) and the flushing liquid return pipe (G2 b) are connected to the lower opening and the upper opening of the workpiece (M) through an automatic hydraulic fastening device (J); a second three-way pipe straight pipeline of the liquid pump (E) is communicated with an upper port of the workpiece (M), a flushing circulation valve (F7) is arranged on a flushing liquid return pipe (G2 b) close to the upper port, a stop valve (F2) is arranged in front of the second three-way pipe, and the pressurizing pump (K) and a pressurizing valve (F9) thereof are arranged between the two valves; the branch pipe communicated with the filter (D) is connected to a return pipe between the flushing liquid tank (C) and the filter (D), a filter valve (F3) is arranged on the return pipe, the other end of the online particle detector (A) is connected to the return pipe, and a fork pipeline communicated with the lower opening of the workpiece (M) is also communicated with the filter (D); an exhaust pipeline (B2) and an exhaust valve (F6) are also arranged between the flushing liquid tank (C) and the head of the flushing liquid return pipe (G2B) at the upper opening of the workpiece (M); a part of the exhaust pipeline (B2) is a hose, a movable frame (L) is arranged in front of a station, the wide end of the bottom of the movable frame (L) for supporting a flushing fluid pipe head and the pipeline is arranged on a sliding rail, two layers of horizontal long square frames are arranged on the movable frame and in the middle of the movable frame, a lifting machine (H) is fixed on a beam parallel to the long side in the upper frame, and the middle frame is a lifting table (N) for adjusting the height of the lifting table according to the length of the workpiece (M) and is consistent with the height of the lower opening of the workpiece (M); the filter (D) is provided with a hydraulic clamping cover, the center of the cover is provided with a visual window (R), the internal pressure is kept at 0.1-0.2 Mpa, the bottom of the metal corrugated air storage tank (B) is provided with a liquid discharge port and a liquid discharge valve (F4), and flushing liquid can be recovered.

2. The airless, full-hydraulic, cavity flushing apparatus for manufacturing a radiator for transformers according to claim 1, characterized in that the automatic transmission line (Q) is provided with a half-ring rail adjacent to the flushing station to the leak repairing station for the welding of the work pieces (M) to be repair welded with leaks, and then returned to the flushing station.

3. A method of using the airless, full hydraulic cavity flushing apparatus of claim 1 to manufacture a radiator for a transformer, characterized by: according to the center distance of the workpiece (M), the height of an upper flange of a liquid pipeline is adjusted, an electric hoist on an automatic transmission line automatically adjusts the height of a lower opening of the workpiece (M) to be consistent with the opening of a flushing liquid lower pipe (G2 a), a radiator workpiece (M) added with an ID code is vertically transmitted on line, enters an airless full-hydraulic inner cavity flushing device, a movable frame switch is opened, an inlet port and an outlet port of an inner cavity flushing device on the movable frame are butted in the advancing process of the upper opening flange and the lower opening flange of the workpiece (M), the flange size of the fastening device suitable for an incoming part is adjusted, and the upper opening flange and the lower opening flange of the workpiece (M) are automatically clamped by a hydraulic fastening device (J); the method comprises the following steps:

1. filling the inner cavity of a radiator workpiece (M) with liquid, closing a filter valve (F3), a pressurizing valve (F9) and a liquid discharge valve (F4), opening a circulating liquid filling valve (F1), a stop valve (F2), a backflow valve (F5), an exhaust valve (F6), a flushing circulating valve (F7), an initial liquid filling valve (F8) and an initial flushing valve (F10), starting a liquid pump (E), allowing the liquid to enter the inner cavity of the workpiece (M), extruding air in the cavity into a flushing liquid tank (C) and transmitting the air into a metal corrugated gas storage tank (B), and automatically compensating the volume until the inner cavity of the radiator workpiece (M) is filled with the liquid;

2. and (3) flushing a workpiece: closing a circulation liquid filling valve (F1), a filtering valve (F3), a liquid discharging valve (F4), an exhaust valve (F6), an initial liquid filling valve (F8) and a pressurizing valve (F9), opening a stop valve (F2), a reflux valve (F5), a flushing circulation valve (F7) and an initial flushing valve (F10), and starting a liquid pump, wherein liquid continuously washes through a flushing liquid lower pipe (G2 a), a flushing liquid reflux pipe (G2 b) and a filter (D) and a radiator workpiece (M), and the operation time of flushing and filtering is 5-10 minutes;

3. on-line synchronous inspection, after the flushing time is met, closing a liquid pump (E), closing a circulating liquid filling valve (F1) and a reflux valve (F5), opening an exhaust valve (F6) to exhaust, observing the impurity condition in the filter through a manual visual window, opening the filter to clean the filter bag if necessary, and when the granularity index of flushing liquid reaches a specified value, flushing to be qualified and stopping the pump;

4. liquid backwash liquid tank: closing a liquid pump (E) or a pressurizing pump (K), closing a circulating charging valve (F1), a stop valve (F2), a liquid discharging valve (F4), a backflow valve (F5), a flushing circulating valve (F7), an initial charging valve (F8) and a pressurizing valve (F9), and opening a filter valve (F3), an exhaust valve (F6) and an initial flushing valve (F10), wherein the liquid automatically returns to a flushing liquid tank (C) due to the compensation function of a metal corrugated gas storage tank;

5. opening the filter (D), manually checking the visual window (R), checking and removing impurity conditions in the filter, and cleaning in time when needed;

6. the liquid injection and liquid discharge processes are provided with a hydraulic pump, the volume compensation is carried out on the flushing liquid tank (C) by the gas storage tank (B), the flushing liquid tank (C) is kept isolated from the atmosphere, no waste gas is discharged, and the environmental protection effect is realized;

7. and (5) leak testing: in the flushing process, the inner cavity is free of air, if leakage points can leak out liquid, after the flushing is stopped, a pressurizing pump (K) is started, a pressurizing valve (F9) injects liquid into the workpiece (M), and the pressure of the liquid is determined according to the pressure standard customized by the product; maintaining flushing and pressurizing to 0.15-0.25 MPa for leakage test, wherein the flushing process can be automatically converted into real-time leakage point inspection;

8. after the detection of the leakage points, if the leakage points are transferred to the semi-ring track to the leakage repairing station, returning to the flushing station after welding, flushing again to detect leakage, and entering the workpiece (M) collecting and placing area after the detection is finished to wait for the next working procedure.