CN111521381B - Energy storage displacement measuring device - Google Patents
Energy storage displacement measuring device Download PDFInfo
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- CN111521381B CN111521381B CN202010351028.5A CN202010351028A CN111521381B CN 111521381 B CN111521381 B CN 111521381B CN 202010351028 A CN202010351028 A CN 202010351028A CN 111521381 B CN111521381 B CN 111521381B
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- assembly
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- displacement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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Abstract
The invention relates to the technical field of transformer substation safety, and particularly discloses an energy storage displacement measuring device which comprises a shell, and a pressure relief assembly, an indicating assembly and a displacement measuring assembly which are arranged on the shell, wherein the pressure relief assembly is connected with a pressure relief handle of a hydraulic spring operating mechanism and used for lifting the pressure relief handle; the indicating assembly is connected to a plurality of oil pressure travel switch contacts of the hydraulic spring operating mechanism and used for sending out indicating information when the oil pressure travel switch contacts are in a specified action state; the displacement measuring assembly is connected to the support ring of the hydraulic spring operating mechanism and used for measuring displacement between the support ring and a piston cylinder of the hydraulic spring operating mechanism so as to obtain energy storage displacement of each oil pressure travel switch contact corresponding to each indication information. The energy storage displacement measuring device disclosed by the invention is used for realizing uniform pressure relief through the pressure relief assembly, and reminding the appointed action state of the contact of the oil pressure travel switch through the indicating assembly, so that the operation difficulty is reduced, and the measuring accuracy and the measuring efficiency are improved.
Description
Technical Field
The invention relates to the technical field of transformer substation safety, in particular to an energy storage displacement measuring device.
Background
The hydraulic spring operating mechanism can compress the disc spring through the accumulator piston and store hydraulic energy in the energy storage piston cylinder for a long time, and necessary energy storage is made for opening and closing operations of the circuit breaker. In the maintenance operation of the circuit breaker, energy storage displacement of the hydraulic spring operating mechanism at the contact points of the oil pressure travel switches such as reclosing, closing and opening needs to be measured, a maintenance worker generally adopts a manual lifting pressure relief handle to relieve pressure of the hydraulic spring operating mechanism, the lifting height of the pressure relief handle corresponds to the pressure relief rate of the hydraulic spring operating mechanism, so that hydraulic energy stored in an energy accumulator is converted into displacement change between a support ring and a piston cylinder, and when the support ring and the piston cylinder move relatively, the contact points of the oil pressure travel switches can sequentially reach a corresponding designated working state. The corresponding actual energy storage displacement when each oil pressure travel switch contact points are in the appointed working state is measured by the caliper, and the oil pressure of the hydraulic spring operating mechanism at each oil pressure travel switch contact point is obtained according to the comparison between the measured actual energy storage displacement and the standard energy storage displacement, so that the working condition of the hydraulic spring operating mechanism is judged. However, the following problems exist during the operation:
(1) when the pressure relief handle is lifted manually to relieve pressure, uniform force is difficult to ensure, so that the relative movement speed of the piston cylinder and the support ring is not uniform, the specified working state of the oil pressure travel switch contact can be missed, the finally measured energy storage displacement is not the energy storage displacement in the specified working state of the oil pressure travel switch contact, and the accuracy of the measurement result is reduced;
(2) when the pressure is manually relieved, on one hand, the working state of the contact of the oil pressure travel switch needs to be observed, on the other hand, the stored energy displacement of each contact needs to be measured by using a caliper, the measuring process is easily influenced by the surrounding working environment and the operation proficiency and operation agility of maintainers, and the measuring accuracy is also reduced; and once the specified working state of the contact of the oil pressure travel switch is missed, the hydraulic spring operating mechanism needs to be stored again, and the energy storage displacement measurement operation is carried out again, so that the measurement efficiency is also reduced.
Disclosure of Invention
The embodiment of the invention aims to provide an energy storage displacement measuring device which is high in measuring accuracy and measuring efficiency.
To achieve the purpose, the embodiment of the invention adopts the following technical scheme:
the energy storage displacement measuring device comprises a shell, and a pressure relief assembly, an indicating assembly and a displacement measuring assembly which are arranged on the shell, wherein the pressure relief assembly is connected with a pressure relief handle of the hydraulic spring operating mechanism and used for lifting the pressure relief handle; the indicating assembly is connected to a plurality of oil pressure travel switch contacts of the hydraulic spring operating mechanism and used for sending out indicating information when the oil pressure travel switch contacts are in a specified action state; the displacement measuring assembly is connected to a support ring of the hydraulic spring operating mechanism and used for measuring displacement between the support ring and a piston cylinder of the hydraulic spring operating mechanism so as to obtain energy storage displacement of each oil pressure travel switch contact corresponding to each piece of indication information.
As a preferable scheme of the energy storage displacement measuring device, the pressure relief assembly comprises a supporting structure for supporting the pressure relief handle and a lifting structure connected with the supporting structure, the lifting structure is used for lifting the supporting structure by a plurality of unit heights, and the number of the unit heights corresponds to the expansion rate of relative expansion displacement between the supporting ring and the piston cylinder.
As an optimal scheme of the energy-storage displacement measuring device, the lifting structure comprises a lifting seat fixedly arranged on the shell and a screw movably connected with the lifting seat, the screw is fixedly connected with the supporting structure, a threaded hole is concavely formed in one side surface, close to the supporting structure, of the lifting seat, and the screw is in threaded fit connection with the threaded hole.
As a preferable scheme of the energy-storage displacement measuring device, a locking mechanism is arranged on the lifting seat and used for locking the position of the screw rod relative to the lifting seat.
As a preferable embodiment of the energy storage displacement measuring device, the indicating assembly includes a plurality of indicating modules fixed on the housing, and a conducting wire having one end connected to the indicating modules and the other end connected to the hydraulic travel switch contacts, each of the indicating modules corresponds to one of the hydraulic travel switch contacts, each of the hydraulic travel switch contacts is turned on when in a specific action state, and the indicating module corresponding to the turned-on hydraulic travel switch contact sends out indicating information.
As a preferred embodiment of the energy storage displacement measuring device, the indicating module comprises an indicator light module and/or an audible alarm module.
As a preferable mode of the energy storage displacement measuring device, the indicating assembly further includes a coil holder disposed at a connection of the lead and the housing, and the coil holder is configured to wind the lead.
As a preferable aspect of the energy storage displacement measuring device, the displacement measuring assembly includes a measuring tape and a slot connected to the measuring tape, the slot is disposed in the housing, the measuring tape is movable relative to a guide groove of the slot, and the guide groove can accommodate the measuring tape.
As a preferable scheme of the energy storage displacement measuring device, an expansion joint is arranged at the joint of the measuring scale and the clamping groove, and the measuring scale can move in an expansion mode relative to the expansion joint or rotate relative to a central shaft of the expansion joint.
As a preferred embodiment of the energy storage displacement measuring device, the measuring tape is made of a magnetic material.
The embodiment of the invention has the beneficial effects that:
the energy storage displacement measuring device comprises a pressure relief assembly, an indicating assembly and a displacement measuring assembly which are arranged on a shell, wherein the pressure relief assembly is connected with a pressure relief handle of a hydraulic spring operating mechanism and used for lifting the pressure relief handle, so that hydraulic energy stored in an energy accumulator of the hydraulic spring operating mechanism can be relieved at a constant speed and converted into uniform and regular displacement change between a support ring and a piston cylinder; the indicating assembly is connected to a plurality of oil pressure travel switch contacts of the hydraulic spring operating mechanism and used for sending indicating information when the oil pressure travel switch contacts are in an appointed action state so as to stop the action of lifting the pressure relief handle when the oil pressure travel switch contacts are in the appointed action state, avoid the pressure relief handle from continuously acting and missing the appointed action state of the oil pressure travel switch contacts, and reduce the risk of re-measurement operation; the displacement measuring assembly is connected to the support ring of the hydraulic spring operating mechanism and used for measuring displacement between the support ring and a piston cylinder of the hydraulic spring operating mechanism so as to obtain energy storage displacement of each oil pressure travel switch contact corresponding to each indication information. According to the comparison between the measured actual energy storage displacement and the standard energy storage displacement, the oil pressure of the hydraulic spring operating mechanism at each oil pressure travel switch contact can be obtained, and the working condition of the hydraulic spring operating mechanism can be further judged. The energy storage displacement measuring device provided by the embodiment of the invention stably lifts the pressure relief handle through the pressure relief assembly, so that the phenomenon that the piston cylinder is relieved with an unstable manual lifting mode to miss the specified action state of the contact of the oil pressure travel switch is avoided, and the accuracy of the measuring result is improved; on the other hand, the indication assembly is arranged to remind an operator of the specified action state of the oil pressure travel switch contact, so that the operator can directly obtain the energy storage displacement of the oil pressure travel switch contact when acquiring the indication information sent by the indication assembly, the operation difficulty is reduced, and the measurement accuracy and the measurement efficiency are also improved.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of an energy storage displacement measurement device according to an embodiment of the present invention.
Fig. 2 is a schematic view of an assembly structure of an energy storage displacement measuring device and a hydraulic spring operating mechanism according to another embodiment of the present invention.
Fig. 3 is a partial structural schematic diagram of an energy storage displacement measuring device according to another embodiment of the present invention.
Fig. 4 is a partially enlarged structural diagram of a portion a in fig. 2.
In the figure:
1. a housing; 2. a pressure relief assembly; 21. a support structure; 22. a lifting structure; 221. lifting the seat; 222. a screw; 223. a locking mechanism; 3. an indicating component; 31. an indication module; 32. a wire; 33. a coil holder; 4. a displacement measuring assembly; 41. measuring a ruler; 42. a card slot; 43. an expansion joint; 200. a hydraulic spring operating mechanism; 201. a pressure relief handle; 202. a hydraulic travel switch contact; 203. a support ring; 204. a piston cylinder.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 and 2, an embodiment of the present invention provides an energy storage displacement measurement apparatus, which is applied to a hydraulic spring operating mechanism 200, and includes a housing 1, and a pressure relief assembly 2, an indication assembly 3 and a displacement measurement assembly 4 which are arranged on the housing 1, where the pressure relief assembly 2 is connected to a pressure relief handle 201 of the hydraulic spring operating mechanism 200, and is used for lifting the pressure relief handle 201; the indicating assembly 3 is connected to a plurality of oil pressure travel switch contacts 202 of the hydraulic spring operating mechanism 200 and is used for sending out indicating information when the oil pressure travel switch contacts 202 are in a specified action state; the displacement measuring assembly 4 is connected to the support ring 203 of the hydraulic spring operating mechanism 200 and is used for measuring the displacement between the support ring 203 and the piston cylinder 204 of the hydraulic spring operating mechanism 200 so as to obtain the energy storage displacement of each oil pressure travel switch contact 202 corresponding to each indication message.
In the embodiment of the invention, the energy storage displacement measuring device is formed by arranging the pressure relief assembly 2, the indicating assembly 3 and the displacement measuring assembly 4 on the shell 1, referring to fig. 2 and 4, the pressure relief assembly 2 is connected with the pressure relief handle 201 of the hydraulic spring operating mechanism 200, and the pressure relief assembly 2 is used for lifting the pressure relief handle 201, so that hydraulic energy stored in an energy accumulator of the hydraulic spring operating mechanism 200 can be relieved at a constant speed and converted into uniform and regular displacement change between the support ring 203 and the piston cylinder 204; the indicating component 3 is connected to the plurality of oil pressure travel switch contacts 202 of the hydraulic spring operating mechanism 200, and is used for sending out indicating information when the oil pressure travel switch contacts 202 are in a specified action state, so that the action of lifting the pressure relief handle 201 is stopped when the oil pressure travel switch contacts 202 are in the specified action state, the pressure relief handle 201 is prevented from continuing to act and missing the specified action state of the oil pressure travel switch contacts 202, and the risk of re-measurement operation is reduced; the displacement measuring assembly 4 is connected to the support ring 203 of the hydraulic spring operating mechanism 200, and is configured to measure a displacement between the support ring 203 and the piston cylinder 204 of the hydraulic spring operating mechanism 200, so as to obtain an energy storage displacement of each oil pressure travel switch contact 202 corresponding to each indication information, for example, record a corresponding measurement value when each oil pressure travel switch contact 202 is in a specified action state, and finally subtract the measurement value when the hydraulic spring operating mechanism 200 is in a complete pressure relief state, so as to obtain the energy storage displacement of each oil pressure travel switch contact 202. The hydraulic pressure of the hydraulic spring actuator 200 at each of the hydraulic travel switch contacts 202 can be obtained from a comparison of the measured actual stored energy displacement with the standard stored energy displacement, and the operating condition of the hydraulic spring actuator 200 can be determined. According to the embodiment of the invention, the pressure relief handle 201 is stably lifted through the pressure relief component 2, so that the phenomenon that the piston cylinder 204 is relieved with an unstable manual lifting mode to miss the specified action state of the oil pressure travel switch contact 202 is avoided, and the accuracy of the measurement result is improved; on the other hand, the indication component 3 is arranged to remind an operator of the specified action state of the oil pressure travel switch contact 202, so that the operator can directly obtain the energy storage displacement of the oil pressure travel switch contact 202 when acquiring the indication information sent by the indication component 3, the operation difficulty is reduced, and the measurement accuracy and the measurement efficiency are also improved.
In one embodiment, referring to fig. 3, the pressure relief assembly 2 comprises a support structure 21 for supporting the pressure relief handle 201, and a lifting structure 22 connected to the support structure 21, the lifting structure 22 being adapted to lift the support structure 21 by a number of unit heights, the number of unit heights corresponding to the telescoping rate of the relative telescoping displacement between the support ring 203 and the piston cylinder 204, the higher the number of unit heights, the higher the telescoping rate of the relative telescoping displacement between the support ring 203 and the piston cylinder 204. The embodiment determines the telescopic speed of the relative telescopic displacement between the support ring 203 and the piston cylinder 204 through the unit height number of the lifting structure 22, and when the unit height number of the lifting structure 22 is not changed, the telescopic speed of the relative telescopic displacement between the support ring 203 and the piston cylinder 204 is constant, so that the time regularity of the specified action state switched by the oil pressure travel switch contact 202 can be ensured, and the operation difficulty is reduced and the measurement accuracy is improved.
Further, with reference to fig. 3, the lifting structure 22 includes a lifting seat 221 fixed on the housing 1, and a screw 222 movably connected to the lifting seat 221, the screw 222 is fixedly connected to the supporting structure 21, a threaded hole is concavely formed on a side surface of the lifting seat 221 close to the supporting structure 21, and the screw 222 is in threaded fit connection with the threaded hole. The embodiment can drive the screw rod 222 fixedly connected with the supporting structure 21 to rotate relative to the lifting seat 221, and the unit height of the lifting structure 22 is determined according to the number of rotation turns, so that the expansion and contraction rate of the relative expansion and contraction displacement between the supporting ring 203 and the piston cylinder 204 is determined.
After the position of the supporting structure 21 relative to the screw rod 222 is determined, if the pressure of the pressure relief handle 201 on the supporting structure 21 is not enough to fasten the supporting structure 21 on the screw rod 222, in a preferred embodiment, with continued reference to fig. 3, the lifting seat 221 is provided with a locking mechanism 223, and the locking mechanism 223 is used for locking the position of the screw rod 222 relative to the lifting seat 221, so that the situation that the screw rod 222 slides relative to the lifting seat 221 after the position of the supporting structure 21 relative to the screw rod 222 is determined can be avoided, and the dependence on the manual maintenance of the stability of the supporting structure 21 by an operator can also be reduced.
In another embodiment, referring to fig. 1, the indicating assembly 3 includes a plurality of indicating modules 31 fixed on the housing 1, and a conducting wire 32 having one end connected to the indicating module 31 and the other end connected to the hydraulic travel switch contact 202, each indicating module 31 corresponds to one hydraulic travel switch contact 202, each hydraulic travel switch contact 202 is conducted when in a specified action state, and the indicating module 31 corresponding to the conducted hydraulic travel switch contact 202 sends indicating information to remind an operator that the hydraulic travel switch contact 202 is in the specified action state, so as to measure the energy storage displacement at that time.
Preferably, the indication module 31 includes an indication lamp module, or an audible alarm module, or both. The oil pressure travel switch contact 202 can be reminded of being in the appointed action state by an indicator light module to send out a warning light signal when the oil pressure travel switch contact 202 is in the appointed action state, or by a sound alarm module to send out a sound alarm signal when the oil pressure travel switch contact 202 is in the appointed action state, or by an indicator light module to send out a warning light signal when the oil pressure travel switch contact 202 is in the appointed action state and by a sound alarm module to send out a sound alarm signal when the oil pressure travel switch contact 202 is in the appointed action state, so that an operator is reminded of the fact that the oil pressure travel switch contact 202 is in the appointed action state, and the energy storage displacement at the moment can be measured.
In another preferred embodiment, referring to fig. 3, the indicating assembly 3 further includes a coil seat 33 disposed at a connection position of the wire 32 and the housing 1, wherein the coil seat 33 is used for winding the wire 32, so that the wire 32 can be prevented from being scattered and knotted, and maintenance of the energy storage displacement measuring device can be reduced.
In addition, referring to fig. 1, the displacement measuring assembly 4 includes a measuring tape 41, and a slot 42 connected to the measuring tape 41, the slot 42 is disposed in the housing 1, the measuring tape 41 can move relative to a guide groove of the slot 42, and the slot 42 can accommodate the measuring tape 41, thereby functioning to accommodate the measuring tape 41.
Further, with continued reference to fig. 1, a telescopic joint 43 is disposed at a connection position of the measuring tape 41 and the slot 42, the measuring tape 41 can move telescopically relative to the telescopic joint 43 or rotate relative to a central axis of the telescopic joint 43, and the measuring tape 41 can be extended or rotated, so that the stored energy displacement measuring device of the embodiment can measure the stored energy displacement of the hydraulic spring operating mechanism 200 at multiple positions or multiple angles.
In another preferred embodiment, the measuring tape 41 is made of a magnetic material, one end of the measuring tape 41 can be firmly attached to the supporting ring 203, and the other end of the measuring tape 41 is parallel to the surface of the piston cylinder 204, so that when the energy storage displacement measuring device of the embodiment of the invention is used for performing a constant pressure relief process on the hydraulic spring operating mechanism 200, the measured value on the measuring tape 41 can be stably recorded through the magnetic attraction force of the measuring tape 41 and the supporting ring 203.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in a descriptive sense or a positional relationship based on the orientation shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (9)
1. An energy storage displacement measuring device is applied to a hydraulic spring operating mechanism and is characterized by comprising a shell, and a pressure relief assembly, an indicating assembly and a displacement measuring assembly which are arranged on the shell, wherein the pressure relief assembly is connected with a pressure relief handle of the hydraulic spring operating mechanism and used for lifting the pressure relief handle; the indicating assembly is connected to a plurality of oil pressure travel switch contacts of the hydraulic spring operating mechanism and used for sending out indicating information when the oil pressure travel switch contacts are in a specified action state; the displacement measuring assembly is connected to a support ring of the hydraulic spring operating mechanism and used for measuring displacement between the support ring and a piston cylinder of the hydraulic spring operating mechanism so as to obtain energy storage displacement of each oil pressure travel switch contact corresponding to each piece of indication information;
the pressure release subassembly is including being used for supporting the bearing structure of pressure release handle, and connect bearing structure's lifting structure, the lifting structure is used for with the lifting of a plurality of unit height bearing structure, the quantity of unit height corresponds the support ring with the flexible rate of relative flexible displacement between the piston cylinder.
2. The energy storage displacement measuring device of claim 1, wherein the lifting structure comprises a lifting seat fixed on the housing, and a screw movably connected with the lifting seat, the screw is fixedly connected with the supporting structure, a threaded hole is concavely formed in one side surface of the lifting seat close to the supporting structure, and the screw is in threaded fit connection with the threaded hole.
3. The energy storage displacement measuring device of claim 2, wherein the lifting seat is provided with a locking mechanism for locking the position of the screw relative to the lifting seat.
4. The energy storage displacement measuring device of claim 1, wherein the indicating assembly comprises a plurality of indicating modules fixed to the housing, and a conducting wire having one end connected to the indicating modules and the other end connected to the hydraulic travel switch contacts, each of the indicating modules corresponds to one of the hydraulic travel switch contacts, each of the hydraulic travel switch contacts is turned on when in a predetermined operating state, and the indicating module corresponding to the turned-on hydraulic travel switch contact sends an indicating message.
5. The energy storing displacement measuring device of claim 4, wherein the indicating module comprises an indicator light module and/or an audible alarm module.
6. The energy storing displacement measuring device of claim 4, wherein the indicating assembly further comprises a coil holder disposed at a junction of the wire and the housing, the coil holder configured to wind the wire.
7. The energy storage displacement measuring device of claim 1, wherein the displacement measuring assembly comprises a measuring tape and a slot coupled to the measuring tape, the slot being disposed within the housing, the measuring tape being movable relative to a guide slot of the slot, and the slot being capable of receiving the measuring tape.
8. The energy storage displacement measuring device of claim 7, wherein a telescopic joint is arranged at a connection of the measuring tape and the clamping groove, and the measuring tape can move telescopically relative to the telescopic joint or rotate relative to a central shaft of the telescopic joint.
9. The stored energy displacement measurement device of claim 7, wherein the measuring tape is made of a magnetic material.
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| CN202010351028.5A CN111521381B (en) | 2020-04-28 | 2020-04-28 | Energy storage displacement measuring device |
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| CN202010351028.5A CN111521381B (en) | 2020-04-28 | 2020-04-28 | Energy storage displacement measuring device |
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| CN112857761B (en) * | 2020-12-29 | 2023-06-27 | 国网江苏省电力有限公司检修分公司 | Intelligent checking instrument and checking method for pressure node of hydraulic spring mechanism of circuit breaker |
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| CN101915564A (en) * | 2010-07-07 | 2010-12-15 | 江南大学 | Automatic inspection system of truck tank |
| CN105698728A (en) * | 2016-03-31 | 2016-06-22 | 合肥通用机械研究院 | Safety valve detecting tool |
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| US4664196A (en) * | 1985-10-28 | 1987-05-12 | Halliburton Company | Downhole tool with compressible liquid spring chamber |
| ATE138832T1 (en) * | 1990-11-12 | 1996-06-15 | Fcb | MILL FOR FINE GRINDING MATERIALS |
| CN102012343B (en) * | 2009-03-06 | 2012-05-30 | 兰州大学 | Hydraulic supporting body for direct tensile test device |
| CN102033019A (en) * | 2010-11-11 | 2011-04-27 | 无锡昌华机电制造有限公司 | Automatic hydrostatic test control system using air-bottle outer measuring method |
| US8857757B2 (en) * | 2012-08-02 | 2014-10-14 | Bell Helicopter Textron Inc. | Independent blade control system with hydraulic pitch link |
| CN110243500B (en) * | 2019-07-03 | 2021-03-05 | 国家电网有限公司 | Hydraulic mechanism pressure node detection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915564A (en) * | 2010-07-07 | 2010-12-15 | 江南大学 | Automatic inspection system of truck tank |
| CN105698728A (en) * | 2016-03-31 | 2016-06-22 | 合肥通用机械研究院 | Safety valve detecting tool |
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