CN201549371U - Hydraulic constant-pressure device used in drying process of transformer coil - Google Patents
Hydraulic constant-pressure device used in drying process of transformer coil Download PDFInfo
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- CN201549371U CN201549371U CN2009202482126U CN200920248212U CN201549371U CN 201549371 U CN201549371 U CN 201549371U CN 2009202482126 U CN2009202482126 U CN 2009202482126U CN 200920248212 U CN200920248212 U CN 200920248212U CN 201549371 U CN201549371 U CN 201549371U
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- oil
- oil cylinder
- reversing valve
- proportional reversing
- hydraulic
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Abstract
The utility model relates to a hydraulic constant-pressure device used in the drying process of a transformer coil. The hydraulic constant-pressure device comprises a central column, a piston rod, an oil cylinder, an upper pressing plate and a lower pressing plate, wherein the oil cylinder is fixedly connected with the bottom end of the central column. The extension and the retraction of the piston rod of the oil cylinder are controlled through a hydraulic circuit. The hydraulic circuit comprises an oil tank, an oil pump, a proportional reversing valve and an oil cylinder. The oil tank is connected with the oil cylinder through an oil pipe. The oil pump and the proportional reversing valve are sequentially arranged on the oil pipe. The oil cylinder is connected back to the oil tank through the proportional reversing valve. A pressure sensor is arranged at the rod cavity oil port of the oil cylinder. The utility model realizes the pressure maintaining in the drying process of the transformer coil through the hydraulic circuit under the control of the electric control device, no man is required for duty, the labor strength is reduced, the structure is reasonable, the pressure is maintained to be stable and the work efficiency of constant-pressure coil assembling is improved.
Description
Technical field
The utility model relates to the constant-voltage equipment in the transformer manufacturing process, a kind of specifically hydraulic constant pressure device of transformer coil dry run.
Background technology
The high-power transformer coil is in manufacturing process because its winding process is manual operation, therefore, even if with a kind of coil of model coiling well its axial height of back also be not wait usually.Therefore will axially carry out stable constant voltage to it in its dry process and press-fit, this process one is the unanimity that will guarantee its axial height, and two will not destroy the insulating barrier of coil in the process that press-fits.Existing constant-voltage equipment can cause constant voltage assembling coil work efficiency low in practical operation because manually control is adopted in its hydraulic system pressurize and pressure control, and the manual adjustments controlled pressure needs Attended mode, and labour intensity is big.
Summary of the invention
For addressing the above problem, the technical problems to be solved in the utility model provides a kind of hydraulic constant pressure device of rational in infrastructure, transformer coil dry run that pressurize is stable.
For achieving the above object, the utility model adopts technical scheme to be:
The hydraulic constant pressure device of the utility model transformer coil dry run, have oil cylinder and upper and lower pressing plate that center stand column, piston rod are fixedlyed connected with the center stand column bottom, stretch out and the indentation of oil cylinder piston bar are controlled by hydraulic circuit, described hydraulic circuit comprises fuel tank, oil pump, proportional reversing valve and oil cylinder, be connected by oil pipe between fuel tank and the oil cylinder, be provided with oil pump and proportional reversing valve on the oil pipe successively, oil cylinder takes back to fuel tank through proportional reversing valve again; The rod chamber oil port of oil cylinder is provided with pressure sensor.
Oil pipe between described proportional reversing valve and the oil pump is provided with guide's pressure-reducing valve; Oil pipe between described proportional reversing valve and the pressure sensor is provided with the secondary overflow valve; The hydraulic circuit that described fuel tank forms through oil pump, guide's pressure-reducing valve, proportional reversing valve, secondary overflow valve and oil cylinder is many groups, is connected in parallel between the flowline and tank drainback pipe of oil pump; Between the flowline of oil pump and tank drainback pipe, be provided with regulator.
The utlity model has following beneficial effect and advantage:
1. the utility model is realized the constant voltage pressurize of transformer coil dry run by hydraulic circuit under the control of electric control gear, need not manually on duty, the labour intensity that alleviates.
2. the utility model is rational in infrastructure, pressurize stable, has improved the operating efficiency of constant voltage assembling coil.
Description of drawings
Fig. 1 is the utility model front view;
Fig. 2 is the vertical view of top board among Fig. 1;
Fig. 3 is a hydraulic control circuit schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, the composition of the hydraulic constant pressure device of the utility model transformer coil dry run comprises constant-voltage equipment, hydraulic circuit and electric control gear.Wherein, constant-voltage equipment includes top board 1, center stand column 2, lower platen 5, oil cylinder 4, oil atomizer 3, pull bar 8, retaining mechanism 7, hydraulic quick coupler 6 etc.Described oil cylinder 4 is arranged on the top, center of lower platen 5, and its piston rod is fixedlyed connected with center stand column 2 bottoms; Oil atomizer 3 is sleeved on the oil cylinder 4, is used for advancing the dry run of stove to coil spray transformer oil at coil; The draw-in groove of differing heights is detachable the connection on the centre bore of top board 1 and the center stand column 2, and utilizes retaining mechanism 7 to lock.
Stretching out with indentation of oil cylinder 4 piston rods controlled by hydraulic circuit, this hydraulic circuit comprises fuel tank, oil pump 14, proportional reversing valve 11 and oil cylinder 4, be connected by oil pipe between fuel tank and the oil cylinder 4, be provided with oil pump 14 and proportional reversing valve 11 on the oil pipe successively, oil cylinder 4 takes back to fuel tank through proportional reversing valve 11 again; The rod chamber oil port of oil cylinder 4 is provided with pressure sensor 9.
For the safety that guarantees hydraulic circuit is normally moved, on the oil pipe between proportional reversing valve 11 and the oil pump 14, be provided with guide's pressure-reducing valve 13, on the oil pipe between proportional reversing valve 11 and the pressure sensor 9, be provided with secondary overflow valve 10, between the flowline of oil pump 14 and tank drainback pipe, be provided with regulator (present embodiment adopts overflow/unloader 12).
Above-mentioned fuel tank is many groups through the hydraulic circuit that oil pump 14, guide's pressure-reducing valve 13, proportional reversing valve 11, secondary overflow valve 10 and oil cylinder 4 form, and is connected in parallel between the flowline and tank drainback pipe of oil pump 14.It is to carry out drying in the vacuum drying tank for a plurality of transformer coils can be entered simultaneously that many group hydraulic circuits are set, to improve drying efficiency.
Electric control gear comprises: industrial computer, data collecting card, proportional reversing valve controller and such as other actuators such as contactors.Data collecting card is used to receive the pressure signal that pressure sensor 9 sends, and the feed pressure of oil cylinder is monitored in real time.Constant with the feed pressure of the constant and oil cylinder that guarantees hydraulic circuit pressure.
Operating process of the present utility model is as follows, earlier transformer coil is inserted on the center stand column 2 at oil cylinder 4 places, adjusts to the appropriate location;
In jar, connect hydraulic quick coupler 6 and realize the switching of oil pipe, after connection finishes, start Oil pump electrical machinery, pressurize according to preset pressure;
Begin drying course after being added to preset pressure, the pressure sensor 9 that hydraulic pressure returns can change the pressure signal in the stove into the signal of telecommunication and send to the control program of using Visual Basic language compilation in the electric control gear, control program comes the oily flow path direction of control ratio reversal valve 11 according to the size of current of default force value passing ratio reversal valve controller output, and then piston rod reciprocating motion in rod chamber of control oil cylinder 4, piston rod drives top board 1 by the center stand column 2 that is connected with it again and rises or descend, to regulate the pressure that 1 pair of coil of pressing plate is implemented, carry out the constant voltage pressurize;
Treat to come out of the stove after the coil drying finishes, pluck top board 1, the primary drying process is finished.
Present embodiment is gone into a jar drying simultaneously to 6 transformer coils, and each coil adopts same hydraulic constant pressure device, finishes constant voltage holding pressure control and dry run simultaneously with above-mentioned same steps as.
Claims (5)
1. the hydraulic constant pressure device of a transformer coil dry run, have oil cylinder and upper and lower pressing plate that center stand column, piston rod are fixedlyed connected with the center stand column bottom, stretch out and the indentation of oil cylinder piston bar are controlled by hydraulic circuit, it is characterized in that: described hydraulic circuit comprises fuel tank, oil pump (14), proportional reversing valve (11) and oil cylinder (4), be connected by oil pipe between fuel tank and the oil cylinder (4), be provided with oil pump (14) and proportional reversing valve (11) on the oil pipe successively, oil cylinder (4) takes back to fuel tank through proportional reversing valve (11) again; The rod chamber oil port of oil cylinder (4) is provided with pressure sensor (9).
2. by the hydraulic constant pressure device of the described transformer coil dry run of claim 1, it is characterized in that: the oil pipe between described proportional reversing valve (11) and the oil pump (14) is provided with guide's pressure-reducing valve (13).
3. by the hydraulic constant pressure device of the described transformer coil dry run of claim 1, it is characterized in that: the oil pipe between described proportional reversing valve (11) and the pressure sensor (9) is provided with secondary overflow valve (10).
4. press the hydraulic constant pressure device of claim 1,2 or 3 described transformer coil dry runs, it is characterized in that: described fuel tank is organized for through the hydraulic circuit that oil pump (14), guide's pressure-reducing valve (13), proportional reversing valve (11), secondary overflow valve (10) and oil cylinder (4) form more, is connected in parallel between the flowline and tank drainback pipe of oil pump (14).
5. by the hydraulic constant pressure device of the described transformer coil dry run of claim 1, it is characterized in that: between the flowline of oil pump (14) and tank drainback pipe, be provided with regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202482126U CN201549371U (en) | 2009-11-18 | 2009-11-18 | Hydraulic constant-pressure device used in drying process of transformer coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202482126U CN201549371U (en) | 2009-11-18 | 2009-11-18 | Hydraulic constant-pressure device used in drying process of transformer coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201549371U true CN201549371U (en) | 2010-08-11 |
Family
ID=42604551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202482126U Expired - Lifetime CN201549371U (en) | 2009-11-18 | 2009-11-18 | Hydraulic constant-pressure device used in drying process of transformer coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201549371U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050272A (en) * | 2012-12-26 | 2013-04-17 | 吴江市变压器厂有限公司 | Coil pressing device |
| CN103107652A (en) * | 2013-01-29 | 2013-05-15 | 合肥海德数控液压设备有限公司 | Hydraulic control system of digital large-range ultra-high precision coil trueing machine |
| CN103578739A (en) * | 2012-12-31 | 2014-02-12 | 大连信达变压器有限公司 | Novel controllable pressure drying method coil drying mode |
| CN103928229A (en) * | 2014-04-24 | 2014-07-16 | 国家电网公司 | Transformer coil and solid insulating material drying method |
-
2009
- 2009-11-18 CN CN2009202482126U patent/CN201549371U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050272A (en) * | 2012-12-26 | 2013-04-17 | 吴江市变压器厂有限公司 | Coil pressing device |
| CN103578739A (en) * | 2012-12-31 | 2014-02-12 | 大连信达变压器有限公司 | Novel controllable pressure drying method coil drying mode |
| CN103107652A (en) * | 2013-01-29 | 2013-05-15 | 合肥海德数控液压设备有限公司 | Hydraulic control system of digital large-range ultra-high precision coil trueing machine |
| CN103107652B (en) * | 2013-01-29 | 2016-05-04 | 合肥海德数控液压设备有限公司 | Digital coil shaper hydraulic control system |
| CN103928229A (en) * | 2014-04-24 | 2014-07-16 | 国家电网公司 | Transformer coil and solid insulating material drying method |
| CN103928229B (en) * | 2014-04-24 | 2016-02-17 | 国家电网公司 | A kind of transformer coil and solid insulating material drying means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: XINJIANG TBEA AUTOMATIC EQUIPMENT CO., LTD. Assignor: Xinjiang Tebian Electric Apparatus Stock Co., Ltd. Contract record no.: 2011650000006 Denomination of utility model: Hydraulic constant-pressure device used in drying process of transformer coil Granted publication date: 20100811 License type: Exclusive License Record date: 20110324 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |