CN113639930A - Endoscope detection system and endoscope for leakage of tower top low-temperature corrosion heat exchanger - Google Patents
Endoscope detection system and endoscope for leakage of tower top low-temperature corrosion heat exchanger Download PDFInfo
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- CN113639930A CN113639930A CN202110854246.5A CN202110854246A CN113639930A CN 113639930 A CN113639930 A CN 113639930A CN 202110854246 A CN202110854246 A CN 202110854246A CN 113639930 A CN113639930 A CN 113639930A
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- 238000001816 cooling Methods 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 229920001973 fluoroelastomer Polymers 0.000 claims description 18
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- 239000000523 sample Substances 0.000 claims description 12
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- 238000012545 processing Methods 0.000 claims description 8
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- 229910052731 fluorine Inorganic materials 0.000 description 6
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Classifications
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
Abstract
The invention discloses a leakage endoscope detection system of a tower top low-temperature corrosion heat exchanger and an endoscope, and the leakage endoscope detection system comprises a top plate and a cooling mechanism, wherein a pipe body is fixedly arranged at the bottom of the top plate, a groove is formed in the bottom of the pipe body, a first flat gasket is fixedly arranged at the top of the groove, a second flat gasket is fixedly arranged in an inner cavity of the groove and positioned at the top of the first flat gasket, the cooling mechanism comprises a shell, a first cooling coil and a second cooling coil are respectively arranged on two sides of the inner cavity of the shell, and one end of the first cooling coil penetrates through the shell and extends to the outside of the shell and is communicated with a first connecting pipe; according to the invention, the cooling mechanism is arranged, and absorbs heat, so that the purpose of internal circulation heat dissipation is achieved, and the heat dissipation effect is improved.
Description
Technical Field
The invention relates to the technical field of industrial endoscope equipment, in particular to an endoscope detection system for leakage of a tower top low-temperature corrosion heat exchanger and an endoscope.
Background
The endoscope inner leakage detection system is a system and a method for carrying out online monitoring on the inner leakage phenomenon in the crude oil refining process, and is mainly used for online monitoring of the inner leakage of a tower top heat exchanger.
The quantity of high-sulfur, high-acid and other poor crude oil processed by Chinese refineries is increased year by year, the processed crude oil is various and is frequently switched, and the low-temperature part on the top of the atmospheric and vacuum distillation unit is seriously corroded. Although a series of measures such as crude oil mixing, optimization of electric desalting operation, establishment of an ion balance model of a tower top system, timely adjustment of the adding amount and the water injection amount of a corrosion inhibitor and a neutralizing agent at the tower top, adoption of a latest corrosion online monitoring system, adoption of a coating or replacement of a high-grade material for an air cooler and a heat exchanger at a phase change part at the tower top and the like are adopted, the corrosion problem of a low-temperature part at the tower top cannot be solved well, the tower top heat exchanger still leaks frequently, and particularly in the latter half of each operation cycle, the heat exchanger leakage accident frequently occurs, and the safety, stability and long-cycle operation of a constant pressure and reduced pressure device is seriously threatened.
Particularly, if leakage occurs at the heat exchanger at the top of the atmospheric tower, crude oil can pollute naphtha, and further production accidents affecting the production of reforming units and ethylene units which take naphtha as raw materials occur, once pollution to catalysts of subsequent units is caused, serious harm is directly caused to the safety production and economic benefit of the whole petrochemical enterprise, and therefore the problem that the naphtha is polluted by the crude oil due to leakage in the heat exchanger must be found and treated in time.
At present, the refinery mostly adopts the mode that every team carries out the outside and patrols and examines, and whether this kind of mode can not know at any time and leak, especially in the later stage that a set of device ran to certain maintenance cycle, and the probability of heat exchanger corrosion leakage increases, can not accomplish in time monitoring and feedback at all.
Therefore, a system and a method for online monitoring the internal leakage phenomenon in the crude oil refining process for 24 hours in an efficient and accurate manner are needed, and once leakage occurs, feedback and alarm are made in time to control the problem of naphtha pollution from the source.
Disclosure of Invention
The invention aims to provide an endoscope detection system and an endoscope for leakage of a tower top low-temperature corrosion heat exchanger, which have the advantage of efficient heat dissipation and solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an endoscope comprises a top plate and a cooling mechanism, wherein a tube body is fixedly arranged at the bottom of the top plate, a groove is formed in the bottom of the tube body, a first flat gasket is fixedly arranged at the top of the groove, a second flat gasket is fixedly arranged at the top of an inner cavity of the groove, the cooling mechanism comprises a shell, a first cooling coil and a second cooling coil are respectively arranged on two sides of the inner cavity of the shell, one end of the first cooling coil penetrates through the shell and extends to the outside of the shell and is communicated with a first connecting pipe, the other end of the first cooling coil penetrates through the shell and extends to the outside of the shell and is communicated with a second connecting pipe, one end of the second cooling coil penetrates through the shell and extends to the outside of the shell and is communicated with a third connecting pipe, and the other end of the second cooling coil penetrates through the shell and extends to the outside of the shell and is communicated with a fourth connecting pipe, one side intercommunication at casing top has the inlet tube, the bottom of casing and be located the one side intercommunication of keeping away from the inlet tube have the drain pipe.
Preferably, the first flat gasket comprises first fluororubber, the first fluororubber is embedded at the top of the inner cavity of the groove, and the bottom of the first fluororubber is attached with a sapphire lens.
Preferably, the second flat gasket comprises second fluororubber, the second fluororubber is embedded in the inner cavity of the groove, the top of the second fluororubber is attached to the top of the sapphire lens, and the bottom of the inner cavity of the groove and the bottom of the second fluororubber are in threaded connection with a compression nut.
Preferably, the center of the top plate is provided with a threaded connecting hole, and the inner cavity of the tube body is communicated with a probe jack between the threaded connecting hole and the groove.
Preferably, the top of the top plate is provided with four groups of threaded mounting holes, and the threaded mounting holes are symmetrically arranged on the top of the top plate.
Preferably, the bottom of the shell is provided with a drain outlet, and a detection end of the drain outlet penetrates through the shell and extends to the inner cavity of the shell.
Preferably, one end of the second connecting pipe is communicated with an elbow pipe, and one end of the elbow pipe, which is far away from the connecting pipe, and one end of the fourth connecting pipe.
The endoscope is arranged in the pipeline in a secondary line mode, detects the oil in the pipeline through the endoscope detection probe, acquires color image information of the oil and transmits the color image information to the image transmission system;
transmitting image information to an image processing unit through the image transmission system; converting, by the image processing unit, image information into digital signal output values related to color depth; and comparing the received digital signal output value with a set value, if the crude oil leakage condition is greater than the set value, indicating that the color depth of the oil exceeds the limit, and giving a warning to an operator, wherein the operator needs to take corresponding measures immediately.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the cooling mechanism is arranged and absorbs heat, so that the purpose of internal circulation heat dissipation is achieved, and the heat dissipation effect is improved;
2. the threaded mounting holes are used for mounting the radiating fins, and the radiating performance of the outer surface of the device is improved by mounting the radiating fins;
3. the threaded connecting hole and the threaded connector are arranged, so that the connection between the top plate and the metal hose is tighter, and the sealing effect of preventing water leakage can be realized; through setting up first cooling coil and second cooling coil, can carry out series connection or parallel connection according to the cold volume demand.
Drawings
FIG. 1 is a front cross-sectional view of a tubular body of the present invention;
FIG. 2 is a schematic top view of the top plate of the present invention;
FIG. 3 is a front sectional view of the cooler of the present invention;
FIG. 4 is a side sectional view of the cooler of the present invention;
FIG. 5 is a top sectional view of the cooler of the present invention;
FIG. 6 is a block diagram of an endoscopic leak detection system for a tower top low temperature corrosion heat exchanger according to the present invention.
In the figure: 1. a top plate; 2. a cooling mechanism; 3. a pipe body; 4. a groove; 5. a first flat gasket; 6. a second flat washer; 7. a housing; 8. a first cooling coil; 9. a second cooling coil; 10. a first connecting pipe; 11. a second connecting pipe; 12. a third connecting pipe; 13. a fourth connecting pipe; 14. a first fluororubber; 15. a sapphire lens; 16. a second fluorine rubber; 17. a compression nut; 18. connecting a threaded hole; 19. a probe jack; 20. a threaded mounting hole; 21. a sewage draining outlet; 22. a water inlet pipe; 23. a drain pipe; 24. and (5) bending the pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art from the specification.
Example 1:
referring to fig. 1-5, the present invention provides a technical solution: an endoscope comprises a top plate 1 and a cooling mechanism 2, wherein a tube body 3 is fixedly installed at the bottom of the top plate 1, a groove 4 is formed in the bottom of the tube body 3, a threaded connecting hole 18 is formed in the center of the top plate 1, and a probe jack 19 is communicated between the threaded connecting hole 18 and the groove 4 in an inner cavity of the tube body 3;
a first flat gasket 5 is fixedly installed at the top of the groove 4, a second flat gasket 6 is fixedly installed in an inner cavity of the groove 4 and located at the top of the first flat gasket 5, the cooling mechanism 2 comprises a shell 7, a first cooling coil 8 and a second cooling coil 9 are respectively arranged on two sides of the inner cavity of the shell 7, one end of the first cooling coil 8 penetrates through the shell 7 and extends to the outside of the shell 7 and is communicated with a first connecting pipe 10, the other end of the first cooling coil 8 penetrates through the shell 7 and extends to the outside of the shell 7 and is communicated with a second connecting pipe 11, one end of the second cooling coil 9 penetrates through the shell 7 and extends to the outside of the shell 7 and is communicated with a third connecting pipe 12, and the other end of the second cooling coil 9 penetrates through the shell 7 and extends to the outside of the shell 7 and is communicated with a fourth connecting pipe 13;
as shown in fig. 6, the endoscope detection system for detecting leakage of the tower top low temperature corrosion heat exchanger comprises an endoscope, an endoscope detection unit for detecting oil in a pipeline, an image transmission unit connected with the endoscope detection unit, and an image processing unit connected with the image transmission unit, wherein the endoscope is installed in the pipeline in a secondary line manner, detects the oil in the pipeline through an endoscope detection probe, acquires color image information of the oil, and transmits the color image information to the image transmission system;
transmitting image information to an image processing unit through the image transmission system; converting, by the image processing unit, image information into digital signal output values related to color depth; comparing the received digital signal output value with a set value, if the crude oil leakage condition is greater than the set value, indicating that the color depth of the oil exceeds the limit, sending a warning to an operator, and immediately taking corresponding measures by the operator;
the adjustable cooling system, the endoscope detection system, the field explosion-proof cabinet and the like are integrated into a prying block device, and the pipeline is made of stainless steel; the temperature of the naphtha medium is 80-90 ℃, and the temperature is higher, so that the temperature is reduced to below 60 ℃ by an adjustable cooling system;
in the operation process of the equipment, once the heat exchanger leaks internally, the color of the first-level oil product on the top of the heat exchanger changes, the image information is converted into gray scale through special software, and a 4-20mmA analog quantity signal 4-20mA signal is output through the digital-to-analog conversion of the industrial personal computer and enters the DCS in a way of corresponding to the 0-255 gray scale; the detection system outputs an image signal and provides continuous real-time constant-top first-level oil product color information; the detection system can reflect the color change of the oil product in real time, can give an alarm timely and accurately when internal leakage occurs, has good fault tolerance and easy recoverability, and simultaneously has good operability and maintainability;
before the skid block equipment is put into operation, cooling water is firstly turned on and normal operation of the cooling water is ensured; then slowly opening a naphtha inlet valve of the prying block system to ensure that the medium entering the endoscope device is cooled naphtha; then slowly opening a naphtha outlet valve of the prying block system; the opening process is carried out slowly, so that high-temperature media are prevented from entering the endoscope device from the downstream, and the readings of the thermometer are observed at any time; because the valve on the main pipeline is also required to be adjusted so as to lead the medium to circulate in the system, the endoscope probe and the sapphire can also be taken out from the pipeline and subjected to temperature adjustment groping test after being sealed by a blind plate; after a certain experience is obtained, the endoscope probe and sapphire are then installed on the pipeline.
Example 2:
referring to fig. 1-5, the difference between the embodiment 2 and the embodiment 1 is:
the first flat gasket 5 comprises first fluororubber 14, the first fluororubber 14 is embedded at the top of the inner cavity of the groove 4, a sapphire lens 15 is attached to the bottom of the first fluororubber 14, the artificial sapphire lens belongs to an artificial sapphire crystal, and the first flat gasket is mainly applied to key materials for manufacturing LED lamps and is also an important window material for infrared military devices, satellite space technology and high-intensity lasers;
the second flat gasket 6 comprises second fluorine rubber 16, the second fluorine rubber 16 is embedded in the inner cavity of the groove 4, the top of the second fluorine rubber 16 is attached to the top of the sapphire lens 15, the bottom of the inner cavity of the groove 4 and the bottom of the second fluorine rubber 16 are in threaded connection with a compression nut 17, the fluorine rubber is a synthetic polymer elastomer containing fluorine atoms on carbon atoms of a main chain or a side chain, and the introduction of the fluorine atoms endows the rubber with excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance, so that the second flat gasket is widely applied to the fields of aerospace, aviation, automobiles, petroleum, household appliances and the like, and is used for sealing the bottom of the probe and limiting internal parts of the probe by arranging the compression nut 17.
Example 3:
referring to fig. 1 to 5, the difference between the present embodiment 3 and the embodiments 1 and 2 is:
the top of the top plate 1 is provided with four groups of threaded mounting holes 20, and the threaded mounting holes 20 are symmetrically arranged on the top of the top plate 1; the threaded mounting holes 20 are used for mounting the radiating fins, and the radiating performance of the outer surface of the device is improved by mounting the radiating fins;
a sewage draining exit 21 is arranged at the bottom of the shell 7, and a detection end of the sewage draining exit 21 penetrates through the shell 7 and extends to the inner cavity of the shell 7; the drain outlet 21 is used for monitoring the temperature of naphtha; one end of the second connecting pipe 11 is communicated with an elbow 24, and one end of the elbow 24 far away from the connecting pipe 11 and one end of the fourth connecting pipe 13;
one side at casing 7 top intercommunication has inlet tube 22, and the bottom of casing 7 just is located the one side intercommunication that keeps away from inlet tube 22 has drain pipe 23, through setting up inlet tube 22 and drain pipe 23 for pour into or discharge naphtha to casing 7.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (8)
1. An endoscope comprising a top plate (1) and a cooling mechanism (2), characterized in that: the bottom fixed mounting of roof (1) has body (3), the bottom of body (3) is seted up fluted (4), the top fixed mounting of recess (4) has first flat packing ring (5), the inner chamber of recess (4) just is located the top fixed mounting second flat packing ring (6) of first flat packing ring (5), cooling body (2) are including casing (7), the both sides of casing (7) inner chamber are provided with first cooling coil (8) and second cooling coil (9) respectively, the outside and the intercommunication that casing (7) were run through to the one end of first cooling coil (8) have first connecting pipe (10), the other end of first cooling coil (8) runs through casing (7) and extends to casing (7) outside and intercommunication have second connecting pipe (11), the outside and the intercommunication that casing (7) were run through to the one end of second cooling coil (9) have the third connection Pipe (12), the other end of second cooling coil (9) runs through casing (7) and extends to the outside of casing (7) and communicates there is fourth connecting pipe (13), one side intercommunication at casing (7) top has inlet tube (22), the bottom of casing (7) and the one side intercommunication that is located to keep away from inlet tube (22) have drain pipe (23).
2. An endoscope according to claim 1 and also comprising: the first flat gasket (5) comprises first fluororubber (14), the first fluororubber (14) is embedded at the top of the inner cavity of the groove (4), and a sapphire lens (15) is attached to the bottom of the first fluororubber (14).
3. An endoscope according to claim 2 and also comprising: the second flat gasket (6) comprises second fluororubber (16), the second fluororubber (16) is embedded in an inner cavity of the groove (4), the top of the second fluororubber (16) is attached to the top of the sapphire lens (15), and the bottom of the inner cavity of the groove (4) and the bottom of the second fluororubber (16) are in threaded connection with a compression nut (17).
4. An endoscope according to claim 1 and also comprising: the center of the top plate (1) is provided with a threaded connecting hole (18), and the inner cavity of the tube body (3) is communicated with a probe jack (19) between the threaded connecting hole (18) and the groove (4).
5. An endoscope according to claim 1 and also comprising: the top of roof (1) is seted up screw thread mounting hole (20), the quantity of screw thread mounting hole (20) is four groups and is the symmetry and sets up the top at roof (1).
6. An endoscope according to claim 1 and also comprising: the bottom of casing (7) is provided with drain (21), the probe end of drain (21) runs through casing (7) and extends to the inner chamber of casing (7).
7. An endoscope according to claim 1 and also comprising: one end of the second connecting pipe (11) is communicated with an elbow pipe (24), and one end of the elbow pipe (24) far away from the connecting pipe (11) and one end of the fourth connecting pipe (13).
8. The endoscope detection system for leakage of the tower top low-temperature corrosion heat exchanger is characterized in that: the oil color image detection device comprises the endoscope as claimed in any one of claims 1 to 9, an endoscope detection unit for detecting oil in a pipeline, an image transmission unit connected with the endoscope detection unit, and an image processing unit connected with the image transmission unit, wherein the endoscope is arranged in a pipeline in a secondary line manner, detects the oil in the pipeline through the endoscope detection probe, acquires color image information of the oil, and transmits the color image information to an image transmission system;
transmitting image information to an image processing unit through the image transmission system; converting, by the image processing unit, image information into digital signal output values related to color depth; and comparing the received digital signal output value with a set value, if the crude oil leakage condition is greater than the set value, indicating that the color depth of the oil exceeds the limit, and giving a warning to an operator, wherein the operator needs to take corresponding measures immediately.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110854246.5A CN113639930A (en) | 2021-07-28 | 2021-07-28 | Endoscope detection system and endoscope for leakage of tower top low-temperature corrosion heat exchanger |
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| CN202110854246.5A CN113639930A (en) | 2021-07-28 | 2021-07-28 | Endoscope detection system and endoscope for leakage of tower top low-temperature corrosion heat exchanger |
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