CN112284494A - High accuracy boiler liquid level detector - Google Patents
High accuracy boiler liquid level detector Download PDFInfo
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- CN112284494A CN112284494A CN202011172261.3A CN202011172261A CN112284494A CN 112284494 A CN112284494 A CN 112284494A CN 202011172261 A CN202011172261 A CN 202011172261A CN 112284494 A CN112284494 A CN 112284494A
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- Prior art keywords
- detector
- level detector
- boiler
- frame
- water level
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- 239000007788 liquid Substances 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000007667 floating Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 13
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000011521 glass Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 210000003275 diaphysis Anatomy 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
- G01F23/76—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats characterised by the construction of the float
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention relates to the technical field of high-temperature and high-pressure boiler liquid level detection, in particular to a high-precision boiler liquid level detector which comprises a detector, wherein the detector is erected on a boiler, a supporting frame plate is arranged on the detector and is arranged at the top of a water storage cavity of the boiler, a primary water level detector and a secondary water level detector are respectively arranged on the supporting frame plate, a mounting base is erected in the primary water level detector, a steering roller shaft is arranged on the mounting base, a steering frame is erected outside the steering roller shaft, a lower edge rod piece is arranged at the bottom end of the steering frame, a first floating ball is arranged at the bottom end of the lower edge rod piece, an infrared detector is arranged at the top of the secondary water level detector, a folding connecting frame is arranged at the bottom end of the top frame, a lower straight rod is. This application design has one-level water level detection appearance and second grade water level detection appearance to carry out mutual correction, the supplementary boiler liquid level position of examining both sides.
Description
Technical Field
The invention relates to the technical field of high-temperature and high-pressure boiler liquid level detection, in particular to a high-precision boiler liquid level detector.
Background
The existing boiler liquid level detector comprises a pipeline communicated with the upper end and the lower end of a boiler, a meter body is connected on the pipeline, a plurality of sight glass bodies are longitudinally and correspondingly arranged on two sides of the meter body, a graphite sealing gasket is arranged at the upper end of a sight glass, a graphite sealing gasket and a mica sheet are arranged at the lower end of the sight glass, the sight glass bodies, the graphite sealing gasket, the mica sheet and the sight glass are pressed in the meter body together, and the sight glass bodies are welded with the end part of the meter body; the press-fitting force is too small, the sealing is not tight, and the sight glass is easy to be subjected to cavitation; the mica sheets are often damaged by crushing; the Chinese patent (No. CN 2490559Y) discloses a boiler liquid level detector, wherein a floating ball is arranged in the center hole of a meter body, when the boiler liquid level rises or falls, the floating ball rises or falls along with the liquid level, so that the boiler liquid level detector can visually and clearly display through sight glasses arranged at different heights of the meter body, therefore, the liquid level is easy to observe, the detection effect is good, and because a sealing stop pad is arranged at the lower end of the sight glass, the sight glass body is in threaded connection with the meter body, and the upper sight glass body and the lower sight glass body are in threaded connection; however, the actual operation of the patent has certain technical defects, and how to accurately detect the position of the floating ball is guaranteed although the liquid level of the floating ball rises or falls; the visual detection mode is adopted, and the method is very inaccurate.
Disclosure of Invention
The invention aims to provide a high-precision boiler liquid level detector to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-precision boiler liquid level detector comprises a detector, wherein the detector is erected on a boiler, a supporting frame plate is arranged on the detector and is arranged at the top of a water storage cavity of the boiler, a primary water level detector and a secondary water level detector are respectively arranged on the supporting frame plate, a mounting base is erected in the primary water level detector, a supporting frame is arranged on the mounting base, clamping frames are arranged on the front side and the rear side of the supporting frame, a steering roller shaft is arranged on each clamping frame, a steering frame is erected outside the steering roller shaft, a lower edge rod piece is arranged at the bottom end of the steering frame, a first floating ball is arranged at the bottom end of the lower edge rod piece, an angle detection pointer is externally connected with the steering roller shaft, a data sensor is externally connected with the angle detection pointer, and an infrared detector is arranged at the top of the secondary water, the infrared detector inner chamber top sets up and is provided with the roof-rack, the top of roof-rack is provided with infrared ray head, folding joint frame is installed to the roof-rack bottom, folding joint frame's bottom is provided with down the straight-bar, the second floater is installed to the bottom of straight-bar down, folding joint frame comprises a plurality of ways of diamond-shaped support, and diamond-shaped support includes a plurality of ways diaphysis, is connected through the activity bolt between the vertical diaphysis, and the fixed block is installed through the gim peg at the top of diaphysis, fixed block department is provided with the laser node.
As a further scheme of the invention: the adjacent rhombic brackets are mutually independent and do not generate force transmission.
As a further scheme of the invention: the bottom of roof-rack is provided with a protection section of thick bamboo, folding link wholly wears to establish in a protection section of thick bamboo.
As a further scheme of the invention: the infrared ray head and the lower straight rod are positioned on the same vertical line.
As a further scheme of the invention: the closing of adjacent laser nodes after contact is taken as a further scheme of the invention: the steering roll shaft is further provided with a transmission gear, the primary water level detector is further provided with a driven gear, the driven gear is meshed with the transmission gear, a wheel disc shaft is mounted at the axis of a wheel shaft of the driven gear, and the wheel disc shaft is externally connected with an automatic water replenishing valve.
As a further scheme of the invention: the first floating ball and the second floating ball are assembled by corresponding hollow hemispheres, and the adjacent hollow hemispheres are locked by a closing bolt.
As a still further scheme of the invention: a cross-shaped support is arranged in the hollow hemisphere, and an inner ball net is arranged between the cross-shaped support and the inner spherical surface of the hollow hemisphere.
Compared with the prior art, the invention has the beneficial effects that:
the first-stage water level detector and the second-stage water level detector are designed to carry out mutual correction, and the liquid level positions of the boilers on two sides are checked in an auxiliary mode.
The first-level water level detector adopts a steering mechanism principle, the first floating ball moves to drive the lower rod to rotate, then the steering roller shaft is driven to move, the steering roller shaft is externally connected with an angle detection pointer, and the angle of steering is measured to check the horizontal liquid level position of one side.
The second grade water level detector adopts infrared laser to detect the principle, in order to prevent that fog from interfering to infrared ray's detection, this application still further will have the segmentation to detect, when lower straight-bar moves up or moves down, conduction rhombus support warp promptly, the rhombus support short distance of deformation position can be measured to adjacent laser node, and the rhombus support is folding closed completely after, after upper and lower laser node laminating, its contact is closed, so whole horizontally height is not the laser node interval of the rhombus support of closed rhombus support quantity x fixed rhombus support distance + current deformation. And then the position of the horizontal liquid level on the other side is checked.
Secondly, a gear transmission device is further arranged at the first-stage water level detector to drive a driven gear to move, so that an automatic water replenishing valve is externally connected; the transmission gear is driven to move due to the rise or the fall of the liquid level, and then the gear is meshed with the driving wheel disc shaft, so that the automatic water replenishing valve is regulated and controlled, and can be simultaneously matched with automatic water replenishing regulation operation.
In view of the fact that the floating ball is in a high-temperature environment, the risk that the surface is shriveled and dented is likely to occur, the cross-shaped support is arranged in the hollow hemisphere, and the inner support structure is arranged on an inner ball net, so that the risk that the surface of the ball is shriveled and dented is prevented.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application; also, the drawings and the description are not intended to limit the scope of the present concepts in any way, but rather to illustrate the concepts of the present disclosure to those skilled in the art by reference to specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of a first stage water level detecting apparatus according to the present invention.
FIG. 3 is a schematic structural view of a two-stage water level detector according to the present invention.
Fig. 4 is a schematic structural view of a diamond stent according to the present invention.
FIG. 5 is a schematic view of the structure of the floating ball of the present invention.
In the figure: 1-boiler, 11-detector, 12-support frame plate, 13-water storage cavity, 2-first level water level detector, 21-mounting base, 22-support frame, 23-clamping frame, 24-steering roll shaft, 25-transmission gear, 26-steering frame, 27-lower edge rod piece, 28-first floating ball, 31-driven gear, 32-wheel disc shaft, 4-second level water level detector, 41-infrared detector, 42-top frame, 43-infrared ray head, 44-protective cylinder, 45-folding connecting frame, 46-diamond support, 47-lower straight rod, 48-second floating ball, 51-backbone, 52-movable bolt, 53-positioning bolt, 54-fixed block, 55-laser node, 61-hollow hemisphere, etc, 62-closing bolt, 63-cross-shaped bracket and 64-inner net.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, and when the following description refers to the accompanying drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.
It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-4, a high precision boiler liquid level detector includes a detector 11, the detector 11 is mounted on a boiler 1, the detector 11 is provided with a support frame plate 12, the support frame plate 12 is arranged at the top of a water storage cavity 13 of the boiler, the support frame plate 12 is respectively provided with a primary water level detector 2 and a secondary water level detector 4, a mounting base 21 is erected in the first-level water level detector 2, a supporting frame 22 is arranged on the mounting base 21, the front side and the rear side of the supporting frame 22 are provided with clamping frames 23, the clamping frames 23 are provided with steering roll shafts 24, the outer frame of the steering roll shaft 24 is provided with a steering frame 26, the bottom end of the steering frame 26 is provided with a lower edge rod piece 27, a first floating ball 28 is mounted at the bottom end of the lower edge rod member 27, an angle detection pointer is externally connected to the steering roller shaft 24, and a data sensor is externally connected to the angle detection pointer.
The top of second grade water level detector 4 is provided with infrared detector 41, the setting of infrared detector 41 inner chamber top is provided with roof-rack 42, the top of roof-rack 42 is provided with infrared ray head 43, folding joint frame 45 is installed to roof-rack 42 bottom, the bottom of roof-rack 42 is provided with a protection section of thick bamboo 44, folding joint frame 45 wholly wears to establish in protection section of thick bamboo 44, folding joint frame 45's bottom is provided with down straight-bar 47, second floater 48 is installed to the bottom of straight-bar 47 down, infrared ray head 43 is located same vertical line with down straight-bar 47.
The folding connecting frame 45 is composed of a plurality of diamond-shaped supports 46, each diamond-shaped support 46 comprises a plurality of backbones 51, the vertical backbones are connected through a movable bolt 52, the top of each backbone 51 is provided with a fixing block 54 through a positioning bolt 53, laser nodes 55 are arranged at the positions of the fixing blocks 54, the adjacent laser nodes 55 are closed after being contacted, and the adjacent diamond-shaped supports 46 are independent from each other and do not generate force transmission.
The working principle of the invention is as follows: the method is characterized in that a primary water level detector 2 and a secondary water level detector 4 are designed to perform mutual correction to assist in checking the boiler liquid level positions on two sides; the bottom of one-level water level detector 2 is provided with first floater 28, and first floater 28 is installed on bogie 26 through following member 27 down, and the water level rises or descends and be, drives first floater 28 removal promptly, but first floater 28 is the fixed distance installation through following member 27 down, drives down along member 27 and rotates promptly, drives the motion of steering roller shaft 24 then, and steering roller shaft 24 is external to have the angle to detect the pointer, and then the horizontal liquid level position to the unilateral is examined through the angle of measuring the direction of turning to.
The second floating ball 48 is arranged at the bottom of the second-stage water level detector 4, when water liquid rises or falls, the lower straight rod 47 is driven to move, and the distance between the infrared ray head 43 at the top of the second-stage water level detector and the infrared ray of the lower straight rod 47 is changed; however, because high-temperature gas exists in the boiler and interference exists in detection of long-distance infrared rays, the design is further segmented, when the lower straight rod 47 moves up or down, the conductive diamond-shaped support 46 deforms, the top of the diamond-shaped support 46 is provided with a fixing block 54 through a positioning bolt 53, a laser node 55 is arranged at the fixing block 54, the short distance of the diamond-shaped support 46 at the deformation position can be measured through the adjacent laser node 55, after the diamond-shaped support 46 is completely folded and closed, the upper laser node 55 and the lower laser node 55 are attached and then contacted and closed, therefore, the overall horizontal height is equal to the number of the unclosed diamond-shaped supports 46, the distance between the fixed diamond-shaped supports 46 and the distance between the laser nodes 55 of the currently deformed diamond-shaped support 46, and the horizontal liquid level position of the other side is checked.
Example two:
referring to fig. 2, this embodiment is further optimized as an embodiment, on the basis of which a transmission gear 25 is further installed on a steering roller shaft 24, a driven gear 31 is further installed at the primary water level detector 2, the driven gear 31 is engaged with the transmission gear 25, a wheel disc shaft 32 is installed at a wheel shaft axis of the driven gear 31, and the wheel disc shaft 32 is externally connected with an automatic water replenishing valve.
In view of the fact that the boiler 1 always has an automatic water replenishing system, the first-level water level detector 2 is further provided with a gear transmission device to drive the driven gear 31 to move, so that the automatic water replenishing valve is externally connected; the transmission gear 25 is driven to move due to the rise or the fall of the liquid level, and then the automatic water replenishing valve is regulated and controlled by driving the wheel disc shaft 32 through gear engagement, and can be simultaneously matched with automatic regulation water replenishing operation.
Example three:
referring to fig. 5, the present embodiment is a further optimization of the embodiment, based on that, the first floating ball 28 and the second floating ball 48 are assembled by corresponding hollow hemispheres 61, adjacent hollow hemispheres 61 are locked by closing bolts 62, a cross-shaped bracket 63 is arranged in the hollow hemispheres 61, and an inner ball net 64 is arranged between the cross-shaped bracket 63 and the inner ball surface of the hollow hemispheres 61.
In view of the risk that the floating ball may be shriveled at high temperature, the cross-shaped bracket 63 is arranged in the hollow hemisphere 61 and is installed on the inner ball net 64 through an internal support structure, so that the risk of shriveling the ball surface is prevented.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that the present embodiments be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
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 combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a high accuracy boiler liquid level detector, includes detector (11), detector (11) are erect on boiler (1), be provided with support frame board (12) on detector (11), support frame board (12) set up the top in the water storage chamber (13) of boiler, be provided with one-level water level detector (2) and second grade water level detector (4) on support frame board (12) respectively, its characterized in that, one-level water level detector (2) inner tower is equipped with mounting base (21), be provided with support frame (22) on mounting base (21), both sides are provided with clamping frame (23) around support frame (22), install steering roller axle (24) on clamping frame (23), the outer frame of steering roller axle (24) has bogie (26), the bottom of bogie (26) is provided with down along member (27), a first floating ball (28) is installed at the bottom end of the lower edge rod piece (27), an angle detection pointer is externally connected to the steering roller shaft (24), a data sensor is externally connected to the angle detection pointer, an infrared detector (41) is arranged at the top of the secondary water level detector (4), an upper frame (42) is arranged at the top of an inner cavity of the infrared detector (41), an infrared ray head (43) is arranged at the top end of the upper frame (42), a folding connecting frame (45) is installed at the bottom end of the upper frame (42), a lower straight rod (47) is arranged at the bottom end of the folding connecting frame (45), a second floating ball (48) is installed at the bottom end of the lower straight rod (47), the folding connecting frame (45) is composed of a plurality of rhombic supports (46), each rhombic support (46) comprises a plurality of backbone (51), and the vertical backbones are connected through a movable bolt (52), the top of the backbone (51) is provided with a fixed block (54) through a positioning bolt (53), and a laser node (55) is arranged at the fixed block (54).
2. A high accuracy boiler level gauge according to claim 1, characterized in that no force transmission occurs between adjacent diamond shaped brackets (46) independently.
3. The high-precision boiler liquid level detector according to claim 1, wherein a protective cylinder (44) is arranged at the bottom of the top frame (42), and the folding connecting frame (45) is integrally arranged in the protective cylinder (44) in a penetrating manner.
4. A high accuracy boiler liquid level detector as claimed in claim 1, characterized in that the infrared ray head (43) and the lower straight rod (47) are located on the same vertical line.
5. A high accuracy boiler level gauge according to claim 1, characterized in that the closing occurs upon contact of adjacent laser nodes (55).
6. The high-precision boiler liquid level detector according to claim 1, wherein a transmission gear (25) is further mounted on the steering roller shaft (24), a driven gear (31) is further arranged at the primary water level detector (2), the driven gear (31) is meshed with the transmission gear (25), a wheel disc shaft (32) is mounted at the axle axis of the driven gear (31), and the wheel disc shaft (32) is externally connected with an automatic water replenishing valve.
7. The high precision boiler liquid level detector according to any one of claims 1-6, wherein the first floating ball (28) and the second floating ball (48) are assembled by corresponding hollow hemispheres (61), and adjacent hollow hemispheres (61) are locked by a closing bolt (62).
8. The high accuracy boiler liquid level detector according to claim 7, characterized in that a cross-shaped bracket (63) is provided in said hollow hemisphere (61), and an inner ball net (64) is provided between said cross-shaped bracket (63) and the inner spherical surface of said hollow hemisphere (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011172261.3A CN112284494A (en) | 2020-10-28 | 2020-10-28 | High accuracy boiler liquid level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011172261.3A CN112284494A (en) | 2020-10-28 | 2020-10-28 | High accuracy boiler liquid level detector |
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| Publication Number | Publication Date |
|---|---|
| CN112284494A true CN112284494A (en) | 2021-01-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011172261.3A Withdrawn CN112284494A (en) | 2020-10-28 | 2020-10-28 | High accuracy boiler liquid level detector |
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| Country | Link |
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| CN (1) | CN112284494A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587078A (en) * | 2021-08-03 | 2021-11-02 | 李武鹏 | Boiler liquid level detection device |
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2020
- 2020-10-28 CN CN202011172261.3A patent/CN112284494A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587078A (en) * | 2021-08-03 | 2021-11-02 | 李武鹏 | Boiler liquid level detection device |
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Application publication date: 20210129 |