CN207231340U - A kind of device for the swollen measurement of cylinder of steam turbine - Google Patents
A kind of device for the swollen measurement of cylinder of steam turbine Download PDFInfo
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- CN207231340U CN207231340U CN201721170364.XU CN201721170364U CN207231340U CN 207231340 U CN207231340 U CN 207231340U CN 201721170364 U CN201721170364 U CN 201721170364U CN 207231340 U CN207231340 U CN 207231340U
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- indicating arm
- cylinder
- steam turbine
- swollen
- measurement
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Abstract
It the utility model is related to a kind of device for the swollen measurement of cylinder of steam turbine, the device includes hold-down support, is plugged in hold-down support one end and along the indicating arm that hold-down support axial reciprocating moves and can be removably disposed in the buffer head of instruction boom end, is equipped with scale marker along indicating arm length direction on indicating arm.Compared with prior art, the utility model uses pure mechanic structure, by the swollen displacement for being converted into indicating arm of the cylinder of steam turbine, and the swollen value of cylinder can be quickly obtained by visual reading, measurement result is accurately quick, easy to operate；Situations such as every time during measurement, indicating arm is pulled out hold-down support, and does not need to carry out periodic check and maintenance, and the measurement error increase after long-time Reusability is not present, ensure that the reliability of measurement result；It is small, it is simple in structure, use is easily installed, almost the cylinder of measurable any position is swollen, has a wide range of application.
Description
Technical field
The utility model belongs to steam turbine technology field, is related to a kind of device for the swollen measurement of cylinder of steam turbine.
Background technology
The cylinder of steam turbine is swollen to refer to the absolute expansion of steam turbine, i.e., cylinder steam turbine start and operational process in produce
Raw thermal expansion.During the work time, cylinder, rotor and other components can be heated steam turbine, make cylinder expanded by heating.In order to
Determine whether the thermal expansion of cylinder exceedes preset value, it is necessary to which swollen to cylinder be monitored.
At present, generally use absolute expansion sensor is swollen to cylinder measures, and sensors with auxiliary electrode uses intermediate frequency displacement sensing
Device is typically mounted on the fixture being oppositely arranged with cylinder, to monitor cylinder relative to the swollen of fixture as sensing element
Swollen information, and then determine whether the thermal expansion of cylinder exceedes preset value.But sensors with auxiliary electrode can go out after long-time Reusability
The situation that existing measurement error increase, measurement data are not allowed is, it is necessary to carry out periodic check, if not verified, measurement result is not
Reliably；If frequently verification, operates excessively complexity, and seriously affected measurement efficiency.
Utility model content
The purpose of this utility model is exactly to be provided a kind of easily operated to overcome the problems of the above-mentioned prior art
And the device for the swollen measurement of cylinder of steam turbine that measurement accuracy is good.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of device for the swollen measurement of cylinder of steam turbine, the device include hold-down support, are plugged in hold-down support one end simultaneously
Can along the indicating arm that hold-down support axial reciprocating moves and be removably disposed in instruction boom end buffer head, the finger
Show and be equipped with scale marker along indicating arm length direction on bar.Hold-down support is installed at position to be measured, buffer head is against cylinder
On outer wall, after cylinder expanded by heating, casing outer wall compressing buffer head, and drive indicating arm to be moved to hold-down support inside；When
During maximum that cylinder is swollen, respective value is read it can be learnt that the swollen value of cylinder by scale marker.
As preferable technical solution, the hold-down support is cylindrical.
Indicating arm sliding channel is provided in the axial direction with the hold-down support, one end of the indicating arm is equipped with buffering
Head, the other end are slidably arranged in indicating arm sliding channel.
The distance between inner wall and indicating arm outer wall of the indicating arm sliding channel are 0.015-0.025mm.Instruction
The gap assembly method of pure mechanic structure is used between bar and hold-down support, not only can guarantee that the smooth slip of indicating arm, but also have
Certain clamp force, enables indicating arm to be maintained at relevant position on hold-down support in the case of not adding external force or external force less,
Ensure the accuracy of measurement result.
Guide ridges are equipped with along indicating arm length direction on the outer wall of the indicating arm, the indicating arm sliding channel
The guide groove being adapted with guide ridges is offered on inner wall.Guide ridges are slidably arranged in guide groove, when indicating arm is along fixed
During seat axial reciprocating movement, in order to avoid indicating arm rotates, ensure that scale marker is in the position of easy reading, pass through guide ridges
With the cooperation of guide groove, the rotation of indicating arm is limited, makes indicating arm can only be axially movable.
The outside diameter of the buffer head is more than the internal diameter of indicating arm sliding channel.Slided when indicating arm fully enters indicating arm
After in passage, buffer head can carry out spacing.
It is detachably connected between the buffer head and indicating arm using thread connecting mode.So as to according to be actually needed more
Change buffer head.
The buffer head is hard plastic buffer head.Hard plastic buffer head both has certain toughness, avoids casing outer wall with delaying
Punch rigid contact causes to damage, while also has certain resistance to elevated temperatures, ensures the reliability of measurement result.
As preferable technical solution, the material of the indicating arm and hold-down support is stainless steel.
The scale marker includes multiple along the uniformly distributed graduation mark on indicating arm outer wall of indicating arm length direction
And with the corresponding scale value of graduation mark.Corresponding scale value is labeled with every graduation mark, by reading scale value
Number, you can quickly learn the swollen value of cylinder, and do not need to carry out complicated conversion.
The end of the hold-down support offers screw hole.Easy to which hold-down support is installed on by bolted connection
Predetermined position.
The utility model by hold-down support by bolt in practical application, be installed on predetermined position, and pull out instruction
Bar, makes buffer head be against on casing outer wall, writes down scale value at this time；After cylinder expanded by heating, slowly compressing is slow for casing outer wall
Punch, and drive indicating arm to be moved to hold-down support inside；When cylinder is swollen maximum, indicating arm stop motion, then write down this moment
Angle value, you can the swollen value of cylinder is learnt by the difference of scale value twice.
Compared with prior art, the utility model has the characteristics that：
1) pure mechanic structure is used, by the swollen displacement for being converted into indicating arm of the cylinder of steam turbine, and can be fast by visual reading
Speed obtains the swollen value of cylinder, and measurement result is accurately quick, easy to operate；
2) when measuring every time, indicating arm is pulled out into hold-down support, and does not need to carry out periodic check and maintenance, and is not deposited
Situations such as measurement error after long-time Reusability increases, ensure that the reliability of measurement result；
3) it is small, it is simple in structure, use is easily installed, almost the cylinder of measurable any position is swollen, has a wide range of application.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model；
Description of symbols in figure：
1-buffer head, 2-indicating arm, 3-hold-down support, 4-scale marker, 5-guide ridges.
Embodiment
The utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with the utility model
Implemented premised on technical solution, give detailed embodiment and specific operating process, but the guarantor of the utility model
Shield scope is not limited to following embodiments.
Embodiment 1：
A kind of device for the swollen measurement of cylinder of steam turbine as shown in Figure 1, the device include hold-down support 3, are plugged in admittedly
Determining 3 one end of bearing simultaneously along the indicating arm 2 that 3 axial reciprocating of hold-down support moves and can be removably disposed in 2 end of indicating arm
Buffer head 1, be equipped with scale marker 4 along 2 length direction of indicating arm on indicating arm 2.
Wherein, indicating arm sliding channel is provided in the axial direction with hold-down support 3, one end of indicating arm 2 is equipped with buffer head 1,
The other end is slidably arranged in indicating arm sliding channel.The distance between inner wall and 2 outer wall of indicating arm of indicating arm sliding channel
For 0.02mm.Guide ridges 5 are equipped with along 2 length direction of indicating arm on the outer wall of indicating arm 2, are opened on the inner wall of indicating arm sliding channel
Equipped with the guide groove being adapted with guide ridges 5.The outside diameter of buffer head 1 is more than the internal diameter of indicating arm sliding channel.
It is detachably connected between buffer head 1 and indicating arm 2 using thread connecting mode.Buffer head 1 is hard plastic buffer head.Carve
Scale know 4 include it is multiple along the uniformly distributed graduation mark on 2 outer wall of indicating arm of 2 length direction of indicating arm and with graduation mark phase
Corresponding scale value.The end of hold-down support 3 offers screw hole.
In practical application, hold-down support 3 is installed on predetermined position by bolt, and indicating arm 2 is pulled out, make buffering
First 1 is against on casing outer wall, writes down scale value at this time；After cylinder expanded by heating, casing outer wall slowly oppresses buffer head 1, and
Indicating arm 2 is driven to moving inside hold-down support 3；When cylinder is swollen maximum, 2 stop motion of indicating arm, then scale value at this time is write down,
The swollen value of cylinder can be learnt by the difference of scale value twice.
Embodiment 2：
In the present embodiment, the distance between inner wall and 2 outer wall of indicating arm of indicating arm sliding channel are 0.015mm, remaining
With embodiment 1.
Embodiment 3：
In the present embodiment, the distance between inner wall and 2 outer wall of indicating arm of indicating arm sliding channel are 0.025mm, remaining
With embodiment 1.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using practicality
It is new.Person skilled in the art obviously easily can make these embodiments various modifications, and illustrating herein
General Principle be applied in other embodiment without by performing creative labour.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model category made and
Modification all should be within the scope of protection of the utility model.
Claims (9)
1. a kind of device for the swollen measurement of cylinder of steam turbine, it is characterised in that the device includes hold-down support (3), is plugged in admittedly
Determine bearing (3) one end simultaneously can along hold-down support (3) axial reciprocating move indicating arm (2) and be removably disposed in indicating arm
(2) buffer head (1) of end, is equipped with scale marker (4) on the indicating arm (2) along indicating arm (2) length direction.
A kind of 2. device for the swollen measurement of cylinder of steam turbine according to claim 1, it is characterised in that the fixed branch
Indicating arm sliding channel is provided in the axial direction with seat (3), one end of the indicating arm (2) is equipped with buffer head (1), and the other end is slided
It is dynamic to be arranged in indicating arm sliding channel.
A kind of 3. device for the swollen measurement of cylinder of steam turbine according to claim 2, it is characterised in that the indicating arm
The distance between inner wall and indicating arm (2) outer wall of sliding channel are 0.015-0.025mm.
A kind of 4. device for the swollen measurement of cylinder of steam turbine according to claim 2, it is characterised in that the indicating arm
(2) guide ridges (5) are equipped with along indicating arm (2) length direction on outer wall, are opened up on the inner wall of the indicating arm sliding channel
There is the guide groove being adapted with guide ridges (5).
A kind of 5. device for the swollen measurement of cylinder of steam turbine according to claim 2, it is characterised in that the buffer head
(1) outside diameter is more than the internal diameter of indicating arm sliding channel.
A kind of 6. device for the swollen measurement of cylinder of steam turbine according to claim 1, it is characterised in that the buffer head
(1) it is detachably connected between indicating arm (2) using thread connecting mode.
A kind of 7. device for the swollen measurement of cylinder of steam turbine according to claim 1, it is characterised in that the buffer head
(1) it is hard plastic buffer head.
A kind of 8. device for the swollen measurement of cylinder of steam turbine according to claim 1, it is characterised in that the graduated scale
(4) are known including multiple along the uniformly distributed graduation mark and and graduation mark on indicating arm (2) outer wall of indicating arm (2) length direction
Corresponding scale value.
A kind of 9. device for the swollen measurement of cylinder of steam turbine according to claim 1, it is characterised in that the fixed branch
The end of seat (3) offers screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721170364.XU CN207231340U (en) | 2017-09-13 | 2017-09-13 | A kind of device for the swollen measurement of cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721170364.XU CN207231340U (en) | 2017-09-13 | 2017-09-13 | A kind of device for the swollen measurement of cylinder of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207231340U true CN207231340U (en) | 2018-04-13 |
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ID=61861813
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721170364.XU Active CN207231340U (en) | 2017-09-13 | 2017-09-13 | A kind of device for the swollen measurement of cylinder of steam turbine |
Country Status (1)
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| CN (1) | CN207231340U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111059976A (en) * | 2019-12-12 | 2020-04-24 | 福建福清核电有限公司 | Measurement error correction method for nuclear power plant steam turbine differential expansion sensor |
-
2017
- 2017-09-13 CN CN201721170364.XU patent/CN207231340U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111059976A (en) * | 2019-12-12 | 2020-04-24 | 福建福清核电有限公司 | Measurement error correction method for nuclear power plant steam turbine differential expansion sensor |
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